Commit | Line | Data |
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059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
9242a7e8 | 5 | /* Copyright (c) University of Cambridge 1995 - 2017 */ |
059ec3d9 PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | ||
9 | /* Functions for handling string expansion. */ | |
10 | ||
11 | ||
12 | #include "exim.h" | |
13 | ||
96c065cb PH |
14 | /* Recursively called function */ |
15 | ||
55414b25 JH |
16 | static uschar *expand_string_internal(const uschar *, BOOL, const uschar **, BOOL, BOOL, BOOL *); |
17 | static int_eximarith_t expanded_string_integer(const uschar *, BOOL); | |
96c065cb | 18 | |
059ec3d9 | 19 | #ifdef STAND_ALONE |
9d466bf7 JH |
20 | # ifndef SUPPORT_CRYPTEQ |
21 | # define SUPPORT_CRYPTEQ | |
22 | # endif | |
059ec3d9 PH |
23 | #endif |
24 | ||
96c065cb | 25 | #ifdef LOOKUP_LDAP |
9d466bf7 | 26 | # include "lookups/ldap.h" |
96c065cb PH |
27 | #endif |
28 | ||
059ec3d9 | 29 | #ifdef SUPPORT_CRYPTEQ |
9d466bf7 JH |
30 | # ifdef CRYPT_H |
31 | # include <crypt.h> | |
32 | # endif | |
33 | # ifndef HAVE_CRYPT16 | |
059ec3d9 | 34 | extern char* crypt16(char*, char*); |
9d466bf7 | 35 | # endif |
059ec3d9 PH |
36 | #endif |
37 | ||
96c065cb PH |
38 | /* The handling of crypt16() is a mess. I will record below the analysis of the |
39 | mess that was sent to me. We decided, however, to make changing this very low | |
40 | priority, because in practice people are moving away from the crypt() | |
41 | algorithms nowadays, so it doesn't seem worth it. | |
42 | ||
43 | <quote> | |
44 | There is an algorithm named "crypt16" in Ultrix and Tru64. It crypts | |
45 | the first 8 characters of the password using a 20-round version of crypt | |
46 | (standard crypt does 25 rounds). It then crypts the next 8 characters, | |
47 | or an empty block if the password is less than 9 characters, using a | |
48 | 20-round version of crypt and the same salt as was used for the first | |
4c04137d | 49 | block. Characters after the first 16 are ignored. It always generates |
96c065cb PH |
50 | a 16-byte hash, which is expressed together with the salt as a string |
51 | of 24 base 64 digits. Here are some links to peruse: | |
52 | ||
53 | http://cvs.pld.org.pl/pam/pamcrypt/crypt16.c?rev=1.2 | |
54 | http://seclists.org/bugtraq/1999/Mar/0076.html | |
55 | ||
56 | There's a different algorithm named "bigcrypt" in HP-UX, Digital Unix, | |
57 | and OSF/1. This is the same as the standard crypt if given a password | |
58 | of 8 characters or less. If given more, it first does the same as crypt | |
59 | using the first 8 characters, then crypts the next 8 (the 9th to 16th) | |
60 | using as salt the first two base 64 digits from the first hash block. | |
61 | If the password is more than 16 characters then it crypts the 17th to 24th | |
62 | characters using as salt the first two base 64 digits from the second hash | |
63 | block. And so on: I've seen references to it cutting off the password at | |
64 | 40 characters (5 blocks), 80 (10 blocks), or 128 (16 blocks). Some links: | |
65 | ||
66 | http://cvs.pld.org.pl/pam/pamcrypt/bigcrypt.c?rev=1.2 | |
67 | http://seclists.org/bugtraq/1999/Mar/0109.html | |
68 | http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/HTML/AA-Q0R2D- | |
69 | TET1_html/sec.c222.html#no_id_208 | |
70 | ||
71 | Exim has something it calls "crypt16". It will either use a native | |
72 | crypt16 or its own implementation. A native crypt16 will presumably | |
73 | be the one that I called "crypt16" above. The internal "crypt16" | |
74 | function, however, is a two-block-maximum implementation of what I called | |
75 | "bigcrypt". The documentation matches the internal code. | |
76 | ||
77 | I suspect that whoever did the "crypt16" stuff for Exim didn't realise | |
78 | that crypt16 and bigcrypt were different things. | |
79 | ||
80 | Exim uses the LDAP-style scheme identifier "{crypt16}" to refer | |
81 | to whatever it is using under that name. This unfortunately sets a | |
82 | precedent for using "{crypt16}" to identify two incompatible algorithms | |
83 | whose output can't be distinguished. With "{crypt16}" thus rendered | |
84 | ambiguous, I suggest you deprecate it and invent two new identifiers | |
85 | for the two algorithms. | |
86 | ||
87 | Both crypt16 and bigcrypt are very poor algorithms, btw. Hashing parts | |
88 | of the password separately means they can be cracked separately, so | |
89 | the double-length hash only doubles the cracking effort instead of | |
90 | squaring it. I recommend salted SHA-1 ({SSHA}), or the Blowfish-based | |
91 | bcrypt ({CRYPT}$2a$). | |
92 | </quote> | |
93 | */ | |
059ec3d9 PH |
94 | |
95 | ||
059ec3d9 | 96 | |
059ec3d9 PH |
97 | /************************************************* |
98 | * Local statics and tables * | |
99 | *************************************************/ | |
100 | ||
101 | /* Table of item names, and corresponding switch numbers. The names must be in | |
102 | alphabetical order. */ | |
103 | ||
104 | static uschar *item_table[] = { | |
723c72e6 | 105 | US"acl", |
9d1c15ef | 106 | US"certextract", |
1a46a8c5 | 107 | US"dlfunc", |
089fc87a | 108 | US"env", |
059ec3d9 | 109 | US"extract", |
29f89cad | 110 | US"filter", |
059ec3d9 PH |
111 | US"hash", |
112 | US"hmac", | |
113 | US"if", | |
8c5d388a | 114 | #ifdef SUPPORT_I18N |
ed0512a1 JH |
115 | US"imapfolder", |
116 | #endif | |
059ec3d9 | 117 | US"length", |
aa26e137 | 118 | US"listextract", |
059ec3d9 | 119 | US"lookup", |
29f89cad | 120 | US"map", |
059ec3d9 | 121 | US"nhash", |
1a46a8c5 | 122 | US"perl", |
fffda43a TK |
123 | US"prvs", |
124 | US"prvscheck", | |
059ec3d9 PH |
125 | US"readfile", |
126 | US"readsocket", | |
29f89cad | 127 | US"reduce", |
059ec3d9 PH |
128 | US"run", |
129 | US"sg", | |
ac4ef9bd | 130 | US"sort", |
059ec3d9 PH |
131 | US"substr", |
132 | US"tr" }; | |
133 | ||
134 | enum { | |
723c72e6 | 135 | EITEM_ACL, |
9d1c15ef | 136 | EITEM_CERTEXTRACT, |
1a46a8c5 | 137 | EITEM_DLFUNC, |
089fc87a | 138 | EITEM_ENV, |
059ec3d9 | 139 | EITEM_EXTRACT, |
29f89cad | 140 | EITEM_FILTER, |
059ec3d9 PH |
141 | EITEM_HASH, |
142 | EITEM_HMAC, | |
143 | EITEM_IF, | |
8c5d388a | 144 | #ifdef SUPPORT_I18N |
ed0512a1 JH |
145 | EITEM_IMAPFOLDER, |
146 | #endif | |
059ec3d9 | 147 | EITEM_LENGTH, |
aa26e137 | 148 | EITEM_LISTEXTRACT, |
059ec3d9 | 149 | EITEM_LOOKUP, |
29f89cad | 150 | EITEM_MAP, |
059ec3d9 | 151 | EITEM_NHASH, |
1a46a8c5 | 152 | EITEM_PERL, |
fffda43a TK |
153 | EITEM_PRVS, |
154 | EITEM_PRVSCHECK, | |
059ec3d9 PH |
155 | EITEM_READFILE, |
156 | EITEM_READSOCK, | |
29f89cad | 157 | EITEM_REDUCE, |
059ec3d9 PH |
158 | EITEM_RUN, |
159 | EITEM_SG, | |
ac4ef9bd | 160 | EITEM_SORT, |
059ec3d9 PH |
161 | EITEM_SUBSTR, |
162 | EITEM_TR }; | |
163 | ||
164 | /* Tables of operator names, and corresponding switch numbers. The names must be | |
165 | in alphabetical order. There are two tables, because underscore is used in some | |
166 | cases to introduce arguments, whereas for other it is part of the name. This is | |
167 | an historical mis-design. */ | |
168 | ||
169 | static uschar *op_table_underscore[] = { | |
170 | US"from_utf8", | |
171 | US"local_part", | |
172 | US"quote_local_part", | |
83e029d5 | 173 | US"reverse_ip", |
f90d018c | 174 | US"time_eval", |
4e08fd50 | 175 | US"time_interval" |
8c5d388a | 176 | #ifdef SUPPORT_I18N |
4e08fd50 JH |
177 | ,US"utf8_domain_from_alabel", |
178 | US"utf8_domain_to_alabel", | |
179 | US"utf8_localpart_from_alabel", | |
180 | US"utf8_localpart_to_alabel" | |
181 | #endif | |
182 | }; | |
059ec3d9 PH |
183 | |
184 | enum { | |
185 | EOP_FROM_UTF8, | |
186 | EOP_LOCAL_PART, | |
187 | EOP_QUOTE_LOCAL_PART, | |
83e029d5 | 188 | EOP_REVERSE_IP, |
f90d018c | 189 | EOP_TIME_EVAL, |
4e08fd50 | 190 | EOP_TIME_INTERVAL |
8c5d388a | 191 | #ifdef SUPPORT_I18N |
4e08fd50 JH |
192 | ,EOP_UTF8_DOMAIN_FROM_ALABEL, |
193 | EOP_UTF8_DOMAIN_TO_ALABEL, | |
194 | EOP_UTF8_LOCALPART_FROM_ALABEL, | |
195 | EOP_UTF8_LOCALPART_TO_ALABEL | |
196 | #endif | |
197 | }; | |
059ec3d9 PH |
198 | |
199 | static uschar *op_table_main[] = { | |
200 | US"address", | |
29f89cad | 201 | US"addresses", |
03ca21f8 JH |
202 | US"base32", |
203 | US"base32d", | |
059ec3d9 PH |
204 | US"base62", |
205 | US"base62d", | |
9aa35e9c JH |
206 | US"base64", |
207 | US"base64d", | |
059ec3d9 PH |
208 | US"domain", |
209 | US"escape", | |
3367f8c2 | 210 | US"escape8bit", |
059ec3d9 PH |
211 | US"eval", |
212 | US"eval10", | |
213 | US"expand", | |
214 | US"h", | |
215 | US"hash", | |
216 | US"hex2b64", | |
c393f931 | 217 | US"hexquote", |
fc4a7f70 JH |
218 | US"ipv6denorm", |
219 | US"ipv6norm", | |
059ec3d9 PH |
220 | US"l", |
221 | US"lc", | |
222 | US"length", | |
a64a3dfa JH |
223 | US"listcount", |
224 | US"listnamed", | |
059ec3d9 PH |
225 | US"mask", |
226 | US"md5", | |
227 | US"nh", | |
228 | US"nhash", | |
229 | US"quote", | |
9e3331ea | 230 | US"randint", |
059ec3d9 | 231 | US"rfc2047", |
9c57cbc0 | 232 | US"rfc2047d", |
059ec3d9 PH |
233 | US"rxquote", |
234 | US"s", | |
235 | US"sha1", | |
9ef9101c | 236 | US"sha256", |
6e773413 | 237 | US"sha3", |
059ec3d9 PH |
238 | US"stat", |
239 | US"str2b64", | |
240 | US"strlen", | |
241 | US"substr", | |
b9c2e32f AR |
242 | US"uc", |
243 | US"utf8clean" }; | |
059ec3d9 PH |
244 | |
245 | enum { | |
0539a19d | 246 | EOP_ADDRESS = nelem(op_table_underscore), |
29f89cad | 247 | EOP_ADDRESSES, |
03ca21f8 JH |
248 | EOP_BASE32, |
249 | EOP_BASE32D, | |
059ec3d9 PH |
250 | EOP_BASE62, |
251 | EOP_BASE62D, | |
9aa35e9c JH |
252 | EOP_BASE64, |
253 | EOP_BASE64D, | |
059ec3d9 PH |
254 | EOP_DOMAIN, |
255 | EOP_ESCAPE, | |
3367f8c2 | 256 | EOP_ESCAPE8BIT, |
059ec3d9 PH |
257 | EOP_EVAL, |
258 | EOP_EVAL10, | |
259 | EOP_EXPAND, | |
260 | EOP_H, | |
261 | EOP_HASH, | |
262 | EOP_HEX2B64, | |
c393f931 | 263 | EOP_HEXQUOTE, |
fc4a7f70 JH |
264 | EOP_IPV6DENORM, |
265 | EOP_IPV6NORM, | |
059ec3d9 PH |
266 | EOP_L, |
267 | EOP_LC, | |
268 | EOP_LENGTH, | |
a64a3dfa JH |
269 | EOP_LISTCOUNT, |
270 | EOP_LISTNAMED, | |
059ec3d9 PH |
271 | EOP_MASK, |
272 | EOP_MD5, | |
273 | EOP_NH, | |
274 | EOP_NHASH, | |
275 | EOP_QUOTE, | |
9e3331ea | 276 | EOP_RANDINT, |
059ec3d9 | 277 | EOP_RFC2047, |
9c57cbc0 | 278 | EOP_RFC2047D, |
059ec3d9 PH |
279 | EOP_RXQUOTE, |
280 | EOP_S, | |
281 | EOP_SHA1, | |
9ef9101c | 282 | EOP_SHA256, |
6e773413 | 283 | EOP_SHA3, |
059ec3d9 PH |
284 | EOP_STAT, |
285 | EOP_STR2B64, | |
286 | EOP_STRLEN, | |
287 | EOP_SUBSTR, | |
b9c2e32f AR |
288 | EOP_UC, |
289 | EOP_UTF8CLEAN }; | |
059ec3d9 PH |
290 | |
291 | ||
292 | /* Table of condition names, and corresponding switch numbers. The names must | |
293 | be in alphabetical order. */ | |
294 | ||
295 | static uschar *cond_table[] = { | |
296 | US"<", | |
297 | US"<=", | |
298 | US"=", | |
299 | US"==", /* Backward compatibility */ | |
300 | US">", | |
301 | US">=", | |
333eea9c | 302 | US"acl", |
059ec3d9 | 303 | US"and", |
f3766eb5 | 304 | US"bool", |
6a8de854 | 305 | US"bool_lax", |
059ec3d9 PH |
306 | US"crypteq", |
307 | US"def", | |
308 | US"eq", | |
309 | US"eqi", | |
310 | US"exists", | |
311 | US"first_delivery", | |
0ce9abe6 PH |
312 | US"forall", |
313 | US"forany", | |
059ec3d9 PH |
314 | US"ge", |
315 | US"gei", | |
316 | US"gt", | |
317 | US"gti", | |
76dca828 PP |
318 | US"inlist", |
319 | US"inlisti", | |
059ec3d9 PH |
320 | US"isip", |
321 | US"isip4", | |
322 | US"isip6", | |
323 | US"ldapauth", | |
324 | US"le", | |
325 | US"lei", | |
326 | US"lt", | |
327 | US"lti", | |
328 | US"match", | |
329 | US"match_address", | |
330 | US"match_domain", | |
32d668a5 | 331 | US"match_ip", |
059ec3d9 PH |
332 | US"match_local_part", |
333 | US"or", | |
334 | US"pam", | |
335 | US"pwcheck", | |
336 | US"queue_running", | |
337 | US"radius", | |
338 | US"saslauthd" | |
339 | }; | |
340 | ||
341 | enum { | |
342 | ECOND_NUM_L, | |
343 | ECOND_NUM_LE, | |
344 | ECOND_NUM_E, | |
345 | ECOND_NUM_EE, | |
346 | ECOND_NUM_G, | |
347 | ECOND_NUM_GE, | |
333eea9c | 348 | ECOND_ACL, |
059ec3d9 | 349 | ECOND_AND, |
f3766eb5 | 350 | ECOND_BOOL, |
6a8de854 | 351 | ECOND_BOOL_LAX, |
059ec3d9 PH |
352 | ECOND_CRYPTEQ, |
353 | ECOND_DEF, | |
354 | ECOND_STR_EQ, | |
355 | ECOND_STR_EQI, | |
356 | ECOND_EXISTS, | |
357 | ECOND_FIRST_DELIVERY, | |
0ce9abe6 PH |
358 | ECOND_FORALL, |
359 | ECOND_FORANY, | |
059ec3d9 PH |
360 | ECOND_STR_GE, |
361 | ECOND_STR_GEI, | |
362 | ECOND_STR_GT, | |
363 | ECOND_STR_GTI, | |
76dca828 PP |
364 | ECOND_INLIST, |
365 | ECOND_INLISTI, | |
059ec3d9 PH |
366 | ECOND_ISIP, |
367 | ECOND_ISIP4, | |
368 | ECOND_ISIP6, | |
369 | ECOND_LDAPAUTH, | |
370 | ECOND_STR_LE, | |
371 | ECOND_STR_LEI, | |
372 | ECOND_STR_LT, | |
373 | ECOND_STR_LTI, | |
374 | ECOND_MATCH, | |
375 | ECOND_MATCH_ADDRESS, | |
376 | ECOND_MATCH_DOMAIN, | |
32d668a5 | 377 | ECOND_MATCH_IP, |
059ec3d9 PH |
378 | ECOND_MATCH_LOCAL_PART, |
379 | ECOND_OR, | |
380 | ECOND_PAM, | |
381 | ECOND_PWCHECK, | |
382 | ECOND_QUEUE_RUNNING, | |
383 | ECOND_RADIUS, | |
384 | ECOND_SASLAUTHD | |
385 | }; | |
386 | ||
387 | ||
059ec3d9 PH |
388 | /* Types of table entry */ |
389 | ||
7e75538e | 390 | enum vtypes { |
059ec3d9 PH |
391 | vtype_int, /* value is address of int */ |
392 | vtype_filter_int, /* ditto, but recognized only when filtering */ | |
393 | vtype_ino, /* value is address of ino_t (not always an int) */ | |
394 | vtype_uid, /* value is address of uid_t (not always an int) */ | |
395 | vtype_gid, /* value is address of gid_t (not always an int) */ | |
11d7e4fa | 396 | vtype_bool, /* value is address of bool */ |
059ec3d9 PH |
397 | vtype_stringptr, /* value is address of pointer to string */ |
398 | vtype_msgbody, /* as stringptr, but read when first required */ | |
399 | vtype_msgbody_end, /* ditto, the end of the message */ | |
ff75a1f7 PH |
400 | vtype_msgheaders, /* the message's headers, processed */ |
401 | vtype_msgheaders_raw, /* the message's headers, unprocessed */ | |
059ec3d9 PH |
402 | vtype_localpart, /* extract local part from string */ |
403 | vtype_domain, /* extract domain from string */ | |
362145b5 | 404 | vtype_string_func, /* value is string returned by given function */ |
059ec3d9 PH |
405 | vtype_todbsdin, /* value not used; generate BSD inbox tod */ |
406 | vtype_tode, /* value not used; generate tod in epoch format */ | |
f5787926 | 407 | vtype_todel, /* value not used; generate tod in epoch/usec format */ |
059ec3d9 PH |
408 | vtype_todf, /* value not used; generate full tod */ |
409 | vtype_todl, /* value not used; generate log tod */ | |
410 | vtype_todlf, /* value not used; generate log file datestamp tod */ | |
411 | vtype_todzone, /* value not used; generate time zone only */ | |
412 | vtype_todzulu, /* value not used; generate zulu tod */ | |
413 | vtype_reply, /* value not used; get reply from headers */ | |
414 | vtype_pid, /* value not used; result is pid */ | |
415 | vtype_host_lookup, /* value not used; get host name */ | |
5cb8cbc6 PH |
416 | vtype_load_avg, /* value not used; result is int from os_getloadavg */ |
417 | vtype_pspace, /* partition space; value is T/F for spool/log */ | |
9d1c15ef JH |
418 | vtype_pinodes, /* partition inodes; value is T/F for spool/log */ |
419 | vtype_cert /* SSL certificate */ | |
80a47a2c TK |
420 | #ifndef DISABLE_DKIM |
421 | ,vtype_dkim /* Lookup of value in DKIM signature */ | |
422 | #endif | |
7e75538e JH |
423 | }; |
424 | ||
425 | /* Type for main variable table */ | |
426 | ||
427 | typedef struct { | |
428 | const char *name; | |
429 | enum vtypes type; | |
430 | void *value; | |
431 | } var_entry; | |
432 | ||
433 | /* Type for entries pointing to address/length pairs. Not currently | |
434 | in use. */ | |
435 | ||
436 | typedef struct { | |
437 | uschar **address; | |
438 | int *length; | |
439 | } alblock; | |
059ec3d9 | 440 | |
362145b5 JH |
441 | static uschar * fn_recipients(void); |
442 | ||
059ec3d9 PH |
443 | /* This table must be kept in alphabetical order. */ |
444 | ||
445 | static var_entry var_table[] = { | |
38a0a95f PH |
446 | /* WARNING: Do not invent variables whose names start acl_c or acl_m because |
447 | they will be confused with user-creatable ACL variables. */ | |
525239c1 JH |
448 | { "acl_arg1", vtype_stringptr, &acl_arg[0] }, |
449 | { "acl_arg2", vtype_stringptr, &acl_arg[1] }, | |
450 | { "acl_arg3", vtype_stringptr, &acl_arg[2] }, | |
451 | { "acl_arg4", vtype_stringptr, &acl_arg[3] }, | |
452 | { "acl_arg5", vtype_stringptr, &acl_arg[4] }, | |
453 | { "acl_arg6", vtype_stringptr, &acl_arg[5] }, | |
454 | { "acl_arg7", vtype_stringptr, &acl_arg[6] }, | |
455 | { "acl_arg8", vtype_stringptr, &acl_arg[7] }, | |
456 | { "acl_arg9", vtype_stringptr, &acl_arg[8] }, | |
457 | { "acl_narg", vtype_int, &acl_narg }, | |
059ec3d9 PH |
458 | { "acl_verify_message", vtype_stringptr, &acl_verify_message }, |
459 | { "address_data", vtype_stringptr, &deliver_address_data }, | |
460 | { "address_file", vtype_stringptr, &address_file }, | |
461 | { "address_pipe", vtype_stringptr, &address_pipe }, | |
2d07a215 | 462 | { "authenticated_fail_id",vtype_stringptr, &authenticated_fail_id }, |
059ec3d9 PH |
463 | { "authenticated_id", vtype_stringptr, &authenticated_id }, |
464 | { "authenticated_sender",vtype_stringptr, &authenticated_sender }, | |
465 | { "authentication_failed",vtype_int, &authentication_failed }, | |
9e949f00 PP |
466 | #ifdef WITH_CONTENT_SCAN |
467 | { "av_failed", vtype_int, &av_failed }, | |
468 | #endif | |
8523533c TK |
469 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
470 | { "bmi_alt_location", vtype_stringptr, &bmi_alt_location }, | |
471 | { "bmi_base64_tracker_verdict", vtype_stringptr, &bmi_base64_tracker_verdict }, | |
472 | { "bmi_base64_verdict", vtype_stringptr, &bmi_base64_verdict }, | |
473 | { "bmi_deliver", vtype_int, &bmi_deliver }, | |
474 | #endif | |
059ec3d9 PH |
475 | { "body_linecount", vtype_int, &body_linecount }, |
476 | { "body_zerocount", vtype_int, &body_zerocount }, | |
477 | { "bounce_recipient", vtype_stringptr, &bounce_recipient }, | |
478 | { "bounce_return_size_limit", vtype_int, &bounce_return_size_limit }, | |
479 | { "caller_gid", vtype_gid, &real_gid }, | |
480 | { "caller_uid", vtype_uid, &real_uid }, | |
055e2cb4 | 481 | { "callout_address", vtype_stringptr, &callout_address }, |
059ec3d9 PH |
482 | { "compile_date", vtype_stringptr, &version_date }, |
483 | { "compile_number", vtype_stringptr, &version_cnumber }, | |
98b8312f HSHR |
484 | { "config_dir", vtype_stringptr, &config_main_directory }, |
485 | { "config_file", vtype_stringptr, &config_main_filename }, | |
e5a9dba6 | 486 | { "csa_status", vtype_stringptr, &csa_status }, |
6a8f9482 TK |
487 | #ifdef EXPERIMENTAL_DCC |
488 | { "dcc_header", vtype_stringptr, &dcc_header }, | |
489 | { "dcc_result", vtype_stringptr, &dcc_result }, | |
490 | #endif | |
80a47a2c TK |
491 | #ifndef DISABLE_DKIM |
492 | { "dkim_algo", vtype_dkim, (void *)DKIM_ALGO }, | |
493 | { "dkim_bodylength", vtype_dkim, (void *)DKIM_BODYLENGTH }, | |
494 | { "dkim_canon_body", vtype_dkim, (void *)DKIM_CANON_BODY }, | |
495 | { "dkim_canon_headers", vtype_dkim, (void *)DKIM_CANON_HEADERS }, | |
496 | { "dkim_copiedheaders", vtype_dkim, (void *)DKIM_COPIEDHEADERS }, | |
497 | { "dkim_created", vtype_dkim, (void *)DKIM_CREATED }, | |
2df588c9 | 498 | { "dkim_cur_signer", vtype_stringptr, &dkim_cur_signer }, |
e08d09e5 | 499 | { "dkim_domain", vtype_stringptr, &dkim_signing_domain }, |
80a47a2c TK |
500 | { "dkim_expires", vtype_dkim, (void *)DKIM_EXPIRES }, |
501 | { "dkim_headernames", vtype_dkim, (void *)DKIM_HEADERNAMES }, | |
502 | { "dkim_identity", vtype_dkim, (void *)DKIM_IDENTITY }, | |
503 | { "dkim_key_granularity",vtype_dkim, (void *)DKIM_KEY_GRANULARITY }, | |
abe1010c | 504 | { "dkim_key_length", vtype_int, &dkim_key_length }, |
80a47a2c TK |
505 | { "dkim_key_nosubdomains",vtype_dkim, (void *)DKIM_NOSUBDOMAINS }, |
506 | { "dkim_key_notes", vtype_dkim, (void *)DKIM_KEY_NOTES }, | |
507 | { "dkim_key_srvtype", vtype_dkim, (void *)DKIM_KEY_SRVTYPE }, | |
508 | { "dkim_key_testing", vtype_dkim, (void *)DKIM_KEY_TESTING }, | |
e08d09e5 | 509 | { "dkim_selector", vtype_stringptr, &dkim_signing_selector }, |
9e5d6b55 | 510 | { "dkim_signers", vtype_stringptr, &dkim_signers }, |
a79d8834 JH |
511 | { "dkim_verify_reason", vtype_stringptr, &dkim_verify_reason }, |
512 | { "dkim_verify_status", vtype_stringptr, &dkim_verify_status }, | |
4840604e TL |
513 | #endif |
514 | #ifdef EXPERIMENTAL_DMARC | |
515 | { "dmarc_ar_header", vtype_stringptr, &dmarc_ar_header }, | |
8c8b8274 | 516 | { "dmarc_domain_policy", vtype_stringptr, &dmarc_domain_policy }, |
4840604e TL |
517 | { "dmarc_status", vtype_stringptr, &dmarc_status }, |
518 | { "dmarc_status_text", vtype_stringptr, &dmarc_status_text }, | |
519 | { "dmarc_used_domain", vtype_stringptr, &dmarc_used_domain }, | |
8523533c | 520 | #endif |
059ec3d9 | 521 | { "dnslist_domain", vtype_stringptr, &dnslist_domain }, |
93655c46 | 522 | { "dnslist_matched", vtype_stringptr, &dnslist_matched }, |
059ec3d9 PH |
523 | { "dnslist_text", vtype_stringptr, &dnslist_text }, |
524 | { "dnslist_value", vtype_stringptr, &dnslist_value }, | |
525 | { "domain", vtype_stringptr, &deliver_domain }, | |
526 | { "domain_data", vtype_stringptr, &deliver_domain_data }, | |
0cbf2b82 | 527 | #ifndef DISABLE_EVENT |
774ef2d7 JH |
528 | { "event_data", vtype_stringptr, &event_data }, |
529 | ||
530 | /*XXX want to use generic vars for as many of these as possible*/ | |
531 | { "event_defer_errno", vtype_int, &event_defer_errno }, | |
532 | ||
533 | { "event_name", vtype_stringptr, &event_name }, | |
534 | #endif | |
059ec3d9 PH |
535 | { "exim_gid", vtype_gid, &exim_gid }, |
536 | { "exim_path", vtype_stringptr, &exim_path }, | |
537 | { "exim_uid", vtype_uid, &exim_uid }, | |
71224040 | 538 | { "exim_version", vtype_stringptr, &version_string }, |
362145b5 | 539 | { "headers_added", vtype_string_func, &fn_hdrs_added }, |
059ec3d9 PH |
540 | { "home", vtype_stringptr, &deliver_home }, |
541 | { "host", vtype_stringptr, &deliver_host }, | |
542 | { "host_address", vtype_stringptr, &deliver_host_address }, | |
543 | { "host_data", vtype_stringptr, &host_data }, | |
b08b24c8 | 544 | { "host_lookup_deferred",vtype_int, &host_lookup_deferred }, |
059ec3d9 | 545 | { "host_lookup_failed", vtype_int, &host_lookup_failed }, |
a7538db1 | 546 | { "host_port", vtype_int, &deliver_host_port }, |
3615fa9a | 547 | { "initial_cwd", vtype_stringptr, &initial_cwd }, |
059ec3d9 PH |
548 | { "inode", vtype_ino, &deliver_inode }, |
549 | { "interface_address", vtype_stringptr, &interface_address }, | |
550 | { "interface_port", vtype_int, &interface_port }, | |
0ce9abe6 | 551 | { "item", vtype_stringptr, &iterate_item }, |
059ec3d9 PH |
552 | #ifdef LOOKUP_LDAP |
553 | { "ldap_dn", vtype_stringptr, &eldap_dn }, | |
554 | #endif | |
555 | { "load_average", vtype_load_avg, NULL }, | |
556 | { "local_part", vtype_stringptr, &deliver_localpart }, | |
557 | { "local_part_data", vtype_stringptr, &deliver_localpart_data }, | |
558 | { "local_part_prefix", vtype_stringptr, &deliver_localpart_prefix }, | |
559 | { "local_part_suffix", vtype_stringptr, &deliver_localpart_suffix }, | |
560 | { "local_scan_data", vtype_stringptr, &local_scan_data }, | |
561 | { "local_user_gid", vtype_gid, &local_user_gid }, | |
562 | { "local_user_uid", vtype_uid, &local_user_uid }, | |
563 | { "localhost_number", vtype_int, &host_number }, | |
5cb8cbc6 | 564 | { "log_inodes", vtype_pinodes, (void *)FALSE }, |
8e669ac1 | 565 | { "log_space", vtype_pspace, (void *)FALSE }, |
4e0983dc | 566 | { "lookup_dnssec_authenticated",vtype_stringptr,&lookup_dnssec_authenticated}, |
059ec3d9 | 567 | { "mailstore_basename", vtype_stringptr, &mailstore_basename }, |
8523533c TK |
568 | #ifdef WITH_CONTENT_SCAN |
569 | { "malware_name", vtype_stringptr, &malware_name }, | |
570 | #endif | |
d677b2f2 | 571 | { "max_received_linelength", vtype_int, &max_received_linelength }, |
059ec3d9 PH |
572 | { "message_age", vtype_int, &message_age }, |
573 | { "message_body", vtype_msgbody, &message_body }, | |
574 | { "message_body_end", vtype_msgbody_end, &message_body_end }, | |
575 | { "message_body_size", vtype_int, &message_body_size }, | |
1ab52c69 | 576 | { "message_exim_id", vtype_stringptr, &message_id }, |
059ec3d9 | 577 | { "message_headers", vtype_msgheaders, NULL }, |
ff75a1f7 | 578 | { "message_headers_raw", vtype_msgheaders_raw, NULL }, |
059ec3d9 | 579 | { "message_id", vtype_stringptr, &message_id }, |
2e0c1448 | 580 | { "message_linecount", vtype_int, &message_linecount }, |
059ec3d9 | 581 | { "message_size", vtype_int, &message_size }, |
8c5d388a | 582 | #ifdef SUPPORT_I18N |
eb02f5df JH |
583 | { "message_smtputf8", vtype_bool, &message_smtputf8 }, |
584 | #endif | |
8523533c TK |
585 | #ifdef WITH_CONTENT_SCAN |
586 | { "mime_anomaly_level", vtype_int, &mime_anomaly_level }, | |
587 | { "mime_anomaly_text", vtype_stringptr, &mime_anomaly_text }, | |
588 | { "mime_boundary", vtype_stringptr, &mime_boundary }, | |
589 | { "mime_charset", vtype_stringptr, &mime_charset }, | |
590 | { "mime_content_description", vtype_stringptr, &mime_content_description }, | |
591 | { "mime_content_disposition", vtype_stringptr, &mime_content_disposition }, | |
592 | { "mime_content_id", vtype_stringptr, &mime_content_id }, | |
593 | { "mime_content_size", vtype_int, &mime_content_size }, | |
594 | { "mime_content_transfer_encoding",vtype_stringptr, &mime_content_transfer_encoding }, | |
595 | { "mime_content_type", vtype_stringptr, &mime_content_type }, | |
596 | { "mime_decoded_filename", vtype_stringptr, &mime_decoded_filename }, | |
597 | { "mime_filename", vtype_stringptr, &mime_filename }, | |
598 | { "mime_is_coverletter", vtype_int, &mime_is_coverletter }, | |
599 | { "mime_is_multipart", vtype_int, &mime_is_multipart }, | |
600 | { "mime_is_rfc822", vtype_int, &mime_is_rfc822 }, | |
601 | { "mime_part_count", vtype_int, &mime_part_count }, | |
602 | #endif | |
059ec3d9 PH |
603 | { "n0", vtype_filter_int, &filter_n[0] }, |
604 | { "n1", vtype_filter_int, &filter_n[1] }, | |
605 | { "n2", vtype_filter_int, &filter_n[2] }, | |
606 | { "n3", vtype_filter_int, &filter_n[3] }, | |
607 | { "n4", vtype_filter_int, &filter_n[4] }, | |
608 | { "n5", vtype_filter_int, &filter_n[5] }, | |
609 | { "n6", vtype_filter_int, &filter_n[6] }, | |
610 | { "n7", vtype_filter_int, &filter_n[7] }, | |
611 | { "n8", vtype_filter_int, &filter_n[8] }, | |
612 | { "n9", vtype_filter_int, &filter_n[9] }, | |
613 | { "original_domain", vtype_stringptr, &deliver_domain_orig }, | |
614 | { "original_local_part", vtype_stringptr, &deliver_localpart_orig }, | |
615 | { "originator_gid", vtype_gid, &originator_gid }, | |
616 | { "originator_uid", vtype_uid, &originator_uid }, | |
617 | { "parent_domain", vtype_stringptr, &deliver_domain_parent }, | |
618 | { "parent_local_part", vtype_stringptr, &deliver_localpart_parent }, | |
619 | { "pid", vtype_pid, NULL }, | |
858e91c2 JH |
620 | #ifndef DISABLE_PRDR |
621 | { "prdr_requested", vtype_bool, &prdr_requested }, | |
622 | #endif | |
059ec3d9 | 623 | { "primary_hostname", vtype_stringptr, &primary_hostname }, |
e6d2a989 JH |
624 | #if defined(SUPPORT_PROXY) || defined(SUPPORT_SOCKS) |
625 | { "proxy_external_address",vtype_stringptr, &proxy_external_address }, | |
626 | { "proxy_external_port", vtype_int, &proxy_external_port }, | |
627 | { "proxy_local_address", vtype_stringptr, &proxy_local_address }, | |
628 | { "proxy_local_port", vtype_int, &proxy_local_port }, | |
a3c86431 TL |
629 | { "proxy_session", vtype_bool, &proxy_session }, |
630 | #endif | |
fffda43a TK |
631 | { "prvscheck_address", vtype_stringptr, &prvscheck_address }, |
632 | { "prvscheck_keynum", vtype_stringptr, &prvscheck_keynum }, | |
633 | { "prvscheck_result", vtype_stringptr, &prvscheck_result }, | |
059ec3d9 PH |
634 | { "qualify_domain", vtype_stringptr, &qualify_domain_sender }, |
635 | { "qualify_recipient", vtype_stringptr, &qualify_domain_recipient }, | |
0cd5fd23 | 636 | { "queue_name", vtype_stringptr, &queue_name }, |
059ec3d9 PH |
637 | { "rcpt_count", vtype_int, &rcpt_count }, |
638 | { "rcpt_defer_count", vtype_int, &rcpt_defer_count }, | |
639 | { "rcpt_fail_count", vtype_int, &rcpt_fail_count }, | |
640 | { "received_count", vtype_int, &received_count }, | |
641 | { "received_for", vtype_stringptr, &received_for }, | |
194cc0e4 PH |
642 | { "received_ip_address", vtype_stringptr, &interface_address }, |
643 | { "received_port", vtype_int, &interface_port }, | |
059ec3d9 | 644 | { "received_protocol", vtype_stringptr, &received_protocol }, |
32dfdf8b | 645 | { "received_time", vtype_int, &received_time.tv_sec }, |
059ec3d9 | 646 | { "recipient_data", vtype_stringptr, &recipient_data }, |
8e669ac1 | 647 | { "recipient_verify_failure",vtype_stringptr,&recipient_verify_failure }, |
362145b5 | 648 | { "recipients", vtype_string_func, &fn_recipients }, |
059ec3d9 | 649 | { "recipients_count", vtype_int, &recipients_count }, |
8523533c TK |
650 | #ifdef WITH_CONTENT_SCAN |
651 | { "regex_match_string", vtype_stringptr, ®ex_match_string }, | |
652 | #endif | |
059ec3d9 PH |
653 | { "reply_address", vtype_reply, NULL }, |
654 | { "return_path", vtype_stringptr, &return_path }, | |
655 | { "return_size_limit", vtype_int, &bounce_return_size_limit }, | |
181d9bf8 | 656 | { "router_name", vtype_stringptr, &router_name }, |
059ec3d9 PH |
657 | { "runrc", vtype_int, &runrc }, |
658 | { "self_hostname", vtype_stringptr, &self_hostname }, | |
659 | { "sender_address", vtype_stringptr, &sender_address }, | |
2a3eea10 | 660 | { "sender_address_data", vtype_stringptr, &sender_address_data }, |
059ec3d9 PH |
661 | { "sender_address_domain", vtype_domain, &sender_address }, |
662 | { "sender_address_local_part", vtype_localpart, &sender_address }, | |
663 | { "sender_data", vtype_stringptr, &sender_data }, | |
664 | { "sender_fullhost", vtype_stringptr, &sender_fullhost }, | |
1705dd20 | 665 | { "sender_helo_dnssec", vtype_bool, &sender_helo_dnssec }, |
059ec3d9 PH |
666 | { "sender_helo_name", vtype_stringptr, &sender_helo_name }, |
667 | { "sender_host_address", vtype_stringptr, &sender_host_address }, | |
668 | { "sender_host_authenticated",vtype_stringptr, &sender_host_authenticated }, | |
11d7e4fa | 669 | { "sender_host_dnssec", vtype_bool, &sender_host_dnssec }, |
059ec3d9 PH |
670 | { "sender_host_name", vtype_host_lookup, NULL }, |
671 | { "sender_host_port", vtype_int, &sender_host_port }, | |
672 | { "sender_ident", vtype_stringptr, &sender_ident }, | |
870f6ba8 TF |
673 | { "sender_rate", vtype_stringptr, &sender_rate }, |
674 | { "sender_rate_limit", vtype_stringptr, &sender_rate_limit }, | |
675 | { "sender_rate_period", vtype_stringptr, &sender_rate_period }, | |
059ec3d9 | 676 | { "sender_rcvhost", vtype_stringptr, &sender_rcvhost }, |
8e669ac1 | 677 | { "sender_verify_failure",vtype_stringptr, &sender_verify_failure }, |
41c7c167 PH |
678 | { "sending_ip_address", vtype_stringptr, &sending_ip_address }, |
679 | { "sending_port", vtype_int, &sending_port }, | |
8e669ac1 | 680 | { "smtp_active_hostname", vtype_stringptr, &smtp_active_hostname }, |
3ee512ff PH |
681 | { "smtp_command", vtype_stringptr, &smtp_cmd_buffer }, |
682 | { "smtp_command_argument", vtype_stringptr, &smtp_cmd_argument }, | |
a09f2942 | 683 | { "smtp_command_history", vtype_string_func, &smtp_cmd_hist }, |
b01dd148 | 684 | { "smtp_count_at_connection_start", vtype_int, &smtp_accept_count }, |
8f128379 | 685 | { "smtp_notquit_reason", vtype_stringptr, &smtp_notquit_reason }, |
059ec3d9 PH |
686 | { "sn0", vtype_filter_int, &filter_sn[0] }, |
687 | { "sn1", vtype_filter_int, &filter_sn[1] }, | |
688 | { "sn2", vtype_filter_int, &filter_sn[2] }, | |
689 | { "sn3", vtype_filter_int, &filter_sn[3] }, | |
690 | { "sn4", vtype_filter_int, &filter_sn[4] }, | |
691 | { "sn5", vtype_filter_int, &filter_sn[5] }, | |
692 | { "sn6", vtype_filter_int, &filter_sn[6] }, | |
693 | { "sn7", vtype_filter_int, &filter_sn[7] }, | |
694 | { "sn8", vtype_filter_int, &filter_sn[8] }, | |
695 | { "sn9", vtype_filter_int, &filter_sn[9] }, | |
8523533c | 696 | #ifdef WITH_CONTENT_SCAN |
c5f280e2 | 697 | { "spam_action", vtype_stringptr, &spam_action }, |
8523533c TK |
698 | { "spam_bar", vtype_stringptr, &spam_bar }, |
699 | { "spam_report", vtype_stringptr, &spam_report }, | |
700 | { "spam_score", vtype_stringptr, &spam_score }, | |
701 | { "spam_score_int", vtype_stringptr, &spam_score_int }, | |
702 | #endif | |
7952eef9 | 703 | #ifdef SUPPORT_SPF |
65a7d8c3 | 704 | { "spf_guess", vtype_stringptr, &spf_guess }, |
8523533c TK |
705 | { "spf_header_comment", vtype_stringptr, &spf_header_comment }, |
706 | { "spf_received", vtype_stringptr, &spf_received }, | |
707 | { "spf_result", vtype_stringptr, &spf_result }, | |
708 | { "spf_smtp_comment", vtype_stringptr, &spf_smtp_comment }, | |
709 | #endif | |
059ec3d9 | 710 | { "spool_directory", vtype_stringptr, &spool_directory }, |
5cb8cbc6 | 711 | { "spool_inodes", vtype_pinodes, (void *)TRUE }, |
8e669ac1 | 712 | { "spool_space", vtype_pspace, (void *)TRUE }, |
8523533c TK |
713 | #ifdef EXPERIMENTAL_SRS |
714 | { "srs_db_address", vtype_stringptr, &srs_db_address }, | |
715 | { "srs_db_key", vtype_stringptr, &srs_db_key }, | |
716 | { "srs_orig_recipient", vtype_stringptr, &srs_orig_recipient }, | |
717 | { "srs_orig_sender", vtype_stringptr, &srs_orig_sender }, | |
718 | { "srs_recipient", vtype_stringptr, &srs_recipient }, | |
719 | { "srs_status", vtype_stringptr, &srs_status }, | |
720 | #endif | |
059ec3d9 | 721 | { "thisaddress", vtype_stringptr, &filter_thisaddress }, |
817d9f57 | 722 | |
d9b2312b | 723 | /* The non-(in,out) variables are now deprecated */ |
817d9f57 JH |
724 | { "tls_bits", vtype_int, &tls_in.bits }, |
725 | { "tls_certificate_verified", vtype_int, &tls_in.certificate_verified }, | |
726 | { "tls_cipher", vtype_stringptr, &tls_in.cipher }, | |
d9b2312b JH |
727 | |
728 | { "tls_in_bits", vtype_int, &tls_in.bits }, | |
729 | { "tls_in_certificate_verified", vtype_int, &tls_in.certificate_verified }, | |
730 | { "tls_in_cipher", vtype_stringptr, &tls_in.cipher }, | |
44662487 | 731 | { "tls_in_ocsp", vtype_int, &tls_in.ocsp }, |
9d1c15ef JH |
732 | { "tls_in_ourcert", vtype_cert, &tls_in.ourcert }, |
733 | { "tls_in_peercert", vtype_cert, &tls_in.peercert }, | |
d9b2312b | 734 | { "tls_in_peerdn", vtype_stringptr, &tls_in.peerdn }, |
4b57b15d | 735 | #if defined(SUPPORT_TLS) |
d9b2312b JH |
736 | { "tls_in_sni", vtype_stringptr, &tls_in.sni }, |
737 | #endif | |
817d9f57 | 738 | { "tls_out_bits", vtype_int, &tls_out.bits }, |
cb9d95ae | 739 | { "tls_out_certificate_verified", vtype_int,&tls_out.certificate_verified }, |
817d9f57 | 740 | { "tls_out_cipher", vtype_stringptr, &tls_out.cipher }, |
594706ea JH |
741 | #ifdef EXPERIMENTAL_DANE |
742 | { "tls_out_dane", vtype_bool, &tls_out.dane_verified }, | |
743 | #endif | |
44662487 | 744 | { "tls_out_ocsp", vtype_int, &tls_out.ocsp }, |
9d1c15ef JH |
745 | { "tls_out_ourcert", vtype_cert, &tls_out.ourcert }, |
746 | { "tls_out_peercert", vtype_cert, &tls_out.peercert }, | |
817d9f57 | 747 | { "tls_out_peerdn", vtype_stringptr, &tls_out.peerdn }, |
4b57b15d | 748 | #if defined(SUPPORT_TLS) |
817d9f57 | 749 | { "tls_out_sni", vtype_stringptr, &tls_out.sni }, |
7be682ca | 750 | #endif |
594706ea JH |
751 | #ifdef EXPERIMENTAL_DANE |
752 | { "tls_out_tlsa_usage", vtype_int, &tls_out.tlsa_usage }, | |
753 | #endif | |
d9b2312b | 754 | |
613dd4ae | 755 | { "tls_peerdn", vtype_stringptr, &tls_in.peerdn }, /* mind the alphabetical order! */ |
4b57b15d | 756 | #if defined(SUPPORT_TLS) |
613dd4ae JH |
757 | { "tls_sni", vtype_stringptr, &tls_in.sni }, /* mind the alphabetical order! */ |
758 | #endif | |
817d9f57 | 759 | |
059ec3d9 PH |
760 | { "tod_bsdinbox", vtype_todbsdin, NULL }, |
761 | { "tod_epoch", vtype_tode, NULL }, | |
f5787926 | 762 | { "tod_epoch_l", vtype_todel, NULL }, |
059ec3d9 PH |
763 | { "tod_full", vtype_todf, NULL }, |
764 | { "tod_log", vtype_todl, NULL }, | |
765 | { "tod_logfile", vtype_todlf, NULL }, | |
766 | { "tod_zone", vtype_todzone, NULL }, | |
767 | { "tod_zulu", vtype_todzulu, NULL }, | |
181d9bf8 | 768 | { "transport_name", vtype_stringptr, &transport_name }, |
059ec3d9 | 769 | { "value", vtype_stringptr, &lookup_value }, |
aec45841 | 770 | { "verify_mode", vtype_stringptr, &verify_mode }, |
059ec3d9 PH |
771 | { "version_number", vtype_stringptr, &version_string }, |
772 | { "warn_message_delay", vtype_stringptr, &warnmsg_delay }, | |
773 | { "warn_message_recipient",vtype_stringptr, &warnmsg_recipients }, | |
774 | { "warn_message_recipients",vtype_stringptr,&warnmsg_recipients }, | |
775 | { "warnmsg_delay", vtype_stringptr, &warnmsg_delay }, | |
776 | { "warnmsg_recipient", vtype_stringptr, &warnmsg_recipients }, | |
777 | { "warnmsg_recipients", vtype_stringptr, &warnmsg_recipients } | |
778 | }; | |
779 | ||
0539a19d | 780 | static int var_table_size = nelem(var_table); |
059ec3d9 PH |
781 | static uschar var_buffer[256]; |
782 | static BOOL malformed_header; | |
783 | ||
784 | /* For textual hashes */ | |
785 | ||
1ba28e2b PP |
786 | static const char *hashcodes = "abcdefghijklmnopqrtsuvwxyz" |
787 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
788 | "0123456789"; | |
059ec3d9 PH |
789 | |
790 | enum { HMAC_MD5, HMAC_SHA1 }; | |
791 | ||
792 | /* For numeric hashes */ | |
793 | ||
794 | static unsigned int prime[] = { | |
795 | 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, | |
796 | 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, | |
797 | 73, 79, 83, 89, 97, 101, 103, 107, 109, 113}; | |
798 | ||
799 | /* For printing modes in symbolic form */ | |
800 | ||
801 | static uschar *mtable_normal[] = | |
802 | { US"---", US"--x", US"-w-", US"-wx", US"r--", US"r-x", US"rw-", US"rwx" }; | |
803 | ||
804 | static uschar *mtable_setid[] = | |
805 | { US"--S", US"--s", US"-wS", US"-ws", US"r-S", US"r-s", US"rwS", US"rws" }; | |
806 | ||
807 | static uschar *mtable_sticky[] = | |
808 | { US"--T", US"--t", US"-wT", US"-wt", US"r-T", US"r-t", US"rwT", US"rwt" }; | |
809 | ||
810 | ||
811 | ||
812 | /************************************************* | |
813 | * Tables for UTF-8 support * | |
814 | *************************************************/ | |
815 | ||
816 | /* Table of the number of extra characters, indexed by the first character | |
817 | masked with 0x3f. The highest number for a valid UTF-8 character is in fact | |
818 | 0x3d. */ | |
819 | ||
820 | static uschar utf8_table1[] = { | |
821 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
822 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
823 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, | |
824 | 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 }; | |
825 | ||
826 | /* These are the masks for the data bits in the first byte of a character, | |
827 | indexed by the number of additional bytes. */ | |
828 | ||
829 | static int utf8_table2[] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01}; | |
830 | ||
831 | /* Get the next UTF-8 character, advancing the pointer. */ | |
832 | ||
833 | #define GETUTF8INC(c, ptr) \ | |
834 | c = *ptr++; \ | |
835 | if ((c & 0xc0) == 0xc0) \ | |
836 | { \ | |
837 | int a = utf8_table1[c & 0x3f]; /* Number of additional bytes */ \ | |
838 | int s = 6*a; \ | |
839 | c = (c & utf8_table2[a]) << s; \ | |
840 | while (a-- > 0) \ | |
841 | { \ | |
842 | s -= 6; \ | |
843 | c |= (*ptr++ & 0x3f) << s; \ | |
844 | } \ | |
845 | } | |
846 | ||
847 | ||
03ca21f8 JH |
848 | |
849 | static uschar * base32_chars = US"abcdefghijklmnopqrstuvwxyz234567"; | |
850 | ||
059ec3d9 PH |
851 | /************************************************* |
852 | * Binary chop search on a table * | |
853 | *************************************************/ | |
854 | ||
855 | /* This is used for matching expansion items and operators. | |
856 | ||
857 | Arguments: | |
858 | name the name that is being sought | |
859 | table the table to search | |
860 | table_size the number of items in the table | |
861 | ||
862 | Returns: the offset in the table, or -1 | |
863 | */ | |
864 | ||
865 | static int | |
866 | chop_match(uschar *name, uschar **table, int table_size) | |
867 | { | |
868 | uschar **bot = table; | |
869 | uschar **top = table + table_size; | |
870 | ||
871 | while (top > bot) | |
872 | { | |
873 | uschar **mid = bot + (top - bot)/2; | |
874 | int c = Ustrcmp(name, *mid); | |
875 | if (c == 0) return mid - table; | |
876 | if (c > 0) bot = mid + 1; else top = mid; | |
877 | } | |
878 | ||
879 | return -1; | |
880 | } | |
881 | ||
882 | ||
883 | ||
884 | /************************************************* | |
885 | * Check a condition string * | |
886 | *************************************************/ | |
887 | ||
888 | /* This function is called to expand a string, and test the result for a "true" | |
889 | or "false" value. Failure of the expansion yields FALSE; logged unless it was a | |
be7a5781 JH |
890 | forced fail or lookup defer. |
891 | ||
892 | We used to release all store used, but this is not not safe due | |
893 | to ${dlfunc } and ${acl }. In any case expand_string_internal() | |
894 | is reasonably careful to release what it can. | |
059ec3d9 | 895 | |
6a8de854 PP |
896 | The actual false-value tests should be replicated for ECOND_BOOL_LAX. |
897 | ||
059ec3d9 PH |
898 | Arguments: |
899 | condition the condition string | |
900 | m1 text to be incorporated in panic error | |
901 | m2 ditto | |
902 | ||
903 | Returns: TRUE if condition is met, FALSE if not | |
904 | */ | |
905 | ||
906 | BOOL | |
907 | expand_check_condition(uschar *condition, uschar *m1, uschar *m2) | |
908 | { | |
909 | int rc; | |
059ec3d9 PH |
910 | uschar *ss = expand_string(condition); |
911 | if (ss == NULL) | |
912 | { | |
913 | if (!expand_string_forcedfail && !search_find_defer) | |
914 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand condition \"%s\" " | |
915 | "for %s %s: %s", condition, m1, m2, expand_string_message); | |
916 | return FALSE; | |
917 | } | |
918 | rc = ss[0] != 0 && Ustrcmp(ss, "0") != 0 && strcmpic(ss, US"no") != 0 && | |
919 | strcmpic(ss, US"false") != 0; | |
059ec3d9 PH |
920 | return rc; |
921 | } | |
922 | ||
923 | ||
924 | ||
17c76198 | 925 | |
9e3331ea TK |
926 | /************************************************* |
927 | * Pseudo-random number generation * | |
928 | *************************************************/ | |
929 | ||
930 | /* Pseudo-random number generation. The result is not "expected" to be | |
931 | cryptographically strong but not so weak that someone will shoot themselves | |
932 | in the foot using it as a nonce in some email header scheme or whatever | |
933 | weirdness they'll twist this into. The result should ideally handle fork(). | |
934 | ||
935 | However, if we're stuck unable to provide this, then we'll fall back to | |
936 | appallingly bad randomness. | |
937 | ||
17c76198 PP |
938 | If SUPPORT_TLS is defined then this will not be used except as an emergency |
939 | fallback. | |
9e3331ea TK |
940 | |
941 | Arguments: | |
942 | max range maximum | |
943 | Returns a random number in range [0, max-1] | |
944 | */ | |
945 | ||
17c76198 PP |
946 | #ifdef SUPPORT_TLS |
947 | # define vaguely_random_number vaguely_random_number_fallback | |
948 | #endif | |
9e3331ea | 949 | int |
17c76198 | 950 | vaguely_random_number(int max) |
9e3331ea | 951 | { |
17c76198 PP |
952 | #ifdef SUPPORT_TLS |
953 | # undef vaguely_random_number | |
954 | #endif | |
9e3331ea TK |
955 | static pid_t pid = 0; |
956 | pid_t p2; | |
957 | #if defined(HAVE_SRANDOM) && !defined(HAVE_SRANDOMDEV) | |
958 | struct timeval tv; | |
959 | #endif | |
960 | ||
961 | p2 = getpid(); | |
962 | if (p2 != pid) | |
963 | { | |
964 | if (pid != 0) | |
965 | { | |
966 | ||
967 | #ifdef HAVE_ARC4RANDOM | |
968 | /* cryptographically strong randomness, common on *BSD platforms, not | |
969 | so much elsewhere. Alas. */ | |
46ca7017 | 970 | #ifndef NOT_HAVE_ARC4RANDOM_STIR |
9e3331ea | 971 | arc4random_stir(); |
46ca7017 | 972 | #endif |
9e3331ea TK |
973 | #elif defined(HAVE_SRANDOM) || defined(HAVE_SRANDOMDEV) |
974 | #ifdef HAVE_SRANDOMDEV | |
975 | /* uses random(4) for seeding */ | |
976 | srandomdev(); | |
977 | #else | |
978 | gettimeofday(&tv, NULL); | |
979 | srandom(tv.tv_sec | tv.tv_usec | getpid()); | |
980 | #endif | |
981 | #else | |
982 | /* Poor randomness and no seeding here */ | |
983 | #endif | |
984 | ||
985 | } | |
986 | pid = p2; | |
987 | } | |
988 | ||
989 | #ifdef HAVE_ARC4RANDOM | |
990 | return arc4random() % max; | |
991 | #elif defined(HAVE_SRANDOM) || defined(HAVE_SRANDOMDEV) | |
992 | return random() % max; | |
993 | #else | |
994 | /* This one returns a 16-bit number, definitely not crypto-strong */ | |
995 | return random_number(max); | |
996 | #endif | |
997 | } | |
998 | ||
17c76198 PP |
999 | |
1000 | ||
9e3331ea | 1001 | |
059ec3d9 PH |
1002 | /************************************************* |
1003 | * Pick out a name from a string * | |
1004 | *************************************************/ | |
1005 | ||
1006 | /* If the name is too long, it is silently truncated. | |
1007 | ||
1008 | Arguments: | |
1009 | name points to a buffer into which to put the name | |
1010 | max is the length of the buffer | |
1011 | s points to the first alphabetic character of the name | |
1012 | extras chars other than alphanumerics to permit | |
1013 | ||
1014 | Returns: pointer to the first character after the name | |
1015 | ||
1016 | Note: The test for *s != 0 in the while loop is necessary because | |
1017 | Ustrchr() yields non-NULL if the character is zero (which is not something | |
1018 | I expected). */ | |
1019 | ||
55414b25 JH |
1020 | static const uschar * |
1021 | read_name(uschar *name, int max, const uschar *s, uschar *extras) | |
059ec3d9 PH |
1022 | { |
1023 | int ptr = 0; | |
1024 | while (*s != 0 && (isalnum(*s) || Ustrchr(extras, *s) != NULL)) | |
1025 | { | |
1026 | if (ptr < max-1) name[ptr++] = *s; | |
1027 | s++; | |
1028 | } | |
1029 | name[ptr] = 0; | |
1030 | return s; | |
1031 | } | |
1032 | ||
1033 | ||
1034 | ||
1035 | /************************************************* | |
1036 | * Pick out the rest of a header name * | |
1037 | *************************************************/ | |
1038 | ||
1039 | /* A variable name starting $header_ (or just $h_ for those who like | |
1040 | abbreviations) might not be the complete header name because headers can | |
1041 | contain any printing characters in their names, except ':'. This function is | |
1042 | called to read the rest of the name, chop h[eader]_ off the front, and put ':' | |
1043 | on the end, if the name was terminated by white space. | |
1044 | ||
1045 | Arguments: | |
1046 | name points to a buffer in which the name read so far exists | |
1047 | max is the length of the buffer | |
1048 | s points to the first character after the name so far, i.e. the | |
1049 | first non-alphameric character after $header_xxxxx | |
1050 | ||
1051 | Returns: a pointer to the first character after the header name | |
1052 | */ | |
1053 | ||
55414b25 JH |
1054 | static const uschar * |
1055 | read_header_name(uschar *name, int max, const uschar *s) | |
059ec3d9 PH |
1056 | { |
1057 | int prelen = Ustrchr(name, '_') - name + 1; | |
1058 | int ptr = Ustrlen(name) - prelen; | |
1059 | if (ptr > 0) memmove(name, name+prelen, ptr); | |
1060 | while (mac_isgraph(*s) && *s != ':') | |
1061 | { | |
1062 | if (ptr < max-1) name[ptr++] = *s; | |
1063 | s++; | |
1064 | } | |
1065 | if (*s == ':') s++; | |
1066 | name[ptr++] = ':'; | |
1067 | name[ptr] = 0; | |
1068 | return s; | |
1069 | } | |
1070 | ||
1071 | ||
1072 | ||
1073 | /************************************************* | |
1074 | * Pick out a number from a string * | |
1075 | *************************************************/ | |
1076 | ||
1077 | /* Arguments: | |
1078 | n points to an integer into which to put the number | |
1079 | s points to the first digit of the number | |
1080 | ||
1081 | Returns: a pointer to the character after the last digit | |
1082 | */ | |
13559da6 JH |
1083 | /*XXX consider expanding to int_eximarith_t. But the test for |
1084 | "overbig numbers" in 0002 still needs to overflow it. */ | |
059ec3d9 PH |
1085 | |
1086 | static uschar * | |
1087 | read_number(int *n, uschar *s) | |
1088 | { | |
1089 | *n = 0; | |
1090 | while (isdigit(*s)) *n = *n * 10 + (*s++ - '0'); | |
1091 | return s; | |
1092 | } | |
1093 | ||
55414b25 JH |
1094 | static const uschar * |
1095 | read_cnumber(int *n, const uschar *s) | |
1096 | { | |
1097 | *n = 0; | |
1098 | while (isdigit(*s)) *n = *n * 10 + (*s++ - '0'); | |
1099 | return s; | |
1100 | } | |
1101 | ||
059ec3d9 PH |
1102 | |
1103 | ||
1104 | /************************************************* | |
1105 | * Extract keyed subfield from a string * | |
1106 | *************************************************/ | |
1107 | ||
1108 | /* The yield is in dynamic store; NULL means that the key was not found. | |
1109 | ||
1110 | Arguments: | |
1111 | key points to the name of the key | |
1112 | s points to the string from which to extract the subfield | |
1113 | ||
1114 | Returns: NULL if the subfield was not found, or | |
1115 | a pointer to the subfield's data | |
1116 | */ | |
1117 | ||
1118 | static uschar * | |
55414b25 | 1119 | expand_getkeyed(uschar *key, const uschar *s) |
059ec3d9 PH |
1120 | { |
1121 | int length = Ustrlen(key); | |
1122 | while (isspace(*s)) s++; | |
1123 | ||
1124 | /* Loop to search for the key */ | |
1125 | ||
1126 | while (*s != 0) | |
1127 | { | |
1128 | int dkeylength; | |
1129 | uschar *data; | |
55414b25 | 1130 | const uschar *dkey = s; |
059ec3d9 PH |
1131 | |
1132 | while (*s != 0 && *s != '=' && !isspace(*s)) s++; | |
1133 | dkeylength = s - dkey; | |
1134 | while (isspace(*s)) s++; | |
1135 | if (*s == '=') while (isspace((*(++s)))); | |
1136 | ||
1137 | data = string_dequote(&s); | |
1138 | if (length == dkeylength && strncmpic(key, dkey, length) == 0) | |
1139 | return data; | |
1140 | ||
1141 | while (isspace(*s)) s++; | |
1142 | } | |
1143 | ||
1144 | return NULL; | |
1145 | } | |
1146 | ||
1147 | ||
1148 | ||
9d1c15ef JH |
1149 | static var_entry * |
1150 | find_var_ent(uschar * name) | |
1151 | { | |
1152 | int first = 0; | |
1153 | int last = var_table_size; | |
1154 | ||
1155 | while (last > first) | |
1156 | { | |
1157 | int middle = (first + last)/2; | |
1158 | int c = Ustrcmp(name, var_table[middle].name); | |
1159 | ||
1160 | if (c > 0) { first = middle + 1; continue; } | |
1161 | if (c < 0) { last = middle; continue; } | |
1162 | return &var_table[middle]; | |
1163 | } | |
1164 | return NULL; | |
1165 | } | |
059ec3d9 PH |
1166 | |
1167 | /************************************************* | |
1168 | * Extract numbered subfield from string * | |
1169 | *************************************************/ | |
1170 | ||
1171 | /* Extracts a numbered field from a string that is divided by tokens - for | |
1172 | example a line from /etc/passwd is divided by colon characters. First field is | |
1173 | numbered one. Negative arguments count from the right. Zero returns the whole | |
1174 | string. Returns NULL if there are insufficient tokens in the string | |
1175 | ||
1176 | ***WARNING*** | |
1177 | Modifies final argument - this is a dynamically generated string, so that's OK. | |
1178 | ||
1179 | Arguments: | |
1180 | field number of field to be extracted, | |
1181 | first field = 1, whole string = 0, last field = -1 | |
1182 | separators characters that are used to break string into tokens | |
1183 | s points to the string from which to extract the subfield | |
1184 | ||
1185 | Returns: NULL if the field was not found, | |
1186 | a pointer to the field's data inside s (modified to add 0) | |
1187 | */ | |
1188 | ||
1189 | static uschar * | |
1190 | expand_gettokened (int field, uschar *separators, uschar *s) | |
1191 | { | |
1192 | int sep = 1; | |
1193 | int count; | |
1194 | uschar *ss = s; | |
1195 | uschar *fieldtext = NULL; | |
1196 | ||
1197 | if (field == 0) return s; | |
1198 | ||
1199 | /* Break the line up into fields in place; for field > 0 we stop when we have | |
1200 | done the number of fields we want. For field < 0 we continue till the end of | |
1201 | the string, counting the number of fields. */ | |
1202 | ||
1203 | count = (field > 0)? field : INT_MAX; | |
1204 | ||
1205 | while (count-- > 0) | |
1206 | { | |
1207 | size_t len; | |
1208 | ||
1209 | /* Previous field was the last one in the string. For a positive field | |
1210 | number, this means there are not enough fields. For a negative field number, | |
1211 | check that there are enough, and scan back to find the one that is wanted. */ | |
1212 | ||
1213 | if (sep == 0) | |
1214 | { | |
1215 | if (field > 0 || (-field) > (INT_MAX - count - 1)) return NULL; | |
1216 | if ((-field) == (INT_MAX - count - 1)) return s; | |
1217 | while (field++ < 0) | |
1218 | { | |
1219 | ss--; | |
1220 | while (ss[-1] != 0) ss--; | |
1221 | } | |
1222 | fieldtext = ss; | |
1223 | break; | |
1224 | } | |
1225 | ||
1226 | /* Previous field was not last in the string; save its start and put a | |
1227 | zero at its end. */ | |
1228 | ||
1229 | fieldtext = ss; | |
1230 | len = Ustrcspn(ss, separators); | |
1231 | sep = ss[len]; | |
1232 | ss[len] = 0; | |
1233 | ss += len + 1; | |
1234 | } | |
1235 | ||
1236 | return fieldtext; | |
1237 | } | |
1238 | ||
1239 | ||
aa26e137 | 1240 | static uschar * |
55414b25 | 1241 | expand_getlistele(int field, const uschar * list) |
aa26e137 | 1242 | { |
55414b25 | 1243 | const uschar * tlist= list; |
aa26e137 JH |
1244 | int sep= 0; |
1245 | uschar dummy; | |
1246 | ||
1247 | if(field<0) | |
0f0c8159 | 1248 | { |
aa26e137 JH |
1249 | for(field++; string_nextinlist(&tlist, &sep, &dummy, 1); ) field++; |
1250 | sep= 0; | |
0f0c8159 | 1251 | } |
aa26e137 JH |
1252 | if(field==0) return NULL; |
1253 | while(--field>0 && (string_nextinlist(&list, &sep, &dummy, 1))) ; | |
1254 | return string_nextinlist(&list, &sep, NULL, 0); | |
1255 | } | |
059ec3d9 | 1256 | |
9d1c15ef JH |
1257 | |
1258 | /* Certificate fields, by name. Worry about by-OID later */ | |
9e4dddbd | 1259 | /* Names are chosen to not have common prefixes */ |
9d1c15ef JH |
1260 | |
1261 | #ifdef SUPPORT_TLS | |
1262 | typedef struct | |
1263 | { | |
1264 | uschar * name; | |
9e4dddbd JH |
1265 | int namelen; |
1266 | uschar * (*getfn)(void * cert, uschar * mod); | |
9d1c15ef JH |
1267 | } certfield; |
1268 | static certfield certfields[] = | |
1269 | { /* linear search; no special order */ | |
9e4dddbd JH |
1270 | { US"version", 7, &tls_cert_version }, |
1271 | { US"serial_number", 13, &tls_cert_serial_number }, | |
1272 | { US"subject", 7, &tls_cert_subject }, | |
1273 | { US"notbefore", 9, &tls_cert_not_before }, | |
1274 | { US"notafter", 8, &tls_cert_not_after }, | |
1275 | { US"issuer", 6, &tls_cert_issuer }, | |
1276 | { US"signature", 9, &tls_cert_signature }, | |
1277 | { US"sig_algorithm", 13, &tls_cert_signature_algorithm }, | |
1278 | { US"subj_altname", 12, &tls_cert_subject_altname }, | |
1279 | { US"ocsp_uri", 8, &tls_cert_ocsp_uri }, | |
1280 | { US"crl_uri", 7, &tls_cert_crl_uri }, | |
9d1c15ef JH |
1281 | }; |
1282 | ||
1283 | static uschar * | |
1284 | expand_getcertele(uschar * field, uschar * certvar) | |
1285 | { | |
1286 | var_entry * vp; | |
1287 | certfield * cp; | |
1288 | ||
1289 | if (!(vp = find_var_ent(certvar))) | |
1290 | { | |
94431adb | 1291 | expand_string_message = |
9d1c15ef JH |
1292 | string_sprintf("no variable named \"%s\"", certvar); |
1293 | return NULL; /* Unknown variable name */ | |
1294 | } | |
1295 | /* NB this stops us passing certs around in variable. Might | |
1296 | want to do that in future */ | |
1297 | if (vp->type != vtype_cert) | |
1298 | { | |
94431adb | 1299 | expand_string_message = |
9d1c15ef JH |
1300 | string_sprintf("\"%s\" is not a certificate", certvar); |
1301 | return NULL; /* Unknown variable name */ | |
1302 | } | |
1303 | if (!*(void **)vp->value) | |
1304 | return NULL; | |
1305 | ||
1306 | if (*field >= '0' && *field <= '9') | |
1307 | return tls_cert_ext_by_oid(*(void **)vp->value, field, 0); | |
1308 | ||
1309 | for(cp = certfields; | |
0539a19d | 1310 | cp < certfields + nelem(certfields); |
9d1c15ef | 1311 | cp++) |
9e4dddbd JH |
1312 | if (Ustrncmp(cp->name, field, cp->namelen) == 0) |
1313 | { | |
1314 | uschar * modifier = *(field += cp->namelen) == ',' | |
1315 | ? ++field : NULL; | |
1316 | return (*cp->getfn)( *(void **)vp->value, modifier ); | |
1317 | } | |
9d1c15ef | 1318 | |
94431adb | 1319 | expand_string_message = |
9d1c15ef JH |
1320 | string_sprintf("bad field selector \"%s\" for certextract", field); |
1321 | return NULL; | |
1322 | } | |
1323 | #endif /*SUPPORT_TLS*/ | |
1324 | ||
059ec3d9 PH |
1325 | /************************************************* |
1326 | * Extract a substring from a string * | |
1327 | *************************************************/ | |
1328 | ||
1329 | /* Perform the ${substr or ${length expansion operations. | |
1330 | ||
1331 | Arguments: | |
1332 | subject the input string | |
1333 | value1 the offset from the start of the input string to the start of | |
1334 | the output string; if negative, count from the right. | |
1335 | value2 the length of the output string, or negative (-1) for unset | |
1336 | if value1 is positive, unset means "all after" | |
1337 | if value1 is negative, unset means "all before" | |
1338 | len set to the length of the returned string | |
1339 | ||
1340 | Returns: pointer to the output string, or NULL if there is an error | |
1341 | */ | |
1342 | ||
1343 | static uschar * | |
1344 | extract_substr(uschar *subject, int value1, int value2, int *len) | |
1345 | { | |
1346 | int sublen = Ustrlen(subject); | |
1347 | ||
1348 | if (value1 < 0) /* count from right */ | |
1349 | { | |
1350 | value1 += sublen; | |
1351 | ||
1352 | /* If the position is before the start, skip to the start, and adjust the | |
1353 | length. If the length ends up negative, the substring is null because nothing | |
1354 | can precede. This falls out naturally when the length is unset, meaning "all | |
1355 | to the left". */ | |
1356 | ||
1357 | if (value1 < 0) | |
1358 | { | |
1359 | value2 += value1; | |
1360 | if (value2 < 0) value2 = 0; | |
1361 | value1 = 0; | |
1362 | } | |
1363 | ||
1364 | /* Otherwise an unset length => characters before value1 */ | |
1365 | ||
1366 | else if (value2 < 0) | |
1367 | { | |
1368 | value2 = value1; | |
1369 | value1 = 0; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | /* For a non-negative offset, if the starting position is past the end of the | |
1374 | string, the result will be the null string. Otherwise, an unset length means | |
1375 | "rest"; just set it to the maximum - it will be cut down below if necessary. */ | |
1376 | ||
1377 | else | |
1378 | { | |
1379 | if (value1 > sublen) | |
1380 | { | |
1381 | value1 = sublen; | |
1382 | value2 = 0; | |
1383 | } | |
1384 | else if (value2 < 0) value2 = sublen; | |
1385 | } | |
1386 | ||
1387 | /* Cut the length down to the maximum possible for the offset value, and get | |
1388 | the required characters. */ | |
1389 | ||
1390 | if (value1 + value2 > sublen) value2 = sublen - value1; | |
1391 | *len = value2; | |
1392 | return subject + value1; | |
1393 | } | |
1394 | ||
1395 | ||
1396 | ||
1397 | ||
1398 | /************************************************* | |
1399 | * Old-style hash of a string * | |
1400 | *************************************************/ | |
1401 | ||
1402 | /* Perform the ${hash expansion operation. | |
1403 | ||
1404 | Arguments: | |
1405 | subject the input string (an expanded substring) | |
1406 | value1 the length of the output string; if greater or equal to the | |
1407 | length of the input string, the input string is returned | |
1408 | value2 the number of hash characters to use, or 26 if negative | |
1409 | len set to the length of the returned string | |
1410 | ||
1411 | Returns: pointer to the output string, or NULL if there is an error | |
1412 | */ | |
1413 | ||
1414 | static uschar * | |
1415 | compute_hash(uschar *subject, int value1, int value2, int *len) | |
1416 | { | |
1417 | int sublen = Ustrlen(subject); | |
1418 | ||
1419 | if (value2 < 0) value2 = 26; | |
1420 | else if (value2 > Ustrlen(hashcodes)) | |
1421 | { | |
1422 | expand_string_message = | |
1423 | string_sprintf("hash count \"%d\" too big", value2); | |
1424 | return NULL; | |
1425 | } | |
1426 | ||
1427 | /* Calculate the hash text. We know it is shorter than the original string, so | |
1428 | can safely place it in subject[] (we know that subject is always itself an | |
1429 | expanded substring). */ | |
1430 | ||
1431 | if (value1 < sublen) | |
1432 | { | |
1433 | int c; | |
1434 | int i = 0; | |
1435 | int j = value1; | |
1436 | while ((c = (subject[j])) != 0) | |
1437 | { | |
1438 | int shift = (c + j++) & 7; | |
1439 | subject[i] ^= (c << shift) | (c >> (8-shift)); | |
1440 | if (++i >= value1) i = 0; | |
1441 | } | |
1442 | for (i = 0; i < value1; i++) | |
1443 | subject[i] = hashcodes[(subject[i]) % value2]; | |
1444 | } | |
1445 | else value1 = sublen; | |
1446 | ||
1447 | *len = value1; | |
1448 | return subject; | |
1449 | } | |
1450 | ||
1451 | ||
1452 | ||
1453 | ||
1454 | /************************************************* | |
1455 | * Numeric hash of a string * | |
1456 | *************************************************/ | |
1457 | ||
1458 | /* Perform the ${nhash expansion operation. The first characters of the | |
1459 | string are treated as most important, and get the highest prime numbers. | |
1460 | ||
1461 | Arguments: | |
1462 | subject the input string | |
1463 | value1 the maximum value of the first part of the result | |
1464 | value2 the maximum value of the second part of the result, | |
1465 | or negative to produce only a one-part result | |
1466 | len set to the length of the returned string | |
1467 | ||
1468 | Returns: pointer to the output string, or NULL if there is an error. | |
1469 | */ | |
1470 | ||
1471 | static uschar * | |
1472 | compute_nhash (uschar *subject, int value1, int value2, int *len) | |
1473 | { | |
1474 | uschar *s = subject; | |
1475 | int i = 0; | |
1476 | unsigned long int total = 0; /* no overflow */ | |
1477 | ||
1478 | while (*s != 0) | |
1479 | { | |
0539a19d | 1480 | if (i == 0) i = nelem(prime) - 1; |
059ec3d9 PH |
1481 | total += prime[i--] * (unsigned int)(*s++); |
1482 | } | |
1483 | ||
1484 | /* If value2 is unset, just compute one number */ | |
1485 | ||
1486 | if (value2 < 0) | |
bb07bcd3 | 1487 | s = string_sprintf("%lu", total % value1); |
059ec3d9 PH |
1488 | |
1489 | /* Otherwise do a div/mod hash */ | |
1490 | ||
1491 | else | |
1492 | { | |
1493 | total = total % (value1 * value2); | |
bb07bcd3 | 1494 | s = string_sprintf("%lu/%lu", total/value2, total % value2); |
059ec3d9 PH |
1495 | } |
1496 | ||
1497 | *len = Ustrlen(s); | |
1498 | return s; | |
1499 | } | |
1500 | ||
1501 | ||
1502 | ||
1503 | ||
1504 | ||
1505 | /************************************************* | |
1506 | * Find the value of a header or headers * | |
1507 | *************************************************/ | |
1508 | ||
1509 | /* Multiple instances of the same header get concatenated, and this function | |
1510 | can also return a concatenation of all the header lines. When concatenating | |
1511 | specific headers that contain lists of addresses, a comma is inserted between | |
1512 | them. Otherwise we use a straight concatenation. Because some messages can have | |
1513 | pathologically large number of lines, there is a limit on the length that is | |
1514 | returned. Also, to avoid massive store use which would result from using | |
1515 | string_cat() as it copies and extends strings, we do a preliminary pass to find | |
1516 | out exactly how much store will be needed. On "normal" messages this will be | |
1517 | pretty trivial. | |
1518 | ||
1519 | Arguments: | |
1520 | name the name of the header, without the leading $header_ or $h_, | |
1521 | or NULL if a concatenation of all headers is required | |
1522 | exists_only TRUE if called from a def: test; don't need to build a string; | |
1523 | just return a string that is not "" and not "0" if the header | |
1524 | exists | |
1525 | newsize return the size of memory block that was obtained; may be NULL | |
1526 | if exists_only is TRUE | |
1527 | want_raw TRUE if called for $rh_ or $rheader_ variables; no processing, | |
ff75a1f7 PH |
1528 | other than concatenating, will be done on the header. Also used |
1529 | for $message_headers_raw. | |
059ec3d9 PH |
1530 | charset name of charset to translate MIME words to; used only if |
1531 | want_raw is false; if NULL, no translation is done (this is | |
1532 | used for $bh_ and $bheader_) | |
1533 | ||
1534 | Returns: NULL if the header does not exist, else a pointer to a new | |
1535 | store block | |
1536 | */ | |
1537 | ||
1538 | static uschar * | |
1539 | find_header(uschar *name, BOOL exists_only, int *newsize, BOOL want_raw, | |
1540 | uschar *charset) | |
1541 | { | |
1542 | BOOL found = name == NULL; | |
1543 | int comma = 0; | |
1544 | int len = found? 0 : Ustrlen(name); | |
1545 | int i; | |
1546 | uschar *yield = NULL; | |
1547 | uschar *ptr = NULL; | |
1548 | ||
1549 | /* Loop for two passes - saves code repetition */ | |
1550 | ||
1551 | for (i = 0; i < 2; i++) | |
1552 | { | |
1553 | int size = 0; | |
1554 | header_line *h; | |
1555 | ||
f4bb363f JH |
1556 | for (h = header_list; size < header_insert_maxlen && h; h = h->next) |
1557 | if (h->type != htype_old && h->text) /* NULL => Received: placeholder */ | |
1558 | if (!name || (len <= h->slen && strncmpic(name, h->text, len) == 0)) | |
059ec3d9 PH |
1559 | { |
1560 | int ilen; | |
1561 | uschar *t; | |
1562 | ||
1563 | if (exists_only) return US"1"; /* don't need actual string */ | |
1564 | found = TRUE; | |
1565 | t = h->text + len; /* text to insert */ | |
1566 | if (!want_raw) /* unless wanted raw, */ | |
1567 | while (isspace(*t)) t++; /* remove leading white space */ | |
1568 | ilen = h->slen - (t - h->text); /* length to insert */ | |
1569 | ||
fd700877 PH |
1570 | /* Unless wanted raw, remove trailing whitespace, including the |
1571 | newline. */ | |
1572 | ||
1573 | if (!want_raw) | |
1574 | while (ilen > 0 && isspace(t[ilen-1])) ilen--; | |
1575 | ||
059ec3d9 PH |
1576 | /* Set comma = 1 if handling a single header and it's one of those |
1577 | that contains an address list, except when asked for raw headers. Only | |
1578 | need to do this once. */ | |
1579 | ||
f4bb363f | 1580 | if (!want_raw && name && comma == 0 && |
059ec3d9 PH |
1581 | Ustrchr("BCFRST", h->type) != NULL) |
1582 | comma = 1; | |
1583 | ||
1584 | /* First pass - compute total store needed; second pass - compute | |
1585 | total store used, including this header. */ | |
1586 | ||
fd700877 | 1587 | size += ilen + comma + 1; /* +1 for the newline */ |
059ec3d9 | 1588 | |
4c04137d | 1589 | /* Second pass - concatenate the data, up to a maximum. Note that |
059ec3d9 PH |
1590 | the loop stops when size hits the limit. */ |
1591 | ||
1592 | if (i != 0) | |
1593 | { | |
1594 | if (size > header_insert_maxlen) | |
1595 | { | |
fd700877 | 1596 | ilen -= size - header_insert_maxlen - 1; |
059ec3d9 PH |
1597 | comma = 0; |
1598 | } | |
1599 | Ustrncpy(ptr, t, ilen); | |
1600 | ptr += ilen; | |
fd700877 PH |
1601 | |
1602 | /* For a non-raw header, put in the comma if needed, then add | |
3168332a PH |
1603 | back the newline we removed above, provided there was some text in |
1604 | the header. */ | |
fd700877 | 1605 | |
3168332a | 1606 | if (!want_raw && ilen > 0) |
059ec3d9 | 1607 | { |
3168332a | 1608 | if (comma != 0) *ptr++ = ','; |
059ec3d9 PH |
1609 | *ptr++ = '\n'; |
1610 | } | |
1611 | } | |
1612 | } | |
059ec3d9 | 1613 | |
fd700877 PH |
1614 | /* At end of first pass, return NULL if no header found. Then truncate size |
1615 | if necessary, and get the buffer to hold the data, returning the buffer size. | |
1616 | */ | |
059ec3d9 PH |
1617 | |
1618 | if (i == 0) | |
1619 | { | |
1620 | if (!found) return NULL; | |
1621 | if (size > header_insert_maxlen) size = header_insert_maxlen; | |
1622 | *newsize = size + 1; | |
1623 | ptr = yield = store_get(*newsize); | |
1624 | } | |
1625 | } | |
1626 | ||
059ec3d9 PH |
1627 | /* That's all we do for raw header expansion. */ |
1628 | ||
1629 | if (want_raw) | |
059ec3d9 | 1630 | *ptr = 0; |
059ec3d9 | 1631 | |
fd700877 PH |
1632 | /* Otherwise, remove a final newline and a redundant added comma. Then we do |
1633 | RFC 2047 decoding, translating the charset if requested. The rfc2047_decode2() | |
059ec3d9 PH |
1634 | function can return an error with decoded data if the charset translation |
1635 | fails. If decoding fails, it returns NULL. */ | |
1636 | ||
1637 | else | |
1638 | { | |
1639 | uschar *decoded, *error; | |
3168332a | 1640 | if (ptr > yield && ptr[-1] == '\n') ptr--; |
fd700877 | 1641 | if (ptr > yield && comma != 0 && ptr[-1] == ',') ptr--; |
059ec3d9 | 1642 | *ptr = 0; |
a0d6ba8a PH |
1643 | decoded = rfc2047_decode2(yield, check_rfc2047_length, charset, '?', NULL, |
1644 | newsize, &error); | |
059ec3d9 PH |
1645 | if (error != NULL) |
1646 | { | |
1647 | DEBUG(D_any) debug_printf("*** error in RFC 2047 decoding: %s\n" | |
1648 | " input was: %s\n", error, yield); | |
1649 | } | |
1650 | if (decoded != NULL) yield = decoded; | |
1651 | } | |
1652 | ||
1653 | return yield; | |
1654 | } | |
1655 | ||
1656 | ||
1657 | ||
1658 | ||
362145b5 JH |
1659 | /************************************************* |
1660 | * Return list of recipients * | |
1661 | *************************************************/ | |
1662 | /* A recipients list is available only during system message filtering, | |
1663 | during ACL processing after DATA, and while expanding pipe commands | |
1664 | generated from a system filter, but not elsewhere. */ | |
1665 | ||
1666 | static uschar * | |
1667 | fn_recipients(void) | |
1668 | { | |
acec9514 JH |
1669 | gstring * g = NULL; |
1670 | int i; | |
1671 | ||
1672 | if (!enable_dollar_recipients) return NULL; | |
1673 | ||
1674 | for (i = 0; i < recipients_count; i++) | |
362145b5 | 1675 | { |
acec9514 JH |
1676 | /*XXX variant of list_appendele? */ |
1677 | if (i != 0) g = string_catn(g, US", ", 2); | |
1678 | g = string_cat(g, recipients_list[i].address); | |
362145b5 | 1679 | } |
acec9514 | 1680 | return string_from_gstring(g); |
362145b5 JH |
1681 | } |
1682 | ||
1683 | ||
059ec3d9 PH |
1684 | /************************************************* |
1685 | * Find value of a variable * | |
1686 | *************************************************/ | |
1687 | ||
1688 | /* The table of variables is kept in alphabetic order, so we can search it | |
1689 | using a binary chop. The "choplen" variable is nothing to do with the binary | |
1690 | chop. | |
1691 | ||
1692 | Arguments: | |
1693 | name the name of the variable being sought | |
1694 | exists_only TRUE if this is a def: test; passed on to find_header() | |
1695 | skipping TRUE => skip any processing evaluation; this is not the same as | |
1696 | exists_only because def: may test for values that are first | |
1697 | evaluated here | |
1698 | newsize pointer to an int which is initially zero; if the answer is in | |
1699 | a new memory buffer, *newsize is set to its size | |
1700 | ||
1701 | Returns: NULL if the variable does not exist, or | |
1702 | a pointer to the variable's contents, or | |
1703 | something non-NULL if exists_only is TRUE | |
1704 | */ | |
1705 | ||
1706 | static uschar * | |
1707 | find_variable(uschar *name, BOOL exists_only, BOOL skipping, int *newsize) | |
1708 | { | |
9d1c15ef JH |
1709 | var_entry * vp; |
1710 | uschar *s, *domain; | |
1711 | uschar **ss; | |
1712 | void * val; | |
059ec3d9 | 1713 | |
38a0a95f PH |
1714 | /* Handle ACL variables, whose names are of the form acl_cxxx or acl_mxxx. |
1715 | Originally, xxx had to be a number in the range 0-9 (later 0-19), but from | |
1716 | release 4.64 onwards arbitrary names are permitted, as long as the first 5 | |
641cb756 PH |
1717 | characters are acl_c or acl_m and the sixth is either a digit or an underscore |
1718 | (this gave backwards compatibility at the changeover). There may be built-in | |
1719 | variables whose names start acl_ but they should never start in this way. This | |
1720 | slightly messy specification is a consequence of the history, needless to say. | |
47ca6d6c | 1721 | |
38a0a95f PH |
1722 | If an ACL variable does not exist, treat it as empty, unless strict_acl_vars is |
1723 | set, in which case give an error. */ | |
47ca6d6c | 1724 | |
641cb756 PH |
1725 | if ((Ustrncmp(name, "acl_c", 5) == 0 || Ustrncmp(name, "acl_m", 5) == 0) && |
1726 | !isalpha(name[5])) | |
38a0a95f PH |
1727 | { |
1728 | tree_node *node = | |
1729 | tree_search((name[4] == 'c')? acl_var_c : acl_var_m, name + 4); | |
63df3f26 | 1730 | return node ? node->data.ptr : strict_acl_vars ? NULL : US""; |
47ca6d6c PH |
1731 | } |
1732 | ||
38a0a95f | 1733 | /* Handle $auth<n> variables. */ |
f78eb7c6 PH |
1734 | |
1735 | if (Ustrncmp(name, "auth", 4) == 0) | |
1736 | { | |
1737 | uschar *endptr; | |
1738 | int n = Ustrtoul(name + 4, &endptr, 10); | |
1739 | if (*endptr == 0 && n != 0 && n <= AUTH_VARS) | |
f38917cc JH |
1740 | return !auth_vars[n-1] ? US"" : auth_vars[n-1]; |
1741 | } | |
1742 | else if (Ustrncmp(name, "regex", 5) == 0) | |
1743 | { | |
1744 | uschar *endptr; | |
1745 | int n = Ustrtoul(name + 5, &endptr, 10); | |
1746 | if (*endptr == 0 && n != 0 && n <= REGEX_VARS) | |
1747 | return !regex_vars[n-1] ? US"" : regex_vars[n-1]; | |
f78eb7c6 PH |
1748 | } |
1749 | ||
47ca6d6c PH |
1750 | /* For all other variables, search the table */ |
1751 | ||
9d1c15ef JH |
1752 | if (!(vp = find_var_ent(name))) |
1753 | return NULL; /* Unknown variable name */ | |
059ec3d9 | 1754 | |
9d1c15ef JH |
1755 | /* Found an existing variable. If in skipping state, the value isn't needed, |
1756 | and we want to avoid processing (such as looking up the host name). */ | |
059ec3d9 | 1757 | |
9d1c15ef JH |
1758 | if (skipping) |
1759 | return US""; | |
059ec3d9 | 1760 | |
9d1c15ef JH |
1761 | val = vp->value; |
1762 | switch (vp->type) | |
1763 | { | |
1764 | case vtype_filter_int: | |
63df3f26 JH |
1765 | if (!filter_running) return NULL; |
1766 | /* Fall through */ | |
1767 | /* VVVVVVVVVVVV */ | |
9d1c15ef | 1768 | case vtype_int: |
63df3f26 JH |
1769 | sprintf(CS var_buffer, "%d", *(int *)(val)); /* Integer */ |
1770 | return var_buffer; | |
9d1c15ef JH |
1771 | |
1772 | case vtype_ino: | |
63df3f26 JH |
1773 | sprintf(CS var_buffer, "%ld", (long int)(*(ino_t *)(val))); /* Inode */ |
1774 | return var_buffer; | |
9d1c15ef JH |
1775 | |
1776 | case vtype_gid: | |
63df3f26 JH |
1777 | sprintf(CS var_buffer, "%ld", (long int)(*(gid_t *)(val))); /* gid */ |
1778 | return var_buffer; | |
9d1c15ef JH |
1779 | |
1780 | case vtype_uid: | |
63df3f26 JH |
1781 | sprintf(CS var_buffer, "%ld", (long int)(*(uid_t *)(val))); /* uid */ |
1782 | return var_buffer; | |
9d1c15ef JH |
1783 | |
1784 | case vtype_bool: | |
63df3f26 JH |
1785 | sprintf(CS var_buffer, "%s", *(BOOL *)(val) ? "yes" : "no"); /* bool */ |
1786 | return var_buffer; | |
9d1c15ef JH |
1787 | |
1788 | case vtype_stringptr: /* Pointer to string */ | |
63df3f26 | 1789 | return (s = *((uschar **)(val))) ? s : US""; |
9d1c15ef JH |
1790 | |
1791 | case vtype_pid: | |
63df3f26 JH |
1792 | sprintf(CS var_buffer, "%d", (int)getpid()); /* pid */ |
1793 | return var_buffer; | |
9d1c15ef JH |
1794 | |
1795 | case vtype_load_avg: | |
63df3f26 JH |
1796 | sprintf(CS var_buffer, "%d", OS_GETLOADAVG()); /* load_average */ |
1797 | return var_buffer; | |
9d1c15ef JH |
1798 | |
1799 | case vtype_host_lookup: /* Lookup if not done so */ | |
63df3f26 JH |
1800 | if (sender_host_name == NULL && sender_host_address != NULL && |
1801 | !host_lookup_failed && host_name_lookup() == OK) | |
1802 | host_build_sender_fullhost(); | |
1803 | return (sender_host_name == NULL)? US"" : sender_host_name; | |
9d1c15ef JH |
1804 | |
1805 | case vtype_localpart: /* Get local part from address */ | |
63df3f26 JH |
1806 | s = *((uschar **)(val)); |
1807 | if (s == NULL) return US""; | |
1808 | domain = Ustrrchr(s, '@'); | |
1809 | if (domain == NULL) return s; | |
1810 | if (domain - s > sizeof(var_buffer) - 1) | |
1811 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "local part longer than " SIZE_T_FMT | |
1812 | " in string expansion", sizeof(var_buffer)); | |
1813 | Ustrncpy(var_buffer, s, domain - s); | |
1814 | var_buffer[domain - s] = 0; | |
1815 | return var_buffer; | |
9d1c15ef JH |
1816 | |
1817 | case vtype_domain: /* Get domain from address */ | |
63df3f26 JH |
1818 | s = *((uschar **)(val)); |
1819 | if (s == NULL) return US""; | |
1820 | domain = Ustrrchr(s, '@'); | |
1821 | return (domain == NULL)? US"" : domain + 1; | |
9d1c15ef JH |
1822 | |
1823 | case vtype_msgheaders: | |
63df3f26 | 1824 | return find_header(NULL, exists_only, newsize, FALSE, NULL); |
9d1c15ef JH |
1825 | |
1826 | case vtype_msgheaders_raw: | |
63df3f26 | 1827 | return find_header(NULL, exists_only, newsize, TRUE, NULL); |
9d1c15ef JH |
1828 | |
1829 | case vtype_msgbody: /* Pointer to msgbody string */ | |
1830 | case vtype_msgbody_end: /* Ditto, the end of the msg */ | |
63df3f26 | 1831 | ss = (uschar **)(val); |
d315eda1 | 1832 | if (!*ss && deliver_datafile >= 0) /* Read body when needed */ |
059ec3d9 | 1833 | { |
63df3f26 JH |
1834 | uschar *body; |
1835 | off_t start_offset = SPOOL_DATA_START_OFFSET; | |
1836 | int len = message_body_visible; | |
1837 | if (len > message_size) len = message_size; | |
1838 | *ss = body = store_malloc(len+1); | |
1839 | body[0] = 0; | |
1840 | if (vp->type == vtype_msgbody_end) | |
9d1c15ef | 1841 | { |
63df3f26 JH |
1842 | struct stat statbuf; |
1843 | if (fstat(deliver_datafile, &statbuf) == 0) | |
1844 | { | |
1845 | start_offset = statbuf.st_size - len; | |
1846 | if (start_offset < SPOOL_DATA_START_OFFSET) | |
1847 | start_offset = SPOOL_DATA_START_OFFSET; | |
1848 | } | |
9d1c15ef | 1849 | } |
d4ff61d1 JH |
1850 | if (lseek(deliver_datafile, start_offset, SEEK_SET) < 0) |
1851 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "deliver_datafile lseek: %s", | |
1852 | strerror(errno)); | |
63df3f26 JH |
1853 | len = read(deliver_datafile, body, len); |
1854 | if (len > 0) | |
9d1c15ef | 1855 | { |
63df3f26 JH |
1856 | body[len] = 0; |
1857 | if (message_body_newlines) /* Separate loops for efficiency */ | |
1858 | while (len > 0) | |
1859 | { if (body[--len] == 0) body[len] = ' '; } | |
1860 | else | |
1861 | while (len > 0) | |
1862 | { if (body[--len] == '\n' || body[len] == 0) body[len] = ' '; } | |
9d1c15ef | 1863 | } |
059ec3d9 | 1864 | } |
d315eda1 | 1865 | return *ss ? *ss : US""; |
059ec3d9 | 1866 | |
9d1c15ef | 1867 | case vtype_todbsdin: /* BSD inbox time of day */ |
63df3f26 | 1868 | return tod_stamp(tod_bsdin); |
059ec3d9 | 1869 | |
9d1c15ef | 1870 | case vtype_tode: /* Unix epoch time of day */ |
63df3f26 | 1871 | return tod_stamp(tod_epoch); |
059ec3d9 | 1872 | |
9d1c15ef | 1873 | case vtype_todel: /* Unix epoch/usec time of day */ |
63df3f26 | 1874 | return tod_stamp(tod_epoch_l); |
f5787926 | 1875 | |
9d1c15ef | 1876 | case vtype_todf: /* Full time of day */ |
63df3f26 | 1877 | return tod_stamp(tod_full); |
059ec3d9 | 1878 | |
9d1c15ef | 1879 | case vtype_todl: /* Log format time of day */ |
63df3f26 | 1880 | return tod_stamp(tod_log_bare); /* (without timezone) */ |
059ec3d9 | 1881 | |
9d1c15ef | 1882 | case vtype_todzone: /* Time zone offset only */ |
63df3f26 | 1883 | return tod_stamp(tod_zone); |
059ec3d9 | 1884 | |
9d1c15ef | 1885 | case vtype_todzulu: /* Zulu time */ |
63df3f26 | 1886 | return tod_stamp(tod_zulu); |
059ec3d9 | 1887 | |
9d1c15ef | 1888 | case vtype_todlf: /* Log file datestamp tod */ |
63df3f26 | 1889 | return tod_stamp(tod_log_datestamp_daily); |
059ec3d9 | 1890 | |
9d1c15ef | 1891 | case vtype_reply: /* Get reply address */ |
63df3f26 JH |
1892 | s = find_header(US"reply-to:", exists_only, newsize, TRUE, |
1893 | headers_charset); | |
1894 | if (s != NULL) while (isspace(*s)) s++; | |
1895 | if (s == NULL || *s == 0) | |
1896 | { | |
1897 | *newsize = 0; /* For the *s==0 case */ | |
1898 | s = find_header(US"from:", exists_only, newsize, TRUE, headers_charset); | |
1899 | } | |
1900 | if (s != NULL) | |
1901 | { | |
1902 | uschar *t; | |
1903 | while (isspace(*s)) s++; | |
1904 | for (t = s; *t != 0; t++) if (*t == '\n') *t = ' '; | |
1905 | while (t > s && isspace(t[-1])) t--; | |
1906 | *t = 0; | |
1907 | } | |
1908 | return (s == NULL)? US"" : s; | |
059ec3d9 | 1909 | |
9d1c15ef JH |
1910 | case vtype_string_func: |
1911 | { | |
1912 | uschar * (*fn)() = val; | |
1913 | return fn(); | |
1914 | } | |
8e669ac1 | 1915 | |
9d1c15ef JH |
1916 | case vtype_pspace: |
1917 | { | |
1918 | int inodes; | |
1919 | sprintf(CS var_buffer, "%d", | |
1920 | receive_statvfs(val == (void *)TRUE, &inodes)); | |
1921 | } | |
1922 | return var_buffer; | |
8e669ac1 | 1923 | |
9d1c15ef JH |
1924 | case vtype_pinodes: |
1925 | { | |
1926 | int inodes; | |
1927 | (void) receive_statvfs(val == (void *)TRUE, &inodes); | |
1928 | sprintf(CS var_buffer, "%d", inodes); | |
1929 | } | |
1930 | return var_buffer; | |
80a47a2c | 1931 | |
9d1c15ef | 1932 | case vtype_cert: |
63df3f26 | 1933 | return *(void **)val ? US"<cert>" : US""; |
80a47a2c | 1934 | |
63df3f26 | 1935 | #ifndef DISABLE_DKIM |
9d1c15ef | 1936 | case vtype_dkim: |
63df3f26 JH |
1937 | return dkim_exim_expand_query((int)(long)val); |
1938 | #endif | |
059ec3d9 | 1939 | |
9d1c15ef | 1940 | } |
6c08476d LM |
1941 | |
1942 | return NULL; /* Unknown variable. Silences static checkers. */ | |
059ec3d9 PH |
1943 | } |
1944 | ||
1945 | ||
1946 | ||
1947 | ||
d9b2312b JH |
1948 | void |
1949 | modify_variable(uschar *name, void * value) | |
1950 | { | |
9d1c15ef JH |
1951 | var_entry * vp; |
1952 | if ((vp = find_var_ent(name))) vp->value = value; | |
d9b2312b JH |
1953 | return; /* Unknown variable name, fail silently */ |
1954 | } | |
1955 | ||
1956 | ||
1957 | ||
1958 | ||
1959 | ||
cf0812d5 | 1960 | |
059ec3d9 PH |
1961 | /************************************************* |
1962 | * Read and expand substrings * | |
1963 | *************************************************/ | |
1964 | ||
1965 | /* This function is called to read and expand argument substrings for various | |
1966 | expansion items. Some have a minimum requirement that is less than the maximum; | |
1967 | in these cases, the first non-present one is set to NULL. | |
1968 | ||
1969 | Arguments: | |
1970 | sub points to vector of pointers to set | |
1971 | n maximum number of substrings | |
1972 | m minimum required | |
1973 | sptr points to current string pointer | |
1974 | skipping the skipping flag | |
1975 | check_end if TRUE, check for final '}' | |
1976 | name name of item, for error message | |
b0e85a8f JH |
1977 | resetok if not NULL, pointer to flag - write FALSE if unsafe to reset |
1978 | the store. | |
059ec3d9 PH |
1979 | |
1980 | Returns: 0 OK; string pointer updated | |
1981 | 1 curly bracketing error (too few arguments) | |
1982 | 2 too many arguments (only if check_end is set); message set | |
1983 | 3 other error (expansion failure) | |
1984 | */ | |
1985 | ||
1986 | static int | |
55414b25 | 1987 | read_subs(uschar **sub, int n, int m, const uschar **sptr, BOOL skipping, |
b0e85a8f | 1988 | BOOL check_end, uschar *name, BOOL *resetok) |
059ec3d9 PH |
1989 | { |
1990 | int i; | |
55414b25 | 1991 | const uschar *s = *sptr; |
059ec3d9 PH |
1992 | |
1993 | while (isspace(*s)) s++; | |
1994 | for (i = 0; i < n; i++) | |
1995 | { | |
1996 | if (*s != '{') | |
1997 | { | |
e47376be JH |
1998 | if (i < m) |
1999 | { | |
2000 | expand_string_message = string_sprintf("Not enough arguments for '%s' " | |
2001 | "(min is %d)", name, m); | |
2002 | return 1; | |
2003 | } | |
059ec3d9 PH |
2004 | sub[i] = NULL; |
2005 | break; | |
2006 | } | |
e47376be JH |
2007 | if (!(sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, resetok))) |
2008 | return 3; | |
059ec3d9 PH |
2009 | if (*s++ != '}') return 1; |
2010 | while (isspace(*s)) s++; | |
2011 | } | |
2012 | if (check_end && *s++ != '}') | |
2013 | { | |
2014 | if (s[-1] == '{') | |
2015 | { | |
e47376be | 2016 | expand_string_message = string_sprintf("Too many arguments for '%s' " |
059ec3d9 PH |
2017 | "(max is %d)", name, n); |
2018 | return 2; | |
2019 | } | |
e47376be | 2020 | expand_string_message = string_sprintf("missing '}' after '%s'", name); |
059ec3d9 PH |
2021 | return 1; |
2022 | } | |
2023 | ||
2024 | *sptr = s; | |
2025 | return 0; | |
2026 | } | |
2027 | ||
2028 | ||
2029 | ||
2030 | ||
641cb756 PH |
2031 | /************************************************* |
2032 | * Elaborate message for bad variable * | |
2033 | *************************************************/ | |
2034 | ||
2035 | /* For the "unknown variable" message, take a look at the variable's name, and | |
2036 | give additional information about possible ACL variables. The extra information | |
2037 | is added on to expand_string_message. | |
2038 | ||
2039 | Argument: the name of the variable | |
2040 | Returns: nothing | |
2041 | */ | |
2042 | ||
2043 | static void | |
2044 | check_variable_error_message(uschar *name) | |
2045 | { | |
2046 | if (Ustrncmp(name, "acl_", 4) == 0) | |
2047 | expand_string_message = string_sprintf("%s (%s)", expand_string_message, | |
2048 | (name[4] == 'c' || name[4] == 'm')? | |
2049 | (isalpha(name[5])? | |
2050 | US"6th character of a user-defined ACL variable must be a digit or underscore" : | |
2051 | US"strict_acl_vars is set" /* Syntax is OK, it has to be this */ | |
2052 | ) : | |
2053 | US"user-defined ACL variables must start acl_c or acl_m"); | |
2054 | } | |
2055 | ||
2056 | ||
2057 | ||
f60d98e8 JH |
2058 | /* |
2059 | Load args from sub array to globals, and call acl_check(). | |
ef21c07d | 2060 | Sub array will be corrupted on return. |
f60d98e8 JH |
2061 | |
2062 | Returns: OK access is granted by an ACCEPT verb | |
6e3b198d | 2063 | DISCARD access is (apparently) granted by a DISCARD verb |
f60d98e8 JH |
2064 | FAIL access is denied |
2065 | FAIL_DROP access is denied; drop the connection | |
2066 | DEFER can't tell at the moment | |
2067 | ERROR disaster | |
2068 | */ | |
2069 | static int | |
2070 | eval_acl(uschar ** sub, int nsub, uschar ** user_msgp) | |
2071 | { | |
2072 | int i; | |
ef21c07d JH |
2073 | int sav_narg = acl_narg; |
2074 | int ret; | |
93a6fce2 | 2075 | uschar * dummy_logmsg; |
faa05a93 | 2076 | extern int acl_where; |
f60d98e8 | 2077 | |
0539a19d | 2078 | if(--nsub > nelem(acl_arg)) nsub = nelem(acl_arg); |
ef21c07d JH |
2079 | for (i = 0; i < nsub && sub[i+1]; i++) |
2080 | { | |
93a6fce2 | 2081 | uschar * tmp = acl_arg[i]; |
ef21c07d JH |
2082 | acl_arg[i] = sub[i+1]; /* place callers args in the globals */ |
2083 | sub[i+1] = tmp; /* stash the old args using our caller's storage */ | |
2084 | } | |
2085 | acl_narg = i; | |
bef3ea7f | 2086 | while (i < nsub) |
ef21c07d JH |
2087 | { |
2088 | sub[i+1] = acl_arg[i]; | |
2089 | acl_arg[i++] = NULL; | |
2090 | } | |
f60d98e8 JH |
2091 | |
2092 | DEBUG(D_expand) | |
e1d04f48 | 2093 | debug_printf_indent("expanding: acl: %s arg: %s%s\n", |
f60d98e8 | 2094 | sub[0], |
60f8e1e8 JH |
2095 | acl_narg>0 ? acl_arg[0] : US"<none>", |
2096 | acl_narg>1 ? " +more" : ""); | |
f60d98e8 | 2097 | |
93a6fce2 | 2098 | ret = acl_eval(acl_where, sub[0], user_msgp, &dummy_logmsg); |
ef21c07d JH |
2099 | |
2100 | for (i = 0; i < nsub; i++) | |
2101 | acl_arg[i] = sub[i+1]; /* restore old args */ | |
2102 | acl_narg = sav_narg; | |
2103 | ||
2104 | return ret; | |
f60d98e8 JH |
2105 | } |
2106 | ||
2107 | ||
2108 | ||
2109 | ||
059ec3d9 PH |
2110 | /************************************************* |
2111 | * Read and evaluate a condition * | |
2112 | *************************************************/ | |
2113 | ||
2114 | /* | |
2115 | Arguments: | |
2116 | s points to the start of the condition text | |
b0e85a8f JH |
2117 | resetok points to a BOOL which is written false if it is unsafe to |
2118 | free memory. Certain condition types (acl) may have side-effect | |
2119 | allocation which must be preserved. | |
059ec3d9 PH |
2120 | yield points to a BOOL to hold the result of the condition test; |
2121 | if NULL, we are just reading through a condition that is | |
2122 | part of an "or" combination to check syntax, or in a state | |
2123 | where the answer isn't required | |
2124 | ||
2125 | Returns: a pointer to the first character after the condition, or | |
2126 | NULL after an error | |
2127 | */ | |
2128 | ||
55414b25 JH |
2129 | static const uschar * |
2130 | eval_condition(const uschar *s, BOOL *resetok, BOOL *yield) | |
059ec3d9 PH |
2131 | { |
2132 | BOOL testfor = TRUE; | |
2133 | BOOL tempcond, combined_cond; | |
2134 | BOOL *subcondptr; | |
5cfd2e57 | 2135 | BOOL sub2_honour_dollar = TRUE; |
059ec3d9 | 2136 | int i, rc, cond_type, roffset; |
97d17305 | 2137 | int_eximarith_t num[2]; |
059ec3d9 PH |
2138 | struct stat statbuf; |
2139 | uschar name[256]; | |
55414b25 | 2140 | const uschar *sub[10]; |
059ec3d9 PH |
2141 | |
2142 | const pcre *re; | |
2143 | const uschar *rerror; | |
2144 | ||
2145 | for (;;) | |
2146 | { | |
2147 | while (isspace(*s)) s++; | |
2148 | if (*s == '!') { testfor = !testfor; s++; } else break; | |
2149 | } | |
2150 | ||
2151 | /* Numeric comparisons are symbolic */ | |
2152 | ||
2153 | if (*s == '=' || *s == '>' || *s == '<') | |
2154 | { | |
2155 | int p = 0; | |
2156 | name[p++] = *s++; | |
2157 | if (*s == '=') | |
2158 | { | |
2159 | name[p++] = '='; | |
2160 | s++; | |
2161 | } | |
2162 | name[p] = 0; | |
2163 | } | |
2164 | ||
2165 | /* All other conditions are named */ | |
2166 | ||
2167 | else s = read_name(name, 256, s, US"_"); | |
2168 | ||
2169 | /* If we haven't read a name, it means some non-alpha character is first. */ | |
2170 | ||
2171 | if (name[0] == 0) | |
2172 | { | |
2173 | expand_string_message = string_sprintf("condition name expected, " | |
2174 | "but found \"%.16s\"", s); | |
2175 | return NULL; | |
2176 | } | |
2177 | ||
2178 | /* Find which condition we are dealing with, and switch on it */ | |
2179 | ||
0539a19d | 2180 | cond_type = chop_match(name, cond_table, nelem(cond_table)); |
059ec3d9 PH |
2181 | switch(cond_type) |
2182 | { | |
9b4768fa PH |
2183 | /* def: tests for a non-empty variable, or for the existence of a header. If |
2184 | yield == NULL we are in a skipping state, and don't care about the answer. */ | |
059ec3d9 PH |
2185 | |
2186 | case ECOND_DEF: | |
2187 | if (*s != ':') | |
2188 | { | |
2189 | expand_string_message = US"\":\" expected after \"def\""; | |
2190 | return NULL; | |
2191 | } | |
2192 | ||
2193 | s = read_name(name, 256, s+1, US"_"); | |
2194 | ||
0d85fa3f PH |
2195 | /* Test for a header's existence. If the name contains a closing brace |
2196 | character, this may be a user error where the terminating colon has been | |
2197 | omitted. Set a flag to adjust a subsequent error message in this case. */ | |
059ec3d9 PH |
2198 | |
2199 | if (Ustrncmp(name, "h_", 2) == 0 || | |
2200 | Ustrncmp(name, "rh_", 3) == 0 || | |
2201 | Ustrncmp(name, "bh_", 3) == 0 || | |
2202 | Ustrncmp(name, "header_", 7) == 0 || | |
2203 | Ustrncmp(name, "rheader_", 8) == 0 || | |
2204 | Ustrncmp(name, "bheader_", 8) == 0) | |
2205 | { | |
2206 | s = read_header_name(name, 256, s); | |
b5b871ac | 2207 | /* {-for-text-editors */ |
0d85fa3f | 2208 | if (Ustrchr(name, '}') != NULL) malformed_header = TRUE; |
059ec3d9 PH |
2209 | if (yield != NULL) *yield = |
2210 | (find_header(name, TRUE, NULL, FALSE, NULL) != NULL) == testfor; | |
2211 | } | |
2212 | ||
9b4768fa PH |
2213 | /* Test for a variable's having a non-empty value. A non-existent variable |
2214 | causes an expansion failure. */ | |
059ec3d9 PH |
2215 | |
2216 | else | |
2217 | { | |
2218 | uschar *value = find_variable(name, TRUE, yield == NULL, NULL); | |
2219 | if (value == NULL) | |
2220 | { | |
2221 | expand_string_message = (name[0] == 0)? | |
2222 | string_sprintf("variable name omitted after \"def:\"") : | |
2223 | string_sprintf("unknown variable \"%s\" after \"def:\"", name); | |
641cb756 | 2224 | check_variable_error_message(name); |
059ec3d9 PH |
2225 | return NULL; |
2226 | } | |
9b4768fa | 2227 | if (yield != NULL) *yield = (value[0] != 0) == testfor; |
059ec3d9 PH |
2228 | } |
2229 | ||
2230 | return s; | |
2231 | ||
2232 | ||
2233 | /* first_delivery tests for first delivery attempt */ | |
2234 | ||
2235 | case ECOND_FIRST_DELIVERY: | |
2236 | if (yield != NULL) *yield = deliver_firsttime == testfor; | |
2237 | return s; | |
2238 | ||
2239 | ||
2240 | /* queue_running tests for any process started by a queue runner */ | |
2241 | ||
2242 | case ECOND_QUEUE_RUNNING: | |
2243 | if (yield != NULL) *yield = (queue_run_pid != (pid_t)0) == testfor; | |
2244 | return s; | |
2245 | ||
2246 | ||
2247 | /* exists: tests for file existence | |
2248 | isip: tests for any IP address | |
2249 | isip4: tests for an IPv4 address | |
2250 | isip6: tests for an IPv6 address | |
2251 | pam: does PAM authentication | |
2252 | radius: does RADIUS authentication | |
2253 | ldapauth: does LDAP authentication | |
2254 | pwcheck: does Cyrus SASL pwcheck authentication | |
2255 | */ | |
2256 | ||
2257 | case ECOND_EXISTS: | |
2258 | case ECOND_ISIP: | |
2259 | case ECOND_ISIP4: | |
2260 | case ECOND_ISIP6: | |
2261 | case ECOND_PAM: | |
2262 | case ECOND_RADIUS: | |
2263 | case ECOND_LDAPAUTH: | |
2264 | case ECOND_PWCHECK: | |
2265 | ||
2266 | while (isspace(*s)) s++; | |
b5b871ac | 2267 | if (*s != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
059ec3d9 | 2268 | |
b0e85a8f | 2269 | sub[0] = expand_string_internal(s+1, TRUE, &s, yield == NULL, TRUE, resetok); |
059ec3d9 | 2270 | if (sub[0] == NULL) return NULL; |
b5b871ac | 2271 | /* {-for-text-editors */ |
059ec3d9 PH |
2272 | if (*s++ != '}') goto COND_FAILED_CURLY_END; |
2273 | ||
2274 | if (yield == NULL) return s; /* No need to run the test if skipping */ | |
2275 | ||
2276 | switch(cond_type) | |
2277 | { | |
2278 | case ECOND_EXISTS: | |
2279 | if ((expand_forbid & RDO_EXISTS) != 0) | |
2280 | { | |
2281 | expand_string_message = US"File existence tests are not permitted"; | |
2282 | return NULL; | |
2283 | } | |
2284 | *yield = (Ustat(sub[0], &statbuf) == 0) == testfor; | |
2285 | break; | |
2286 | ||
2287 | case ECOND_ISIP: | |
2288 | case ECOND_ISIP4: | |
2289 | case ECOND_ISIP6: | |
2290 | rc = string_is_ip_address(sub[0], NULL); | |
7e66e54d | 2291 | *yield = ((cond_type == ECOND_ISIP)? (rc != 0) : |
059ec3d9 PH |
2292 | (cond_type == ECOND_ISIP4)? (rc == 4) : (rc == 6)) == testfor; |
2293 | break; | |
2294 | ||
2295 | /* Various authentication tests - all optionally compiled */ | |
2296 | ||
2297 | case ECOND_PAM: | |
2298 | #ifdef SUPPORT_PAM | |
2299 | rc = auth_call_pam(sub[0], &expand_string_message); | |
2300 | goto END_AUTH; | |
2301 | #else | |
2302 | goto COND_FAILED_NOT_COMPILED; | |
2303 | #endif /* SUPPORT_PAM */ | |
2304 | ||
2305 | case ECOND_RADIUS: | |
2306 | #ifdef RADIUS_CONFIG_FILE | |
2307 | rc = auth_call_radius(sub[0], &expand_string_message); | |
2308 | goto END_AUTH; | |
2309 | #else | |
2310 | goto COND_FAILED_NOT_COMPILED; | |
2311 | #endif /* RADIUS_CONFIG_FILE */ | |
2312 | ||
2313 | case ECOND_LDAPAUTH: | |
2314 | #ifdef LOOKUP_LDAP | |
2315 | { | |
2316 | /* Just to keep the interface the same */ | |
2317 | BOOL do_cache; | |
2318 | int old_pool = store_pool; | |
2319 | store_pool = POOL_SEARCH; | |
2320 | rc = eldapauth_find((void *)(-1), NULL, sub[0], Ustrlen(sub[0]), NULL, | |
2321 | &expand_string_message, &do_cache); | |
2322 | store_pool = old_pool; | |
2323 | } | |
2324 | goto END_AUTH; | |
2325 | #else | |
2326 | goto COND_FAILED_NOT_COMPILED; | |
2327 | #endif /* LOOKUP_LDAP */ | |
2328 | ||
2329 | case ECOND_PWCHECK: | |
2330 | #ifdef CYRUS_PWCHECK_SOCKET | |
2331 | rc = auth_call_pwcheck(sub[0], &expand_string_message); | |
2332 | goto END_AUTH; | |
2333 | #else | |
2334 | goto COND_FAILED_NOT_COMPILED; | |
2335 | #endif /* CYRUS_PWCHECK_SOCKET */ | |
2336 | ||
2337 | #if defined(SUPPORT_PAM) || defined(RADIUS_CONFIG_FILE) || \ | |
2338 | defined(LOOKUP_LDAP) || defined(CYRUS_PWCHECK_SOCKET) | |
2339 | END_AUTH: | |
2340 | if (rc == ERROR || rc == DEFER) return NULL; | |
2341 | *yield = (rc == OK) == testfor; | |
2342 | #endif | |
2343 | } | |
2344 | return s; | |
2345 | ||
2346 | ||
333eea9c JH |
2347 | /* call ACL (in a conditional context). Accept true, deny false. |
2348 | Defer is a forced-fail. Anything set by message= goes to $value. | |
f60d98e8 JH |
2349 | Up to ten parameters are used; we use the braces round the name+args |
2350 | like the saslauthd condition does, to permit a variable number of args. | |
2351 | See also the expansion-item version EITEM_ACL and the traditional | |
2352 | acl modifier ACLC_ACL. | |
fd5dad68 JH |
2353 | Since the ACL may allocate new global variables, tell our caller to not |
2354 | reclaim memory. | |
f60d98e8 | 2355 | */ |
333eea9c JH |
2356 | |
2357 | case ECOND_ACL: | |
bef3ea7f | 2358 | /* ${if acl {{name}{arg1}{arg2}...} {yes}{no}} */ |
333eea9c | 2359 | { |
55414b25 | 2360 | uschar *sub[10]; |
333eea9c | 2361 | uschar *user_msg; |
333eea9c | 2362 | BOOL cond = FALSE; |
333eea9c JH |
2363 | |
2364 | while (isspace(*s)) s++; | |
6d9cfc47 | 2365 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /*}*/ |
333eea9c | 2366 | |
0539a19d | 2367 | switch(read_subs(sub, nelem(sub), 1, |
b0e85a8f | 2368 | &s, yield == NULL, TRUE, US"acl", resetok)) |
333eea9c | 2369 | { |
f60d98e8 JH |
2370 | case 1: expand_string_message = US"too few arguments or bracketing " |
2371 | "error for acl"; | |
2372 | case 2: | |
2373 | case 3: return NULL; | |
333eea9c | 2374 | } |
f60d98e8 | 2375 | |
9e70917d JH |
2376 | if (yield != NULL) |
2377 | { | |
2378 | *resetok = FALSE; /* eval_acl() might allocate; do not reclaim */ | |
2379 | switch(eval_acl(sub, nelem(sub), &user_msg)) | |
f60d98e8 JH |
2380 | { |
2381 | case OK: | |
2382 | cond = TRUE; | |
2383 | case FAIL: | |
bef3ea7f | 2384 | lookup_value = NULL; |
f60d98e8 | 2385 | if (user_msg) |
acec9514 | 2386 | lookup_value = string_copy(user_msg); |
b5b871ac | 2387 | *yield = cond == testfor; |
f60d98e8 JH |
2388 | break; |
2389 | ||
2390 | case DEFER: | |
2391 | expand_string_forcedfail = TRUE; | |
6e3b198d | 2392 | /*FALLTHROUGH*/ |
f60d98e8 JH |
2393 | default: |
2394 | expand_string_message = string_sprintf("error from acl \"%s\"", sub[0]); | |
2395 | return NULL; | |
2396 | } | |
9e70917d | 2397 | } |
f60d98e8 | 2398 | return s; |
333eea9c | 2399 | } |
333eea9c JH |
2400 | |
2401 | ||
059ec3d9 PH |
2402 | /* saslauthd: does Cyrus saslauthd authentication. Four parameters are used: |
2403 | ||
b0e85a8f | 2404 | ${if saslauthd {{username}{password}{service}{realm}} {yes}{no}} |
059ec3d9 PH |
2405 | |
2406 | However, the last two are optional. That is why the whole set is enclosed | |
333eea9c | 2407 | in their own set of braces. */ |
059ec3d9 PH |
2408 | |
2409 | case ECOND_SASLAUTHD: | |
0539a19d JH |
2410 | #ifndef CYRUS_SASLAUTHD_SOCKET |
2411 | goto COND_FAILED_NOT_COMPILED; | |
2412 | #else | |
059ec3d9 | 2413 | { |
0539a19d JH |
2414 | uschar *sub[4]; |
2415 | while (isspace(*s)) s++; | |
2416 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ | |
2417 | switch(read_subs(sub, nelem(sub), 2, &s, yield == NULL, TRUE, US"saslauthd", | |
2418 | resetok)) | |
2419 | { | |
2420 | case 1: expand_string_message = US"too few arguments or bracketing " | |
2421 | "error for saslauthd"; | |
2422 | case 2: | |
2423 | case 3: return NULL; | |
2424 | } | |
2425 | if (sub[2] == NULL) sub[3] = NULL; /* realm if no service */ | |
2426 | if (yield != NULL) | |
2427 | { | |
2428 | int rc = auth_call_saslauthd(sub[0], sub[1], sub[2], sub[3], | |
2429 | &expand_string_message); | |
2430 | if (rc == ERROR || rc == DEFER) return NULL; | |
2431 | *yield = (rc == OK) == testfor; | |
2432 | } | |
2433 | return s; | |
059ec3d9 | 2434 | } |
0539a19d | 2435 | #endif /* CYRUS_SASLAUTHD_SOCKET */ |
059ec3d9 PH |
2436 | |
2437 | ||
2438 | /* symbolic operators for numeric and string comparison, and a number of | |
2439 | other operators, all requiring two arguments. | |
2440 | ||
76dca828 PP |
2441 | crypteq: encrypts plaintext and compares against an encrypted text, |
2442 | using crypt(), crypt16(), MD5 or SHA-1 | |
2443 | inlist/inlisti: checks if first argument is in the list of the second | |
059ec3d9 PH |
2444 | match: does a regular expression match and sets up the numerical |
2445 | variables if it succeeds | |
2446 | match_address: matches in an address list | |
2447 | match_domain: matches in a domain list | |
32d668a5 | 2448 | match_ip: matches a host list that is restricted to IP addresses |
059ec3d9 | 2449 | match_local_part: matches in a local part list |
059ec3d9 PH |
2450 | */ |
2451 | ||
059ec3d9 PH |
2452 | case ECOND_MATCH_ADDRESS: |
2453 | case ECOND_MATCH_DOMAIN: | |
32d668a5 | 2454 | case ECOND_MATCH_IP: |
059ec3d9 | 2455 | case ECOND_MATCH_LOCAL_PART: |
da6dbe26 PP |
2456 | #ifndef EXPAND_LISTMATCH_RHS |
2457 | sub2_honour_dollar = FALSE; | |
2458 | #endif | |
2459 | /* FALLTHROUGH */ | |
2460 | ||
2461 | case ECOND_CRYPTEQ: | |
2462 | case ECOND_INLIST: | |
2463 | case ECOND_INLISTI: | |
2464 | case ECOND_MATCH: | |
059ec3d9 PH |
2465 | |
2466 | case ECOND_NUM_L: /* Numerical comparisons */ | |
2467 | case ECOND_NUM_LE: | |
2468 | case ECOND_NUM_E: | |
2469 | case ECOND_NUM_EE: | |
2470 | case ECOND_NUM_G: | |
2471 | case ECOND_NUM_GE: | |
2472 | ||
2473 | case ECOND_STR_LT: /* String comparisons */ | |
2474 | case ECOND_STR_LTI: | |
2475 | case ECOND_STR_LE: | |
2476 | case ECOND_STR_LEI: | |
2477 | case ECOND_STR_EQ: | |
2478 | case ECOND_STR_EQI: | |
2479 | case ECOND_STR_GT: | |
2480 | case ECOND_STR_GTI: | |
2481 | case ECOND_STR_GE: | |
2482 | case ECOND_STR_GEI: | |
2483 | ||
2484 | for (i = 0; i < 2; i++) | |
2485 | { | |
da6dbe26 PP |
2486 | /* Sometimes, we don't expand substrings; too many insecure configurations |
2487 | created using match_address{}{} and friends, where the second param | |
2488 | includes information from untrustworthy sources. */ | |
2489 | BOOL honour_dollar = TRUE; | |
2490 | if ((i > 0) && !sub2_honour_dollar) | |
2491 | honour_dollar = FALSE; | |
2492 | ||
059ec3d9 PH |
2493 | while (isspace(*s)) s++; |
2494 | if (*s != '{') | |
2495 | { | |
2496 | if (i == 0) goto COND_FAILED_CURLY_START; | |
2497 | expand_string_message = string_sprintf("missing 2nd string in {} " | |
2498 | "after \"%s\"", name); | |
2499 | return NULL; | |
2500 | } | |
d584cdca JH |
2501 | if (!(sub[i] = expand_string_internal(s+1, TRUE, &s, yield == NULL, |
2502 | honour_dollar, resetok))) | |
2503 | return NULL; | |
2504 | DEBUG(D_expand) if (i == 1 && !sub2_honour_dollar && Ustrchr(sub[1], '$')) | |
2505 | debug_printf_indent("WARNING: the second arg is NOT expanded," | |
2506 | " for security reasons\n"); | |
059ec3d9 PH |
2507 | if (*s++ != '}') goto COND_FAILED_CURLY_END; |
2508 | ||
2509 | /* Convert to numerical if required; we know that the names of all the | |
2510 | conditions that compare numbers do not start with a letter. This just saves | |
2511 | checking for them individually. */ | |
2512 | ||
d6066548 | 2513 | if (!isalpha(name[0]) && yield != NULL) |
5dd1517f PH |
2514 | if (sub[i][0] == 0) |
2515 | { | |
2516 | num[i] = 0; | |
2517 | DEBUG(D_expand) | |
e1d04f48 | 2518 | debug_printf_indent("empty string cast to zero for numerical comparison\n"); |
5dd1517f PH |
2519 | } |
2520 | else | |
2521 | { | |
7685ce68 | 2522 | num[i] = expanded_string_integer(sub[i], FALSE); |
5dd1517f PH |
2523 | if (expand_string_message != NULL) return NULL; |
2524 | } | |
059ec3d9 PH |
2525 | } |
2526 | ||
2527 | /* Result not required */ | |
2528 | ||
2529 | if (yield == NULL) return s; | |
2530 | ||
2531 | /* Do an appropriate comparison */ | |
2532 | ||
2533 | switch(cond_type) | |
2534 | { | |
2535 | case ECOND_NUM_E: | |
2536 | case ECOND_NUM_EE: | |
b5b871ac | 2537 | tempcond = (num[0] == num[1]); |
059ec3d9 PH |
2538 | break; |
2539 | ||
2540 | case ECOND_NUM_G: | |
b5b871ac | 2541 | tempcond = (num[0] > num[1]); |
059ec3d9 PH |
2542 | break; |
2543 | ||
2544 | case ECOND_NUM_GE: | |
b5b871ac | 2545 | tempcond = (num[0] >= num[1]); |
059ec3d9 PH |
2546 | break; |
2547 | ||
2548 | case ECOND_NUM_L: | |
b5b871ac | 2549 | tempcond = (num[0] < num[1]); |
059ec3d9 PH |
2550 | break; |
2551 | ||
2552 | case ECOND_NUM_LE: | |
b5b871ac | 2553 | tempcond = (num[0] <= num[1]); |
059ec3d9 PH |
2554 | break; |
2555 | ||
2556 | case ECOND_STR_LT: | |
b5b871ac | 2557 | tempcond = (Ustrcmp(sub[0], sub[1]) < 0); |
059ec3d9 PH |
2558 | break; |
2559 | ||
2560 | case ECOND_STR_LTI: | |
b5b871ac | 2561 | tempcond = (strcmpic(sub[0], sub[1]) < 0); |
059ec3d9 PH |
2562 | break; |
2563 | ||
2564 | case ECOND_STR_LE: | |
b5b871ac | 2565 | tempcond = (Ustrcmp(sub[0], sub[1]) <= 0); |
059ec3d9 PH |
2566 | break; |
2567 | ||
2568 | case ECOND_STR_LEI: | |
b5b871ac | 2569 | tempcond = (strcmpic(sub[0], sub[1]) <= 0); |
059ec3d9 PH |
2570 | break; |
2571 | ||
2572 | case ECOND_STR_EQ: | |
b5b871ac | 2573 | tempcond = (Ustrcmp(sub[0], sub[1]) == 0); |
059ec3d9 PH |
2574 | break; |
2575 | ||
2576 | case ECOND_STR_EQI: | |
b5b871ac | 2577 | tempcond = (strcmpic(sub[0], sub[1]) == 0); |
059ec3d9 PH |
2578 | break; |
2579 | ||
2580 | case ECOND_STR_GT: | |
b5b871ac | 2581 | tempcond = (Ustrcmp(sub[0], sub[1]) > 0); |
059ec3d9 PH |
2582 | break; |
2583 | ||
2584 | case ECOND_STR_GTI: | |
b5b871ac | 2585 | tempcond = (strcmpic(sub[0], sub[1]) > 0); |
059ec3d9 PH |
2586 | break; |
2587 | ||
2588 | case ECOND_STR_GE: | |
b5b871ac | 2589 | tempcond = (Ustrcmp(sub[0], sub[1]) >= 0); |
059ec3d9 PH |
2590 | break; |
2591 | ||
2592 | case ECOND_STR_GEI: | |
b5b871ac | 2593 | tempcond = (strcmpic(sub[0], sub[1]) >= 0); |
059ec3d9 PH |
2594 | break; |
2595 | ||
2596 | case ECOND_MATCH: /* Regular expression match */ | |
2597 | re = pcre_compile(CS sub[1], PCRE_COPT, (const char **)&rerror, &roffset, | |
2598 | NULL); | |
2599 | if (re == NULL) | |
2600 | { | |
2601 | expand_string_message = string_sprintf("regular expression error in " | |
2602 | "\"%s\": %s at offset %d", sub[1], rerror, roffset); | |
2603 | return NULL; | |
2604 | } | |
b5b871ac | 2605 | tempcond = regex_match_and_setup(re, sub[0], 0, -1); |
059ec3d9 PH |
2606 | break; |
2607 | ||
2608 | case ECOND_MATCH_ADDRESS: /* Match in an address list */ | |
2609 | rc = match_address_list(sub[0], TRUE, FALSE, &(sub[1]), NULL, -1, 0, NULL); | |
2610 | goto MATCHED_SOMETHING; | |
2611 | ||
2612 | case ECOND_MATCH_DOMAIN: /* Match in a domain list */ | |
2613 | rc = match_isinlist(sub[0], &(sub[1]), 0, &domainlist_anchor, NULL, | |
2614 | MCL_DOMAIN + MCL_NOEXPAND, TRUE, NULL); | |
2615 | goto MATCHED_SOMETHING; | |
2616 | ||
32d668a5 | 2617 | case ECOND_MATCH_IP: /* Match IP address in a host list */ |
7e66e54d | 2618 | if (sub[0][0] != 0 && string_is_ip_address(sub[0], NULL) == 0) |
32d668a5 PH |
2619 | { |
2620 | expand_string_message = string_sprintf("\"%s\" is not an IP address", | |
2621 | sub[0]); | |
2622 | return NULL; | |
2623 | } | |
2624 | else | |
2625 | { | |
2626 | unsigned int *nullcache = NULL; | |
2627 | check_host_block cb; | |
2628 | ||
2629 | cb.host_name = US""; | |
2630 | cb.host_address = sub[0]; | |
2631 | ||
2632 | /* If the host address starts off ::ffff: it is an IPv6 address in | |
2633 | IPv4-compatible mode. Find the IPv4 part for checking against IPv4 | |
2634 | addresses. */ | |
2635 | ||
2636 | cb.host_ipv4 = (Ustrncmp(cb.host_address, "::ffff:", 7) == 0)? | |
2637 | cb.host_address + 7 : cb.host_address; | |
2638 | ||
2639 | rc = match_check_list( | |
2640 | &sub[1], /* the list */ | |
2641 | 0, /* separator character */ | |
2642 | &hostlist_anchor, /* anchor pointer */ | |
2643 | &nullcache, /* cache pointer */ | |
2644 | check_host, /* function for testing */ | |
2645 | &cb, /* argument for function */ | |
2646 | MCL_HOST, /* type of check */ | |
2647 | sub[0], /* text for debugging */ | |
2648 | NULL); /* where to pass back data */ | |
2649 | } | |
2650 | goto MATCHED_SOMETHING; | |
2651 | ||
059ec3d9 PH |
2652 | case ECOND_MATCH_LOCAL_PART: |
2653 | rc = match_isinlist(sub[0], &(sub[1]), 0, &localpartlist_anchor, NULL, | |
2654 | MCL_LOCALPART + MCL_NOEXPAND, TRUE, NULL); | |
2655 | /* Fall through */ | |
9a26b6b2 | 2656 | /* VVVVVVVVVVVV */ |
059ec3d9 PH |
2657 | MATCHED_SOMETHING: |
2658 | switch(rc) | |
2659 | { | |
2660 | case OK: | |
b5b871ac | 2661 | tempcond = TRUE; |
059ec3d9 PH |
2662 | break; |
2663 | ||
2664 | case FAIL: | |
b5b871ac | 2665 | tempcond = FALSE; |
059ec3d9 PH |
2666 | break; |
2667 | ||
2668 | case DEFER: | |
2669 | expand_string_message = string_sprintf("unable to complete match " | |
2670 | "against \"%s\": %s", sub[1], search_error_message); | |
2671 | return NULL; | |
2672 | } | |
2673 | ||
2674 | break; | |
2675 | ||
2676 | /* Various "encrypted" comparisons. If the second string starts with | |
2677 | "{" then an encryption type is given. Default to crypt() or crypt16() | |
2678 | (build-time choice). */ | |
b5b871ac | 2679 | /* }-for-text-editors */ |
059ec3d9 PH |
2680 | |
2681 | case ECOND_CRYPTEQ: | |
2682 | #ifndef SUPPORT_CRYPTEQ | |
2683 | goto COND_FAILED_NOT_COMPILED; | |
2684 | #else | |
2685 | if (strncmpic(sub[1], US"{md5}", 5) == 0) | |
2686 | { | |
2687 | int sublen = Ustrlen(sub[1]+5); | |
2688 | md5 base; | |
2689 | uschar digest[16]; | |
2690 | ||
2691 | md5_start(&base); | |
cfab9d68 | 2692 | md5_end(&base, sub[0], Ustrlen(sub[0]), digest); |
059ec3d9 PH |
2693 | |
2694 | /* If the length that we are comparing against is 24, the MD5 digest | |
2695 | is expressed as a base64 string. This is the way LDAP does it. However, | |
2696 | some other software uses a straightforward hex representation. We assume | |
2697 | this if the length is 32. Other lengths fail. */ | |
2698 | ||
2699 | if (sublen == 24) | |
2700 | { | |
cfab9d68 | 2701 | uschar *coded = b64encode(digest, 16); |
059ec3d9 PH |
2702 | DEBUG(D_auth) debug_printf("crypteq: using MD5+B64 hashing\n" |
2703 | " subject=%s\n crypted=%s\n", coded, sub[1]+5); | |
b5b871ac | 2704 | tempcond = (Ustrcmp(coded, sub[1]+5) == 0); |
059ec3d9 PH |
2705 | } |
2706 | else if (sublen == 32) | |
2707 | { | |
2708 | int i; | |
2709 | uschar coded[36]; | |
2710 | for (i = 0; i < 16; i++) sprintf(CS (coded+2*i), "%02X", digest[i]); | |
2711 | coded[32] = 0; | |
2712 | DEBUG(D_auth) debug_printf("crypteq: using MD5+hex hashing\n" | |
2713 | " subject=%s\n crypted=%s\n", coded, sub[1]+5); | |
b5b871ac | 2714 | tempcond = (strcmpic(coded, sub[1]+5) == 0); |
059ec3d9 PH |
2715 | } |
2716 | else | |
2717 | { | |
2718 | DEBUG(D_auth) debug_printf("crypteq: length for MD5 not 24 or 32: " | |
2719 | "fail\n crypted=%s\n", sub[1]+5); | |
b5b871ac | 2720 | tempcond = FALSE; |
059ec3d9 PH |
2721 | } |
2722 | } | |
2723 | ||
2724 | else if (strncmpic(sub[1], US"{sha1}", 6) == 0) | |
2725 | { | |
2726 | int sublen = Ustrlen(sub[1]+6); | |
5fb822fc | 2727 | hctx h; |
059ec3d9 PH |
2728 | uschar digest[20]; |
2729 | ||
5fb822fc | 2730 | sha1_start(&h); |
cfab9d68 | 2731 | sha1_end(&h, sub[0], Ustrlen(sub[0]), digest); |
059ec3d9 PH |
2732 | |
2733 | /* If the length that we are comparing against is 28, assume the SHA1 | |
2734 | digest is expressed as a base64 string. If the length is 40, assume a | |
2735 | straightforward hex representation. Other lengths fail. */ | |
2736 | ||
2737 | if (sublen == 28) | |
2738 | { | |
cfab9d68 | 2739 | uschar *coded = b64encode(digest, 20); |
059ec3d9 PH |
2740 | DEBUG(D_auth) debug_printf("crypteq: using SHA1+B64 hashing\n" |
2741 | " subject=%s\n crypted=%s\n", coded, sub[1]+6); | |
b5b871ac | 2742 | tempcond = (Ustrcmp(coded, sub[1]+6) == 0); |
059ec3d9 PH |
2743 | } |
2744 | else if (sublen == 40) | |
2745 | { | |
2746 | int i; | |
2747 | uschar coded[44]; | |
2748 | for (i = 0; i < 20; i++) sprintf(CS (coded+2*i), "%02X", digest[i]); | |
2749 | coded[40] = 0; | |
2750 | DEBUG(D_auth) debug_printf("crypteq: using SHA1+hex hashing\n" | |
2751 | " subject=%s\n crypted=%s\n", coded, sub[1]+6); | |
b5b871ac | 2752 | tempcond = (strcmpic(coded, sub[1]+6) == 0); |
059ec3d9 PH |
2753 | } |
2754 | else | |
2755 | { | |
2756 | DEBUG(D_auth) debug_printf("crypteq: length for SHA-1 not 28 or 40: " | |
2757 | "fail\n crypted=%s\n", sub[1]+6); | |
b5b871ac | 2758 | tempcond = FALSE; |
059ec3d9 PH |
2759 | } |
2760 | } | |
2761 | ||
2762 | else /* {crypt} or {crypt16} and non-{ at start */ | |
76dca828 | 2763 | /* }-for-text-editors */ |
059ec3d9 PH |
2764 | { |
2765 | int which = 0; | |
2766 | uschar *coded; | |
2767 | ||
2768 | if (strncmpic(sub[1], US"{crypt}", 7) == 0) | |
2769 | { | |
2770 | sub[1] += 7; | |
2771 | which = 1; | |
2772 | } | |
2773 | else if (strncmpic(sub[1], US"{crypt16}", 9) == 0) | |
2774 | { | |
2775 | sub[1] += 9; | |
2776 | which = 2; | |
2777 | } | |
b5b871ac | 2778 | else if (sub[1][0] == '{') /* }-for-text-editors */ |
059ec3d9 PH |
2779 | { |
2780 | expand_string_message = string_sprintf("unknown encryption mechanism " | |
2781 | "in \"%s\"", sub[1]); | |
2782 | return NULL; | |
2783 | } | |
2784 | ||
2785 | switch(which) | |
2786 | { | |
2787 | case 0: coded = US DEFAULT_CRYPT(CS sub[0], CS sub[1]); break; | |
2788 | case 1: coded = US crypt(CS sub[0], CS sub[1]); break; | |
2789 | default: coded = US crypt16(CS sub[0], CS sub[1]); break; | |
2790 | } | |
2791 | ||
2792 | #define STR(s) # s | |
2793 | #define XSTR(s) STR(s) | |
2794 | DEBUG(D_auth) debug_printf("crypteq: using %s()\n" | |
2795 | " subject=%s\n crypted=%s\n", | |
9dc2b215 | 2796 | which == 0 ? XSTR(DEFAULT_CRYPT) : which == 1 ? "crypt" : "crypt16", |
059ec3d9 PH |
2797 | coded, sub[1]); |
2798 | #undef STR | |
2799 | #undef XSTR | |
2800 | ||
2801 | /* If the encrypted string contains fewer than two characters (for the | |
2802 | salt), force failure. Otherwise we get false positives: with an empty | |
2803 | string the yield of crypt() is an empty string! */ | |
2804 | ||
9dc2b215 JH |
2805 | if (coded) |
2806 | tempcond = Ustrlen(sub[1]) < 2 ? FALSE : Ustrcmp(coded, sub[1]) == 0; | |
2807 | else if (errno == EINVAL) | |
2808 | tempcond = FALSE; | |
2809 | else | |
2810 | { | |
2811 | expand_string_message = string_sprintf("crypt error: %s\n", | |
2812 | US strerror(errno)); | |
2813 | return NULL; | |
2814 | } | |
059ec3d9 PH |
2815 | } |
2816 | break; | |
2817 | #endif /* SUPPORT_CRYPTEQ */ | |
76dca828 PP |
2818 | |
2819 | case ECOND_INLIST: | |
2820 | case ECOND_INLISTI: | |
2821 | { | |
55414b25 | 2822 | const uschar * list = sub[1]; |
76dca828 | 2823 | int sep = 0; |
76dca828 PP |
2824 | uschar *save_iterate_item = iterate_item; |
2825 | int (*compare)(const uschar *, const uschar *); | |
2826 | ||
05e796ad | 2827 | DEBUG(D_expand) debug_printf_indent("condition: %s item: %s\n", name, sub[0]); |
82dbd376 | 2828 | |
b5b871ac | 2829 | tempcond = FALSE; |
55414b25 JH |
2830 | compare = cond_type == ECOND_INLISTI |
2831 | ? strcmpic : (int (*)(const uschar *, const uschar *)) strcmp; | |
76dca828 | 2832 | |
55414b25 | 2833 | while ((iterate_item = string_nextinlist(&list, &sep, NULL, 0))) |
05e796ad JH |
2834 | { |
2835 | DEBUG(D_expand) debug_printf_indent(" compare %s\n", iterate_item); | |
76dca828 PP |
2836 | if (compare(sub[0], iterate_item) == 0) |
2837 | { | |
b5b871ac | 2838 | tempcond = TRUE; |
76dca828 PP |
2839 | break; |
2840 | } | |
05e796ad | 2841 | } |
76dca828 | 2842 | iterate_item = save_iterate_item; |
76dca828 PP |
2843 | } |
2844 | ||
059ec3d9 PH |
2845 | } /* Switch for comparison conditions */ |
2846 | ||
b5b871ac | 2847 | *yield = tempcond == testfor; |
059ec3d9 PH |
2848 | return s; /* End of comparison conditions */ |
2849 | ||
2850 | ||
2851 | /* and/or: computes logical and/or of several conditions */ | |
2852 | ||
2853 | case ECOND_AND: | |
2854 | case ECOND_OR: | |
2855 | subcondptr = (yield == NULL)? NULL : &tempcond; | |
2856 | combined_cond = (cond_type == ECOND_AND); | |
2857 | ||
2858 | while (isspace(*s)) s++; | |
b5b871ac | 2859 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
059ec3d9 PH |
2860 | |
2861 | for (;;) | |
2862 | { | |
2863 | while (isspace(*s)) s++; | |
b5b871ac | 2864 | /* {-for-text-editors */ |
059ec3d9 | 2865 | if (*s == '}') break; |
b5b871ac | 2866 | if (*s != '{') /* }-for-text-editors */ |
059ec3d9 PH |
2867 | { |
2868 | expand_string_message = string_sprintf("each subcondition " | |
2869 | "inside an \"%s{...}\" condition must be in its own {}", name); | |
2870 | return NULL; | |
2871 | } | |
2872 | ||
b0e85a8f | 2873 | if (!(s = eval_condition(s+1, resetok, subcondptr))) |
059ec3d9 PH |
2874 | { |
2875 | expand_string_message = string_sprintf("%s inside \"%s{...}\" condition", | |
2876 | expand_string_message, name); | |
2877 | return NULL; | |
2878 | } | |
2879 | while (isspace(*s)) s++; | |
2880 | ||
b5b871ac | 2881 | /* {-for-text-editors */ |
059ec3d9 PH |
2882 | if (*s++ != '}') |
2883 | { | |
b5b871ac | 2884 | /* {-for-text-editors */ |
059ec3d9 PH |
2885 | expand_string_message = string_sprintf("missing } at end of condition " |
2886 | "inside \"%s\" group", name); | |
2887 | return NULL; | |
2888 | } | |
2889 | ||
2890 | if (yield != NULL) | |
2891 | { | |
2892 | if (cond_type == ECOND_AND) | |
2893 | { | |
2894 | combined_cond &= tempcond; | |
2895 | if (!combined_cond) subcondptr = NULL; /* once false, don't */ | |
2896 | } /* evaluate any more */ | |
2897 | else | |
2898 | { | |
2899 | combined_cond |= tempcond; | |
2900 | if (combined_cond) subcondptr = NULL; /* once true, don't */ | |
2901 | } /* evaluate any more */ | |
2902 | } | |
2903 | } | |
2904 | ||
2905 | if (yield != NULL) *yield = (combined_cond == testfor); | |
2906 | return ++s; | |
2907 | ||
2908 | ||
0ce9abe6 PH |
2909 | /* forall/forany: iterates a condition with different values */ |
2910 | ||
2911 | case ECOND_FORALL: | |
2912 | case ECOND_FORANY: | |
2913 | { | |
55414b25 | 2914 | const uschar * list; |
0ce9abe6 | 2915 | int sep = 0; |
282b357d | 2916 | uschar *save_iterate_item = iterate_item; |
0ce9abe6 | 2917 | |
e1d04f48 | 2918 | DEBUG(D_expand) debug_printf_indent("condition: %s\n", name); |
82dbd376 | 2919 | |
0ce9abe6 | 2920 | while (isspace(*s)) s++; |
b5b871ac | 2921 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
b0e85a8f | 2922 | sub[0] = expand_string_internal(s, TRUE, &s, (yield == NULL), TRUE, resetok); |
0ce9abe6 | 2923 | if (sub[0] == NULL) return NULL; |
b5b871ac | 2924 | /* {-for-text-editors */ |
0ce9abe6 PH |
2925 | if (*s++ != '}') goto COND_FAILED_CURLY_END; |
2926 | ||
2927 | while (isspace(*s)) s++; | |
b5b871ac | 2928 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
0ce9abe6 PH |
2929 | |
2930 | sub[1] = s; | |
2931 | ||
2932 | /* Call eval_condition once, with result discarded (as if scanning a | |
2933 | "false" part). This allows us to find the end of the condition, because if | |
2934 | the list it empty, we won't actually evaluate the condition for real. */ | |
2935 | ||
b0e85a8f | 2936 | if (!(s = eval_condition(sub[1], resetok, NULL))) |
0ce9abe6 PH |
2937 | { |
2938 | expand_string_message = string_sprintf("%s inside \"%s\" condition", | |
2939 | expand_string_message, name); | |
2940 | return NULL; | |
2941 | } | |
2942 | while (isspace(*s)) s++; | |
2943 | ||
b5b871ac | 2944 | /* {-for-text-editors */ |
0ce9abe6 PH |
2945 | if (*s++ != '}') |
2946 | { | |
b5b871ac | 2947 | /* {-for-text-editors */ |
0ce9abe6 PH |
2948 | expand_string_message = string_sprintf("missing } at end of condition " |
2949 | "inside \"%s\"", name); | |
2950 | return NULL; | |
2951 | } | |
2952 | ||
2953 | if (yield != NULL) *yield = !testfor; | |
55414b25 JH |
2954 | list = sub[0]; |
2955 | while ((iterate_item = string_nextinlist(&list, &sep, NULL, 0)) != NULL) | |
0ce9abe6 | 2956 | { |
e1d04f48 | 2957 | DEBUG(D_expand) debug_printf_indent("%s: $item = \"%s\"\n", name, iterate_item); |
b0e85a8f | 2958 | if (!eval_condition(sub[1], resetok, &tempcond)) |
0ce9abe6 PH |
2959 | { |
2960 | expand_string_message = string_sprintf("%s inside \"%s\" condition", | |
2961 | expand_string_message, name); | |
e58c13cc | 2962 | iterate_item = save_iterate_item; |
0ce9abe6 PH |
2963 | return NULL; |
2964 | } | |
e1d04f48 | 2965 | DEBUG(D_expand) debug_printf_indent("%s: condition evaluated to %s\n", name, |
0ce9abe6 PH |
2966 | tempcond? "true":"false"); |
2967 | ||
2968 | if (yield != NULL) *yield = (tempcond == testfor); | |
2969 | if (tempcond == (cond_type == ECOND_FORANY)) break; | |
2970 | } | |
2971 | ||
282b357d | 2972 | iterate_item = save_iterate_item; |
0ce9abe6 PH |
2973 | return s; |
2974 | } | |
2975 | ||
2976 | ||
f3766eb5 NM |
2977 | /* The bool{} expansion condition maps a string to boolean. |
2978 | The values supported should match those supported by the ACL condition | |
2979 | (acl.c, ACLC_CONDITION) so that we keep to a minimum the different ideas | |
2980 | of true/false. Note that Router "condition" rules have a different | |
2981 | interpretation, where general data can be used and only a few values | |
2982 | map to FALSE. | |
2983 | Note that readconf.c boolean matching, for boolean configuration options, | |
6a8de854 PP |
2984 | only matches true/yes/false/no. |
2985 | The bool_lax{} condition matches the Router logic, which is much more | |
2986 | liberal. */ | |
f3766eb5 | 2987 | case ECOND_BOOL: |
6a8de854 | 2988 | case ECOND_BOOL_LAX: |
f3766eb5 NM |
2989 | { |
2990 | uschar *sub_arg[1]; | |
71265ae9 | 2991 | uschar *t, *t2; |
6a8de854 | 2992 | uschar *ourname; |
f3766eb5 NM |
2993 | size_t len; |
2994 | BOOL boolvalue = FALSE; | |
2995 | while (isspace(*s)) s++; | |
b5b871ac | 2996 | if (*s != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
6a8de854 | 2997 | ourname = cond_type == ECOND_BOOL_LAX ? US"bool_lax" : US"bool"; |
b0e85a8f | 2998 | switch(read_subs(sub_arg, 1, 1, &s, yield == NULL, FALSE, ourname, resetok)) |
f3766eb5 | 2999 | { |
6a8de854 PP |
3000 | case 1: expand_string_message = string_sprintf( |
3001 | "too few arguments or bracketing error for %s", | |
3002 | ourname); | |
f3766eb5 NM |
3003 | /*FALLTHROUGH*/ |
3004 | case 2: | |
3005 | case 3: return NULL; | |
3006 | } | |
3007 | t = sub_arg[0]; | |
3008 | while (isspace(*t)) t++; | |
3009 | len = Ustrlen(t); | |
71265ae9 PP |
3010 | if (len) |
3011 | { | |
3012 | /* trailing whitespace: seems like a good idea to ignore it too */ | |
3013 | t2 = t + len - 1; | |
3014 | while (isspace(*t2)) t2--; | |
3015 | if (t2 != (t + len)) | |
3016 | { | |
3017 | *++t2 = '\0'; | |
3018 | len = t2 - t; | |
3019 | } | |
3020 | } | |
f3766eb5 | 3021 | DEBUG(D_expand) |
e1d04f48 | 3022 | debug_printf_indent("considering %s: %s\n", ourname, len ? t : US"<empty>"); |
6a8de854 PP |
3023 | /* logic for the lax case from expand_check_condition(), which also does |
3024 | expands, and the logic is both short and stable enough that there should | |
3025 | be no maintenance burden from replicating it. */ | |
f3766eb5 NM |
3026 | if (len == 0) |
3027 | boolvalue = FALSE; | |
51c7471d JH |
3028 | else if (*t == '-' |
3029 | ? Ustrspn(t+1, "0123456789") == len-1 | |
3030 | : Ustrspn(t, "0123456789") == len) | |
6a8de854 | 3031 | { |
f3766eb5 | 3032 | boolvalue = (Uatoi(t) == 0) ? FALSE : TRUE; |
6a8de854 PP |
3033 | /* expand_check_condition only does a literal string "0" check */ |
3034 | if ((cond_type == ECOND_BOOL_LAX) && (len > 1)) | |
3035 | boolvalue = TRUE; | |
3036 | } | |
f3766eb5 NM |
3037 | else if (strcmpic(t, US"true") == 0 || strcmpic(t, US"yes") == 0) |
3038 | boolvalue = TRUE; | |
3039 | else if (strcmpic(t, US"false") == 0 || strcmpic(t, US"no") == 0) | |
3040 | boolvalue = FALSE; | |
6a8de854 PP |
3041 | else if (cond_type == ECOND_BOOL_LAX) |
3042 | boolvalue = TRUE; | |
f3766eb5 NM |
3043 | else |
3044 | { | |
3045 | expand_string_message = string_sprintf("unrecognised boolean " | |
3046 | "value \"%s\"", t); | |
3047 | return NULL; | |
3048 | } | |
e1d04f48 | 3049 | DEBUG(D_expand) debug_printf_indent("%s: condition evaluated to %s\n", ourname, |
c7c833c6 | 3050 | boolvalue? "true":"false"); |
5ee6f336 | 3051 | if (yield != NULL) *yield = (boolvalue == testfor); |
f3766eb5 NM |
3052 | return s; |
3053 | } | |
3054 | ||
059ec3d9 PH |
3055 | /* Unknown condition */ |
3056 | ||
3057 | default: | |
3058 | expand_string_message = string_sprintf("unknown condition \"%s\"", name); | |
3059 | return NULL; | |
3060 | } /* End switch on condition type */ | |
3061 | ||
3062 | /* Missing braces at start and end of data */ | |
3063 | ||
3064 | COND_FAILED_CURLY_START: | |
3065 | expand_string_message = string_sprintf("missing { after \"%s\"", name); | |
3066 | return NULL; | |
3067 | ||
3068 | COND_FAILED_CURLY_END: | |
3069 | expand_string_message = string_sprintf("missing } at end of \"%s\" condition", | |
3070 | name); | |
3071 | return NULL; | |
3072 | ||
3073 | /* A condition requires code that is not compiled */ | |
3074 | ||
3075 | #if !defined(SUPPORT_PAM) || !defined(RADIUS_CONFIG_FILE) || \ | |
3076 | !defined(LOOKUP_LDAP) || !defined(CYRUS_PWCHECK_SOCKET) || \ | |
3077 | !defined(SUPPORT_CRYPTEQ) || !defined(CYRUS_SASLAUTHD_SOCKET) | |
3078 | COND_FAILED_NOT_COMPILED: | |
3079 | expand_string_message = string_sprintf("support for \"%s\" not compiled", | |
3080 | name); | |
3081 | return NULL; | |
3082 | #endif | |
3083 | } | |
3084 | ||
3085 | ||
3086 | ||
3087 | ||
3088 | /************************************************* | |
3089 | * Save numerical variables * | |
3090 | *************************************************/ | |
3091 | ||
3092 | /* This function is called from items such as "if" that want to preserve and | |
3093 | restore the numbered variables. | |
3094 | ||
3095 | Arguments: | |
3096 | save_expand_string points to an array of pointers to set | |
3097 | save_expand_nlength points to an array of ints for the lengths | |
3098 | ||
3099 | Returns: the value of expand max to save | |
3100 | */ | |
3101 | ||
3102 | static int | |
3103 | save_expand_strings(uschar **save_expand_nstring, int *save_expand_nlength) | |
3104 | { | |
3105 | int i; | |
3106 | for (i = 0; i <= expand_nmax; i++) | |
3107 | { | |
3108 | save_expand_nstring[i] = expand_nstring[i]; | |
3109 | save_expand_nlength[i] = expand_nlength[i]; | |
3110 | } | |
3111 | return expand_nmax; | |
3112 | } | |
3113 | ||
3114 | ||
3115 | ||
3116 | /************************************************* | |
3117 | * Restore numerical variables * | |
3118 | *************************************************/ | |
3119 | ||
3120 | /* This function restored saved values of numerical strings. | |
3121 | ||
3122 | Arguments: | |
3123 | save_expand_nmax the number of strings to restore | |
3124 | save_expand_string points to an array of pointers | |
3125 | save_expand_nlength points to an array of ints | |
3126 | ||
3127 | Returns: nothing | |
3128 | */ | |
3129 | ||
3130 | static void | |
3131 | restore_expand_strings(int save_expand_nmax, uschar **save_expand_nstring, | |
3132 | int *save_expand_nlength) | |
3133 | { | |
3134 | int i; | |
3135 | expand_nmax = save_expand_nmax; | |
3136 | for (i = 0; i <= expand_nmax; i++) | |
3137 | { | |
3138 | expand_nstring[i] = save_expand_nstring[i]; | |
3139 | expand_nlength[i] = save_expand_nlength[i]; | |
3140 | } | |
3141 | } | |
3142 | ||
3143 | ||
3144 | ||
3145 | ||
3146 | ||
3147 | /************************************************* | |
3148 | * Handle yes/no substrings * | |
3149 | *************************************************/ | |
3150 | ||
3151 | /* This function is used by ${if}, ${lookup} and ${extract} to handle the | |
3152 | alternative substrings that depend on whether or not the condition was true, | |
3153 | or the lookup or extraction succeeded. The substrings always have to be | |
3154 | expanded, to check their syntax, but "skipping" is set when the result is not | |
3155 | needed - this avoids unnecessary nested lookups. | |
3156 | ||
3157 | Arguments: | |
3158 | skipping TRUE if we were skipping when this item was reached | |
3159 | yes TRUE if the first string is to be used, else use the second | |
3160 | save_lookup a value to put back into lookup_value before the 2nd expansion | |
3161 | sptr points to the input string pointer | |
acec9514 | 3162 | yieldptr points to the output growable-string pointer |
f90d49f7 JH |
3163 | type "lookup", "if", "extract", "run", "env", "listextract" or |
3164 | "certextract" for error message | |
b0e85a8f JH |
3165 | resetok if not NULL, pointer to flag - write FALSE if unsafe to reset |
3166 | the store. | |
059ec3d9 PH |
3167 | |
3168 | Returns: 0 OK; lookup_value has been reset to save_lookup | |
3169 | 1 expansion failed | |
3170 | 2 expansion failed because of bracketing error | |
3171 | */ | |
3172 | ||
3173 | static int | |
55414b25 | 3174 | process_yesno(BOOL skipping, BOOL yes, uschar *save_lookup, const uschar **sptr, |
acec9514 | 3175 | gstring ** yieldptr, uschar *type, BOOL *resetok) |
059ec3d9 PH |
3176 | { |
3177 | int rc = 0; | |
55414b25 | 3178 | const uschar *s = *sptr; /* Local value */ |
059ec3d9 | 3179 | uschar *sub1, *sub2; |
e47376be | 3180 | const uschar * errwhere; |
059ec3d9 PH |
3181 | |
3182 | /* If there are no following strings, we substitute the contents of $value for | |
063b1e99 | 3183 | lookups and for extractions in the success case. For the ${if item, the string |
8e669ac1 | 3184 | "true" is substituted. In the fail case, nothing is substituted for all three |
063b1e99 | 3185 | items. */ |
059ec3d9 PH |
3186 | |
3187 | while (isspace(*s)) s++; | |
3188 | if (*s == '}') | |
3189 | { | |
9e09521e JH |
3190 | if (type[0] == 'i') |
3191 | { | |
3192 | if (yes && !skipping) | |
acec9514 | 3193 | *yieldptr = string_catn(*yieldptr, US"true", 4); |
9e09521e JH |
3194 | } |
3195 | else | |
3196 | { | |
3197 | if (yes && lookup_value && !skipping) | |
acec9514 | 3198 | *yieldptr = string_cat(*yieldptr, lookup_value); |
9e09521e JH |
3199 | lookup_value = save_lookup; |
3200 | } | |
059ec3d9 PH |
3201 | s++; |
3202 | goto RETURN; | |
3203 | } | |
3204 | ||
9b4768fa PH |
3205 | /* The first following string must be braced. */ |
3206 | ||
e47376be JH |
3207 | if (*s++ != '{') |
3208 | { | |
3209 | errwhere = US"'yes' part did not start with '{'"; | |
3210 | goto FAILED_CURLY; | |
3211 | } | |
9b4768fa | 3212 | |
059ec3d9 PH |
3213 | /* Expand the first substring. Forced failures are noticed only if we actually |
3214 | want this string. Set skipping in the call in the fail case (this will always | |
3215 | be the case if we were already skipping). */ | |
3216 | ||
b0e85a8f | 3217 | sub1 = expand_string_internal(s, TRUE, &s, !yes, TRUE, resetok); |
059ec3d9 PH |
3218 | if (sub1 == NULL && (yes || !expand_string_forcedfail)) goto FAILED; |
3219 | expand_string_forcedfail = FALSE; | |
e47376be JH |
3220 | if (*s++ != '}') |
3221 | { | |
3222 | errwhere = US"'yes' part did not end with '}'"; | |
3223 | goto FAILED_CURLY; | |
3224 | } | |
059ec3d9 PH |
3225 | |
3226 | /* If we want the first string, add it to the output */ | |
3227 | ||
3228 | if (yes) | |
acec9514 | 3229 | *yieldptr = string_cat(*yieldptr, sub1); |
059ec3d9 | 3230 | |
fa01e4f8 JH |
3231 | /* If this is called from a lookup/env or a (cert)extract, we want to restore |
3232 | $value to what it was at the start of the item, so that it has this value | |
3233 | during the second string expansion. For the call from "if" or "run" to this | |
3234 | function, save_lookup is set to lookup_value, so that this statement does | |
3235 | nothing. */ | |
059ec3d9 PH |
3236 | |
3237 | lookup_value = save_lookup; | |
3238 | ||
3239 | /* There now follows either another substring, or "fail", or nothing. This | |
3240 | time, forced failures are noticed only if we want the second string. We must | |
3241 | set skipping in the nested call if we don't want this string, or if we were | |
3242 | already skipping. */ | |
3243 | ||
3244 | while (isspace(*s)) s++; | |
3245 | if (*s == '{') | |
3246 | { | |
b0e85a8f | 3247 | sub2 = expand_string_internal(s+1, TRUE, &s, yes || skipping, TRUE, resetok); |
059ec3d9 PH |
3248 | if (sub2 == NULL && (!yes || !expand_string_forcedfail)) goto FAILED; |
3249 | expand_string_forcedfail = FALSE; | |
e47376be JH |
3250 | if (*s++ != '}') |
3251 | { | |
3252 | errwhere = US"'no' part did not start with '{'"; | |
3253 | goto FAILED_CURLY; | |
3254 | } | |
059ec3d9 PH |
3255 | |
3256 | /* If we want the second string, add it to the output */ | |
3257 | ||
3258 | if (!yes) | |
acec9514 | 3259 | *yieldptr = string_cat(*yieldptr, sub2); |
059ec3d9 PH |
3260 | } |
3261 | ||
3262 | /* If there is no second string, but the word "fail" is present when the use of | |
3263 | the second string is wanted, set a flag indicating it was a forced failure | |
3264 | rather than a syntactic error. Swallow the terminating } in case this is nested | |
3265 | inside another lookup or if or extract. */ | |
3266 | ||
3267 | else if (*s != '}') | |
3268 | { | |
3269 | uschar name[256]; | |
55414b25 JH |
3270 | /* deconst cast ok here as source is s anyway */ |
3271 | s = US read_name(name, sizeof(name), s, US"_"); | |
059ec3d9 PH |
3272 | if (Ustrcmp(name, "fail") == 0) |
3273 | { | |
3274 | if (!yes && !skipping) | |
3275 | { | |
3276 | while (isspace(*s)) s++; | |
e47376be JH |
3277 | if (*s++ != '}') |
3278 | { | |
3279 | errwhere = US"did not close with '}' after forcedfail"; | |
3280 | goto FAILED_CURLY; | |
3281 | } | |
059ec3d9 PH |
3282 | expand_string_message = |
3283 | string_sprintf("\"%s\" failed and \"fail\" requested", type); | |
3284 | expand_string_forcedfail = TRUE; | |
3285 | goto FAILED; | |
3286 | } | |
3287 | } | |
3288 | else | |
3289 | { | |
3290 | expand_string_message = | |
3291 | string_sprintf("syntax error in \"%s\" item - \"fail\" expected", type); | |
3292 | goto FAILED; | |
3293 | } | |
3294 | } | |
3295 | ||
3296 | /* All we have to do now is to check on the final closing brace. */ | |
3297 | ||
3298 | while (isspace(*s)) s++; | |
e47376be JH |
3299 | if (*s++ != '}') |
3300 | { | |
3301 | errwhere = US"did not close with '}'"; | |
3302 | goto FAILED_CURLY; | |
3303 | } | |
059ec3d9 | 3304 | |
059ec3d9 PH |
3305 | |
3306 | RETURN: | |
e47376be | 3307 | /* Update the input pointer value before returning */ |
059ec3d9 PH |
3308 | *sptr = s; |
3309 | return rc; | |
e47376be JH |
3310 | |
3311 | FAILED_CURLY: | |
3312 | /* Get here if there is a bracketing failure */ | |
3313 | expand_string_message = string_sprintf( | |
3314 | "curly-bracket problem in conditional yes/no parsing: %s\n" | |
3315 | " remaining string is '%s'", errwhere, --s); | |
3316 | rc = 2; | |
3317 | goto RETURN; | |
3318 | ||
3319 | FAILED: | |
3320 | /* Get here for other failures */ | |
3321 | rc = 1; | |
3322 | goto RETURN; | |
059ec3d9 PH |
3323 | } |
3324 | ||
3325 | ||
3326 | ||
3327 | ||
059ec3d9 PH |
3328 | /************************************************* |
3329 | * Handle MD5 or SHA-1 computation for HMAC * | |
3330 | *************************************************/ | |
3331 | ||
3332 | /* These are some wrapping functions that enable the HMAC code to be a bit | |
3333 | cleaner. A good compiler will spot the tail recursion. | |
3334 | ||
3335 | Arguments: | |
3336 | type HMAC_MD5 or HMAC_SHA1 | |
3337 | remaining are as for the cryptographic hash functions | |
3338 | ||
3339 | Returns: nothing | |
3340 | */ | |
3341 | ||
3342 | static void | |
3343 | chash_start(int type, void *base) | |
3344 | { | |
3345 | if (type == HMAC_MD5) | |
3346 | md5_start((md5 *)base); | |
3347 | else | |
5fb822fc | 3348 | sha1_start((hctx *)base); |
059ec3d9 PH |
3349 | } |
3350 | ||
3351 | static void | |
3352 | chash_mid(int type, void *base, uschar *string) | |
3353 | { | |
3354 | if (type == HMAC_MD5) | |
3355 | md5_mid((md5 *)base, string); | |
3356 | else | |
5fb822fc | 3357 | sha1_mid((hctx *)base, string); |
059ec3d9 PH |
3358 | } |
3359 | ||
3360 | static void | |
3361 | chash_end(int type, void *base, uschar *string, int length, uschar *digest) | |
3362 | { | |
3363 | if (type == HMAC_MD5) | |
3364 | md5_end((md5 *)base, string, length, digest); | |
3365 | else | |
5fb822fc | 3366 | sha1_end((hctx *)base, string, length, digest); |
059ec3d9 PH |
3367 | } |
3368 | ||
3369 | ||
3370 | ||
3371 | ||
3372 | ||
1549ea3b PH |
3373 | /******************************************************** |
3374 | * prvs: Get last three digits of days since Jan 1, 1970 * | |
3375 | ********************************************************/ | |
3376 | ||
3377 | /* This is needed to implement the "prvs" BATV reverse | |
3378 | path signing scheme | |
3379 | ||
3380 | Argument: integer "days" offset to add or substract to | |
3381 | or from the current number of days. | |
3382 | ||
3383 | Returns: pointer to string containing the last three | |
3384 | digits of the number of days since Jan 1, 1970, | |
3385 | modified by the offset argument, NULL if there | |
3386 | was an error in the conversion. | |
3387 | ||
3388 | */ | |
3389 | ||
3390 | static uschar * | |
3391 | prvs_daystamp(int day_offset) | |
3392 | { | |
a86229cf PH |
3393 | uschar *days = store_get(32); /* Need at least 24 for cases */ |
3394 | (void)string_format(days, 32, TIME_T_FMT, /* where TIME_T_FMT is %lld */ | |
1549ea3b | 3395 | (time(NULL) + day_offset*86400)/86400); |
e169f567 | 3396 | return (Ustrlen(days) >= 3) ? &days[Ustrlen(days)-3] : US"100"; |
1549ea3b PH |
3397 | } |
3398 | ||
3399 | ||
3400 | ||
3401 | /******************************************************** | |
3402 | * prvs: perform HMAC-SHA1 computation of prvs bits * | |
3403 | ********************************************************/ | |
3404 | ||
3405 | /* This is needed to implement the "prvs" BATV reverse | |
3406 | path signing scheme | |
3407 | ||
3408 | Arguments: | |
3409 | address RFC2821 Address to use | |
3410 | key The key to use (must be less than 64 characters | |
3411 | in size) | |
3412 | key_num Single-digit key number to use. Defaults to | |
3413 | '0' when NULL. | |
3414 | ||
3415 | Returns: pointer to string containing the first three | |
3416 | bytes of the final hash in hex format, NULL if | |
3417 | there was an error in the process. | |
3418 | */ | |
3419 | ||
3420 | static uschar * | |
3421 | prvs_hmac_sha1(uschar *address, uschar *key, uschar *key_num, uschar *daystamp) | |
3422 | { | |
acec9514 JH |
3423 | gstring * hash_source; |
3424 | uschar * p; | |
3425 | int i; | |
5fb822fc | 3426 | hctx h; |
1549ea3b PH |
3427 | uschar innerhash[20]; |
3428 | uschar finalhash[20]; | |
3429 | uschar innerkey[64]; | |
3430 | uschar outerkey[64]; | |
3431 | uschar *finalhash_hex = store_get(40); | |
3432 | ||
3433 | if (key_num == NULL) | |
3434 | key_num = US"0"; | |
3435 | ||
3436 | if (Ustrlen(key) > 64) | |
3437 | return NULL; | |
3438 | ||
acec9514 JH |
3439 | hash_source = string_catn(NULL, key_num, 1); |
3440 | hash_source = string_catn(hash_source, daystamp, 3); | |
3441 | hash_source = string_cat(hash_source, address); | |
3442 | (void) string_from_gstring(hash_source); | |
1549ea3b | 3443 | |
acec9514 JH |
3444 | DEBUG(D_expand) |
3445 | debug_printf_indent("prvs: hash source is '%s'\n", hash_source->s); | |
1549ea3b PH |
3446 | |
3447 | memset(innerkey, 0x36, 64); | |
3448 | memset(outerkey, 0x5c, 64); | |
3449 | ||
3450 | for (i = 0; i < Ustrlen(key); i++) | |
3451 | { | |
3452 | innerkey[i] ^= key[i]; | |
3453 | outerkey[i] ^= key[i]; | |
3454 | } | |
3455 | ||
5fb822fc JH |
3456 | chash_start(HMAC_SHA1, &h); |
3457 | chash_mid(HMAC_SHA1, &h, innerkey); | |
acec9514 | 3458 | chash_end(HMAC_SHA1, &h, hash_source->s, hash_source->ptr, innerhash); |
1549ea3b | 3459 | |
5fb822fc JH |
3460 | chash_start(HMAC_SHA1, &h); |
3461 | chash_mid(HMAC_SHA1, &h, outerkey); | |
3462 | chash_end(HMAC_SHA1, &h, innerhash, 20, finalhash); | |
1549ea3b PH |
3463 | |
3464 | p = finalhash_hex; | |
3465 | for (i = 0; i < 3; i++) | |
3466 | { | |
3467 | *p++ = hex_digits[(finalhash[i] & 0xf0) >> 4]; | |
3468 | *p++ = hex_digits[finalhash[i] & 0x0f]; | |
3469 | } | |
3470 | *p = '\0'; | |
3471 | ||
3472 | return finalhash_hex; | |
3473 | } | |
3474 | ||
3475 | ||
3476 | ||
3477 | ||
059ec3d9 PH |
3478 | /************************************************* |
3479 | * Join a file onto the output string * | |
3480 | *************************************************/ | |
3481 | ||
fa01e4f8 JH |
3482 | /* This is used for readfile/readsock and after a run expansion. |
3483 | It joins the contents of a file onto the output string, globally replacing | |
3484 | newlines with a given string (optionally). | |
059ec3d9 PH |
3485 | |
3486 | Arguments: | |
3487 | f the FILE | |
acec9514 | 3488 | yield pointer to the expandable string struct |
059ec3d9 PH |
3489 | eol newline replacement string, or NULL |
3490 | ||
acec9514 | 3491 | Returns: new pointer for expandable string, terminated if non-null |
059ec3d9 PH |
3492 | */ |
3493 | ||
acec9514 JH |
3494 | static gstring * |
3495 | cat_file(FILE *f, gstring *yield, uschar *eol) | |
059ec3d9 | 3496 | { |
059ec3d9 PH |
3497 | uschar buffer[1024]; |
3498 | ||
fa01e4f8 | 3499 | while (Ufgets(buffer, sizeof(buffer), f)) |
059ec3d9 PH |
3500 | { |
3501 | int len = Ustrlen(buffer); | |
fa01e4f8 | 3502 | if (eol && buffer[len-1] == '\n') len--; |
acec9514 | 3503 | yield = string_catn(yield, buffer, len); |
8487aee9 | 3504 | if (eol && buffer[len]) |
acec9514 | 3505 | yield = string_cat(yield, eol); |
059ec3d9 PH |
3506 | } |
3507 | ||
acec9514 | 3508 | (void) string_from_gstring(yield); |
059ec3d9 PH |
3509 | return yield; |
3510 | } | |
3511 | ||
3512 | ||
3513 | ||
3514 | ||
3515 | /************************************************* | |
3516 | * Evaluate numeric expression * | |
3517 | *************************************************/ | |
3518 | ||
af561417 PH |
3519 | /* This is a set of mutually recursive functions that evaluate an arithmetic |
3520 | expression involving + - * / % & | ^ ~ << >> and parentheses. The only one of | |
3521 | these functions that is called from elsewhere is eval_expr, whose interface is: | |
059ec3d9 PH |
3522 | |
3523 | Arguments: | |
af561417 PH |
3524 | sptr pointer to the pointer to the string - gets updated |
3525 | decimal TRUE if numbers are to be assumed decimal | |
3526 | error pointer to where to put an error message - must be NULL on input | |
3527 | endket TRUE if ')' must terminate - FALSE for external call | |
059ec3d9 | 3528 | |
af561417 PH |
3529 | Returns: on success: the value of the expression, with *error still NULL |
3530 | on failure: an undefined value, with *error = a message | |
059ec3d9 PH |
3531 | */ |
3532 | ||
97d17305 | 3533 | static int_eximarith_t eval_op_or(uschar **, BOOL, uschar **); |
af561417 | 3534 | |
059ec3d9 | 3535 | |
97d17305 | 3536 | static int_eximarith_t |
059ec3d9 PH |
3537 | eval_expr(uschar **sptr, BOOL decimal, uschar **error, BOOL endket) |
3538 | { | |
3539 | uschar *s = *sptr; | |
97d17305 | 3540 | int_eximarith_t x = eval_op_or(&s, decimal, error); |
059ec3d9 PH |
3541 | if (*error == NULL) |
3542 | { | |
af561417 | 3543 | if (endket) |
059ec3d9 | 3544 | { |
af561417 PH |
3545 | if (*s != ')') |
3546 | *error = US"expecting closing parenthesis"; | |
3547 | else | |
3548 | while (isspace(*(++s))); | |
059ec3d9 | 3549 | } |
af561417 | 3550 | else if (*s != 0) *error = US"expecting operator"; |
059ec3d9 | 3551 | } |
059ec3d9 PH |
3552 | *sptr = s; |
3553 | return x; | |
3554 | } | |
3555 | ||
af561417 | 3556 | |
97d17305 | 3557 | static int_eximarith_t |
af561417 | 3558 | eval_number(uschar **sptr, BOOL decimal, uschar **error) |
059ec3d9 PH |
3559 | { |
3560 | register int c; | |
97d17305 | 3561 | int_eximarith_t n; |
059ec3d9 PH |
3562 | uschar *s = *sptr; |
3563 | while (isspace(*s)) s++; | |
3564 | c = *s; | |
af561417 | 3565 | if (isdigit(c)) |
059ec3d9 PH |
3566 | { |
3567 | int count; | |
97d17305 | 3568 | (void)sscanf(CS s, (decimal? SC_EXIM_DEC "%n" : SC_EXIM_ARITH "%n"), &n, &count); |
059ec3d9 | 3569 | s += count; |
97d17305 JH |
3570 | switch (tolower(*s)) |
3571 | { | |
3572 | default: break; | |
3573 | case 'k': n *= 1024; s++; break; | |
3574 | case 'm': n *= 1024*1024; s++; break; | |
3575 | case 'g': n *= 1024*1024*1024; s++; break; | |
3576 | } | |
059ec3d9 PH |
3577 | while (isspace (*s)) s++; |
3578 | } | |
3579 | else if (c == '(') | |
3580 | { | |
3581 | s++; | |
3582 | n = eval_expr(&s, decimal, error, 1); | |
3583 | } | |
3584 | else | |
3585 | { | |
3586 | *error = US"expecting number or opening parenthesis"; | |
3587 | n = 0; | |
3588 | } | |
3589 | *sptr = s; | |
3590 | return n; | |
3591 | } | |
3592 | ||
af561417 | 3593 | |
97d17305 | 3594 | static int_eximarith_t |
aa7c82b2 | 3595 | eval_op_unary(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3596 | { |
3597 | uschar *s = *sptr; | |
97d17305 | 3598 | int_eximarith_t x; |
af561417 PH |
3599 | while (isspace(*s)) s++; |
3600 | if (*s == '+' || *s == '-' || *s == '~') | |
3601 | { | |
3602 | int op = *s++; | |
3603 | x = eval_op_unary(&s, decimal, error); | |
3604 | if (op == '-') x = -x; | |
3605 | else if (op == '~') x = ~x; | |
3606 | } | |
3607 | else | |
3608 | { | |
3609 | x = eval_number(&s, decimal, error); | |
3610 | } | |
3611 | *sptr = s; | |
3612 | return x; | |
3613 | } | |
3614 | ||
3615 | ||
97d17305 | 3616 | static int_eximarith_t |
aa7c82b2 | 3617 | eval_op_mult(uschar **sptr, BOOL decimal, uschar **error) |
059ec3d9 PH |
3618 | { |
3619 | uschar *s = *sptr; | |
97d17305 | 3620 | int_eximarith_t x = eval_op_unary(&s, decimal, error); |
059ec3d9 PH |
3621 | if (*error == NULL) |
3622 | { | |
5591031b | 3623 | while (*s == '*' || *s == '/' || *s == '%') |
059ec3d9 PH |
3624 | { |
3625 | int op = *s++; | |
97d17305 | 3626 | int_eximarith_t y = eval_op_unary(&s, decimal, error); |
059ec3d9 | 3627 | if (*error != NULL) break; |
053a9aa3 PP |
3628 | /* SIGFPE both on div/mod by zero and on INT_MIN / -1, which would give |
3629 | * a value of INT_MAX+1. Note that INT_MIN * -1 gives INT_MIN for me, which | |
3630 | * is a bug somewhere in [gcc 4.2.1, FreeBSD, amd64]. In fact, -N*-M where | |
4c04137d | 3631 | * -N*M is INT_MIN will yield INT_MIN. |
053a9aa3 PP |
3632 | * Since we don't support floating point, this is somewhat simpler. |
3633 | * Ideally, we'd return an error, but since we overflow for all other | |
3634 | * arithmetic, consistency suggests otherwise, but what's the correct value | |
3635 | * to use? There is none. | |
3636 | * The C standard guarantees overflow for unsigned arithmetic but signed | |
3637 | * overflow invokes undefined behaviour; in practice, this is overflow | |
3638 | * except for converting INT_MIN to INT_MAX+1. We also can't guarantee | |
3639 | * that long/longlong larger than int are available, or we could just work | |
3640 | * with larger types. We should consider whether to guarantee 32bit eval | |
3641 | * and 64-bit working variables, with errors returned. For now ... | |
3642 | * So, the only SIGFPEs occur with a non-shrinking div/mod, thus -1; we | |
3643 | * can just let the other invalid results occur otherwise, as they have | |
3644 | * until now. For this one case, we can coerce. | |
3645 | */ | |
4328fd3c | 3646 | if (y == -1 && x == EXIM_ARITH_MIN && op != '*') |
053a9aa3 PP |
3647 | { |
3648 | DEBUG(D_expand) | |
97d17305 | 3649 | debug_printf("Integer exception dodging: " PR_EXIM_ARITH "%c-1 coerced to " PR_EXIM_ARITH "\n", |
4328fd3c JH |
3650 | EXIM_ARITH_MIN, op, EXIM_ARITH_MAX); |
3651 | x = EXIM_ARITH_MAX; | |
053a9aa3 PP |
3652 | continue; |
3653 | } | |
a5b52695 PP |
3654 | if (op == '*') |
3655 | x *= y; | |
3656 | else | |
3657 | { | |
3658 | if (y == 0) | |
54e7ce4a | 3659 | { |
a5b52695 PP |
3660 | *error = (op == '/') ? US"divide by zero" : US"modulo by zero"; |
3661 | x = 0; | |
3662 | break; | |
54e7ce4a | 3663 | } |
a5b52695 PP |
3664 | if (op == '/') |
3665 | x /= y; | |
3666 | else | |
3667 | x %= y; | |
3668 | } | |
059ec3d9 PH |
3669 | } |
3670 | } | |
3671 | *sptr = s; | |
3672 | return x; | |
3673 | } | |
3674 | ||
3675 | ||
97d17305 | 3676 | static int_eximarith_t |
aa7c82b2 | 3677 | eval_op_sum(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3678 | { |
3679 | uschar *s = *sptr; | |
97d17305 | 3680 | int_eximarith_t x = eval_op_mult(&s, decimal, error); |
6e3b198d | 3681 | if (!*error) |
af561417 PH |
3682 | { |
3683 | while (*s == '+' || *s == '-') | |
3684 | { | |
3685 | int op = *s++; | |
97d17305 | 3686 | int_eximarith_t y = eval_op_mult(&s, decimal, error); |
6e3b198d JH |
3687 | if (*error) break; |
3688 | if ( (x >= EXIM_ARITH_MAX/2 && x >= EXIM_ARITH_MAX/2) | |
3689 | || (x <= -(EXIM_ARITH_MAX/2) && y <= -(EXIM_ARITH_MAX/2))) | |
3690 | { /* over-conservative check */ | |
3691 | *error = op == '+' | |
3692 | ? US"overflow in sum" : US"overflow in difference"; | |
3693 | break; | |
3694 | } | |
af561417 PH |
3695 | if (op == '+') x += y; else x -= y; |
3696 | } | |
3697 | } | |
3698 | *sptr = s; | |
3699 | return x; | |
3700 | } | |
3701 | ||
3702 | ||
97d17305 | 3703 | static int_eximarith_t |
aa7c82b2 | 3704 | eval_op_shift(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3705 | { |
3706 | uschar *s = *sptr; | |
97d17305 | 3707 | int_eximarith_t x = eval_op_sum(&s, decimal, error); |
af561417 PH |
3708 | if (*error == NULL) |
3709 | { | |
3710 | while ((*s == '<' || *s == '>') && s[1] == s[0]) | |
3711 | { | |
97d17305 | 3712 | int_eximarith_t y; |
af561417 PH |
3713 | int op = *s++; |
3714 | s++; | |
3715 | y = eval_op_sum(&s, decimal, error); | |
3716 | if (*error != NULL) break; | |
3717 | if (op == '<') x <<= y; else x >>= y; | |
3718 | } | |
3719 | } | |
3720 | *sptr = s; | |
3721 | return x; | |
3722 | } | |
3723 | ||
3724 | ||
97d17305 | 3725 | static int_eximarith_t |
aa7c82b2 | 3726 | eval_op_and(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3727 | { |
3728 | uschar *s = *sptr; | |
97d17305 | 3729 | int_eximarith_t x = eval_op_shift(&s, decimal, error); |
af561417 PH |
3730 | if (*error == NULL) |
3731 | { | |
3732 | while (*s == '&') | |
3733 | { | |
97d17305 | 3734 | int_eximarith_t y; |
af561417 PH |
3735 | s++; |
3736 | y = eval_op_shift(&s, decimal, error); | |
3737 | if (*error != NULL) break; | |
3738 | x &= y; | |
3739 | } | |
3740 | } | |
3741 | *sptr = s; | |
3742 | return x; | |
3743 | } | |
3744 | ||
3745 | ||
97d17305 | 3746 | static int_eximarith_t |
aa7c82b2 | 3747 | eval_op_xor(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3748 | { |
3749 | uschar *s = *sptr; | |
97d17305 | 3750 | int_eximarith_t x = eval_op_and(&s, decimal, error); |
af561417 PH |
3751 | if (*error == NULL) |
3752 | { | |
3753 | while (*s == '^') | |
3754 | { | |
97d17305 | 3755 | int_eximarith_t y; |
af561417 PH |
3756 | s++; |
3757 | y = eval_op_and(&s, decimal, error); | |
3758 | if (*error != NULL) break; | |
3759 | x ^= y; | |
3760 | } | |
3761 | } | |
3762 | *sptr = s; | |
3763 | return x; | |
3764 | } | |
3765 | ||
3766 | ||
97d17305 | 3767 | static int_eximarith_t |
aa7c82b2 | 3768 | eval_op_or(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3769 | { |
3770 | uschar *s = *sptr; | |
97d17305 | 3771 | int_eximarith_t x = eval_op_xor(&s, decimal, error); |
af561417 PH |
3772 | if (*error == NULL) |
3773 | { | |
3774 | while (*s == '|') | |
3775 | { | |
97d17305 | 3776 | int_eximarith_t y; |
af561417 PH |
3777 | s++; |
3778 | y = eval_op_xor(&s, decimal, error); | |
3779 | if (*error != NULL) break; | |
3780 | x |= y; | |
3781 | } | |
3782 | } | |
3783 | *sptr = s; | |
3784 | return x; | |
3785 | } | |
3786 | ||
059ec3d9 PH |
3787 | |
3788 | ||
3789 | /************************************************* | |
3790 | * Expand string * | |
3791 | *************************************************/ | |
3792 | ||
3793 | /* Returns either an unchanged string, or the expanded string in stacking pool | |
3794 | store. Interpreted sequences are: | |
3795 | ||
3796 | \... normal escaping rules | |
3797 | $name substitutes the variable | |
3798 | ${name} ditto | |
3799 | ${op:string} operates on the expanded string value | |
3800 | ${item{arg1}{arg2}...} expands the args and then does the business | |
3801 | some literal args are not enclosed in {} | |
3802 | ||
3803 | There are now far too many operators and item types to make it worth listing | |
3804 | them here in detail any more. | |
3805 | ||
3806 | We use an internal routine recursively to handle embedded substrings. The | |
3807 | external function follows. The yield is NULL if the expansion failed, and there | |
3808 | are two cases: if something collapsed syntactically, or if "fail" was given | |
4c04137d | 3809 | as the action on a lookup failure. These can be distinguished by looking at the |
059ec3d9 PH |
3810 | variable expand_string_forcedfail, which is TRUE in the latter case. |
3811 | ||
3812 | The skipping flag is set true when expanding a substring that isn't actually | |
3813 | going to be used (after "if" or "lookup") and it prevents lookups from | |
3814 | happening lower down. | |
3815 | ||
3816 | Store usage: At start, a store block of the length of the input plus 64 | |
3817 | is obtained. This is expanded as necessary by string_cat(), which might have to | |
3818 | get a new block, or might be able to expand the original. At the end of the | |
3819 | function we can release any store above that portion of the yield block that | |
3820 | was actually used. In many cases this will be optimal. | |
3821 | ||
3822 | However: if the first item in the expansion is a variable name or header name, | |
3823 | we reset the store before processing it; if the result is in fresh store, we | |
3824 | use that without copying. This is helpful for expanding strings like | |
3825 | $message_headers which can get very long. | |
3826 | ||
d6b4d938 TF |
3827 | There's a problem if a ${dlfunc item has side-effects that cause allocation, |
3828 | since resetting the store at the end of the expansion will free store that was | |
3829 | allocated by the plugin code as well as the slop after the expanded string. So | |
b0e85a8f JH |
3830 | we skip any resets if ${dlfunc } has been used. The same applies for ${acl } |
3831 | and, given the acl condition, ${if }. This is an unfortunate consequence of | |
3832 | string expansion becoming too powerful. | |
d6b4d938 | 3833 | |
059ec3d9 PH |
3834 | Arguments: |
3835 | string the string to be expanded | |
3836 | ket_ends true if expansion is to stop at } | |
3837 | left if not NULL, a pointer to the first character after the | |
3838 | expansion is placed here (typically used with ket_ends) | |
3839 | skipping TRUE for recursive calls when the value isn't actually going | |
3840 | to be used (to allow for optimisation) | |
da6dbe26 PP |
3841 | honour_dollar TRUE if $ is to be expanded, |
3842 | FALSE if it's just another character | |
b0e85a8f JH |
3843 | resetok_p if not NULL, pointer to flag - write FALSE if unsafe to reset |
3844 | the store. | |
059ec3d9 PH |
3845 | |
3846 | Returns: NULL if expansion fails: | |
3847 | expand_string_forcedfail is set TRUE if failure was forced | |
3848 | expand_string_message contains a textual error message | |
3849 | a pointer to the expanded string on success | |
3850 | */ | |
3851 | ||
3852 | static uschar * | |
55414b25 | 3853 | expand_string_internal(const uschar *string, BOOL ket_ends, const uschar **left, |
b0e85a8f | 3854 | BOOL skipping, BOOL honour_dollar, BOOL *resetok_p) |
059ec3d9 | 3855 | { |
acec9514 | 3856 | gstring * yield = string_get(Ustrlen(string) + 64); |
5f5be492 | 3857 | int item_type; |
55414b25 | 3858 | const uschar *s = string; |
059ec3d9 PH |
3859 | uschar *save_expand_nstring[EXPAND_MAXN+1]; |
3860 | int save_expand_nlength[EXPAND_MAXN+1]; | |
d6b4d938 | 3861 | BOOL resetok = TRUE; |
059ec3d9 | 3862 | |
e1d04f48 | 3863 | expand_level++; |
e47376be | 3864 | DEBUG(D_expand) |
1b37ac39 JH |
3865 | debug_printf_indent(UTF8_DOWN_RIGHT "%s: %s\n", |
3866 | skipping | |
3867 | ? UTF8_HORIZ UTF8_HORIZ UTF8_HORIZ "scanning" | |
3868 | : "considering", | |
3869 | string); | |
e47376be | 3870 | |
059ec3d9 PH |
3871 | expand_string_forcedfail = FALSE; |
3872 | expand_string_message = US""; | |
3873 | ||
3874 | while (*s != 0) | |
3875 | { | |
3876 | uschar *value; | |
3877 | uschar name[256]; | |
3878 | ||
3879 | /* \ escapes the next character, which must exist, or else | |
3880 | the expansion fails. There's a special escape, \N, which causes | |
3881 | copying of the subject verbatim up to the next \N. Otherwise, | |
3882 | the escapes are the standard set. */ | |
3883 | ||
3884 | if (*s == '\\') | |
3885 | { | |
3886 | if (s[1] == 0) | |
3887 | { | |
3888 | expand_string_message = US"\\ at end of string"; | |
3889 | goto EXPAND_FAILED; | |
3890 | } | |
3891 | ||
3892 | if (s[1] == 'N') | |
3893 | { | |
55414b25 | 3894 | const uschar * t = s + 2; |
059ec3d9 | 3895 | for (s = t; *s != 0; s++) if (*s == '\\' && s[1] == 'N') break; |
acec9514 | 3896 | yield = string_catn(yield, t, s - t); |
059ec3d9 PH |
3897 | if (*s != 0) s += 2; |
3898 | } | |
3899 | ||
3900 | else | |
3901 | { | |
3902 | uschar ch[1]; | |
3903 | ch[0] = string_interpret_escape(&s); | |
3904 | s++; | |
acec9514 | 3905 | yield = string_catn(yield, ch, 1); |
059ec3d9 PH |
3906 | } |
3907 | ||
3908 | continue; | |
3909 | } | |
3910 | ||
2e23003a | 3911 | /*{*/ |
059ec3d9 PH |
3912 | /* Anything other than $ is just copied verbatim, unless we are |
3913 | looking for a terminating } character. */ | |
3914 | ||
2e23003a | 3915 | /*{*/ |
059ec3d9 PH |
3916 | if (ket_ends && *s == '}') break; |
3917 | ||
da6dbe26 | 3918 | if (*s != '$' || !honour_dollar) |
059ec3d9 | 3919 | { |
acec9514 | 3920 | yield = string_catn(yield, s++, 1); |
059ec3d9 PH |
3921 | continue; |
3922 | } | |
3923 | ||
3924 | /* No { after the $ - must be a plain name or a number for string | |
3925 | match variable. There has to be a fudge for variables that are the | |
3926 | names of header fields preceded by "$header_" because header field | |
3927 | names can contain any printing characters except space and colon. | |
3928 | For those that don't like typing this much, "$h_" is a synonym for | |
3929 | "$header_". A non-existent header yields a NULL value; nothing is | |
2e23003a | 3930 | inserted. */ /*}*/ |
059ec3d9 PH |
3931 | |
3932 | if (isalpha((*(++s)))) | |
3933 | { | |
3934 | int len; | |
3935 | int newsize = 0; | |
bb07bcd3 | 3936 | gstring * g = NULL; |
059ec3d9 PH |
3937 | |
3938 | s = read_name(name, sizeof(name), s, US"_"); | |
3939 | ||
3940 | /* If this is the first thing to be expanded, release the pre-allocated | |
3941 | buffer. */ | |
3942 | ||
bb07bcd3 JH |
3943 | if (!yield) |
3944 | g = store_get(sizeof(gstring)); | |
3945 | else if (yield->ptr == 0) | |
059ec3d9 | 3946 | { |
d6b4d938 | 3947 | if (resetok) store_reset(yield); |
059ec3d9 | 3948 | yield = NULL; |
bb07bcd3 | 3949 | g = store_get(sizeof(gstring)); /* alloc _before_ calling find_variable() */ |
059ec3d9 PH |
3950 | } |
3951 | ||
3952 | /* Header */ | |
3953 | ||
3954 | if (Ustrncmp(name, "h_", 2) == 0 || | |
3955 | Ustrncmp(name, "rh_", 3) == 0 || | |
3956 | Ustrncmp(name, "bh_", 3) == 0 || | |
3957 | Ustrncmp(name, "header_", 7) == 0 || | |
3958 | Ustrncmp(name, "rheader_", 8) == 0 || | |
3959 | Ustrncmp(name, "bheader_", 8) == 0) | |
3960 | { | |
3961 | BOOL want_raw = (name[0] == 'r')? TRUE : FALSE; | |
3962 | uschar *charset = (name[0] == 'b')? NULL : headers_charset; | |
3963 | s = read_header_name(name, sizeof(name), s); | |
3964 | value = find_header(name, FALSE, &newsize, want_raw, charset); | |
3965 | ||
3966 | /* If we didn't find the header, and the header contains a closing brace | |
0d85fa3f | 3967 | character, this may be a user error where the terminating colon |
059ec3d9 PH |
3968 | has been omitted. Set a flag to adjust the error message in this case. |
3969 | But there is no error here - nothing gets inserted. */ | |
3970 | ||
acec9514 | 3971 | if (!value) |
059ec3d9 PH |
3972 | { |
3973 | if (Ustrchr(name, '}') != NULL) malformed_header = TRUE; | |
3974 | continue; | |
3975 | } | |
3976 | } | |
3977 | ||
3978 | /* Variable */ | |
3979 | ||
63df3f26 | 3980 | else if (!(value = find_variable(name, FALSE, skipping, &newsize))) |
059ec3d9 | 3981 | { |
63df3f26 JH |
3982 | expand_string_message = |
3983 | string_sprintf("unknown variable name \"%s\"", name); | |
3984 | check_variable_error_message(name); | |
3985 | goto EXPAND_FAILED; | |
059ec3d9 PH |
3986 | } |
3987 | ||
3988 | /* If the data is known to be in a new buffer, newsize will be set to the | |
3989 | size of that buffer. If this is the first thing in an expansion string, | |
3990 | yield will be NULL; just point it at the new store instead of copying. Many | |
3991 | expansion strings contain just one reference, so this is a useful | |
acec9514 JH |
3992 | optimization, especially for humungous headers. We need to use a gstring |
3993 | structure that is not allocated after that new-buffer, else a later store | |
3994 | reset in the middle of the buffer will make it inaccessible. */ | |
059ec3d9 PH |
3995 | |
3996 | len = Ustrlen(value); | |
acec9514 | 3997 | if (!yield && newsize != 0) |
059ec3d9 | 3998 | { |
acec9514 JH |
3999 | yield = g; |
4000 | yield->size = newsize; | |
4001 | yield->ptr = len; | |
4002 | yield->s = value; | |
059ec3d9 | 4003 | } |
bb07bcd3 JH |
4004 | else |
4005 | yield = string_catn(yield, value, len); | |
059ec3d9 PH |
4006 | |
4007 | continue; | |
4008 | } | |
4009 | ||
4010 | if (isdigit(*s)) | |
4011 | { | |
4012 | int n; | |
55414b25 | 4013 | s = read_cnumber(&n, s); |
059ec3d9 | 4014 | if (n >= 0 && n <= expand_nmax) |
acec9514 | 4015 | yield = string_catn(yield, expand_nstring[n], expand_nlength[n]); |
059ec3d9 PH |
4016 | continue; |
4017 | } | |
4018 | ||
2e23003a | 4019 | /* Otherwise, if there's no '{' after $ it's an error. */ /*}*/ |
059ec3d9 | 4020 | |
2e23003a | 4021 | if (*s != '{') /*}*/ |
059ec3d9 | 4022 | { |
2e23003a | 4023 | expand_string_message = US"$ not followed by letter, digit, or {"; /*}*/ |
059ec3d9 PH |
4024 | goto EXPAND_FAILED; |
4025 | } | |
4026 | ||
4027 | /* After { there can be various things, but they all start with | |
4028 | an initial word, except for a number for a string match variable. */ | |
4029 | ||
4030 | if (isdigit((*(++s)))) | |
4031 | { | |
4032 | int n; | |
55414b25 | 4033 | s = read_cnumber(&n, s); /*{*/ |
059ec3d9 | 4034 | if (*s++ != '}') |
2e23003a | 4035 | { /*{*/ |
059ec3d9 PH |
4036 | expand_string_message = US"} expected after number"; |
4037 | goto EXPAND_FAILED; | |
4038 | } | |
4039 | if (n >= 0 && n <= expand_nmax) | |
acec9514 | 4040 | yield = string_catn(yield, expand_nstring[n], expand_nlength[n]); |
059ec3d9 PH |
4041 | continue; |
4042 | } | |
4043 | ||
4044 | if (!isalpha(*s)) | |
4045 | { | |
2e23003a | 4046 | expand_string_message = US"letter or digit expected after ${"; /*}*/ |
059ec3d9 PH |
4047 | goto EXPAND_FAILED; |
4048 | } | |
4049 | ||
4050 | /* Allow "-" in names to cater for substrings with negative | |
4051 | arguments. Since we are checking for known names after { this is | |
4052 | OK. */ | |
4053 | ||
4054 | s = read_name(name, sizeof(name), s, US"_-"); | |
0539a19d | 4055 | item_type = chop_match(name, item_table, nelem(item_table)); |
059ec3d9 PH |
4056 | |
4057 | switch(item_type) | |
4058 | { | |
525239c1 | 4059 | /* Call an ACL from an expansion. We feed data in via $acl_arg1 - $acl_arg9. |
333eea9c | 4060 | If the ACL returns accept or reject we return content set by "message =" |
723c72e6 JH |
4061 | There is currently no limit on recursion; this would have us call |
4062 | acl_check_internal() directly and get a current level from somewhere. | |
f60d98e8 JH |
4063 | See also the acl expansion condition ECOND_ACL and the traditional |
4064 | acl modifier ACLC_ACL. | |
be7a5781 | 4065 | Assume that the function has side-effects on the store that must be preserved. |
723c72e6 JH |
4066 | */ |
4067 | ||
4068 | case EITEM_ACL: | |
333eea9c | 4069 | /* ${acl {name} {arg1}{arg2}...} */ |
723c72e6 | 4070 | { |
333eea9c | 4071 | uschar *sub[10]; /* name + arg1-arg9 (which must match number of acl_arg[]) */ |
723c72e6 | 4072 | uschar *user_msg; |
333eea9c | 4073 | |
089fc87a JH |
4074 | switch(read_subs(sub, nelem(sub), 1, &s, skipping, TRUE, US"acl", |
4075 | &resetok)) | |
723c72e6 JH |
4076 | { |
4077 | case 1: goto EXPAND_FAILED_CURLY; | |
4078 | case 2: | |
4079 | case 3: goto EXPAND_FAILED; | |
4080 | } | |
4081 | if (skipping) continue; | |
4082 | ||
be7a5781 | 4083 | resetok = FALSE; |
0539a19d | 4084 | switch(eval_acl(sub, nelem(sub), &user_msg)) |
723c72e6 JH |
4085 | { |
4086 | case OK: | |
333eea9c | 4087 | case FAIL: |
187bc588 | 4088 | DEBUG(D_expand) |
e1d04f48 | 4089 | debug_printf_indent("acl expansion yield: %s\n", user_msg); |
723c72e6 | 4090 | if (user_msg) |
acec9514 | 4091 | yield = string_cat(yield, user_msg); |
723c72e6 | 4092 | continue; |
333eea9c | 4093 | |
723c72e6 | 4094 | case DEFER: |
333eea9c | 4095 | expand_string_forcedfail = TRUE; |
6e3b198d | 4096 | /*FALLTHROUGH*/ |
723c72e6 | 4097 | default: |
333eea9c | 4098 | expand_string_message = string_sprintf("error from acl \"%s\"", sub[0]); |
723c72e6 JH |
4099 | goto EXPAND_FAILED; |
4100 | } | |
4101 | } | |
4102 | ||
059ec3d9 PH |
4103 | /* Handle conditionals - preserve the values of the numerical expansion |
4104 | variables in case they get changed by a regular expression match in the | |
4105 | condition. If not, they retain their external settings. At the end | |
4106 | of this "if" section, they get restored to their previous values. */ | |
4107 | ||
4108 | case EITEM_IF: | |
4109 | { | |
4110 | BOOL cond = FALSE; | |
55414b25 | 4111 | const uschar *next_s; |
059ec3d9 PH |
4112 | int save_expand_nmax = |
4113 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
4114 | ||
4115 | while (isspace(*s)) s++; | |
f267271d | 4116 | next_s = eval_condition(s, &resetok, skipping ? NULL : &cond); |
059ec3d9 PH |
4117 | if (next_s == NULL) goto EXPAND_FAILED; /* message already set */ |
4118 | ||
4119 | DEBUG(D_expand) | |
e1d04f48 | 4120 | { |
1b37ac39 JH |
4121 | debug_printf_indent(UTF8_VERT_RIGHT UTF8_HORIZ UTF8_HORIZ |
4122 | "condition: %.*s\n", | |
4123 | (int)(next_s - s), s); | |
4124 | debug_printf_indent(UTF8_VERT_RIGHT UTF8_HORIZ UTF8_HORIZ | |
4125 | UTF8_HORIZ UTF8_HORIZ UTF8_HORIZ | |
4126 | "result: %s\n", | |
4127 | cond ? "true" : "false"); | |
e1d04f48 | 4128 | } |
059ec3d9 PH |
4129 | |
4130 | s = next_s; | |
4131 | ||
4132 | /* The handling of "yes" and "no" result strings is now in a separate | |
4133 | function that is also used by ${lookup} and ${extract} and ${run}. */ | |
4134 | ||
4135 | switch(process_yesno( | |
4136 | skipping, /* were previously skipping */ | |
4137 | cond, /* success/failure indicator */ | |
4138 | lookup_value, /* value to reset for string2 */ | |
4139 | &s, /* input pointer */ | |
4140 | &yield, /* output pointer */ | |
b0e85a8f JH |
4141 | US"if", /* condition type */ |
4142 | &resetok)) | |
059ec3d9 PH |
4143 | { |
4144 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
4145 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
4146 | } | |
4147 | ||
4148 | /* Restore external setting of expansion variables for continuation | |
4149 | at this level. */ | |
4150 | ||
b0e85a8f JH |
4151 | restore_expand_strings(save_expand_nmax, save_expand_nstring, |
4152 | save_expand_nlength); | |
059ec3d9 PH |
4153 | continue; |
4154 | } | |
4155 | ||
8c5d388a | 4156 | #ifdef SUPPORT_I18N |
ed0512a1 JH |
4157 | case EITEM_IMAPFOLDER: |
4158 | { /* ${imapfolder {name}{sep]{specials}} */ | |
4159 | uschar *sub_arg[3]; | |
4160 | uschar *encoded; | |
4161 | ||
0539a19d JH |
4162 | switch(read_subs(sub_arg, nelem(sub_arg), 1, &s, skipping, TRUE, name, |
4163 | &resetok)) | |
ed0512a1 JH |
4164 | { |
4165 | case 1: goto EXPAND_FAILED_CURLY; | |
4166 | case 2: | |
4167 | case 3: goto EXPAND_FAILED; | |
4168 | } | |
4169 | ||
4170 | if (sub_arg[1] == NULL) /* One argument */ | |
4171 | { | |
0539a19d | 4172 | sub_arg[1] = US"/"; /* default separator */ |
ed0512a1 JH |
4173 | sub_arg[2] = NULL; |
4174 | } | |
0539a19d | 4175 | else if (Ustrlen(sub_arg[1]) != 1) |
ed0512a1 | 4176 | { |
94431adb | 4177 | expand_string_message = |
ed0512a1 | 4178 | string_sprintf( |
94431adb | 4179 | "IMAP folder separator must be one character, found \"%s\"", |
ed0512a1 JH |
4180 | sub_arg[1]); |
4181 | goto EXPAND_FAILED; | |
4182 | } | |
4183 | ||
ed0512a1 | 4184 | if (!skipping) |
f267271d JH |
4185 | { |
4186 | if (!(encoded = imap_utf7_encode(sub_arg[0], headers_charset, | |
4187 | sub_arg[1][0], sub_arg[2], &expand_string_message))) | |
4188 | goto EXPAND_FAILED; | |
acec9514 | 4189 | yield = string_cat(yield, encoded); |
f267271d | 4190 | } |
ed0512a1 JH |
4191 | continue; |
4192 | } | |
4193 | #endif | |
4194 | ||
059ec3d9 PH |
4195 | /* Handle database lookups unless locked out. If "skipping" is TRUE, we are |
4196 | expanding an internal string that isn't actually going to be used. All we | |
4197 | need to do is check the syntax, so don't do a lookup at all. Preserve the | |
4198 | values of the numerical expansion variables in case they get changed by a | |
4199 | partial lookup. If not, they retain their external settings. At the end | |
4200 | of this "lookup" section, they get restored to their previous values. */ | |
4201 | ||
4202 | case EITEM_LOOKUP: | |
4203 | { | |
4204 | int stype, partial, affixlen, starflags; | |
4205 | int expand_setup = 0; | |
4206 | int nameptr = 0; | |
55414b25 JH |
4207 | uschar *key, *filename; |
4208 | const uschar *affix; | |
059ec3d9 PH |
4209 | uschar *save_lookup_value = lookup_value; |
4210 | int save_expand_nmax = | |
4211 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
4212 | ||
4213 | if ((expand_forbid & RDO_LOOKUP) != 0) | |
4214 | { | |
4215 | expand_string_message = US"lookup expansions are not permitted"; | |
4216 | goto EXPAND_FAILED; | |
4217 | } | |
4218 | ||
4219 | /* Get the key we are to look up for single-key+file style lookups. | |
4220 | Otherwise set the key NULL pro-tem. */ | |
4221 | ||
4222 | while (isspace(*s)) s++; | |
2e23003a | 4223 | if (*s == '{') /*}*/ |
059ec3d9 | 4224 | { |
b0e85a8f | 4225 | key = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
e47376be JH |
4226 | if (!key) goto EXPAND_FAILED; /*{{*/ |
4227 | if (*s++ != '}') | |
4228 | { | |
4229 | expand_string_message = US"missing '}' after lookup key"; | |
4230 | goto EXPAND_FAILED_CURLY; | |
4231 | } | |
059ec3d9 PH |
4232 | while (isspace(*s)) s++; |
4233 | } | |
4234 | else key = NULL; | |
4235 | ||
4236 | /* Find out the type of database */ | |
4237 | ||
4238 | if (!isalpha(*s)) | |
4239 | { | |
4240 | expand_string_message = US"missing lookup type"; | |
4241 | goto EXPAND_FAILED; | |
4242 | } | |
4243 | ||
4244 | /* The type is a string that may contain special characters of various | |
4245 | kinds. Allow everything except space or { to appear; the actual content | |
2e23003a | 4246 | is checked by search_findtype_partial. */ /*}*/ |
059ec3d9 | 4247 | |
2e23003a | 4248 | while (*s != 0 && *s != '{' && !isspace(*s)) /*}*/ |
059ec3d9 PH |
4249 | { |
4250 | if (nameptr < sizeof(name) - 1) name[nameptr++] = *s; | |
4251 | s++; | |
4252 | } | |
4253 | name[nameptr] = 0; | |
4254 | while (isspace(*s)) s++; | |
4255 | ||
4256 | /* Now check for the individual search type and any partial or default | |
4257 | options. Only those types that are actually in the binary are valid. */ | |
4258 | ||
4259 | stype = search_findtype_partial(name, &partial, &affix, &affixlen, | |
4260 | &starflags); | |
4261 | if (stype < 0) | |
4262 | { | |
4263 | expand_string_message = search_error_message; | |
4264 | goto EXPAND_FAILED; | |
4265 | } | |
4266 | ||
4267 | /* Check that a key was provided for those lookup types that need it, | |
4268 | and was not supplied for those that use the query style. */ | |
4269 | ||
13b685f9 | 4270 | if (!mac_islookup(stype, lookup_querystyle|lookup_absfilequery)) |
059ec3d9 PH |
4271 | { |
4272 | if (key == NULL) | |
4273 | { | |
4274 | expand_string_message = string_sprintf("missing {key} for single-" | |
4275 | "key \"%s\" lookup", name); | |
4276 | goto EXPAND_FAILED; | |
4277 | } | |
4278 | } | |
4279 | else | |
4280 | { | |
4281 | if (key != NULL) | |
4282 | { | |
4283 | expand_string_message = string_sprintf("a single key was given for " | |
4284 | "lookup type \"%s\", which is not a single-key lookup type", name); | |
4285 | goto EXPAND_FAILED; | |
4286 | } | |
4287 | } | |
4288 | ||
4289 | /* Get the next string in brackets and expand it. It is the file name for | |
13b685f9 PH |
4290 | single-key+file lookups, and the whole query otherwise. In the case of |
4291 | queries that also require a file name (e.g. sqlite), the file name comes | |
4292 | first. */ | |
059ec3d9 | 4293 | |
e47376be JH |
4294 | if (*s != '{') |
4295 | { | |
4296 | expand_string_message = US"missing '{' for lookup file-or-query arg"; | |
4297 | goto EXPAND_FAILED_CURLY; | |
4298 | } | |
b0e85a8f | 4299 | filename = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
059ec3d9 | 4300 | if (filename == NULL) goto EXPAND_FAILED; |
e47376be JH |
4301 | if (*s++ != '}') |
4302 | { | |
4303 | expand_string_message = US"missing '}' closing lookup file-or-query arg"; | |
4304 | goto EXPAND_FAILED_CURLY; | |
4305 | } | |
059ec3d9 PH |
4306 | while (isspace(*s)) s++; |
4307 | ||
4308 | /* If this isn't a single-key+file lookup, re-arrange the variables | |
13b685f9 PH |
4309 | to be appropriate for the search_ functions. For query-style lookups, |
4310 | there is just a "key", and no file name. For the special query-style + | |
4311 | file types, the query (i.e. "key") starts with a file name. */ | |
059ec3d9 | 4312 | |
e47376be | 4313 | if (!key) |
059ec3d9 | 4314 | { |
13b685f9 | 4315 | while (isspace(*filename)) filename++; |
059ec3d9 | 4316 | key = filename; |
13b685f9 PH |
4317 | |
4318 | if (mac_islookup(stype, lookup_querystyle)) | |
13b685f9 | 4319 | filename = NULL; |
13b685f9 PH |
4320 | else |
4321 | { | |
4322 | if (*filename != '/') | |
4323 | { | |
4324 | expand_string_message = string_sprintf( | |
4325 | "absolute file name expected for \"%s\" lookup", name); | |
4326 | goto EXPAND_FAILED; | |
4327 | } | |
4328 | while (*key != 0 && !isspace(*key)) key++; | |
4329 | if (*key != 0) *key++ = 0; | |
4330 | } | |
059ec3d9 PH |
4331 | } |
4332 | ||
4333 | /* If skipping, don't do the next bit - just lookup_value == NULL, as if | |
4334 | the entry was not found. Note that there is no search_close() function. | |
4335 | Files are left open in case of re-use. At suitable places in higher logic, | |
4336 | search_tidyup() is called to tidy all open files. This can save opening | |
4337 | the same file several times. However, files may also get closed when | |
4338 | others are opened, if too many are open at once. The rule is that a | |
4339 | handle should not be used after a second search_open(). | |
4340 | ||
4341 | Request that a partial search sets up $1 and maybe $2 by passing | |
4342 | expand_setup containing zero. If its value changes, reset expand_nmax, | |
4343 | since new variables will have been set. Note that at the end of this | |
4344 | "lookup" section, the old numeric variables are restored. */ | |
4345 | ||
4346 | if (skipping) | |
4347 | lookup_value = NULL; | |
4348 | else | |
4349 | { | |
4350 | void *handle = search_open(filename, stype, 0, NULL, NULL); | |
4351 | if (handle == NULL) | |
4352 | { | |
4353 | expand_string_message = search_error_message; | |
4354 | goto EXPAND_FAILED; | |
4355 | } | |
4356 | lookup_value = search_find(handle, filename, key, partial, affix, | |
4357 | affixlen, starflags, &expand_setup); | |
4358 | if (search_find_defer) | |
4359 | { | |
4360 | expand_string_message = | |
b72aab72 PP |
4361 | string_sprintf("lookup of \"%s\" gave DEFER: %s", |
4362 | string_printing2(key, FALSE), search_error_message); | |
059ec3d9 PH |
4363 | goto EXPAND_FAILED; |
4364 | } | |
4365 | if (expand_setup > 0) expand_nmax = expand_setup; | |
4366 | } | |
4367 | ||
4368 | /* The handling of "yes" and "no" result strings is now in a separate | |
4369 | function that is also used by ${if} and ${extract}. */ | |
4370 | ||
4371 | switch(process_yesno( | |
4372 | skipping, /* were previously skipping */ | |
4373 | lookup_value != NULL, /* success/failure indicator */ | |
4374 | save_lookup_value, /* value to reset for string2 */ | |
4375 | &s, /* input pointer */ | |
4376 | &yield, /* output pointer */ | |
b0e85a8f JH |
4377 | US"lookup", /* condition type */ |
4378 | &resetok)) | |
059ec3d9 PH |
4379 | { |
4380 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
4381 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
4382 | } | |
4383 | ||
4384 | /* Restore external setting of expansion variables for carrying on | |
4385 | at this level, and continue. */ | |
4386 | ||
4387 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
4388 | save_expand_nlength); | |
4389 | continue; | |
4390 | } | |
4391 | ||
4392 | /* If Perl support is configured, handle calling embedded perl subroutines, | |
4393 | unless locked out at this time. Syntax is ${perl{sub}} or ${perl{sub}{arg}} | |
4394 | or ${perl{sub}{arg1}{arg2}} or up to a maximum of EXIM_PERL_MAX_ARGS | |
4395 | arguments (defined below). */ | |
4396 | ||
059ec3d9 PH |
4397 | #define EXIM_PERL_MAX_ARGS 8 |
4398 | ||
4399 | case EITEM_PERL: | |
1a46a8c5 | 4400 | #ifndef EXIM_PERL |
2e23003a | 4401 | expand_string_message = US"\"${perl\" encountered, but this facility " /*}*/ |
1a46a8c5 PH |
4402 | "is not included in this binary"; |
4403 | goto EXPAND_FAILED; | |
4404 | ||
4405 | #else /* EXIM_PERL */ | |
059ec3d9 PH |
4406 | { |
4407 | uschar *sub_arg[EXIM_PERL_MAX_ARGS + 2]; | |
acec9514 | 4408 | gstring *new_yield; |
059ec3d9 PH |
4409 | |
4410 | if ((expand_forbid & RDO_PERL) != 0) | |
4411 | { | |
4412 | expand_string_message = US"Perl calls are not permitted"; | |
4413 | goto EXPAND_FAILED; | |
4414 | } | |
4415 | ||
4416 | switch(read_subs(sub_arg, EXIM_PERL_MAX_ARGS + 1, 1, &s, skipping, TRUE, | |
b0e85a8f | 4417 | US"perl", &resetok)) |
059ec3d9 PH |
4418 | { |
4419 | case 1: goto EXPAND_FAILED_CURLY; | |
4420 | case 2: | |
4421 | case 3: goto EXPAND_FAILED; | |
4422 | } | |
4423 | ||
4424 | /* If skipping, we don't actually do anything */ | |
4425 | ||
4426 | if (skipping) continue; | |
4427 | ||
4428 | /* Start the interpreter if necessary */ | |
4429 | ||
4430 | if (!opt_perl_started) | |
4431 | { | |
4432 | uschar *initerror; | |
4433 | if (opt_perl_startup == NULL) | |
4434 | { | |
4435 | expand_string_message = US"A setting of perl_startup is needed when " | |
4436 | "using the Perl interpreter"; | |
4437 | goto EXPAND_FAILED; | |
4438 | } | |
4439 | DEBUG(D_any) debug_printf("Starting Perl interpreter\n"); | |
4440 | initerror = init_perl(opt_perl_startup); | |
4441 | if (initerror != NULL) | |
4442 | { | |
4443 | expand_string_message = | |
4444 | string_sprintf("error in perl_startup code: %s\n", initerror); | |
4445 | goto EXPAND_FAILED; | |
4446 | } | |
4447 | opt_perl_started = TRUE; | |
4448 | } | |
4449 | ||
4450 | /* Call the function */ | |
4451 | ||
4452 | sub_arg[EXIM_PERL_MAX_ARGS + 1] = NULL; | |
acec9514 | 4453 | new_yield = call_perl_cat(yield, &expand_string_message, |
059ec3d9 PH |
4454 | sub_arg[0], sub_arg + 1); |
4455 | ||
4456 | /* NULL yield indicates failure; if the message pointer has been set to | |
4457 | NULL, the yield was undef, indicating a forced failure. Otherwise the | |
4458 | message will indicate some kind of Perl error. */ | |
4459 | ||
4460 | if (new_yield == NULL) | |
4461 | { | |
4462 | if (expand_string_message == NULL) | |
4463 | { | |
4464 | expand_string_message = | |
4465 | string_sprintf("Perl subroutine \"%s\" returned undef to force " | |
4466 | "failure", sub_arg[0]); | |
4467 | expand_string_forcedfail = TRUE; | |
4468 | } | |
4469 | goto EXPAND_FAILED; | |
4470 | } | |
4471 | ||
4472 | /* Yield succeeded. Ensure forcedfail is unset, just in case it got | |
4473 | set during a callback from Perl. */ | |
4474 | ||
4475 | expand_string_forcedfail = FALSE; | |
4476 | yield = new_yield; | |
4477 | continue; | |
4478 | } | |
4479 | #endif /* EXIM_PERL */ | |
4480 | ||
fffda43a TK |
4481 | /* Transform email address to "prvs" scheme to use |
4482 | as BATV-signed return path */ | |
4483 | ||
4484 | case EITEM_PRVS: | |
4485 | { | |
4486 | uschar *sub_arg[3]; | |
4487 | uschar *p,*domain; | |
4488 | ||
b0e85a8f | 4489 | switch(read_subs(sub_arg, 3, 2, &s, skipping, TRUE, US"prvs", &resetok)) |
fffda43a TK |
4490 | { |
4491 | case 1: goto EXPAND_FAILED_CURLY; | |
4492 | case 2: | |
4493 | case 3: goto EXPAND_FAILED; | |
4494 | } | |
4495 | ||
4496 | /* If skipping, we don't actually do anything */ | |
4497 | if (skipping) continue; | |
4498 | ||
4499 | /* sub_arg[0] is the address */ | |
db4dcd57 JH |
4500 | if ( !(domain = Ustrrchr(sub_arg[0],'@')) |
4501 | || domain == sub_arg[0] || Ustrlen(domain) == 1) | |
fffda43a | 4502 | { |
cb9328de PH |
4503 | expand_string_message = US"prvs first argument must be a qualified email address"; |
4504 | goto EXPAND_FAILED; | |
4505 | } | |
4506 | ||
db4dcd57 | 4507 | /* Calculate the hash. The third argument must be a single-digit |
cb9328de PH |
4508 | key number, or unset. */ |
4509 | ||
db4dcd57 JH |
4510 | if ( sub_arg[2] |
4511 | && (!isdigit(sub_arg[2][0]) || sub_arg[2][1] != 0)) | |
cb9328de | 4512 | { |
db4dcd57 | 4513 | expand_string_message = US"prvs third argument must be a single digit"; |
fffda43a TK |
4514 | goto EXPAND_FAILED; |
4515 | } | |
4516 | ||
db4dcd57 JH |
4517 | p = prvs_hmac_sha1(sub_arg[0], sub_arg[1], sub_arg[2], prvs_daystamp(7)); |
4518 | if (!p) | |
fffda43a | 4519 | { |
cb9328de | 4520 | expand_string_message = US"prvs hmac-sha1 conversion failed"; |
fffda43a TK |
4521 | goto EXPAND_FAILED; |
4522 | } | |
4523 | ||
4524 | /* Now separate the domain from the local part */ | |
4525 | *domain++ = '\0'; | |
4526 | ||
acec9514 JH |
4527 | yield = string_catn(yield, US"prvs=", 5); |
4528 | yield = string_catn(yield, sub_arg[2] ? sub_arg[2] : US"0", 1); | |
4529 | yield = string_catn(yield, prvs_daystamp(7), 3); | |
4530 | yield = string_catn(yield, p, 6); | |
4531 | yield = string_catn(yield, US"=", 1); | |
4532 | yield = string_cat (yield, sub_arg[0]); | |
4533 | yield = string_catn(yield, US"@", 1); | |
4534 | yield = string_cat (yield, domain); | |
fffda43a TK |
4535 | |
4536 | continue; | |
4537 | } | |
4538 | ||
4539 | /* Check a prvs-encoded address for validity */ | |
4540 | ||
4541 | case EITEM_PRVSCHECK: | |
4542 | { | |
4543 | uschar *sub_arg[3]; | |
acec9514 | 4544 | gstring * g; |
fffda43a TK |
4545 | const pcre *re; |
4546 | uschar *p; | |
72fdd6ae PH |
4547 | |
4548 | /* TF: Ugliness: We want to expand parameter 1 first, then set | |
fffda43a TK |
4549 | up expansion variables that are used in the expansion of |
4550 | parameter 2. So we clone the string for the first | |
72fdd6ae PH |
4551 | expansion, where we only expand parameter 1. |
4552 | ||
4553 | PH: Actually, that isn't necessary. The read_subs() function is | |
4554 | designed to work this way for the ${if and ${lookup expansions. I've | |
4555 | tidied the code. | |
4556 | */ | |
fffda43a TK |
4557 | |
4558 | /* Reset expansion variables */ | |
4559 | prvscheck_result = NULL; | |
4560 | prvscheck_address = NULL; | |
4561 | prvscheck_keynum = NULL; | |
4562 | ||
b0e85a8f | 4563 | switch(read_subs(sub_arg, 1, 1, &s, skipping, FALSE, US"prvs", &resetok)) |
fffda43a TK |
4564 | { |
4565 | case 1: goto EXPAND_FAILED_CURLY; | |
4566 | case 2: | |
4567 | case 3: goto EXPAND_FAILED; | |
4568 | } | |
4569 | ||
a48ced90 | 4570 | re = regex_must_compile(US"^prvs\\=([0-9])([0-9]{3})([A-F0-9]{6})\\=(.+)\\@(.+)$", |
fffda43a TK |
4571 | TRUE,FALSE); |
4572 | ||
72fdd6ae PH |
4573 | if (regex_match_and_setup(re,sub_arg[0],0,-1)) |
4574 | { | |
a48ced90 TK |
4575 | uschar *local_part = string_copyn(expand_nstring[4],expand_nlength[4]); |
4576 | uschar *key_num = string_copyn(expand_nstring[1],expand_nlength[1]); | |
4577 | uschar *daystamp = string_copyn(expand_nstring[2],expand_nlength[2]); | |
4578 | uschar *hash = string_copyn(expand_nstring[3],expand_nlength[3]); | |
fffda43a TK |
4579 | uschar *domain = string_copyn(expand_nstring[5],expand_nlength[5]); |
4580 | ||
e1d04f48 JH |
4581 | DEBUG(D_expand) debug_printf_indent("prvscheck localpart: %s\n", local_part); |
4582 | DEBUG(D_expand) debug_printf_indent("prvscheck key number: %s\n", key_num); | |
4583 | DEBUG(D_expand) debug_printf_indent("prvscheck daystamp: %s\n", daystamp); | |
4584 | DEBUG(D_expand) debug_printf_indent("prvscheck hash: %s\n", hash); | |
4585 | DEBUG(D_expand) debug_printf_indent("prvscheck domain: %s\n", domain); | |
fffda43a TK |
4586 | |
4587 | /* Set up expansion variables */ | |
acec9514 JH |
4588 | g = string_cat (NULL, local_part); |
4589 | g = string_catn(g, US"@", 1); | |
4590 | g = string_cat (g, domain); | |
4591 | prvscheck_address = string_from_gstring(g); | |
fffda43a TK |
4592 | prvscheck_keynum = string_copy(key_num); |
4593 | ||
72fdd6ae | 4594 | /* Now expand the second argument */ |
b0e85a8f | 4595 | switch(read_subs(sub_arg, 1, 1, &s, skipping, FALSE, US"prvs", &resetok)) |
fffda43a TK |
4596 | { |
4597 | case 1: goto EXPAND_FAILED_CURLY; | |
4598 | case 2: | |
4599 | case 3: goto EXPAND_FAILED; | |
4600 | } | |
4601 | ||
fffda43a | 4602 | /* Now we have the key and can check the address. */ |
72fdd6ae PH |
4603 | |
4604 | p = prvs_hmac_sha1(prvscheck_address, sub_arg[0], prvscheck_keynum, | |
4605 | daystamp); | |
4606 | ||
acec9514 | 4607 | if (!p) |
fffda43a TK |
4608 | { |
4609 | expand_string_message = US"hmac-sha1 conversion failed"; | |
4610 | goto EXPAND_FAILED; | |
4611 | } | |
4612 | ||
e1d04f48 JH |
4613 | DEBUG(D_expand) debug_printf_indent("prvscheck: received hash is %s\n", hash); |
4614 | DEBUG(D_expand) debug_printf_indent("prvscheck: own hash is %s\n", p); | |
72fdd6ae | 4615 | |
fffda43a TK |
4616 | if (Ustrcmp(p,hash) == 0) |
4617 | { | |
4618 | /* Success, valid BATV address. Now check the expiry date. */ | |
4619 | uschar *now = prvs_daystamp(0); | |
4620 | unsigned int inow = 0,iexpire = 1; | |
4621 | ||
ff790e47 PH |
4622 | (void)sscanf(CS now,"%u",&inow); |
4623 | (void)sscanf(CS daystamp,"%u",&iexpire); | |
fffda43a TK |
4624 | |
4625 | /* When "iexpire" is < 7, a "flip" has occured. | |
4626 | Adjust "inow" accordingly. */ | |
4627 | if ( (iexpire < 7) && (inow >= 993) ) inow = 0; | |
4628 | ||
686c36b7 | 4629 | if (iexpire >= inow) |
fffda43a TK |
4630 | { |
4631 | prvscheck_result = US"1"; | |
e1d04f48 | 4632 | DEBUG(D_expand) debug_printf_indent("prvscheck: success, $pvrs_result set to 1\n"); |
fffda43a | 4633 | } |
db4dcd57 | 4634 | else |
fffda43a TK |
4635 | { |
4636 | prvscheck_result = NULL; | |
e1d04f48 | 4637 | DEBUG(D_expand) debug_printf_indent("prvscheck: signature expired, $pvrs_result unset\n"); |
fffda43a TK |
4638 | } |
4639 | } | |
4640 | else | |
4641 | { | |
4642 | prvscheck_result = NULL; | |
e1d04f48 | 4643 | DEBUG(D_expand) debug_printf_indent("prvscheck: hash failure, $pvrs_result unset\n"); |
fffda43a | 4644 | } |
72fdd6ae PH |
4645 | |
4646 | /* Now expand the final argument. We leave this till now so that | |
4647 | it can include $prvscheck_result. */ | |
4648 | ||
b0e85a8f | 4649 | switch(read_subs(sub_arg, 1, 0, &s, skipping, TRUE, US"prvs", &resetok)) |
72fdd6ae PH |
4650 | { |
4651 | case 1: goto EXPAND_FAILED_CURLY; | |
4652 | case 2: | |
4653 | case 3: goto EXPAND_FAILED; | |
4654 | } | |
4655 | ||
acec9514 | 4656 | yield = string_cat(yield, |
c2f669a4 | 4657 | !sub_arg[0] || !*sub_arg[0] ? prvscheck_address : sub_arg[0]); |
72fdd6ae PH |
4658 | |
4659 | /* Reset the "internal" variables afterwards, because they are in | |
4660 | dynamic store that will be reclaimed if the expansion succeeded. */ | |
4661 | ||
4662 | prvscheck_address = NULL; | |
4663 | prvscheck_keynum = NULL; | |
4664 | } | |
fffda43a | 4665 | else |
fffda43a | 4666 | /* Does not look like a prvs encoded address, return the empty string. |
72fdd6ae PH |
4667 | We need to make sure all subs are expanded first, so as to skip over |
4668 | the entire item. */ | |
4669 | ||
b0e85a8f | 4670 | switch(read_subs(sub_arg, 2, 1, &s, skipping, TRUE, US"prvs", &resetok)) |
fffda43a TK |
4671 | { |
4672 | case 1: goto EXPAND_FAILED_CURLY; | |
4673 | case 2: | |
4674 | case 3: goto EXPAND_FAILED; | |
4675 | } | |
fffda43a TK |
4676 | |
4677 | continue; | |
4678 | } | |
4679 | ||
059ec3d9 PH |
4680 | /* Handle "readfile" to insert an entire file */ |
4681 | ||
4682 | case EITEM_READFILE: | |
4683 | { | |
4684 | FILE *f; | |
4685 | uschar *sub_arg[2]; | |
4686 | ||
4687 | if ((expand_forbid & RDO_READFILE) != 0) | |
4688 | { | |
4689 | expand_string_message = US"file insertions are not permitted"; | |
4690 | goto EXPAND_FAILED; | |
4691 | } | |
4692 | ||
b0e85a8f | 4693 | switch(read_subs(sub_arg, 2, 1, &s, skipping, TRUE, US"readfile", &resetok)) |
059ec3d9 PH |
4694 | { |
4695 | case 1: goto EXPAND_FAILED_CURLY; | |
4696 | case 2: | |
4697 | case 3: goto EXPAND_FAILED; | |
4698 | } | |
4699 | ||
4700 | /* If skipping, we don't actually do anything */ | |
4701 | ||
4702 | if (skipping) continue; | |
4703 | ||
4704 | /* Open the file and read it */ | |
4705 | ||
4a5cbaff | 4706 | if (!(f = Ufopen(sub_arg[0], "rb"))) |
059ec3d9 PH |
4707 | { |
4708 | expand_string_message = string_open_failed(errno, "%s", sub_arg[0]); | |
4709 | goto EXPAND_FAILED; | |
4710 | } | |
4711 | ||
acec9514 | 4712 | yield = cat_file(f, yield, sub_arg[1]); |
f1e894f3 | 4713 | (void)fclose(f); |
059ec3d9 PH |
4714 | continue; |
4715 | } | |
4716 | ||
4a5cbaff JH |
4717 | /* Handle "readsocket" to insert data from a socket, either |
4718 | Inet or Unix domain */ | |
059ec3d9 PH |
4719 | |
4720 | case EITEM_READSOCK: | |
4721 | { | |
4722 | int fd; | |
4723 | int timeout = 5; | |
acec9514 | 4724 | int save_ptr = yield->ptr; |
059ec3d9 | 4725 | FILE *f; |
059ec3d9 PH |
4726 | uschar *arg; |
4727 | uschar *sub_arg[4]; | |
8de9db65 | 4728 | BOOL do_shutdown = TRUE; |
4a5cbaff | 4729 | blob reqstr; |
059ec3d9 | 4730 | |
8de9db65 | 4731 | if (expand_forbid & RDO_READSOCK) |
059ec3d9 PH |
4732 | { |
4733 | expand_string_message = US"socket insertions are not permitted"; | |
4734 | goto EXPAND_FAILED; | |
4735 | } | |
4736 | ||
4737 | /* Read up to 4 arguments, but don't do the end of item check afterwards, | |
4738 | because there may be a string for expansion on failure. */ | |
4739 | ||
b0e85a8f | 4740 | switch(read_subs(sub_arg, 4, 2, &s, skipping, FALSE, US"readsocket", &resetok)) |
059ec3d9 PH |
4741 | { |
4742 | case 1: goto EXPAND_FAILED_CURLY; | |
4743 | case 2: /* Won't occur: no end check */ | |
4744 | case 3: goto EXPAND_FAILED; | |
4745 | } | |
4746 | ||
4a5cbaff JH |
4747 | /* Grab the request string, if any */ |
4748 | ||
4749 | reqstr.data = sub_arg[1]; | |
4750 | reqstr.len = Ustrlen(sub_arg[1]); | |
4751 | ||
8de9db65 JH |
4752 | /* Sort out timeout, if given. The second arg is a list with the first element |
4753 | being a time value. Any more are options of form "name=value". Currently the | |
4754 | only option recognised is "shutdown". */ | |
059ec3d9 | 4755 | |
8de9db65 | 4756 | if (sub_arg[2]) |
059ec3d9 | 4757 | { |
8de9db65 JH |
4758 | const uschar * list = sub_arg[2]; |
4759 | uschar * item; | |
4760 | int sep = 0; | |
4761 | ||
4762 | item = string_nextinlist(&list, &sep, NULL, 0); | |
4763 | if ((timeout = readconf_readtime(item, 0, FALSE)) < 0) | |
059ec3d9 | 4764 | { |
8de9db65 | 4765 | expand_string_message = string_sprintf("bad time value %s", item); |
059ec3d9 PH |
4766 | goto EXPAND_FAILED; |
4767 | } | |
8de9db65 JH |
4768 | |
4769 | while ((item = string_nextinlist(&list, &sep, NULL, 0))) | |
4770 | if (Ustrncmp(item, US"shutdown=", 9) == 0) | |
4771 | if (Ustrcmp(item + 9, US"no") == 0) | |
4772 | do_shutdown = FALSE; | |
059ec3d9 PH |
4773 | } |
4774 | else sub_arg[3] = NULL; /* No eol if no timeout */ | |
4775 | ||
1cce3af8 PH |
4776 | /* If skipping, we don't actually do anything. Otherwise, arrange to |
4777 | connect to either an IP or a Unix socket. */ | |
059ec3d9 PH |
4778 | |
4779 | if (!skipping) | |
4780 | { | |
1cce3af8 | 4781 | /* Handle an IP (internet) domain */ |
059ec3d9 | 4782 | |
91ecef39 | 4783 | if (Ustrncmp(sub_arg[0], "inet:", 5) == 0) |
059ec3d9 | 4784 | { |
b1f8e4f8 | 4785 | int port; |
4a5cbaff JH |
4786 | uschar * server_name = sub_arg[0] + 5; |
4787 | uschar * port_name = Ustrrchr(server_name, ':'); | |
1cce3af8 PH |
4788 | |
4789 | /* Sort out the port */ | |
4790 | ||
4a5cbaff | 4791 | if (!port_name) |
1cce3af8 PH |
4792 | { |
4793 | expand_string_message = | |
4794 | string_sprintf("missing port for readsocket %s", sub_arg[0]); | |
4795 | goto EXPAND_FAILED; | |
4796 | } | |
4797 | *port_name++ = 0; /* Terminate server name */ | |
4798 | ||
4799 | if (isdigit(*port_name)) | |
4800 | { | |
4801 | uschar *end; | |
4802 | port = Ustrtol(port_name, &end, 0); | |
4803 | if (end != port_name + Ustrlen(port_name)) | |
4804 | { | |
4805 | expand_string_message = | |
4806 | string_sprintf("invalid port number %s", port_name); | |
4807 | goto EXPAND_FAILED; | |
4808 | } | |
4809 | } | |
4810 | else | |
4811 | { | |
4812 | struct servent *service_info = getservbyname(CS port_name, "tcp"); | |
4a5cbaff | 4813 | if (!service_info) |
1cce3af8 PH |
4814 | { |
4815 | expand_string_message = string_sprintf("unknown port \"%s\"", | |
4816 | port_name); | |
4817 | goto EXPAND_FAILED; | |
4818 | } | |
4819 | port = ntohs(service_info->s_port); | |
4820 | } | |
4821 | ||
90341c71 | 4822 | fd = ip_connectedsocket(SOCK_STREAM, server_name, port, port, |
4a5cbaff | 4823 | timeout, NULL, &expand_string_message, &reqstr); |
90341c71 JH |
4824 | callout_address = NULL; |
4825 | if (fd < 0) | |
1cce3af8 | 4826 | goto SOCK_FAIL; |
4a5cbaff | 4827 | reqstr.len = 0; |
059ec3d9 PH |
4828 | } |
4829 | ||
1cce3af8 PH |
4830 | /* Handle a Unix domain socket */ |
4831 | ||
4832 | else | |
059ec3d9 | 4833 | { |
4a5cbaff | 4834 | struct sockaddr_un sockun; /* don't call this "sun" ! */ |
a401ddaa | 4835 | int rc; |
4a5cbaff | 4836 | |
1cce3af8 PH |
4837 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) == -1) |
4838 | { | |
4839 | expand_string_message = string_sprintf("failed to create socket: %s", | |
4840 | strerror(errno)); | |
4841 | goto SOCK_FAIL; | |
4842 | } | |
4843 | ||
4844 | sockun.sun_family = AF_UNIX; | |
4845 | sprintf(sockun.sun_path, "%.*s", (int)(sizeof(sockun.sun_path)-1), | |
4846 | sub_arg[0]); | |
a401ddaa PH |
4847 | |
4848 | sigalrm_seen = FALSE; | |
4849 | alarm(timeout); | |
4850 | rc = connect(fd, (struct sockaddr *)(&sockun), sizeof(sockun)); | |
4851 | alarm(0); | |
734e1499 | 4852 | if (sigalrm_seen) |
1cce3af8 | 4853 | { |
734e1499 | 4854 | expand_string_message = US "socket connect timed out"; |
1cce3af8 PH |
4855 | goto SOCK_FAIL; |
4856 | } | |
734e1499 | 4857 | if (rc < 0) |
a401ddaa | 4858 | { |
734e1499 PH |
4859 | expand_string_message = string_sprintf("failed to connect to socket " |
4860 | "%s: %s", sub_arg[0], strerror(errno)); | |
a401ddaa PH |
4861 | goto SOCK_FAIL; |
4862 | } | |
059ec3d9 | 4863 | } |
1cce3af8 | 4864 | |
e1d04f48 | 4865 | DEBUG(D_expand) debug_printf_indent("connected to socket %s\n", sub_arg[0]); |
059ec3d9 | 4866 | |
567e584c JH |
4867 | /* Allow sequencing of test actions */ |
4868 | if (running_in_test_harness) millisleep(100); | |
4869 | ||
4a5cbaff | 4870 | /* Write the request string, if not empty or already done */ |
059ec3d9 | 4871 | |
4a5cbaff | 4872 | if (reqstr.len) |
059ec3d9 | 4873 | { |
e1d04f48 | 4874 | DEBUG(D_expand) debug_printf_indent("writing \"%s\" to socket\n", |
4a5cbaff JH |
4875 | reqstr.data); |
4876 | if (write(fd, reqstr.data, reqstr.len) != reqstr.len) | |
059ec3d9 PH |
4877 | { |
4878 | expand_string_message = string_sprintf("request write to socket " | |
4879 | "failed: %s", strerror(errno)); | |
4880 | goto SOCK_FAIL; | |
4881 | } | |
4882 | } | |
4883 | ||
c1114884 PH |
4884 | /* Shut down the sending side of the socket. This helps some servers to |
4885 | recognise that it is their turn to do some work. Just in case some | |
4886 | system doesn't have this function, make it conditional. */ | |
4887 | ||
8de9db65 JH |
4888 | #ifdef SHUT_WR |
4889 | if (do_shutdown) shutdown(fd, SHUT_WR); | |
4890 | #endif | |
c1114884 | 4891 | |
567e584c JH |
4892 | if (running_in_test_harness) millisleep(100); |
4893 | ||
059ec3d9 PH |
4894 | /* Now we need to read from the socket, under a timeout. The function |
4895 | that reads a file can be used. */ | |
4896 | ||
4897 | f = fdopen(fd, "rb"); | |
4898 | sigalrm_seen = FALSE; | |
4899 | alarm(timeout); | |
acec9514 | 4900 | yield = cat_file(f, yield, sub_arg[3]); |
059ec3d9 | 4901 | alarm(0); |
f1e894f3 | 4902 | (void)fclose(f); |
059ec3d9 PH |
4903 | |
4904 | /* After a timeout, we restore the pointer in the result, that is, | |
4905 | make sure we add nothing from the socket. */ | |
4906 | ||
4907 | if (sigalrm_seen) | |
4908 | { | |
acec9514 | 4909 | yield->ptr = save_ptr; |
1cce3af8 | 4910 | expand_string_message = US "socket read timed out"; |
059ec3d9 PH |
4911 | goto SOCK_FAIL; |
4912 | } | |
4913 | } | |
4914 | ||
4915 | /* The whole thing has worked (or we were skipping). If there is a | |
4916 | failure string following, we need to skip it. */ | |
4917 | ||
4918 | if (*s == '{') | |
4919 | { | |
b0e85a8f | 4920 | if (expand_string_internal(s+1, TRUE, &s, TRUE, TRUE, &resetok) == NULL) |
059ec3d9 | 4921 | goto EXPAND_FAILED; |
e47376be JH |
4922 | if (*s++ != '}') |
4923 | { | |
4924 | expand_string_message = US"missing '}' closing failstring for readsocket"; | |
4925 | goto EXPAND_FAILED_CURLY; | |
4926 | } | |
059ec3d9 PH |
4927 | while (isspace(*s)) s++; |
4928 | } | |
e47376be | 4929 | |
8de9db65 | 4930 | READSOCK_DONE: |
e47376be JH |
4931 | if (*s++ != '}') |
4932 | { | |
4933 | expand_string_message = US"missing '}' closing readsocket"; | |
4934 | goto EXPAND_FAILED_CURLY; | |
4935 | } | |
059ec3d9 PH |
4936 | continue; |
4937 | ||
4938 | /* Come here on failure to create socket, connect socket, write to the | |
4939 | socket, or timeout on reading. If another substring follows, expand and | |
4940 | use it. Otherwise, those conditions give expand errors. */ | |
4941 | ||
8de9db65 | 4942 | SOCK_FAIL: |
059ec3d9 PH |
4943 | if (*s != '{') goto EXPAND_FAILED; |
4944 | DEBUG(D_any) debug_printf("%s\n", expand_string_message); | |
c2f669a4 JH |
4945 | if (!(arg = expand_string_internal(s+1, TRUE, &s, FALSE, TRUE, &resetok))) |
4946 | goto EXPAND_FAILED; | |
acec9514 | 4947 | yield = string_cat(yield, arg); |
e47376be JH |
4948 | if (*s++ != '}') |
4949 | { | |
4950 | expand_string_message = US"missing '}' closing failstring for readsocket"; | |
4951 | goto EXPAND_FAILED_CURLY; | |
4952 | } | |
059ec3d9 | 4953 | while (isspace(*s)) s++; |
8de9db65 | 4954 | goto READSOCK_DONE; |
059ec3d9 PH |
4955 | } |
4956 | ||
4957 | /* Handle "run" to execute a program. */ | |
4958 | ||
4959 | case EITEM_RUN: | |
4960 | { | |
4961 | FILE *f; | |
059ec3d9 | 4962 | uschar *arg; |
55414b25 | 4963 | const uschar **argv; |
059ec3d9 PH |
4964 | pid_t pid; |
4965 | int fd_in, fd_out; | |
059ec3d9 PH |
4966 | |
4967 | if ((expand_forbid & RDO_RUN) != 0) | |
4968 | { | |
4969 | expand_string_message = US"running a command is not permitted"; | |
4970 | goto EXPAND_FAILED; | |
4971 | } | |
4972 | ||
4973 | while (isspace(*s)) s++; | |
e47376be JH |
4974 | if (*s != '{') |
4975 | { | |
4976 | expand_string_message = US"missing '{' for command arg of run"; | |
4977 | goto EXPAND_FAILED_CURLY; | |
4978 | } | |
b0e85a8f | 4979 | arg = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
059ec3d9 PH |
4980 | if (arg == NULL) goto EXPAND_FAILED; |
4981 | while (isspace(*s)) s++; | |
e47376be JH |
4982 | if (*s++ != '}') |
4983 | { | |
4984 | expand_string_message = US"missing '}' closing command arg of run"; | |
4985 | goto EXPAND_FAILED_CURLY; | |
4986 | } | |
059ec3d9 PH |
4987 | |
4988 | if (skipping) /* Just pretend it worked when we're skipping */ | |
20fcb1e7 | 4989 | { |
059ec3d9 | 4990 | runrc = 0; |
20fcb1e7 JH |
4991 | lookup_value = NULL; |
4992 | } | |
059ec3d9 PH |
4993 | else |
4994 | { | |
4995 | if (!transport_set_up_command(&argv, /* anchor for arg list */ | |
4996 | arg, /* raw command */ | |
4997 | FALSE, /* don't expand the arguments */ | |
4998 | 0, /* not relevant when... */ | |
4999 | NULL, /* no transporting address */ | |
5000 | US"${run} expansion", /* for error messages */ | |
5001 | &expand_string_message)) /* where to put error message */ | |
059ec3d9 | 5002 | goto EXPAND_FAILED; |
059ec3d9 PH |
5003 | |
5004 | /* Create the child process, making it a group leader. */ | |
5005 | ||
fa01e4f8 | 5006 | if ((pid = child_open(USS argv, NULL, 0077, &fd_in, &fd_out, TRUE)) < 0) |
059ec3d9 PH |
5007 | { |
5008 | expand_string_message = | |
5009 | string_sprintf("couldn't create child process: %s", strerror(errno)); | |
5010 | goto EXPAND_FAILED; | |
5011 | } | |
5012 | ||
5013 | /* Nothing is written to the standard input. */ | |
5014 | ||
f1e894f3 | 5015 | (void)close(fd_in); |
059ec3d9 | 5016 | |
ac53fcda PP |
5017 | /* Read the pipe to get the command's output into $value (which is kept |
5018 | in lookup_value). Read during execution, so that if the output exceeds | |
1a08dbc4 JH |
5019 | the OS pipe buffer limit, we don't block forever. Remember to not release |
5020 | memory just allocated for $value. */ | |
ac53fcda | 5021 | |
1a08dbc4 | 5022 | resetok = FALSE; |
ac53fcda PP |
5023 | f = fdopen(fd_out, "rb"); |
5024 | sigalrm_seen = FALSE; | |
5025 | alarm(60); | |
acec9514 | 5026 | lookup_value = string_from_gstring(cat_file(f, NULL, NULL)); |
ac53fcda PP |
5027 | alarm(0); |
5028 | (void)fclose(f); | |
5029 | ||
059ec3d9 PH |
5030 | /* Wait for the process to finish, applying the timeout, and inspect its |
5031 | return code for serious disasters. Simple non-zero returns are passed on. | |
5032 | */ | |
5033 | ||
8487aee9 | 5034 | if (sigalrm_seen || (runrc = child_close(pid, 30)) < 0) |
059ec3d9 | 5035 | { |
8487aee9 | 5036 | if (sigalrm_seen || runrc == -256) |
059ec3d9 PH |
5037 | { |
5038 | expand_string_message = string_sprintf("command timed out"); | |
5039 | killpg(pid, SIGKILL); /* Kill the whole process group */ | |
5040 | } | |
5041 | ||
5042 | else if (runrc == -257) | |
5043 | expand_string_message = string_sprintf("wait() failed: %s", | |
5044 | strerror(errno)); | |
5045 | ||
5046 | else | |
5047 | expand_string_message = string_sprintf("command killed by signal %d", | |
5048 | -runrc); | |
5049 | ||
5050 | goto EXPAND_FAILED; | |
5051 | } | |
059ec3d9 PH |
5052 | } |
5053 | ||
d20976dc | 5054 | /* Process the yes/no strings; $value may be useful in both cases */ |
059ec3d9 PH |
5055 | |
5056 | switch(process_yesno( | |
5057 | skipping, /* were previously skipping */ | |
5058 | runrc == 0, /* success/failure indicator */ | |
d20976dc | 5059 | lookup_value, /* value to reset for string2 */ |
059ec3d9 PH |
5060 | &s, /* input pointer */ |
5061 | &yield, /* output pointer */ | |
b0e85a8f JH |
5062 | US"run", /* condition type */ |
5063 | &resetok)) | |
059ec3d9 PH |
5064 | { |
5065 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5066 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5067 | } | |
5068 | ||
5069 | continue; | |
5070 | } | |
5071 | ||
5072 | /* Handle character translation for "tr" */ | |
5073 | ||
5074 | case EITEM_TR: | |
5075 | { | |
acec9514 | 5076 | int oldptr = yield->ptr; |
059ec3d9 PH |
5077 | int o2m; |
5078 | uschar *sub[3]; | |
5079 | ||
b0e85a8f | 5080 | switch(read_subs(sub, 3, 3, &s, skipping, TRUE, US"tr", &resetok)) |
059ec3d9 PH |
5081 | { |
5082 | case 1: goto EXPAND_FAILED_CURLY; | |
5083 | case 2: | |
5084 | case 3: goto EXPAND_FAILED; | |
5085 | } | |
5086 | ||
acec9514 | 5087 | yield = string_cat(yield, sub[0]); |
059ec3d9 PH |
5088 | o2m = Ustrlen(sub[2]) - 1; |
5089 | ||
acec9514 | 5090 | if (o2m >= 0) for (; oldptr < yield->ptr; oldptr++) |
059ec3d9 | 5091 | { |
acec9514 | 5092 | uschar *m = Ustrrchr(sub[1], yield->s[oldptr]); |
059ec3d9 PH |
5093 | if (m != NULL) |
5094 | { | |
5095 | int o = m - sub[1]; | |
acec9514 | 5096 | yield->s[oldptr] = sub[2][(o < o2m)? o : o2m]; |
059ec3d9 PH |
5097 | } |
5098 | } | |
5099 | ||
5100 | continue; | |
5101 | } | |
5102 | ||
5103 | /* Handle "hash", "length", "nhash", and "substr" when they are given with | |
5104 | expanded arguments. */ | |
5105 | ||
5106 | case EITEM_HASH: | |
5107 | case EITEM_LENGTH: | |
5108 | case EITEM_NHASH: | |
5109 | case EITEM_SUBSTR: | |
5110 | { | |
5111 | int i; | |
5112 | int len; | |
5113 | uschar *ret; | |
5114 | int val[2] = { 0, -1 }; | |
5115 | uschar *sub[3]; | |
5116 | ||
5117 | /* "length" takes only 2 arguments whereas the others take 2 or 3. | |
2e23003a | 5118 | Ensure that sub[2] is set in the ${length } case. */ |
059ec3d9 PH |
5119 | |
5120 | sub[2] = NULL; | |
5121 | switch(read_subs(sub, (item_type == EITEM_LENGTH)? 2:3, 2, &s, skipping, | |
b0e85a8f | 5122 | TRUE, name, &resetok)) |
059ec3d9 PH |
5123 | { |
5124 | case 1: goto EXPAND_FAILED_CURLY; | |
5125 | case 2: | |
5126 | case 3: goto EXPAND_FAILED; | |
5127 | } | |
5128 | ||
5129 | /* Juggle the arguments if there are only two of them: always move the | |
5130 | string to the last position and make ${length{n}{str}} equivalent to | |
5131 | ${substr{0}{n}{str}}. See the defaults for val[] above. */ | |
5132 | ||
5133 | if (sub[2] == NULL) | |
5134 | { | |
5135 | sub[2] = sub[1]; | |
5136 | sub[1] = NULL; | |
5137 | if (item_type == EITEM_LENGTH) | |
5138 | { | |
5139 | sub[1] = sub[0]; | |
5140 | sub[0] = NULL; | |
5141 | } | |
5142 | } | |
5143 | ||
5144 | for (i = 0; i < 2; i++) | |
5145 | { | |
5146 | if (sub[i] == NULL) continue; | |
5147 | val[i] = (int)Ustrtol(sub[i], &ret, 10); | |
5148 | if (*ret != 0 || (i != 0 && val[i] < 0)) | |
5149 | { | |
5150 | expand_string_message = string_sprintf("\"%s\" is not a%s number " | |
5151 | "(in \"%s\" expansion)", sub[i], (i != 0)? " positive" : "", name); | |
5152 | goto EXPAND_FAILED; | |
5153 | } | |
5154 | } | |
5155 | ||
5156 | ret = | |
5157 | (item_type == EITEM_HASH)? | |
5158 | compute_hash(sub[2], val[0], val[1], &len) : | |
5159 | (item_type == EITEM_NHASH)? | |
5160 | compute_nhash(sub[2], val[0], val[1], &len) : | |
5161 | extract_substr(sub[2], val[0], val[1], &len); | |
5162 | ||
5163 | if (ret == NULL) goto EXPAND_FAILED; | |
acec9514 | 5164 | yield = string_catn(yield, ret, len); |
059ec3d9 PH |
5165 | continue; |
5166 | } | |
5167 | ||
5168 | /* Handle HMAC computation: ${hmac{<algorithm>}{<secret>}{<text>}} | |
5169 | This code originally contributed by Steve Haslam. It currently supports | |
5170 | the use of MD5 and SHA-1 hashes. | |
5171 | ||
5172 | We need some workspace that is large enough to handle all the supported | |
5173 | hash types. Use macros to set the sizes rather than be too elaborate. */ | |
5174 | ||
5175 | #define MAX_HASHLEN 20 | |
5176 | #define MAX_HASHBLOCKLEN 64 | |
5177 | ||
5178 | case EITEM_HMAC: | |
5179 | { | |
5180 | uschar *sub[3]; | |
5181 | md5 md5_base; | |
5fb822fc | 5182 | hctx sha1_ctx; |
059ec3d9 PH |
5183 | void *use_base; |
5184 | int type, i; | |
5185 | int hashlen; /* Number of octets for the hash algorithm's output */ | |
5186 | int hashblocklen; /* Number of octets the hash algorithm processes */ | |
5187 | uschar *keyptr, *p; | |
5188 | unsigned int keylen; | |
5189 | ||
5190 | uschar keyhash[MAX_HASHLEN]; | |
5191 | uschar innerhash[MAX_HASHLEN]; | |
5192 | uschar finalhash[MAX_HASHLEN]; | |
5193 | uschar finalhash_hex[2*MAX_HASHLEN]; | |
5194 | uschar innerkey[MAX_HASHBLOCKLEN]; | |
5195 | uschar outerkey[MAX_HASHBLOCKLEN]; | |
5196 | ||
b0e85a8f | 5197 | switch (read_subs(sub, 3, 3, &s, skipping, TRUE, name, &resetok)) |
059ec3d9 PH |
5198 | { |
5199 | case 1: goto EXPAND_FAILED_CURLY; | |
5200 | case 2: | |
5201 | case 3: goto EXPAND_FAILED; | |
5202 | } | |
5203 | ||
e12b4599 JH |
5204 | if (!skipping) |
5205 | { | |
5206 | if (Ustrcmp(sub[0], "md5") == 0) | |
5207 | { | |
5208 | type = HMAC_MD5; | |
5209 | use_base = &md5_base; | |
5210 | hashlen = 16; | |
5211 | hashblocklen = 64; | |
5212 | } | |
5213 | else if (Ustrcmp(sub[0], "sha1") == 0) | |
5214 | { | |
5215 | type = HMAC_SHA1; | |
5216 | use_base = &sha1_ctx; | |
5217 | hashlen = 20; | |
5218 | hashblocklen = 64; | |
5219 | } | |
5220 | else | |
5221 | { | |
5222 | expand_string_message = | |
5223 | string_sprintf("hmac algorithm \"%s\" is not recognised", sub[0]); | |
5224 | goto EXPAND_FAILED; | |
5225 | } | |
059ec3d9 | 5226 | |
e12b4599 JH |
5227 | keyptr = sub[1]; |
5228 | keylen = Ustrlen(keyptr); | |
059ec3d9 | 5229 | |
e12b4599 JH |
5230 | /* If the key is longer than the hash block length, then hash the key |
5231 | first */ | |
059ec3d9 | 5232 | |
e12b4599 JH |
5233 | if (keylen > hashblocklen) |
5234 | { | |
5235 | chash_start(type, use_base); | |
5236 | chash_end(type, use_base, keyptr, keylen, keyhash); | |
5237 | keyptr = keyhash; | |
5238 | keylen = hashlen; | |
5239 | } | |
059ec3d9 | 5240 | |
e12b4599 | 5241 | /* Now make the inner and outer key values */ |
059ec3d9 | 5242 | |
e12b4599 JH |
5243 | memset(innerkey, 0x36, hashblocklen); |
5244 | memset(outerkey, 0x5c, hashblocklen); | |
059ec3d9 | 5245 | |
e12b4599 JH |
5246 | for (i = 0; i < keylen; i++) |
5247 | { | |
5248 | innerkey[i] ^= keyptr[i]; | |
5249 | outerkey[i] ^= keyptr[i]; | |
5250 | } | |
059ec3d9 | 5251 | |
e12b4599 | 5252 | /* Now do the hashes */ |
059ec3d9 | 5253 | |
e12b4599 JH |
5254 | chash_start(type, use_base); |
5255 | chash_mid(type, use_base, innerkey); | |
5256 | chash_end(type, use_base, sub[2], Ustrlen(sub[2]), innerhash); | |
059ec3d9 | 5257 | |
e12b4599 JH |
5258 | chash_start(type, use_base); |
5259 | chash_mid(type, use_base, outerkey); | |
5260 | chash_end(type, use_base, innerhash, hashlen, finalhash); | |
059ec3d9 | 5261 | |
e12b4599 | 5262 | /* Encode the final hash as a hex string */ |
059ec3d9 | 5263 | |
e12b4599 JH |
5264 | p = finalhash_hex; |
5265 | for (i = 0; i < hashlen; i++) | |
5266 | { | |
5267 | *p++ = hex_digits[(finalhash[i] & 0xf0) >> 4]; | |
5268 | *p++ = hex_digits[finalhash[i] & 0x0f]; | |
5269 | } | |
059ec3d9 | 5270 | |
e12b4599 JH |
5271 | DEBUG(D_any) debug_printf("HMAC[%s](%.*s,%s)=%.*s\n", |
5272 | sub[0], (int)keylen, keyptr, sub[2], hashlen*2, finalhash_hex); | |
059ec3d9 | 5273 | |
acec9514 | 5274 | yield = string_catn(yield, finalhash_hex, hashlen*2); |
e12b4599 JH |
5275 | } |
5276 | continue; | |
059ec3d9 PH |
5277 | } |
5278 | ||
059ec3d9 PH |
5279 | /* Handle global substitution for "sg" - like Perl's s/xxx/yyy/g operator. |
5280 | We have to save the numerical variables and restore them afterwards. */ | |
5281 | ||
5282 | case EITEM_SG: | |
5283 | { | |
5284 | const pcre *re; | |
5285 | int moffset, moffsetextra, slen; | |
5286 | int roffset; | |
5287 | int emptyopt; | |
5288 | const uschar *rerror; | |
5289 | uschar *subject; | |
5290 | uschar *sub[3]; | |
5291 | int save_expand_nmax = | |
5292 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5293 | ||
b0e85a8f | 5294 | switch(read_subs(sub, 3, 3, &s, skipping, TRUE, US"sg", &resetok)) |
059ec3d9 PH |
5295 | { |
5296 | case 1: goto EXPAND_FAILED_CURLY; | |
5297 | case 2: | |
5298 | case 3: goto EXPAND_FAILED; | |
5299 | } | |
5300 | ||
5301 | /* Compile the regular expression */ | |
5302 | ||
5303 | re = pcre_compile(CS sub[1], PCRE_COPT, (const char **)&rerror, &roffset, | |
5304 | NULL); | |
5305 | ||
5306 | if (re == NULL) | |
5307 | { | |
5308 | expand_string_message = string_sprintf("regular expression error in " | |
5309 | "\"%s\": %s at offset %d", sub[1], rerror, roffset); | |
5310 | goto EXPAND_FAILED; | |
5311 | } | |
5312 | ||
5313 | /* Now run a loop to do the substitutions as often as necessary. It ends | |
5314 | when there are no more matches. Take care over matches of the null string; | |
5315 | do the same thing as Perl does. */ | |
5316 | ||
5317 | subject = sub[0]; | |
5318 | slen = Ustrlen(sub[0]); | |
5319 | moffset = moffsetextra = 0; | |
5320 | emptyopt = 0; | |
5321 | ||
5322 | for (;;) | |
5323 | { | |
5324 | int ovector[3*(EXPAND_MAXN+1)]; | |
5325 | int n = pcre_exec(re, NULL, CS subject, slen, moffset + moffsetextra, | |
0539a19d | 5326 | PCRE_EOPT | emptyopt, ovector, nelem(ovector)); |
059ec3d9 PH |
5327 | int nn; |
5328 | uschar *insert; | |
5329 | ||
5330 | /* No match - if we previously set PCRE_NOTEMPTY after a null match, this | |
5331 | is not necessarily the end. We want to repeat the match from one | |
5332 | character further along, but leaving the basic offset the same (for | |
5333 | copying below). We can't be at the end of the string - that was checked | |
5334 | before setting PCRE_NOTEMPTY. If PCRE_NOTEMPTY is not set, we are | |
5335 | finished; copy the remaining string and end the loop. */ | |
5336 | ||
5337 | if (n < 0) | |
5338 | { | |
5339 | if (emptyopt != 0) | |
5340 | { | |
5341 | moffsetextra = 1; | |
5342 | emptyopt = 0; | |
5343 | continue; | |
5344 | } | |
acec9514 | 5345 | yield = string_catn(yield, subject+moffset, slen-moffset); |
059ec3d9 PH |
5346 | break; |
5347 | } | |
5348 | ||
5349 | /* Match - set up for expanding the replacement. */ | |
5350 | ||
5351 | if (n == 0) n = EXPAND_MAXN + 1; | |
5352 | expand_nmax = 0; | |
5353 | for (nn = 0; nn < n*2; nn += 2) | |
5354 | { | |
5355 | expand_nstring[expand_nmax] = subject + ovector[nn]; | |
5356 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; | |
5357 | } | |
5358 | expand_nmax--; | |
5359 | ||
5360 | /* Copy the characters before the match, plus the expanded insertion. */ | |
5361 | ||
acec9514 | 5362 | yield = string_catn(yield, subject + moffset, ovector[0] - moffset); |
059ec3d9 PH |
5363 | insert = expand_string(sub[2]); |
5364 | if (insert == NULL) goto EXPAND_FAILED; | |
acec9514 | 5365 | yield = string_cat(yield, insert); |
059ec3d9 PH |
5366 | |
5367 | moffset = ovector[1]; | |
5368 | moffsetextra = 0; | |
5369 | emptyopt = 0; | |
5370 | ||
5371 | /* If we have matched an empty string, first check to see if we are at | |
5372 | the end of the subject. If so, the loop is over. Otherwise, mimic | |
5373 | what Perl's /g options does. This turns out to be rather cunning. First | |
5374 | we set PCRE_NOTEMPTY and PCRE_ANCHORED and try the match a non-empty | |
5375 | string at the same point. If this fails (picked up above) we advance to | |
5376 | the next character. */ | |
5377 | ||
5378 | if (ovector[0] == ovector[1]) | |
5379 | { | |
5380 | if (ovector[0] == slen) break; | |
5381 | emptyopt = PCRE_NOTEMPTY | PCRE_ANCHORED; | |
5382 | } | |
5383 | } | |
5384 | ||
5385 | /* All done - restore numerical variables. */ | |
5386 | ||
5387 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5388 | save_expand_nlength); | |
5389 | continue; | |
5390 | } | |
5391 | ||
5392 | /* Handle keyed and numbered substring extraction. If the first argument | |
5393 | consists entirely of digits, then a numerical extraction is assumed. */ | |
5394 | ||
5395 | case EITEM_EXTRACT: | |
5396 | { | |
5397 | int i; | |
1cf59ee7 | 5398 | int j; |
059ec3d9 PH |
5399 | int field_number = 1; |
5400 | BOOL field_number_set = FALSE; | |
5401 | uschar *save_lookup_value = lookup_value; | |
5402 | uschar *sub[3]; | |
5403 | int save_expand_nmax = | |
5404 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5405 | ||
93cc2d6e JH |
5406 | /* While skipping we cannot rely on the data for expansions being |
5407 | available (eg. $item) hence cannot decide on numeric vs. keyed. | |
4c04137d | 5408 | Read a maximum of 5 arguments (including the yes/no) */ |
059ec3d9 | 5409 | |
93cc2d6e JH |
5410 | if (skipping) |
5411 | { | |
5412 | while (isspace(*s)) s++; | |
1cf59ee7 | 5413 | for (j = 5; j > 0 && *s == '{'; j--) |
93cc2d6e JH |
5414 | { |
5415 | if (!expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok)) | |
5416 | goto EXPAND_FAILED; /*{*/ | |
e47376be JH |
5417 | if (*s++ != '}') |
5418 | { | |
5419 | expand_string_message = US"missing '{' for arg of extract"; | |
5420 | goto EXPAND_FAILED_CURLY; | |
5421 | } | |
93cc2d6e JH |
5422 | while (isspace(*s)) s++; |
5423 | } | |
1cf59ee7 JH |
5424 | if ( Ustrncmp(s, "fail", 4) == 0 |
5425 | && (s[4] == '}' || s[4] == ' ' || s[4] == '\t' || !s[4]) | |
5426 | ) | |
5427 | { | |
5428 | s += 4; | |
5429 | while (isspace(*s)) s++; | |
5430 | } | |
93cc2d6e | 5431 | if (*s != '}') |
e47376be JH |
5432 | { |
5433 | expand_string_message = US"missing '}' closing extract"; | |
93cc2d6e | 5434 | goto EXPAND_FAILED_CURLY; |
e47376be | 5435 | } |
93cc2d6e JH |
5436 | } |
5437 | ||
1cf59ee7 | 5438 | else for (i = 0, j = 2; i < j; i++) /* Read the proper number of arguments */ |
059ec3d9 PH |
5439 | { |
5440 | while (isspace(*s)) s++; | |
aa26e137 | 5441 | if (*s == '{') /*}*/ |
059ec3d9 | 5442 | { |
b0e85a8f JH |
5443 | sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
5444 | if (sub[i] == NULL) goto EXPAND_FAILED; /*{*/ | |
e47376be JH |
5445 | if (*s++ != '}') |
5446 | { | |
5447 | expand_string_message = string_sprintf( | |
e2e3255a | 5448 | "missing '}' closing arg %d of extract", i+1); |
e47376be JH |
5449 | goto EXPAND_FAILED_CURLY; |
5450 | } | |
059ec3d9 PH |
5451 | |
5452 | /* After removal of leading and trailing white space, the first | |
5453 | argument must not be empty; if it consists entirely of digits | |
5454 | (optionally preceded by a minus sign), this is a numerical | |
5455 | extraction, and we expect 3 arguments. */ | |
5456 | ||
5457 | if (i == 0) | |
5458 | { | |
5459 | int len; | |
5460 | int x = 0; | |
5461 | uschar *p = sub[0]; | |
5462 | ||
5463 | while (isspace(*p)) p++; | |
5464 | sub[0] = p; | |
5465 | ||
5466 | len = Ustrlen(p); | |
5467 | while (len > 0 && isspace(p[len-1])) len--; | |
5468 | p[len] = 0; | |
5469 | ||
93cc2d6e JH |
5470 | if (*p == 0) |
5471 | { | |
5472 | expand_string_message = US"first argument of \"extract\" must " | |
5473 | "not be empty"; | |
5474 | goto EXPAND_FAILED; | |
5475 | } | |
5476 | ||
5477 | if (*p == '-') | |
5478 | { | |
5479 | field_number = -1; | |
5480 | p++; | |
5481 | } | |
5482 | while (*p != 0 && isdigit(*p)) x = x * 10 + *p++ - '0'; | |
5483 | if (*p == 0) | |
82dbd376 | 5484 | { |
93cc2d6e JH |
5485 | field_number *= x; |
5486 | j = 3; /* Need 3 args */ | |
5487 | field_number_set = TRUE; | |
82dbd376 | 5488 | } |
059ec3d9 PH |
5489 | } |
5490 | } | |
e47376be JH |
5491 | else |
5492 | { | |
5493 | expand_string_message = string_sprintf( | |
e2e3255a | 5494 | "missing '{' for arg %d of extract", i+1); |
e47376be JH |
5495 | goto EXPAND_FAILED_CURLY; |
5496 | } | |
059ec3d9 PH |
5497 | } |
5498 | ||
5499 | /* Extract either the numbered or the keyed substring into $value. If | |
5500 | skipping, just pretend the extraction failed. */ | |
5501 | ||
5502 | lookup_value = skipping? NULL : field_number_set? | |
5503 | expand_gettokened(field_number, sub[1], sub[2]) : | |
5504 | expand_getkeyed(sub[0], sub[1]); | |
5505 | ||
5506 | /* If no string follows, $value gets substituted; otherwise there can | |
5507 | be yes/no strings, as for lookup or if. */ | |
5508 | ||
aa26e137 JH |
5509 | switch(process_yesno( |
5510 | skipping, /* were previously skipping */ | |
5511 | lookup_value != NULL, /* success/failure indicator */ | |
5512 | save_lookup_value, /* value to reset for string2 */ | |
5513 | &s, /* input pointer */ | |
5514 | &yield, /* output pointer */ | |
aa26e137 JH |
5515 | US"extract", /* condition type */ |
5516 | &resetok)) | |
5517 | { | |
5518 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5519 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5520 | } | |
5521 | ||
5522 | /* All done - restore numerical variables. */ | |
5523 | ||
5524 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5525 | save_expand_nlength); | |
5526 | ||
5527 | continue; | |
5528 | } | |
5529 | ||
5530 | /* return the Nth item from a list */ | |
5531 | ||
5532 | case EITEM_LISTEXTRACT: | |
5533 | { | |
5534 | int i; | |
5535 | int field_number = 1; | |
5536 | uschar *save_lookup_value = lookup_value; | |
5537 | uschar *sub[2]; | |
5538 | int save_expand_nmax = | |
5539 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5540 | ||
5541 | /* Read the field & list arguments */ | |
5542 | ||
5543 | for (i = 0; i < 2; i++) | |
5544 | { | |
5545 | while (isspace(*s)) s++; | |
5546 | if (*s != '{') /*}*/ | |
e47376be JH |
5547 | { |
5548 | expand_string_message = string_sprintf( | |
e2e3255a | 5549 | "missing '{' for arg %d of listextract", i+1); |
aa26e137 | 5550 | goto EXPAND_FAILED_CURLY; |
e47376be | 5551 | } |
aa26e137 JH |
5552 | |
5553 | sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
5554 | if (!sub[i]) goto EXPAND_FAILED; /*{*/ | |
e47376be JH |
5555 | if (*s++ != '}') |
5556 | { | |
5557 | expand_string_message = string_sprintf( | |
e2e3255a | 5558 | "missing '}' closing arg %d of listextract", i+1); |
e47376be JH |
5559 | goto EXPAND_FAILED_CURLY; |
5560 | } | |
aa26e137 JH |
5561 | |
5562 | /* After removal of leading and trailing white space, the first | |
5563 | argument must be numeric and nonempty. */ | |
5564 | ||
5565 | if (i == 0) | |
5566 | { | |
5567 | int len; | |
5568 | int x = 0; | |
5569 | uschar *p = sub[0]; | |
5570 | ||
5571 | while (isspace(*p)) p++; | |
5572 | sub[0] = p; | |
5573 | ||
5574 | len = Ustrlen(p); | |
5575 | while (len > 0 && isspace(p[len-1])) len--; | |
5576 | p[len] = 0; | |
5577 | ||
5578 | if (!*p && !skipping) | |
5579 | { | |
5580 | expand_string_message = US"first argument of \"listextract\" must " | |
5581 | "not be empty"; | |
5582 | goto EXPAND_FAILED; | |
5583 | } | |
5584 | ||
5585 | if (*p == '-') | |
5586 | { | |
5587 | field_number = -1; | |
5588 | p++; | |
5589 | } | |
5590 | while (*p && isdigit(*p)) x = x * 10 + *p++ - '0'; | |
5591 | if (*p) | |
5592 | { | |
5593 | expand_string_message = US"first argument of \"listextract\" must " | |
5594 | "be numeric"; | |
5595 | goto EXPAND_FAILED; | |
5596 | } | |
5597 | field_number *= x; | |
5598 | } | |
5599 | } | |
5600 | ||
5601 | /* Extract the numbered element into $value. If | |
5602 | skipping, just pretend the extraction failed. */ | |
5603 | ||
5604 | lookup_value = skipping? NULL : expand_getlistele(field_number, sub[1]); | |
5605 | ||
5606 | /* If no string follows, $value gets substituted; otherwise there can | |
5607 | be yes/no strings, as for lookup or if. */ | |
5608 | ||
059ec3d9 PH |
5609 | switch(process_yesno( |
5610 | skipping, /* were previously skipping */ | |
5611 | lookup_value != NULL, /* success/failure indicator */ | |
5612 | save_lookup_value, /* value to reset for string2 */ | |
5613 | &s, /* input pointer */ | |
5614 | &yield, /* output pointer */ | |
f90d49f7 | 5615 | US"listextract", /* condition type */ |
b0e85a8f | 5616 | &resetok)) |
059ec3d9 PH |
5617 | { |
5618 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5619 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5620 | } | |
5621 | ||
5622 | /* All done - restore numerical variables. */ | |
5623 | ||
5624 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5625 | save_expand_nlength); | |
5626 | ||
5627 | continue; | |
5628 | } | |
1a46a8c5 | 5629 | |
9d1c15ef JH |
5630 | #ifdef SUPPORT_TLS |
5631 | case EITEM_CERTEXTRACT: | |
5632 | { | |
9d1c15ef JH |
5633 | uschar *save_lookup_value = lookup_value; |
5634 | uschar *sub[2]; | |
5635 | int save_expand_nmax = | |
5636 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5637 | ||
5638 | /* Read the field argument */ | |
5639 | while (isspace(*s)) s++; | |
5640 | if (*s != '{') /*}*/ | |
e47376be JH |
5641 | { |
5642 | expand_string_message = US"missing '{' for field arg of certextract"; | |
9d1c15ef | 5643 | goto EXPAND_FAILED_CURLY; |
e47376be | 5644 | } |
9d1c15ef JH |
5645 | sub[0] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
5646 | if (!sub[0]) goto EXPAND_FAILED; /*{*/ | |
e47376be JH |
5647 | if (*s++ != '}') |
5648 | { | |
5649 | expand_string_message = US"missing '}' closing field arg of certextract"; | |
5650 | goto EXPAND_FAILED_CURLY; | |
5651 | } | |
9d1c15ef JH |
5652 | /* strip spaces fore & aft */ |
5653 | { | |
5654 | int len; | |
9d1c15ef JH |
5655 | uschar *p = sub[0]; |
5656 | ||
5657 | while (isspace(*p)) p++; | |
5658 | sub[0] = p; | |
5659 | ||
5660 | len = Ustrlen(p); | |
5661 | while (len > 0 && isspace(p[len-1])) len--; | |
5662 | p[len] = 0; | |
5663 | } | |
5664 | ||
5665 | /* inspect the cert argument */ | |
5666 | while (isspace(*s)) s++; | |
5667 | if (*s != '{') /*}*/ | |
e47376be JH |
5668 | { |
5669 | expand_string_message = US"missing '{' for cert variable arg of certextract"; | |
9d1c15ef | 5670 | goto EXPAND_FAILED_CURLY; |
e47376be | 5671 | } |
9d1c15ef JH |
5672 | if (*++s != '$') |
5673 | { | |
5674 | expand_string_message = US"second argument of \"certextract\" must " | |
5675 | "be a certificate variable"; | |
5676 | goto EXPAND_FAILED; | |
5677 | } | |
5678 | sub[1] = expand_string_internal(s+1, TRUE, &s, skipping, FALSE, &resetok); | |
5679 | if (!sub[1]) goto EXPAND_FAILED; /*{*/ | |
e47376be JH |
5680 | if (*s++ != '}') |
5681 | { | |
5682 | expand_string_message = US"missing '}' closing cert variable arg of certextract"; | |
5683 | goto EXPAND_FAILED_CURLY; | |
5684 | } | |
9d1c15ef JH |
5685 | |
5686 | if (skipping) | |
5687 | lookup_value = NULL; | |
5688 | else | |
5689 | { | |
5690 | lookup_value = expand_getcertele(sub[0], sub[1]); | |
5691 | if (*expand_string_message) goto EXPAND_FAILED; | |
5692 | } | |
5693 | switch(process_yesno( | |
5694 | skipping, /* were previously skipping */ | |
5695 | lookup_value != NULL, /* success/failure indicator */ | |
5696 | save_lookup_value, /* value to reset for string2 */ | |
5697 | &s, /* input pointer */ | |
5698 | &yield, /* output pointer */ | |
f90d49f7 | 5699 | US"certextract", /* condition type */ |
9d1c15ef JH |
5700 | &resetok)) |
5701 | { | |
5702 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5703 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5704 | } | |
5705 | ||
5706 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5707 | save_expand_nlength); | |
5708 | continue; | |
5709 | } | |
5710 | #endif /*SUPPORT_TLS*/ | |
5711 | ||
29f89cad PH |
5712 | /* Handle list operations */ |
5713 | ||
5714 | case EITEM_FILTER: | |
5715 | case EITEM_MAP: | |
5716 | case EITEM_REDUCE: | |
5717 | { | |
5718 | int sep = 0; | |
acec9514 | 5719 | int save_ptr = yield->ptr; |
29f89cad | 5720 | uschar outsep[2] = { '\0', '\0' }; |
55414b25 | 5721 | const uschar *list, *expr, *temp; |
29f89cad PH |
5722 | uschar *save_iterate_item = iterate_item; |
5723 | uschar *save_lookup_value = lookup_value; | |
5724 | ||
5725 | while (isspace(*s)) s++; | |
e47376be JH |
5726 | if (*s++ != '{') |
5727 | { | |
5728 | expand_string_message = | |
5729 | string_sprintf("missing '{' for first arg of %s", name); | |
5730 | goto EXPAND_FAILED_CURLY; | |
5731 | } | |
29f89cad | 5732 | |
b0e85a8f | 5733 | list = expand_string_internal(s, TRUE, &s, skipping, TRUE, &resetok); |
29f89cad | 5734 | if (list == NULL) goto EXPAND_FAILED; |
e47376be JH |
5735 | if (*s++ != '}') |
5736 | { | |
5737 | expand_string_message = | |
5738 | string_sprintf("missing '}' closing first arg of %s", name); | |
5739 | goto EXPAND_FAILED_CURLY; | |
5740 | } | |
29f89cad PH |
5741 | |
5742 | if (item_type == EITEM_REDUCE) | |
5743 | { | |
55414b25 | 5744 | uschar * t; |
29f89cad | 5745 | while (isspace(*s)) s++; |
e47376be JH |
5746 | if (*s++ != '{') |
5747 | { | |
5748 | expand_string_message = US"missing '{' for second arg of reduce"; | |
5749 | goto EXPAND_FAILED_CURLY; | |
5750 | } | |
55414b25 | 5751 | t = expand_string_internal(s, TRUE, &s, skipping, TRUE, &resetok); |
e1af7642 | 5752 | if (!t) goto EXPAND_FAILED; |
55414b25 | 5753 | lookup_value = t; |
e47376be JH |
5754 | if (*s++ != '}') |
5755 | { | |
5756 | expand_string_message = US"missing '}' closing second arg of reduce"; | |
5757 | goto EXPAND_FAILED_CURLY; | |
5758 | } | |
29f89cad PH |
5759 | } |
5760 | ||
5761 | while (isspace(*s)) s++; | |
e47376be JH |
5762 | if (*s++ != '{') |
5763 | { | |
5764 | expand_string_message = | |
5765 | string_sprintf("missing '{' for last arg of %s", name); | |
5766 | goto EXPAND_FAILED_CURLY; | |
5767 | } | |
29f89cad PH |
5768 | |
5769 | expr = s; | |
5770 | ||
5771 | /* For EITEM_FILTER, call eval_condition once, with result discarded (as | |
5772 | if scanning a "false" part). This allows us to find the end of the | |
5773 | condition, because if the list is empty, we won't actually evaluate the | |
5774 | condition for real. For EITEM_MAP and EITEM_REDUCE, do the same, using | |
5775 | the normal internal expansion function. */ | |
5776 | ||
5777 | if (item_type == EITEM_FILTER) | |
5778 | { | |
b0e85a8f | 5779 | temp = eval_condition(expr, &resetok, NULL); |
29f89cad PH |
5780 | if (temp != NULL) s = temp; |
5781 | } | |
5782 | else | |
b0e85a8f | 5783 | temp = expand_string_internal(s, TRUE, &s, TRUE, TRUE, &resetok); |
29f89cad PH |
5784 | |
5785 | if (temp == NULL) | |
5786 | { | |
5787 | expand_string_message = string_sprintf("%s inside \"%s\" item", | |
5788 | expand_string_message, name); | |
5789 | goto EXPAND_FAILED; | |
5790 | } | |
5791 | ||
5792 | while (isspace(*s)) s++; | |
5793 | if (*s++ != '}') | |
2e23003a | 5794 | { /*{*/ |
29f89cad | 5795 | expand_string_message = string_sprintf("missing } at end of condition " |
d584cdca JH |
5796 | "or expression inside \"%s\"; could be an unquoted } in the content", |
5797 | name); | |
29f89cad PH |
5798 | goto EXPAND_FAILED; |
5799 | } | |
5800 | ||
2e23003a | 5801 | while (isspace(*s)) s++; /*{*/ |
29f89cad | 5802 | if (*s++ != '}') |
2e23003a | 5803 | { /*{*/ |
29f89cad PH |
5804 | expand_string_message = string_sprintf("missing } at end of \"%s\"", |
5805 | name); | |
5806 | goto EXPAND_FAILED; | |
5807 | } | |
5808 | ||
5809 | /* If we are skipping, we can now just move on to the next item. When | |
5810 | processing for real, we perform the iteration. */ | |
5811 | ||
5812 | if (skipping) continue; | |
9e09521e | 5813 | while ((iterate_item = string_nextinlist(&list, &sep, NULL, 0))) |
29f89cad PH |
5814 | { |
5815 | *outsep = (uschar)sep; /* Separator as a string */ | |
5816 | ||
9e09521e JH |
5817 | DEBUG(D_expand) debug_printf_indent("%s: $item = '%s' $value = '%s'\n", |
5818 | name, iterate_item, lookup_value); | |
29f89cad PH |
5819 | |
5820 | if (item_type == EITEM_FILTER) | |
5821 | { | |
5822 | BOOL condresult; | |
b0e85a8f | 5823 | if (eval_condition(expr, &resetok, &condresult) == NULL) |
29f89cad | 5824 | { |
e58c13cc PH |
5825 | iterate_item = save_iterate_item; |
5826 | lookup_value = save_lookup_value; | |
29f89cad PH |
5827 | expand_string_message = string_sprintf("%s inside \"%s\" condition", |
5828 | expand_string_message, name); | |
5829 | goto EXPAND_FAILED; | |
5830 | } | |
e1d04f48 | 5831 | DEBUG(D_expand) debug_printf_indent("%s: condition is %s\n", name, |
29f89cad PH |
5832 | condresult? "true":"false"); |
5833 | if (condresult) | |
5834 | temp = iterate_item; /* TRUE => include this item */ | |
5835 | else | |
5836 | continue; /* FALSE => skip this item */ | |
5837 | } | |
5838 | ||
5839 | /* EITEM_MAP and EITEM_REDUCE */ | |
5840 | ||
5841 | else | |
5842 | { | |
55414b25 JH |
5843 | uschar * t = expand_string_internal(expr, TRUE, NULL, skipping, TRUE, &resetok); |
5844 | temp = t; | |
29f89cad PH |
5845 | if (temp == NULL) |
5846 | { | |
e58c13cc | 5847 | iterate_item = save_iterate_item; |
29f89cad PH |
5848 | expand_string_message = string_sprintf("%s inside \"%s\" item", |
5849 | expand_string_message, name); | |
5850 | goto EXPAND_FAILED; | |
5851 | } | |
5852 | if (item_type == EITEM_REDUCE) | |
5853 | { | |
55414b25 | 5854 | lookup_value = t; /* Update the value of $value */ |
29f89cad PH |
5855 | continue; /* and continue the iteration */ |
5856 | } | |
5857 | } | |
5858 | ||
5859 | /* We reach here for FILTER if the condition is true, always for MAP, | |
5860 | and never for REDUCE. The value in "temp" is to be added to the output | |
5861 | list that is being created, ensuring that any occurrences of the | |
5862 | separator character are doubled. Unless we are dealing with the first | |
5863 | item of the output list, add in a space if the new item begins with the | |
5864 | separator character, or is an empty string. */ | |
5865 | ||
acec9514 JH |
5866 | if (yield->ptr != save_ptr && (temp[0] == *outsep || temp[0] == 0)) |
5867 | yield = string_catn(yield, US" ", 1); | |
29f89cad PH |
5868 | |
5869 | /* Add the string in "temp" to the output list that we are building, | |
5870 | This is done in chunks by searching for the separator character. */ | |
5871 | ||
5872 | for (;;) | |
5873 | { | |
5874 | size_t seglen = Ustrcspn(temp, outsep); | |
c2f669a4 | 5875 | |
acec9514 | 5876 | yield = string_catn(yield, temp, seglen + 1); |
29f89cad PH |
5877 | |
5878 | /* If we got to the end of the string we output one character | |
5879 | too many; backup and end the loop. Otherwise arrange to double the | |
5880 | separator. */ | |
5881 | ||
acec9514 JH |
5882 | if (temp[seglen] == '\0') { yield->ptr--; break; } |
5883 | yield = string_catn(yield, outsep, 1); | |
29f89cad PH |
5884 | temp += seglen + 1; |
5885 | } | |
5886 | ||
5887 | /* Output a separator after the string: we will remove the redundant | |
5888 | final one at the end. */ | |
5889 | ||
acec9514 | 5890 | yield = string_catn(yield, outsep, 1); |
29f89cad PH |
5891 | } /* End of iteration over the list loop */ |
5892 | ||
5893 | /* REDUCE has generated no output above: output the final value of | |
5894 | $value. */ | |
5895 | ||
5896 | if (item_type == EITEM_REDUCE) | |
5897 | { | |
acec9514 | 5898 | yield = string_cat(yield, lookup_value); |
29f89cad PH |
5899 | lookup_value = save_lookup_value; /* Restore $value */ |
5900 | } | |
5901 | ||
5902 | /* FILTER and MAP generate lists: if they have generated anything, remove | |
5903 | the redundant final separator. Even though an empty item at the end of a | |
5904 | list does not count, this is tidier. */ | |
5905 | ||
acec9514 | 5906 | else if (yield->ptr != save_ptr) yield->ptr--; |
29f89cad PH |
5907 | |
5908 | /* Restore preserved $item */ | |
5909 | ||
5910 | iterate_item = save_iterate_item; | |
5911 | continue; | |
5912 | } | |
5913 | ||
ac4ef9bd JH |
5914 | case EITEM_SORT: |
5915 | { | |
5916 | int sep = 0; | |
55414b25 | 5917 | const uschar *srclist, *cmp, *xtract; |
ac4ef9bd | 5918 | uschar *srcitem; |
55414b25 | 5919 | const uschar *dstlist = NULL, *dstkeylist = NULL; |
ac4ef9bd JH |
5920 | uschar * tmp; |
5921 | uschar *save_iterate_item = iterate_item; | |
5922 | ||
5923 | while (isspace(*s)) s++; | |
e47376be JH |
5924 | if (*s++ != '{') |
5925 | { | |
5926 | expand_string_message = US"missing '{' for list arg of sort"; | |
5927 | goto EXPAND_FAILED_CURLY; | |
5928 | } | |
ac4ef9bd JH |
5929 | |
5930 | srclist = expand_string_internal(s, TRUE, &s, skipping, TRUE, &resetok); | |
5931 | if (!srclist) goto EXPAND_FAILED; | |
e47376be JH |
5932 | if (*s++ != '}') |
5933 | { | |
5934 | expand_string_message = US"missing '}' closing list arg of sort"; | |
5935 | goto EXPAND_FAILED_CURLY; | |
5936 | } | |
ac4ef9bd JH |
5937 | |
5938 | while (isspace(*s)) s++; | |
e47376be JH |
5939 | if (*s++ != '{') |
5940 | { | |
5941 | expand_string_message = US"missing '{' for comparator arg of sort"; | |
5942 | goto EXPAND_FAILED_CURLY; | |
5943 | } | |
ac4ef9bd JH |
5944 | |
5945 | cmp = expand_string_internal(s, TRUE, &s, skipping, FALSE, &resetok); | |
5946 | if (!cmp) goto EXPAND_FAILED; | |
e47376be JH |
5947 | if (*s++ != '}') |
5948 | { | |
5949 | expand_string_message = US"missing '}' closing comparator arg of sort"; | |
5950 | goto EXPAND_FAILED_CURLY; | |
5951 | } | |
ac4ef9bd JH |
5952 | |
5953 | while (isspace(*s)) s++; | |
e47376be JH |
5954 | if (*s++ != '{') |
5955 | { | |
5956 | expand_string_message = US"missing '{' for extractor arg of sort"; | |
5957 | goto EXPAND_FAILED_CURLY; | |
5958 | } | |
ac4ef9bd JH |
5959 | |
5960 | xtract = s; | |
5961 | tmp = expand_string_internal(s, TRUE, &s, TRUE, TRUE, &resetok); | |
5962 | if (!tmp) goto EXPAND_FAILED; | |
5963 | xtract = string_copyn(xtract, s - xtract); | |
5964 | ||
e47376be JH |
5965 | if (*s++ != '}') |
5966 | { | |
5967 | expand_string_message = US"missing '}' closing extractor arg of sort"; | |
5968 | goto EXPAND_FAILED_CURLY; | |
5969 | } | |
ac4ef9bd JH |
5970 | /*{*/ |
5971 | if (*s++ != '}') | |
5972 | { /*{*/ | |
5973 | expand_string_message = US"missing } at end of \"sort\""; | |
5974 | goto EXPAND_FAILED; | |
5975 | } | |
5976 | ||
5977 | if (skipping) continue; | |
5978 | ||
5979 | while ((srcitem = string_nextinlist(&srclist, &sep, NULL, 0))) | |
5980 | { | |
5981 | uschar * dstitem; | |
acec9514 JH |
5982 | gstring * newlist = NULL; |
5983 | gstring * newkeylist = NULL; | |
ac4ef9bd JH |
5984 | uschar * srcfield; |
5985 | ||
e1d04f48 | 5986 | DEBUG(D_expand) debug_printf_indent("%s: $item = \"%s\"\n", name, srcitem); |
ac4ef9bd JH |
5987 | |
5988 | /* extract field for comparisons */ | |
5989 | iterate_item = srcitem; | |
5990 | if ( !(srcfield = expand_string_internal(xtract, FALSE, NULL, FALSE, | |
5991 | TRUE, &resetok)) | |
5992 | || !*srcfield) | |
5993 | { | |
5994 | expand_string_message = string_sprintf( | |
5995 | "field-extract in sort: \"%s\"", xtract); | |
5996 | goto EXPAND_FAILED; | |
5997 | } | |
5998 | ||
5999 | /* Insertion sort */ | |
6000 | ||
6001 | /* copy output list until new-item < list-item */ | |
6002 | while ((dstitem = string_nextinlist(&dstlist, &sep, NULL, 0))) | |
6003 | { | |
6004 | uschar * dstfield; | |
6005 | uschar * expr; | |
6006 | BOOL before; | |
6007 | ||
6008 | /* field for comparison */ | |
6009 | if (!(dstfield = string_nextinlist(&dstkeylist, &sep, NULL, 0))) | |
6010 | goto sort_mismatch; | |
6011 | ||
6012 | /* build and run condition string */ | |
6013 | expr = string_sprintf("%s{%s}{%s}", cmp, srcfield, dstfield); | |
6014 | ||
e1d04f48 | 6015 | DEBUG(D_expand) debug_printf_indent("%s: cond = \"%s\"\n", name, expr); |
ac4ef9bd JH |
6016 | if (!eval_condition(expr, &resetok, &before)) |
6017 | { | |
6018 | expand_string_message = string_sprintf("comparison in sort: %s", | |
6019 | expr); | |
6020 | goto EXPAND_FAILED; | |
6021 | } | |
6022 | ||
6023 | if (before) | |
6024 | { | |
6025 | /* New-item sorts before this dst-item. Append new-item, | |
6026 | then dst-item, then remainder of dst list. */ | |
6027 | ||
acec9514 JH |
6028 | newlist = string_append_listele(newlist, sep, srcitem); |
6029 | newkeylist = string_append_listele(newkeylist, sep, srcfield); | |
ac4ef9bd JH |
6030 | srcitem = NULL; |
6031 | ||
acec9514 JH |
6032 | newlist = string_append_listele(newlist, sep, dstitem); |
6033 | newkeylist = string_append_listele(newkeylist, sep, dstfield); | |
ac4ef9bd JH |
6034 | |
6035 | while ((dstitem = string_nextinlist(&dstlist, &sep, NULL, 0))) | |
6036 | { | |
6037 | if (!(dstfield = string_nextinlist(&dstkeylist, &sep, NULL, 0))) | |
6038 | goto sort_mismatch; | |
acec9514 JH |
6039 | newlist = string_append_listele(newlist, sep, dstitem); |
6040 | newkeylist = string_append_listele(newkeylist, sep, dstfield); | |
ac4ef9bd JH |
6041 | } |
6042 | ||
6043 | break; | |
6044 | } | |
6045 | ||
acec9514 JH |
6046 | newlist = string_append_listele(newlist, sep, dstitem); |
6047 | newkeylist = string_append_listele(newkeylist, sep, dstfield); | |
ac4ef9bd JH |
6048 | } |
6049 | ||
6050 | /* If we ran out of dstlist without consuming srcitem, append it */ | |
6051 | if (srcitem) | |
6052 | { | |
acec9514 JH |
6053 | newlist = string_append_listele(newlist, sep, srcitem); |
6054 | newkeylist = string_append_listele(newkeylist, sep, srcfield); | |
ac4ef9bd JH |
6055 | } |
6056 | ||
acec9514 JH |
6057 | dstlist = newlist->s; |
6058 | dstkeylist = newkeylist->s; | |
ac4ef9bd | 6059 | |
e1d04f48 JH |
6060 | DEBUG(D_expand) debug_printf_indent("%s: dstlist = \"%s\"\n", name, dstlist); |
6061 | DEBUG(D_expand) debug_printf_indent("%s: dstkeylist = \"%s\"\n", name, dstkeylist); | |
ac4ef9bd JH |
6062 | } |
6063 | ||
6064 | if (dstlist) | |
acec9514 | 6065 | yield = string_cat(yield, dstlist); |
ac4ef9bd JH |
6066 | |
6067 | /* Restore preserved $item */ | |
6068 | iterate_item = save_iterate_item; | |
6069 | continue; | |
6070 | ||
6071 | sort_mismatch: | |
6072 | expand_string_message = US"Internal error in sort (list mismatch)"; | |
6073 | goto EXPAND_FAILED; | |
6074 | } | |
6075 | ||
29f89cad | 6076 | |
2e23003a | 6077 | /* If ${dlfunc } support is configured, handle calling dynamically-loaded |
1a46a8c5 PH |
6078 | functions, unless locked out at this time. Syntax is ${dlfunc{file}{func}} |
6079 | or ${dlfunc{file}{func}{arg}} or ${dlfunc{file}{func}{arg1}{arg2}} or up to | |
6080 | a maximum of EXPAND_DLFUNC_MAX_ARGS arguments (defined below). */ | |
6081 | ||
6082 | #define EXPAND_DLFUNC_MAX_ARGS 8 | |
6083 | ||
6084 | case EITEM_DLFUNC: | |
089fc87a JH |
6085 | #ifndef EXPAND_DLFUNC |
6086 | expand_string_message = US"\"${dlfunc\" encountered, but this facility " /*}*/ | |
6087 | "is not included in this binary"; | |
6088 | goto EXPAND_FAILED; | |
1a46a8c5 | 6089 | |
089fc87a | 6090 | #else /* EXPAND_DLFUNC */ |
1a46a8c5 PH |
6091 | { |
6092 | tree_node *t; | |
6093 | exim_dlfunc_t *func; | |
6094 | uschar *result; | |
6095 | int status, argc; | |
6096 | uschar *argv[EXPAND_DLFUNC_MAX_ARGS + 3]; | |
6097 | ||
6098 | if ((expand_forbid & RDO_DLFUNC) != 0) | |
6099 | { | |
6100 | expand_string_message = | |
6101 | US"dynamically-loaded functions are not permitted"; | |
6102 | goto EXPAND_FAILED; | |
6103 | } | |
6104 | ||
6105 | switch(read_subs(argv, EXPAND_DLFUNC_MAX_ARGS + 2, 2, &s, skipping, | |
b0e85a8f | 6106 | TRUE, US"dlfunc", &resetok)) |
1a46a8c5 PH |
6107 | { |
6108 | case 1: goto EXPAND_FAILED_CURLY; | |
6109 | case 2: | |
6110 | case 3: goto EXPAND_FAILED; | |
6111 | } | |
6112 | ||
6113 | /* If skipping, we don't actually do anything */ | |
6114 | ||
6115 | if (skipping) continue; | |
6116 | ||
6117 | /* Look up the dynamically loaded object handle in the tree. If it isn't | |
6118 | found, dlopen() the file and put the handle in the tree for next time. */ | |
6119 | ||
6120 | t = tree_search(dlobj_anchor, argv[0]); | |
6121 | if (t == NULL) | |
6122 | { | |
6123 | void *handle = dlopen(CS argv[0], RTLD_LAZY); | |
6124 | if (handle == NULL) | |
6125 | { | |
6126 | expand_string_message = string_sprintf("dlopen \"%s\" failed: %s", | |
6127 | argv[0], dlerror()); | |
6128 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", expand_string_message); | |
6129 | goto EXPAND_FAILED; | |
6130 | } | |
6131 | t = store_get_perm(sizeof(tree_node) + Ustrlen(argv[0])); | |
6132 | Ustrcpy(t->name, argv[0]); | |
6133 | t->data.ptr = handle; | |
6134 | (void)tree_insertnode(&dlobj_anchor, t); | |
6135 | } | |
6136 | ||
6137 | /* Having obtained the dynamically loaded object handle, look up the | |
6138 | function pointer. */ | |
6139 | ||
6140 | func = (exim_dlfunc_t *)dlsym(t->data.ptr, CS argv[1]); | |
6141 | if (func == NULL) | |
6142 | { | |
6143 | expand_string_message = string_sprintf("dlsym \"%s\" in \"%s\" failed: " | |
6144 | "%s", argv[1], argv[0], dlerror()); | |
7dbf77c9 | 6145 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", expand_string_message); |
1a46a8c5 PH |
6146 | goto EXPAND_FAILED; |
6147 | } | |
6148 | ||
6149 | /* Call the function and work out what to do with the result. If it | |
6150 | returns OK, we have a replacement string; if it returns DEFER then | |
6151 | expansion has failed in a non-forced manner; if it returns FAIL then | |
6152 | failure was forced; if it returns ERROR or any other value there's a | |
d6b4d938 TF |
6153 | problem, so panic slightly. In any case, assume that the function has |
6154 | side-effects on the store that must be preserved. */ | |
1a46a8c5 | 6155 | |
d6b4d938 | 6156 | resetok = FALSE; |
1a46a8c5 PH |
6157 | result = NULL; |
6158 | for (argc = 0; argv[argc] != NULL; argc++); | |
6159 | status = func(&result, argc - 2, &argv[2]); | |
6160 | if(status == OK) | |
6161 | { | |
6162 | if (result == NULL) result = US""; | |
acec9514 | 6163 | yield = string_cat(yield, result); |
1a46a8c5 PH |
6164 | continue; |
6165 | } | |
6166 | else | |
6167 | { | |
6168 | expand_string_message = result == NULL ? US"(no message)" : result; | |
6169 | if(status == FAIL_FORCED) expand_string_forcedfail = TRUE; | |
6170 | else if(status != FAIL) | |
6171 | log_write(0, LOG_MAIN|LOG_PANIC, "dlfunc{%s}{%s} failed (%d): %s", | |
6172 | argv[0], argv[1], status, expand_string_message); | |
6173 | goto EXPAND_FAILED; | |
6174 | } | |
6175 | } | |
089fc87a JH |
6176 | #endif /* EXPAND_DLFUNC */ |
6177 | ||
6178 | case EITEM_ENV: /* ${env {name} {val_if_found} {val_if_unfound}} */ | |
6179 | { | |
6180 | uschar * key; | |
6181 | uschar *save_lookup_value = lookup_value; | |
6182 | ||
6183 | while (isspace(*s)) s++; | |
6184 | if (*s != '{') /*}*/ | |
6185 | goto EXPAND_FAILED; | |
6186 | ||
6187 | key = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
6188 | if (!key) goto EXPAND_FAILED; /*{*/ | |
e47376be JH |
6189 | if (*s++ != '}') |
6190 | { | |
6191 | expand_string_message = US"missing '{' for name arg of env"; | |
6192 | goto EXPAND_FAILED_CURLY; | |
6193 | } | |
089fc87a JH |
6194 | |
6195 | lookup_value = US getenv(CS key); | |
6196 | ||
6197 | switch(process_yesno( | |
6198 | skipping, /* were previously skipping */ | |
6199 | lookup_value != NULL, /* success/failure indicator */ | |
6200 | save_lookup_value, /* value to reset for string2 */ | |
6201 | &s, /* input pointer */ | |
6202 | &yield, /* output pointer */ | |
089fc87a JH |
6203 | US"env", /* condition type */ |
6204 | &resetok)) | |
6205 | { | |
6206 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
6207 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
6208 | } | |
6209 | continue; | |
6210 | } | |
2e23003a | 6211 | } /* EITEM_* switch */ |
059ec3d9 PH |
6212 | |
6213 | /* Control reaches here if the name is not recognized as one of the more | |
6214 | complicated expansion items. Check for the "operator" syntax (name terminated | |
6215 | by a colon). Some of the operators have arguments, separated by _ from the | |
6216 | name. */ | |
6217 | ||
6218 | if (*s == ':') | |
6219 | { | |
6220 | int c; | |
6221 | uschar *arg = NULL; | |
6a8a60e0 | 6222 | uschar *sub; |
e3dd1d67 | 6223 | var_entry *vp = NULL; |
059ec3d9 PH |
6224 | |
6225 | /* Owing to an historical mis-design, an underscore may be part of the | |
6226 | operator name, or it may introduce arguments. We therefore first scan the | |
6227 | table of names that contain underscores. If there is no match, we cut off | |
6228 | the arguments and then scan the main table. */ | |
6229 | ||
6a8a60e0 | 6230 | if ((c = chop_match(name, op_table_underscore, |
0539a19d | 6231 | nelem(op_table_underscore))) < 0) |
059ec3d9 PH |
6232 | { |
6233 | arg = Ustrchr(name, '_'); | |
6234 | if (arg != NULL) *arg = 0; | |
0539a19d JH |
6235 | c = chop_match(name, op_table_main, nelem(op_table_main)); |
6236 | if (c >= 0) c += nelem(op_table_underscore); | |
059ec3d9 PH |
6237 | if (arg != NULL) *arg++ = '_'; /* Put back for error messages */ |
6238 | } | |
6239 | ||
6a8a60e0 JH |
6240 | /* Deal specially with operators that might take a certificate variable |
6241 | as we do not want to do the usual expansion. For most, expand the string.*/ | |
6242 | switch(c) | |
6243 | { | |
80c974f8 | 6244 | #ifdef SUPPORT_TLS |
6a8a60e0 | 6245 | case EOP_MD5: |
9ef9101c JH |
6246 | case EOP_SHA1: |
6247 | case EOP_SHA256: | |
59b87190 | 6248 | case EOP_BASE64: |
6a8a60e0 JH |
6249 | if (s[1] == '$') |
6250 | { | |
55414b25 | 6251 | const uschar * s1 = s; |
6a8a60e0 JH |
6252 | sub = expand_string_internal(s+2, TRUE, &s1, skipping, |
6253 | FALSE, &resetok); | |
6254 | if (!sub) goto EXPAND_FAILED; /*{*/ | |
e47376be JH |
6255 | if (*s1 != '}') |
6256 | { | |
6257 | expand_string_message = | |
6258 | string_sprintf("missing '}' closing cert arg of %s", name); | |
6259 | goto EXPAND_FAILED_CURLY; | |
6260 | } | |
6a8a60e0 JH |
6261 | if ((vp = find_var_ent(sub)) && vp->type == vtype_cert) |
6262 | { | |
6263 | s = s1+1; | |
6264 | break; | |
6265 | } | |
fabe4dd9 | 6266 | vp = NULL; |
6a8a60e0 | 6267 | } |
6a8a60e0 | 6268 | /*FALLTHROUGH*/ |
80c974f8 | 6269 | #endif |
6a8a60e0 JH |
6270 | default: |
6271 | sub = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
6272 | if (!sub) goto EXPAND_FAILED; | |
6273 | s++; | |
6274 | break; | |
6275 | } | |
6276 | ||
059ec3d9 PH |
6277 | /* If we are skipping, we don't need to perform the operation at all. |
6278 | This matters for operations like "mask", because the data may not be | |
6279 | in the correct format when skipping. For example, the expression may test | |
6280 | for the existence of $sender_host_address before trying to mask it. For | |
6281 | other operations, doing them may not fail, but it is a waste of time. */ | |
6282 | ||
6283 | if (skipping && c >= 0) continue; | |
6284 | ||
6285 | /* Otherwise, switch on the operator type */ | |
6286 | ||
6287 | switch(c) | |
6288 | { | |
03ca21f8 JH |
6289 | case EOP_BASE32: |
6290 | { | |
6291 | uschar *t; | |
6292 | unsigned long int n = Ustrtoul(sub, &t, 10); | |
acec9514 | 6293 | gstring * g = NULL; |
03ca21f8 JH |
6294 | |
6295 | if (*t != 0) | |
6296 | { | |
6297 | expand_string_message = string_sprintf("argument for base32 " | |
6298 | "operator is \"%s\", which is not a decimal number", sub); | |
6299 | goto EXPAND_FAILED; | |
6300 | } | |
6301 | for ( ; n; n >>= 5) | |
acec9514 | 6302 | g = string_catn(g, &base32_chars[n & 0x1f], 1); |
03ca21f8 | 6303 | |
acec9514 | 6304 | if (g) while (g->ptr > 0) yield = string_catn(yield, &g->s[--g->ptr], 1); |
03ca21f8 JH |
6305 | continue; |
6306 | } | |
6307 | ||
6308 | case EOP_BASE32D: | |
6309 | { | |
6310 | uschar *tt = sub; | |
6311 | unsigned long int n = 0; | |
6312 | uschar * s; | |
6313 | while (*tt) | |
6314 | { | |
6315 | uschar * t = Ustrchr(base32_chars, *tt++); | |
6316 | if (t == NULL) | |
6317 | { | |
6318 | expand_string_message = string_sprintf("argument for base32d " | |
6319 | "operator is \"%s\", which is not a base 32 number", sub); | |
6320 | goto EXPAND_FAILED; | |
6321 | } | |
6322 | n = n * 32 + (t - base32_chars); | |
6323 | } | |
6324 | s = string_sprintf("%ld", n); | |
acec9514 | 6325 | yield = string_cat(yield, s); |
03ca21f8 JH |
6326 | continue; |
6327 | } | |
6328 | ||
059ec3d9 PH |
6329 | case EOP_BASE62: |
6330 | { | |
6331 | uschar *t; | |
6332 | unsigned long int n = Ustrtoul(sub, &t, 10); | |
6333 | if (*t != 0) | |
6334 | { | |
6335 | expand_string_message = string_sprintf("argument for base62 " | |
6336 | "operator is \"%s\", which is not a decimal number", sub); | |
6337 | goto EXPAND_FAILED; | |
6338 | } | |
6339 | t = string_base62(n); | |
acec9514 | 6340 | yield = string_cat(yield, t); |
059ec3d9 PH |
6341 | continue; |
6342 | } | |
6343 | ||
9a799bc0 PH |
6344 | /* Note that for Darwin and Cygwin, BASE_62 actually has the value 36 */ |
6345 | ||
059ec3d9 PH |
6346 | case EOP_BASE62D: |
6347 | { | |
6348 | uschar buf[16]; | |
6349 | uschar *tt = sub; | |
6350 | unsigned long int n = 0; | |
6351 | while (*tt != 0) | |
6352 | { | |
6353 | uschar *t = Ustrchr(base62_chars, *tt++); | |
6354 | if (t == NULL) | |
6355 | { | |
6356 | expand_string_message = string_sprintf("argument for base62d " | |
9a799bc0 PH |
6357 | "operator is \"%s\", which is not a base %d number", sub, |
6358 | BASE_62); | |
059ec3d9 PH |
6359 | goto EXPAND_FAILED; |
6360 | } | |
9a799bc0 | 6361 | n = n * BASE_62 + (t - base62_chars); |
059ec3d9 PH |
6362 | } |
6363 | (void)sprintf(CS buf, "%ld", n); | |
acec9514 | 6364 | yield = string_cat(yield, buf); |
059ec3d9 PH |
6365 | continue; |
6366 | } | |
6367 | ||
6368 | case EOP_EXPAND: | |
6369 | { | |
b0e85a8f | 6370 | uschar *expanded = expand_string_internal(sub, FALSE, NULL, skipping, TRUE, &resetok); |
059ec3d9 PH |
6371 | if (expanded == NULL) |
6372 | { | |
6373 | expand_string_message = | |
6374 | string_sprintf("internal expansion of \"%s\" failed: %s", sub, | |
6375 | expand_string_message); | |
6376 | goto EXPAND_FAILED; | |
6377 | } | |
acec9514 | 6378 | yield = string_cat(yield, expanded); |
059ec3d9 PH |
6379 | continue; |
6380 | } | |
6381 | ||
6382 | case EOP_LC: | |
6383 | { | |
6384 | int count = 0; | |
6385 | uschar *t = sub - 1; | |
6386 | while (*(++t) != 0) { *t = tolower(*t); count++; } | |
acec9514 | 6387 | yield = string_catn(yield, sub, count); |
059ec3d9 PH |
6388 | continue; |
6389 | } | |
6390 | ||
6391 | case EOP_UC: | |
6392 | { | |
6393 | int count = 0; | |
6394 | uschar *t = sub - 1; | |
6395 | while (*(++t) != 0) { *t = toupper(*t); count++; } | |
acec9514 | 6396 | yield = string_catn(yield, sub, count); |
059ec3d9 PH |
6397 | continue; |
6398 | } | |
6399 | ||
6400 | case EOP_MD5: | |
80c974f8 | 6401 | #ifdef SUPPORT_TLS |
6a8a60e0 JH |
6402 | if (vp && *(void **)vp->value) |
6403 | { | |
6404 | uschar * cp = tls_cert_fprt_md5(*(void **)vp->value); | |
acec9514 | 6405 | yield = string_cat(yield, cp); |
6a8a60e0 JH |
6406 | } |
6407 | else | |
80c974f8 | 6408 | #endif |
6a8a60e0 JH |
6409 | { |
6410 | md5 base; | |
6411 | uschar digest[16]; | |
6412 | int j; | |
6413 | char st[33]; | |
6414 | md5_start(&base); | |
6415 | md5_end(&base, sub, Ustrlen(sub), digest); | |
6416 | for(j = 0; j < 16; j++) sprintf(st+2*j, "%02x", digest[j]); | |
acec9514 | 6417 | yield = string_cat(yield, US st); |
6a8a60e0 | 6418 | } |
059ec3d9 | 6419 | continue; |
059ec3d9 PH |
6420 | |
6421 | case EOP_SHA1: | |
80c974f8 | 6422 | #ifdef SUPPORT_TLS |
6a8a60e0 JH |
6423 | if (vp && *(void **)vp->value) |
6424 | { | |
6425 | uschar * cp = tls_cert_fprt_sha1(*(void **)vp->value); | |
acec9514 | 6426 | yield = string_cat(yield, cp); |
6a8a60e0 JH |
6427 | } |
6428 | else | |
80c974f8 | 6429 | #endif |
6a8a60e0 | 6430 | { |
5fb822fc | 6431 | hctx h; |
6a8a60e0 JH |
6432 | uschar digest[20]; |
6433 | int j; | |
6434 | char st[41]; | |
5fb822fc JH |
6435 | sha1_start(&h); |
6436 | sha1_end(&h, sub, Ustrlen(sub), digest); | |
6a8a60e0 | 6437 | for(j = 0; j < 20; j++) sprintf(st+2*j, "%02X", digest[j]); |
acec9514 | 6438 | yield = string_catn(yield, US st, 40); |
6a8a60e0 | 6439 | } |
059ec3d9 | 6440 | continue; |
059ec3d9 | 6441 | |
9ef9101c | 6442 | case EOP_SHA256: |
6e773413 | 6443 | #ifdef EXIM_HAVE_SHA2 |
9ef9101c JH |
6444 | if (vp && *(void **)vp->value) |
6445 | { | |
6446 | uschar * cp = tls_cert_fprt_sha256(*(void **)vp->value); | |
acec9514 | 6447 | yield = string_cat(yield, cp); |
9ef9101c JH |
6448 | } |
6449 | else | |
cfab9d68 JH |
6450 | { |
6451 | hctx h; | |
6452 | blob b; | |
6453 | char st[3]; | |
6454 | ||
d73e45df | 6455 | if (!exim_sha_init(&h, HASH_SHA2_256)) |
7b83389d JH |
6456 | { |
6457 | expand_string_message = US"unrecognised sha256 variant"; | |
6458 | goto EXPAND_FAILED; | |
6459 | } | |
cfab9d68 JH |
6460 | exim_sha_update(&h, sub, Ustrlen(sub)); |
6461 | exim_sha_finish(&h, &b); | |
6462 | while (b.len-- > 0) | |
6463 | { | |
6464 | sprintf(st, "%02X", *b.data++); | |
acec9514 | 6465 | yield = string_catn(yield, US st, 2); |
cfab9d68 JH |
6466 | } |
6467 | } | |
6468 | #else | |
6469 | expand_string_message = US"sha256 only supported with TLS"; | |
9ef9101c | 6470 | #endif |
9ef9101c JH |
6471 | continue; |
6472 | ||
6e773413 JH |
6473 | case EOP_SHA3: |
6474 | #ifdef EXIM_HAVE_SHA3 | |
6475 | { | |
6476 | hctx h; | |
6477 | blob b; | |
6478 | char st[3]; | |
6479 | hashmethod m = !arg ? HASH_SHA3_256 | |
6480 | : Ustrcmp(arg, "224") == 0 ? HASH_SHA3_224 | |
6481 | : Ustrcmp(arg, "256") == 0 ? HASH_SHA3_256 | |
6482 | : Ustrcmp(arg, "384") == 0 ? HASH_SHA3_384 | |
6483 | : Ustrcmp(arg, "512") == 0 ? HASH_SHA3_512 | |
6484 | : HASH_BADTYPE; | |
6485 | ||
7b83389d | 6486 | if (m == HASH_BADTYPE || !exim_sha_init(&h, m)) |
6e773413 JH |
6487 | { |
6488 | expand_string_message = US"unrecognised sha3 variant"; | |
6489 | goto EXPAND_FAILED; | |
6490 | } | |
6491 | ||
6e773413 JH |
6492 | exim_sha_update(&h, sub, Ustrlen(sub)); |
6493 | exim_sha_finish(&h, &b); | |
6494 | while (b.len-- > 0) | |
6495 | { | |
6496 | sprintf(st, "%02X", *b.data++); | |
acec9514 | 6497 | yield = string_catn(yield, US st, 2); |
6e773413 JH |
6498 | } |
6499 | } | |
6500 | continue; | |
6501 | #else | |
9c29c48f | 6502 | expand_string_message = US"sha3 only supported with GnuTLS 3.5.0 + or OpenSSL 1.1.1 +"; |
6e773413 JH |
6503 | goto EXPAND_FAILED; |
6504 | #endif | |
6505 | ||
059ec3d9 PH |
6506 | /* Convert hex encoding to base64 encoding */ |
6507 | ||
6508 | case EOP_HEX2B64: | |
6509 | { | |
6510 | int c = 0; | |
6511 | int b = -1; | |
6512 | uschar *in = sub; | |
6513 | uschar *out = sub; | |
6514 | uschar *enc; | |
6515 | ||
6516 | for (enc = sub; *enc != 0; enc++) | |
6517 | { | |
6518 | if (!isxdigit(*enc)) | |
6519 | { | |
6520 | expand_string_message = string_sprintf("\"%s\" is not a hex " | |
6521 | "string", sub); | |
6522 | goto EXPAND_FAILED; | |
6523 | } | |
6524 | c++; | |
6525 | } | |
6526 | ||
6527 | if ((c & 1) != 0) | |
6528 | { | |
6529 | expand_string_message = string_sprintf("\"%s\" contains an odd " | |
6530 | "number of characters", sub); | |
6531 | goto EXPAND_FAILED; | |
6532 | } | |
6533 | ||
6534 | while ((c = *in++) != 0) | |
6535 | { | |
6536 | if (isdigit(c)) c -= '0'; | |
6537 | else c = toupper(c) - 'A' + 10; | |
6538 | if (b == -1) | |
6539 | { | |
6540 | b = c << 4; | |
6541 | } | |
6542 | else | |
6543 | { | |
6544 | *out++ = b | c; | |
6545 | b = -1; | |
6546 | } | |
6547 | } | |
6548 | ||
f4d091fb | 6549 | enc = b64encode(sub, out - sub); |
acec9514 | 6550 | yield = string_cat(yield, enc); |
059ec3d9 PH |
6551 | continue; |
6552 | } | |
6553 | ||
c393f931 TF |
6554 | /* Convert octets outside 0x21..0x7E to \xXX form */ |
6555 | ||
6556 | case EOP_HEXQUOTE: | |
6557 | { | |
6558 | uschar *t = sub - 1; | |
6559 | while (*(++t) != 0) | |
6560 | { | |
6561 | if (*t < 0x21 || 0x7E < *t) | |
acec9514 | 6562 | yield = string_catn(yield, string_sprintf("\\x%02x", *t), 4); |
c393f931 | 6563 | else |
acec9514 | 6564 | yield = string_catn(yield, t, 1); |
c393f931 TF |
6565 | } |
6566 | continue; | |
6567 | } | |
6568 | ||
a64a3dfa JH |
6569 | /* count the number of list elements */ |
6570 | ||
6571 | case EOP_LISTCOUNT: | |
6572 | { | |
6573 | int cnt = 0; | |
6574 | int sep = 0; | |
6575 | uschar * cp; | |
6576 | uschar buffer[256]; | |
6577 | ||
55414b25 | 6578 | while (string_nextinlist(CUSS &sub, &sep, buffer, sizeof(buffer)) != NULL) cnt++; |
a64a3dfa | 6579 | cp = string_sprintf("%d", cnt); |
acec9514 | 6580 | yield = string_cat(yield, cp); |
a64a3dfa JH |
6581 | continue; |
6582 | } | |
6583 | ||
042eb971 | 6584 | /* expand a named list given the name */ |
a64a3dfa | 6585 | /* handles nested named lists; requotes as colon-sep list */ |
042eb971 | 6586 | |
a64a3dfa | 6587 | case EOP_LISTNAMED: |
042eb971 JH |
6588 | { |
6589 | tree_node *t = NULL; | |
55414b25 | 6590 | const uschar * list; |
042eb971 JH |
6591 | int sep = 0; |
6592 | uschar * item; | |
6d9cfc47 | 6593 | uschar * suffix = US""; |
042eb971 JH |
6594 | BOOL needsep = FALSE; |
6595 | uschar buffer[256]; | |
6596 | ||
6597 | if (*sub == '+') sub++; | |
6598 | if (arg == NULL) /* no-argument version */ | |
6599 | { | |
6600 | if (!(t = tree_search(addresslist_anchor, sub)) && | |
6601 | !(t = tree_search(domainlist_anchor, sub)) && | |
6602 | !(t = tree_search(hostlist_anchor, sub))) | |
6603 | t = tree_search(localpartlist_anchor, sub); | |
6604 | } | |
6605 | else switch(*arg) /* specific list-type version */ | |
6606 | { | |
6d9cfc47 JH |
6607 | case 'a': t = tree_search(addresslist_anchor, sub); suffix = US"_a"; break; |
6608 | case 'd': t = tree_search(domainlist_anchor, sub); suffix = US"_d"; break; | |
6609 | case 'h': t = tree_search(hostlist_anchor, sub); suffix = US"_h"; break; | |
6610 | case 'l': t = tree_search(localpartlist_anchor, sub); suffix = US"_l"; break; | |
042eb971 JH |
6611 | default: |
6612 | expand_string_message = string_sprintf("bad suffix on \"list\" operator"); | |
6613 | goto EXPAND_FAILED; | |
6614 | } | |
6615 | ||
6616 | if(!t) | |
6617 | { | |
6618 | expand_string_message = string_sprintf("\"%s\" is not a %snamed list", | |
6619 | sub, !arg?"" | |
6620 | : *arg=='a'?"address " | |
6621 | : *arg=='d'?"domain " | |
6622 | : *arg=='h'?"host " | |
6623 | : *arg=='l'?"localpart " | |
6624 | : 0); | |
6625 | goto EXPAND_FAILED; | |
6626 | } | |
6627 | ||
042eb971 JH |
6628 | list = ((namedlist_block *)(t->data.ptr))->string; |
6629 | ||
acec9514 | 6630 | while ((item = string_nextinlist(&list, &sep, buffer, sizeof(buffer)))) |
042eb971 JH |
6631 | { |
6632 | uschar * buf = US" : "; | |
6633 | if (needsep) | |
acec9514 | 6634 | yield = string_catn(yield, buf, 3); |
042eb971 JH |
6635 | else |
6636 | needsep = TRUE; | |
6637 | ||
6638 | if (*item == '+') /* list item is itself a named list */ | |
6639 | { | |
a64a3dfa | 6640 | uschar * sub = string_sprintf("${listnamed%s:%s}", suffix, item); |
b0e85a8f | 6641 | item = expand_string_internal(sub, FALSE, NULL, FALSE, TRUE, &resetok); |
042eb971 JH |
6642 | } |
6643 | else if (sep != ':') /* item from non-colon-sep list, re-quote for colon list-separator */ | |
6644 | { | |
6645 | char * cp; | |
6646 | char tok[3]; | |
6647 | tok[0] = sep; tok[1] = ':'; tok[2] = 0; | |
5903c6ff | 6648 | while ((cp= strpbrk(CCS item, tok))) |
042eb971 | 6649 | { |
acec9514 | 6650 | yield = string_catn(yield, item, cp - CS item); |
042eb971 JH |
6651 | if (*cp++ == ':') /* colon in a non-colon-sep list item, needs doubling */ |
6652 | { | |
acec9514 | 6653 | yield = string_catn(yield, US"::", 2); |
5903c6ff | 6654 | item = US cp; |
042eb971 JH |
6655 | } |
6656 | else /* sep in item; should already be doubled; emit once */ | |
6657 | { | |
acec9514 | 6658 | yield = string_catn(yield, US tok, 1); |
042eb971 | 6659 | if (*cp == sep) cp++; |
5903c6ff | 6660 | item = US cp; |
042eb971 JH |
6661 | } |
6662 | } | |
6663 | } | |
acec9514 | 6664 | yield = string_cat(yield, item); |
042eb971 JH |
6665 | } |
6666 | continue; | |
6667 | } | |
6668 | ||
059ec3d9 PH |
6669 | /* mask applies a mask to an IP address; for example the result of |
6670 | ${mask:131.111.10.206/28} is 131.111.10.192/28. */ | |
6671 | ||
6672 | case EOP_MASK: | |
6673 | { | |
6674 | int count; | |
6675 | uschar *endptr; | |
6676 | int binary[4]; | |
6677 | int mask, maskoffset; | |
6678 | int type = string_is_ip_address(sub, &maskoffset); | |
6679 | uschar buffer[64]; | |
6680 | ||
6681 | if (type == 0) | |
6682 | { | |
6683 | expand_string_message = string_sprintf("\"%s\" is not an IP address", | |
6684 | sub); | |
6685 | goto EXPAND_FAILED; | |
6686 | } | |
6687 | ||
6688 | if (maskoffset == 0) | |
6689 | { | |
6690 | expand_string_message = string_sprintf("missing mask value in \"%s\"", | |
6691 | sub); | |
6692 | goto EXPAND_FAILED; | |
6693 | } | |
6694 | ||
6695 | mask = Ustrtol(sub + maskoffset + 1, &endptr, 10); | |
6696 | ||
6697 | if (*endptr != 0 || mask < 0 || mask > ((type == 4)? 32 : 128)) | |
6698 | { | |
6699 | expand_string_message = string_sprintf("mask value too big in \"%s\"", | |
6700 | sub); | |
6701 | goto EXPAND_FAILED; | |
6702 | } | |
6703 | ||
6704 | /* Convert the address to binary integer(s) and apply the mask */ | |
6705 | ||
6706 | sub[maskoffset] = 0; | |
6707 | count = host_aton(sub, binary); | |
6708 | host_mask(count, binary, mask); | |
6709 | ||
6710 | /* Convert to masked textual format and add to output. */ | |
6711 | ||
acec9514 | 6712 | yield = string_catn(yield, buffer, |
6f0c9a4f | 6713 | host_nmtoa(count, binary, mask, buffer, '.')); |
059ec3d9 PH |
6714 | continue; |
6715 | } | |
6716 | ||
fc4a7f70 JH |
6717 | case EOP_IPV6NORM: |
6718 | case EOP_IPV6DENORM: | |
6719 | { | |
6720 | int type = string_is_ip_address(sub, NULL); | |
6721 | int binary[4]; | |
6722 | uschar buffer[44]; | |
6723 | ||
6724 | switch (type) | |
6725 | { | |
6726 | case 6: | |
6727 | (void) host_aton(sub, binary); | |
6728 | break; | |
6729 | ||
6730 | case 4: /* convert to IPv4-mapped IPv6 */ | |
6731 | binary[0] = binary[1] = 0; | |
6732 | binary[2] = 0x0000ffff; | |
6733 | (void) host_aton(sub, binary+3); | |
6734 | break; | |
6735 | ||
6736 | case 0: | |
6737 | expand_string_message = | |
6738 | string_sprintf("\"%s\" is not an IP address", sub); | |
6739 | goto EXPAND_FAILED; | |
6740 | } | |
6741 | ||
acec9514 | 6742 | yield = string_catn(yield, buffer, c == EOP_IPV6NORM |
fc4a7f70 JH |
6743 | ? ipv6_nmtoa(binary, buffer) |
6744 | : host_nmtoa(4, binary, -1, buffer, ':') | |
6745 | ); | |
6746 | continue; | |
6747 | } | |
6748 | ||
059ec3d9 PH |
6749 | case EOP_ADDRESS: |
6750 | case EOP_LOCAL_PART: | |
6751 | case EOP_DOMAIN: | |
6752 | { | |
2c0f3ea1 | 6753 | uschar * error; |
059ec3d9 | 6754 | int start, end, domain; |
2c0f3ea1 | 6755 | uschar * t = parse_extract_address(sub, &error, &start, &end, &domain, |
059ec3d9 | 6756 | FALSE); |
2c0f3ea1 | 6757 | if (t) |
059ec3d9 PH |
6758 | if (c != EOP_DOMAIN) |
6759 | { | |
6760 | if (c == EOP_LOCAL_PART && domain != 0) end = start + domain - 1; | |
acec9514 | 6761 | yield = string_catn(yield, sub+start, end-start); |
059ec3d9 PH |
6762 | } |
6763 | else if (domain != 0) | |
6764 | { | |
6765 | domain += start; | |
acec9514 | 6766 | yield = string_catn(yield, sub+domain, end-domain); |
059ec3d9 | 6767 | } |
059ec3d9 PH |
6768 | continue; |
6769 | } | |
6770 | ||
29f89cad PH |
6771 | case EOP_ADDRESSES: |
6772 | { | |
6773 | uschar outsep[2] = { ':', '\0' }; | |
6774 | uschar *address, *error; | |
acec9514 | 6775 | int save_ptr = yield->ptr; |
29f89cad PH |
6776 | int start, end, domain; /* Not really used */ |
6777 | ||
6778 | while (isspace(*sub)) sub++; | |
1b7cf216 HSHR |
6779 | if (*sub == '>') |
6780 | if (*outsep = *++sub) ++sub; | |
5bfe3b35 JH |
6781 | else |
6782 | { | |
1b7cf216 HSHR |
6783 | expand_string_message = string_sprintf("output separator " |
6784 | "missing in expanding ${addresses:%s}", --sub); | |
6785 | goto EXPAND_FAILED; | |
5bfe3b35 | 6786 | } |
29f89cad PH |
6787 | parse_allow_group = TRUE; |
6788 | ||
6789 | for (;;) | |
6790 | { | |
6791 | uschar *p = parse_find_address_end(sub, FALSE); | |
6792 | uschar saveend = *p; | |
6793 | *p = '\0'; | |
6794 | address = parse_extract_address(sub, &error, &start, &end, &domain, | |
6795 | FALSE); | |
6796 | *p = saveend; | |
6797 | ||
6798 | /* Add the address to the output list that we are building. This is | |
6799 | done in chunks by searching for the separator character. At the | |
6800 | start, unless we are dealing with the first address of the output | |
6801 | list, add in a space if the new address begins with the separator | |
6802 | character, or is an empty string. */ | |
6803 | ||
6804 | if (address != NULL) | |
6805 | { | |
acec9514 JH |
6806 | if (yield->ptr != save_ptr && address[0] == *outsep) |
6807 | yield = string_catn(yield, US" ", 1); | |
29f89cad PH |
6808 | |
6809 | for (;;) | |
6810 | { | |
6811 | size_t seglen = Ustrcspn(address, outsep); | |
acec9514 | 6812 | yield = string_catn(yield, address, seglen + 1); |
29f89cad PH |
6813 | |
6814 | /* If we got to the end of the string we output one character | |
6815 | too many. */ | |
6816 | ||
acec9514 JH |
6817 | if (address[seglen] == '\0') { yield->ptr--; break; } |
6818 | yield = string_catn(yield, outsep, 1); | |
29f89cad PH |
6819 | address += seglen + 1; |
6820 | } | |
6821 | ||
6822 | /* Output a separator after the string: we will remove the | |
6823 | redundant final one at the end. */ | |
6824 | ||
acec9514 | 6825 | yield = string_catn(yield, outsep, 1); |
29f89cad PH |
6826 | } |
6827 | ||
6828 | if (saveend == '\0') break; | |
6829 | sub = p + 1; | |
6830 | } | |
6831 | ||
6832 | /* If we have generated anything, remove the redundant final | |
6833 | separator. */ | |
6834 | ||
acec9514 | 6835 | if (yield->ptr != save_ptr) yield->ptr--; |
29f89cad PH |
6836 | parse_allow_group = FALSE; |
6837 | continue; | |
6838 | } | |
6839 | ||
6840 | ||
059ec3d9 PH |
6841 | /* quote puts a string in quotes if it is empty or contains anything |
6842 | other than alphamerics, underscore, dot, or hyphen. | |
6843 | ||
6844 | quote_local_part puts a string in quotes if RFC 2821/2822 requires it to | |
6845 | be quoted in order to be a valid local part. | |
6846 | ||
6847 | In both cases, newlines and carriage returns are converted into \n and \r | |
6848 | respectively */ | |
6849 | ||
6850 | case EOP_QUOTE: | |
6851 | case EOP_QUOTE_LOCAL_PART: | |
6852 | if (arg == NULL) | |
6853 | { | |
6854 | BOOL needs_quote = (*sub == 0); /* TRUE for empty string */ | |
6855 | uschar *t = sub - 1; | |
6856 | ||
6857 | if (c == EOP_QUOTE) | |
6858 | { | |
6859 | while (!needs_quote && *(++t) != 0) | |
6860 | needs_quote = !isalnum(*t) && !strchr("_-.", *t); | |
6861 | } | |
6862 | else /* EOP_QUOTE_LOCAL_PART */ | |
6863 | { | |
6864 | while (!needs_quote && *(++t) != 0) | |
6865 | needs_quote = !isalnum(*t) && | |
6866 | strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL && | |
6867 | (*t != '.' || t == sub || t[1] == 0); | |
6868 | } | |
6869 | ||
6870 | if (needs_quote) | |
6871 | { | |
acec9514 | 6872 | yield = string_catn(yield, US"\"", 1); |
059ec3d9 PH |
6873 | t = sub - 1; |
6874 | while (*(++t) != 0) | |
6875 | { | |
6876 | if (*t == '\n') | |
acec9514 | 6877 | yield = string_catn(yield, US"\\n", 2); |
059ec3d9 | 6878 | else if (*t == '\r') |
acec9514 | 6879 | yield = string_catn(yield, US"\\r", 2); |
059ec3d9 PH |
6880 | else |
6881 | { | |
6882 | if (*t == '\\' || *t == '"') | |
acec9514 JH |
6883 | yield = string_catn(yield, US"\\", 1); |
6884 | yield = string_catn(yield, t, 1); | |
059ec3d9 PH |
6885 | } |
6886 | } | |
acec9514 | 6887 | yield = string_catn(yield, US"\"", 1); |
059ec3d9 | 6888 | } |
acec9514 | 6889 | else yield = string_cat(yield, sub); |
059ec3d9 PH |
6890 | continue; |
6891 | } | |
6892 | ||
6893 | /* quote_lookuptype does lookup-specific quoting */ | |
6894 | ||
6895 | else | |
6896 | { | |
6897 | int n; | |
6898 | uschar *opt = Ustrchr(arg, '_'); | |
6899 | ||
6900 | if (opt != NULL) *opt++ = 0; | |
6901 | ||
6902 | n = search_findtype(arg, Ustrlen(arg)); | |
6903 | if (n < 0) | |
6904 | { | |
6905 | expand_string_message = search_error_message; | |
6906 | goto EXPAND_FAILED; | |
6907 | } | |
6908 | ||
e6d225ae DW |
6909 | if (lookup_list[n]->quote != NULL) |
6910 | sub = (lookup_list[n]->quote)(sub, opt); | |
059ec3d9 PH |
6911 | else if (opt != NULL) sub = NULL; |
6912 | ||
6913 | if (sub == NULL) | |
6914 | { | |
6915 | expand_string_message = string_sprintf( | |
6916 | "\"%s\" unrecognized after \"${quote_%s\"", | |
6917 | opt, arg); | |
6918 | goto EXPAND_FAILED; | |
6919 | } | |
6920 | ||
acec9514 | 6921 | yield = string_cat(yield, sub); |
059ec3d9 PH |
6922 | continue; |
6923 | } | |
6924 | ||
6925 | /* rx quote sticks in \ before any non-alphameric character so that | |
6926 | the insertion works in a regular expression. */ | |
6927 | ||
6928 | case EOP_RXQUOTE: | |
6929 | { | |
6930 | uschar *t = sub - 1; | |
6931 | while (*(++t) != 0) | |
6932 | { | |
6933 | if (!isalnum(*t)) | |
acec9514 JH |
6934 | yield = string_catn(yield, US"\\", 1); |
6935 | yield = string_catn(yield, t, 1); | |
059ec3d9 PH |
6936 | } |
6937 | continue; | |
6938 | } | |
6939 | ||
6940 | /* RFC 2047 encodes, assuming headers_charset (default ISO 8859-1) as | |
6941 | prescribed by the RFC, if there are characters that need to be encoded */ | |
6942 | ||
6943 | case EOP_RFC2047: | |
6944 | { | |
14702f5b | 6945 | uschar buffer[2048]; |
55414b25 | 6946 | const uschar *string = parse_quote_2047(sub, Ustrlen(sub), headers_charset, |
46218253 | 6947 | buffer, sizeof(buffer), FALSE); |
acec9514 | 6948 | yield = string_cat(yield, string); |
059ec3d9 PH |
6949 | continue; |
6950 | } | |
6951 | ||
9c57cbc0 PH |
6952 | /* RFC 2047 decode */ |
6953 | ||
6954 | case EOP_RFC2047D: | |
6955 | { | |
6956 | int len; | |
6957 | uschar *error; | |
6958 | uschar *decoded = rfc2047_decode(sub, check_rfc2047_length, | |
6959 | headers_charset, '?', &len, &error); | |
6960 | if (error != NULL) | |
6961 | { | |
6962 | expand_string_message = error; | |
6963 | goto EXPAND_FAILED; | |
6964 | } | |
acec9514 | 6965 | yield = string_catn(yield, decoded, len); |
9c57cbc0 PH |
6966 | continue; |
6967 | } | |
6968 | ||
059ec3d9 PH |
6969 | /* from_utf8 converts UTF-8 to 8859-1, turning non-existent chars into |
6970 | underscores */ | |
6971 | ||
6972 | case EOP_FROM_UTF8: | |
6973 | { | |
6974 | while (*sub != 0) | |
6975 | { | |
6976 | int c; | |
6977 | uschar buff[4]; | |
6978 | GETUTF8INC(c, sub); | |
6979 | if (c > 255) c = '_'; | |
6980 | buff[0] = c; | |
acec9514 | 6981 | yield = string_catn(yield, buff, 1); |
059ec3d9 PH |
6982 | } |
6983 | continue; | |
6984 | } | |
6985 | ||
b9c2e32f | 6986 | /* replace illegal UTF-8 sequences by replacement character */ |
94431adb | 6987 | |
b9c2e32f AR |
6988 | #define UTF8_REPLACEMENT_CHAR US"?" |
6989 | ||
6990 | case EOP_UTF8CLEAN: | |
6991 | { | |
85098ee7 | 6992 | int seq_len = 0, index = 0; |
e3dd1d67 | 6993 | int bytes_left = 0; |
e8e86723 | 6994 | long codepoint = -1; |
b9c2e32f | 6995 | uschar seq_buff[4]; /* accumulate utf-8 here */ |
94431adb | 6996 | |
b9c2e32f AR |
6997 | while (*sub != 0) |
6998 | { | |
e8e86723 JH |
6999 | int complete = 0; |
7000 | uschar c = *sub++; | |
b9c2e32f | 7001 | |
e3dd1d67 | 7002 | if (bytes_left) |
b9c2e32f AR |
7003 | { |
7004 | if ((c & 0xc0) != 0x80) | |
b9c2e32f AR |
7005 | /* wrong continuation byte; invalidate all bytes */ |
7006 | complete = 1; /* error */ | |
b9c2e32f AR |
7007 | else |
7008 | { | |
7009 | codepoint = (codepoint << 6) | (c & 0x3f); | |
7010 | seq_buff[index++] = c; | |
7011 | if (--bytes_left == 0) /* codepoint complete */ | |
b9c2e32f | 7012 | if(codepoint > 0x10FFFF) /* is it too large? */ |
e8e86723 | 7013 | complete = -1; /* error (RFC3629 limit) */ |
b9c2e32f AR |
7014 | else |
7015 | { /* finished; output utf-8 sequence */ | |
acec9514 | 7016 | yield = string_catn(yield, seq_buff, seq_len); |
b9c2e32f AR |
7017 | index = 0; |
7018 | } | |
b9c2e32f AR |
7019 | } |
7020 | } | |
7021 | else /* no bytes left: new sequence */ | |
7022 | { | |
7023 | if((c & 0x80) == 0) /* 1-byte sequence, US-ASCII, keep it */ | |
7024 | { | |
acec9514 | 7025 | yield = string_catn(yield, &c, 1); |
b9c2e32f AR |
7026 | continue; |
7027 | } | |
7028 | if((c & 0xe0) == 0xc0) /* 2-byte sequence */ | |
7029 | { | |
10cc8a1e AR |
7030 | if(c == 0xc0 || c == 0xc1) /* 0xc0 and 0xc1 are illegal */ |
7031 | complete = -1; | |
7032 | else | |
7033 | { | |
7034 | bytes_left = 1; | |
7035 | codepoint = c & 0x1f; | |
7036 | } | |
b9c2e32f AR |
7037 | } |
7038 | else if((c & 0xf0) == 0xe0) /* 3-byte sequence */ | |
7039 | { | |
7040 | bytes_left = 2; | |
7041 | codepoint = c & 0x0f; | |
7042 | } | |
7043 | else if((c & 0xf8) == 0xf0) /* 4-byte sequence */ | |
7044 | { | |
7045 | bytes_left = 3; | |
7046 | codepoint = c & 0x07; | |
7047 | } | |
7048 | else /* invalid or too long (RFC3629 allows only 4 bytes) */ | |
7049 | complete = -1; | |
7050 | ||
7051 | seq_buff[index++] = c; | |
7052 | seq_len = bytes_left + 1; | |
7053 | } /* if(bytes_left) */ | |
7054 | ||
7055 | if (complete != 0) | |
7056 | { | |
7057 | bytes_left = index = 0; | |
acec9514 | 7058 | yield = string_catn(yield, UTF8_REPLACEMENT_CHAR, 1); |
b9c2e32f AR |
7059 | } |
7060 | if ((complete == 1) && ((c & 0x80) == 0)) | |
4e08fd50 | 7061 | /* ASCII character follows incomplete sequence */ |
acec9514 | 7062 | yield = string_catn(yield, &c, 1); |
b9c2e32f AR |
7063 | } |
7064 | continue; | |
7065 | } | |
7066 | ||
8c5d388a | 7067 | #ifdef SUPPORT_I18N |
4e08fd50 JH |
7068 | case EOP_UTF8_DOMAIN_TO_ALABEL: |
7069 | { | |
7070 | uschar * error = NULL; | |
7071 | uschar * s = string_domain_utf8_to_alabel(sub, &error); | |
7072 | if (error) | |
7073 | { | |
7074 | expand_string_message = string_sprintf( | |
7075 | "error converting utf8 (%s) to alabel: %s", | |
7076 | string_printing(sub), error); | |
7077 | goto EXPAND_FAILED; | |
7078 | } | |
acec9514 | 7079 | yield = string_cat(yield, s); |
4e08fd50 JH |
7080 | continue; |
7081 | } | |
7082 | ||
7083 | case EOP_UTF8_DOMAIN_FROM_ALABEL: | |
7084 | { | |
7085 | uschar * error = NULL; | |
7086 | uschar * s = string_domain_alabel_to_utf8(sub, &error); | |
7087 | if (error) | |
7088 | { | |
7089 | expand_string_message = string_sprintf( | |
7090 | "error converting alabel (%s) to utf8: %s", | |
7091 | string_printing(sub), error); | |
7092 | goto EXPAND_FAILED; | |
7093 | } | |
acec9514 | 7094 | yield = string_cat(yield, s); |
4e08fd50 JH |
7095 | continue; |
7096 | } | |
7097 | ||
7098 | case EOP_UTF8_LOCALPART_TO_ALABEL: | |
7099 | { | |
7100 | uschar * error = NULL; | |
7101 | uschar * s = string_localpart_utf8_to_alabel(sub, &error); | |
7102 | if (error) | |
7103 | { | |
7104 | expand_string_message = string_sprintf( | |
7105 | "error converting utf8 (%s) to alabel: %s", | |
7106 | string_printing(sub), error); | |
7107 | goto EXPAND_FAILED; | |
7108 | } | |
acec9514 JH |
7109 | yield = string_cat(yield, s); |
7110 | DEBUG(D_expand) debug_printf_indent("yield: '%s'\n", yield->s); | |
4e08fd50 JH |
7111 | continue; |
7112 | } | |
7113 | ||
7114 | case EOP_UTF8_LOCALPART_FROM_ALABEL: | |
7115 | { | |
7116 | uschar * error = NULL; | |
7117 | uschar * s = string_localpart_alabel_to_utf8(sub, &error); | |
7118 | if (error) | |
7119 | { | |
7120 | expand_string_message = string_sprintf( | |
7121 | "error converting alabel (%s) to utf8: %s", | |
7122 | string_printing(sub), error); | |
7123 | goto EXPAND_FAILED; | |
7124 | } | |
acec9514 | 7125 | yield = string_cat(yield, s); |
4e08fd50 JH |
7126 | continue; |
7127 | } | |
7128 | #endif /* EXPERIMENTAL_INTERNATIONAL */ | |
7129 | ||
059ec3d9 PH |
7130 | /* escape turns all non-printing characters into escape sequences. */ |
7131 | ||
7132 | case EOP_ESCAPE: | |
7133 | { | |
3367f8c2 | 7134 | const uschar * t = string_printing(sub); |
acec9514 | 7135 | yield = string_cat(yield, t); |
059ec3d9 PH |
7136 | continue; |
7137 | } | |
7138 | ||
3367f8c2 JH |
7139 | case EOP_ESCAPE8BIT: |
7140 | { | |
7141 | const uschar * s = sub; | |
7142 | uschar c; | |
7143 | ||
4dc2379a | 7144 | for (s = sub; (c = *s); s++) |
3367f8c2 | 7145 | yield = c < 127 && c != '\\' |
acec9514 JH |
7146 | ? string_catn(yield, s, 1) |
7147 | : string_catn(yield, string_sprintf("\\%03o", c), 4); | |
3367f8c2 JH |
7148 | continue; |
7149 | } | |
7150 | ||
059ec3d9 PH |
7151 | /* Handle numeric expression evaluation */ |
7152 | ||
7153 | case EOP_EVAL: | |
7154 | case EOP_EVAL10: | |
7155 | { | |
7156 | uschar *save_sub = sub; | |
7157 | uschar *error = NULL; | |
97d17305 | 7158 | int_eximarith_t n = eval_expr(&sub, (c == EOP_EVAL10), &error, FALSE); |
059ec3d9 PH |
7159 | if (error != NULL) |
7160 | { | |
7161 | expand_string_message = string_sprintf("error in expression " | |
bb07bcd3 JH |
7162 | "evaluation: %s (after processing \"%.*s\")", error, |
7163 | (int)(sub-save_sub), save_sub); | |
059ec3d9 PH |
7164 | goto EXPAND_FAILED; |
7165 | } | |
97d17305 | 7166 | sprintf(CS var_buffer, PR_EXIM_ARITH, n); |
acec9514 | 7167 | yield = string_cat(yield, var_buffer); |
059ec3d9 PH |
7168 | continue; |
7169 | } | |
7170 | ||
7171 | /* Handle time period formating */ | |
7172 | ||
f90d018c PH |
7173 | case EOP_TIME_EVAL: |
7174 | { | |
7175 | int n = readconf_readtime(sub, 0, FALSE); | |
7176 | if (n < 0) | |
7177 | { | |
7178 | expand_string_message = string_sprintf("string \"%s\" is not an " | |
7179 | "Exim time interval in \"%s\" operator", sub, name); | |
7180 | goto EXPAND_FAILED; | |
7181 | } | |
7182 | sprintf(CS var_buffer, "%d", n); | |
acec9514 | 7183 | yield = string_cat(yield, var_buffer); |
f90d018c PH |
7184 | continue; |
7185 | } | |
7186 | ||
059ec3d9 PH |
7187 | case EOP_TIME_INTERVAL: |
7188 | { | |
7189 | int n; | |
7190 | uschar *t = read_number(&n, sub); | |
7191 | if (*t != 0) /* Not A Number*/ | |
7192 | { | |
7193 | expand_string_message = string_sprintf("string \"%s\" is not a " | |
7194 | "positive number in \"%s\" operator", sub, name); | |
7195 | goto EXPAND_FAILED; | |
7196 | } | |
7197 | t = readconf_printtime(n); | |
acec9514 | 7198 | yield = string_cat(yield, t); |
059ec3d9 PH |
7199 | continue; |
7200 | } | |
7201 | ||
7202 | /* Convert string to base64 encoding */ | |
7203 | ||
7204 | case EOP_STR2B64: | |
9aa35e9c | 7205 | case EOP_BASE64: |
59b87190 | 7206 | { |
b81207d2 | 7207 | #ifdef SUPPORT_TLS |
59b87190 JH |
7208 | uschar * s = vp && *(void **)vp->value |
7209 | ? tls_cert_der_b64(*(void **)vp->value) | |
7210 | : b64encode(sub, Ustrlen(sub)); | |
b81207d2 JH |
7211 | #else |
7212 | uschar * s = b64encode(sub, Ustrlen(sub)); | |
7213 | #endif | |
acec9514 | 7214 | yield = string_cat(yield, s); |
59b87190 JH |
7215 | continue; |
7216 | } | |
059ec3d9 | 7217 | |
9aa35e9c JH |
7218 | case EOP_BASE64D: |
7219 | { | |
59b87190 | 7220 | uschar * s; |
9aa35e9c JH |
7221 | int len = b64decode(sub, &s); |
7222 | if (len < 0) | |
7223 | { | |
7224 | expand_string_message = string_sprintf("string \"%s\" is not " | |
7225 | "well-formed for \"%s\" operator", sub, name); | |
7226 | goto EXPAND_FAILED; | |
7227 | } | |
acec9514 | 7228 | yield = string_cat(yield, s); |
9aa35e9c JH |
7229 | continue; |
7230 | } | |
7231 | ||
059ec3d9 PH |
7232 | /* strlen returns the length of the string */ |
7233 | ||
7234 | case EOP_STRLEN: | |
7235 | { | |
7236 | uschar buff[24]; | |
7237 | (void)sprintf(CS buff, "%d", Ustrlen(sub)); | |
acec9514 | 7238 | yield = string_cat(yield, buff); |
059ec3d9 PH |
7239 | continue; |
7240 | } | |
7241 | ||
7242 | /* length_n or l_n takes just the first n characters or the whole string, | |
7243 | whichever is the shorter; | |
7244 | ||
7245 | substr_m_n, and s_m_n take n characters from offset m; negative m take | |
7246 | from the end; l_n is synonymous with s_0_n. If n is omitted in substr it | |
7247 | takes the rest, either to the right or to the left. | |
7248 | ||
7249 | hash_n or h_n makes a hash of length n from the string, yielding n | |
7250 | characters from the set a-z; hash_n_m makes a hash of length n, but | |
7251 | uses m characters from the set a-zA-Z0-9. | |
7252 | ||
7253 | nhash_n returns a single number between 0 and n-1 (in text form), while | |
7254 | nhash_n_m returns a div/mod hash as two numbers "a/b". The first lies | |
7255 | between 0 and n-1 and the second between 0 and m-1. */ | |
7256 | ||
7257 | case EOP_LENGTH: | |
7258 | case EOP_L: | |
7259 | case EOP_SUBSTR: | |
7260 | case EOP_S: | |
7261 | case EOP_HASH: | |
7262 | case EOP_H: | |
7263 | case EOP_NHASH: | |
7264 | case EOP_NH: | |
7265 | { | |
7266 | int sign = 1; | |
7267 | int value1 = 0; | |
7268 | int value2 = -1; | |
7269 | int *pn; | |
7270 | int len; | |
7271 | uschar *ret; | |
7272 | ||
7273 | if (arg == NULL) | |
7274 | { | |
7275 | expand_string_message = string_sprintf("missing values after %s", | |
7276 | name); | |
7277 | goto EXPAND_FAILED; | |
7278 | } | |
7279 | ||
7280 | /* "length" has only one argument, effectively being synonymous with | |
7281 | substr_0_n. */ | |
7282 | ||
7283 | if (c == EOP_LENGTH || c == EOP_L) | |
7284 | { | |
7285 | pn = &value2; | |
7286 | value2 = 0; | |
7287 | } | |
7288 | ||
7289 | /* The others have one or two arguments; for "substr" the first may be | |
7290 | negative. The second being negative means "not supplied". */ | |
7291 | ||
7292 | else | |
7293 | { | |
7294 | pn = &value1; | |
7295 | if (name[0] == 's' && *arg == '-') { sign = -1; arg++; } | |
7296 | } | |
7297 | ||
7298 | /* Read up to two numbers, separated by underscores */ | |
7299 | ||
7300 | ret = arg; | |
7301 | while (*arg != 0) | |
7302 | { | |
7303 | if (arg != ret && *arg == '_' && pn == &value1) | |
7304 | { | |
7305 | pn = &value2; | |
7306 | value2 = 0; | |
7307 | if (arg[1] != 0) arg++; | |
7308 | } | |
7309 | else if (!isdigit(*arg)) | |
7310 | { | |
7311 | expand_string_message = | |
7312 | string_sprintf("non-digit after underscore in \"%s\"", name); | |
7313 | goto EXPAND_FAILED; | |
7314 | } | |
7315 | else *pn = (*pn)*10 + *arg++ - '0'; | |
7316 | } | |
7317 | value1 *= sign; | |
7318 | ||
7319 | /* Perform the required operation */ | |
7320 | ||
7321 | ret = | |
7322 | (c == EOP_HASH || c == EOP_H)? | |
7323 | compute_hash(sub, value1, value2, &len) : | |
7324 | (c == EOP_NHASH || c == EOP_NH)? | |
7325 | compute_nhash(sub, value1, value2, &len) : | |
7326 | extract_substr(sub, value1, value2, &len); | |
7327 | ||
7328 | if (ret == NULL) goto EXPAND_FAILED; | |
acec9514 | 7329 | yield = string_catn(yield, ret, len); |
059ec3d9 PH |
7330 | continue; |
7331 | } | |
7332 | ||
7333 | /* Stat a path */ | |
7334 | ||
7335 | case EOP_STAT: | |
7336 | { | |
7337 | uschar *s; | |
7338 | uschar smode[12]; | |
7339 | uschar **modetable[3]; | |
7340 | int i; | |
7341 | mode_t mode; | |
7342 | struct stat st; | |
7343 | ||
254e032f PH |
7344 | if ((expand_forbid & RDO_EXISTS) != 0) |
7345 | { | |
7346 | expand_string_message = US"Use of the stat() expansion is not permitted"; | |
7347 | goto EXPAND_FAILED; | |
7348 | } | |
7349 | ||
059ec3d9 PH |
7350 | if (stat(CS sub, &st) < 0) |
7351 | { | |
7352 | expand_string_message = string_sprintf("stat(%s) failed: %s", | |
7353 | sub, strerror(errno)); | |
7354 | goto EXPAND_FAILED; | |
7355 | } | |
7356 | mode = st.st_mode; | |
7357 | switch (mode & S_IFMT) | |
7358 | { | |
7359 | case S_IFIFO: smode[0] = 'p'; break; | |
7360 | case S_IFCHR: smode[0] = 'c'; break; | |
7361 | case S_IFDIR: smode[0] = 'd'; break; | |
7362 | case S_IFBLK: smode[0] = 'b'; break; | |
7363 | case S_IFREG: smode[0] = '-'; break; | |
7364 | default: smode[0] = '?'; break; | |
7365 | } | |
7366 | ||
7367 | modetable[0] = ((mode & 01000) == 0)? mtable_normal : mtable_sticky; | |
7368 | modetable[1] = ((mode & 02000) == 0)? mtable_normal : mtable_setid; | |
7369 | modetable[2] = ((mode & 04000) == 0)? mtable_normal : mtable_setid; | |
7370 | ||
7371 | for (i = 0; i < 3; i++) | |
7372 | { | |
7373 | memcpy(CS(smode + 7 - i*3), CS(modetable[i][mode & 7]), 3); | |
7374 | mode >>= 3; | |
7375 | } | |
7376 | ||
7377 | smode[10] = 0; | |
7378 | s = string_sprintf("mode=%04lo smode=%s inode=%ld device=%ld links=%ld " | |
b1c749bb | 7379 | "uid=%ld gid=%ld size=" OFF_T_FMT " atime=%ld mtime=%ld ctime=%ld", |
059ec3d9 PH |
7380 | (long)(st.st_mode & 077777), smode, (long)st.st_ino, |
7381 | (long)st.st_dev, (long)st.st_nlink, (long)st.st_uid, | |
b1c749bb | 7382 | (long)st.st_gid, st.st_size, (long)st.st_atime, |
059ec3d9 | 7383 | (long)st.st_mtime, (long)st.st_ctime); |
acec9514 | 7384 | yield = string_cat(yield, s); |
059ec3d9 PH |
7385 | continue; |
7386 | } | |
7387 | ||
17c76198 | 7388 | /* vaguely random number less than N */ |
9e3331ea TK |
7389 | |
7390 | case EOP_RANDINT: | |
7391 | { | |
97d17305 | 7392 | int_eximarith_t max; |
9e3331ea TK |
7393 | uschar *s; |
7394 | ||
7685ce68 | 7395 | max = expanded_string_integer(sub, TRUE); |
9e3331ea TK |
7396 | if (expand_string_message != NULL) |
7397 | goto EXPAND_FAILED; | |
17c76198 | 7398 | s = string_sprintf("%d", vaguely_random_number((int)max)); |
acec9514 | 7399 | yield = string_cat(yield, s); |
9e3331ea TK |
7400 | continue; |
7401 | } | |
7402 | ||
83e029d5 PP |
7403 | /* Reverse IP, including IPv6 to dotted-nibble */ |
7404 | ||
7405 | case EOP_REVERSE_IP: | |
7406 | { | |
7407 | int family, maskptr; | |
7408 | uschar reversed[128]; | |
7409 | ||
7410 | family = string_is_ip_address(sub, &maskptr); | |
7411 | if (family == 0) | |
7412 | { | |
7413 | expand_string_message = string_sprintf( | |
7414 | "reverse_ip() not given an IP address [%s]", sub); | |
7415 | goto EXPAND_FAILED; | |
7416 | } | |
7417 | invert_address(reversed, sub); | |
acec9514 | 7418 | yield = string_cat(yield, reversed); |
83e029d5 PP |
7419 | continue; |
7420 | } | |
7421 | ||
059ec3d9 PH |
7422 | /* Unknown operator */ |
7423 | ||
7424 | default: | |
7425 | expand_string_message = | |
7426 | string_sprintf("unknown expansion operator \"%s\"", name); | |
7427 | goto EXPAND_FAILED; | |
7428 | } | |
7429 | } | |
7430 | ||
7431 | /* Handle a plain name. If this is the first thing in the expansion, release | |
7432 | the pre-allocated buffer. If the result data is known to be in a new buffer, | |
7433 | newsize will be set to the size of that buffer, and we can just point at that | |
7434 | store instead of copying. Many expansion strings contain just one reference, | |
7435 | so this is a useful optimization, especially for humungous headers | |
7436 | ($message_headers). */ | |
2e23003a | 7437 | /*{*/ |
059ec3d9 PH |
7438 | if (*s++ == '}') |
7439 | { | |
7440 | int len; | |
7441 | int newsize = 0; | |
bb07bcd3 | 7442 | gstring * g = NULL; |
acec9514 | 7443 | |
bb07bcd3 JH |
7444 | if (!yield) |
7445 | g = store_get(sizeof(gstring)); | |
7446 | else if (yield->ptr == 0) | |
059ec3d9 | 7447 | { |
d6b4d938 | 7448 | if (resetok) store_reset(yield); |
059ec3d9 | 7449 | yield = NULL; |
bb07bcd3 | 7450 | g = store_get(sizeof(gstring)); /* alloc _before_ calling find_variable() */ |
059ec3d9 | 7451 | } |
8487aee9 | 7452 | if (!(value = find_variable(name, FALSE, skipping, &newsize))) |
059ec3d9 PH |
7453 | { |
7454 | expand_string_message = | |
7455 | string_sprintf("unknown variable in \"${%s}\"", name); | |
641cb756 | 7456 | check_variable_error_message(name); |
059ec3d9 PH |
7457 | goto EXPAND_FAILED; |
7458 | } | |
7459 | len = Ustrlen(value); | |
8487aee9 | 7460 | if (!yield && newsize) |
059ec3d9 | 7461 | { |
acec9514 JH |
7462 | yield = g; |
7463 | yield->size = newsize; | |
7464 | yield->ptr = len; | |
7465 | yield->s = value; | |
059ec3d9 | 7466 | } |
8487aee9 | 7467 | else |
acec9514 | 7468 | yield = string_catn(yield, value, len); |
059ec3d9 PH |
7469 | continue; |
7470 | } | |
7471 | ||
7472 | /* Else there's something wrong */ | |
7473 | ||
7474 | expand_string_message = | |
7475 | string_sprintf("\"${%s\" is not a known operator (or a } is missing " | |
7476 | "in a variable reference)", name); | |
7477 | goto EXPAND_FAILED; | |
7478 | } | |
7479 | ||
7480 | /* If we hit the end of the string when ket_ends is set, there is a missing | |
7481 | terminating brace. */ | |
7482 | ||
7483 | if (ket_ends && *s == 0) | |
7484 | { | |
7485 | expand_string_message = malformed_header? | |
7486 | US"missing } at end of string - could be header name not terminated by colon" | |
7487 | : | |
7488 | US"missing } at end of string"; | |
7489 | goto EXPAND_FAILED; | |
7490 | } | |
7491 | ||
7492 | /* Expansion succeeded; yield may still be NULL here if nothing was actually | |
7493 | added to the string. If so, set up an empty string. Add a terminating zero. If | |
7494 | left != NULL, return a pointer to the terminator. */ | |
7495 | ||
acec9514 JH |
7496 | if (!yield) |
7497 | yield = string_get(1); | |
7498 | (void) string_from_gstring(yield); | |
7499 | if (left) *left = s; | |
059ec3d9 PH |
7500 | |
7501 | /* Any stacking store that was used above the final string is no longer needed. | |
7502 | In many cases the final string will be the first one that was got and so there | |
7503 | will be optimal store usage. */ | |
7504 | ||
acec9514 | 7505 | if (resetok) store_reset(yield->s + (yield->size = yield->ptr + 1)); |
b0e85a8f JH |
7506 | else if (resetok_p) *resetok_p = FALSE; |
7507 | ||
059ec3d9 PH |
7508 | DEBUG(D_expand) |
7509 | { | |
1b37ac39 JH |
7510 | debug_printf_indent(UTF8_VERT_RIGHT UTF8_HORIZ UTF8_HORIZ |
7511 | "expanding: %.*s\n", | |
7512 | (int)(s - string), string); | |
7513 | debug_printf_indent("%s" | |
7514 | UTF8_HORIZ UTF8_HORIZ UTF8_HORIZ UTF8_HORIZ UTF8_HORIZ | |
7515 | "result: %s\n", | |
7516 | skipping ? UTF8_VERT_RIGHT : UTF8_UP_RIGHT, | |
acec9514 | 7517 | yield->s); |
1b37ac39 JH |
7518 | if (skipping) |
7519 | debug_printf_indent(UTF8_UP_RIGHT UTF8_HORIZ UTF8_HORIZ UTF8_HORIZ | |
7520 | "skipping: result is not used\n"); | |
059ec3d9 | 7521 | } |
e1d04f48 | 7522 | expand_level--; |
acec9514 | 7523 | return yield->s; |
059ec3d9 PH |
7524 | |
7525 | /* This is the failure exit: easiest to program with a goto. We still need | |
7526 | to update the pointer to the terminator, for cases of nested calls with "fail". | |
7527 | */ | |
7528 | ||
7529 | EXPAND_FAILED_CURLY: | |
e47376be JH |
7530 | if (malformed_header) |
7531 | expand_string_message = | |
7532 | US"missing or misplaced { or } - could be header name not terminated by colon"; | |
7533 | ||
7534 | else if (!expand_string_message || !*expand_string_message) | |
7535 | expand_string_message = US"missing or misplaced { or }"; | |
059ec3d9 PH |
7536 | |
7537 | /* At one point, Exim reset the store to yield (if yield was not NULL), but | |
7538 | that is a bad idea, because expand_string_message is in dynamic store. */ | |
7539 | ||
7540 | EXPAND_FAILED: | |
acec9514 | 7541 | if (left) *left = s; |
059ec3d9 PH |
7542 | DEBUG(D_expand) |
7543 | { | |
1b37ac39 JH |
7544 | debug_printf_indent(UTF8_VERT_RIGHT "failed to expand: %s\n", |
7545 | string); | |
7546 | debug_printf_indent("%s" UTF8_HORIZ UTF8_HORIZ UTF8_HORIZ | |
7547 | "error message: %s\n", | |
7548 | expand_string_forcedfail ? UTF8_VERT_RIGHT : UTF8_UP_RIGHT, | |
7549 | expand_string_message); | |
7550 | if (expand_string_forcedfail) | |
7551 | debug_printf_indent(UTF8_UP_RIGHT "failure was forced\n"); | |
059ec3d9 | 7552 | } |
ce93c6d8 | 7553 | if (resetok_p && !resetok) *resetok_p = FALSE; |
e1d04f48 | 7554 | expand_level--; |
059ec3d9 PH |
7555 | return NULL; |
7556 | } | |
7557 | ||
7558 | ||
7559 | /* This is the external function call. Do a quick check for any expansion | |
7560 | metacharacters, and if there are none, just return the input string. | |
7561 | ||
7562 | Argument: the string to be expanded | |
7563 | Returns: the expanded string, or NULL if expansion failed; if failure was | |
7564 | due to a lookup deferring, search_find_defer will be TRUE | |
7565 | */ | |
7566 | ||
ce93c6d8 JH |
7567 | const uschar * |
7568 | expand_cstring(const uschar * string) | |
059ec3d9 | 7569 | { |
ce93c6d8 JH |
7570 | if (Ustrpbrk(string, "$\\") != NULL) |
7571 | { | |
7572 | int old_pool = store_pool; | |
7573 | uschar * s; | |
7574 | ||
7575 | search_find_defer = FALSE; | |
7576 | malformed_header = FALSE; | |
7577 | store_pool = POOL_MAIN; | |
7578 | s = expand_string_internal(string, FALSE, NULL, FALSE, TRUE, NULL); | |
7579 | store_pool = old_pool; | |
7580 | return s; | |
7581 | } | |
7582 | return string; | |
059ec3d9 PH |
7583 | } |
7584 | ||
7585 | ||
ce93c6d8 JH |
7586 | uschar * |
7587 | expand_string(uschar * string) | |
55414b25 | 7588 | { |
ce93c6d8 | 7589 | return US expand_cstring(CUS string); |
55414b25 JH |
7590 | } |
7591 | ||
7592 | ||
7593 | ||
ce93c6d8 JH |
7594 | |
7595 | ||
059ec3d9 PH |
7596 | /************************************************* |
7597 | * Expand and copy * | |
7598 | *************************************************/ | |
7599 | ||
7600 | /* Now and again we want to expand a string and be sure that the result is in a | |
7601 | new bit of store. This function does that. | |
55414b25 | 7602 | Since we know it has been copied, the de-const cast is safe. |
059ec3d9 PH |
7603 | |
7604 | Argument: the string to be expanded | |
7605 | Returns: the expanded string, always in a new bit of store, or NULL | |
7606 | */ | |
7607 | ||
7608 | uschar * | |
55414b25 | 7609 | expand_string_copy(const uschar *string) |
059ec3d9 | 7610 | { |
55414b25 | 7611 | const uschar *yield = expand_cstring(string); |
059ec3d9 | 7612 | if (yield == string) yield = string_copy(string); |
55414b25 | 7613 | return US yield; |
059ec3d9 PH |
7614 | } |
7615 | ||
7616 | ||
7617 | ||
7618 | /************************************************* | |
7619 | * Expand and interpret as an integer * | |
7620 | *************************************************/ | |
7621 | ||
7622 | /* Expand a string, and convert the result into an integer. | |
7623 | ||
d45b1de8 PH |
7624 | Arguments: |
7625 | string the string to be expanded | |
7626 | isplus TRUE if a non-negative number is expected | |
059ec3d9 PH |
7627 | |
7628 | Returns: the integer value, or | |
7629 | -1 for an expansion error ) in both cases, message in | |
7630 | -2 for an integer interpretation error ) expand_string_message | |
d45b1de8 | 7631 | expand_string_message is set NULL for an OK integer |
059ec3d9 PH |
7632 | */ |
7633 | ||
97d17305 | 7634 | int_eximarith_t |
d45b1de8 | 7635 | expand_string_integer(uschar *string, BOOL isplus) |
059ec3d9 | 7636 | { |
7685ce68 TF |
7637 | return expanded_string_integer(expand_string(string), isplus); |
7638 | } | |
7639 | ||
7640 | ||
7641 | /************************************************* | |
7642 | * Interpret string as an integer * | |
7643 | *************************************************/ | |
7644 | ||
7645 | /* Convert a string (that has already been expanded) into an integer. | |
7646 | ||
7647 | This function is used inside the expansion code. | |
7648 | ||
7649 | Arguments: | |
7650 | s the string to be expanded | |
7651 | isplus TRUE if a non-negative number is expected | |
7652 | ||
7653 | Returns: the integer value, or | |
7654 | -1 if string is NULL (which implies an expansion error) | |
7655 | -2 for an integer interpretation error | |
7656 | expand_string_message is set NULL for an OK integer | |
7657 | */ | |
7658 | ||
7659 | static int_eximarith_t | |
55414b25 | 7660 | expanded_string_integer(const uschar *s, BOOL isplus) |
7685ce68 | 7661 | { |
97d17305 | 7662 | int_eximarith_t value; |
059ec3d9 PH |
7663 | uschar *msg = US"invalid integer \"%s\""; |
7664 | uschar *endptr; | |
7665 | ||
d45b1de8 PH |
7666 | /* If expansion failed, expand_string_message will be set. */ |
7667 | ||
059ec3d9 PH |
7668 | if (s == NULL) return -1; |
7669 | ||
7670 | /* On an overflow, strtol() returns LONG_MAX or LONG_MIN, and sets errno | |
7671 | to ERANGE. When there isn't an overflow, errno is not changed, at least on some | |
7672 | systems, so we set it zero ourselves. */ | |
7673 | ||
7674 | errno = 0; | |
d45b1de8 | 7675 | expand_string_message = NULL; /* Indicates no error */ |
b52bc06e NM |
7676 | |
7677 | /* Before Exim 4.64, strings consisting entirely of whitespace compared | |
7678 | equal to 0. Unfortunately, people actually relied upon that, so preserve | |
7679 | the behaviour explicitly. Stripping leading whitespace is a harmless | |
7680 | noop change since strtol skips it anyway (provided that there is a number | |
7681 | to find at all). */ | |
7682 | if (isspace(*s)) | |
7683 | { | |
7684 | while (isspace(*s)) ++s; | |
7685 | if (*s == '\0') | |
7686 | { | |
7687 | DEBUG(D_expand) | |
e1d04f48 | 7688 | debug_printf_indent("treating blank string as number 0\n"); |
b52bc06e NM |
7689 | return 0; |
7690 | } | |
7691 | } | |
7692 | ||
aa7c82b2 | 7693 | value = strtoll(CS s, CSS &endptr, 10); |
059ec3d9 PH |
7694 | |
7695 | if (endptr == s) | |
7696 | { | |
7697 | msg = US"integer expected but \"%s\" found"; | |
7698 | } | |
d45b1de8 PH |
7699 | else if (value < 0 && isplus) |
7700 | { | |
7701 | msg = US"non-negative integer expected but \"%s\" found"; | |
7702 | } | |
059ec3d9 PH |
7703 | else |
7704 | { | |
4eb9d6ef | 7705 | switch (tolower(*endptr)) |
059ec3d9 | 7706 | { |
4eb9d6ef JH |
7707 | default: |
7708 | break; | |
7709 | case 'k': | |
4328fd3c | 7710 | if (value > EXIM_ARITH_MAX/1024 || value < EXIM_ARITH_MIN/1024) errno = ERANGE; |
aa7c82b2 | 7711 | else value *= 1024; |
4eb9d6ef JH |
7712 | endptr++; |
7713 | break; | |
7714 | case 'm': | |
4328fd3c | 7715 | if (value > EXIM_ARITH_MAX/(1024*1024) || value < EXIM_ARITH_MIN/(1024*1024)) errno = ERANGE; |
4eb9d6ef JH |
7716 | else value *= 1024*1024; |
7717 | endptr++; | |
7718 | break; | |
7719 | case 'g': | |
4328fd3c | 7720 | if (value > EXIM_ARITH_MAX/(1024*1024*1024) || value < EXIM_ARITH_MIN/(1024*1024*1024)) errno = ERANGE; |
4eb9d6ef JH |
7721 | else value *= 1024*1024*1024; |
7722 | endptr++; | |
7723 | break; | |
059ec3d9 PH |
7724 | } |
7725 | if (errno == ERANGE) | |
7726 | msg = US"absolute value of integer \"%s\" is too large (overflow)"; | |
7727 | else | |
7728 | { | |
7729 | while (isspace(*endptr)) endptr++; | |
725735cd | 7730 | if (*endptr == 0) return value; |
059ec3d9 PH |
7731 | } |
7732 | } | |
7733 | ||
7734 | expand_string_message = string_sprintf(CS msg, s); | |
7735 | return -2; | |
7736 | } | |
7737 | ||
059ec3d9 | 7738 | |
9c695f6d JH |
7739 | /* These values are usually fixed boolean values, but they are permitted to be |
7740 | expanded strings. | |
7741 | ||
7742 | Arguments: | |
7743 | addr address being routed | |
7744 | mtype the module type | |
7745 | mname the module name | |
7746 | dbg_opt debug selectors | |
7747 | oname the option name | |
7748 | bvalue the router's boolean value | |
7749 | svalue the router's string value | |
7750 | rvalue where to put the returned value | |
7751 | ||
7752 | Returns: OK value placed in rvalue | |
7753 | DEFER expansion failed | |
7754 | */ | |
7755 | ||
7756 | int | |
7757 | exp_bool(address_item *addr, | |
7758 | uschar *mtype, uschar *mname, unsigned dbg_opt, | |
7759 | uschar *oname, BOOL bvalue, | |
7760 | uschar *svalue, BOOL *rvalue) | |
7761 | { | |
7762 | uschar *expanded; | |
7763 | if (svalue == NULL) { *rvalue = bvalue; return OK; } | |
7764 | ||
7765 | expanded = expand_string(svalue); | |
7766 | if (expanded == NULL) | |
7767 | { | |
7768 | if (expand_string_forcedfail) | |
7769 | { | |
7770 | DEBUG(dbg_opt) debug_printf("expansion of \"%s\" forced failure\n", oname); | |
7771 | *rvalue = bvalue; | |
7772 | return OK; | |
7773 | } | |
7774 | addr->message = string_sprintf("failed to expand \"%s\" in %s %s: %s", | |
7775 | oname, mname, mtype, expand_string_message); | |
7776 | DEBUG(dbg_opt) debug_printf("%s\n", addr->message); | |
7777 | return DEFER; | |
7778 | } | |
7779 | ||
7780 | DEBUG(dbg_opt) debug_printf("expansion of \"%s\" yields \"%s\"\n", oname, | |
7781 | expanded); | |
7782 | ||
7783 | if (strcmpic(expanded, US"true") == 0 || strcmpic(expanded, US"yes") == 0) | |
7784 | *rvalue = TRUE; | |
7785 | else if (strcmpic(expanded, US"false") == 0 || strcmpic(expanded, US"no") == 0) | |
7786 | *rvalue = FALSE; | |
7787 | else | |
7788 | { | |
7789 | addr->message = string_sprintf("\"%s\" is not a valid value for the " | |
7790 | "\"%s\" option in the %s %s", expanded, oname, mname, mtype); | |
7791 | return DEFER; | |
7792 | } | |
7793 | ||
7794 | return OK; | |
7795 | } | |
7796 | ||
7797 | ||
7798 | ||
f42deca9 JH |
7799 | /* Avoid potentially exposing a password in a string about to be logged */ |
7800 | ||
7801 | uschar * | |
7802 | expand_hide_passwords(uschar * s) | |
7803 | { | |
7804 | return ( ( Ustrstr(s, "failed to expand") != NULL | |
7805 | || Ustrstr(s, "expansion of ") != NULL | |
7806 | ) | |
7807 | && ( Ustrstr(s, "mysql") != NULL | |
7808 | || Ustrstr(s, "pgsql") != NULL | |
7809 | || Ustrstr(s, "redis") != NULL | |
7810 | || Ustrstr(s, "sqlite") != NULL | |
7811 | || Ustrstr(s, "ldap:") != NULL | |
7812 | || Ustrstr(s, "ldaps:") != NULL | |
7813 | || Ustrstr(s, "ldapi:") != NULL | |
7814 | || Ustrstr(s, "ldapdn:") != NULL | |
7815 | || Ustrstr(s, "ldapm:") != NULL | |
7816 | ) ) | |
7817 | ? US"Temporary internal error" : s; | |
7818 | } | |
7819 | ||
7820 | ||
7821 | ||
cf0812d5 JH |
7822 | /************************************************* |
7823 | * Error-checking for testsuite * | |
7824 | *************************************************/ | |
7825 | typedef struct { | |
cf0812d5 JH |
7826 | uschar * region_start; |
7827 | uschar * region_end; | |
7828 | const uschar *var_name; | |
90341c71 | 7829 | const uschar *var_data; |
cf0812d5 JH |
7830 | } err_ctx; |
7831 | ||
7832 | static void | |
7833 | assert_variable_notin(uschar * var_name, uschar * var_data, void * ctx) | |
7834 | { | |
7835 | err_ctx * e = ctx; | |
7836 | if (var_data >= e->region_start && var_data < e->region_end) | |
90341c71 | 7837 | { |
cf0812d5 | 7838 | e->var_name = CUS var_name; |
90341c71 JH |
7839 | e->var_data = CUS var_data; |
7840 | } | |
cf0812d5 JH |
7841 | } |
7842 | ||
7843 | void | |
7844 | assert_no_variables(void * ptr, int len, const char * filename, int linenumber) | |
7845 | { | |
ce93c6d8 JH |
7846 | err_ctx e = { .region_start = ptr, .region_end = US ptr + len, |
7847 | .var_name = NULL, .var_data = NULL }; | |
cf0812d5 JH |
7848 | int i; |
7849 | var_entry * v; | |
7850 | ||
7851 | /* check acl_ variables */ | |
7852 | tree_walk(acl_var_c, assert_variable_notin, &e); | |
7853 | tree_walk(acl_var_m, assert_variable_notin, &e); | |
7854 | ||
7855 | /* check auth<n> variables */ | |
7856 | for (i = 0; i < AUTH_VARS; i++) if (auth_vars[i]) | |
7857 | assert_variable_notin(US"auth<n>", auth_vars[i], &e); | |
7858 | ||
7859 | /* check regex<n> variables */ | |
7860 | for (i = 0; i < REGEX_VARS; i++) if (regex_vars[i]) | |
7861 | assert_variable_notin(US"regex<n>", regex_vars[i], &e); | |
7862 | ||
7863 | /* check known-name variables */ | |
7864 | for (v = var_table; v < var_table + var_table_size; v++) | |
7865 | if (v->type == vtype_stringptr) | |
7866 | assert_variable_notin(US v->name, *(USS v->value), &e); | |
7867 | ||
ce93c6d8 JH |
7868 | /* check dns and address trees */ |
7869 | tree_walk(tree_dns_fails, assert_variable_notin, &e); | |
7870 | tree_walk(tree_duplicates, assert_variable_notin, &e); | |
7871 | tree_walk(tree_nonrecipients, assert_variable_notin, &e); | |
7872 | tree_walk(tree_unusable, assert_variable_notin, &e); | |
7873 | ||
cf0812d5 | 7874 | if (e.var_name) |
90341c71 JH |
7875 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
7876 | "live variable '%s' destroyed by reset_store at %s:%d\n- value '%.64s'", | |
ce93c6d8 | 7877 | e.var_name, filename, linenumber, e.var_data); |
cf0812d5 JH |
7878 | } |
7879 | ||
7880 | ||
9c695f6d | 7881 | |
059ec3d9 PH |
7882 | /************************************************* |
7883 | ************************************************** | |
7884 | * Stand-alone test program * | |
7885 | ************************************************** | |
7886 | *************************************************/ | |
7887 | ||
7888 | #ifdef STAND_ALONE | |
7889 | ||
7890 | ||
7891 | BOOL | |
7892 | regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup) | |
7893 | { | |
7894 | int ovector[3*(EXPAND_MAXN+1)]; | |
7895 | int n = pcre_exec(re, NULL, subject, Ustrlen(subject), 0, PCRE_EOPT|options, | |
0539a19d | 7896 | ovector, nelem(ovector)); |
059ec3d9 PH |
7897 | BOOL yield = n >= 0; |
7898 | if (n == 0) n = EXPAND_MAXN + 1; | |
7899 | if (yield) | |
7900 | { | |
7901 | int nn; | |
7902 | expand_nmax = (setup < 0)? 0 : setup + 1; | |
7903 | for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2) | |
7904 | { | |
7905 | expand_nstring[expand_nmax] = subject + ovector[nn]; | |
7906 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; | |
7907 | } | |
7908 | expand_nmax--; | |
7909 | } | |
7910 | return yield; | |
7911 | } | |
7912 | ||
7913 | ||
7914 | int main(int argc, uschar **argv) | |
7915 | { | |
7916 | int i; | |
7917 | uschar buffer[1024]; | |
7918 | ||
7919 | debug_selector = D_v; | |
7920 | debug_file = stderr; | |
7921 | debug_fd = fileno(debug_file); | |
7922 | big_buffer = malloc(big_buffer_size); | |
7923 | ||
7924 | for (i = 1; i < argc; i++) | |
7925 | { | |
7926 | if (argv[i][0] == '+') | |
7927 | { | |
7928 | debug_trace_memory = 2; | |
7929 | argv[i]++; | |
7930 | } | |
7931 | if (isdigit(argv[i][0])) | |
7932 | debug_selector = Ustrtol(argv[i], NULL, 0); | |
7933 | else | |
7934 | if (Ustrspn(argv[i], "abcdefghijklmnopqrtsuvwxyz0123456789-.:/") == | |
7935 | Ustrlen(argv[i])) | |
7936 | { | |
de78e2d5 | 7937 | #ifdef LOOKUP_LDAP |
059ec3d9 | 7938 | eldap_default_servers = argv[i]; |
de78e2d5 JH |
7939 | #endif |
7940 | #ifdef LOOKUP_MYSQL | |
059ec3d9 | 7941 | mysql_servers = argv[i]; |
de78e2d5 JH |
7942 | #endif |
7943 | #ifdef LOOKUP_PGSQL | |
059ec3d9 | 7944 | pgsql_servers = argv[i]; |
de78e2d5 JH |
7945 | #endif |
7946 | #ifdef LOOKUP_REDIS | |
9bdd29ad | 7947 | redis_servers = argv[i]; |
de78e2d5 | 7948 | #endif |
059ec3d9 | 7949 | } |
de78e2d5 | 7950 | #ifdef EXIM_PERL |
059ec3d9 | 7951 | else opt_perl_startup = argv[i]; |
de78e2d5 | 7952 | #endif |
059ec3d9 PH |
7953 | } |
7954 | ||
7955 | printf("Testing string expansion: debug_level = %d\n\n", debug_level); | |
7956 | ||
7957 | expand_nstring[1] = US"string 1...."; | |
7958 | expand_nlength[1] = 8; | |
7959 | expand_nmax = 1; | |
7960 | ||
7961 | #ifdef EXIM_PERL | |
7962 | if (opt_perl_startup != NULL) | |
7963 | { | |
7964 | uschar *errstr; | |
7965 | printf("Starting Perl interpreter\n"); | |
7966 | errstr = init_perl(opt_perl_startup); | |
7967 | if (errstr != NULL) | |
7968 | { | |
7969 | printf("** error in perl_startup code: %s\n", errstr); | |
7970 | return EXIT_FAILURE; | |
7971 | } | |
7972 | } | |
7973 | #endif /* EXIM_PERL */ | |
7974 | ||
7975 | while (fgets(buffer, sizeof(buffer), stdin) != NULL) | |
7976 | { | |
7977 | void *reset_point = store_get(0); | |
7978 | uschar *yield = expand_string(buffer); | |
7979 | if (yield != NULL) | |
7980 | { | |
7981 | printf("%s\n", yield); | |
7982 | store_reset(reset_point); | |
7983 | } | |
7984 | else | |
7985 | { | |
7986 | if (search_find_defer) printf("search_find deferred\n"); | |
7987 | printf("Failed: %s\n", expand_string_message); | |
7988 | if (expand_string_forcedfail) printf("Forced failure\n"); | |
7989 | printf("\n"); | |
7990 | } | |
7991 | } | |
7992 | ||
7993 | search_tidyup(); | |
7994 | ||
7995 | return 0; | |
7996 | } | |
7997 | ||
7998 | #endif | |
7999 | ||
9e4dddbd | 8000 | /* vi: aw ai sw=2 |
b9c2e32f | 8001 | */ |
059ec3d9 | 8002 | /* End of expand.c */ |