Commit | Line | Data |
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059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
3386088d | 5 | /* Copyright (c) University of Cambridge 1995 - 2015 */ |
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 PH |
19 | #ifdef STAND_ALONE |
20 | #ifndef SUPPORT_CRYPTEQ | |
21 | #define SUPPORT_CRYPTEQ | |
22 | #endif | |
23 | #endif | |
24 | ||
96c065cb PH |
25 | #ifdef LOOKUP_LDAP |
26 | #include "lookups/ldap.h" | |
27 | #endif | |
28 | ||
059ec3d9 PH |
29 | #ifdef SUPPORT_CRYPTEQ |
30 | #ifdef CRYPT_H | |
31 | #include <crypt.h> | |
32 | #endif | |
33 | #ifndef HAVE_CRYPT16 | |
34 | extern char* crypt16(char*, char*); | |
35 | #endif | |
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 | |
49 | block. Charaters after the first 16 are ignored. It always generates | |
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", | |
ed0512a1 JH |
114 | #ifdef EXPERIMENTAL_INTERNATIONAL |
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, | |
ed0512a1 JH |
144 | #ifdef EXPERIMENTAL_INTERNATIONAL |
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 JH |
175 | US"time_interval" |
176 | #ifdef EXPERIMENTAL_INTERNATIONAL | |
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 JH |
190 | EOP_TIME_INTERVAL |
191 | #ifdef EXPERIMENTAL_INTERNATIONAL | |
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", |
059ec3d9 PH |
202 | US"base62", |
203 | US"base62d", | |
204 | US"domain", | |
205 | US"escape", | |
206 | US"eval", | |
207 | US"eval10", | |
208 | US"expand", | |
209 | US"h", | |
210 | US"hash", | |
211 | US"hex2b64", | |
c393f931 | 212 | US"hexquote", |
059ec3d9 PH |
213 | US"l", |
214 | US"lc", | |
215 | US"length", | |
a64a3dfa JH |
216 | US"listcount", |
217 | US"listnamed", | |
059ec3d9 PH |
218 | US"mask", |
219 | US"md5", | |
220 | US"nh", | |
221 | US"nhash", | |
222 | US"quote", | |
9e3331ea | 223 | US"randint", |
059ec3d9 | 224 | US"rfc2047", |
9c57cbc0 | 225 | US"rfc2047d", |
059ec3d9 PH |
226 | US"rxquote", |
227 | US"s", | |
228 | US"sha1", | |
9ef9101c | 229 | US"sha256", |
059ec3d9 PH |
230 | US"stat", |
231 | US"str2b64", | |
232 | US"strlen", | |
233 | US"substr", | |
b9c2e32f AR |
234 | US"uc", |
235 | US"utf8clean" }; | |
059ec3d9 PH |
236 | |
237 | enum { | |
0539a19d | 238 | EOP_ADDRESS = nelem(op_table_underscore), |
29f89cad | 239 | EOP_ADDRESSES, |
059ec3d9 PH |
240 | EOP_BASE62, |
241 | EOP_BASE62D, | |
242 | EOP_DOMAIN, | |
243 | EOP_ESCAPE, | |
244 | EOP_EVAL, | |
245 | EOP_EVAL10, | |
246 | EOP_EXPAND, | |
247 | EOP_H, | |
248 | EOP_HASH, | |
249 | EOP_HEX2B64, | |
c393f931 | 250 | EOP_HEXQUOTE, |
059ec3d9 PH |
251 | EOP_L, |
252 | EOP_LC, | |
253 | EOP_LENGTH, | |
a64a3dfa JH |
254 | EOP_LISTCOUNT, |
255 | EOP_LISTNAMED, | |
059ec3d9 PH |
256 | EOP_MASK, |
257 | EOP_MD5, | |
258 | EOP_NH, | |
259 | EOP_NHASH, | |
260 | EOP_QUOTE, | |
9e3331ea | 261 | EOP_RANDINT, |
059ec3d9 | 262 | EOP_RFC2047, |
9c57cbc0 | 263 | EOP_RFC2047D, |
059ec3d9 PH |
264 | EOP_RXQUOTE, |
265 | EOP_S, | |
266 | EOP_SHA1, | |
9ef9101c | 267 | EOP_SHA256, |
059ec3d9 PH |
268 | EOP_STAT, |
269 | EOP_STR2B64, | |
270 | EOP_STRLEN, | |
271 | EOP_SUBSTR, | |
b9c2e32f AR |
272 | EOP_UC, |
273 | EOP_UTF8CLEAN }; | |
059ec3d9 PH |
274 | |
275 | ||
276 | /* Table of condition names, and corresponding switch numbers. The names must | |
277 | be in alphabetical order. */ | |
278 | ||
279 | static uschar *cond_table[] = { | |
280 | US"<", | |
281 | US"<=", | |
282 | US"=", | |
283 | US"==", /* Backward compatibility */ | |
284 | US">", | |
285 | US">=", | |
333eea9c | 286 | US"acl", |
059ec3d9 | 287 | US"and", |
f3766eb5 | 288 | US"bool", |
6a8de854 | 289 | US"bool_lax", |
059ec3d9 PH |
290 | US"crypteq", |
291 | US"def", | |
292 | US"eq", | |
293 | US"eqi", | |
294 | US"exists", | |
295 | US"first_delivery", | |
0ce9abe6 PH |
296 | US"forall", |
297 | US"forany", | |
059ec3d9 PH |
298 | US"ge", |
299 | US"gei", | |
300 | US"gt", | |
301 | US"gti", | |
76dca828 PP |
302 | US"inlist", |
303 | US"inlisti", | |
059ec3d9 PH |
304 | US"isip", |
305 | US"isip4", | |
306 | US"isip6", | |
307 | US"ldapauth", | |
308 | US"le", | |
309 | US"lei", | |
310 | US"lt", | |
311 | US"lti", | |
312 | US"match", | |
313 | US"match_address", | |
314 | US"match_domain", | |
32d668a5 | 315 | US"match_ip", |
059ec3d9 PH |
316 | US"match_local_part", |
317 | US"or", | |
318 | US"pam", | |
319 | US"pwcheck", | |
320 | US"queue_running", | |
321 | US"radius", | |
322 | US"saslauthd" | |
323 | }; | |
324 | ||
325 | enum { | |
326 | ECOND_NUM_L, | |
327 | ECOND_NUM_LE, | |
328 | ECOND_NUM_E, | |
329 | ECOND_NUM_EE, | |
330 | ECOND_NUM_G, | |
331 | ECOND_NUM_GE, | |
333eea9c | 332 | ECOND_ACL, |
059ec3d9 | 333 | ECOND_AND, |
f3766eb5 | 334 | ECOND_BOOL, |
6a8de854 | 335 | ECOND_BOOL_LAX, |
059ec3d9 PH |
336 | ECOND_CRYPTEQ, |
337 | ECOND_DEF, | |
338 | ECOND_STR_EQ, | |
339 | ECOND_STR_EQI, | |
340 | ECOND_EXISTS, | |
341 | ECOND_FIRST_DELIVERY, | |
0ce9abe6 PH |
342 | ECOND_FORALL, |
343 | ECOND_FORANY, | |
059ec3d9 PH |
344 | ECOND_STR_GE, |
345 | ECOND_STR_GEI, | |
346 | ECOND_STR_GT, | |
347 | ECOND_STR_GTI, | |
76dca828 PP |
348 | ECOND_INLIST, |
349 | ECOND_INLISTI, | |
059ec3d9 PH |
350 | ECOND_ISIP, |
351 | ECOND_ISIP4, | |
352 | ECOND_ISIP6, | |
353 | ECOND_LDAPAUTH, | |
354 | ECOND_STR_LE, | |
355 | ECOND_STR_LEI, | |
356 | ECOND_STR_LT, | |
357 | ECOND_STR_LTI, | |
358 | ECOND_MATCH, | |
359 | ECOND_MATCH_ADDRESS, | |
360 | ECOND_MATCH_DOMAIN, | |
32d668a5 | 361 | ECOND_MATCH_IP, |
059ec3d9 PH |
362 | ECOND_MATCH_LOCAL_PART, |
363 | ECOND_OR, | |
364 | ECOND_PAM, | |
365 | ECOND_PWCHECK, | |
366 | ECOND_QUEUE_RUNNING, | |
367 | ECOND_RADIUS, | |
368 | ECOND_SASLAUTHD | |
369 | }; | |
370 | ||
371 | ||
059ec3d9 PH |
372 | /* Types of table entry */ |
373 | ||
7e75538e | 374 | enum vtypes { |
059ec3d9 PH |
375 | vtype_int, /* value is address of int */ |
376 | vtype_filter_int, /* ditto, but recognized only when filtering */ | |
377 | vtype_ino, /* value is address of ino_t (not always an int) */ | |
378 | vtype_uid, /* value is address of uid_t (not always an int) */ | |
379 | vtype_gid, /* value is address of gid_t (not always an int) */ | |
11d7e4fa | 380 | vtype_bool, /* value is address of bool */ |
059ec3d9 PH |
381 | vtype_stringptr, /* value is address of pointer to string */ |
382 | vtype_msgbody, /* as stringptr, but read when first required */ | |
383 | vtype_msgbody_end, /* ditto, the end of the message */ | |
ff75a1f7 PH |
384 | vtype_msgheaders, /* the message's headers, processed */ |
385 | vtype_msgheaders_raw, /* the message's headers, unprocessed */ | |
059ec3d9 PH |
386 | vtype_localpart, /* extract local part from string */ |
387 | vtype_domain, /* extract domain from string */ | |
362145b5 | 388 | vtype_string_func, /* value is string returned by given function */ |
059ec3d9 PH |
389 | vtype_todbsdin, /* value not used; generate BSD inbox tod */ |
390 | vtype_tode, /* value not used; generate tod in epoch format */ | |
f5787926 | 391 | vtype_todel, /* value not used; generate tod in epoch/usec format */ |
059ec3d9 PH |
392 | vtype_todf, /* value not used; generate full tod */ |
393 | vtype_todl, /* value not used; generate log tod */ | |
394 | vtype_todlf, /* value not used; generate log file datestamp tod */ | |
395 | vtype_todzone, /* value not used; generate time zone only */ | |
396 | vtype_todzulu, /* value not used; generate zulu tod */ | |
397 | vtype_reply, /* value not used; get reply from headers */ | |
398 | vtype_pid, /* value not used; result is pid */ | |
399 | vtype_host_lookup, /* value not used; get host name */ | |
5cb8cbc6 PH |
400 | vtype_load_avg, /* value not used; result is int from os_getloadavg */ |
401 | vtype_pspace, /* partition space; value is T/F for spool/log */ | |
9d1c15ef JH |
402 | vtype_pinodes, /* partition inodes; value is T/F for spool/log */ |
403 | vtype_cert /* SSL certificate */ | |
80a47a2c TK |
404 | #ifndef DISABLE_DKIM |
405 | ,vtype_dkim /* Lookup of value in DKIM signature */ | |
406 | #endif | |
7e75538e JH |
407 | }; |
408 | ||
409 | /* Type for main variable table */ | |
410 | ||
411 | typedef struct { | |
412 | const char *name; | |
413 | enum vtypes type; | |
414 | void *value; | |
415 | } var_entry; | |
416 | ||
417 | /* Type for entries pointing to address/length pairs. Not currently | |
418 | in use. */ | |
419 | ||
420 | typedef struct { | |
421 | uschar **address; | |
422 | int *length; | |
423 | } alblock; | |
059ec3d9 | 424 | |
362145b5 JH |
425 | static uschar * fn_recipients(void); |
426 | ||
059ec3d9 PH |
427 | /* This table must be kept in alphabetical order. */ |
428 | ||
429 | static var_entry var_table[] = { | |
38a0a95f PH |
430 | /* WARNING: Do not invent variables whose names start acl_c or acl_m because |
431 | they will be confused with user-creatable ACL variables. */ | |
525239c1 JH |
432 | { "acl_arg1", vtype_stringptr, &acl_arg[0] }, |
433 | { "acl_arg2", vtype_stringptr, &acl_arg[1] }, | |
434 | { "acl_arg3", vtype_stringptr, &acl_arg[2] }, | |
435 | { "acl_arg4", vtype_stringptr, &acl_arg[3] }, | |
436 | { "acl_arg5", vtype_stringptr, &acl_arg[4] }, | |
437 | { "acl_arg6", vtype_stringptr, &acl_arg[5] }, | |
438 | { "acl_arg7", vtype_stringptr, &acl_arg[6] }, | |
439 | { "acl_arg8", vtype_stringptr, &acl_arg[7] }, | |
440 | { "acl_arg9", vtype_stringptr, &acl_arg[8] }, | |
441 | { "acl_narg", vtype_int, &acl_narg }, | |
059ec3d9 PH |
442 | { "acl_verify_message", vtype_stringptr, &acl_verify_message }, |
443 | { "address_data", vtype_stringptr, &deliver_address_data }, | |
444 | { "address_file", vtype_stringptr, &address_file }, | |
445 | { "address_pipe", vtype_stringptr, &address_pipe }, | |
2d07a215 | 446 | { "authenticated_fail_id",vtype_stringptr, &authenticated_fail_id }, |
059ec3d9 PH |
447 | { "authenticated_id", vtype_stringptr, &authenticated_id }, |
448 | { "authenticated_sender",vtype_stringptr, &authenticated_sender }, | |
449 | { "authentication_failed",vtype_int, &authentication_failed }, | |
9e949f00 PP |
450 | #ifdef WITH_CONTENT_SCAN |
451 | { "av_failed", vtype_int, &av_failed }, | |
452 | #endif | |
8523533c TK |
453 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
454 | { "bmi_alt_location", vtype_stringptr, &bmi_alt_location }, | |
455 | { "bmi_base64_tracker_verdict", vtype_stringptr, &bmi_base64_tracker_verdict }, | |
456 | { "bmi_base64_verdict", vtype_stringptr, &bmi_base64_verdict }, | |
457 | { "bmi_deliver", vtype_int, &bmi_deliver }, | |
458 | #endif | |
059ec3d9 PH |
459 | { "body_linecount", vtype_int, &body_linecount }, |
460 | { "body_zerocount", vtype_int, &body_zerocount }, | |
461 | { "bounce_recipient", vtype_stringptr, &bounce_recipient }, | |
462 | { "bounce_return_size_limit", vtype_int, &bounce_return_size_limit }, | |
463 | { "caller_gid", vtype_gid, &real_gid }, | |
464 | { "caller_uid", vtype_uid, &real_uid }, | |
055e2cb4 | 465 | { "callout_address", vtype_stringptr, &callout_address }, |
059ec3d9 PH |
466 | { "compile_date", vtype_stringptr, &version_date }, |
467 | { "compile_number", vtype_stringptr, &version_cnumber }, | |
98b8312f HSHR |
468 | { "config_dir", vtype_stringptr, &config_main_directory }, |
469 | { "config_file", vtype_stringptr, &config_main_filename }, | |
e5a9dba6 | 470 | { "csa_status", vtype_stringptr, &csa_status }, |
6a8f9482 TK |
471 | #ifdef EXPERIMENTAL_DCC |
472 | { "dcc_header", vtype_stringptr, &dcc_header }, | |
473 | { "dcc_result", vtype_stringptr, &dcc_result }, | |
474 | #endif | |
8523533c TK |
475 | #ifdef WITH_OLD_DEMIME |
476 | { "demime_errorlevel", vtype_int, &demime_errorlevel }, | |
477 | { "demime_reason", vtype_stringptr, &demime_reason }, | |
fb2274d4 | 478 | #endif |
80a47a2c TK |
479 | #ifndef DISABLE_DKIM |
480 | { "dkim_algo", vtype_dkim, (void *)DKIM_ALGO }, | |
481 | { "dkim_bodylength", vtype_dkim, (void *)DKIM_BODYLENGTH }, | |
482 | { "dkim_canon_body", vtype_dkim, (void *)DKIM_CANON_BODY }, | |
483 | { "dkim_canon_headers", vtype_dkim, (void *)DKIM_CANON_HEADERS }, | |
484 | { "dkim_copiedheaders", vtype_dkim, (void *)DKIM_COPIEDHEADERS }, | |
485 | { "dkim_created", vtype_dkim, (void *)DKIM_CREATED }, | |
2df588c9 | 486 | { "dkim_cur_signer", vtype_stringptr, &dkim_cur_signer }, |
e08d09e5 | 487 | { "dkim_domain", vtype_stringptr, &dkim_signing_domain }, |
80a47a2c TK |
488 | { "dkim_expires", vtype_dkim, (void *)DKIM_EXPIRES }, |
489 | { "dkim_headernames", vtype_dkim, (void *)DKIM_HEADERNAMES }, | |
490 | { "dkim_identity", vtype_dkim, (void *)DKIM_IDENTITY }, | |
491 | { "dkim_key_granularity",vtype_dkim, (void *)DKIM_KEY_GRANULARITY }, | |
492 | { "dkim_key_nosubdomains",vtype_dkim, (void *)DKIM_NOSUBDOMAINS }, | |
493 | { "dkim_key_notes", vtype_dkim, (void *)DKIM_KEY_NOTES }, | |
494 | { "dkim_key_srvtype", vtype_dkim, (void *)DKIM_KEY_SRVTYPE }, | |
495 | { "dkim_key_testing", vtype_dkim, (void *)DKIM_KEY_TESTING }, | |
e08d09e5 | 496 | { "dkim_selector", vtype_stringptr, &dkim_signing_selector }, |
9e5d6b55 | 497 | { "dkim_signers", vtype_stringptr, &dkim_signers }, |
80a47a2c TK |
498 | { "dkim_verify_reason", vtype_dkim, (void *)DKIM_VERIFY_REASON }, |
499 | { "dkim_verify_status", vtype_dkim, (void *)DKIM_VERIFY_STATUS}, | |
4840604e TL |
500 | #endif |
501 | #ifdef EXPERIMENTAL_DMARC | |
502 | { "dmarc_ar_header", vtype_stringptr, &dmarc_ar_header }, | |
8c8b8274 | 503 | { "dmarc_domain_policy", vtype_stringptr, &dmarc_domain_policy }, |
4840604e TL |
504 | { "dmarc_status", vtype_stringptr, &dmarc_status }, |
505 | { "dmarc_status_text", vtype_stringptr, &dmarc_status_text }, | |
506 | { "dmarc_used_domain", vtype_stringptr, &dmarc_used_domain }, | |
8523533c | 507 | #endif |
059ec3d9 | 508 | { "dnslist_domain", vtype_stringptr, &dnslist_domain }, |
93655c46 | 509 | { "dnslist_matched", vtype_stringptr, &dnslist_matched }, |
059ec3d9 PH |
510 | { "dnslist_text", vtype_stringptr, &dnslist_text }, |
511 | { "dnslist_value", vtype_stringptr, &dnslist_value }, | |
512 | { "domain", vtype_stringptr, &deliver_domain }, | |
513 | { "domain_data", vtype_stringptr, &deliver_domain_data }, | |
774ef2d7 JH |
514 | #ifdef EXPERIMENTAL_EVENT |
515 | { "event_data", vtype_stringptr, &event_data }, | |
516 | ||
517 | /*XXX want to use generic vars for as many of these as possible*/ | |
518 | { "event_defer_errno", vtype_int, &event_defer_errno }, | |
519 | ||
520 | { "event_name", vtype_stringptr, &event_name }, | |
521 | #endif | |
059ec3d9 PH |
522 | { "exim_gid", vtype_gid, &exim_gid }, |
523 | { "exim_path", vtype_stringptr, &exim_path }, | |
524 | { "exim_uid", vtype_uid, &exim_uid }, | |
71224040 | 525 | { "exim_version", vtype_stringptr, &version_string }, |
8523533c TK |
526 | #ifdef WITH_OLD_DEMIME |
527 | { "found_extension", vtype_stringptr, &found_extension }, | |
8e669ac1 | 528 | #endif |
362145b5 | 529 | { "headers_added", vtype_string_func, &fn_hdrs_added }, |
059ec3d9 PH |
530 | { "home", vtype_stringptr, &deliver_home }, |
531 | { "host", vtype_stringptr, &deliver_host }, | |
532 | { "host_address", vtype_stringptr, &deliver_host_address }, | |
533 | { "host_data", vtype_stringptr, &host_data }, | |
b08b24c8 | 534 | { "host_lookup_deferred",vtype_int, &host_lookup_deferred }, |
059ec3d9 | 535 | { "host_lookup_failed", vtype_int, &host_lookup_failed }, |
a7538db1 | 536 | { "host_port", vtype_int, &deliver_host_port }, |
059ec3d9 PH |
537 | { "inode", vtype_ino, &deliver_inode }, |
538 | { "interface_address", vtype_stringptr, &interface_address }, | |
539 | { "interface_port", vtype_int, &interface_port }, | |
0ce9abe6 | 540 | { "item", vtype_stringptr, &iterate_item }, |
059ec3d9 PH |
541 | #ifdef LOOKUP_LDAP |
542 | { "ldap_dn", vtype_stringptr, &eldap_dn }, | |
543 | #endif | |
544 | { "load_average", vtype_load_avg, NULL }, | |
545 | { "local_part", vtype_stringptr, &deliver_localpart }, | |
546 | { "local_part_data", vtype_stringptr, &deliver_localpart_data }, | |
547 | { "local_part_prefix", vtype_stringptr, &deliver_localpart_prefix }, | |
548 | { "local_part_suffix", vtype_stringptr, &deliver_localpart_suffix }, | |
549 | { "local_scan_data", vtype_stringptr, &local_scan_data }, | |
550 | { "local_user_gid", vtype_gid, &local_user_gid }, | |
551 | { "local_user_uid", vtype_uid, &local_user_uid }, | |
552 | { "localhost_number", vtype_int, &host_number }, | |
5cb8cbc6 | 553 | { "log_inodes", vtype_pinodes, (void *)FALSE }, |
8e669ac1 | 554 | { "log_space", vtype_pspace, (void *)FALSE }, |
4e0983dc | 555 | { "lookup_dnssec_authenticated",vtype_stringptr,&lookup_dnssec_authenticated}, |
059ec3d9 | 556 | { "mailstore_basename", vtype_stringptr, &mailstore_basename }, |
8523533c TK |
557 | #ifdef WITH_CONTENT_SCAN |
558 | { "malware_name", vtype_stringptr, &malware_name }, | |
559 | #endif | |
d677b2f2 | 560 | { "max_received_linelength", vtype_int, &max_received_linelength }, |
059ec3d9 PH |
561 | { "message_age", vtype_int, &message_age }, |
562 | { "message_body", vtype_msgbody, &message_body }, | |
563 | { "message_body_end", vtype_msgbody_end, &message_body_end }, | |
564 | { "message_body_size", vtype_int, &message_body_size }, | |
1ab52c69 | 565 | { "message_exim_id", vtype_stringptr, &message_id }, |
059ec3d9 | 566 | { "message_headers", vtype_msgheaders, NULL }, |
ff75a1f7 | 567 | { "message_headers_raw", vtype_msgheaders_raw, NULL }, |
059ec3d9 | 568 | { "message_id", vtype_stringptr, &message_id }, |
2e0c1448 | 569 | { "message_linecount", vtype_int, &message_linecount }, |
059ec3d9 | 570 | { "message_size", vtype_int, &message_size }, |
eb02f5df JH |
571 | #ifdef EXPERIMENTAL_INTERNATIONAL |
572 | { "message_smtputf8", vtype_bool, &message_smtputf8 }, | |
573 | #endif | |
8523533c TK |
574 | #ifdef WITH_CONTENT_SCAN |
575 | { "mime_anomaly_level", vtype_int, &mime_anomaly_level }, | |
576 | { "mime_anomaly_text", vtype_stringptr, &mime_anomaly_text }, | |
577 | { "mime_boundary", vtype_stringptr, &mime_boundary }, | |
578 | { "mime_charset", vtype_stringptr, &mime_charset }, | |
579 | { "mime_content_description", vtype_stringptr, &mime_content_description }, | |
580 | { "mime_content_disposition", vtype_stringptr, &mime_content_disposition }, | |
581 | { "mime_content_id", vtype_stringptr, &mime_content_id }, | |
582 | { "mime_content_size", vtype_int, &mime_content_size }, | |
583 | { "mime_content_transfer_encoding",vtype_stringptr, &mime_content_transfer_encoding }, | |
584 | { "mime_content_type", vtype_stringptr, &mime_content_type }, | |
585 | { "mime_decoded_filename", vtype_stringptr, &mime_decoded_filename }, | |
586 | { "mime_filename", vtype_stringptr, &mime_filename }, | |
587 | { "mime_is_coverletter", vtype_int, &mime_is_coverletter }, | |
588 | { "mime_is_multipart", vtype_int, &mime_is_multipart }, | |
589 | { "mime_is_rfc822", vtype_int, &mime_is_rfc822 }, | |
590 | { "mime_part_count", vtype_int, &mime_part_count }, | |
591 | #endif | |
059ec3d9 PH |
592 | { "n0", vtype_filter_int, &filter_n[0] }, |
593 | { "n1", vtype_filter_int, &filter_n[1] }, | |
594 | { "n2", vtype_filter_int, &filter_n[2] }, | |
595 | { "n3", vtype_filter_int, &filter_n[3] }, | |
596 | { "n4", vtype_filter_int, &filter_n[4] }, | |
597 | { "n5", vtype_filter_int, &filter_n[5] }, | |
598 | { "n6", vtype_filter_int, &filter_n[6] }, | |
599 | { "n7", vtype_filter_int, &filter_n[7] }, | |
600 | { "n8", vtype_filter_int, &filter_n[8] }, | |
601 | { "n9", vtype_filter_int, &filter_n[9] }, | |
602 | { "original_domain", vtype_stringptr, &deliver_domain_orig }, | |
603 | { "original_local_part", vtype_stringptr, &deliver_localpart_orig }, | |
604 | { "originator_gid", vtype_gid, &originator_gid }, | |
605 | { "originator_uid", vtype_uid, &originator_uid }, | |
606 | { "parent_domain", vtype_stringptr, &deliver_domain_parent }, | |
607 | { "parent_local_part", vtype_stringptr, &deliver_localpart_parent }, | |
608 | { "pid", vtype_pid, NULL }, | |
858e91c2 JH |
609 | #ifndef DISABLE_PRDR |
610 | { "prdr_requested", vtype_bool, &prdr_requested }, | |
611 | #endif | |
059ec3d9 | 612 | { "primary_hostname", vtype_stringptr, &primary_hostname }, |
a3c86431 | 613 | #ifdef EXPERIMENTAL_PROXY |
a3bddaa8 TL |
614 | { "proxy_host_address", vtype_stringptr, &proxy_host_address }, |
615 | { "proxy_host_port", vtype_int, &proxy_host_port }, | |
a3c86431 | 616 | { "proxy_session", vtype_bool, &proxy_session }, |
eb57651e TL |
617 | { "proxy_target_address",vtype_stringptr, &proxy_target_address }, |
618 | { "proxy_target_port", vtype_int, &proxy_target_port }, | |
a3c86431 | 619 | #endif |
fffda43a TK |
620 | { "prvscheck_address", vtype_stringptr, &prvscheck_address }, |
621 | { "prvscheck_keynum", vtype_stringptr, &prvscheck_keynum }, | |
622 | { "prvscheck_result", vtype_stringptr, &prvscheck_result }, | |
059ec3d9 PH |
623 | { "qualify_domain", vtype_stringptr, &qualify_domain_sender }, |
624 | { "qualify_recipient", vtype_stringptr, &qualify_domain_recipient }, | |
625 | { "rcpt_count", vtype_int, &rcpt_count }, | |
626 | { "rcpt_defer_count", vtype_int, &rcpt_defer_count }, | |
627 | { "rcpt_fail_count", vtype_int, &rcpt_fail_count }, | |
628 | { "received_count", vtype_int, &received_count }, | |
629 | { "received_for", vtype_stringptr, &received_for }, | |
194cc0e4 PH |
630 | { "received_ip_address", vtype_stringptr, &interface_address }, |
631 | { "received_port", vtype_int, &interface_port }, | |
059ec3d9 | 632 | { "received_protocol", vtype_stringptr, &received_protocol }, |
7dbf77c9 | 633 | { "received_time", vtype_int, &received_time }, |
059ec3d9 | 634 | { "recipient_data", vtype_stringptr, &recipient_data }, |
8e669ac1 | 635 | { "recipient_verify_failure",vtype_stringptr,&recipient_verify_failure }, |
362145b5 | 636 | { "recipients", vtype_string_func, &fn_recipients }, |
059ec3d9 | 637 | { "recipients_count", vtype_int, &recipients_count }, |
8523533c TK |
638 | #ifdef WITH_CONTENT_SCAN |
639 | { "regex_match_string", vtype_stringptr, ®ex_match_string }, | |
640 | #endif | |
059ec3d9 PH |
641 | { "reply_address", vtype_reply, NULL }, |
642 | { "return_path", vtype_stringptr, &return_path }, | |
643 | { "return_size_limit", vtype_int, &bounce_return_size_limit }, | |
181d9bf8 | 644 | { "router_name", vtype_stringptr, &router_name }, |
059ec3d9 PH |
645 | { "runrc", vtype_int, &runrc }, |
646 | { "self_hostname", vtype_stringptr, &self_hostname }, | |
647 | { "sender_address", vtype_stringptr, &sender_address }, | |
2a3eea10 | 648 | { "sender_address_data", vtype_stringptr, &sender_address_data }, |
059ec3d9 PH |
649 | { "sender_address_domain", vtype_domain, &sender_address }, |
650 | { "sender_address_local_part", vtype_localpart, &sender_address }, | |
651 | { "sender_data", vtype_stringptr, &sender_data }, | |
652 | { "sender_fullhost", vtype_stringptr, &sender_fullhost }, | |
1705dd20 | 653 | { "sender_helo_dnssec", vtype_bool, &sender_helo_dnssec }, |
059ec3d9 PH |
654 | { "sender_helo_name", vtype_stringptr, &sender_helo_name }, |
655 | { "sender_host_address", vtype_stringptr, &sender_host_address }, | |
656 | { "sender_host_authenticated",vtype_stringptr, &sender_host_authenticated }, | |
11d7e4fa | 657 | { "sender_host_dnssec", vtype_bool, &sender_host_dnssec }, |
059ec3d9 PH |
658 | { "sender_host_name", vtype_host_lookup, NULL }, |
659 | { "sender_host_port", vtype_int, &sender_host_port }, | |
660 | { "sender_ident", vtype_stringptr, &sender_ident }, | |
870f6ba8 TF |
661 | { "sender_rate", vtype_stringptr, &sender_rate }, |
662 | { "sender_rate_limit", vtype_stringptr, &sender_rate_limit }, | |
663 | { "sender_rate_period", vtype_stringptr, &sender_rate_period }, | |
059ec3d9 | 664 | { "sender_rcvhost", vtype_stringptr, &sender_rcvhost }, |
8e669ac1 | 665 | { "sender_verify_failure",vtype_stringptr, &sender_verify_failure }, |
41c7c167 PH |
666 | { "sending_ip_address", vtype_stringptr, &sending_ip_address }, |
667 | { "sending_port", vtype_int, &sending_port }, | |
8e669ac1 | 668 | { "smtp_active_hostname", vtype_stringptr, &smtp_active_hostname }, |
3ee512ff PH |
669 | { "smtp_command", vtype_stringptr, &smtp_cmd_buffer }, |
670 | { "smtp_command_argument", vtype_stringptr, &smtp_cmd_argument }, | |
b01dd148 | 671 | { "smtp_count_at_connection_start", vtype_int, &smtp_accept_count }, |
8f128379 | 672 | { "smtp_notquit_reason", vtype_stringptr, &smtp_notquit_reason }, |
059ec3d9 PH |
673 | { "sn0", vtype_filter_int, &filter_sn[0] }, |
674 | { "sn1", vtype_filter_int, &filter_sn[1] }, | |
675 | { "sn2", vtype_filter_int, &filter_sn[2] }, | |
676 | { "sn3", vtype_filter_int, &filter_sn[3] }, | |
677 | { "sn4", vtype_filter_int, &filter_sn[4] }, | |
678 | { "sn5", vtype_filter_int, &filter_sn[5] }, | |
679 | { "sn6", vtype_filter_int, &filter_sn[6] }, | |
680 | { "sn7", vtype_filter_int, &filter_sn[7] }, | |
681 | { "sn8", vtype_filter_int, &filter_sn[8] }, | |
682 | { "sn9", vtype_filter_int, &filter_sn[9] }, | |
8523533c | 683 | #ifdef WITH_CONTENT_SCAN |
c5f280e2 | 684 | { "spam_action", vtype_stringptr, &spam_action }, |
8523533c TK |
685 | { "spam_bar", vtype_stringptr, &spam_bar }, |
686 | { "spam_report", vtype_stringptr, &spam_report }, | |
687 | { "spam_score", vtype_stringptr, &spam_score }, | |
688 | { "spam_score_int", vtype_stringptr, &spam_score_int }, | |
689 | #endif | |
690 | #ifdef EXPERIMENTAL_SPF | |
65a7d8c3 | 691 | { "spf_guess", vtype_stringptr, &spf_guess }, |
8523533c TK |
692 | { "spf_header_comment", vtype_stringptr, &spf_header_comment }, |
693 | { "spf_received", vtype_stringptr, &spf_received }, | |
694 | { "spf_result", vtype_stringptr, &spf_result }, | |
695 | { "spf_smtp_comment", vtype_stringptr, &spf_smtp_comment }, | |
696 | #endif | |
059ec3d9 | 697 | { "spool_directory", vtype_stringptr, &spool_directory }, |
5cb8cbc6 | 698 | { "spool_inodes", vtype_pinodes, (void *)TRUE }, |
8e669ac1 | 699 | { "spool_space", vtype_pspace, (void *)TRUE }, |
8523533c TK |
700 | #ifdef EXPERIMENTAL_SRS |
701 | { "srs_db_address", vtype_stringptr, &srs_db_address }, | |
702 | { "srs_db_key", vtype_stringptr, &srs_db_key }, | |
703 | { "srs_orig_recipient", vtype_stringptr, &srs_orig_recipient }, | |
704 | { "srs_orig_sender", vtype_stringptr, &srs_orig_sender }, | |
705 | { "srs_recipient", vtype_stringptr, &srs_recipient }, | |
706 | { "srs_status", vtype_stringptr, &srs_status }, | |
707 | #endif | |
059ec3d9 | 708 | { "thisaddress", vtype_stringptr, &filter_thisaddress }, |
817d9f57 | 709 | |
d9b2312b | 710 | /* The non-(in,out) variables are now deprecated */ |
817d9f57 JH |
711 | { "tls_bits", vtype_int, &tls_in.bits }, |
712 | { "tls_certificate_verified", vtype_int, &tls_in.certificate_verified }, | |
713 | { "tls_cipher", vtype_stringptr, &tls_in.cipher }, | |
d9b2312b JH |
714 | |
715 | { "tls_in_bits", vtype_int, &tls_in.bits }, | |
716 | { "tls_in_certificate_verified", vtype_int, &tls_in.certificate_verified }, | |
717 | { "tls_in_cipher", vtype_stringptr, &tls_in.cipher }, | |
44662487 | 718 | { "tls_in_ocsp", vtype_int, &tls_in.ocsp }, |
9d1c15ef JH |
719 | { "tls_in_ourcert", vtype_cert, &tls_in.ourcert }, |
720 | { "tls_in_peercert", vtype_cert, &tls_in.peercert }, | |
d9b2312b | 721 | { "tls_in_peerdn", vtype_stringptr, &tls_in.peerdn }, |
4b57b15d | 722 | #if defined(SUPPORT_TLS) |
d9b2312b JH |
723 | { "tls_in_sni", vtype_stringptr, &tls_in.sni }, |
724 | #endif | |
817d9f57 | 725 | { "tls_out_bits", vtype_int, &tls_out.bits }, |
cb9d95ae | 726 | { "tls_out_certificate_verified", vtype_int,&tls_out.certificate_verified }, |
817d9f57 | 727 | { "tls_out_cipher", vtype_stringptr, &tls_out.cipher }, |
594706ea JH |
728 | #ifdef EXPERIMENTAL_DANE |
729 | { "tls_out_dane", vtype_bool, &tls_out.dane_verified }, | |
730 | #endif | |
44662487 | 731 | { "tls_out_ocsp", vtype_int, &tls_out.ocsp }, |
9d1c15ef JH |
732 | { "tls_out_ourcert", vtype_cert, &tls_out.ourcert }, |
733 | { "tls_out_peercert", vtype_cert, &tls_out.peercert }, | |
817d9f57 | 734 | { "tls_out_peerdn", vtype_stringptr, &tls_out.peerdn }, |
4b57b15d | 735 | #if defined(SUPPORT_TLS) |
817d9f57 | 736 | { "tls_out_sni", vtype_stringptr, &tls_out.sni }, |
7be682ca | 737 | #endif |
594706ea JH |
738 | #ifdef EXPERIMENTAL_DANE |
739 | { "tls_out_tlsa_usage", vtype_int, &tls_out.tlsa_usage }, | |
740 | #endif | |
d9b2312b | 741 | |
613dd4ae | 742 | { "tls_peerdn", vtype_stringptr, &tls_in.peerdn }, /* mind the alphabetical order! */ |
4b57b15d | 743 | #if defined(SUPPORT_TLS) |
613dd4ae JH |
744 | { "tls_sni", vtype_stringptr, &tls_in.sni }, /* mind the alphabetical order! */ |
745 | #endif | |
817d9f57 | 746 | |
059ec3d9 PH |
747 | { "tod_bsdinbox", vtype_todbsdin, NULL }, |
748 | { "tod_epoch", vtype_tode, NULL }, | |
f5787926 | 749 | { "tod_epoch_l", vtype_todel, NULL }, |
059ec3d9 PH |
750 | { "tod_full", vtype_todf, NULL }, |
751 | { "tod_log", vtype_todl, NULL }, | |
752 | { "tod_logfile", vtype_todlf, NULL }, | |
753 | { "tod_zone", vtype_todzone, NULL }, | |
754 | { "tod_zulu", vtype_todzulu, NULL }, | |
181d9bf8 | 755 | { "transport_name", vtype_stringptr, &transport_name }, |
059ec3d9 | 756 | { "value", vtype_stringptr, &lookup_value }, |
aec45841 | 757 | { "verify_mode", vtype_stringptr, &verify_mode }, |
059ec3d9 PH |
758 | { "version_number", vtype_stringptr, &version_string }, |
759 | { "warn_message_delay", vtype_stringptr, &warnmsg_delay }, | |
760 | { "warn_message_recipient",vtype_stringptr, &warnmsg_recipients }, | |
761 | { "warn_message_recipients",vtype_stringptr,&warnmsg_recipients }, | |
762 | { "warnmsg_delay", vtype_stringptr, &warnmsg_delay }, | |
763 | { "warnmsg_recipient", vtype_stringptr, &warnmsg_recipients }, | |
764 | { "warnmsg_recipients", vtype_stringptr, &warnmsg_recipients } | |
765 | }; | |
766 | ||
0539a19d | 767 | static int var_table_size = nelem(var_table); |
059ec3d9 PH |
768 | static uschar var_buffer[256]; |
769 | static BOOL malformed_header; | |
770 | ||
771 | /* For textual hashes */ | |
772 | ||
1ba28e2b PP |
773 | static const char *hashcodes = "abcdefghijklmnopqrtsuvwxyz" |
774 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
775 | "0123456789"; | |
059ec3d9 PH |
776 | |
777 | enum { HMAC_MD5, HMAC_SHA1 }; | |
778 | ||
779 | /* For numeric hashes */ | |
780 | ||
781 | static unsigned int prime[] = { | |
782 | 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, | |
783 | 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, | |
784 | 73, 79, 83, 89, 97, 101, 103, 107, 109, 113}; | |
785 | ||
786 | /* For printing modes in symbolic form */ | |
787 | ||
788 | static uschar *mtable_normal[] = | |
789 | { US"---", US"--x", US"-w-", US"-wx", US"r--", US"r-x", US"rw-", US"rwx" }; | |
790 | ||
791 | static uschar *mtable_setid[] = | |
792 | { US"--S", US"--s", US"-wS", US"-ws", US"r-S", US"r-s", US"rwS", US"rws" }; | |
793 | ||
794 | static uschar *mtable_sticky[] = | |
795 | { US"--T", US"--t", US"-wT", US"-wt", US"r-T", US"r-t", US"rwT", US"rwt" }; | |
796 | ||
797 | ||
798 | ||
799 | /************************************************* | |
800 | * Tables for UTF-8 support * | |
801 | *************************************************/ | |
802 | ||
803 | /* Table of the number of extra characters, indexed by the first character | |
804 | masked with 0x3f. The highest number for a valid UTF-8 character is in fact | |
805 | 0x3d. */ | |
806 | ||
807 | static uschar utf8_table1[] = { | |
808 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
809 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
810 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, | |
811 | 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 }; | |
812 | ||
813 | /* These are the masks for the data bits in the first byte of a character, | |
814 | indexed by the number of additional bytes. */ | |
815 | ||
816 | static int utf8_table2[] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01}; | |
817 | ||
818 | /* Get the next UTF-8 character, advancing the pointer. */ | |
819 | ||
820 | #define GETUTF8INC(c, ptr) \ | |
821 | c = *ptr++; \ | |
822 | if ((c & 0xc0) == 0xc0) \ | |
823 | { \ | |
824 | int a = utf8_table1[c & 0x3f]; /* Number of additional bytes */ \ | |
825 | int s = 6*a; \ | |
826 | c = (c & utf8_table2[a]) << s; \ | |
827 | while (a-- > 0) \ | |
828 | { \ | |
829 | s -= 6; \ | |
830 | c |= (*ptr++ & 0x3f) << s; \ | |
831 | } \ | |
832 | } | |
833 | ||
834 | ||
835 | /************************************************* | |
836 | * Binary chop search on a table * | |
837 | *************************************************/ | |
838 | ||
839 | /* This is used for matching expansion items and operators. | |
840 | ||
841 | Arguments: | |
842 | name the name that is being sought | |
843 | table the table to search | |
844 | table_size the number of items in the table | |
845 | ||
846 | Returns: the offset in the table, or -1 | |
847 | */ | |
848 | ||
849 | static int | |
850 | chop_match(uschar *name, uschar **table, int table_size) | |
851 | { | |
852 | uschar **bot = table; | |
853 | uschar **top = table + table_size; | |
854 | ||
855 | while (top > bot) | |
856 | { | |
857 | uschar **mid = bot + (top - bot)/2; | |
858 | int c = Ustrcmp(name, *mid); | |
859 | if (c == 0) return mid - table; | |
860 | if (c > 0) bot = mid + 1; else top = mid; | |
861 | } | |
862 | ||
863 | return -1; | |
864 | } | |
865 | ||
866 | ||
867 | ||
868 | /************************************************* | |
869 | * Check a condition string * | |
870 | *************************************************/ | |
871 | ||
872 | /* This function is called to expand a string, and test the result for a "true" | |
873 | or "false" value. Failure of the expansion yields FALSE; logged unless it was a | |
be7a5781 JH |
874 | forced fail or lookup defer. |
875 | ||
876 | We used to release all store used, but this is not not safe due | |
877 | to ${dlfunc } and ${acl }. In any case expand_string_internal() | |
878 | is reasonably careful to release what it can. | |
059ec3d9 | 879 | |
6a8de854 PP |
880 | The actual false-value tests should be replicated for ECOND_BOOL_LAX. |
881 | ||
059ec3d9 PH |
882 | Arguments: |
883 | condition the condition string | |
884 | m1 text to be incorporated in panic error | |
885 | m2 ditto | |
886 | ||
887 | Returns: TRUE if condition is met, FALSE if not | |
888 | */ | |
889 | ||
890 | BOOL | |
891 | expand_check_condition(uschar *condition, uschar *m1, uschar *m2) | |
892 | { | |
893 | int rc; | |
059ec3d9 PH |
894 | uschar *ss = expand_string(condition); |
895 | if (ss == NULL) | |
896 | { | |
897 | if (!expand_string_forcedfail && !search_find_defer) | |
898 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand condition \"%s\" " | |
899 | "for %s %s: %s", condition, m1, m2, expand_string_message); | |
900 | return FALSE; | |
901 | } | |
902 | rc = ss[0] != 0 && Ustrcmp(ss, "0") != 0 && strcmpic(ss, US"no") != 0 && | |
903 | strcmpic(ss, US"false") != 0; | |
059ec3d9 PH |
904 | return rc; |
905 | } | |
906 | ||
907 | ||
908 | ||
17c76198 | 909 | |
9e3331ea TK |
910 | /************************************************* |
911 | * Pseudo-random number generation * | |
912 | *************************************************/ | |
913 | ||
914 | /* Pseudo-random number generation. The result is not "expected" to be | |
915 | cryptographically strong but not so weak that someone will shoot themselves | |
916 | in the foot using it as a nonce in some email header scheme or whatever | |
917 | weirdness they'll twist this into. The result should ideally handle fork(). | |
918 | ||
919 | However, if we're stuck unable to provide this, then we'll fall back to | |
920 | appallingly bad randomness. | |
921 | ||
17c76198 PP |
922 | If SUPPORT_TLS is defined then this will not be used except as an emergency |
923 | fallback. | |
9e3331ea TK |
924 | |
925 | Arguments: | |
926 | max range maximum | |
927 | Returns a random number in range [0, max-1] | |
928 | */ | |
929 | ||
17c76198 PP |
930 | #ifdef SUPPORT_TLS |
931 | # define vaguely_random_number vaguely_random_number_fallback | |
932 | #endif | |
9e3331ea | 933 | int |
17c76198 | 934 | vaguely_random_number(int max) |
9e3331ea | 935 | { |
17c76198 PP |
936 | #ifdef SUPPORT_TLS |
937 | # undef vaguely_random_number | |
938 | #endif | |
9e3331ea TK |
939 | static pid_t pid = 0; |
940 | pid_t p2; | |
941 | #if defined(HAVE_SRANDOM) && !defined(HAVE_SRANDOMDEV) | |
942 | struct timeval tv; | |
943 | #endif | |
944 | ||
945 | p2 = getpid(); | |
946 | if (p2 != pid) | |
947 | { | |
948 | if (pid != 0) | |
949 | { | |
950 | ||
951 | #ifdef HAVE_ARC4RANDOM | |
952 | /* cryptographically strong randomness, common on *BSD platforms, not | |
953 | so much elsewhere. Alas. */ | |
46ca7017 | 954 | #ifndef NOT_HAVE_ARC4RANDOM_STIR |
9e3331ea | 955 | arc4random_stir(); |
46ca7017 | 956 | #endif |
9e3331ea TK |
957 | #elif defined(HAVE_SRANDOM) || defined(HAVE_SRANDOMDEV) |
958 | #ifdef HAVE_SRANDOMDEV | |
959 | /* uses random(4) for seeding */ | |
960 | srandomdev(); | |
961 | #else | |
962 | gettimeofday(&tv, NULL); | |
963 | srandom(tv.tv_sec | tv.tv_usec | getpid()); | |
964 | #endif | |
965 | #else | |
966 | /* Poor randomness and no seeding here */ | |
967 | #endif | |
968 | ||
969 | } | |
970 | pid = p2; | |
971 | } | |
972 | ||
973 | #ifdef HAVE_ARC4RANDOM | |
974 | return arc4random() % max; | |
975 | #elif defined(HAVE_SRANDOM) || defined(HAVE_SRANDOMDEV) | |
976 | return random() % max; | |
977 | #else | |
978 | /* This one returns a 16-bit number, definitely not crypto-strong */ | |
979 | return random_number(max); | |
980 | #endif | |
981 | } | |
982 | ||
17c76198 PP |
983 | |
984 | ||
9e3331ea | 985 | |
059ec3d9 PH |
986 | /************************************************* |
987 | * Pick out a name from a string * | |
988 | *************************************************/ | |
989 | ||
990 | /* If the name is too long, it is silently truncated. | |
991 | ||
992 | Arguments: | |
993 | name points to a buffer into which to put the name | |
994 | max is the length of the buffer | |
995 | s points to the first alphabetic character of the name | |
996 | extras chars other than alphanumerics to permit | |
997 | ||
998 | Returns: pointer to the first character after the name | |
999 | ||
1000 | Note: The test for *s != 0 in the while loop is necessary because | |
1001 | Ustrchr() yields non-NULL if the character is zero (which is not something | |
1002 | I expected). */ | |
1003 | ||
55414b25 JH |
1004 | static const uschar * |
1005 | read_name(uschar *name, int max, const uschar *s, uschar *extras) | |
059ec3d9 PH |
1006 | { |
1007 | int ptr = 0; | |
1008 | while (*s != 0 && (isalnum(*s) || Ustrchr(extras, *s) != NULL)) | |
1009 | { | |
1010 | if (ptr < max-1) name[ptr++] = *s; | |
1011 | s++; | |
1012 | } | |
1013 | name[ptr] = 0; | |
1014 | return s; | |
1015 | } | |
1016 | ||
1017 | ||
1018 | ||
1019 | /************************************************* | |
1020 | * Pick out the rest of a header name * | |
1021 | *************************************************/ | |
1022 | ||
1023 | /* A variable name starting $header_ (or just $h_ for those who like | |
1024 | abbreviations) might not be the complete header name because headers can | |
1025 | contain any printing characters in their names, except ':'. This function is | |
1026 | called to read the rest of the name, chop h[eader]_ off the front, and put ':' | |
1027 | on the end, if the name was terminated by white space. | |
1028 | ||
1029 | Arguments: | |
1030 | name points to a buffer in which the name read so far exists | |
1031 | max is the length of the buffer | |
1032 | s points to the first character after the name so far, i.e. the | |
1033 | first non-alphameric character after $header_xxxxx | |
1034 | ||
1035 | Returns: a pointer to the first character after the header name | |
1036 | */ | |
1037 | ||
55414b25 JH |
1038 | static const uschar * |
1039 | read_header_name(uschar *name, int max, const uschar *s) | |
059ec3d9 PH |
1040 | { |
1041 | int prelen = Ustrchr(name, '_') - name + 1; | |
1042 | int ptr = Ustrlen(name) - prelen; | |
1043 | if (ptr > 0) memmove(name, name+prelen, ptr); | |
1044 | while (mac_isgraph(*s) && *s != ':') | |
1045 | { | |
1046 | if (ptr < max-1) name[ptr++] = *s; | |
1047 | s++; | |
1048 | } | |
1049 | if (*s == ':') s++; | |
1050 | name[ptr++] = ':'; | |
1051 | name[ptr] = 0; | |
1052 | return s; | |
1053 | } | |
1054 | ||
1055 | ||
1056 | ||
1057 | /************************************************* | |
1058 | * Pick out a number from a string * | |
1059 | *************************************************/ | |
1060 | ||
1061 | /* Arguments: | |
1062 | n points to an integer into which to put the number | |
1063 | s points to the first digit of the number | |
1064 | ||
1065 | Returns: a pointer to the character after the last digit | |
1066 | */ | |
1067 | ||
1068 | static uschar * | |
1069 | read_number(int *n, uschar *s) | |
1070 | { | |
1071 | *n = 0; | |
1072 | while (isdigit(*s)) *n = *n * 10 + (*s++ - '0'); | |
1073 | return s; | |
1074 | } | |
1075 | ||
55414b25 JH |
1076 | static const uschar * |
1077 | read_cnumber(int *n, const uschar *s) | |
1078 | { | |
1079 | *n = 0; | |
1080 | while (isdigit(*s)) *n = *n * 10 + (*s++ - '0'); | |
1081 | return s; | |
1082 | } | |
1083 | ||
059ec3d9 PH |
1084 | |
1085 | ||
1086 | /************************************************* | |
1087 | * Extract keyed subfield from a string * | |
1088 | *************************************************/ | |
1089 | ||
1090 | /* The yield is in dynamic store; NULL means that the key was not found. | |
1091 | ||
1092 | Arguments: | |
1093 | key points to the name of the key | |
1094 | s points to the string from which to extract the subfield | |
1095 | ||
1096 | Returns: NULL if the subfield was not found, or | |
1097 | a pointer to the subfield's data | |
1098 | */ | |
1099 | ||
1100 | static uschar * | |
55414b25 | 1101 | expand_getkeyed(uschar *key, const uschar *s) |
059ec3d9 PH |
1102 | { |
1103 | int length = Ustrlen(key); | |
1104 | while (isspace(*s)) s++; | |
1105 | ||
1106 | /* Loop to search for the key */ | |
1107 | ||
1108 | while (*s != 0) | |
1109 | { | |
1110 | int dkeylength; | |
1111 | uschar *data; | |
55414b25 | 1112 | const uschar *dkey = s; |
059ec3d9 PH |
1113 | |
1114 | while (*s != 0 && *s != '=' && !isspace(*s)) s++; | |
1115 | dkeylength = s - dkey; | |
1116 | while (isspace(*s)) s++; | |
1117 | if (*s == '=') while (isspace((*(++s)))); | |
1118 | ||
1119 | data = string_dequote(&s); | |
1120 | if (length == dkeylength && strncmpic(key, dkey, length) == 0) | |
1121 | return data; | |
1122 | ||
1123 | while (isspace(*s)) s++; | |
1124 | } | |
1125 | ||
1126 | return NULL; | |
1127 | } | |
1128 | ||
1129 | ||
1130 | ||
9d1c15ef JH |
1131 | static var_entry * |
1132 | find_var_ent(uschar * name) | |
1133 | { | |
1134 | int first = 0; | |
1135 | int last = var_table_size; | |
1136 | ||
1137 | while (last > first) | |
1138 | { | |
1139 | int middle = (first + last)/2; | |
1140 | int c = Ustrcmp(name, var_table[middle].name); | |
1141 | ||
1142 | if (c > 0) { first = middle + 1; continue; } | |
1143 | if (c < 0) { last = middle; continue; } | |
1144 | return &var_table[middle]; | |
1145 | } | |
1146 | return NULL; | |
1147 | } | |
059ec3d9 PH |
1148 | |
1149 | /************************************************* | |
1150 | * Extract numbered subfield from string * | |
1151 | *************************************************/ | |
1152 | ||
1153 | /* Extracts a numbered field from a string that is divided by tokens - for | |
1154 | example a line from /etc/passwd is divided by colon characters. First field is | |
1155 | numbered one. Negative arguments count from the right. Zero returns the whole | |
1156 | string. Returns NULL if there are insufficient tokens in the string | |
1157 | ||
1158 | ***WARNING*** | |
1159 | Modifies final argument - this is a dynamically generated string, so that's OK. | |
1160 | ||
1161 | Arguments: | |
1162 | field number of field to be extracted, | |
1163 | first field = 1, whole string = 0, last field = -1 | |
1164 | separators characters that are used to break string into tokens | |
1165 | s points to the string from which to extract the subfield | |
1166 | ||
1167 | Returns: NULL if the field was not found, | |
1168 | a pointer to the field's data inside s (modified to add 0) | |
1169 | */ | |
1170 | ||
1171 | static uschar * | |
1172 | expand_gettokened (int field, uschar *separators, uschar *s) | |
1173 | { | |
1174 | int sep = 1; | |
1175 | int count; | |
1176 | uschar *ss = s; | |
1177 | uschar *fieldtext = NULL; | |
1178 | ||
1179 | if (field == 0) return s; | |
1180 | ||
1181 | /* Break the line up into fields in place; for field > 0 we stop when we have | |
1182 | done the number of fields we want. For field < 0 we continue till the end of | |
1183 | the string, counting the number of fields. */ | |
1184 | ||
1185 | count = (field > 0)? field : INT_MAX; | |
1186 | ||
1187 | while (count-- > 0) | |
1188 | { | |
1189 | size_t len; | |
1190 | ||
1191 | /* Previous field was the last one in the string. For a positive field | |
1192 | number, this means there are not enough fields. For a negative field number, | |
1193 | check that there are enough, and scan back to find the one that is wanted. */ | |
1194 | ||
1195 | if (sep == 0) | |
1196 | { | |
1197 | if (field > 0 || (-field) > (INT_MAX - count - 1)) return NULL; | |
1198 | if ((-field) == (INT_MAX - count - 1)) return s; | |
1199 | while (field++ < 0) | |
1200 | { | |
1201 | ss--; | |
1202 | while (ss[-1] != 0) ss--; | |
1203 | } | |
1204 | fieldtext = ss; | |
1205 | break; | |
1206 | } | |
1207 | ||
1208 | /* Previous field was not last in the string; save its start and put a | |
1209 | zero at its end. */ | |
1210 | ||
1211 | fieldtext = ss; | |
1212 | len = Ustrcspn(ss, separators); | |
1213 | sep = ss[len]; | |
1214 | ss[len] = 0; | |
1215 | ss += len + 1; | |
1216 | } | |
1217 | ||
1218 | return fieldtext; | |
1219 | } | |
1220 | ||
1221 | ||
aa26e137 | 1222 | static uschar * |
55414b25 | 1223 | expand_getlistele(int field, const uschar * list) |
aa26e137 | 1224 | { |
55414b25 | 1225 | const uschar * tlist= list; |
aa26e137 JH |
1226 | int sep= 0; |
1227 | uschar dummy; | |
1228 | ||
1229 | if(field<0) | |
0f0c8159 | 1230 | { |
aa26e137 JH |
1231 | for(field++; string_nextinlist(&tlist, &sep, &dummy, 1); ) field++; |
1232 | sep= 0; | |
0f0c8159 | 1233 | } |
aa26e137 JH |
1234 | if(field==0) return NULL; |
1235 | while(--field>0 && (string_nextinlist(&list, &sep, &dummy, 1))) ; | |
1236 | return string_nextinlist(&list, &sep, NULL, 0); | |
1237 | } | |
059ec3d9 | 1238 | |
9d1c15ef JH |
1239 | |
1240 | /* Certificate fields, by name. Worry about by-OID later */ | |
9e4dddbd | 1241 | /* Names are chosen to not have common prefixes */ |
9d1c15ef JH |
1242 | |
1243 | #ifdef SUPPORT_TLS | |
1244 | typedef struct | |
1245 | { | |
1246 | uschar * name; | |
9e4dddbd JH |
1247 | int namelen; |
1248 | uschar * (*getfn)(void * cert, uschar * mod); | |
9d1c15ef JH |
1249 | } certfield; |
1250 | static certfield certfields[] = | |
1251 | { /* linear search; no special order */ | |
9e4dddbd JH |
1252 | { US"version", 7, &tls_cert_version }, |
1253 | { US"serial_number", 13, &tls_cert_serial_number }, | |
1254 | { US"subject", 7, &tls_cert_subject }, | |
1255 | { US"notbefore", 9, &tls_cert_not_before }, | |
1256 | { US"notafter", 8, &tls_cert_not_after }, | |
1257 | { US"issuer", 6, &tls_cert_issuer }, | |
1258 | { US"signature", 9, &tls_cert_signature }, | |
1259 | { US"sig_algorithm", 13, &tls_cert_signature_algorithm }, | |
1260 | { US"subj_altname", 12, &tls_cert_subject_altname }, | |
1261 | { US"ocsp_uri", 8, &tls_cert_ocsp_uri }, | |
1262 | { US"crl_uri", 7, &tls_cert_crl_uri }, | |
9d1c15ef JH |
1263 | }; |
1264 | ||
1265 | static uschar * | |
1266 | expand_getcertele(uschar * field, uschar * certvar) | |
1267 | { | |
1268 | var_entry * vp; | |
1269 | certfield * cp; | |
1270 | ||
1271 | if (!(vp = find_var_ent(certvar))) | |
1272 | { | |
94431adb | 1273 | expand_string_message = |
9d1c15ef JH |
1274 | string_sprintf("no variable named \"%s\"", certvar); |
1275 | return NULL; /* Unknown variable name */ | |
1276 | } | |
1277 | /* NB this stops us passing certs around in variable. Might | |
1278 | want to do that in future */ | |
1279 | if (vp->type != vtype_cert) | |
1280 | { | |
94431adb | 1281 | expand_string_message = |
9d1c15ef JH |
1282 | string_sprintf("\"%s\" is not a certificate", certvar); |
1283 | return NULL; /* Unknown variable name */ | |
1284 | } | |
1285 | if (!*(void **)vp->value) | |
1286 | return NULL; | |
1287 | ||
1288 | if (*field >= '0' && *field <= '9') | |
1289 | return tls_cert_ext_by_oid(*(void **)vp->value, field, 0); | |
1290 | ||
1291 | for(cp = certfields; | |
0539a19d | 1292 | cp < certfields + nelem(certfields); |
9d1c15ef | 1293 | cp++) |
9e4dddbd JH |
1294 | if (Ustrncmp(cp->name, field, cp->namelen) == 0) |
1295 | { | |
1296 | uschar * modifier = *(field += cp->namelen) == ',' | |
1297 | ? ++field : NULL; | |
1298 | return (*cp->getfn)( *(void **)vp->value, modifier ); | |
1299 | } | |
9d1c15ef | 1300 | |
94431adb | 1301 | expand_string_message = |
9d1c15ef JH |
1302 | string_sprintf("bad field selector \"%s\" for certextract", field); |
1303 | return NULL; | |
1304 | } | |
1305 | #endif /*SUPPORT_TLS*/ | |
1306 | ||
059ec3d9 PH |
1307 | /************************************************* |
1308 | * Extract a substring from a string * | |
1309 | *************************************************/ | |
1310 | ||
1311 | /* Perform the ${substr or ${length expansion operations. | |
1312 | ||
1313 | Arguments: | |
1314 | subject the input string | |
1315 | value1 the offset from the start of the input string to the start of | |
1316 | the output string; if negative, count from the right. | |
1317 | value2 the length of the output string, or negative (-1) for unset | |
1318 | if value1 is positive, unset means "all after" | |
1319 | if value1 is negative, unset means "all before" | |
1320 | len set to the length of the returned string | |
1321 | ||
1322 | Returns: pointer to the output string, or NULL if there is an error | |
1323 | */ | |
1324 | ||
1325 | static uschar * | |
1326 | extract_substr(uschar *subject, int value1, int value2, int *len) | |
1327 | { | |
1328 | int sublen = Ustrlen(subject); | |
1329 | ||
1330 | if (value1 < 0) /* count from right */ | |
1331 | { | |
1332 | value1 += sublen; | |
1333 | ||
1334 | /* If the position is before the start, skip to the start, and adjust the | |
1335 | length. If the length ends up negative, the substring is null because nothing | |
1336 | can precede. This falls out naturally when the length is unset, meaning "all | |
1337 | to the left". */ | |
1338 | ||
1339 | if (value1 < 0) | |
1340 | { | |
1341 | value2 += value1; | |
1342 | if (value2 < 0) value2 = 0; | |
1343 | value1 = 0; | |
1344 | } | |
1345 | ||
1346 | /* Otherwise an unset length => characters before value1 */ | |
1347 | ||
1348 | else if (value2 < 0) | |
1349 | { | |
1350 | value2 = value1; | |
1351 | value1 = 0; | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | /* For a non-negative offset, if the starting position is past the end of the | |
1356 | string, the result will be the null string. Otherwise, an unset length means | |
1357 | "rest"; just set it to the maximum - it will be cut down below if necessary. */ | |
1358 | ||
1359 | else | |
1360 | { | |
1361 | if (value1 > sublen) | |
1362 | { | |
1363 | value1 = sublen; | |
1364 | value2 = 0; | |
1365 | } | |
1366 | else if (value2 < 0) value2 = sublen; | |
1367 | } | |
1368 | ||
1369 | /* Cut the length down to the maximum possible for the offset value, and get | |
1370 | the required characters. */ | |
1371 | ||
1372 | if (value1 + value2 > sublen) value2 = sublen - value1; | |
1373 | *len = value2; | |
1374 | return subject + value1; | |
1375 | } | |
1376 | ||
1377 | ||
1378 | ||
1379 | ||
1380 | /************************************************* | |
1381 | * Old-style hash of a string * | |
1382 | *************************************************/ | |
1383 | ||
1384 | /* Perform the ${hash expansion operation. | |
1385 | ||
1386 | Arguments: | |
1387 | subject the input string (an expanded substring) | |
1388 | value1 the length of the output string; if greater or equal to the | |
1389 | length of the input string, the input string is returned | |
1390 | value2 the number of hash characters to use, or 26 if negative | |
1391 | len set to the length of the returned string | |
1392 | ||
1393 | Returns: pointer to the output string, or NULL if there is an error | |
1394 | */ | |
1395 | ||
1396 | static uschar * | |
1397 | compute_hash(uschar *subject, int value1, int value2, int *len) | |
1398 | { | |
1399 | int sublen = Ustrlen(subject); | |
1400 | ||
1401 | if (value2 < 0) value2 = 26; | |
1402 | else if (value2 > Ustrlen(hashcodes)) | |
1403 | { | |
1404 | expand_string_message = | |
1405 | string_sprintf("hash count \"%d\" too big", value2); | |
1406 | return NULL; | |
1407 | } | |
1408 | ||
1409 | /* Calculate the hash text. We know it is shorter than the original string, so | |
1410 | can safely place it in subject[] (we know that subject is always itself an | |
1411 | expanded substring). */ | |
1412 | ||
1413 | if (value1 < sublen) | |
1414 | { | |
1415 | int c; | |
1416 | int i = 0; | |
1417 | int j = value1; | |
1418 | while ((c = (subject[j])) != 0) | |
1419 | { | |
1420 | int shift = (c + j++) & 7; | |
1421 | subject[i] ^= (c << shift) | (c >> (8-shift)); | |
1422 | if (++i >= value1) i = 0; | |
1423 | } | |
1424 | for (i = 0; i < value1; i++) | |
1425 | subject[i] = hashcodes[(subject[i]) % value2]; | |
1426 | } | |
1427 | else value1 = sublen; | |
1428 | ||
1429 | *len = value1; | |
1430 | return subject; | |
1431 | } | |
1432 | ||
1433 | ||
1434 | ||
1435 | ||
1436 | /************************************************* | |
1437 | * Numeric hash of a string * | |
1438 | *************************************************/ | |
1439 | ||
1440 | /* Perform the ${nhash expansion operation. The first characters of the | |
1441 | string are treated as most important, and get the highest prime numbers. | |
1442 | ||
1443 | Arguments: | |
1444 | subject the input string | |
1445 | value1 the maximum value of the first part of the result | |
1446 | value2 the maximum value of the second part of the result, | |
1447 | or negative to produce only a one-part result | |
1448 | len set to the length of the returned string | |
1449 | ||
1450 | Returns: pointer to the output string, or NULL if there is an error. | |
1451 | */ | |
1452 | ||
1453 | static uschar * | |
1454 | compute_nhash (uschar *subject, int value1, int value2, int *len) | |
1455 | { | |
1456 | uschar *s = subject; | |
1457 | int i = 0; | |
1458 | unsigned long int total = 0; /* no overflow */ | |
1459 | ||
1460 | while (*s != 0) | |
1461 | { | |
0539a19d | 1462 | if (i == 0) i = nelem(prime) - 1; |
059ec3d9 PH |
1463 | total += prime[i--] * (unsigned int)(*s++); |
1464 | } | |
1465 | ||
1466 | /* If value2 is unset, just compute one number */ | |
1467 | ||
1468 | if (value2 < 0) | |
1469 | { | |
1470 | s = string_sprintf("%d", total % value1); | |
1471 | } | |
1472 | ||
1473 | /* Otherwise do a div/mod hash */ | |
1474 | ||
1475 | else | |
1476 | { | |
1477 | total = total % (value1 * value2); | |
1478 | s = string_sprintf("%d/%d", total/value2, total % value2); | |
1479 | } | |
1480 | ||
1481 | *len = Ustrlen(s); | |
1482 | return s; | |
1483 | } | |
1484 | ||
1485 | ||
1486 | ||
1487 | ||
1488 | ||
1489 | /************************************************* | |
1490 | * Find the value of a header or headers * | |
1491 | *************************************************/ | |
1492 | ||
1493 | /* Multiple instances of the same header get concatenated, and this function | |
1494 | can also return a concatenation of all the header lines. When concatenating | |
1495 | specific headers that contain lists of addresses, a comma is inserted between | |
1496 | them. Otherwise we use a straight concatenation. Because some messages can have | |
1497 | pathologically large number of lines, there is a limit on the length that is | |
1498 | returned. Also, to avoid massive store use which would result from using | |
1499 | string_cat() as it copies and extends strings, we do a preliminary pass to find | |
1500 | out exactly how much store will be needed. On "normal" messages this will be | |
1501 | pretty trivial. | |
1502 | ||
1503 | Arguments: | |
1504 | name the name of the header, without the leading $header_ or $h_, | |
1505 | or NULL if a concatenation of all headers is required | |
1506 | exists_only TRUE if called from a def: test; don't need to build a string; | |
1507 | just return a string that is not "" and not "0" if the header | |
1508 | exists | |
1509 | newsize return the size of memory block that was obtained; may be NULL | |
1510 | if exists_only is TRUE | |
1511 | want_raw TRUE if called for $rh_ or $rheader_ variables; no processing, | |
ff75a1f7 PH |
1512 | other than concatenating, will be done on the header. Also used |
1513 | for $message_headers_raw. | |
059ec3d9 PH |
1514 | charset name of charset to translate MIME words to; used only if |
1515 | want_raw is false; if NULL, no translation is done (this is | |
1516 | used for $bh_ and $bheader_) | |
1517 | ||
1518 | Returns: NULL if the header does not exist, else a pointer to a new | |
1519 | store block | |
1520 | */ | |
1521 | ||
1522 | static uschar * | |
1523 | find_header(uschar *name, BOOL exists_only, int *newsize, BOOL want_raw, | |
1524 | uschar *charset) | |
1525 | { | |
1526 | BOOL found = name == NULL; | |
1527 | int comma = 0; | |
1528 | int len = found? 0 : Ustrlen(name); | |
1529 | int i; | |
1530 | uschar *yield = NULL; | |
1531 | uschar *ptr = NULL; | |
1532 | ||
1533 | /* Loop for two passes - saves code repetition */ | |
1534 | ||
1535 | for (i = 0; i < 2; i++) | |
1536 | { | |
1537 | int size = 0; | |
1538 | header_line *h; | |
1539 | ||
1540 | for (h = header_list; size < header_insert_maxlen && h != NULL; h = h->next) | |
1541 | { | |
1542 | if (h->type != htype_old && h->text != NULL) /* NULL => Received: placeholder */ | |
1543 | { | |
1544 | if (name == NULL || (len <= h->slen && strncmpic(name, h->text, len) == 0)) | |
1545 | { | |
1546 | int ilen; | |
1547 | uschar *t; | |
1548 | ||
1549 | if (exists_only) return US"1"; /* don't need actual string */ | |
1550 | found = TRUE; | |
1551 | t = h->text + len; /* text to insert */ | |
1552 | if (!want_raw) /* unless wanted raw, */ | |
1553 | while (isspace(*t)) t++; /* remove leading white space */ | |
1554 | ilen = h->slen - (t - h->text); /* length to insert */ | |
1555 | ||
fd700877 PH |
1556 | /* Unless wanted raw, remove trailing whitespace, including the |
1557 | newline. */ | |
1558 | ||
1559 | if (!want_raw) | |
1560 | while (ilen > 0 && isspace(t[ilen-1])) ilen--; | |
1561 | ||
059ec3d9 PH |
1562 | /* Set comma = 1 if handling a single header and it's one of those |
1563 | that contains an address list, except when asked for raw headers. Only | |
1564 | need to do this once. */ | |
1565 | ||
1566 | if (!want_raw && name != NULL && comma == 0 && | |
1567 | Ustrchr("BCFRST", h->type) != NULL) | |
1568 | comma = 1; | |
1569 | ||
1570 | /* First pass - compute total store needed; second pass - compute | |
1571 | total store used, including this header. */ | |
1572 | ||
fd700877 | 1573 | size += ilen + comma + 1; /* +1 for the newline */ |
059ec3d9 PH |
1574 | |
1575 | /* Second pass - concatentate the data, up to a maximum. Note that | |
1576 | the loop stops when size hits the limit. */ | |
1577 | ||
1578 | if (i != 0) | |
1579 | { | |
1580 | if (size > header_insert_maxlen) | |
1581 | { | |
fd700877 | 1582 | ilen -= size - header_insert_maxlen - 1; |
059ec3d9 PH |
1583 | comma = 0; |
1584 | } | |
1585 | Ustrncpy(ptr, t, ilen); | |
1586 | ptr += ilen; | |
fd700877 PH |
1587 | |
1588 | /* For a non-raw header, put in the comma if needed, then add | |
3168332a PH |
1589 | back the newline we removed above, provided there was some text in |
1590 | the header. */ | |
fd700877 | 1591 | |
3168332a | 1592 | if (!want_raw && ilen > 0) |
059ec3d9 | 1593 | { |
3168332a | 1594 | if (comma != 0) *ptr++ = ','; |
059ec3d9 PH |
1595 | *ptr++ = '\n'; |
1596 | } | |
1597 | } | |
1598 | } | |
1599 | } | |
1600 | } | |
1601 | ||
fd700877 PH |
1602 | /* At end of first pass, return NULL if no header found. Then truncate size |
1603 | if necessary, and get the buffer to hold the data, returning the buffer size. | |
1604 | */ | |
059ec3d9 PH |
1605 | |
1606 | if (i == 0) | |
1607 | { | |
1608 | if (!found) return NULL; | |
1609 | if (size > header_insert_maxlen) size = header_insert_maxlen; | |
1610 | *newsize = size + 1; | |
1611 | ptr = yield = store_get(*newsize); | |
1612 | } | |
1613 | } | |
1614 | ||
059ec3d9 PH |
1615 | /* That's all we do for raw header expansion. */ |
1616 | ||
1617 | if (want_raw) | |
1618 | { | |
1619 | *ptr = 0; | |
1620 | } | |
1621 | ||
fd700877 PH |
1622 | /* Otherwise, remove a final newline and a redundant added comma. Then we do |
1623 | RFC 2047 decoding, translating the charset if requested. The rfc2047_decode2() | |
059ec3d9 PH |
1624 | function can return an error with decoded data if the charset translation |
1625 | fails. If decoding fails, it returns NULL. */ | |
1626 | ||
1627 | else | |
1628 | { | |
1629 | uschar *decoded, *error; | |
3168332a | 1630 | if (ptr > yield && ptr[-1] == '\n') ptr--; |
fd700877 | 1631 | if (ptr > yield && comma != 0 && ptr[-1] == ',') ptr--; |
059ec3d9 | 1632 | *ptr = 0; |
a0d6ba8a PH |
1633 | decoded = rfc2047_decode2(yield, check_rfc2047_length, charset, '?', NULL, |
1634 | newsize, &error); | |
059ec3d9 PH |
1635 | if (error != NULL) |
1636 | { | |
1637 | DEBUG(D_any) debug_printf("*** error in RFC 2047 decoding: %s\n" | |
1638 | " input was: %s\n", error, yield); | |
1639 | } | |
1640 | if (decoded != NULL) yield = decoded; | |
1641 | } | |
1642 | ||
1643 | return yield; | |
1644 | } | |
1645 | ||
1646 | ||
1647 | ||
1648 | ||
362145b5 JH |
1649 | /************************************************* |
1650 | * Return list of recipients * | |
1651 | *************************************************/ | |
1652 | /* A recipients list is available only during system message filtering, | |
1653 | during ACL processing after DATA, and while expanding pipe commands | |
1654 | generated from a system filter, but not elsewhere. */ | |
1655 | ||
1656 | static uschar * | |
1657 | fn_recipients(void) | |
1658 | { | |
1659 | if (!enable_dollar_recipients) return NULL; else | |
1660 | { | |
1661 | int size = 128; | |
1662 | int ptr = 0; | |
1663 | int i; | |
1664 | uschar * s = store_get(size); | |
1665 | for (i = 0; i < recipients_count; i++) | |
1666 | { | |
1667 | if (i != 0) s = string_cat(s, &size, &ptr, US", ", 2); | |
1668 | s = string_cat(s, &size, &ptr, recipients_list[i].address, | |
1669 | Ustrlen(recipients_list[i].address)); | |
1670 | } | |
1671 | s[ptr] = 0; /* string_cat() leaves room */ | |
1672 | return s; | |
1673 | } | |
1674 | } | |
1675 | ||
1676 | ||
059ec3d9 PH |
1677 | /************************************************* |
1678 | * Find value of a variable * | |
1679 | *************************************************/ | |
1680 | ||
1681 | /* The table of variables is kept in alphabetic order, so we can search it | |
1682 | using a binary chop. The "choplen" variable is nothing to do with the binary | |
1683 | chop. | |
1684 | ||
1685 | Arguments: | |
1686 | name the name of the variable being sought | |
1687 | exists_only TRUE if this is a def: test; passed on to find_header() | |
1688 | skipping TRUE => skip any processing evaluation; this is not the same as | |
1689 | exists_only because def: may test for values that are first | |
1690 | evaluated here | |
1691 | newsize pointer to an int which is initially zero; if the answer is in | |
1692 | a new memory buffer, *newsize is set to its size | |
1693 | ||
1694 | Returns: NULL if the variable does not exist, or | |
1695 | a pointer to the variable's contents, or | |
1696 | something non-NULL if exists_only is TRUE | |
1697 | */ | |
1698 | ||
1699 | static uschar * | |
1700 | find_variable(uschar *name, BOOL exists_only, BOOL skipping, int *newsize) | |
1701 | { | |
9d1c15ef JH |
1702 | var_entry * vp; |
1703 | uschar *s, *domain; | |
1704 | uschar **ss; | |
1705 | void * val; | |
059ec3d9 | 1706 | |
38a0a95f PH |
1707 | /* Handle ACL variables, whose names are of the form acl_cxxx or acl_mxxx. |
1708 | Originally, xxx had to be a number in the range 0-9 (later 0-19), but from | |
1709 | release 4.64 onwards arbitrary names are permitted, as long as the first 5 | |
641cb756 PH |
1710 | characters are acl_c or acl_m and the sixth is either a digit or an underscore |
1711 | (this gave backwards compatibility at the changeover). There may be built-in | |
1712 | variables whose names start acl_ but they should never start in this way. This | |
1713 | slightly messy specification is a consequence of the history, needless to say. | |
47ca6d6c | 1714 | |
38a0a95f PH |
1715 | If an ACL variable does not exist, treat it as empty, unless strict_acl_vars is |
1716 | set, in which case give an error. */ | |
47ca6d6c | 1717 | |
641cb756 PH |
1718 | if ((Ustrncmp(name, "acl_c", 5) == 0 || Ustrncmp(name, "acl_m", 5) == 0) && |
1719 | !isalpha(name[5])) | |
38a0a95f PH |
1720 | { |
1721 | tree_node *node = | |
1722 | tree_search((name[4] == 'c')? acl_var_c : acl_var_m, name + 4); | |
1723 | return (node == NULL)? (strict_acl_vars? NULL : US"") : node->data.ptr; | |
47ca6d6c PH |
1724 | } |
1725 | ||
38a0a95f | 1726 | /* Handle $auth<n> variables. */ |
f78eb7c6 PH |
1727 | |
1728 | if (Ustrncmp(name, "auth", 4) == 0) | |
1729 | { | |
1730 | uschar *endptr; | |
1731 | int n = Ustrtoul(name + 4, &endptr, 10); | |
1732 | if (*endptr == 0 && n != 0 && n <= AUTH_VARS) | |
f38917cc JH |
1733 | return !auth_vars[n-1] ? US"" : auth_vars[n-1]; |
1734 | } | |
1735 | else if (Ustrncmp(name, "regex", 5) == 0) | |
1736 | { | |
1737 | uschar *endptr; | |
1738 | int n = Ustrtoul(name + 5, &endptr, 10); | |
1739 | if (*endptr == 0 && n != 0 && n <= REGEX_VARS) | |
1740 | return !regex_vars[n-1] ? US"" : regex_vars[n-1]; | |
f78eb7c6 PH |
1741 | } |
1742 | ||
47ca6d6c PH |
1743 | /* For all other variables, search the table */ |
1744 | ||
9d1c15ef JH |
1745 | if (!(vp = find_var_ent(name))) |
1746 | return NULL; /* Unknown variable name */ | |
059ec3d9 | 1747 | |
9d1c15ef JH |
1748 | /* Found an existing variable. If in skipping state, the value isn't needed, |
1749 | and we want to avoid processing (such as looking up the host name). */ | |
059ec3d9 | 1750 | |
9d1c15ef JH |
1751 | if (skipping) |
1752 | return US""; | |
059ec3d9 | 1753 | |
9d1c15ef JH |
1754 | val = vp->value; |
1755 | switch (vp->type) | |
1756 | { | |
1757 | case vtype_filter_int: | |
1758 | if (!filter_running) return NULL; | |
1759 | /* Fall through */ | |
1760 | /* VVVVVVVVVVVV */ | |
1761 | case vtype_int: | |
1762 | sprintf(CS var_buffer, "%d", *(int *)(val)); /* Integer */ | |
1763 | return var_buffer; | |
1764 | ||
1765 | case vtype_ino: | |
1766 | sprintf(CS var_buffer, "%ld", (long int)(*(ino_t *)(val))); /* Inode */ | |
1767 | return var_buffer; | |
1768 | ||
1769 | case vtype_gid: | |
1770 | sprintf(CS var_buffer, "%ld", (long int)(*(gid_t *)(val))); /* gid */ | |
1771 | return var_buffer; | |
1772 | ||
1773 | case vtype_uid: | |
1774 | sprintf(CS var_buffer, "%ld", (long int)(*(uid_t *)(val))); /* uid */ | |
1775 | return var_buffer; | |
1776 | ||
1777 | case vtype_bool: | |
1778 | sprintf(CS var_buffer, "%s", *(BOOL *)(val) ? "yes" : "no"); /* bool */ | |
1779 | return var_buffer; | |
1780 | ||
1781 | case vtype_stringptr: /* Pointer to string */ | |
1782 | s = *((uschar **)(val)); | |
1783 | return (s == NULL)? US"" : s; | |
1784 | ||
1785 | case vtype_pid: | |
1786 | sprintf(CS var_buffer, "%d", (int)getpid()); /* pid */ | |
1787 | return var_buffer; | |
1788 | ||
1789 | case vtype_load_avg: | |
1790 | sprintf(CS var_buffer, "%d", OS_GETLOADAVG()); /* load_average */ | |
1791 | return var_buffer; | |
1792 | ||
1793 | case vtype_host_lookup: /* Lookup if not done so */ | |
1794 | if (sender_host_name == NULL && sender_host_address != NULL && | |
1795 | !host_lookup_failed && host_name_lookup() == OK) | |
1796 | host_build_sender_fullhost(); | |
1797 | return (sender_host_name == NULL)? US"" : sender_host_name; | |
1798 | ||
1799 | case vtype_localpart: /* Get local part from address */ | |
1800 | s = *((uschar **)(val)); | |
1801 | if (s == NULL) return US""; | |
1802 | domain = Ustrrchr(s, '@'); | |
1803 | if (domain == NULL) return s; | |
1804 | if (domain - s > sizeof(var_buffer) - 1) | |
1805 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "local part longer than " SIZE_T_FMT | |
1806 | " in string expansion", sizeof(var_buffer)); | |
1807 | Ustrncpy(var_buffer, s, domain - s); | |
1808 | var_buffer[domain - s] = 0; | |
1809 | return var_buffer; | |
1810 | ||
1811 | case vtype_domain: /* Get domain from address */ | |
1812 | s = *((uschar **)(val)); | |
1813 | if (s == NULL) return US""; | |
1814 | domain = Ustrrchr(s, '@'); | |
1815 | return (domain == NULL)? US"" : domain + 1; | |
1816 | ||
1817 | case vtype_msgheaders: | |
1818 | return find_header(NULL, exists_only, newsize, FALSE, NULL); | |
1819 | ||
1820 | case vtype_msgheaders_raw: | |
1821 | return find_header(NULL, exists_only, newsize, TRUE, NULL); | |
1822 | ||
1823 | case vtype_msgbody: /* Pointer to msgbody string */ | |
1824 | case vtype_msgbody_end: /* Ditto, the end of the msg */ | |
1825 | ss = (uschar **)(val); | |
1826 | if (*ss == NULL && deliver_datafile >= 0) /* Read body when needed */ | |
059ec3d9 | 1827 | { |
9d1c15ef JH |
1828 | uschar *body; |
1829 | off_t start_offset = SPOOL_DATA_START_OFFSET; | |
1830 | int len = message_body_visible; | |
1831 | if (len > message_size) len = message_size; | |
1832 | *ss = body = store_malloc(len+1); | |
1833 | body[0] = 0; | |
1834 | if (vp->type == vtype_msgbody_end) | |
059ec3d9 | 1835 | { |
9d1c15ef JH |
1836 | struct stat statbuf; |
1837 | if (fstat(deliver_datafile, &statbuf) == 0) | |
1838 | { | |
1839 | start_offset = statbuf.st_size - len; | |
1840 | if (start_offset < SPOOL_DATA_START_OFFSET) | |
1841 | start_offset = SPOOL_DATA_START_OFFSET; | |
1842 | } | |
1843 | } | |
1844 | lseek(deliver_datafile, start_offset, SEEK_SET); | |
1845 | len = read(deliver_datafile, body, len); | |
1846 | if (len > 0) | |
1847 | { | |
1848 | body[len] = 0; | |
1849 | if (message_body_newlines) /* Separate loops for efficiency */ | |
1850 | { | |
1851 | while (len > 0) | |
1852 | { if (body[--len] == 0) body[len] = ' '; } | |
1853 | } | |
1854 | else | |
1855 | { | |
1856 | while (len > 0) | |
1857 | { if (body[--len] == '\n' || body[len] == 0) body[len] = ' '; } | |
1858 | } | |
059ec3d9 | 1859 | } |
9d1c15ef JH |
1860 | } |
1861 | return (*ss == NULL)? US"" : *ss; | |
059ec3d9 | 1862 | |
9d1c15ef JH |
1863 | case vtype_todbsdin: /* BSD inbox time of day */ |
1864 | return tod_stamp(tod_bsdin); | |
059ec3d9 | 1865 | |
9d1c15ef JH |
1866 | case vtype_tode: /* Unix epoch time of day */ |
1867 | return tod_stamp(tod_epoch); | |
059ec3d9 | 1868 | |
9d1c15ef JH |
1869 | case vtype_todel: /* Unix epoch/usec time of day */ |
1870 | return tod_stamp(tod_epoch_l); | |
f5787926 | 1871 | |
9d1c15ef JH |
1872 | case vtype_todf: /* Full time of day */ |
1873 | return tod_stamp(tod_full); | |
059ec3d9 | 1874 | |
9d1c15ef JH |
1875 | case vtype_todl: /* Log format time of day */ |
1876 | return tod_stamp(tod_log_bare); /* (without timezone) */ | |
059ec3d9 | 1877 | |
9d1c15ef JH |
1878 | case vtype_todzone: /* Time zone offset only */ |
1879 | return tod_stamp(tod_zone); | |
059ec3d9 | 1880 | |
9d1c15ef JH |
1881 | case vtype_todzulu: /* Zulu time */ |
1882 | return tod_stamp(tod_zulu); | |
059ec3d9 | 1883 | |
9d1c15ef JH |
1884 | case vtype_todlf: /* Log file datestamp tod */ |
1885 | return tod_stamp(tod_log_datestamp_daily); | |
059ec3d9 | 1886 | |
9d1c15ef JH |
1887 | case vtype_reply: /* Get reply address */ |
1888 | s = find_header(US"reply-to:", exists_only, newsize, TRUE, | |
1889 | headers_charset); | |
1890 | if (s != NULL) while (isspace(*s)) s++; | |
1891 | if (s == NULL || *s == 0) | |
1892 | { | |
1893 | *newsize = 0; /* For the *s==0 case */ | |
1894 | s = find_header(US"from:", exists_only, newsize, TRUE, headers_charset); | |
1895 | } | |
1896 | if (s != NULL) | |
1897 | { | |
1898 | uschar *t; | |
1899 | while (isspace(*s)) s++; | |
1900 | for (t = s; *t != 0; t++) if (*t == '\n') *t = ' '; | |
1901 | while (t > s && isspace(t[-1])) t--; | |
1902 | *t = 0; | |
1903 | } | |
1904 | return (s == NULL)? US"" : s; | |
059ec3d9 | 1905 | |
9d1c15ef JH |
1906 | case vtype_string_func: |
1907 | { | |
1908 | uschar * (*fn)() = val; | |
1909 | return fn(); | |
1910 | } | |
8e669ac1 | 1911 | |
9d1c15ef JH |
1912 | case vtype_pspace: |
1913 | { | |
1914 | int inodes; | |
1915 | sprintf(CS var_buffer, "%d", | |
1916 | receive_statvfs(val == (void *)TRUE, &inodes)); | |
1917 | } | |
1918 | return var_buffer; | |
8e669ac1 | 1919 | |
9d1c15ef JH |
1920 | case vtype_pinodes: |
1921 | { | |
1922 | int inodes; | |
1923 | (void) receive_statvfs(val == (void *)TRUE, &inodes); | |
1924 | sprintf(CS var_buffer, "%d", inodes); | |
1925 | } | |
1926 | return var_buffer; | |
80a47a2c | 1927 | |
9d1c15ef JH |
1928 | case vtype_cert: |
1929 | return *(void **)val ? US"<cert>" : US""; | |
80a47a2c | 1930 | |
9d1c15ef JH |
1931 | #ifndef DISABLE_DKIM |
1932 | case vtype_dkim: | |
1933 | return dkim_exim_expand_query((int)(long)val); | |
1934 | #endif | |
059ec3d9 | 1935 | |
9d1c15ef | 1936 | } |
6c08476d LM |
1937 | |
1938 | return NULL; /* Unknown variable. Silences static checkers. */ | |
059ec3d9 PH |
1939 | } |
1940 | ||
1941 | ||
1942 | ||
1943 | ||
d9b2312b JH |
1944 | void |
1945 | modify_variable(uschar *name, void * value) | |
1946 | { | |
9d1c15ef JH |
1947 | var_entry * vp; |
1948 | if ((vp = find_var_ent(name))) vp->value = value; | |
d9b2312b JH |
1949 | return; /* Unknown variable name, fail silently */ |
1950 | } | |
1951 | ||
1952 | ||
1953 | ||
1954 | ||
1955 | ||
059ec3d9 PH |
1956 | /************************************************* |
1957 | * Read and expand substrings * | |
1958 | *************************************************/ | |
1959 | ||
1960 | /* This function is called to read and expand argument substrings for various | |
1961 | expansion items. Some have a minimum requirement that is less than the maximum; | |
1962 | in these cases, the first non-present one is set to NULL. | |
1963 | ||
1964 | Arguments: | |
1965 | sub points to vector of pointers to set | |
1966 | n maximum number of substrings | |
1967 | m minimum required | |
1968 | sptr points to current string pointer | |
1969 | skipping the skipping flag | |
1970 | check_end if TRUE, check for final '}' | |
1971 | name name of item, for error message | |
b0e85a8f JH |
1972 | resetok if not NULL, pointer to flag - write FALSE if unsafe to reset |
1973 | the store. | |
059ec3d9 PH |
1974 | |
1975 | Returns: 0 OK; string pointer updated | |
1976 | 1 curly bracketing error (too few arguments) | |
1977 | 2 too many arguments (only if check_end is set); message set | |
1978 | 3 other error (expansion failure) | |
1979 | */ | |
1980 | ||
1981 | static int | |
55414b25 | 1982 | read_subs(uschar **sub, int n, int m, const uschar **sptr, BOOL skipping, |
b0e85a8f | 1983 | BOOL check_end, uschar *name, BOOL *resetok) |
059ec3d9 PH |
1984 | { |
1985 | int i; | |
55414b25 | 1986 | const uschar *s = *sptr; |
059ec3d9 PH |
1987 | |
1988 | while (isspace(*s)) s++; | |
1989 | for (i = 0; i < n; i++) | |
1990 | { | |
1991 | if (*s != '{') | |
1992 | { | |
1993 | if (i < m) return 1; | |
1994 | sub[i] = NULL; | |
1995 | break; | |
1996 | } | |
b0e85a8f | 1997 | sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, resetok); |
059ec3d9 PH |
1998 | if (sub[i] == NULL) return 3; |
1999 | if (*s++ != '}') return 1; | |
2000 | while (isspace(*s)) s++; | |
2001 | } | |
2002 | if (check_end && *s++ != '}') | |
2003 | { | |
2004 | if (s[-1] == '{') | |
2005 | { | |
2006 | expand_string_message = string_sprintf("Too many arguments for \"%s\" " | |
2007 | "(max is %d)", name, n); | |
2008 | return 2; | |
2009 | } | |
2010 | return 1; | |
2011 | } | |
2012 | ||
2013 | *sptr = s; | |
2014 | return 0; | |
2015 | } | |
2016 | ||
2017 | ||
2018 | ||
2019 | ||
641cb756 PH |
2020 | /************************************************* |
2021 | * Elaborate message for bad variable * | |
2022 | *************************************************/ | |
2023 | ||
2024 | /* For the "unknown variable" message, take a look at the variable's name, and | |
2025 | give additional information about possible ACL variables. The extra information | |
2026 | is added on to expand_string_message. | |
2027 | ||
2028 | Argument: the name of the variable | |
2029 | Returns: nothing | |
2030 | */ | |
2031 | ||
2032 | static void | |
2033 | check_variable_error_message(uschar *name) | |
2034 | { | |
2035 | if (Ustrncmp(name, "acl_", 4) == 0) | |
2036 | expand_string_message = string_sprintf("%s (%s)", expand_string_message, | |
2037 | (name[4] == 'c' || name[4] == 'm')? | |
2038 | (isalpha(name[5])? | |
2039 | US"6th character of a user-defined ACL variable must be a digit or underscore" : | |
2040 | US"strict_acl_vars is set" /* Syntax is OK, it has to be this */ | |
2041 | ) : | |
2042 | US"user-defined ACL variables must start acl_c or acl_m"); | |
2043 | } | |
2044 | ||
2045 | ||
2046 | ||
f60d98e8 JH |
2047 | /* |
2048 | Load args from sub array to globals, and call acl_check(). | |
ef21c07d | 2049 | Sub array will be corrupted on return. |
f60d98e8 JH |
2050 | |
2051 | Returns: OK access is granted by an ACCEPT verb | |
2052 | DISCARD access is granted by a DISCARD verb | |
2053 | FAIL access is denied | |
2054 | FAIL_DROP access is denied; drop the connection | |
2055 | DEFER can't tell at the moment | |
2056 | ERROR disaster | |
2057 | */ | |
2058 | static int | |
2059 | eval_acl(uschar ** sub, int nsub, uschar ** user_msgp) | |
2060 | { | |
2061 | int i; | |
ef21c07d JH |
2062 | int sav_narg = acl_narg; |
2063 | int ret; | |
93a6fce2 | 2064 | uschar * dummy_logmsg; |
faa05a93 | 2065 | extern int acl_where; |
f60d98e8 | 2066 | |
0539a19d | 2067 | if(--nsub > nelem(acl_arg)) nsub = nelem(acl_arg); |
ef21c07d JH |
2068 | for (i = 0; i < nsub && sub[i+1]; i++) |
2069 | { | |
93a6fce2 | 2070 | uschar * tmp = acl_arg[i]; |
ef21c07d JH |
2071 | acl_arg[i] = sub[i+1]; /* place callers args in the globals */ |
2072 | sub[i+1] = tmp; /* stash the old args using our caller's storage */ | |
2073 | } | |
2074 | acl_narg = i; | |
bef3ea7f | 2075 | while (i < nsub) |
ef21c07d JH |
2076 | { |
2077 | sub[i+1] = acl_arg[i]; | |
2078 | acl_arg[i++] = NULL; | |
2079 | } | |
f60d98e8 JH |
2080 | |
2081 | DEBUG(D_expand) | |
2082 | debug_printf("expanding: acl: %s arg: %s%s\n", | |
2083 | sub[0], | |
60f8e1e8 JH |
2084 | acl_narg>0 ? acl_arg[0] : US"<none>", |
2085 | acl_narg>1 ? " +more" : ""); | |
f60d98e8 | 2086 | |
93a6fce2 | 2087 | ret = acl_eval(acl_where, sub[0], user_msgp, &dummy_logmsg); |
ef21c07d JH |
2088 | |
2089 | for (i = 0; i < nsub; i++) | |
2090 | acl_arg[i] = sub[i+1]; /* restore old args */ | |
2091 | acl_narg = sav_narg; | |
2092 | ||
2093 | return ret; | |
f60d98e8 JH |
2094 | } |
2095 | ||
2096 | ||
2097 | ||
2098 | ||
059ec3d9 PH |
2099 | /************************************************* |
2100 | * Read and evaluate a condition * | |
2101 | *************************************************/ | |
2102 | ||
2103 | /* | |
2104 | Arguments: | |
2105 | s points to the start of the condition text | |
b0e85a8f JH |
2106 | resetok points to a BOOL which is written false if it is unsafe to |
2107 | free memory. Certain condition types (acl) may have side-effect | |
2108 | allocation which must be preserved. | |
059ec3d9 PH |
2109 | yield points to a BOOL to hold the result of the condition test; |
2110 | if NULL, we are just reading through a condition that is | |
2111 | part of an "or" combination to check syntax, or in a state | |
2112 | where the answer isn't required | |
2113 | ||
2114 | Returns: a pointer to the first character after the condition, or | |
2115 | NULL after an error | |
2116 | */ | |
2117 | ||
55414b25 JH |
2118 | static const uschar * |
2119 | eval_condition(const uschar *s, BOOL *resetok, BOOL *yield) | |
059ec3d9 PH |
2120 | { |
2121 | BOOL testfor = TRUE; | |
2122 | BOOL tempcond, combined_cond; | |
2123 | BOOL *subcondptr; | |
5cfd2e57 | 2124 | BOOL sub2_honour_dollar = TRUE; |
059ec3d9 | 2125 | int i, rc, cond_type, roffset; |
97d17305 | 2126 | int_eximarith_t num[2]; |
059ec3d9 PH |
2127 | struct stat statbuf; |
2128 | uschar name[256]; | |
55414b25 | 2129 | const uschar *sub[10]; |
059ec3d9 PH |
2130 | |
2131 | const pcre *re; | |
2132 | const uschar *rerror; | |
2133 | ||
2134 | for (;;) | |
2135 | { | |
2136 | while (isspace(*s)) s++; | |
2137 | if (*s == '!') { testfor = !testfor; s++; } else break; | |
2138 | } | |
2139 | ||
2140 | /* Numeric comparisons are symbolic */ | |
2141 | ||
2142 | if (*s == '=' || *s == '>' || *s == '<') | |
2143 | { | |
2144 | int p = 0; | |
2145 | name[p++] = *s++; | |
2146 | if (*s == '=') | |
2147 | { | |
2148 | name[p++] = '='; | |
2149 | s++; | |
2150 | } | |
2151 | name[p] = 0; | |
2152 | } | |
2153 | ||
2154 | /* All other conditions are named */ | |
2155 | ||
2156 | else s = read_name(name, 256, s, US"_"); | |
2157 | ||
2158 | /* If we haven't read a name, it means some non-alpha character is first. */ | |
2159 | ||
2160 | if (name[0] == 0) | |
2161 | { | |
2162 | expand_string_message = string_sprintf("condition name expected, " | |
2163 | "but found \"%.16s\"", s); | |
2164 | return NULL; | |
2165 | } | |
2166 | ||
2167 | /* Find which condition we are dealing with, and switch on it */ | |
2168 | ||
0539a19d | 2169 | cond_type = chop_match(name, cond_table, nelem(cond_table)); |
059ec3d9 PH |
2170 | switch(cond_type) |
2171 | { | |
9b4768fa PH |
2172 | /* def: tests for a non-empty variable, or for the existence of a header. If |
2173 | yield == NULL we are in a skipping state, and don't care about the answer. */ | |
059ec3d9 PH |
2174 | |
2175 | case ECOND_DEF: | |
2176 | if (*s != ':') | |
2177 | { | |
2178 | expand_string_message = US"\":\" expected after \"def\""; | |
2179 | return NULL; | |
2180 | } | |
2181 | ||
2182 | s = read_name(name, 256, s+1, US"_"); | |
2183 | ||
0d85fa3f PH |
2184 | /* Test for a header's existence. If the name contains a closing brace |
2185 | character, this may be a user error where the terminating colon has been | |
2186 | omitted. Set a flag to adjust a subsequent error message in this case. */ | |
059ec3d9 PH |
2187 | |
2188 | if (Ustrncmp(name, "h_", 2) == 0 || | |
2189 | Ustrncmp(name, "rh_", 3) == 0 || | |
2190 | Ustrncmp(name, "bh_", 3) == 0 || | |
2191 | Ustrncmp(name, "header_", 7) == 0 || | |
2192 | Ustrncmp(name, "rheader_", 8) == 0 || | |
2193 | Ustrncmp(name, "bheader_", 8) == 0) | |
2194 | { | |
2195 | s = read_header_name(name, 256, s); | |
b5b871ac | 2196 | /* {-for-text-editors */ |
0d85fa3f | 2197 | if (Ustrchr(name, '}') != NULL) malformed_header = TRUE; |
059ec3d9 PH |
2198 | if (yield != NULL) *yield = |
2199 | (find_header(name, TRUE, NULL, FALSE, NULL) != NULL) == testfor; | |
2200 | } | |
2201 | ||
9b4768fa PH |
2202 | /* Test for a variable's having a non-empty value. A non-existent variable |
2203 | causes an expansion failure. */ | |
059ec3d9 PH |
2204 | |
2205 | else | |
2206 | { | |
2207 | uschar *value = find_variable(name, TRUE, yield == NULL, NULL); | |
2208 | if (value == NULL) | |
2209 | { | |
2210 | expand_string_message = (name[0] == 0)? | |
2211 | string_sprintf("variable name omitted after \"def:\"") : | |
2212 | string_sprintf("unknown variable \"%s\" after \"def:\"", name); | |
641cb756 | 2213 | check_variable_error_message(name); |
059ec3d9 PH |
2214 | return NULL; |
2215 | } | |
9b4768fa | 2216 | if (yield != NULL) *yield = (value[0] != 0) == testfor; |
059ec3d9 PH |
2217 | } |
2218 | ||
2219 | return s; | |
2220 | ||
2221 | ||
2222 | /* first_delivery tests for first delivery attempt */ | |
2223 | ||
2224 | case ECOND_FIRST_DELIVERY: | |
2225 | if (yield != NULL) *yield = deliver_firsttime == testfor; | |
2226 | return s; | |
2227 | ||
2228 | ||
2229 | /* queue_running tests for any process started by a queue runner */ | |
2230 | ||
2231 | case ECOND_QUEUE_RUNNING: | |
2232 | if (yield != NULL) *yield = (queue_run_pid != (pid_t)0) == testfor; | |
2233 | return s; | |
2234 | ||
2235 | ||
2236 | /* exists: tests for file existence | |
2237 | isip: tests for any IP address | |
2238 | isip4: tests for an IPv4 address | |
2239 | isip6: tests for an IPv6 address | |
2240 | pam: does PAM authentication | |
2241 | radius: does RADIUS authentication | |
2242 | ldapauth: does LDAP authentication | |
2243 | pwcheck: does Cyrus SASL pwcheck authentication | |
2244 | */ | |
2245 | ||
2246 | case ECOND_EXISTS: | |
2247 | case ECOND_ISIP: | |
2248 | case ECOND_ISIP4: | |
2249 | case ECOND_ISIP6: | |
2250 | case ECOND_PAM: | |
2251 | case ECOND_RADIUS: | |
2252 | case ECOND_LDAPAUTH: | |
2253 | case ECOND_PWCHECK: | |
2254 | ||
2255 | while (isspace(*s)) s++; | |
b5b871ac | 2256 | if (*s != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
059ec3d9 | 2257 | |
b0e85a8f | 2258 | sub[0] = expand_string_internal(s+1, TRUE, &s, yield == NULL, TRUE, resetok); |
059ec3d9 | 2259 | if (sub[0] == NULL) return NULL; |
b5b871ac | 2260 | /* {-for-text-editors */ |
059ec3d9 PH |
2261 | if (*s++ != '}') goto COND_FAILED_CURLY_END; |
2262 | ||
2263 | if (yield == NULL) return s; /* No need to run the test if skipping */ | |
2264 | ||
2265 | switch(cond_type) | |
2266 | { | |
2267 | case ECOND_EXISTS: | |
2268 | if ((expand_forbid & RDO_EXISTS) != 0) | |
2269 | { | |
2270 | expand_string_message = US"File existence tests are not permitted"; | |
2271 | return NULL; | |
2272 | } | |
2273 | *yield = (Ustat(sub[0], &statbuf) == 0) == testfor; | |
2274 | break; | |
2275 | ||
2276 | case ECOND_ISIP: | |
2277 | case ECOND_ISIP4: | |
2278 | case ECOND_ISIP6: | |
2279 | rc = string_is_ip_address(sub[0], NULL); | |
7e66e54d | 2280 | *yield = ((cond_type == ECOND_ISIP)? (rc != 0) : |
059ec3d9 PH |
2281 | (cond_type == ECOND_ISIP4)? (rc == 4) : (rc == 6)) == testfor; |
2282 | break; | |
2283 | ||
2284 | /* Various authentication tests - all optionally compiled */ | |
2285 | ||
2286 | case ECOND_PAM: | |
2287 | #ifdef SUPPORT_PAM | |
2288 | rc = auth_call_pam(sub[0], &expand_string_message); | |
2289 | goto END_AUTH; | |
2290 | #else | |
2291 | goto COND_FAILED_NOT_COMPILED; | |
2292 | #endif /* SUPPORT_PAM */ | |
2293 | ||
2294 | case ECOND_RADIUS: | |
2295 | #ifdef RADIUS_CONFIG_FILE | |
2296 | rc = auth_call_radius(sub[0], &expand_string_message); | |
2297 | goto END_AUTH; | |
2298 | #else | |
2299 | goto COND_FAILED_NOT_COMPILED; | |
2300 | #endif /* RADIUS_CONFIG_FILE */ | |
2301 | ||
2302 | case ECOND_LDAPAUTH: | |
2303 | #ifdef LOOKUP_LDAP | |
2304 | { | |
2305 | /* Just to keep the interface the same */ | |
2306 | BOOL do_cache; | |
2307 | int old_pool = store_pool; | |
2308 | store_pool = POOL_SEARCH; | |
2309 | rc = eldapauth_find((void *)(-1), NULL, sub[0], Ustrlen(sub[0]), NULL, | |
2310 | &expand_string_message, &do_cache); | |
2311 | store_pool = old_pool; | |
2312 | } | |
2313 | goto END_AUTH; | |
2314 | #else | |
2315 | goto COND_FAILED_NOT_COMPILED; | |
2316 | #endif /* LOOKUP_LDAP */ | |
2317 | ||
2318 | case ECOND_PWCHECK: | |
2319 | #ifdef CYRUS_PWCHECK_SOCKET | |
2320 | rc = auth_call_pwcheck(sub[0], &expand_string_message); | |
2321 | goto END_AUTH; | |
2322 | #else | |
2323 | goto COND_FAILED_NOT_COMPILED; | |
2324 | #endif /* CYRUS_PWCHECK_SOCKET */ | |
2325 | ||
2326 | #if defined(SUPPORT_PAM) || defined(RADIUS_CONFIG_FILE) || \ | |
2327 | defined(LOOKUP_LDAP) || defined(CYRUS_PWCHECK_SOCKET) | |
2328 | END_AUTH: | |
2329 | if (rc == ERROR || rc == DEFER) return NULL; | |
2330 | *yield = (rc == OK) == testfor; | |
2331 | #endif | |
2332 | } | |
2333 | return s; | |
2334 | ||
2335 | ||
333eea9c JH |
2336 | /* call ACL (in a conditional context). Accept true, deny false. |
2337 | Defer is a forced-fail. Anything set by message= goes to $value. | |
f60d98e8 JH |
2338 | Up to ten parameters are used; we use the braces round the name+args |
2339 | like the saslauthd condition does, to permit a variable number of args. | |
2340 | See also the expansion-item version EITEM_ACL and the traditional | |
2341 | acl modifier ACLC_ACL. | |
fd5dad68 JH |
2342 | Since the ACL may allocate new global variables, tell our caller to not |
2343 | reclaim memory. | |
f60d98e8 | 2344 | */ |
333eea9c JH |
2345 | |
2346 | case ECOND_ACL: | |
bef3ea7f | 2347 | /* ${if acl {{name}{arg1}{arg2}...} {yes}{no}} */ |
333eea9c | 2348 | { |
55414b25 | 2349 | uschar *sub[10]; |
333eea9c | 2350 | uschar *user_msg; |
333eea9c | 2351 | BOOL cond = FALSE; |
bef3ea7f JH |
2352 | int size = 0; |
2353 | int ptr = 0; | |
333eea9c JH |
2354 | |
2355 | while (isspace(*s)) s++; | |
6d9cfc47 | 2356 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /*}*/ |
333eea9c | 2357 | |
0539a19d | 2358 | switch(read_subs(sub, nelem(sub), 1, |
b0e85a8f | 2359 | &s, yield == NULL, TRUE, US"acl", resetok)) |
333eea9c | 2360 | { |
f60d98e8 JH |
2361 | case 1: expand_string_message = US"too few arguments or bracketing " |
2362 | "error for acl"; | |
2363 | case 2: | |
2364 | case 3: return NULL; | |
333eea9c | 2365 | } |
f60d98e8 | 2366 | |
b0e85a8f | 2367 | *resetok = FALSE; |
0539a19d | 2368 | if (yield != NULL) switch(eval_acl(sub, nelem(sub), &user_msg)) |
f60d98e8 JH |
2369 | { |
2370 | case OK: | |
2371 | cond = TRUE; | |
2372 | case FAIL: | |
bef3ea7f | 2373 | lookup_value = NULL; |
f60d98e8 | 2374 | if (user_msg) |
bef3ea7f | 2375 | { |
f60d98e8 | 2376 | lookup_value = string_cat(NULL, &size, &ptr, user_msg, Ustrlen(user_msg)); |
bef3ea7f JH |
2377 | lookup_value[ptr] = '\0'; |
2378 | } | |
b5b871ac | 2379 | *yield = cond == testfor; |
f60d98e8 JH |
2380 | break; |
2381 | ||
2382 | case DEFER: | |
2383 | expand_string_forcedfail = TRUE; | |
2384 | default: | |
2385 | expand_string_message = string_sprintf("error from acl \"%s\"", sub[0]); | |
2386 | return NULL; | |
2387 | } | |
2388 | return s; | |
333eea9c | 2389 | } |
333eea9c JH |
2390 | |
2391 | ||
059ec3d9 PH |
2392 | /* saslauthd: does Cyrus saslauthd authentication. Four parameters are used: |
2393 | ||
b0e85a8f | 2394 | ${if saslauthd {{username}{password}{service}{realm}} {yes}{no}} |
059ec3d9 PH |
2395 | |
2396 | However, the last two are optional. That is why the whole set is enclosed | |
333eea9c | 2397 | in their own set of braces. */ |
059ec3d9 PH |
2398 | |
2399 | case ECOND_SASLAUTHD: | |
0539a19d JH |
2400 | #ifndef CYRUS_SASLAUTHD_SOCKET |
2401 | goto COND_FAILED_NOT_COMPILED; | |
2402 | #else | |
059ec3d9 | 2403 | { |
0539a19d JH |
2404 | uschar *sub[4]; |
2405 | while (isspace(*s)) s++; | |
2406 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ | |
2407 | switch(read_subs(sub, nelem(sub), 2, &s, yield == NULL, TRUE, US"saslauthd", | |
2408 | resetok)) | |
2409 | { | |
2410 | case 1: expand_string_message = US"too few arguments or bracketing " | |
2411 | "error for saslauthd"; | |
2412 | case 2: | |
2413 | case 3: return NULL; | |
2414 | } | |
2415 | if (sub[2] == NULL) sub[3] = NULL; /* realm if no service */ | |
2416 | if (yield != NULL) | |
2417 | { | |
2418 | int rc = auth_call_saslauthd(sub[0], sub[1], sub[2], sub[3], | |
2419 | &expand_string_message); | |
2420 | if (rc == ERROR || rc == DEFER) return NULL; | |
2421 | *yield = (rc == OK) == testfor; | |
2422 | } | |
2423 | return s; | |
059ec3d9 | 2424 | } |
0539a19d | 2425 | #endif /* CYRUS_SASLAUTHD_SOCKET */ |
059ec3d9 PH |
2426 | |
2427 | ||
2428 | /* symbolic operators for numeric and string comparison, and a number of | |
2429 | other operators, all requiring two arguments. | |
2430 | ||
76dca828 PP |
2431 | crypteq: encrypts plaintext and compares against an encrypted text, |
2432 | using crypt(), crypt16(), MD5 or SHA-1 | |
2433 | inlist/inlisti: checks if first argument is in the list of the second | |
059ec3d9 PH |
2434 | match: does a regular expression match and sets up the numerical |
2435 | variables if it succeeds | |
2436 | match_address: matches in an address list | |
2437 | match_domain: matches in a domain list | |
32d668a5 | 2438 | match_ip: matches a host list that is restricted to IP addresses |
059ec3d9 | 2439 | match_local_part: matches in a local part list |
059ec3d9 PH |
2440 | */ |
2441 | ||
059ec3d9 PH |
2442 | case ECOND_MATCH_ADDRESS: |
2443 | case ECOND_MATCH_DOMAIN: | |
32d668a5 | 2444 | case ECOND_MATCH_IP: |
059ec3d9 | 2445 | case ECOND_MATCH_LOCAL_PART: |
da6dbe26 PP |
2446 | #ifndef EXPAND_LISTMATCH_RHS |
2447 | sub2_honour_dollar = FALSE; | |
2448 | #endif | |
2449 | /* FALLTHROUGH */ | |
2450 | ||
2451 | case ECOND_CRYPTEQ: | |
2452 | case ECOND_INLIST: | |
2453 | case ECOND_INLISTI: | |
2454 | case ECOND_MATCH: | |
059ec3d9 PH |
2455 | |
2456 | case ECOND_NUM_L: /* Numerical comparisons */ | |
2457 | case ECOND_NUM_LE: | |
2458 | case ECOND_NUM_E: | |
2459 | case ECOND_NUM_EE: | |
2460 | case ECOND_NUM_G: | |
2461 | case ECOND_NUM_GE: | |
2462 | ||
2463 | case ECOND_STR_LT: /* String comparisons */ | |
2464 | case ECOND_STR_LTI: | |
2465 | case ECOND_STR_LE: | |
2466 | case ECOND_STR_LEI: | |
2467 | case ECOND_STR_EQ: | |
2468 | case ECOND_STR_EQI: | |
2469 | case ECOND_STR_GT: | |
2470 | case ECOND_STR_GTI: | |
2471 | case ECOND_STR_GE: | |
2472 | case ECOND_STR_GEI: | |
2473 | ||
2474 | for (i = 0; i < 2; i++) | |
2475 | { | |
da6dbe26 PP |
2476 | /* Sometimes, we don't expand substrings; too many insecure configurations |
2477 | created using match_address{}{} and friends, where the second param | |
2478 | includes information from untrustworthy sources. */ | |
2479 | BOOL honour_dollar = TRUE; | |
2480 | if ((i > 0) && !sub2_honour_dollar) | |
2481 | honour_dollar = FALSE; | |
2482 | ||
059ec3d9 PH |
2483 | while (isspace(*s)) s++; |
2484 | if (*s != '{') | |
2485 | { | |
2486 | if (i == 0) goto COND_FAILED_CURLY_START; | |
2487 | expand_string_message = string_sprintf("missing 2nd string in {} " | |
2488 | "after \"%s\"", name); | |
2489 | return NULL; | |
2490 | } | |
da6dbe26 | 2491 | sub[i] = expand_string_internal(s+1, TRUE, &s, yield == NULL, |
b0e85a8f | 2492 | honour_dollar, resetok); |
059ec3d9 PH |
2493 | if (sub[i] == NULL) return NULL; |
2494 | if (*s++ != '}') goto COND_FAILED_CURLY_END; | |
2495 | ||
2496 | /* Convert to numerical if required; we know that the names of all the | |
2497 | conditions that compare numbers do not start with a letter. This just saves | |
2498 | checking for them individually. */ | |
2499 | ||
d6066548 | 2500 | if (!isalpha(name[0]) && yield != NULL) |
059ec3d9 | 2501 | { |
5dd1517f PH |
2502 | if (sub[i][0] == 0) |
2503 | { | |
2504 | num[i] = 0; | |
2505 | DEBUG(D_expand) | |
2506 | debug_printf("empty string cast to zero for numerical comparison\n"); | |
2507 | } | |
2508 | else | |
2509 | { | |
7685ce68 | 2510 | num[i] = expanded_string_integer(sub[i], FALSE); |
5dd1517f PH |
2511 | if (expand_string_message != NULL) return NULL; |
2512 | } | |
059ec3d9 PH |
2513 | } |
2514 | } | |
2515 | ||
2516 | /* Result not required */ | |
2517 | ||
2518 | if (yield == NULL) return s; | |
2519 | ||
2520 | /* Do an appropriate comparison */ | |
2521 | ||
2522 | switch(cond_type) | |
2523 | { | |
2524 | case ECOND_NUM_E: | |
2525 | case ECOND_NUM_EE: | |
b5b871ac | 2526 | tempcond = (num[0] == num[1]); |
059ec3d9 PH |
2527 | break; |
2528 | ||
2529 | case ECOND_NUM_G: | |
b5b871ac | 2530 | tempcond = (num[0] > num[1]); |
059ec3d9 PH |
2531 | break; |
2532 | ||
2533 | case ECOND_NUM_GE: | |
b5b871ac | 2534 | tempcond = (num[0] >= num[1]); |
059ec3d9 PH |
2535 | break; |
2536 | ||
2537 | case ECOND_NUM_L: | |
b5b871ac | 2538 | tempcond = (num[0] < num[1]); |
059ec3d9 PH |
2539 | break; |
2540 | ||
2541 | case ECOND_NUM_LE: | |
b5b871ac | 2542 | tempcond = (num[0] <= num[1]); |
059ec3d9 PH |
2543 | break; |
2544 | ||
2545 | case ECOND_STR_LT: | |
b5b871ac | 2546 | tempcond = (Ustrcmp(sub[0], sub[1]) < 0); |
059ec3d9 PH |
2547 | break; |
2548 | ||
2549 | case ECOND_STR_LTI: | |
b5b871ac | 2550 | tempcond = (strcmpic(sub[0], sub[1]) < 0); |
059ec3d9 PH |
2551 | break; |
2552 | ||
2553 | case ECOND_STR_LE: | |
b5b871ac | 2554 | tempcond = (Ustrcmp(sub[0], sub[1]) <= 0); |
059ec3d9 PH |
2555 | break; |
2556 | ||
2557 | case ECOND_STR_LEI: | |
b5b871ac | 2558 | tempcond = (strcmpic(sub[0], sub[1]) <= 0); |
059ec3d9 PH |
2559 | break; |
2560 | ||
2561 | case ECOND_STR_EQ: | |
b5b871ac | 2562 | tempcond = (Ustrcmp(sub[0], sub[1]) == 0); |
059ec3d9 PH |
2563 | break; |
2564 | ||
2565 | case ECOND_STR_EQI: | |
b5b871ac | 2566 | tempcond = (strcmpic(sub[0], sub[1]) == 0); |
059ec3d9 PH |
2567 | break; |
2568 | ||
2569 | case ECOND_STR_GT: | |
b5b871ac | 2570 | tempcond = (Ustrcmp(sub[0], sub[1]) > 0); |
059ec3d9 PH |
2571 | break; |
2572 | ||
2573 | case ECOND_STR_GTI: | |
b5b871ac | 2574 | tempcond = (strcmpic(sub[0], sub[1]) > 0); |
059ec3d9 PH |
2575 | break; |
2576 | ||
2577 | case ECOND_STR_GE: | |
b5b871ac | 2578 | tempcond = (Ustrcmp(sub[0], sub[1]) >= 0); |
059ec3d9 PH |
2579 | break; |
2580 | ||
2581 | case ECOND_STR_GEI: | |
b5b871ac | 2582 | tempcond = (strcmpic(sub[0], sub[1]) >= 0); |
059ec3d9 PH |
2583 | break; |
2584 | ||
2585 | case ECOND_MATCH: /* Regular expression match */ | |
2586 | re = pcre_compile(CS sub[1], PCRE_COPT, (const char **)&rerror, &roffset, | |
2587 | NULL); | |
2588 | if (re == NULL) | |
2589 | { | |
2590 | expand_string_message = string_sprintf("regular expression error in " | |
2591 | "\"%s\": %s at offset %d", sub[1], rerror, roffset); | |
2592 | return NULL; | |
2593 | } | |
b5b871ac | 2594 | tempcond = regex_match_and_setup(re, sub[0], 0, -1); |
059ec3d9 PH |
2595 | break; |
2596 | ||
2597 | case ECOND_MATCH_ADDRESS: /* Match in an address list */ | |
2598 | rc = match_address_list(sub[0], TRUE, FALSE, &(sub[1]), NULL, -1, 0, NULL); | |
2599 | goto MATCHED_SOMETHING; | |
2600 | ||
2601 | case ECOND_MATCH_DOMAIN: /* Match in a domain list */ | |
2602 | rc = match_isinlist(sub[0], &(sub[1]), 0, &domainlist_anchor, NULL, | |
2603 | MCL_DOMAIN + MCL_NOEXPAND, TRUE, NULL); | |
2604 | goto MATCHED_SOMETHING; | |
2605 | ||
32d668a5 | 2606 | case ECOND_MATCH_IP: /* Match IP address in a host list */ |
7e66e54d | 2607 | if (sub[0][0] != 0 && string_is_ip_address(sub[0], NULL) == 0) |
32d668a5 PH |
2608 | { |
2609 | expand_string_message = string_sprintf("\"%s\" is not an IP address", | |
2610 | sub[0]); | |
2611 | return NULL; | |
2612 | } | |
2613 | else | |
2614 | { | |
2615 | unsigned int *nullcache = NULL; | |
2616 | check_host_block cb; | |
2617 | ||
2618 | cb.host_name = US""; | |
2619 | cb.host_address = sub[0]; | |
2620 | ||
2621 | /* If the host address starts off ::ffff: it is an IPv6 address in | |
2622 | IPv4-compatible mode. Find the IPv4 part for checking against IPv4 | |
2623 | addresses. */ | |
2624 | ||
2625 | cb.host_ipv4 = (Ustrncmp(cb.host_address, "::ffff:", 7) == 0)? | |
2626 | cb.host_address + 7 : cb.host_address; | |
2627 | ||
2628 | rc = match_check_list( | |
2629 | &sub[1], /* the list */ | |
2630 | 0, /* separator character */ | |
2631 | &hostlist_anchor, /* anchor pointer */ | |
2632 | &nullcache, /* cache pointer */ | |
2633 | check_host, /* function for testing */ | |
2634 | &cb, /* argument for function */ | |
2635 | MCL_HOST, /* type of check */ | |
2636 | sub[0], /* text for debugging */ | |
2637 | NULL); /* where to pass back data */ | |
2638 | } | |
2639 | goto MATCHED_SOMETHING; | |
2640 | ||
059ec3d9 PH |
2641 | case ECOND_MATCH_LOCAL_PART: |
2642 | rc = match_isinlist(sub[0], &(sub[1]), 0, &localpartlist_anchor, NULL, | |
2643 | MCL_LOCALPART + MCL_NOEXPAND, TRUE, NULL); | |
2644 | /* Fall through */ | |
9a26b6b2 | 2645 | /* VVVVVVVVVVVV */ |
059ec3d9 PH |
2646 | MATCHED_SOMETHING: |
2647 | switch(rc) | |
2648 | { | |
2649 | case OK: | |
b5b871ac | 2650 | tempcond = TRUE; |
059ec3d9 PH |
2651 | break; |
2652 | ||
2653 | case FAIL: | |
b5b871ac | 2654 | tempcond = FALSE; |
059ec3d9 PH |
2655 | break; |
2656 | ||
2657 | case DEFER: | |
2658 | expand_string_message = string_sprintf("unable to complete match " | |
2659 | "against \"%s\": %s", sub[1], search_error_message); | |
2660 | return NULL; | |
2661 | } | |
2662 | ||
2663 | break; | |
2664 | ||
2665 | /* Various "encrypted" comparisons. If the second string starts with | |
2666 | "{" then an encryption type is given. Default to crypt() or crypt16() | |
2667 | (build-time choice). */ | |
b5b871ac | 2668 | /* }-for-text-editors */ |
059ec3d9 PH |
2669 | |
2670 | case ECOND_CRYPTEQ: | |
2671 | #ifndef SUPPORT_CRYPTEQ | |
2672 | goto COND_FAILED_NOT_COMPILED; | |
2673 | #else | |
2674 | if (strncmpic(sub[1], US"{md5}", 5) == 0) | |
2675 | { | |
2676 | int sublen = Ustrlen(sub[1]+5); | |
2677 | md5 base; | |
2678 | uschar digest[16]; | |
2679 | ||
2680 | md5_start(&base); | |
2681 | md5_end(&base, (uschar *)sub[0], Ustrlen(sub[0]), digest); | |
2682 | ||
2683 | /* If the length that we are comparing against is 24, the MD5 digest | |
2684 | is expressed as a base64 string. This is the way LDAP does it. However, | |
2685 | some other software uses a straightforward hex representation. We assume | |
2686 | this if the length is 32. Other lengths fail. */ | |
2687 | ||
2688 | if (sublen == 24) | |
2689 | { | |
2690 | uschar *coded = auth_b64encode((uschar *)digest, 16); | |
2691 | DEBUG(D_auth) debug_printf("crypteq: using MD5+B64 hashing\n" | |
2692 | " subject=%s\n crypted=%s\n", coded, sub[1]+5); | |
b5b871ac | 2693 | tempcond = (Ustrcmp(coded, sub[1]+5) == 0); |
059ec3d9 PH |
2694 | } |
2695 | else if (sublen == 32) | |
2696 | { | |
2697 | int i; | |
2698 | uschar coded[36]; | |
2699 | for (i = 0; i < 16; i++) sprintf(CS (coded+2*i), "%02X", digest[i]); | |
2700 | coded[32] = 0; | |
2701 | DEBUG(D_auth) debug_printf("crypteq: using MD5+hex hashing\n" | |
2702 | " subject=%s\n crypted=%s\n", coded, sub[1]+5); | |
b5b871ac | 2703 | tempcond = (strcmpic(coded, sub[1]+5) == 0); |
059ec3d9 PH |
2704 | } |
2705 | else | |
2706 | { | |
2707 | DEBUG(D_auth) debug_printf("crypteq: length for MD5 not 24 or 32: " | |
2708 | "fail\n crypted=%s\n", sub[1]+5); | |
b5b871ac | 2709 | tempcond = FALSE; |
059ec3d9 PH |
2710 | } |
2711 | } | |
2712 | ||
2713 | else if (strncmpic(sub[1], US"{sha1}", 6) == 0) | |
2714 | { | |
2715 | int sublen = Ustrlen(sub[1]+6); | |
2716 | sha1 base; | |
2717 | uschar digest[20]; | |
2718 | ||
2719 | sha1_start(&base); | |
2720 | sha1_end(&base, (uschar *)sub[0], Ustrlen(sub[0]), digest); | |
2721 | ||
2722 | /* If the length that we are comparing against is 28, assume the SHA1 | |
2723 | digest is expressed as a base64 string. If the length is 40, assume a | |
2724 | straightforward hex representation. Other lengths fail. */ | |
2725 | ||
2726 | if (sublen == 28) | |
2727 | { | |
2728 | uschar *coded = auth_b64encode((uschar *)digest, 20); | |
2729 | DEBUG(D_auth) debug_printf("crypteq: using SHA1+B64 hashing\n" | |
2730 | " subject=%s\n crypted=%s\n", coded, sub[1]+6); | |
b5b871ac | 2731 | tempcond = (Ustrcmp(coded, sub[1]+6) == 0); |
059ec3d9 PH |
2732 | } |
2733 | else if (sublen == 40) | |
2734 | { | |
2735 | int i; | |
2736 | uschar coded[44]; | |
2737 | for (i = 0; i < 20; i++) sprintf(CS (coded+2*i), "%02X", digest[i]); | |
2738 | coded[40] = 0; | |
2739 | DEBUG(D_auth) debug_printf("crypteq: using SHA1+hex hashing\n" | |
2740 | " subject=%s\n crypted=%s\n", coded, sub[1]+6); | |
b5b871ac | 2741 | tempcond = (strcmpic(coded, sub[1]+6) == 0); |
059ec3d9 PH |
2742 | } |
2743 | else | |
2744 | { | |
2745 | DEBUG(D_auth) debug_printf("crypteq: length for SHA-1 not 28 or 40: " | |
2746 | "fail\n crypted=%s\n", sub[1]+6); | |
b5b871ac | 2747 | tempcond = FALSE; |
059ec3d9 PH |
2748 | } |
2749 | } | |
2750 | ||
2751 | else /* {crypt} or {crypt16} and non-{ at start */ | |
76dca828 | 2752 | /* }-for-text-editors */ |
059ec3d9 PH |
2753 | { |
2754 | int which = 0; | |
2755 | uschar *coded; | |
2756 | ||
2757 | if (strncmpic(sub[1], US"{crypt}", 7) == 0) | |
2758 | { | |
2759 | sub[1] += 7; | |
2760 | which = 1; | |
2761 | } | |
2762 | else if (strncmpic(sub[1], US"{crypt16}", 9) == 0) | |
2763 | { | |
2764 | sub[1] += 9; | |
2765 | which = 2; | |
2766 | } | |
b5b871ac | 2767 | else if (sub[1][0] == '{') /* }-for-text-editors */ |
059ec3d9 PH |
2768 | { |
2769 | expand_string_message = string_sprintf("unknown encryption mechanism " | |
2770 | "in \"%s\"", sub[1]); | |
2771 | return NULL; | |
2772 | } | |
2773 | ||
2774 | switch(which) | |
2775 | { | |
2776 | case 0: coded = US DEFAULT_CRYPT(CS sub[0], CS sub[1]); break; | |
2777 | case 1: coded = US crypt(CS sub[0], CS sub[1]); break; | |
2778 | default: coded = US crypt16(CS sub[0], CS sub[1]); break; | |
2779 | } | |
2780 | ||
2781 | #define STR(s) # s | |
2782 | #define XSTR(s) STR(s) | |
2783 | DEBUG(D_auth) debug_printf("crypteq: using %s()\n" | |
2784 | " subject=%s\n crypted=%s\n", | |
2785 | (which == 0)? XSTR(DEFAULT_CRYPT) : (which == 1)? "crypt" : "crypt16", | |
2786 | coded, sub[1]); | |
2787 | #undef STR | |
2788 | #undef XSTR | |
2789 | ||
2790 | /* If the encrypted string contains fewer than two characters (for the | |
2791 | salt), force failure. Otherwise we get false positives: with an empty | |
2792 | string the yield of crypt() is an empty string! */ | |
2793 | ||
b5b871ac JH |
2794 | tempcond = (Ustrlen(sub[1]) < 2)? FALSE : |
2795 | (Ustrcmp(coded, sub[1]) == 0); | |
059ec3d9 PH |
2796 | } |
2797 | break; | |
2798 | #endif /* SUPPORT_CRYPTEQ */ | |
76dca828 PP |
2799 | |
2800 | case ECOND_INLIST: | |
2801 | case ECOND_INLISTI: | |
2802 | { | |
55414b25 | 2803 | const uschar * list = sub[1]; |
76dca828 | 2804 | int sep = 0; |
76dca828 PP |
2805 | uschar *save_iterate_item = iterate_item; |
2806 | int (*compare)(const uschar *, const uschar *); | |
2807 | ||
82dbd376 JH |
2808 | DEBUG(D_expand) debug_printf("condition: %s\n", name); |
2809 | ||
b5b871ac | 2810 | tempcond = FALSE; |
55414b25 JH |
2811 | compare = cond_type == ECOND_INLISTI |
2812 | ? strcmpic : (int (*)(const uschar *, const uschar *)) strcmp; | |
76dca828 | 2813 | |
55414b25 | 2814 | while ((iterate_item = string_nextinlist(&list, &sep, NULL, 0))) |
76dca828 PP |
2815 | if (compare(sub[0], iterate_item) == 0) |
2816 | { | |
b5b871ac | 2817 | tempcond = TRUE; |
76dca828 PP |
2818 | break; |
2819 | } | |
2820 | iterate_item = save_iterate_item; | |
76dca828 PP |
2821 | } |
2822 | ||
059ec3d9 PH |
2823 | } /* Switch for comparison conditions */ |
2824 | ||
b5b871ac | 2825 | *yield = tempcond == testfor; |
059ec3d9 PH |
2826 | return s; /* End of comparison conditions */ |
2827 | ||
2828 | ||
2829 | /* and/or: computes logical and/or of several conditions */ | |
2830 | ||
2831 | case ECOND_AND: | |
2832 | case ECOND_OR: | |
2833 | subcondptr = (yield == NULL)? NULL : &tempcond; | |
2834 | combined_cond = (cond_type == ECOND_AND); | |
2835 | ||
2836 | while (isspace(*s)) s++; | |
b5b871ac | 2837 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
059ec3d9 PH |
2838 | |
2839 | for (;;) | |
2840 | { | |
2841 | while (isspace(*s)) s++; | |
b5b871ac | 2842 | /* {-for-text-editors */ |
059ec3d9 | 2843 | if (*s == '}') break; |
b5b871ac | 2844 | if (*s != '{') /* }-for-text-editors */ |
059ec3d9 PH |
2845 | { |
2846 | expand_string_message = string_sprintf("each subcondition " | |
2847 | "inside an \"%s{...}\" condition must be in its own {}", name); | |
2848 | return NULL; | |
2849 | } | |
2850 | ||
b0e85a8f | 2851 | if (!(s = eval_condition(s+1, resetok, subcondptr))) |
059ec3d9 PH |
2852 | { |
2853 | expand_string_message = string_sprintf("%s inside \"%s{...}\" condition", | |
2854 | expand_string_message, name); | |
2855 | return NULL; | |
2856 | } | |
2857 | while (isspace(*s)) s++; | |
2858 | ||
b5b871ac | 2859 | /* {-for-text-editors */ |
059ec3d9 PH |
2860 | if (*s++ != '}') |
2861 | { | |
b5b871ac | 2862 | /* {-for-text-editors */ |
059ec3d9 PH |
2863 | expand_string_message = string_sprintf("missing } at end of condition " |
2864 | "inside \"%s\" group", name); | |
2865 | return NULL; | |
2866 | } | |
2867 | ||
2868 | if (yield != NULL) | |
2869 | { | |
2870 | if (cond_type == ECOND_AND) | |
2871 | { | |
2872 | combined_cond &= tempcond; | |
2873 | if (!combined_cond) subcondptr = NULL; /* once false, don't */ | |
2874 | } /* evaluate any more */ | |
2875 | else | |
2876 | { | |
2877 | combined_cond |= tempcond; | |
2878 | if (combined_cond) subcondptr = NULL; /* once true, don't */ | |
2879 | } /* evaluate any more */ | |
2880 | } | |
2881 | } | |
2882 | ||
2883 | if (yield != NULL) *yield = (combined_cond == testfor); | |
2884 | return ++s; | |
2885 | ||
2886 | ||
0ce9abe6 PH |
2887 | /* forall/forany: iterates a condition with different values */ |
2888 | ||
2889 | case ECOND_FORALL: | |
2890 | case ECOND_FORANY: | |
2891 | { | |
55414b25 | 2892 | const uschar * list; |
0ce9abe6 | 2893 | int sep = 0; |
282b357d | 2894 | uschar *save_iterate_item = iterate_item; |
0ce9abe6 | 2895 | |
82dbd376 JH |
2896 | DEBUG(D_expand) debug_printf("condition: %s\n", name); |
2897 | ||
0ce9abe6 | 2898 | while (isspace(*s)) s++; |
b5b871ac | 2899 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
b0e85a8f | 2900 | sub[0] = expand_string_internal(s, TRUE, &s, (yield == NULL), TRUE, resetok); |
0ce9abe6 | 2901 | if (sub[0] == NULL) return NULL; |
b5b871ac | 2902 | /* {-for-text-editors */ |
0ce9abe6 PH |
2903 | if (*s++ != '}') goto COND_FAILED_CURLY_END; |
2904 | ||
2905 | while (isspace(*s)) s++; | |
b5b871ac | 2906 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
0ce9abe6 PH |
2907 | |
2908 | sub[1] = s; | |
2909 | ||
2910 | /* Call eval_condition once, with result discarded (as if scanning a | |
2911 | "false" part). This allows us to find the end of the condition, because if | |
2912 | the list it empty, we won't actually evaluate the condition for real. */ | |
2913 | ||
b0e85a8f | 2914 | if (!(s = eval_condition(sub[1], resetok, NULL))) |
0ce9abe6 PH |
2915 | { |
2916 | expand_string_message = string_sprintf("%s inside \"%s\" condition", | |
2917 | expand_string_message, name); | |
2918 | return NULL; | |
2919 | } | |
2920 | while (isspace(*s)) s++; | |
2921 | ||
b5b871ac | 2922 | /* {-for-text-editors */ |
0ce9abe6 PH |
2923 | if (*s++ != '}') |
2924 | { | |
b5b871ac | 2925 | /* {-for-text-editors */ |
0ce9abe6 PH |
2926 | expand_string_message = string_sprintf("missing } at end of condition " |
2927 | "inside \"%s\"", name); | |
2928 | return NULL; | |
2929 | } | |
2930 | ||
2931 | if (yield != NULL) *yield = !testfor; | |
55414b25 JH |
2932 | list = sub[0]; |
2933 | while ((iterate_item = string_nextinlist(&list, &sep, NULL, 0)) != NULL) | |
0ce9abe6 PH |
2934 | { |
2935 | DEBUG(D_expand) debug_printf("%s: $item = \"%s\"\n", name, iterate_item); | |
b0e85a8f | 2936 | if (!eval_condition(sub[1], resetok, &tempcond)) |
0ce9abe6 PH |
2937 | { |
2938 | expand_string_message = string_sprintf("%s inside \"%s\" condition", | |
2939 | expand_string_message, name); | |
e58c13cc | 2940 | iterate_item = save_iterate_item; |
0ce9abe6 PH |
2941 | return NULL; |
2942 | } | |
2943 | DEBUG(D_expand) debug_printf("%s: condition evaluated to %s\n", name, | |
2944 | tempcond? "true":"false"); | |
2945 | ||
2946 | if (yield != NULL) *yield = (tempcond == testfor); | |
2947 | if (tempcond == (cond_type == ECOND_FORANY)) break; | |
2948 | } | |
2949 | ||
282b357d | 2950 | iterate_item = save_iterate_item; |
0ce9abe6 PH |
2951 | return s; |
2952 | } | |
2953 | ||
2954 | ||
f3766eb5 NM |
2955 | /* The bool{} expansion condition maps a string to boolean. |
2956 | The values supported should match those supported by the ACL condition | |
2957 | (acl.c, ACLC_CONDITION) so that we keep to a minimum the different ideas | |
2958 | of true/false. Note that Router "condition" rules have a different | |
2959 | interpretation, where general data can be used and only a few values | |
2960 | map to FALSE. | |
2961 | Note that readconf.c boolean matching, for boolean configuration options, | |
6a8de854 PP |
2962 | only matches true/yes/false/no. |
2963 | The bool_lax{} condition matches the Router logic, which is much more | |
2964 | liberal. */ | |
f3766eb5 | 2965 | case ECOND_BOOL: |
6a8de854 | 2966 | case ECOND_BOOL_LAX: |
f3766eb5 NM |
2967 | { |
2968 | uschar *sub_arg[1]; | |
71265ae9 | 2969 | uschar *t, *t2; |
6a8de854 | 2970 | uschar *ourname; |
f3766eb5 NM |
2971 | size_t len; |
2972 | BOOL boolvalue = FALSE; | |
2973 | while (isspace(*s)) s++; | |
b5b871ac | 2974 | if (*s != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
6a8de854 | 2975 | ourname = cond_type == ECOND_BOOL_LAX ? US"bool_lax" : US"bool"; |
b0e85a8f | 2976 | switch(read_subs(sub_arg, 1, 1, &s, yield == NULL, FALSE, ourname, resetok)) |
f3766eb5 | 2977 | { |
6a8de854 PP |
2978 | case 1: expand_string_message = string_sprintf( |
2979 | "too few arguments or bracketing error for %s", | |
2980 | ourname); | |
f3766eb5 NM |
2981 | /*FALLTHROUGH*/ |
2982 | case 2: | |
2983 | case 3: return NULL; | |
2984 | } | |
2985 | t = sub_arg[0]; | |
2986 | while (isspace(*t)) t++; | |
2987 | len = Ustrlen(t); | |
71265ae9 PP |
2988 | if (len) |
2989 | { | |
2990 | /* trailing whitespace: seems like a good idea to ignore it too */ | |
2991 | t2 = t + len - 1; | |
2992 | while (isspace(*t2)) t2--; | |
2993 | if (t2 != (t + len)) | |
2994 | { | |
2995 | *++t2 = '\0'; | |
2996 | len = t2 - t; | |
2997 | } | |
2998 | } | |
f3766eb5 | 2999 | DEBUG(D_expand) |
6a8de854 PP |
3000 | debug_printf("considering %s: %s\n", ourname, len ? t : US"<empty>"); |
3001 | /* logic for the lax case from expand_check_condition(), which also does | |
3002 | expands, and the logic is both short and stable enough that there should | |
3003 | be no maintenance burden from replicating it. */ | |
f3766eb5 NM |
3004 | if (len == 0) |
3005 | boolvalue = FALSE; | |
51c7471d JH |
3006 | else if (*t == '-' |
3007 | ? Ustrspn(t+1, "0123456789") == len-1 | |
3008 | : Ustrspn(t, "0123456789") == len) | |
6a8de854 | 3009 | { |
f3766eb5 | 3010 | boolvalue = (Uatoi(t) == 0) ? FALSE : TRUE; |
6a8de854 PP |
3011 | /* expand_check_condition only does a literal string "0" check */ |
3012 | if ((cond_type == ECOND_BOOL_LAX) && (len > 1)) | |
3013 | boolvalue = TRUE; | |
3014 | } | |
f3766eb5 NM |
3015 | else if (strcmpic(t, US"true") == 0 || strcmpic(t, US"yes") == 0) |
3016 | boolvalue = TRUE; | |
3017 | else if (strcmpic(t, US"false") == 0 || strcmpic(t, US"no") == 0) | |
3018 | boolvalue = FALSE; | |
6a8de854 PP |
3019 | else if (cond_type == ECOND_BOOL_LAX) |
3020 | boolvalue = TRUE; | |
f3766eb5 NM |
3021 | else |
3022 | { | |
3023 | expand_string_message = string_sprintf("unrecognised boolean " | |
3024 | "value \"%s\"", t); | |
3025 | return NULL; | |
3026 | } | |
5ee6f336 | 3027 | if (yield != NULL) *yield = (boolvalue == testfor); |
f3766eb5 NM |
3028 | return s; |
3029 | } | |
3030 | ||
059ec3d9 PH |
3031 | /* Unknown condition */ |
3032 | ||
3033 | default: | |
3034 | expand_string_message = string_sprintf("unknown condition \"%s\"", name); | |
3035 | return NULL; | |
3036 | } /* End switch on condition type */ | |
3037 | ||
3038 | /* Missing braces at start and end of data */ | |
3039 | ||
3040 | COND_FAILED_CURLY_START: | |
3041 | expand_string_message = string_sprintf("missing { after \"%s\"", name); | |
3042 | return NULL; | |
3043 | ||
3044 | COND_FAILED_CURLY_END: | |
3045 | expand_string_message = string_sprintf("missing } at end of \"%s\" condition", | |
3046 | name); | |
3047 | return NULL; | |
3048 | ||
3049 | /* A condition requires code that is not compiled */ | |
3050 | ||
3051 | #if !defined(SUPPORT_PAM) || !defined(RADIUS_CONFIG_FILE) || \ | |
3052 | !defined(LOOKUP_LDAP) || !defined(CYRUS_PWCHECK_SOCKET) || \ | |
3053 | !defined(SUPPORT_CRYPTEQ) || !defined(CYRUS_SASLAUTHD_SOCKET) | |
3054 | COND_FAILED_NOT_COMPILED: | |
3055 | expand_string_message = string_sprintf("support for \"%s\" not compiled", | |
3056 | name); | |
3057 | return NULL; | |
3058 | #endif | |
3059 | } | |
3060 | ||
3061 | ||
3062 | ||
3063 | ||
3064 | /************************************************* | |
3065 | * Save numerical variables * | |
3066 | *************************************************/ | |
3067 | ||
3068 | /* This function is called from items such as "if" that want to preserve and | |
3069 | restore the numbered variables. | |
3070 | ||
3071 | Arguments: | |
3072 | save_expand_string points to an array of pointers to set | |
3073 | save_expand_nlength points to an array of ints for the lengths | |
3074 | ||
3075 | Returns: the value of expand max to save | |
3076 | */ | |
3077 | ||
3078 | static int | |
3079 | save_expand_strings(uschar **save_expand_nstring, int *save_expand_nlength) | |
3080 | { | |
3081 | int i; | |
3082 | for (i = 0; i <= expand_nmax; i++) | |
3083 | { | |
3084 | save_expand_nstring[i] = expand_nstring[i]; | |
3085 | save_expand_nlength[i] = expand_nlength[i]; | |
3086 | } | |
3087 | return expand_nmax; | |
3088 | } | |
3089 | ||
3090 | ||
3091 | ||
3092 | /************************************************* | |
3093 | * Restore numerical variables * | |
3094 | *************************************************/ | |
3095 | ||
3096 | /* This function restored saved values of numerical strings. | |
3097 | ||
3098 | Arguments: | |
3099 | save_expand_nmax the number of strings to restore | |
3100 | save_expand_string points to an array of pointers | |
3101 | save_expand_nlength points to an array of ints | |
3102 | ||
3103 | Returns: nothing | |
3104 | */ | |
3105 | ||
3106 | static void | |
3107 | restore_expand_strings(int save_expand_nmax, uschar **save_expand_nstring, | |
3108 | int *save_expand_nlength) | |
3109 | { | |
3110 | int i; | |
3111 | expand_nmax = save_expand_nmax; | |
3112 | for (i = 0; i <= expand_nmax; i++) | |
3113 | { | |
3114 | expand_nstring[i] = save_expand_nstring[i]; | |
3115 | expand_nlength[i] = save_expand_nlength[i]; | |
3116 | } | |
3117 | } | |
3118 | ||
3119 | ||
3120 | ||
3121 | ||
3122 | ||
3123 | /************************************************* | |
3124 | * Handle yes/no substrings * | |
3125 | *************************************************/ | |
3126 | ||
3127 | /* This function is used by ${if}, ${lookup} and ${extract} to handle the | |
3128 | alternative substrings that depend on whether or not the condition was true, | |
3129 | or the lookup or extraction succeeded. The substrings always have to be | |
3130 | expanded, to check their syntax, but "skipping" is set when the result is not | |
3131 | needed - this avoids unnecessary nested lookups. | |
3132 | ||
3133 | Arguments: | |
3134 | skipping TRUE if we were skipping when this item was reached | |
3135 | yes TRUE if the first string is to be used, else use the second | |
3136 | save_lookup a value to put back into lookup_value before the 2nd expansion | |
3137 | sptr points to the input string pointer | |
3138 | yieldptr points to the output string pointer | |
3139 | sizeptr points to the output string size | |
3140 | ptrptr points to the output string pointer | |
3141 | type "lookup" or "if" or "extract" or "run", for error message | |
b0e85a8f JH |
3142 | resetok if not NULL, pointer to flag - write FALSE if unsafe to reset |
3143 | the store. | |
059ec3d9 PH |
3144 | |
3145 | Returns: 0 OK; lookup_value has been reset to save_lookup | |
3146 | 1 expansion failed | |
3147 | 2 expansion failed because of bracketing error | |
3148 | */ | |
3149 | ||
3150 | static int | |
55414b25 | 3151 | process_yesno(BOOL skipping, BOOL yes, uschar *save_lookup, const uschar **sptr, |
b0e85a8f | 3152 | uschar **yieldptr, int *sizeptr, int *ptrptr, uschar *type, BOOL *resetok) |
059ec3d9 PH |
3153 | { |
3154 | int rc = 0; | |
55414b25 | 3155 | const uschar *s = *sptr; /* Local value */ |
059ec3d9 PH |
3156 | uschar *sub1, *sub2; |
3157 | ||
3158 | /* If there are no following strings, we substitute the contents of $value for | |
063b1e99 | 3159 | lookups and for extractions in the success case. For the ${if item, the string |
8e669ac1 | 3160 | "true" is substituted. In the fail case, nothing is substituted for all three |
063b1e99 | 3161 | items. */ |
059ec3d9 PH |
3162 | |
3163 | while (isspace(*s)) s++; | |
3164 | if (*s == '}') | |
3165 | { | |
063b1e99 PH |
3166 | if (type[0] == 'i') |
3167 | { | |
8e669ac1 | 3168 | if (yes) *yieldptr = string_cat(*yieldptr, sizeptr, ptrptr, US"true", 4); |
063b1e99 PH |
3169 | } |
3170 | else | |
8e669ac1 | 3171 | { |
063b1e99 PH |
3172 | if (yes && lookup_value != NULL) |
3173 | *yieldptr = string_cat(*yieldptr, sizeptr, ptrptr, lookup_value, | |
3174 | Ustrlen(lookup_value)); | |
3175 | lookup_value = save_lookup; | |
3176 | } | |
059ec3d9 PH |
3177 | s++; |
3178 | goto RETURN; | |
3179 | } | |
3180 | ||
9b4768fa PH |
3181 | /* The first following string must be braced. */ |
3182 | ||
3183 | if (*s++ != '{') goto FAILED_CURLY; | |
3184 | ||
059ec3d9 PH |
3185 | /* Expand the first substring. Forced failures are noticed only if we actually |
3186 | want this string. Set skipping in the call in the fail case (this will always | |
3187 | be the case if we were already skipping). */ | |
3188 | ||
b0e85a8f | 3189 | sub1 = expand_string_internal(s, TRUE, &s, !yes, TRUE, resetok); |
059ec3d9 PH |
3190 | if (sub1 == NULL && (yes || !expand_string_forcedfail)) goto FAILED; |
3191 | expand_string_forcedfail = FALSE; | |
3192 | if (*s++ != '}') goto FAILED_CURLY; | |
3193 | ||
3194 | /* If we want the first string, add it to the output */ | |
3195 | ||
3196 | if (yes) | |
3197 | *yieldptr = string_cat(*yieldptr, sizeptr, ptrptr, sub1, Ustrlen(sub1)); | |
3198 | ||
3199 | /* If this is called from a lookup or an extract, we want to restore $value to | |
3200 | what it was at the start of the item, so that it has this value during the | |
d20976dc PH |
3201 | second string expansion. For the call from "if" or "run" to this function, |
3202 | save_lookup is set to lookup_value, so that this statement does nothing. */ | |
059ec3d9 PH |
3203 | |
3204 | lookup_value = save_lookup; | |
3205 | ||
3206 | /* There now follows either another substring, or "fail", or nothing. This | |
3207 | time, forced failures are noticed only if we want the second string. We must | |
3208 | set skipping in the nested call if we don't want this string, or if we were | |
3209 | already skipping. */ | |
3210 | ||
3211 | while (isspace(*s)) s++; | |
3212 | if (*s == '{') | |
3213 | { | |
b0e85a8f | 3214 | sub2 = expand_string_internal(s+1, TRUE, &s, yes || skipping, TRUE, resetok); |
059ec3d9 PH |
3215 | if (sub2 == NULL && (!yes || !expand_string_forcedfail)) goto FAILED; |
3216 | expand_string_forcedfail = FALSE; | |
3217 | if (*s++ != '}') goto FAILED_CURLY; | |
3218 | ||
3219 | /* If we want the second string, add it to the output */ | |
3220 | ||
3221 | if (!yes) | |
3222 | *yieldptr = string_cat(*yieldptr, sizeptr, ptrptr, sub2, Ustrlen(sub2)); | |
3223 | } | |
3224 | ||
3225 | /* If there is no second string, but the word "fail" is present when the use of | |
3226 | the second string is wanted, set a flag indicating it was a forced failure | |
3227 | rather than a syntactic error. Swallow the terminating } in case this is nested | |
3228 | inside another lookup or if or extract. */ | |
3229 | ||
3230 | else if (*s != '}') | |
3231 | { | |
3232 | uschar name[256]; | |
55414b25 JH |
3233 | /* deconst cast ok here as source is s anyway */ |
3234 | s = US read_name(name, sizeof(name), s, US"_"); | |
059ec3d9 PH |
3235 | if (Ustrcmp(name, "fail") == 0) |
3236 | { | |
3237 | if (!yes && !skipping) | |
3238 | { | |
3239 | while (isspace(*s)) s++; | |
3240 | if (*s++ != '}') goto FAILED_CURLY; | |
3241 | expand_string_message = | |
3242 | string_sprintf("\"%s\" failed and \"fail\" requested", type); | |
3243 | expand_string_forcedfail = TRUE; | |
3244 | goto FAILED; | |
3245 | } | |
3246 | } | |
3247 | else | |
3248 | { | |
3249 | expand_string_message = | |
3250 | string_sprintf("syntax error in \"%s\" item - \"fail\" expected", type); | |
3251 | goto FAILED; | |
3252 | } | |
3253 | } | |
3254 | ||
3255 | /* All we have to do now is to check on the final closing brace. */ | |
3256 | ||
3257 | while (isspace(*s)) s++; | |
3258 | if (*s++ == '}') goto RETURN; | |
3259 | ||
3260 | /* Get here if there is a bracketing failure */ | |
3261 | ||
3262 | FAILED_CURLY: | |
3263 | rc++; | |
3264 | ||
3265 | /* Get here for other failures */ | |
3266 | ||
3267 | FAILED: | |
3268 | rc++; | |
3269 | ||
3270 | /* Update the input pointer value before returning */ | |
3271 | ||
3272 | RETURN: | |
3273 | *sptr = s; | |
3274 | return rc; | |
3275 | } | |
3276 | ||
3277 | ||
3278 | ||
3279 | ||
059ec3d9 PH |
3280 | /************************************************* |
3281 | * Handle MD5 or SHA-1 computation for HMAC * | |
3282 | *************************************************/ | |
3283 | ||
3284 | /* These are some wrapping functions that enable the HMAC code to be a bit | |
3285 | cleaner. A good compiler will spot the tail recursion. | |
3286 | ||
3287 | Arguments: | |
3288 | type HMAC_MD5 or HMAC_SHA1 | |
3289 | remaining are as for the cryptographic hash functions | |
3290 | ||
3291 | Returns: nothing | |
3292 | */ | |
3293 | ||
3294 | static void | |
3295 | chash_start(int type, void *base) | |
3296 | { | |
3297 | if (type == HMAC_MD5) | |
3298 | md5_start((md5 *)base); | |
3299 | else | |
3300 | sha1_start((sha1 *)base); | |
3301 | } | |
3302 | ||
3303 | static void | |
3304 | chash_mid(int type, void *base, uschar *string) | |
3305 | { | |
3306 | if (type == HMAC_MD5) | |
3307 | md5_mid((md5 *)base, string); | |
3308 | else | |
3309 | sha1_mid((sha1 *)base, string); | |
3310 | } | |
3311 | ||
3312 | static void | |
3313 | chash_end(int type, void *base, uschar *string, int length, uschar *digest) | |
3314 | { | |
3315 | if (type == HMAC_MD5) | |
3316 | md5_end((md5 *)base, string, length, digest); | |
3317 | else | |
3318 | sha1_end((sha1 *)base, string, length, digest); | |
3319 | } | |
3320 | ||
3321 | ||
3322 | ||
3323 | ||
3324 | ||
1549ea3b PH |
3325 | /******************************************************** |
3326 | * prvs: Get last three digits of days since Jan 1, 1970 * | |
3327 | ********************************************************/ | |
3328 | ||
3329 | /* This is needed to implement the "prvs" BATV reverse | |
3330 | path signing scheme | |
3331 | ||
3332 | Argument: integer "days" offset to add or substract to | |
3333 | or from the current number of days. | |
3334 | ||
3335 | Returns: pointer to string containing the last three | |
3336 | digits of the number of days since Jan 1, 1970, | |
3337 | modified by the offset argument, NULL if there | |
3338 | was an error in the conversion. | |
3339 | ||
3340 | */ | |
3341 | ||
3342 | static uschar * | |
3343 | prvs_daystamp(int day_offset) | |
3344 | { | |
a86229cf PH |
3345 | uschar *days = store_get(32); /* Need at least 24 for cases */ |
3346 | (void)string_format(days, 32, TIME_T_FMT, /* where TIME_T_FMT is %lld */ | |
1549ea3b | 3347 | (time(NULL) + day_offset*86400)/86400); |
e169f567 | 3348 | return (Ustrlen(days) >= 3) ? &days[Ustrlen(days)-3] : US"100"; |
1549ea3b PH |
3349 | } |
3350 | ||
3351 | ||
3352 | ||
3353 | /******************************************************** | |
3354 | * prvs: perform HMAC-SHA1 computation of prvs bits * | |
3355 | ********************************************************/ | |
3356 | ||
3357 | /* This is needed to implement the "prvs" BATV reverse | |
3358 | path signing scheme | |
3359 | ||
3360 | Arguments: | |
3361 | address RFC2821 Address to use | |
3362 | key The key to use (must be less than 64 characters | |
3363 | in size) | |
3364 | key_num Single-digit key number to use. Defaults to | |
3365 | '0' when NULL. | |
3366 | ||
3367 | Returns: pointer to string containing the first three | |
3368 | bytes of the final hash in hex format, NULL if | |
3369 | there was an error in the process. | |
3370 | */ | |
3371 | ||
3372 | static uschar * | |
3373 | prvs_hmac_sha1(uschar *address, uschar *key, uschar *key_num, uschar *daystamp) | |
3374 | { | |
3375 | uschar *hash_source, *p; | |
3376 | int size = 0,offset = 0,i; | |
3377 | sha1 sha1_base; | |
3378 | void *use_base = &sha1_base; | |
3379 | uschar innerhash[20]; | |
3380 | uschar finalhash[20]; | |
3381 | uschar innerkey[64]; | |
3382 | uschar outerkey[64]; | |
3383 | uschar *finalhash_hex = store_get(40); | |
3384 | ||
3385 | if (key_num == NULL) | |
3386 | key_num = US"0"; | |
3387 | ||
3388 | if (Ustrlen(key) > 64) | |
3389 | return NULL; | |
3390 | ||
3391 | hash_source = string_cat(NULL,&size,&offset,key_num,1); | |
3392 | string_cat(hash_source,&size,&offset,daystamp,3); | |
3393 | string_cat(hash_source,&size,&offset,address,Ustrlen(address)); | |
3394 | hash_source[offset] = '\0'; | |
3395 | ||
3396 | DEBUG(D_expand) debug_printf("prvs: hash source is '%s'\n", hash_source); | |
3397 | ||
3398 | memset(innerkey, 0x36, 64); | |
3399 | memset(outerkey, 0x5c, 64); | |
3400 | ||
3401 | for (i = 0; i < Ustrlen(key); i++) | |
3402 | { | |
3403 | innerkey[i] ^= key[i]; | |
3404 | outerkey[i] ^= key[i]; | |
3405 | } | |
3406 | ||
3407 | chash_start(HMAC_SHA1, use_base); | |
3408 | chash_mid(HMAC_SHA1, use_base, innerkey); | |
3409 | chash_end(HMAC_SHA1, use_base, hash_source, offset, innerhash); | |
3410 | ||
3411 | chash_start(HMAC_SHA1, use_base); | |
3412 | chash_mid(HMAC_SHA1, use_base, outerkey); | |
3413 | chash_end(HMAC_SHA1, use_base, innerhash, 20, finalhash); | |
3414 | ||
3415 | p = finalhash_hex; | |
3416 | for (i = 0; i < 3; i++) | |
3417 | { | |
3418 | *p++ = hex_digits[(finalhash[i] & 0xf0) >> 4]; | |
3419 | *p++ = hex_digits[finalhash[i] & 0x0f]; | |
3420 | } | |
3421 | *p = '\0'; | |
3422 | ||
3423 | return finalhash_hex; | |
3424 | } | |
3425 | ||
3426 | ||
3427 | ||
3428 | ||
059ec3d9 PH |
3429 | /************************************************* |
3430 | * Join a file onto the output string * | |
3431 | *************************************************/ | |
3432 | ||
3433 | /* This is used for readfile and after a run expansion. It joins the contents | |
3434 | of a file onto the output string, globally replacing newlines with a given | |
3435 | string (optionally). The file is closed at the end. | |
3436 | ||
3437 | Arguments: | |
3438 | f the FILE | |
3439 | yield pointer to the expandable string | |
3440 | sizep pointer to the current size | |
3441 | ptrp pointer to the current position | |
3442 | eol newline replacement string, or NULL | |
3443 | ||
3444 | Returns: new value of string pointer | |
3445 | */ | |
3446 | ||
3447 | static uschar * | |
3448 | cat_file(FILE *f, uschar *yield, int *sizep, int *ptrp, uschar *eol) | |
3449 | { | |
3450 | int eollen; | |
3451 | uschar buffer[1024]; | |
3452 | ||
3453 | eollen = (eol == NULL)? 0 : Ustrlen(eol); | |
3454 | ||
3455 | while (Ufgets(buffer, sizeof(buffer), f) != NULL) | |
3456 | { | |
3457 | int len = Ustrlen(buffer); | |
3458 | if (eol != NULL && buffer[len-1] == '\n') len--; | |
3459 | yield = string_cat(yield, sizep, ptrp, buffer, len); | |
3460 | if (buffer[len] != 0) | |
3461 | yield = string_cat(yield, sizep, ptrp, eol, eollen); | |
3462 | } | |
3463 | ||
3464 | if (yield != NULL) yield[*ptrp] = 0; | |
3465 | ||
3466 | return yield; | |
3467 | } | |
3468 | ||
3469 | ||
3470 | ||
3471 | ||
3472 | /************************************************* | |
3473 | * Evaluate numeric expression * | |
3474 | *************************************************/ | |
3475 | ||
af561417 PH |
3476 | /* This is a set of mutually recursive functions that evaluate an arithmetic |
3477 | expression involving + - * / % & | ^ ~ << >> and parentheses. The only one of | |
3478 | these functions that is called from elsewhere is eval_expr, whose interface is: | |
059ec3d9 PH |
3479 | |
3480 | Arguments: | |
af561417 PH |
3481 | sptr pointer to the pointer to the string - gets updated |
3482 | decimal TRUE if numbers are to be assumed decimal | |
3483 | error pointer to where to put an error message - must be NULL on input | |
3484 | endket TRUE if ')' must terminate - FALSE for external call | |
059ec3d9 | 3485 | |
af561417 PH |
3486 | Returns: on success: the value of the expression, with *error still NULL |
3487 | on failure: an undefined value, with *error = a message | |
059ec3d9 PH |
3488 | */ |
3489 | ||
97d17305 | 3490 | static int_eximarith_t eval_op_or(uschar **, BOOL, uschar **); |
af561417 | 3491 | |
059ec3d9 | 3492 | |
97d17305 | 3493 | static int_eximarith_t |
059ec3d9 PH |
3494 | eval_expr(uschar **sptr, BOOL decimal, uschar **error, BOOL endket) |
3495 | { | |
3496 | uschar *s = *sptr; | |
97d17305 | 3497 | int_eximarith_t x = eval_op_or(&s, decimal, error); |
059ec3d9 PH |
3498 | if (*error == NULL) |
3499 | { | |
af561417 | 3500 | if (endket) |
059ec3d9 | 3501 | { |
af561417 PH |
3502 | if (*s != ')') |
3503 | *error = US"expecting closing parenthesis"; | |
3504 | else | |
3505 | while (isspace(*(++s))); | |
059ec3d9 | 3506 | } |
af561417 | 3507 | else if (*s != 0) *error = US"expecting operator"; |
059ec3d9 | 3508 | } |
059ec3d9 PH |
3509 | *sptr = s; |
3510 | return x; | |
3511 | } | |
3512 | ||
af561417 | 3513 | |
97d17305 | 3514 | static int_eximarith_t |
af561417 | 3515 | eval_number(uschar **sptr, BOOL decimal, uschar **error) |
059ec3d9 PH |
3516 | { |
3517 | register int c; | |
97d17305 | 3518 | int_eximarith_t n; |
059ec3d9 PH |
3519 | uschar *s = *sptr; |
3520 | while (isspace(*s)) s++; | |
3521 | c = *s; | |
af561417 | 3522 | if (isdigit(c)) |
059ec3d9 PH |
3523 | { |
3524 | int count; | |
97d17305 | 3525 | (void)sscanf(CS s, (decimal? SC_EXIM_DEC "%n" : SC_EXIM_ARITH "%n"), &n, &count); |
059ec3d9 | 3526 | s += count; |
97d17305 JH |
3527 | switch (tolower(*s)) |
3528 | { | |
3529 | default: break; | |
3530 | case 'k': n *= 1024; s++; break; | |
3531 | case 'm': n *= 1024*1024; s++; break; | |
3532 | case 'g': n *= 1024*1024*1024; s++; break; | |
3533 | } | |
059ec3d9 PH |
3534 | while (isspace (*s)) s++; |
3535 | } | |
3536 | else if (c == '(') | |
3537 | { | |
3538 | s++; | |
3539 | n = eval_expr(&s, decimal, error, 1); | |
3540 | } | |
3541 | else | |
3542 | { | |
3543 | *error = US"expecting number or opening parenthesis"; | |
3544 | n = 0; | |
3545 | } | |
3546 | *sptr = s; | |
3547 | return n; | |
3548 | } | |
3549 | ||
af561417 | 3550 | |
97d17305 | 3551 | static int_eximarith_t |
aa7c82b2 | 3552 | eval_op_unary(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3553 | { |
3554 | uschar *s = *sptr; | |
97d17305 | 3555 | int_eximarith_t x; |
af561417 PH |
3556 | while (isspace(*s)) s++; |
3557 | if (*s == '+' || *s == '-' || *s == '~') | |
3558 | { | |
3559 | int op = *s++; | |
3560 | x = eval_op_unary(&s, decimal, error); | |
3561 | if (op == '-') x = -x; | |
3562 | else if (op == '~') x = ~x; | |
3563 | } | |
3564 | else | |
3565 | { | |
3566 | x = eval_number(&s, decimal, error); | |
3567 | } | |
3568 | *sptr = s; | |
3569 | return x; | |
3570 | } | |
3571 | ||
3572 | ||
97d17305 | 3573 | static int_eximarith_t |
aa7c82b2 | 3574 | eval_op_mult(uschar **sptr, BOOL decimal, uschar **error) |
059ec3d9 PH |
3575 | { |
3576 | uschar *s = *sptr; | |
97d17305 | 3577 | int_eximarith_t x = eval_op_unary(&s, decimal, error); |
059ec3d9 PH |
3578 | if (*error == NULL) |
3579 | { | |
5591031b | 3580 | while (*s == '*' || *s == '/' || *s == '%') |
059ec3d9 PH |
3581 | { |
3582 | int op = *s++; | |
97d17305 | 3583 | int_eximarith_t y = eval_op_unary(&s, decimal, error); |
059ec3d9 | 3584 | if (*error != NULL) break; |
053a9aa3 PP |
3585 | /* SIGFPE both on div/mod by zero and on INT_MIN / -1, which would give |
3586 | * a value of INT_MAX+1. Note that INT_MIN * -1 gives INT_MIN for me, which | |
3587 | * is a bug somewhere in [gcc 4.2.1, FreeBSD, amd64]. In fact, -N*-M where | |
3588 | * -N*M is INT_MIN will yielf INT_MIN. | |
3589 | * Since we don't support floating point, this is somewhat simpler. | |
3590 | * Ideally, we'd return an error, but since we overflow for all other | |
3591 | * arithmetic, consistency suggests otherwise, but what's the correct value | |
3592 | * to use? There is none. | |
3593 | * The C standard guarantees overflow for unsigned arithmetic but signed | |
3594 | * overflow invokes undefined behaviour; in practice, this is overflow | |
3595 | * except for converting INT_MIN to INT_MAX+1. We also can't guarantee | |
3596 | * that long/longlong larger than int are available, or we could just work | |
3597 | * with larger types. We should consider whether to guarantee 32bit eval | |
3598 | * and 64-bit working variables, with errors returned. For now ... | |
3599 | * So, the only SIGFPEs occur with a non-shrinking div/mod, thus -1; we | |
3600 | * can just let the other invalid results occur otherwise, as they have | |
3601 | * until now. For this one case, we can coerce. | |
3602 | */ | |
4328fd3c | 3603 | if (y == -1 && x == EXIM_ARITH_MIN && op != '*') |
053a9aa3 PP |
3604 | { |
3605 | DEBUG(D_expand) | |
97d17305 | 3606 | debug_printf("Integer exception dodging: " PR_EXIM_ARITH "%c-1 coerced to " PR_EXIM_ARITH "\n", |
4328fd3c JH |
3607 | EXIM_ARITH_MIN, op, EXIM_ARITH_MAX); |
3608 | x = EXIM_ARITH_MAX; | |
053a9aa3 PP |
3609 | continue; |
3610 | } | |
a5b52695 PP |
3611 | if (op == '*') |
3612 | x *= y; | |
3613 | else | |
3614 | { | |
3615 | if (y == 0) | |
54e7ce4a | 3616 | { |
a5b52695 PP |
3617 | *error = (op == '/') ? US"divide by zero" : US"modulo by zero"; |
3618 | x = 0; | |
3619 | break; | |
54e7ce4a | 3620 | } |
a5b52695 PP |
3621 | if (op == '/') |
3622 | x /= y; | |
3623 | else | |
3624 | x %= y; | |
3625 | } | |
059ec3d9 PH |
3626 | } |
3627 | } | |
3628 | *sptr = s; | |
3629 | return x; | |
3630 | } | |
3631 | ||
3632 | ||
97d17305 | 3633 | static int_eximarith_t |
aa7c82b2 | 3634 | eval_op_sum(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3635 | { |
3636 | uschar *s = *sptr; | |
97d17305 | 3637 | int_eximarith_t x = eval_op_mult(&s, decimal, error); |
af561417 PH |
3638 | if (*error == NULL) |
3639 | { | |
3640 | while (*s == '+' || *s == '-') | |
3641 | { | |
3642 | int op = *s++; | |
97d17305 | 3643 | int_eximarith_t y = eval_op_mult(&s, decimal, error); |
af561417 PH |
3644 | if (*error != NULL) break; |
3645 | if (op == '+') x += y; else x -= y; | |
3646 | } | |
3647 | } | |
3648 | *sptr = s; | |
3649 | return x; | |
3650 | } | |
3651 | ||
3652 | ||
97d17305 | 3653 | static int_eximarith_t |
aa7c82b2 | 3654 | eval_op_shift(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3655 | { |
3656 | uschar *s = *sptr; | |
97d17305 | 3657 | int_eximarith_t x = eval_op_sum(&s, decimal, error); |
af561417 PH |
3658 | if (*error == NULL) |
3659 | { | |
3660 | while ((*s == '<' || *s == '>') && s[1] == s[0]) | |
3661 | { | |
97d17305 | 3662 | int_eximarith_t y; |
af561417 PH |
3663 | int op = *s++; |
3664 | s++; | |
3665 | y = eval_op_sum(&s, decimal, error); | |
3666 | if (*error != NULL) break; | |
3667 | if (op == '<') x <<= y; else x >>= y; | |
3668 | } | |
3669 | } | |
3670 | *sptr = s; | |
3671 | return x; | |
3672 | } | |
3673 | ||
3674 | ||
97d17305 | 3675 | static int_eximarith_t |
aa7c82b2 | 3676 | eval_op_and(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3677 | { |
3678 | uschar *s = *sptr; | |
97d17305 | 3679 | int_eximarith_t x = eval_op_shift(&s, decimal, error); |
af561417 PH |
3680 | if (*error == NULL) |
3681 | { | |
3682 | while (*s == '&') | |
3683 | { | |
97d17305 | 3684 | int_eximarith_t y; |
af561417 PH |
3685 | s++; |
3686 | y = eval_op_shift(&s, decimal, error); | |
3687 | if (*error != NULL) break; | |
3688 | x &= y; | |
3689 | } | |
3690 | } | |
3691 | *sptr = s; | |
3692 | return x; | |
3693 | } | |
3694 | ||
3695 | ||
97d17305 | 3696 | static int_eximarith_t |
aa7c82b2 | 3697 | eval_op_xor(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3698 | { |
3699 | uschar *s = *sptr; | |
97d17305 | 3700 | int_eximarith_t x = eval_op_and(&s, decimal, error); |
af561417 PH |
3701 | if (*error == NULL) |
3702 | { | |
3703 | while (*s == '^') | |
3704 | { | |
97d17305 | 3705 | int_eximarith_t y; |
af561417 PH |
3706 | s++; |
3707 | y = eval_op_and(&s, decimal, error); | |
3708 | if (*error != NULL) break; | |
3709 | x ^= y; | |
3710 | } | |
3711 | } | |
3712 | *sptr = s; | |
3713 | return x; | |
3714 | } | |
3715 | ||
3716 | ||
97d17305 | 3717 | static int_eximarith_t |
aa7c82b2 | 3718 | eval_op_or(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3719 | { |
3720 | uschar *s = *sptr; | |
97d17305 | 3721 | int_eximarith_t x = eval_op_xor(&s, decimal, error); |
af561417 PH |
3722 | if (*error == NULL) |
3723 | { | |
3724 | while (*s == '|') | |
3725 | { | |
97d17305 | 3726 | int_eximarith_t y; |
af561417 PH |
3727 | s++; |
3728 | y = eval_op_xor(&s, decimal, error); | |
3729 | if (*error != NULL) break; | |
3730 | x |= y; | |
3731 | } | |
3732 | } | |
3733 | *sptr = s; | |
3734 | return x; | |
3735 | } | |
3736 | ||
059ec3d9 PH |
3737 | |
3738 | ||
3739 | /************************************************* | |
3740 | * Expand string * | |
3741 | *************************************************/ | |
3742 | ||
3743 | /* Returns either an unchanged string, or the expanded string in stacking pool | |
3744 | store. Interpreted sequences are: | |
3745 | ||
3746 | \... normal escaping rules | |
3747 | $name substitutes the variable | |
3748 | ${name} ditto | |
3749 | ${op:string} operates on the expanded string value | |
3750 | ${item{arg1}{arg2}...} expands the args and then does the business | |
3751 | some literal args are not enclosed in {} | |
3752 | ||
3753 | There are now far too many operators and item types to make it worth listing | |
3754 | them here in detail any more. | |
3755 | ||
3756 | We use an internal routine recursively to handle embedded substrings. The | |
3757 | external function follows. The yield is NULL if the expansion failed, and there | |
3758 | are two cases: if something collapsed syntactically, or if "fail" was given | |
3759 | as the action on a lookup failure. These can be distinguised by looking at the | |
3760 | variable expand_string_forcedfail, which is TRUE in the latter case. | |
3761 | ||
3762 | The skipping flag is set true when expanding a substring that isn't actually | |
3763 | going to be used (after "if" or "lookup") and it prevents lookups from | |
3764 | happening lower down. | |
3765 | ||
3766 | Store usage: At start, a store block of the length of the input plus 64 | |
3767 | is obtained. This is expanded as necessary by string_cat(), which might have to | |
3768 | get a new block, or might be able to expand the original. At the end of the | |
3769 | function we can release any store above that portion of the yield block that | |
3770 | was actually used. In many cases this will be optimal. | |
3771 | ||
3772 | However: if the first item in the expansion is a variable name or header name, | |
3773 | we reset the store before processing it; if the result is in fresh store, we | |
3774 | use that without copying. This is helpful for expanding strings like | |
3775 | $message_headers which can get very long. | |
3776 | ||
d6b4d938 TF |
3777 | There's a problem if a ${dlfunc item has side-effects that cause allocation, |
3778 | since resetting the store at the end of the expansion will free store that was | |
3779 | allocated by the plugin code as well as the slop after the expanded string. So | |
b0e85a8f JH |
3780 | we skip any resets if ${dlfunc } has been used. The same applies for ${acl } |
3781 | and, given the acl condition, ${if }. This is an unfortunate consequence of | |
3782 | string expansion becoming too powerful. | |
d6b4d938 | 3783 | |
059ec3d9 PH |
3784 | Arguments: |
3785 | string the string to be expanded | |
3786 | ket_ends true if expansion is to stop at } | |
3787 | left if not NULL, a pointer to the first character after the | |
3788 | expansion is placed here (typically used with ket_ends) | |
3789 | skipping TRUE for recursive calls when the value isn't actually going | |
3790 | to be used (to allow for optimisation) | |
da6dbe26 PP |
3791 | honour_dollar TRUE if $ is to be expanded, |
3792 | FALSE if it's just another character | |
b0e85a8f JH |
3793 | resetok_p if not NULL, pointer to flag - write FALSE if unsafe to reset |
3794 | the store. | |
059ec3d9 PH |
3795 | |
3796 | Returns: NULL if expansion fails: | |
3797 | expand_string_forcedfail is set TRUE if failure was forced | |
3798 | expand_string_message contains a textual error message | |
3799 | a pointer to the expanded string on success | |
3800 | */ | |
3801 | ||
3802 | static uschar * | |
55414b25 | 3803 | expand_string_internal(const uschar *string, BOOL ket_ends, const uschar **left, |
b0e85a8f | 3804 | BOOL skipping, BOOL honour_dollar, BOOL *resetok_p) |
059ec3d9 PH |
3805 | { |
3806 | int ptr = 0; | |
3807 | int size = Ustrlen(string)+ 64; | |
3808 | int item_type; | |
3809 | uschar *yield = store_get(size); | |
55414b25 | 3810 | const uschar *s = string; |
059ec3d9 PH |
3811 | uschar *save_expand_nstring[EXPAND_MAXN+1]; |
3812 | int save_expand_nlength[EXPAND_MAXN+1]; | |
d6b4d938 | 3813 | BOOL resetok = TRUE; |
059ec3d9 PH |
3814 | |
3815 | expand_string_forcedfail = FALSE; | |
3816 | expand_string_message = US""; | |
3817 | ||
3818 | while (*s != 0) | |
3819 | { | |
3820 | uschar *value; | |
3821 | uschar name[256]; | |
3822 | ||
3823 | /* \ escapes the next character, which must exist, or else | |
3824 | the expansion fails. There's a special escape, \N, which causes | |
3825 | copying of the subject verbatim up to the next \N. Otherwise, | |
3826 | the escapes are the standard set. */ | |
3827 | ||
3828 | if (*s == '\\') | |
3829 | { | |
3830 | if (s[1] == 0) | |
3831 | { | |
3832 | expand_string_message = US"\\ at end of string"; | |
3833 | goto EXPAND_FAILED; | |
3834 | } | |
3835 | ||
3836 | if (s[1] == 'N') | |
3837 | { | |
55414b25 | 3838 | const uschar * t = s + 2; |
059ec3d9 PH |
3839 | for (s = t; *s != 0; s++) if (*s == '\\' && s[1] == 'N') break; |
3840 | yield = string_cat(yield, &size, &ptr, t, s - t); | |
3841 | if (*s != 0) s += 2; | |
3842 | } | |
3843 | ||
3844 | else | |
3845 | { | |
3846 | uschar ch[1]; | |
3847 | ch[0] = string_interpret_escape(&s); | |
3848 | s++; | |
3849 | yield = string_cat(yield, &size, &ptr, ch, 1); | |
3850 | } | |
3851 | ||
3852 | continue; | |
3853 | } | |
3854 | ||
2e23003a | 3855 | /*{*/ |
059ec3d9 PH |
3856 | /* Anything other than $ is just copied verbatim, unless we are |
3857 | looking for a terminating } character. */ | |
3858 | ||
2e23003a | 3859 | /*{*/ |
059ec3d9 PH |
3860 | if (ket_ends && *s == '}') break; |
3861 | ||
da6dbe26 | 3862 | if (*s != '$' || !honour_dollar) |
059ec3d9 PH |
3863 | { |
3864 | yield = string_cat(yield, &size, &ptr, s++, 1); | |
3865 | continue; | |
3866 | } | |
3867 | ||
3868 | /* No { after the $ - must be a plain name or a number for string | |
3869 | match variable. There has to be a fudge for variables that are the | |
3870 | names of header fields preceded by "$header_" because header field | |
3871 | names can contain any printing characters except space and colon. | |
3872 | For those that don't like typing this much, "$h_" is a synonym for | |
3873 | "$header_". A non-existent header yields a NULL value; nothing is | |
2e23003a | 3874 | inserted. */ /*}*/ |
059ec3d9 PH |
3875 | |
3876 | if (isalpha((*(++s)))) | |
3877 | { | |
3878 | int len; | |
3879 | int newsize = 0; | |
3880 | ||
3881 | s = read_name(name, sizeof(name), s, US"_"); | |
3882 | ||
3883 | /* If this is the first thing to be expanded, release the pre-allocated | |
3884 | buffer. */ | |
3885 | ||
3886 | if (ptr == 0 && yield != NULL) | |
3887 | { | |
d6b4d938 | 3888 | if (resetok) store_reset(yield); |
059ec3d9 PH |
3889 | yield = NULL; |
3890 | size = 0; | |
3891 | } | |
3892 | ||
3893 | /* Header */ | |
3894 | ||
3895 | if (Ustrncmp(name, "h_", 2) == 0 || | |
3896 | Ustrncmp(name, "rh_", 3) == 0 || | |
3897 | Ustrncmp(name, "bh_", 3) == 0 || | |
3898 | Ustrncmp(name, "header_", 7) == 0 || | |
3899 | Ustrncmp(name, "rheader_", 8) == 0 || | |
3900 | Ustrncmp(name, "bheader_", 8) == 0) | |
3901 | { | |
3902 | BOOL want_raw = (name[0] == 'r')? TRUE : FALSE; | |
3903 | uschar *charset = (name[0] == 'b')? NULL : headers_charset; | |
3904 | s = read_header_name(name, sizeof(name), s); | |
3905 | value = find_header(name, FALSE, &newsize, want_raw, charset); | |
3906 | ||
3907 | /* If we didn't find the header, and the header contains a closing brace | |
0d85fa3f | 3908 | character, this may be a user error where the terminating colon |
059ec3d9 PH |
3909 | has been omitted. Set a flag to adjust the error message in this case. |
3910 | But there is no error here - nothing gets inserted. */ | |
3911 | ||
3912 | if (value == NULL) | |
3913 | { | |
3914 | if (Ustrchr(name, '}') != NULL) malformed_header = TRUE; | |
3915 | continue; | |
3916 | } | |
3917 | } | |
3918 | ||
3919 | /* Variable */ | |
3920 | ||
3921 | else | |
3922 | { | |
3923 | value = find_variable(name, FALSE, skipping, &newsize); | |
3924 | if (value == NULL) | |
3925 | { | |
3926 | expand_string_message = | |
3927 | string_sprintf("unknown variable name \"%s\"", name); | |
641cb756 | 3928 | check_variable_error_message(name); |
059ec3d9 PH |
3929 | goto EXPAND_FAILED; |
3930 | } | |
3931 | } | |
3932 | ||
3933 | /* If the data is known to be in a new buffer, newsize will be set to the | |
3934 | size of that buffer. If this is the first thing in an expansion string, | |
3935 | yield will be NULL; just point it at the new store instead of copying. Many | |
3936 | expansion strings contain just one reference, so this is a useful | |
3937 | optimization, especially for humungous headers. */ | |
3938 | ||
3939 | len = Ustrlen(value); | |
3940 | if (yield == NULL && newsize != 0) | |
3941 | { | |
3942 | yield = value; | |
3943 | size = newsize; | |
3944 | ptr = len; | |
3945 | } | |
3946 | else yield = string_cat(yield, &size, &ptr, value, len); | |
3947 | ||
3948 | continue; | |
3949 | } | |
3950 | ||
3951 | if (isdigit(*s)) | |
3952 | { | |
3953 | int n; | |
55414b25 | 3954 | s = read_cnumber(&n, s); |
059ec3d9 PH |
3955 | if (n >= 0 && n <= expand_nmax) |
3956 | yield = string_cat(yield, &size, &ptr, expand_nstring[n], | |
3957 | expand_nlength[n]); | |
3958 | continue; | |
3959 | } | |
3960 | ||
2e23003a | 3961 | /* Otherwise, if there's no '{' after $ it's an error. */ /*}*/ |
059ec3d9 | 3962 | |
2e23003a | 3963 | if (*s != '{') /*}*/ |
059ec3d9 | 3964 | { |
2e23003a | 3965 | expand_string_message = US"$ not followed by letter, digit, or {"; /*}*/ |
059ec3d9 PH |
3966 | goto EXPAND_FAILED; |
3967 | } | |
3968 | ||
3969 | /* After { there can be various things, but they all start with | |
3970 | an initial word, except for a number for a string match variable. */ | |
3971 | ||
3972 | if (isdigit((*(++s)))) | |
3973 | { | |
3974 | int n; | |
55414b25 | 3975 | s = read_cnumber(&n, s); /*{*/ |
059ec3d9 | 3976 | if (*s++ != '}') |
2e23003a | 3977 | { /*{*/ |
059ec3d9 PH |
3978 | expand_string_message = US"} expected after number"; |
3979 | goto EXPAND_FAILED; | |
3980 | } | |
3981 | if (n >= 0 && n <= expand_nmax) | |
3982 | yield = string_cat(yield, &size, &ptr, expand_nstring[n], | |
3983 | expand_nlength[n]); | |
3984 | continue; | |
3985 | } | |
3986 | ||
3987 | if (!isalpha(*s)) | |
3988 | { | |
2e23003a | 3989 | expand_string_message = US"letter or digit expected after ${"; /*}*/ |
059ec3d9 PH |
3990 | goto EXPAND_FAILED; |
3991 | } | |
3992 | ||
3993 | /* Allow "-" in names to cater for substrings with negative | |
3994 | arguments. Since we are checking for known names after { this is | |
3995 | OK. */ | |
3996 | ||
3997 | s = read_name(name, sizeof(name), s, US"_-"); | |
0539a19d | 3998 | item_type = chop_match(name, item_table, nelem(item_table)); |
059ec3d9 PH |
3999 | |
4000 | switch(item_type) | |
4001 | { | |
525239c1 | 4002 | /* Call an ACL from an expansion. We feed data in via $acl_arg1 - $acl_arg9. |
333eea9c | 4003 | If the ACL returns accept or reject we return content set by "message =" |
723c72e6 JH |
4004 | There is currently no limit on recursion; this would have us call |
4005 | acl_check_internal() directly and get a current level from somewhere. | |
f60d98e8 JH |
4006 | See also the acl expansion condition ECOND_ACL and the traditional |
4007 | acl modifier ACLC_ACL. | |
be7a5781 | 4008 | Assume that the function has side-effects on the store that must be preserved. |
723c72e6 JH |
4009 | */ |
4010 | ||
4011 | case EITEM_ACL: | |
333eea9c | 4012 | /* ${acl {name} {arg1}{arg2}...} */ |
723c72e6 | 4013 | { |
333eea9c | 4014 | uschar *sub[10]; /* name + arg1-arg9 (which must match number of acl_arg[]) */ |
723c72e6 | 4015 | uschar *user_msg; |
333eea9c | 4016 | |
089fc87a JH |
4017 | switch(read_subs(sub, nelem(sub), 1, &s, skipping, TRUE, US"acl", |
4018 | &resetok)) | |
723c72e6 JH |
4019 | { |
4020 | case 1: goto EXPAND_FAILED_CURLY; | |
4021 | case 2: | |
4022 | case 3: goto EXPAND_FAILED; | |
4023 | } | |
4024 | if (skipping) continue; | |
4025 | ||
be7a5781 | 4026 | resetok = FALSE; |
0539a19d | 4027 | switch(eval_acl(sub, nelem(sub), &user_msg)) |
723c72e6 JH |
4028 | { |
4029 | case OK: | |
333eea9c | 4030 | case FAIL: |
187bc588 JH |
4031 | DEBUG(D_expand) |
4032 | debug_printf("acl expansion yield: %s\n", user_msg); | |
723c72e6 JH |
4033 | if (user_msg) |
4034 | yield = string_cat(yield, &size, &ptr, user_msg, Ustrlen(user_msg)); | |
4035 | continue; | |
333eea9c | 4036 | |
723c72e6 | 4037 | case DEFER: |
333eea9c | 4038 | expand_string_forcedfail = TRUE; |
723c72e6 | 4039 | default: |
333eea9c | 4040 | expand_string_message = string_sprintf("error from acl \"%s\"", sub[0]); |
723c72e6 JH |
4041 | goto EXPAND_FAILED; |
4042 | } | |
4043 | } | |
4044 | ||
059ec3d9 PH |
4045 | /* Handle conditionals - preserve the values of the numerical expansion |
4046 | variables in case they get changed by a regular expression match in the | |
4047 | condition. If not, they retain their external settings. At the end | |
4048 | of this "if" section, they get restored to their previous values. */ | |
4049 | ||
4050 | case EITEM_IF: | |
4051 | { | |
4052 | BOOL cond = FALSE; | |
55414b25 | 4053 | const uschar *next_s; |
059ec3d9 PH |
4054 | int save_expand_nmax = |
4055 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
4056 | ||
4057 | while (isspace(*s)) s++; | |
b0e85a8f | 4058 | next_s = eval_condition(s, &resetok, skipping? NULL : &cond); |
059ec3d9 PH |
4059 | if (next_s == NULL) goto EXPAND_FAILED; /* message already set */ |
4060 | ||
4061 | DEBUG(D_expand) | |
4062 | debug_printf("condition: %.*s\n result: %s\n", (int)(next_s - s), s, | |
4063 | cond? "true" : "false"); | |
4064 | ||
4065 | s = next_s; | |
4066 | ||
4067 | /* The handling of "yes" and "no" result strings is now in a separate | |
4068 | function that is also used by ${lookup} and ${extract} and ${run}. */ | |
4069 | ||
4070 | switch(process_yesno( | |
4071 | skipping, /* were previously skipping */ | |
4072 | cond, /* success/failure indicator */ | |
4073 | lookup_value, /* value to reset for string2 */ | |
4074 | &s, /* input pointer */ | |
4075 | &yield, /* output pointer */ | |
4076 | &size, /* output size */ | |
4077 | &ptr, /* output current point */ | |
b0e85a8f JH |
4078 | US"if", /* condition type */ |
4079 | &resetok)) | |
059ec3d9 PH |
4080 | { |
4081 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
4082 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
4083 | } | |
4084 | ||
4085 | /* Restore external setting of expansion variables for continuation | |
4086 | at this level. */ | |
4087 | ||
b0e85a8f JH |
4088 | restore_expand_strings(save_expand_nmax, save_expand_nstring, |
4089 | save_expand_nlength); | |
059ec3d9 PH |
4090 | continue; |
4091 | } | |
4092 | ||
ed0512a1 JH |
4093 | #ifdef EXPERIMENTAL_INTERNATIONAL |
4094 | case EITEM_IMAPFOLDER: | |
4095 | { /* ${imapfolder {name}{sep]{specials}} */ | |
4096 | uschar *sub_arg[3]; | |
4097 | uschar *encoded; | |
4098 | ||
0539a19d JH |
4099 | switch(read_subs(sub_arg, nelem(sub_arg), 1, &s, skipping, TRUE, name, |
4100 | &resetok)) | |
ed0512a1 JH |
4101 | { |
4102 | case 1: goto EXPAND_FAILED_CURLY; | |
4103 | case 2: | |
4104 | case 3: goto EXPAND_FAILED; | |
4105 | } | |
4106 | ||
4107 | if (sub_arg[1] == NULL) /* One argument */ | |
4108 | { | |
0539a19d | 4109 | sub_arg[1] = US"/"; /* default separator */ |
ed0512a1 JH |
4110 | sub_arg[2] = NULL; |
4111 | } | |
0539a19d | 4112 | else if (Ustrlen(sub_arg[1]) != 1) |
ed0512a1 | 4113 | { |
94431adb | 4114 | expand_string_message = |
ed0512a1 | 4115 | string_sprintf( |
94431adb | 4116 | "IMAP folder separator must be one character, found \"%s\"", |
ed0512a1 JH |
4117 | sub_arg[1]); |
4118 | goto EXPAND_FAILED; | |
4119 | } | |
4120 | ||
4121 | if (!(encoded = imap_utf7_encode(sub_arg[0], headers_charset, | |
4122 | sub_arg[1][0], sub_arg[2], &expand_string_message))) | |
4123 | goto EXPAND_FAILED; | |
4124 | if (!skipping) | |
4125 | yield = string_cat(yield, &size, &ptr, encoded, Ustrlen(encoded)); | |
4126 | continue; | |
4127 | } | |
4128 | #endif | |
4129 | ||
059ec3d9 PH |
4130 | /* Handle database lookups unless locked out. If "skipping" is TRUE, we are |
4131 | expanding an internal string that isn't actually going to be used. All we | |
4132 | need to do is check the syntax, so don't do a lookup at all. Preserve the | |
4133 | values of the numerical expansion variables in case they get changed by a | |
4134 | partial lookup. If not, they retain their external settings. At the end | |
4135 | of this "lookup" section, they get restored to their previous values. */ | |
4136 | ||
4137 | case EITEM_LOOKUP: | |
4138 | { | |
4139 | int stype, partial, affixlen, starflags; | |
4140 | int expand_setup = 0; | |
4141 | int nameptr = 0; | |
55414b25 JH |
4142 | uschar *key, *filename; |
4143 | const uschar *affix; | |
059ec3d9 PH |
4144 | uschar *save_lookup_value = lookup_value; |
4145 | int save_expand_nmax = | |
4146 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
4147 | ||
4148 | if ((expand_forbid & RDO_LOOKUP) != 0) | |
4149 | { | |
4150 | expand_string_message = US"lookup expansions are not permitted"; | |
4151 | goto EXPAND_FAILED; | |
4152 | } | |
4153 | ||
4154 | /* Get the key we are to look up for single-key+file style lookups. | |
4155 | Otherwise set the key NULL pro-tem. */ | |
4156 | ||
4157 | while (isspace(*s)) s++; | |
2e23003a | 4158 | if (*s == '{') /*}*/ |
059ec3d9 | 4159 | { |
b0e85a8f | 4160 | key = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
2e23003a | 4161 | if (key == NULL) goto EXPAND_FAILED; /*{*/ |
059ec3d9 PH |
4162 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; |
4163 | while (isspace(*s)) s++; | |
4164 | } | |
4165 | else key = NULL; | |
4166 | ||
4167 | /* Find out the type of database */ | |
4168 | ||
4169 | if (!isalpha(*s)) | |
4170 | { | |
4171 | expand_string_message = US"missing lookup type"; | |
4172 | goto EXPAND_FAILED; | |
4173 | } | |
4174 | ||
4175 | /* The type is a string that may contain special characters of various | |
4176 | kinds. Allow everything except space or { to appear; the actual content | |
2e23003a | 4177 | is checked by search_findtype_partial. */ /*}*/ |
059ec3d9 | 4178 | |
2e23003a | 4179 | while (*s != 0 && *s != '{' && !isspace(*s)) /*}*/ |
059ec3d9 PH |
4180 | { |
4181 | if (nameptr < sizeof(name) - 1) name[nameptr++] = *s; | |
4182 | s++; | |
4183 | } | |
4184 | name[nameptr] = 0; | |
4185 | while (isspace(*s)) s++; | |
4186 | ||
4187 | /* Now check for the individual search type and any partial or default | |
4188 | options. Only those types that are actually in the binary are valid. */ | |
4189 | ||
4190 | stype = search_findtype_partial(name, &partial, &affix, &affixlen, | |
4191 | &starflags); | |
4192 | if (stype < 0) | |
4193 | { | |
4194 | expand_string_message = search_error_message; | |
4195 | goto EXPAND_FAILED; | |
4196 | } | |
4197 | ||
4198 | /* Check that a key was provided for those lookup types that need it, | |
4199 | and was not supplied for those that use the query style. */ | |
4200 | ||
13b685f9 | 4201 | if (!mac_islookup(stype, lookup_querystyle|lookup_absfilequery)) |
059ec3d9 PH |
4202 | { |
4203 | if (key == NULL) | |
4204 | { | |
4205 | expand_string_message = string_sprintf("missing {key} for single-" | |
4206 | "key \"%s\" lookup", name); | |
4207 | goto EXPAND_FAILED; | |
4208 | } | |
4209 | } | |
4210 | else | |
4211 | { | |
4212 | if (key != NULL) | |
4213 | { | |
4214 | expand_string_message = string_sprintf("a single key was given for " | |
4215 | "lookup type \"%s\", which is not a single-key lookup type", name); | |
4216 | goto EXPAND_FAILED; | |
4217 | } | |
4218 | } | |
4219 | ||
4220 | /* Get the next string in brackets and expand it. It is the file name for | |
13b685f9 PH |
4221 | single-key+file lookups, and the whole query otherwise. In the case of |
4222 | queries that also require a file name (e.g. sqlite), the file name comes | |
4223 | first. */ | |
059ec3d9 PH |
4224 | |
4225 | if (*s != '{') goto EXPAND_FAILED_CURLY; | |
b0e85a8f | 4226 | filename = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
059ec3d9 PH |
4227 | if (filename == NULL) goto EXPAND_FAILED; |
4228 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4229 | while (isspace(*s)) s++; | |
4230 | ||
4231 | /* If this isn't a single-key+file lookup, re-arrange the variables | |
13b685f9 PH |
4232 | to be appropriate for the search_ functions. For query-style lookups, |
4233 | there is just a "key", and no file name. For the special query-style + | |
4234 | file types, the query (i.e. "key") starts with a file name. */ | |
059ec3d9 PH |
4235 | |
4236 | if (key == NULL) | |
4237 | { | |
13b685f9 | 4238 | while (isspace(*filename)) filename++; |
059ec3d9 | 4239 | key = filename; |
13b685f9 PH |
4240 | |
4241 | if (mac_islookup(stype, lookup_querystyle)) | |
4242 | { | |
4243 | filename = NULL; | |
4244 | } | |
4245 | else | |
4246 | { | |
4247 | if (*filename != '/') | |
4248 | { | |
4249 | expand_string_message = string_sprintf( | |
4250 | "absolute file name expected for \"%s\" lookup", name); | |
4251 | goto EXPAND_FAILED; | |
4252 | } | |
4253 | while (*key != 0 && !isspace(*key)) key++; | |
4254 | if (*key != 0) *key++ = 0; | |
4255 | } | |
059ec3d9 PH |
4256 | } |
4257 | ||
4258 | /* If skipping, don't do the next bit - just lookup_value == NULL, as if | |
4259 | the entry was not found. Note that there is no search_close() function. | |
4260 | Files are left open in case of re-use. At suitable places in higher logic, | |
4261 | search_tidyup() is called to tidy all open files. This can save opening | |
4262 | the same file several times. However, files may also get closed when | |
4263 | others are opened, if too many are open at once. The rule is that a | |
4264 | handle should not be used after a second search_open(). | |
4265 | ||
4266 | Request that a partial search sets up $1 and maybe $2 by passing | |
4267 | expand_setup containing zero. If its value changes, reset expand_nmax, | |
4268 | since new variables will have been set. Note that at the end of this | |
4269 | "lookup" section, the old numeric variables are restored. */ | |
4270 | ||
4271 | if (skipping) | |
4272 | lookup_value = NULL; | |
4273 | else | |
4274 | { | |
4275 | void *handle = search_open(filename, stype, 0, NULL, NULL); | |
4276 | if (handle == NULL) | |
4277 | { | |
4278 | expand_string_message = search_error_message; | |
4279 | goto EXPAND_FAILED; | |
4280 | } | |
4281 | lookup_value = search_find(handle, filename, key, partial, affix, | |
4282 | affixlen, starflags, &expand_setup); | |
4283 | if (search_find_defer) | |
4284 | { | |
4285 | expand_string_message = | |
b72aab72 PP |
4286 | string_sprintf("lookup of \"%s\" gave DEFER: %s", |
4287 | string_printing2(key, FALSE), search_error_message); | |
059ec3d9 PH |
4288 | goto EXPAND_FAILED; |
4289 | } | |
4290 | if (expand_setup > 0) expand_nmax = expand_setup; | |
4291 | } | |
4292 | ||
4293 | /* The handling of "yes" and "no" result strings is now in a separate | |
4294 | function that is also used by ${if} and ${extract}. */ | |
4295 | ||
4296 | switch(process_yesno( | |
4297 | skipping, /* were previously skipping */ | |
4298 | lookup_value != NULL, /* success/failure indicator */ | |
4299 | save_lookup_value, /* value to reset for string2 */ | |
4300 | &s, /* input pointer */ | |
4301 | &yield, /* output pointer */ | |
4302 | &size, /* output size */ | |
4303 | &ptr, /* output current point */ | |
b0e85a8f JH |
4304 | US"lookup", /* condition type */ |
4305 | &resetok)) | |
059ec3d9 PH |
4306 | { |
4307 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
4308 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
4309 | } | |
4310 | ||
4311 | /* Restore external setting of expansion variables for carrying on | |
4312 | at this level, and continue. */ | |
4313 | ||
4314 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
4315 | save_expand_nlength); | |
4316 | continue; | |
4317 | } | |
4318 | ||
4319 | /* If Perl support is configured, handle calling embedded perl subroutines, | |
4320 | unless locked out at this time. Syntax is ${perl{sub}} or ${perl{sub}{arg}} | |
4321 | or ${perl{sub}{arg1}{arg2}} or up to a maximum of EXIM_PERL_MAX_ARGS | |
4322 | arguments (defined below). */ | |
4323 | ||
059ec3d9 PH |
4324 | #define EXIM_PERL_MAX_ARGS 8 |
4325 | ||
4326 | case EITEM_PERL: | |
1a46a8c5 | 4327 | #ifndef EXIM_PERL |
2e23003a | 4328 | expand_string_message = US"\"${perl\" encountered, but this facility " /*}*/ |
1a46a8c5 PH |
4329 | "is not included in this binary"; |
4330 | goto EXPAND_FAILED; | |
4331 | ||
4332 | #else /* EXIM_PERL */ | |
059ec3d9 PH |
4333 | { |
4334 | uschar *sub_arg[EXIM_PERL_MAX_ARGS + 2]; | |
4335 | uschar *new_yield; | |
4336 | ||
4337 | if ((expand_forbid & RDO_PERL) != 0) | |
4338 | { | |
4339 | expand_string_message = US"Perl calls are not permitted"; | |
4340 | goto EXPAND_FAILED; | |
4341 | } | |
4342 | ||
4343 | switch(read_subs(sub_arg, EXIM_PERL_MAX_ARGS + 1, 1, &s, skipping, TRUE, | |
b0e85a8f | 4344 | US"perl", &resetok)) |
059ec3d9 PH |
4345 | { |
4346 | case 1: goto EXPAND_FAILED_CURLY; | |
4347 | case 2: | |
4348 | case 3: goto EXPAND_FAILED; | |
4349 | } | |
4350 | ||
4351 | /* If skipping, we don't actually do anything */ | |
4352 | ||
4353 | if (skipping) continue; | |
4354 | ||
4355 | /* Start the interpreter if necessary */ | |
4356 | ||
4357 | if (!opt_perl_started) | |
4358 | { | |
4359 | uschar *initerror; | |
4360 | if (opt_perl_startup == NULL) | |
4361 | { | |
4362 | expand_string_message = US"A setting of perl_startup is needed when " | |
4363 | "using the Perl interpreter"; | |
4364 | goto EXPAND_FAILED; | |
4365 | } | |
4366 | DEBUG(D_any) debug_printf("Starting Perl interpreter\n"); | |
4367 | initerror = init_perl(opt_perl_startup); | |
4368 | if (initerror != NULL) | |
4369 | { | |
4370 | expand_string_message = | |
4371 | string_sprintf("error in perl_startup code: %s\n", initerror); | |
4372 | goto EXPAND_FAILED; | |
4373 | } | |
4374 | opt_perl_started = TRUE; | |
4375 | } | |
4376 | ||
4377 | /* Call the function */ | |
4378 | ||
4379 | sub_arg[EXIM_PERL_MAX_ARGS + 1] = NULL; | |
4380 | new_yield = call_perl_cat(yield, &size, &ptr, &expand_string_message, | |
4381 | sub_arg[0], sub_arg + 1); | |
4382 | ||
4383 | /* NULL yield indicates failure; if the message pointer has been set to | |
4384 | NULL, the yield was undef, indicating a forced failure. Otherwise the | |
4385 | message will indicate some kind of Perl error. */ | |
4386 | ||
4387 | if (new_yield == NULL) | |
4388 | { | |
4389 | if (expand_string_message == NULL) | |
4390 | { | |
4391 | expand_string_message = | |
4392 | string_sprintf("Perl subroutine \"%s\" returned undef to force " | |
4393 | "failure", sub_arg[0]); | |
4394 | expand_string_forcedfail = TRUE; | |
4395 | } | |
4396 | goto EXPAND_FAILED; | |
4397 | } | |
4398 | ||
4399 | /* Yield succeeded. Ensure forcedfail is unset, just in case it got | |
4400 | set during a callback from Perl. */ | |
4401 | ||
4402 | expand_string_forcedfail = FALSE; | |
4403 | yield = new_yield; | |
4404 | continue; | |
4405 | } | |
4406 | #endif /* EXIM_PERL */ | |
4407 | ||
fffda43a TK |
4408 | /* Transform email address to "prvs" scheme to use |
4409 | as BATV-signed return path */ | |
4410 | ||
4411 | case EITEM_PRVS: | |
4412 | { | |
4413 | uschar *sub_arg[3]; | |
4414 | uschar *p,*domain; | |
4415 | ||
b0e85a8f | 4416 | switch(read_subs(sub_arg, 3, 2, &s, skipping, TRUE, US"prvs", &resetok)) |
fffda43a TK |
4417 | { |
4418 | case 1: goto EXPAND_FAILED_CURLY; | |
4419 | case 2: | |
4420 | case 3: goto EXPAND_FAILED; | |
4421 | } | |
4422 | ||
4423 | /* If skipping, we don't actually do anything */ | |
4424 | if (skipping) continue; | |
4425 | ||
4426 | /* sub_arg[0] is the address */ | |
4427 | domain = Ustrrchr(sub_arg[0],'@'); | |
4428 | if ( (domain == NULL) || (domain == sub_arg[0]) || (Ustrlen(domain) == 1) ) | |
4429 | { | |
cb9328de PH |
4430 | expand_string_message = US"prvs first argument must be a qualified email address"; |
4431 | goto EXPAND_FAILED; | |
4432 | } | |
4433 | ||
4434 | /* Calculate the hash. The second argument must be a single-digit | |
4435 | key number, or unset. */ | |
4436 | ||
4437 | if (sub_arg[2] != NULL && | |
4438 | (!isdigit(sub_arg[2][0]) || sub_arg[2][1] != 0)) | |
4439 | { | |
4440 | expand_string_message = US"prvs second argument must be a single digit"; | |
fffda43a TK |
4441 | goto EXPAND_FAILED; |
4442 | } | |
4443 | ||
fffda43a TK |
4444 | p = prvs_hmac_sha1(sub_arg[0],sub_arg[1],sub_arg[2],prvs_daystamp(7)); |
4445 | if (p == NULL) | |
4446 | { | |
cb9328de | 4447 | expand_string_message = US"prvs hmac-sha1 conversion failed"; |
fffda43a TK |
4448 | goto EXPAND_FAILED; |
4449 | } | |
4450 | ||
4451 | /* Now separate the domain from the local part */ | |
4452 | *domain++ = '\0'; | |
4453 | ||
4454 | yield = string_cat(yield,&size,&ptr,US"prvs=",5); | |
fffda43a TK |
4455 | string_cat(yield,&size,&ptr,(sub_arg[2] != NULL) ? sub_arg[2] : US"0", 1); |
4456 | string_cat(yield,&size,&ptr,prvs_daystamp(7),3); | |
4457 | string_cat(yield,&size,&ptr,p,6); | |
a48ced90 TK |
4458 | string_cat(yield,&size,&ptr,US"=",1); |
4459 | string_cat(yield,&size,&ptr,sub_arg[0],Ustrlen(sub_arg[0])); | |
fffda43a TK |
4460 | string_cat(yield,&size,&ptr,US"@",1); |
4461 | string_cat(yield,&size,&ptr,domain,Ustrlen(domain)); | |
4462 | ||
4463 | continue; | |
4464 | } | |
4465 | ||
4466 | /* Check a prvs-encoded address for validity */ | |
4467 | ||
4468 | case EITEM_PRVSCHECK: | |
4469 | { | |
4470 | uschar *sub_arg[3]; | |
4471 | int mysize = 0, myptr = 0; | |
4472 | const pcre *re; | |
4473 | uschar *p; | |
72fdd6ae PH |
4474 | |
4475 | /* TF: Ugliness: We want to expand parameter 1 first, then set | |
fffda43a TK |
4476 | up expansion variables that are used in the expansion of |
4477 | parameter 2. So we clone the string for the first | |
72fdd6ae PH |
4478 | expansion, where we only expand parameter 1. |
4479 | ||
4480 | PH: Actually, that isn't necessary. The read_subs() function is | |
4481 | designed to work this way for the ${if and ${lookup expansions. I've | |
4482 | tidied the code. | |
4483 | */ | |
fffda43a TK |
4484 | |
4485 | /* Reset expansion variables */ | |
4486 | prvscheck_result = NULL; | |
4487 | prvscheck_address = NULL; | |
4488 | prvscheck_keynum = NULL; | |
4489 | ||
b0e85a8f | 4490 | switch(read_subs(sub_arg, 1, 1, &s, skipping, FALSE, US"prvs", &resetok)) |
fffda43a TK |
4491 | { |
4492 | case 1: goto EXPAND_FAILED_CURLY; | |
4493 | case 2: | |
4494 | case 3: goto EXPAND_FAILED; | |
4495 | } | |
4496 | ||
a48ced90 | 4497 | re = regex_must_compile(US"^prvs\\=([0-9])([0-9]{3})([A-F0-9]{6})\\=(.+)\\@(.+)$", |
fffda43a TK |
4498 | TRUE,FALSE); |
4499 | ||
72fdd6ae PH |
4500 | if (regex_match_and_setup(re,sub_arg[0],0,-1)) |
4501 | { | |
a48ced90 TK |
4502 | uschar *local_part = string_copyn(expand_nstring[4],expand_nlength[4]); |
4503 | uschar *key_num = string_copyn(expand_nstring[1],expand_nlength[1]); | |
4504 | uschar *daystamp = string_copyn(expand_nstring[2],expand_nlength[2]); | |
4505 | uschar *hash = string_copyn(expand_nstring[3],expand_nlength[3]); | |
fffda43a TK |
4506 | uschar *domain = string_copyn(expand_nstring[5],expand_nlength[5]); |
4507 | ||
4508 | DEBUG(D_expand) debug_printf("prvscheck localpart: %s\n", local_part); | |
4509 | DEBUG(D_expand) debug_printf("prvscheck key number: %s\n", key_num); | |
4510 | DEBUG(D_expand) debug_printf("prvscheck daystamp: %s\n", daystamp); | |
4511 | DEBUG(D_expand) debug_printf("prvscheck hash: %s\n", hash); | |
4512 | DEBUG(D_expand) debug_printf("prvscheck domain: %s\n", domain); | |
4513 | ||
4514 | /* Set up expansion variables */ | |
4515 | prvscheck_address = string_cat(NULL, &mysize, &myptr, local_part, Ustrlen(local_part)); | |
2740a2ca | 4516 | string_cat(prvscheck_address,&mysize,&myptr,US"@",1); |
fffda43a TK |
4517 | string_cat(prvscheck_address,&mysize,&myptr,domain,Ustrlen(domain)); |
4518 | prvscheck_address[myptr] = '\0'; | |
4519 | prvscheck_keynum = string_copy(key_num); | |
4520 | ||
72fdd6ae | 4521 | /* Now expand the second argument */ |
b0e85a8f | 4522 | switch(read_subs(sub_arg, 1, 1, &s, skipping, FALSE, US"prvs", &resetok)) |
fffda43a TK |
4523 | { |
4524 | case 1: goto EXPAND_FAILED_CURLY; | |
4525 | case 2: | |
4526 | case 3: goto EXPAND_FAILED; | |
4527 | } | |
4528 | ||
fffda43a | 4529 | /* Now we have the key and can check the address. */ |
72fdd6ae PH |
4530 | |
4531 | p = prvs_hmac_sha1(prvscheck_address, sub_arg[0], prvscheck_keynum, | |
4532 | daystamp); | |
4533 | ||
fffda43a TK |
4534 | if (p == NULL) |
4535 | { | |
4536 | expand_string_message = US"hmac-sha1 conversion failed"; | |
4537 | goto EXPAND_FAILED; | |
4538 | } | |
4539 | ||
4540 | DEBUG(D_expand) debug_printf("prvscheck: received hash is %s\n", hash); | |
4541 | DEBUG(D_expand) debug_printf("prvscheck: own hash is %s\n", p); | |
72fdd6ae | 4542 | |
fffda43a TK |
4543 | if (Ustrcmp(p,hash) == 0) |
4544 | { | |
4545 | /* Success, valid BATV address. Now check the expiry date. */ | |
4546 | uschar *now = prvs_daystamp(0); | |
4547 | unsigned int inow = 0,iexpire = 1; | |
4548 | ||
ff790e47 PH |
4549 | (void)sscanf(CS now,"%u",&inow); |
4550 | (void)sscanf(CS daystamp,"%u",&iexpire); | |
fffda43a TK |
4551 | |
4552 | /* When "iexpire" is < 7, a "flip" has occured. | |
4553 | Adjust "inow" accordingly. */ | |
4554 | if ( (iexpire < 7) && (inow >= 993) ) inow = 0; | |
4555 | ||
686c36b7 | 4556 | if (iexpire >= inow) |
fffda43a TK |
4557 | { |
4558 | prvscheck_result = US"1"; | |
4559 | DEBUG(D_expand) debug_printf("prvscheck: success, $pvrs_result set to 1\n"); | |
4560 | } | |
4561 | else | |
4562 | { | |
4563 | prvscheck_result = NULL; | |
4564 | DEBUG(D_expand) debug_printf("prvscheck: signature expired, $pvrs_result unset\n"); | |
4565 | } | |
4566 | } | |
4567 | else | |
4568 | { | |
4569 | prvscheck_result = NULL; | |
4570 | DEBUG(D_expand) debug_printf("prvscheck: hash failure, $pvrs_result unset\n"); | |
4571 | } | |
72fdd6ae PH |
4572 | |
4573 | /* Now expand the final argument. We leave this till now so that | |
4574 | it can include $prvscheck_result. */ | |
4575 | ||
b0e85a8f | 4576 | switch(read_subs(sub_arg, 1, 0, &s, skipping, TRUE, US"prvs", &resetok)) |
72fdd6ae PH |
4577 | { |
4578 | case 1: goto EXPAND_FAILED_CURLY; | |
4579 | case 2: | |
4580 | case 3: goto EXPAND_FAILED; | |
4581 | } | |
4582 | ||
4583 | if (sub_arg[0] == NULL || *sub_arg[0] == '\0') | |
4584 | yield = string_cat(yield,&size,&ptr,prvscheck_address,Ustrlen(prvscheck_address)); | |
4585 | else | |
4586 | yield = string_cat(yield,&size,&ptr,sub_arg[0],Ustrlen(sub_arg[0])); | |
4587 | ||
4588 | /* Reset the "internal" variables afterwards, because they are in | |
4589 | dynamic store that will be reclaimed if the expansion succeeded. */ | |
4590 | ||
4591 | prvscheck_address = NULL; | |
4592 | prvscheck_keynum = NULL; | |
4593 | } | |
fffda43a TK |
4594 | else |
4595 | { | |
4596 | /* Does not look like a prvs encoded address, return the empty string. | |
72fdd6ae PH |
4597 | We need to make sure all subs are expanded first, so as to skip over |
4598 | the entire item. */ | |
4599 | ||
b0e85a8f | 4600 | switch(read_subs(sub_arg, 2, 1, &s, skipping, TRUE, US"prvs", &resetok)) |
fffda43a TK |
4601 | { |
4602 | case 1: goto EXPAND_FAILED_CURLY; | |
4603 | case 2: | |
4604 | case 3: goto EXPAND_FAILED; | |
4605 | } | |
4606 | } | |
4607 | ||
4608 | continue; | |
4609 | } | |
4610 | ||
059ec3d9 PH |
4611 | /* Handle "readfile" to insert an entire file */ |
4612 | ||
4613 | case EITEM_READFILE: | |
4614 | { | |
4615 | FILE *f; | |
4616 | uschar *sub_arg[2]; | |
4617 | ||
4618 | if ((expand_forbid & RDO_READFILE) != 0) | |
4619 | { | |
4620 | expand_string_message = US"file insertions are not permitted"; | |
4621 | goto EXPAND_FAILED; | |
4622 | } | |
4623 | ||
b0e85a8f | 4624 | switch(read_subs(sub_arg, 2, 1, &s, skipping, TRUE, US"readfile", &resetok)) |
059ec3d9 PH |
4625 | { |
4626 | case 1: goto EXPAND_FAILED_CURLY; | |
4627 | case 2: | |
4628 | case 3: goto EXPAND_FAILED; | |
4629 | } | |
4630 | ||
4631 | /* If skipping, we don't actually do anything */ | |
4632 | ||
4633 | if (skipping) continue; | |
4634 | ||
4635 | /* Open the file and read it */ | |
4636 | ||
4637 | f = Ufopen(sub_arg[0], "rb"); | |
4638 | if (f == NULL) | |
4639 | { | |
4640 | expand_string_message = string_open_failed(errno, "%s", sub_arg[0]); | |
4641 | goto EXPAND_FAILED; | |
4642 | } | |
4643 | ||
4644 | yield = cat_file(f, yield, &size, &ptr, sub_arg[1]); | |
f1e894f3 | 4645 | (void)fclose(f); |
059ec3d9 PH |
4646 | continue; |
4647 | } | |
4648 | ||
4649 | /* Handle "readsocket" to insert data from a Unix domain socket */ | |
4650 | ||
4651 | case EITEM_READSOCK: | |
4652 | { | |
4653 | int fd; | |
4654 | int timeout = 5; | |
4655 | int save_ptr = ptr; | |
4656 | FILE *f; | |
4657 | struct sockaddr_un sockun; /* don't call this "sun" ! */ | |
4658 | uschar *arg; | |
4659 | uschar *sub_arg[4]; | |
4660 | ||
4661 | if ((expand_forbid & RDO_READSOCK) != 0) | |
4662 | { | |
4663 | expand_string_message = US"socket insertions are not permitted"; | |
4664 | goto EXPAND_FAILED; | |
4665 | } | |
4666 | ||
4667 | /* Read up to 4 arguments, but don't do the end of item check afterwards, | |
4668 | because there may be a string for expansion on failure. */ | |
4669 | ||
b0e85a8f | 4670 | switch(read_subs(sub_arg, 4, 2, &s, skipping, FALSE, US"readsocket", &resetok)) |
059ec3d9 PH |
4671 | { |
4672 | case 1: goto EXPAND_FAILED_CURLY; | |
4673 | case 2: /* Won't occur: no end check */ | |
4674 | case 3: goto EXPAND_FAILED; | |
4675 | } | |
4676 | ||
4677 | /* Sort out timeout, if given */ | |
4678 | ||
4679 | if (sub_arg[2] != NULL) | |
4680 | { | |
4681 | timeout = readconf_readtime(sub_arg[2], 0, FALSE); | |
4682 | if (timeout < 0) | |
4683 | { | |
4684 | expand_string_message = string_sprintf("bad time value %s", | |
4685 | sub_arg[2]); | |
4686 | goto EXPAND_FAILED; | |
4687 | } | |
4688 | } | |
4689 | else sub_arg[3] = NULL; /* No eol if no timeout */ | |
4690 | ||
1cce3af8 PH |
4691 | /* If skipping, we don't actually do anything. Otherwise, arrange to |
4692 | connect to either an IP or a Unix socket. */ | |
059ec3d9 PH |
4693 | |
4694 | if (!skipping) | |
4695 | { | |
1cce3af8 | 4696 | /* Handle an IP (internet) domain */ |
059ec3d9 | 4697 | |
91ecef39 | 4698 | if (Ustrncmp(sub_arg[0], "inet:", 5) == 0) |
059ec3d9 | 4699 | { |
b1f8e4f8 | 4700 | int port; |
1cce3af8 PH |
4701 | uschar *server_name = sub_arg[0] + 5; |
4702 | uschar *port_name = Ustrrchr(server_name, ':'); | |
4703 | ||
4704 | /* Sort out the port */ | |
4705 | ||
4706 | if (port_name == NULL) | |
4707 | { | |
4708 | expand_string_message = | |
4709 | string_sprintf("missing port for readsocket %s", sub_arg[0]); | |
4710 | goto EXPAND_FAILED; | |
4711 | } | |
4712 | *port_name++ = 0; /* Terminate server name */ | |
4713 | ||
4714 | if (isdigit(*port_name)) | |
4715 | { | |
4716 | uschar *end; | |
4717 | port = Ustrtol(port_name, &end, 0); | |
4718 | if (end != port_name + Ustrlen(port_name)) | |
4719 | { | |
4720 | expand_string_message = | |
4721 | string_sprintf("invalid port number %s", port_name); | |
4722 | goto EXPAND_FAILED; | |
4723 | } | |
4724 | } | |
4725 | else | |
4726 | { | |
4727 | struct servent *service_info = getservbyname(CS port_name, "tcp"); | |
4728 | if (service_info == NULL) | |
4729 | { | |
4730 | expand_string_message = string_sprintf("unknown port \"%s\"", | |
4731 | port_name); | |
4732 | goto EXPAND_FAILED; | |
4733 | } | |
4734 | port = ntohs(service_info->s_port); | |
4735 | } | |
4736 | ||
b1f8e4f8 JH |
4737 | if ((fd = ip_connectedsocket(SOCK_STREAM, server_name, port, port, |
4738 | timeout, NULL, &expand_string_message)) < 0) | |
1cce3af8 | 4739 | goto SOCK_FAIL; |
059ec3d9 PH |
4740 | } |
4741 | ||
1cce3af8 PH |
4742 | /* Handle a Unix domain socket */ |
4743 | ||
4744 | else | |
059ec3d9 | 4745 | { |
a401ddaa | 4746 | int rc; |
1cce3af8 PH |
4747 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) == -1) |
4748 | { | |
4749 | expand_string_message = string_sprintf("failed to create socket: %s", | |
4750 | strerror(errno)); | |
4751 | goto SOCK_FAIL; | |
4752 | } | |
4753 | ||
4754 | sockun.sun_family = AF_UNIX; | |
4755 | sprintf(sockun.sun_path, "%.*s", (int)(sizeof(sockun.sun_path)-1), | |
4756 | sub_arg[0]); | |
a401ddaa PH |
4757 | |
4758 | sigalrm_seen = FALSE; | |
4759 | alarm(timeout); | |
4760 | rc = connect(fd, (struct sockaddr *)(&sockun), sizeof(sockun)); | |
4761 | alarm(0); | |
734e1499 | 4762 | if (sigalrm_seen) |
1cce3af8 | 4763 | { |
734e1499 | 4764 | expand_string_message = US "socket connect timed out"; |
1cce3af8 PH |
4765 | goto SOCK_FAIL; |
4766 | } | |
734e1499 | 4767 | if (rc < 0) |
a401ddaa | 4768 | { |
734e1499 PH |
4769 | expand_string_message = string_sprintf("failed to connect to socket " |
4770 | "%s: %s", sub_arg[0], strerror(errno)); | |
a401ddaa PH |
4771 | goto SOCK_FAIL; |
4772 | } | |
059ec3d9 | 4773 | } |
1cce3af8 | 4774 | |
059ec3d9 PH |
4775 | DEBUG(D_expand) debug_printf("connected to socket %s\n", sub_arg[0]); |
4776 | ||
567e584c JH |
4777 | /* Allow sequencing of test actions */ |
4778 | if (running_in_test_harness) millisleep(100); | |
4779 | ||
059ec3d9 PH |
4780 | /* Write the request string, if not empty */ |
4781 | ||
4782 | if (sub_arg[1][0] != 0) | |
4783 | { | |
4784 | int len = Ustrlen(sub_arg[1]); | |
4785 | DEBUG(D_expand) debug_printf("writing \"%s\" to socket\n", | |
4786 | sub_arg[1]); | |
4787 | if (write(fd, sub_arg[1], len) != len) | |
4788 | { | |
4789 | expand_string_message = string_sprintf("request write to socket " | |
4790 | "failed: %s", strerror(errno)); | |
4791 | goto SOCK_FAIL; | |
4792 | } | |
4793 | } | |
4794 | ||
c1114884 PH |
4795 | /* Shut down the sending side of the socket. This helps some servers to |
4796 | recognise that it is their turn to do some work. Just in case some | |
4797 | system doesn't have this function, make it conditional. */ | |
4798 | ||
4799 | #ifdef SHUT_WR | |
4800 | shutdown(fd, SHUT_WR); | |
4801 | #endif | |
4802 | ||
567e584c JH |
4803 | if (running_in_test_harness) millisleep(100); |
4804 | ||
059ec3d9 PH |
4805 | /* Now we need to read from the socket, under a timeout. The function |
4806 | that reads a file can be used. */ | |
4807 | ||
4808 | f = fdopen(fd, "rb"); | |
4809 | sigalrm_seen = FALSE; | |
4810 | alarm(timeout); | |
4811 | yield = cat_file(f, yield, &size, &ptr, sub_arg[3]); | |
4812 | alarm(0); | |
f1e894f3 | 4813 | (void)fclose(f); |
059ec3d9 PH |
4814 | |
4815 | /* After a timeout, we restore the pointer in the result, that is, | |
4816 | make sure we add nothing from the socket. */ | |
4817 | ||
4818 | if (sigalrm_seen) | |
4819 | { | |
4820 | ptr = save_ptr; | |
1cce3af8 | 4821 | expand_string_message = US "socket read timed out"; |
059ec3d9 PH |
4822 | goto SOCK_FAIL; |
4823 | } | |
4824 | } | |
4825 | ||
4826 | /* The whole thing has worked (or we were skipping). If there is a | |
4827 | failure string following, we need to skip it. */ | |
4828 | ||
4829 | if (*s == '{') | |
4830 | { | |
b0e85a8f | 4831 | if (expand_string_internal(s+1, TRUE, &s, TRUE, TRUE, &resetok) == NULL) |
059ec3d9 PH |
4832 | goto EXPAND_FAILED; |
4833 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4834 | while (isspace(*s)) s++; | |
4835 | } | |
4836 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4837 | continue; | |
4838 | ||
4839 | /* Come here on failure to create socket, connect socket, write to the | |
4840 | socket, or timeout on reading. If another substring follows, expand and | |
4841 | use it. Otherwise, those conditions give expand errors. */ | |
4842 | ||
4843 | SOCK_FAIL: | |
4844 | if (*s != '{') goto EXPAND_FAILED; | |
4845 | DEBUG(D_any) debug_printf("%s\n", expand_string_message); | |
b0e85a8f | 4846 | arg = expand_string_internal(s+1, TRUE, &s, FALSE, TRUE, &resetok); |
059ec3d9 PH |
4847 | if (arg == NULL) goto EXPAND_FAILED; |
4848 | yield = string_cat(yield, &size, &ptr, arg, Ustrlen(arg)); | |
4849 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4850 | while (isspace(*s)) s++; | |
4851 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4852 | continue; | |
4853 | } | |
4854 | ||
4855 | /* Handle "run" to execute a program. */ | |
4856 | ||
4857 | case EITEM_RUN: | |
4858 | { | |
4859 | FILE *f; | |
059ec3d9 | 4860 | uschar *arg; |
55414b25 | 4861 | const uschar **argv; |
059ec3d9 PH |
4862 | pid_t pid; |
4863 | int fd_in, fd_out; | |
4864 | int lsize = 0; | |
4865 | int lptr = 0; | |
4866 | ||
4867 | if ((expand_forbid & RDO_RUN) != 0) | |
4868 | { | |
4869 | expand_string_message = US"running a command is not permitted"; | |
4870 | goto EXPAND_FAILED; | |
4871 | } | |
4872 | ||
4873 | while (isspace(*s)) s++; | |
4874 | if (*s != '{') goto EXPAND_FAILED_CURLY; | |
b0e85a8f | 4875 | arg = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
059ec3d9 PH |
4876 | if (arg == NULL) goto EXPAND_FAILED; |
4877 | while (isspace(*s)) s++; | |
4878 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4879 | ||
4880 | if (skipping) /* Just pretend it worked when we're skipping */ | |
4881 | { | |
4882 | runrc = 0; | |
4883 | } | |
4884 | else | |
4885 | { | |
4886 | if (!transport_set_up_command(&argv, /* anchor for arg list */ | |
4887 | arg, /* raw command */ | |
4888 | FALSE, /* don't expand the arguments */ | |
4889 | 0, /* not relevant when... */ | |
4890 | NULL, /* no transporting address */ | |
4891 | US"${run} expansion", /* for error messages */ | |
4892 | &expand_string_message)) /* where to put error message */ | |
4893 | { | |
4894 | goto EXPAND_FAILED; | |
4895 | } | |
4896 | ||
4897 | /* Create the child process, making it a group leader. */ | |
4898 | ||
55414b25 | 4899 | pid = child_open(USS argv, NULL, 0077, &fd_in, &fd_out, TRUE); |
059ec3d9 PH |
4900 | |
4901 | if (pid < 0) | |
4902 | { | |
4903 | expand_string_message = | |
4904 | string_sprintf("couldn't create child process: %s", strerror(errno)); | |
4905 | goto EXPAND_FAILED; | |
4906 | } | |
4907 | ||
4908 | /* Nothing is written to the standard input. */ | |
4909 | ||
f1e894f3 | 4910 | (void)close(fd_in); |
059ec3d9 | 4911 | |
ac53fcda PP |
4912 | /* Read the pipe to get the command's output into $value (which is kept |
4913 | in lookup_value). Read during execution, so that if the output exceeds | |
4914 | the OS pipe buffer limit, we don't block forever. */ | |
4915 | ||
4916 | f = fdopen(fd_out, "rb"); | |
4917 | sigalrm_seen = FALSE; | |
4918 | alarm(60); | |
4919 | lookup_value = cat_file(f, lookup_value, &lsize, &lptr, NULL); | |
4920 | alarm(0); | |
4921 | (void)fclose(f); | |
4922 | ||
059ec3d9 PH |
4923 | /* Wait for the process to finish, applying the timeout, and inspect its |
4924 | return code for serious disasters. Simple non-zero returns are passed on. | |
4925 | */ | |
4926 | ||
ac53fcda | 4927 | if (sigalrm_seen == TRUE || (runrc = child_close(pid, 30)) < 0) |
059ec3d9 | 4928 | { |
ac53fcda | 4929 | if (sigalrm_seen == TRUE || runrc == -256) |
059ec3d9 PH |
4930 | { |
4931 | expand_string_message = string_sprintf("command timed out"); | |
4932 | killpg(pid, SIGKILL); /* Kill the whole process group */ | |
4933 | } | |
4934 | ||
4935 | else if (runrc == -257) | |
4936 | expand_string_message = string_sprintf("wait() failed: %s", | |
4937 | strerror(errno)); | |
4938 | ||
4939 | else | |
4940 | expand_string_message = string_sprintf("command killed by signal %d", | |
4941 | -runrc); | |
4942 | ||
4943 | goto EXPAND_FAILED; | |
4944 | } | |
059ec3d9 PH |
4945 | } |
4946 | ||
d20976dc | 4947 | /* Process the yes/no strings; $value may be useful in both cases */ |
059ec3d9 PH |
4948 | |
4949 | switch(process_yesno( | |
4950 | skipping, /* were previously skipping */ | |
4951 | runrc == 0, /* success/failure indicator */ | |
d20976dc | 4952 | lookup_value, /* value to reset for string2 */ |
059ec3d9 PH |
4953 | &s, /* input pointer */ |
4954 | &yield, /* output pointer */ | |
4955 | &size, /* output size */ | |
4956 | &ptr, /* output current point */ | |
b0e85a8f JH |
4957 | US"run", /* condition type */ |
4958 | &resetok)) | |
059ec3d9 PH |
4959 | { |
4960 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
4961 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
4962 | } | |
4963 | ||
4964 | continue; | |
4965 | } | |
4966 | ||
4967 | /* Handle character translation for "tr" */ | |
4968 | ||
4969 | case EITEM_TR: | |
4970 | { | |
4971 | int oldptr = ptr; | |
4972 | int o2m; | |
4973 | uschar *sub[3]; | |
4974 | ||
b0e85a8f | 4975 | switch(read_subs(sub, 3, 3, &s, skipping, TRUE, US"tr", &resetok)) |
059ec3d9 PH |
4976 | { |
4977 | case 1: goto EXPAND_FAILED_CURLY; | |
4978 | case 2: | |
4979 | case 3: goto EXPAND_FAILED; | |
4980 | } | |
4981 | ||
4982 | yield = string_cat(yield, &size, &ptr, sub[0], Ustrlen(sub[0])); | |
4983 | o2m = Ustrlen(sub[2]) - 1; | |
4984 | ||
4985 | if (o2m >= 0) for (; oldptr < ptr; oldptr++) | |
4986 | { | |
4987 | uschar *m = Ustrrchr(sub[1], yield[oldptr]); | |
4988 | if (m != NULL) | |
4989 | { | |
4990 | int o = m - sub[1]; | |
4991 | yield[oldptr] = sub[2][(o < o2m)? o : o2m]; | |
4992 | } | |
4993 | } | |
4994 | ||
4995 | continue; | |
4996 | } | |
4997 | ||
4998 | /* Handle "hash", "length", "nhash", and "substr" when they are given with | |
4999 | expanded arguments. */ | |
5000 | ||
5001 | case EITEM_HASH: | |
5002 | case EITEM_LENGTH: | |
5003 | case EITEM_NHASH: | |
5004 | case EITEM_SUBSTR: | |
5005 | { | |
5006 | int i; | |
5007 | int len; | |
5008 | uschar *ret; | |
5009 | int val[2] = { 0, -1 }; | |
5010 | uschar *sub[3]; | |
5011 | ||
5012 | /* "length" takes only 2 arguments whereas the others take 2 or 3. | |
2e23003a | 5013 | Ensure that sub[2] is set in the ${length } case. */ |
059ec3d9 PH |
5014 | |
5015 | sub[2] = NULL; | |
5016 | switch(read_subs(sub, (item_type == EITEM_LENGTH)? 2:3, 2, &s, skipping, | |
b0e85a8f | 5017 | TRUE, name, &resetok)) |
059ec3d9 PH |
5018 | { |
5019 | case 1: goto EXPAND_FAILED_CURLY; | |
5020 | case 2: | |
5021 | case 3: goto EXPAND_FAILED; | |
5022 | } | |
5023 | ||
5024 | /* Juggle the arguments if there are only two of them: always move the | |
5025 | string to the last position and make ${length{n}{str}} equivalent to | |
5026 | ${substr{0}{n}{str}}. See the defaults for val[] above. */ | |
5027 | ||
5028 | if (sub[2] == NULL) | |
5029 | { | |
5030 | sub[2] = sub[1]; | |
5031 | sub[1] = NULL; | |
5032 | if (item_type == EITEM_LENGTH) | |
5033 | { | |
5034 | sub[1] = sub[0]; | |
5035 | sub[0] = NULL; | |
5036 | } | |
5037 | } | |
5038 | ||
5039 | for (i = 0; i < 2; i++) | |
5040 | { | |
5041 | if (sub[i] == NULL) continue; | |
5042 | val[i] = (int)Ustrtol(sub[i], &ret, 10); | |
5043 | if (*ret != 0 || (i != 0 && val[i] < 0)) | |
5044 | { | |
5045 | expand_string_message = string_sprintf("\"%s\" is not a%s number " | |
5046 | "(in \"%s\" expansion)", sub[i], (i != 0)? " positive" : "", name); | |
5047 | goto EXPAND_FAILED; | |
5048 | } | |
5049 | } | |
5050 | ||
5051 | ret = | |
5052 | (item_type == EITEM_HASH)? | |
5053 | compute_hash(sub[2], val[0], val[1], &len) : | |
5054 | (item_type == EITEM_NHASH)? | |
5055 | compute_nhash(sub[2], val[0], val[1], &len) : | |
5056 | extract_substr(sub[2], val[0], val[1], &len); | |
5057 | ||
5058 | if (ret == NULL) goto EXPAND_FAILED; | |
5059 | yield = string_cat(yield, &size, &ptr, ret, len); | |
5060 | continue; | |
5061 | } | |
5062 | ||
5063 | /* Handle HMAC computation: ${hmac{<algorithm>}{<secret>}{<text>}} | |
5064 | This code originally contributed by Steve Haslam. It currently supports | |
5065 | the use of MD5 and SHA-1 hashes. | |
5066 | ||
5067 | We need some workspace that is large enough to handle all the supported | |
5068 | hash types. Use macros to set the sizes rather than be too elaborate. */ | |
5069 | ||
5070 | #define MAX_HASHLEN 20 | |
5071 | #define MAX_HASHBLOCKLEN 64 | |
5072 | ||
5073 | case EITEM_HMAC: | |
5074 | { | |
5075 | uschar *sub[3]; | |
5076 | md5 md5_base; | |
5077 | sha1 sha1_base; | |
5078 | void *use_base; | |
5079 | int type, i; | |
5080 | int hashlen; /* Number of octets for the hash algorithm's output */ | |
5081 | int hashblocklen; /* Number of octets the hash algorithm processes */ | |
5082 | uschar *keyptr, *p; | |
5083 | unsigned int keylen; | |
5084 | ||
5085 | uschar keyhash[MAX_HASHLEN]; | |
5086 | uschar innerhash[MAX_HASHLEN]; | |
5087 | uschar finalhash[MAX_HASHLEN]; | |
5088 | uschar finalhash_hex[2*MAX_HASHLEN]; | |
5089 | uschar innerkey[MAX_HASHBLOCKLEN]; | |
5090 | uschar outerkey[MAX_HASHBLOCKLEN]; | |
5091 | ||
b0e85a8f | 5092 | switch (read_subs(sub, 3, 3, &s, skipping, TRUE, name, &resetok)) |
059ec3d9 PH |
5093 | { |
5094 | case 1: goto EXPAND_FAILED_CURLY; | |
5095 | case 2: | |
5096 | case 3: goto EXPAND_FAILED; | |
5097 | } | |
5098 | ||
5099 | if (Ustrcmp(sub[0], "md5") == 0) | |
5100 | { | |
5101 | type = HMAC_MD5; | |
5102 | use_base = &md5_base; | |
5103 | hashlen = 16; | |
5104 | hashblocklen = 64; | |
5105 | } | |
5106 | else if (Ustrcmp(sub[0], "sha1") == 0) | |
5107 | { | |
5108 | type = HMAC_SHA1; | |
5109 | use_base = &sha1_base; | |
5110 | hashlen = 20; | |
5111 | hashblocklen = 64; | |
5112 | } | |
5113 | else | |
5114 | { | |
5115 | expand_string_message = | |
5116 | string_sprintf("hmac algorithm \"%s\" is not recognised", sub[0]); | |
5117 | goto EXPAND_FAILED; | |
5118 | } | |
5119 | ||
5120 | keyptr = sub[1]; | |
5121 | keylen = Ustrlen(keyptr); | |
5122 | ||
5123 | /* If the key is longer than the hash block length, then hash the key | |
5124 | first */ | |
5125 | ||
5126 | if (keylen > hashblocklen) | |
5127 | { | |
5128 | chash_start(type, use_base); | |
5129 | chash_end(type, use_base, keyptr, keylen, keyhash); | |
5130 | keyptr = keyhash; | |
5131 | keylen = hashlen; | |
5132 | } | |
5133 | ||
5134 | /* Now make the inner and outer key values */ | |
5135 | ||
5136 | memset(innerkey, 0x36, hashblocklen); | |
5137 | memset(outerkey, 0x5c, hashblocklen); | |
5138 | ||
5139 | for (i = 0; i < keylen; i++) | |
5140 | { | |
5141 | innerkey[i] ^= keyptr[i]; | |
5142 | outerkey[i] ^= keyptr[i]; | |
5143 | } | |
5144 | ||
5145 | /* Now do the hashes */ | |
5146 | ||
5147 | chash_start(type, use_base); | |
5148 | chash_mid(type, use_base, innerkey); | |
5149 | chash_end(type, use_base, sub[2], Ustrlen(sub[2]), innerhash); | |
5150 | ||
5151 | chash_start(type, use_base); | |
5152 | chash_mid(type, use_base, outerkey); | |
5153 | chash_end(type, use_base, innerhash, hashlen, finalhash); | |
5154 | ||
5155 | /* Encode the final hash as a hex string */ | |
5156 | ||
5157 | p = finalhash_hex; | |
5158 | for (i = 0; i < hashlen; i++) | |
5159 | { | |
5160 | *p++ = hex_digits[(finalhash[i] & 0xf0) >> 4]; | |
5161 | *p++ = hex_digits[finalhash[i] & 0x0f]; | |
5162 | } | |
5163 | ||
5164 | DEBUG(D_any) debug_printf("HMAC[%s](%.*s,%.*s)=%.*s\n", sub[0], | |
5165 | (int)keylen, keyptr, Ustrlen(sub[2]), sub[2], hashlen*2, finalhash_hex); | |
5166 | ||
5167 | yield = string_cat(yield, &size, &ptr, finalhash_hex, hashlen*2); | |
5168 | } | |
5169 | ||
5170 | continue; | |
5171 | ||
5172 | /* Handle global substitution for "sg" - like Perl's s/xxx/yyy/g operator. | |
5173 | We have to save the numerical variables and restore them afterwards. */ | |
5174 | ||
5175 | case EITEM_SG: | |
5176 | { | |
5177 | const pcre *re; | |
5178 | int moffset, moffsetextra, slen; | |
5179 | int roffset; | |
5180 | int emptyopt; | |
5181 | const uschar *rerror; | |
5182 | uschar *subject; | |
5183 | uschar *sub[3]; | |
5184 | int save_expand_nmax = | |
5185 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5186 | ||
b0e85a8f | 5187 | switch(read_subs(sub, 3, 3, &s, skipping, TRUE, US"sg", &resetok)) |
059ec3d9 PH |
5188 | { |
5189 | case 1: goto EXPAND_FAILED_CURLY; | |
5190 | case 2: | |
5191 | case 3: goto EXPAND_FAILED; | |
5192 | } | |
5193 | ||
5194 | /* Compile the regular expression */ | |
5195 | ||
5196 | re = pcre_compile(CS sub[1], PCRE_COPT, (const char **)&rerror, &roffset, | |
5197 | NULL); | |
5198 | ||
5199 | if (re == NULL) | |
5200 | { | |
5201 | expand_string_message = string_sprintf("regular expression error in " | |
5202 | "\"%s\": %s at offset %d", sub[1], rerror, roffset); | |
5203 | goto EXPAND_FAILED; | |
5204 | } | |
5205 | ||
5206 | /* Now run a loop to do the substitutions as often as necessary. It ends | |
5207 | when there are no more matches. Take care over matches of the null string; | |
5208 | do the same thing as Perl does. */ | |
5209 | ||
5210 | subject = sub[0]; | |
5211 | slen = Ustrlen(sub[0]); | |
5212 | moffset = moffsetextra = 0; | |
5213 | emptyopt = 0; | |
5214 | ||
5215 | for (;;) | |
5216 | { | |
5217 | int ovector[3*(EXPAND_MAXN+1)]; | |
5218 | int n = pcre_exec(re, NULL, CS subject, slen, moffset + moffsetextra, | |
0539a19d | 5219 | PCRE_EOPT | emptyopt, ovector, nelem(ovector)); |
059ec3d9 PH |
5220 | int nn; |
5221 | uschar *insert; | |
5222 | ||
5223 | /* No match - if we previously set PCRE_NOTEMPTY after a null match, this | |
5224 | is not necessarily the end. We want to repeat the match from one | |
5225 | character further along, but leaving the basic offset the same (for | |
5226 | copying below). We can't be at the end of the string - that was checked | |
5227 | before setting PCRE_NOTEMPTY. If PCRE_NOTEMPTY is not set, we are | |
5228 | finished; copy the remaining string and end the loop. */ | |
5229 | ||
5230 | if (n < 0) | |
5231 | { | |
5232 | if (emptyopt != 0) | |
5233 | { | |
5234 | moffsetextra = 1; | |
5235 | emptyopt = 0; | |
5236 | continue; | |
5237 | } | |
5238 | yield = string_cat(yield, &size, &ptr, subject+moffset, slen-moffset); | |
5239 | break; | |
5240 | } | |
5241 | ||
5242 | /* Match - set up for expanding the replacement. */ | |
5243 | ||
5244 | if (n == 0) n = EXPAND_MAXN + 1; | |
5245 | expand_nmax = 0; | |
5246 | for (nn = 0; nn < n*2; nn += 2) | |
5247 | { | |
5248 | expand_nstring[expand_nmax] = subject + ovector[nn]; | |
5249 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; | |
5250 | } | |
5251 | expand_nmax--; | |
5252 | ||
5253 | /* Copy the characters before the match, plus the expanded insertion. */ | |
5254 | ||
5255 | yield = string_cat(yield, &size, &ptr, subject + moffset, | |
5256 | ovector[0] - moffset); | |
5257 | insert = expand_string(sub[2]); | |
5258 | if (insert == NULL) goto EXPAND_FAILED; | |
5259 | yield = string_cat(yield, &size, &ptr, insert, Ustrlen(insert)); | |
5260 | ||
5261 | moffset = ovector[1]; | |
5262 | moffsetextra = 0; | |
5263 | emptyopt = 0; | |
5264 | ||
5265 | /* If we have matched an empty string, first check to see if we are at | |
5266 | the end of the subject. If so, the loop is over. Otherwise, mimic | |
5267 | what Perl's /g options does. This turns out to be rather cunning. First | |
5268 | we set PCRE_NOTEMPTY and PCRE_ANCHORED and try the match a non-empty | |
5269 | string at the same point. If this fails (picked up above) we advance to | |
5270 | the next character. */ | |
5271 | ||
5272 | if (ovector[0] == ovector[1]) | |
5273 | { | |
5274 | if (ovector[0] == slen) break; | |
5275 | emptyopt = PCRE_NOTEMPTY | PCRE_ANCHORED; | |
5276 | } | |
5277 | } | |
5278 | ||
5279 | /* All done - restore numerical variables. */ | |
5280 | ||
5281 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5282 | save_expand_nlength); | |
5283 | continue; | |
5284 | } | |
5285 | ||
5286 | /* Handle keyed and numbered substring extraction. If the first argument | |
5287 | consists entirely of digits, then a numerical extraction is assumed. */ | |
5288 | ||
5289 | case EITEM_EXTRACT: | |
5290 | { | |
5291 | int i; | |
5292 | int j = 2; | |
5293 | int field_number = 1; | |
5294 | BOOL field_number_set = FALSE; | |
5295 | uschar *save_lookup_value = lookup_value; | |
5296 | uschar *sub[3]; | |
5297 | int save_expand_nmax = | |
5298 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5299 | ||
5300 | /* Read the arguments */ | |
5301 | ||
5302 | for (i = 0; i < j; i++) | |
5303 | { | |
5304 | while (isspace(*s)) s++; | |
aa26e137 | 5305 | if (*s == '{') /*}*/ |
059ec3d9 | 5306 | { |
b0e85a8f JH |
5307 | sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
5308 | if (sub[i] == NULL) goto EXPAND_FAILED; /*{*/ | |
059ec3d9 PH |
5309 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; |
5310 | ||
5311 | /* After removal of leading and trailing white space, the first | |
5312 | argument must not be empty; if it consists entirely of digits | |
5313 | (optionally preceded by a minus sign), this is a numerical | |
5314 | extraction, and we expect 3 arguments. */ | |
5315 | ||
5316 | if (i == 0) | |
5317 | { | |
5318 | int len; | |
5319 | int x = 0; | |
5320 | uschar *p = sub[0]; | |
5321 | ||
5322 | while (isspace(*p)) p++; | |
5323 | sub[0] = p; | |
5324 | ||
5325 | len = Ustrlen(p); | |
5326 | while (len > 0 && isspace(p[len-1])) len--; | |
5327 | p[len] = 0; | |
5328 | ||
82dbd376 JH |
5329 | if (!skipping) |
5330 | { | |
5331 | if (*p == 0) | |
5332 | { | |
5333 | expand_string_message = US"first argument of \"extract\" must " | |
5334 | "not be empty"; | |
5335 | goto EXPAND_FAILED; | |
5336 | } | |
5337 | ||
5338 | if (*p == '-') | |
5339 | { | |
5340 | field_number = -1; | |
5341 | p++; | |
5342 | } | |
5343 | while (*p != 0 && isdigit(*p)) x = x * 10 + *p++ - '0'; | |
5344 | if (*p == 0) | |
5345 | { | |
5346 | field_number *= x; | |
5347 | j = 3; /* Need 3 args */ | |
5348 | field_number_set = TRUE; | |
5349 | } | |
5350 | } | |
059ec3d9 PH |
5351 | } |
5352 | } | |
5353 | else goto EXPAND_FAILED_CURLY; | |
5354 | } | |
5355 | ||
5356 | /* Extract either the numbered or the keyed substring into $value. If | |
5357 | skipping, just pretend the extraction failed. */ | |
5358 | ||
5359 | lookup_value = skipping? NULL : field_number_set? | |
5360 | expand_gettokened(field_number, sub[1], sub[2]) : | |
5361 | expand_getkeyed(sub[0], sub[1]); | |
5362 | ||
5363 | /* If no string follows, $value gets substituted; otherwise there can | |
5364 | be yes/no strings, as for lookup or if. */ | |
5365 | ||
aa26e137 JH |
5366 | switch(process_yesno( |
5367 | skipping, /* were previously skipping */ | |
5368 | lookup_value != NULL, /* success/failure indicator */ | |
5369 | save_lookup_value, /* value to reset for string2 */ | |
5370 | &s, /* input pointer */ | |
5371 | &yield, /* output pointer */ | |
5372 | &size, /* output size */ | |
5373 | &ptr, /* output current point */ | |
5374 | US"extract", /* condition type */ | |
5375 | &resetok)) | |
5376 | { | |
5377 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5378 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5379 | } | |
5380 | ||
5381 | /* All done - restore numerical variables. */ | |
5382 | ||
5383 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5384 | save_expand_nlength); | |
5385 | ||
5386 | continue; | |
5387 | } | |
5388 | ||
5389 | /* return the Nth item from a list */ | |
5390 | ||
5391 | case EITEM_LISTEXTRACT: | |
5392 | { | |
5393 | int i; | |
5394 | int field_number = 1; | |
5395 | uschar *save_lookup_value = lookup_value; | |
5396 | uschar *sub[2]; | |
5397 | int save_expand_nmax = | |
5398 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5399 | ||
5400 | /* Read the field & list arguments */ | |
5401 | ||
5402 | for (i = 0; i < 2; i++) | |
5403 | { | |
5404 | while (isspace(*s)) s++; | |
5405 | if (*s != '{') /*}*/ | |
5406 | goto EXPAND_FAILED_CURLY; | |
5407 | ||
5408 | sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
5409 | if (!sub[i]) goto EXPAND_FAILED; /*{*/ | |
5410 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5411 | ||
5412 | /* After removal of leading and trailing white space, the first | |
5413 | argument must be numeric and nonempty. */ | |
5414 | ||
5415 | if (i == 0) | |
5416 | { | |
5417 | int len; | |
5418 | int x = 0; | |
5419 | uschar *p = sub[0]; | |
5420 | ||
5421 | while (isspace(*p)) p++; | |
5422 | sub[0] = p; | |
5423 | ||
5424 | len = Ustrlen(p); | |
5425 | while (len > 0 && isspace(p[len-1])) len--; | |
5426 | p[len] = 0; | |
5427 | ||
5428 | if (!*p && !skipping) | |
5429 | { | |
5430 | expand_string_message = US"first argument of \"listextract\" must " | |
5431 | "not be empty"; | |
5432 | goto EXPAND_FAILED; | |
5433 | } | |
5434 | ||
5435 | if (*p == '-') | |
5436 | { | |
5437 | field_number = -1; | |
5438 | p++; | |
5439 | } | |
5440 | while (*p && isdigit(*p)) x = x * 10 + *p++ - '0'; | |
5441 | if (*p) | |
5442 | { | |
5443 | expand_string_message = US"first argument of \"listextract\" must " | |
5444 | "be numeric"; | |
5445 | goto EXPAND_FAILED; | |
5446 | } | |
5447 | field_number *= x; | |
5448 | } | |
5449 | } | |
5450 | ||
5451 | /* Extract the numbered element into $value. If | |
5452 | skipping, just pretend the extraction failed. */ | |
5453 | ||
5454 | lookup_value = skipping? NULL : expand_getlistele(field_number, sub[1]); | |
5455 | ||
5456 | /* If no string follows, $value gets substituted; otherwise there can | |
5457 | be yes/no strings, as for lookup or if. */ | |
5458 | ||
059ec3d9 PH |
5459 | switch(process_yesno( |
5460 | skipping, /* were previously skipping */ | |
5461 | lookup_value != NULL, /* success/failure indicator */ | |
5462 | save_lookup_value, /* value to reset for string2 */ | |
5463 | &s, /* input pointer */ | |
5464 | &yield, /* output pointer */ | |
5465 | &size, /* output size */ | |
5466 | &ptr, /* output current point */ | |
b0e85a8f JH |
5467 | US"extract", /* condition type */ |
5468 | &resetok)) | |
059ec3d9 PH |
5469 | { |
5470 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5471 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5472 | } | |
5473 | ||
5474 | /* All done - restore numerical variables. */ | |
5475 | ||
5476 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5477 | save_expand_nlength); | |
5478 | ||
5479 | continue; | |
5480 | } | |
1a46a8c5 | 5481 | |
9d1c15ef JH |
5482 | #ifdef SUPPORT_TLS |
5483 | case EITEM_CERTEXTRACT: | |
5484 | { | |
9d1c15ef JH |
5485 | uschar *save_lookup_value = lookup_value; |
5486 | uschar *sub[2]; | |
5487 | int save_expand_nmax = | |
5488 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5489 | ||
5490 | /* Read the field argument */ | |
5491 | while (isspace(*s)) s++; | |
5492 | if (*s != '{') /*}*/ | |
5493 | goto EXPAND_FAILED_CURLY; | |
5494 | sub[0] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
5495 | if (!sub[0]) goto EXPAND_FAILED; /*{*/ | |
5496 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5497 | /* strip spaces fore & aft */ | |
5498 | { | |
5499 | int len; | |
9d1c15ef JH |
5500 | uschar *p = sub[0]; |
5501 | ||
5502 | while (isspace(*p)) p++; | |
5503 | sub[0] = p; | |
5504 | ||
5505 | len = Ustrlen(p); | |
5506 | while (len > 0 && isspace(p[len-1])) len--; | |
5507 | p[len] = 0; | |
5508 | } | |
5509 | ||
5510 | /* inspect the cert argument */ | |
5511 | while (isspace(*s)) s++; | |
5512 | if (*s != '{') /*}*/ | |
5513 | goto EXPAND_FAILED_CURLY; | |
5514 | if (*++s != '$') | |
5515 | { | |
5516 | expand_string_message = US"second argument of \"certextract\" must " | |
5517 | "be a certificate variable"; | |
5518 | goto EXPAND_FAILED; | |
5519 | } | |
5520 | sub[1] = expand_string_internal(s+1, TRUE, &s, skipping, FALSE, &resetok); | |
5521 | if (!sub[1]) goto EXPAND_FAILED; /*{*/ | |
5522 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5523 | ||
5524 | if (skipping) | |
5525 | lookup_value = NULL; | |
5526 | else | |
5527 | { | |
5528 | lookup_value = expand_getcertele(sub[0], sub[1]); | |
5529 | if (*expand_string_message) goto EXPAND_FAILED; | |
5530 | } | |
5531 | switch(process_yesno( | |
5532 | skipping, /* were previously skipping */ | |
5533 | lookup_value != NULL, /* success/failure indicator */ | |
5534 | save_lookup_value, /* value to reset for string2 */ | |
5535 | &s, /* input pointer */ | |
5536 | &yield, /* output pointer */ | |
5537 | &size, /* output size */ | |
5538 | &ptr, /* output current point */ | |
5539 | US"extract", /* condition type */ | |
5540 | &resetok)) | |
5541 | { | |
5542 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5543 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5544 | } | |
5545 | ||
5546 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5547 | save_expand_nlength); | |
5548 | continue; | |
5549 | } | |
5550 | #endif /*SUPPORT_TLS*/ | |
5551 | ||
29f89cad PH |
5552 | /* Handle list operations */ |
5553 | ||
5554 | case EITEM_FILTER: | |
5555 | case EITEM_MAP: | |
5556 | case EITEM_REDUCE: | |
5557 | { | |
5558 | int sep = 0; | |
5559 | int save_ptr = ptr; | |
5560 | uschar outsep[2] = { '\0', '\0' }; | |
55414b25 | 5561 | const uschar *list, *expr, *temp; |
29f89cad PH |
5562 | uschar *save_iterate_item = iterate_item; |
5563 | uschar *save_lookup_value = lookup_value; | |
5564 | ||
5565 | while (isspace(*s)) s++; | |
5566 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
5567 | ||
b0e85a8f | 5568 | list = expand_string_internal(s, TRUE, &s, skipping, TRUE, &resetok); |
29f89cad PH |
5569 | if (list == NULL) goto EXPAND_FAILED; |
5570 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5571 | ||
5572 | if (item_type == EITEM_REDUCE) | |
5573 | { | |
55414b25 | 5574 | uschar * t; |
29f89cad PH |
5575 | while (isspace(*s)) s++; |
5576 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
55414b25 | 5577 | t = expand_string_internal(s, TRUE, &s, skipping, TRUE, &resetok); |
e1af7642 | 5578 | if (!t) goto EXPAND_FAILED; |
55414b25 | 5579 | lookup_value = t; |
29f89cad PH |
5580 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; |
5581 | } | |
5582 | ||
5583 | while (isspace(*s)) s++; | |
5584 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
5585 | ||
5586 | expr = s; | |
5587 | ||
5588 | /* For EITEM_FILTER, call eval_condition once, with result discarded (as | |
5589 | if scanning a "false" part). This allows us to find the end of the | |
5590 | condition, because if the list is empty, we won't actually evaluate the | |
5591 | condition for real. For EITEM_MAP and EITEM_REDUCE, do the same, using | |
5592 | the normal internal expansion function. */ | |
5593 | ||
5594 | if (item_type == EITEM_FILTER) | |
5595 | { | |
b0e85a8f | 5596 | temp = eval_condition(expr, &resetok, NULL); |
29f89cad PH |
5597 | if (temp != NULL) s = temp; |
5598 | } | |
5599 | else | |
b0e85a8f | 5600 | temp = expand_string_internal(s, TRUE, &s, TRUE, TRUE, &resetok); |
29f89cad PH |
5601 | |
5602 | if (temp == NULL) | |
5603 | { | |
5604 | expand_string_message = string_sprintf("%s inside \"%s\" item", | |
5605 | expand_string_message, name); | |
5606 | goto EXPAND_FAILED; | |
5607 | } | |
5608 | ||
5609 | while (isspace(*s)) s++; | |
5610 | if (*s++ != '}') | |
2e23003a | 5611 | { /*{*/ |
29f89cad PH |
5612 | expand_string_message = string_sprintf("missing } at end of condition " |
5613 | "or expression inside \"%s\"", name); | |
5614 | goto EXPAND_FAILED; | |
5615 | } | |
5616 | ||
2e23003a | 5617 | while (isspace(*s)) s++; /*{*/ |
29f89cad | 5618 | if (*s++ != '}') |
2e23003a | 5619 | { /*{*/ |
29f89cad PH |
5620 | expand_string_message = string_sprintf("missing } at end of \"%s\"", |
5621 | name); | |
5622 | goto EXPAND_FAILED; | |
5623 | } | |
5624 | ||
5625 | /* If we are skipping, we can now just move on to the next item. When | |
5626 | processing for real, we perform the iteration. */ | |
5627 | ||
5628 | if (skipping) continue; | |
5629 | while ((iterate_item = string_nextinlist(&list, &sep, NULL, 0)) != NULL) | |
5630 | { | |
5631 | *outsep = (uschar)sep; /* Separator as a string */ | |
5632 | ||
5633 | DEBUG(D_expand) debug_printf("%s: $item = \"%s\"\n", name, iterate_item); | |
5634 | ||
5635 | if (item_type == EITEM_FILTER) | |
5636 | { | |
5637 | BOOL condresult; | |
b0e85a8f | 5638 | if (eval_condition(expr, &resetok, &condresult) == NULL) |
29f89cad | 5639 | { |
e58c13cc PH |
5640 | iterate_item = save_iterate_item; |
5641 | lookup_value = save_lookup_value; | |
29f89cad PH |
5642 | expand_string_message = string_sprintf("%s inside \"%s\" condition", |
5643 | expand_string_message, name); | |
5644 | goto EXPAND_FAILED; | |
5645 | } | |
5646 | DEBUG(D_expand) debug_printf("%s: condition is %s\n", name, | |
5647 | condresult? "true":"false"); | |
5648 | if (condresult) | |
5649 | temp = iterate_item; /* TRUE => include this item */ | |
5650 | else | |
5651 | continue; /* FALSE => skip this item */ | |
5652 | } | |
5653 | ||
5654 | /* EITEM_MAP and EITEM_REDUCE */ | |
5655 | ||
5656 | else | |
5657 | { | |
55414b25 JH |
5658 | uschar * t = expand_string_internal(expr, TRUE, NULL, skipping, TRUE, &resetok); |
5659 | temp = t; | |
29f89cad PH |
5660 | if (temp == NULL) |
5661 | { | |
e58c13cc | 5662 | iterate_item = save_iterate_item; |
29f89cad PH |
5663 | expand_string_message = string_sprintf("%s inside \"%s\" item", |
5664 | expand_string_message, name); | |
5665 | goto EXPAND_FAILED; | |
5666 | } | |
5667 | if (item_type == EITEM_REDUCE) | |
5668 | { | |
55414b25 | 5669 | lookup_value = t; /* Update the value of $value */ |
29f89cad PH |
5670 | continue; /* and continue the iteration */ |
5671 | } | |
5672 | } | |
5673 | ||
5674 | /* We reach here for FILTER if the condition is true, always for MAP, | |
5675 | and never for REDUCE. The value in "temp" is to be added to the output | |
5676 | list that is being created, ensuring that any occurrences of the | |
5677 | separator character are doubled. Unless we are dealing with the first | |
5678 | item of the output list, add in a space if the new item begins with the | |
5679 | separator character, or is an empty string. */ | |
5680 | ||
5681 | if (ptr != save_ptr && (temp[0] == *outsep || temp[0] == 0)) | |
5682 | yield = string_cat(yield, &size, &ptr, US" ", 1); | |
5683 | ||
5684 | /* Add the string in "temp" to the output list that we are building, | |
5685 | This is done in chunks by searching for the separator character. */ | |
5686 | ||
5687 | for (;;) | |
5688 | { | |
5689 | size_t seglen = Ustrcspn(temp, outsep); | |
5690 | yield = string_cat(yield, &size, &ptr, temp, seglen + 1); | |
5691 | ||
5692 | /* If we got to the end of the string we output one character | |
5693 | too many; backup and end the loop. Otherwise arrange to double the | |
5694 | separator. */ | |
5695 | ||
5696 | if (temp[seglen] == '\0') { ptr--; break; } | |
5697 | yield = string_cat(yield, &size, &ptr, outsep, 1); | |
5698 | temp += seglen + 1; | |
5699 | } | |
5700 | ||
5701 | /* Output a separator after the string: we will remove the redundant | |
5702 | final one at the end. */ | |
5703 | ||
5704 | yield = string_cat(yield, &size, &ptr, outsep, 1); | |
5705 | } /* End of iteration over the list loop */ | |
5706 | ||
5707 | /* REDUCE has generated no output above: output the final value of | |
5708 | $value. */ | |
5709 | ||
5710 | if (item_type == EITEM_REDUCE) | |
5711 | { | |
5712 | yield = string_cat(yield, &size, &ptr, lookup_value, | |
5713 | Ustrlen(lookup_value)); | |
5714 | lookup_value = save_lookup_value; /* Restore $value */ | |
5715 | } | |
5716 | ||
5717 | /* FILTER and MAP generate lists: if they have generated anything, remove | |
5718 | the redundant final separator. Even though an empty item at the end of a | |
5719 | list does not count, this is tidier. */ | |
5720 | ||
5721 | else if (ptr != save_ptr) ptr--; | |
5722 | ||
5723 | /* Restore preserved $item */ | |
5724 | ||
5725 | iterate_item = save_iterate_item; | |
5726 | continue; | |
5727 | } | |
5728 | ||
ac4ef9bd JH |
5729 | case EITEM_SORT: |
5730 | { | |
5731 | int sep = 0; | |
55414b25 | 5732 | const uschar *srclist, *cmp, *xtract; |
ac4ef9bd | 5733 | uschar *srcitem; |
55414b25 | 5734 | const uschar *dstlist = NULL, *dstkeylist = NULL; |
ac4ef9bd JH |
5735 | uschar * tmp; |
5736 | uschar *save_iterate_item = iterate_item; | |
5737 | ||
5738 | while (isspace(*s)) s++; | |
5739 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
5740 | ||
5741 | srclist = expand_string_internal(s, TRUE, &s, skipping, TRUE, &resetok); | |
5742 | if (!srclist) goto EXPAND_FAILED; | |
5743 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5744 | ||
5745 | while (isspace(*s)) s++; | |
5746 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
5747 | ||
5748 | cmp = expand_string_internal(s, TRUE, &s, skipping, FALSE, &resetok); | |
5749 | if (!cmp) goto EXPAND_FAILED; | |
5750 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5751 | ||
5752 | while (isspace(*s)) s++; | |
5753 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
5754 | ||
5755 | xtract = s; | |
5756 | tmp = expand_string_internal(s, TRUE, &s, TRUE, TRUE, &resetok); | |
5757 | if (!tmp) goto EXPAND_FAILED; | |
5758 | xtract = string_copyn(xtract, s - xtract); | |
5759 | ||
5760 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5761 | /*{*/ | |
5762 | if (*s++ != '}') | |
5763 | { /*{*/ | |
5764 | expand_string_message = US"missing } at end of \"sort\""; | |
5765 | goto EXPAND_FAILED; | |
5766 | } | |
5767 | ||
5768 | if (skipping) continue; | |
5769 | ||
5770 | while ((srcitem = string_nextinlist(&srclist, &sep, NULL, 0))) | |
5771 | { | |
5772 | uschar * dstitem; | |
5773 | uschar * newlist = NULL; | |
5774 | uschar * newkeylist = NULL; | |
5775 | uschar * srcfield; | |
5776 | ||
5777 | DEBUG(D_expand) debug_printf("%s: $item = \"%s\"\n", name, srcitem); | |
5778 | ||
5779 | /* extract field for comparisons */ | |
5780 | iterate_item = srcitem; | |
5781 | if ( !(srcfield = expand_string_internal(xtract, FALSE, NULL, FALSE, | |
5782 | TRUE, &resetok)) | |
5783 | || !*srcfield) | |
5784 | { | |
5785 | expand_string_message = string_sprintf( | |
5786 | "field-extract in sort: \"%s\"", xtract); | |
5787 | goto EXPAND_FAILED; | |
5788 | } | |
5789 | ||
5790 | /* Insertion sort */ | |
5791 | ||
5792 | /* copy output list until new-item < list-item */ | |
5793 | while ((dstitem = string_nextinlist(&dstlist, &sep, NULL, 0))) | |
5794 | { | |
5795 | uschar * dstfield; | |
5796 | uschar * expr; | |
5797 | BOOL before; | |
5798 | ||
5799 | /* field for comparison */ | |
5800 | if (!(dstfield = string_nextinlist(&dstkeylist, &sep, NULL, 0))) | |
5801 | goto sort_mismatch; | |
5802 | ||
5803 | /* build and run condition string */ | |
5804 | expr = string_sprintf("%s{%s}{%s}", cmp, srcfield, dstfield); | |
5805 | ||
5806 | DEBUG(D_expand) debug_printf("%s: cond = \"%s\"\n", name, expr); | |
5807 | if (!eval_condition(expr, &resetok, &before)) | |
5808 | { | |
5809 | expand_string_message = string_sprintf("comparison in sort: %s", | |
5810 | expr); | |
5811 | goto EXPAND_FAILED; | |
5812 | } | |
5813 | ||
5814 | if (before) | |
5815 | { | |
5816 | /* New-item sorts before this dst-item. Append new-item, | |
5817 | then dst-item, then remainder of dst list. */ | |
5818 | ||
5819 | newlist = string_append_listele(newlist, sep, srcitem); | |
5820 | newkeylist = string_append_listele(newkeylist, sep, srcfield); | |
5821 | srcitem = NULL; | |
5822 | ||
5823 | newlist = string_append_listele(newlist, sep, dstitem); | |
5824 | newkeylist = string_append_listele(newkeylist, sep, dstfield); | |
5825 | ||
5826 | while ((dstitem = string_nextinlist(&dstlist, &sep, NULL, 0))) | |
5827 | { | |
5828 | if (!(dstfield = string_nextinlist(&dstkeylist, &sep, NULL, 0))) | |
5829 | goto sort_mismatch; | |
5830 | newlist = string_append_listele(newlist, sep, dstitem); | |
5831 | newkeylist = string_append_listele(newkeylist, sep, dstfield); | |
5832 | } | |
5833 | ||
5834 | break; | |
5835 | } | |
5836 | ||
5837 | newlist = string_append_listele(newlist, sep, dstitem); | |
5838 | newkeylist = string_append_listele(newkeylist, sep, dstfield); | |
5839 | } | |
5840 | ||
5841 | /* If we ran out of dstlist without consuming srcitem, append it */ | |
5842 | if (srcitem) | |
5843 | { | |
5844 | newlist = string_append_listele(newlist, sep, srcitem); | |
5845 | newkeylist = string_append_listele(newkeylist, sep, srcfield); | |
5846 | } | |
5847 | ||
5848 | dstlist = newlist; | |
5849 | dstkeylist = newkeylist; | |
5850 | ||
5851 | DEBUG(D_expand) debug_printf("%s: dstlist = \"%s\"\n", name, dstlist); | |
5852 | DEBUG(D_expand) debug_printf("%s: dstkeylist = \"%s\"\n", name, dstkeylist); | |
5853 | } | |
5854 | ||
5855 | if (dstlist) | |
5856 | yield = string_cat(yield, &size, &ptr, dstlist, Ustrlen(dstlist)); | |
5857 | ||
5858 | /* Restore preserved $item */ | |
5859 | iterate_item = save_iterate_item; | |
5860 | continue; | |
5861 | ||
5862 | sort_mismatch: | |
5863 | expand_string_message = US"Internal error in sort (list mismatch)"; | |
5864 | goto EXPAND_FAILED; | |
5865 | } | |
5866 | ||
29f89cad | 5867 | |
2e23003a | 5868 | /* If ${dlfunc } support is configured, handle calling dynamically-loaded |
1a46a8c5 PH |
5869 | functions, unless locked out at this time. Syntax is ${dlfunc{file}{func}} |
5870 | or ${dlfunc{file}{func}{arg}} or ${dlfunc{file}{func}{arg1}{arg2}} or up to | |
5871 | a maximum of EXPAND_DLFUNC_MAX_ARGS arguments (defined below). */ | |
5872 | ||
5873 | #define EXPAND_DLFUNC_MAX_ARGS 8 | |
5874 | ||
5875 | case EITEM_DLFUNC: | |
089fc87a JH |
5876 | #ifndef EXPAND_DLFUNC |
5877 | expand_string_message = US"\"${dlfunc\" encountered, but this facility " /*}*/ | |
5878 | "is not included in this binary"; | |
5879 | goto EXPAND_FAILED; | |
1a46a8c5 | 5880 | |
089fc87a | 5881 | #else /* EXPAND_DLFUNC */ |
1a46a8c5 PH |
5882 | { |
5883 | tree_node *t; | |
5884 | exim_dlfunc_t *func; | |
5885 | uschar *result; | |
5886 | int status, argc; | |
5887 | uschar *argv[EXPAND_DLFUNC_MAX_ARGS + 3]; | |
5888 | ||
5889 | if ((expand_forbid & RDO_DLFUNC) != 0) | |
5890 | { | |
5891 | expand_string_message = | |
5892 | US"dynamically-loaded functions are not permitted"; | |
5893 | goto EXPAND_FAILED; | |
5894 | } | |
5895 | ||
5896 | switch(read_subs(argv, EXPAND_DLFUNC_MAX_ARGS + 2, 2, &s, skipping, | |
b0e85a8f | 5897 | TRUE, US"dlfunc", &resetok)) |
1a46a8c5 PH |
5898 | { |
5899 | case 1: goto EXPAND_FAILED_CURLY; | |
5900 | case 2: | |
5901 | case 3: goto EXPAND_FAILED; | |
5902 | } | |
5903 | ||
5904 | /* If skipping, we don't actually do anything */ | |
5905 | ||
5906 | if (skipping) continue; | |
5907 | ||
5908 | /* Look up the dynamically loaded object handle in the tree. If it isn't | |
5909 | found, dlopen() the file and put the handle in the tree for next time. */ | |
5910 | ||
5911 | t = tree_search(dlobj_anchor, argv[0]); | |
5912 | if (t == NULL) | |
5913 | { | |
5914 | void *handle = dlopen(CS argv[0], RTLD_LAZY); | |
5915 | if (handle == NULL) | |
5916 | { | |
5917 | expand_string_message = string_sprintf("dlopen \"%s\" failed: %s", | |
5918 | argv[0], dlerror()); | |
5919 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", expand_string_message); | |
5920 | goto EXPAND_FAILED; | |
5921 | } | |
5922 | t = store_get_perm(sizeof(tree_node) + Ustrlen(argv[0])); | |
5923 | Ustrcpy(t->name, argv[0]); | |
5924 | t->data.ptr = handle; | |
5925 | (void)tree_insertnode(&dlobj_anchor, t); | |
5926 | } | |
5927 | ||
5928 | /* Having obtained the dynamically loaded object handle, look up the | |
5929 | function pointer. */ | |
5930 | ||
5931 | func = (exim_dlfunc_t *)dlsym(t->data.ptr, CS argv[1]); | |
5932 | if (func == NULL) | |
5933 | { | |
5934 | expand_string_message = string_sprintf("dlsym \"%s\" in \"%s\" failed: " | |
5935 | "%s", argv[1], argv[0], dlerror()); | |
7dbf77c9 | 5936 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", expand_string_message); |
1a46a8c5 PH |
5937 | goto EXPAND_FAILED; |
5938 | } | |
5939 | ||
5940 | /* Call the function and work out what to do with the result. If it | |
5941 | returns OK, we have a replacement string; if it returns DEFER then | |
5942 | expansion has failed in a non-forced manner; if it returns FAIL then | |
5943 | failure was forced; if it returns ERROR or any other value there's a | |
d6b4d938 TF |
5944 | problem, so panic slightly. In any case, assume that the function has |
5945 | side-effects on the store that must be preserved. */ | |
1a46a8c5 | 5946 | |
d6b4d938 | 5947 | resetok = FALSE; |
1a46a8c5 PH |
5948 | result = NULL; |
5949 | for (argc = 0; argv[argc] != NULL; argc++); | |
5950 | status = func(&result, argc - 2, &argv[2]); | |
5951 | if(status == OK) | |
5952 | { | |
5953 | if (result == NULL) result = US""; | |
5954 | yield = string_cat(yield, &size, &ptr, result, Ustrlen(result)); | |
5955 | continue; | |
5956 | } | |
5957 | else | |
5958 | { | |
5959 | expand_string_message = result == NULL ? US"(no message)" : result; | |
5960 | if(status == FAIL_FORCED) expand_string_forcedfail = TRUE; | |
5961 | else if(status != FAIL) | |
5962 | log_write(0, LOG_MAIN|LOG_PANIC, "dlfunc{%s}{%s} failed (%d): %s", | |
5963 | argv[0], argv[1], status, expand_string_message); | |
5964 | goto EXPAND_FAILED; | |
5965 | } | |
5966 | } | |
089fc87a JH |
5967 | #endif /* EXPAND_DLFUNC */ |
5968 | ||
5969 | case EITEM_ENV: /* ${env {name} {val_if_found} {val_if_unfound}} */ | |
5970 | { | |
5971 | uschar * key; | |
5972 | uschar *save_lookup_value = lookup_value; | |
5973 | ||
5974 | while (isspace(*s)) s++; | |
5975 | if (*s != '{') /*}*/ | |
5976 | goto EXPAND_FAILED; | |
5977 | ||
5978 | key = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
5979 | if (!key) goto EXPAND_FAILED; /*{*/ | |
5980 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5981 | ||
5982 | lookup_value = US getenv(CS key); | |
5983 | ||
5984 | switch(process_yesno( | |
5985 | skipping, /* were previously skipping */ | |
5986 | lookup_value != NULL, /* success/failure indicator */ | |
5987 | save_lookup_value, /* value to reset for string2 */ | |
5988 | &s, /* input pointer */ | |
5989 | &yield, /* output pointer */ | |
5990 | &size, /* output size */ | |
5991 | &ptr, /* output current point */ | |
5992 | US"env", /* condition type */ | |
5993 | &resetok)) | |
5994 | { | |
5995 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5996 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5997 | } | |
5998 | continue; | |
5999 | } | |
2e23003a | 6000 | } /* EITEM_* switch */ |
059ec3d9 PH |
6001 | |
6002 | /* Control reaches here if the name is not recognized as one of the more | |
6003 | complicated expansion items. Check for the "operator" syntax (name terminated | |
6004 | by a colon). Some of the operators have arguments, separated by _ from the | |
6005 | name. */ | |
6006 | ||
6007 | if (*s == ':') | |
6008 | { | |
6009 | int c; | |
6010 | uschar *arg = NULL; | |
6a8a60e0 | 6011 | uschar *sub; |
e3dd1d67 | 6012 | var_entry *vp = NULL; |
059ec3d9 PH |
6013 | |
6014 | /* Owing to an historical mis-design, an underscore may be part of the | |
6015 | operator name, or it may introduce arguments. We therefore first scan the | |
6016 | table of names that contain underscores. If there is no match, we cut off | |
6017 | the arguments and then scan the main table. */ | |
6018 | ||
6a8a60e0 | 6019 | if ((c = chop_match(name, op_table_underscore, |
0539a19d | 6020 | nelem(op_table_underscore))) < 0) |
059ec3d9 PH |
6021 | { |
6022 | arg = Ustrchr(name, '_'); | |
6023 | if (arg != NULL) *arg = 0; | |
0539a19d JH |
6024 | c = chop_match(name, op_table_main, nelem(op_table_main)); |
6025 | if (c >= 0) c += nelem(op_table_underscore); | |
059ec3d9 PH |
6026 | if (arg != NULL) *arg++ = '_'; /* Put back for error messages */ |
6027 | } | |
6028 | ||
6a8a60e0 JH |
6029 | /* Deal specially with operators that might take a certificate variable |
6030 | as we do not want to do the usual expansion. For most, expand the string.*/ | |
6031 | switch(c) | |
6032 | { | |
80c974f8 | 6033 | #ifdef SUPPORT_TLS |
6a8a60e0 | 6034 | case EOP_MD5: |
9ef9101c JH |
6035 | case EOP_SHA1: |
6036 | case EOP_SHA256: | |
6a8a60e0 JH |
6037 | if (s[1] == '$') |
6038 | { | |
55414b25 | 6039 | const uschar * s1 = s; |
6a8a60e0 JH |
6040 | sub = expand_string_internal(s+2, TRUE, &s1, skipping, |
6041 | FALSE, &resetok); | |
6042 | if (!sub) goto EXPAND_FAILED; /*{*/ | |
6043 | if (*s1 != '}') goto EXPAND_FAILED_CURLY; | |
6044 | if ((vp = find_var_ent(sub)) && vp->type == vtype_cert) | |
6045 | { | |
6046 | s = s1+1; | |
6047 | break; | |
6048 | } | |
fabe4dd9 | 6049 | vp = NULL; |
6a8a60e0 | 6050 | } |
6a8a60e0 | 6051 | /*FALLTHROUGH*/ |
80c974f8 | 6052 | #endif |
6a8a60e0 JH |
6053 | default: |
6054 | sub = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
6055 | if (!sub) goto EXPAND_FAILED; | |
6056 | s++; | |
6057 | break; | |
6058 | } | |
6059 | ||
059ec3d9 PH |
6060 | /* If we are skipping, we don't need to perform the operation at all. |
6061 | This matters for operations like "mask", because the data may not be | |
6062 | in the correct format when skipping. For example, the expression may test | |
6063 | for the existence of $sender_host_address before trying to mask it. For | |
6064 | other operations, doing them may not fail, but it is a waste of time. */ | |
6065 | ||
6066 | if (skipping && c >= 0) continue; | |
6067 | ||
6068 | /* Otherwise, switch on the operator type */ | |
6069 | ||
6070 | switch(c) | |
6071 | { | |
6072 | case EOP_BASE62: | |
6073 | { | |
6074 | uschar *t; | |
6075 | unsigned long int n = Ustrtoul(sub, &t, 10); | |
6076 | if (*t != 0) | |
6077 | { | |
6078 | expand_string_message = string_sprintf("argument for base62 " | |
6079 | "operator is \"%s\", which is not a decimal number", sub); | |
6080 | goto EXPAND_FAILED; | |
6081 | } | |
6082 | t = string_base62(n); | |
6083 | yield = string_cat(yield, &size, &ptr, t, Ustrlen(t)); | |
6084 | continue; | |
6085 | } | |
6086 | ||
9a799bc0 PH |
6087 | /* Note that for Darwin and Cygwin, BASE_62 actually has the value 36 */ |
6088 | ||
059ec3d9 PH |
6089 | case EOP_BASE62D: |
6090 | { | |
6091 | uschar buf[16]; | |
6092 | uschar *tt = sub; | |
6093 | unsigned long int n = 0; | |
6094 | while (*tt != 0) | |
6095 | { | |
6096 | uschar *t = Ustrchr(base62_chars, *tt++); | |
6097 | if (t == NULL) | |
6098 | { | |
6099 | expand_string_message = string_sprintf("argument for base62d " | |
9a799bc0 PH |
6100 | "operator is \"%s\", which is not a base %d number", sub, |
6101 | BASE_62); | |
059ec3d9 PH |
6102 | goto EXPAND_FAILED; |
6103 | } | |
9a799bc0 | 6104 | n = n * BASE_62 + (t - base62_chars); |
059ec3d9 PH |
6105 | } |
6106 | (void)sprintf(CS buf, "%ld", n); | |
6107 | yield = string_cat(yield, &size, &ptr, buf, Ustrlen(buf)); | |
6108 | continue; | |
6109 | } | |
6110 | ||
6111 | case EOP_EXPAND: | |
6112 | { | |
b0e85a8f | 6113 | uschar *expanded = expand_string_internal(sub, FALSE, NULL, skipping, TRUE, &resetok); |
059ec3d9 PH |
6114 | if (expanded == NULL) |
6115 | { | |
6116 | expand_string_message = | |
6117 | string_sprintf("internal expansion of \"%s\" failed: %s", sub, | |
6118 | expand_string_message); | |
6119 | goto EXPAND_FAILED; | |
6120 | } | |
6121 | yield = string_cat(yield, &size, &ptr, expanded, Ustrlen(expanded)); | |
6122 | continue; | |
6123 | } | |
6124 | ||
6125 | case EOP_LC: | |
6126 | { | |
6127 | int count = 0; | |
6128 | uschar *t = sub - 1; | |
6129 | while (*(++t) != 0) { *t = tolower(*t); count++; } | |
6130 | yield = string_cat(yield, &size, &ptr, sub, count); | |
6131 | continue; | |
6132 | } | |
6133 | ||
6134 | case EOP_UC: | |
6135 | { | |
6136 | int count = 0; | |
6137 | uschar *t = sub - 1; | |
6138 | while (*(++t) != 0) { *t = toupper(*t); count++; } | |
6139 | yield = string_cat(yield, &size, &ptr, sub, count); | |
6140 | continue; | |
6141 | } | |
6142 | ||
6143 | case EOP_MD5: | |
80c974f8 | 6144 | #ifdef SUPPORT_TLS |
6a8a60e0 JH |
6145 | if (vp && *(void **)vp->value) |
6146 | { | |
6147 | uschar * cp = tls_cert_fprt_md5(*(void **)vp->value); | |
e3dd1d67 | 6148 | yield = string_cat(yield, &size, &ptr, cp, Ustrlen(cp)); |
6a8a60e0 JH |
6149 | } |
6150 | else | |
80c974f8 | 6151 | #endif |
6a8a60e0 JH |
6152 | { |
6153 | md5 base; | |
6154 | uschar digest[16]; | |
6155 | int j; | |
6156 | char st[33]; | |
6157 | md5_start(&base); | |
6158 | md5_end(&base, sub, Ustrlen(sub), digest); | |
6159 | for(j = 0; j < 16; j++) sprintf(st+2*j, "%02x", digest[j]); | |
6160 | yield = string_cat(yield, &size, &ptr, US st, (int)strlen(st)); | |
6161 | } | |
059ec3d9 | 6162 | continue; |
059ec3d9 PH |
6163 | |
6164 | case EOP_SHA1: | |
80c974f8 | 6165 | #ifdef SUPPORT_TLS |
6a8a60e0 JH |
6166 | if (vp && *(void **)vp->value) |
6167 | { | |
6168 | uschar * cp = tls_cert_fprt_sha1(*(void **)vp->value); | |
e3dd1d67 | 6169 | yield = string_cat(yield, &size, &ptr, cp, Ustrlen(cp)); |
6a8a60e0 JH |
6170 | } |
6171 | else | |
80c974f8 | 6172 | #endif |
6a8a60e0 JH |
6173 | { |
6174 | sha1 base; | |
6175 | uschar digest[20]; | |
6176 | int j; | |
6177 | char st[41]; | |
6178 | sha1_start(&base); | |
6179 | sha1_end(&base, sub, Ustrlen(sub), digest); | |
6180 | for(j = 0; j < 20; j++) sprintf(st+2*j, "%02X", digest[j]); | |
6181 | yield = string_cat(yield, &size, &ptr, US st, (int)strlen(st)); | |
6182 | } | |
059ec3d9 | 6183 | continue; |
059ec3d9 | 6184 | |
9ef9101c JH |
6185 | case EOP_SHA256: |
6186 | #ifdef SUPPORT_TLS | |
6187 | if (vp && *(void **)vp->value) | |
6188 | { | |
6189 | uschar * cp = tls_cert_fprt_sha256(*(void **)vp->value); | |
ca492d88 | 6190 | yield = string_cat(yield, &size, &ptr, cp, (int)Ustrlen(cp)); |
9ef9101c JH |
6191 | } |
6192 | else | |
6193 | #endif | |
6194 | expand_string_message = US"sha256 only supported for certificates"; | |
6195 | continue; | |
6196 | ||
059ec3d9 PH |
6197 | /* Convert hex encoding to base64 encoding */ |
6198 | ||
6199 | case EOP_HEX2B64: | |
6200 | { | |
6201 | int c = 0; | |
6202 | int b = -1; | |
6203 | uschar *in = sub; | |
6204 | uschar *out = sub; | |
6205 | uschar *enc; | |
6206 | ||
6207 | for (enc = sub; *enc != 0; enc++) | |
6208 | { | |
6209 | if (!isxdigit(*enc)) | |
6210 | { | |
6211 | expand_string_message = string_sprintf("\"%s\" is not a hex " | |
6212 | "string", sub); | |
6213 | goto EXPAND_FAILED; | |
6214 | } | |
6215 | c++; | |
6216 | } | |
6217 | ||
6218 | if ((c & 1) != 0) | |
6219 | { | |
6220 | expand_string_message = string_sprintf("\"%s\" contains an odd " | |
6221 | "number of characters", sub); | |
6222 | goto EXPAND_FAILED; | |
6223 | } | |
6224 | ||
6225 | while ((c = *in++) != 0) | |
6226 | { | |
6227 | if (isdigit(c)) c -= '0'; | |
6228 | else c = toupper(c) - 'A' + 10; | |
6229 | if (b == -1) | |
6230 | { | |
6231 | b = c << 4; | |
6232 | } | |
6233 | else | |
6234 | { | |
6235 | *out++ = b | c; | |
6236 | b = -1; | |
6237 | } | |
6238 | } | |
6239 | ||
6240 | enc = auth_b64encode(sub, out - sub); | |
6241 | yield = string_cat(yield, &size, &ptr, enc, Ustrlen(enc)); | |
6242 | continue; | |
6243 | } | |
6244 | ||
c393f931 TF |
6245 | /* Convert octets outside 0x21..0x7E to \xXX form */ |
6246 | ||
6247 | case EOP_HEXQUOTE: | |
6248 | { | |
6249 | uschar *t = sub - 1; | |
6250 | while (*(++t) != 0) | |
6251 | { | |
6252 | if (*t < 0x21 || 0x7E < *t) | |
6253 | yield = string_cat(yield, &size, &ptr, | |
6254 | string_sprintf("\\x%02x", *t), 4); | |
6255 | else | |
6256 | yield = string_cat(yield, &size, &ptr, t, 1); | |
6257 | } | |
6258 | continue; | |
6259 | } | |
6260 | ||
a64a3dfa JH |
6261 | /* count the number of list elements */ |
6262 | ||
6263 | case EOP_LISTCOUNT: | |
6264 | { | |
6265 | int cnt = 0; | |
6266 | int sep = 0; | |
6267 | uschar * cp; | |
6268 | uschar buffer[256]; | |
6269 | ||
55414b25 | 6270 | while (string_nextinlist(CUSS &sub, &sep, buffer, sizeof(buffer)) != NULL) cnt++; |
a64a3dfa JH |
6271 | cp = string_sprintf("%d", cnt); |
6272 | yield = string_cat(yield, &size, &ptr, cp, Ustrlen(cp)); | |
6273 | continue; | |
6274 | } | |
6275 | ||
042eb971 | 6276 | /* expand a named list given the name */ |
a64a3dfa | 6277 | /* handles nested named lists; requotes as colon-sep list */ |
042eb971 | 6278 | |
a64a3dfa | 6279 | case EOP_LISTNAMED: |
042eb971 JH |
6280 | { |
6281 | tree_node *t = NULL; | |
55414b25 | 6282 | const uschar * list; |
042eb971 JH |
6283 | int sep = 0; |
6284 | uschar * item; | |
6d9cfc47 | 6285 | uschar * suffix = US""; |
042eb971 JH |
6286 | BOOL needsep = FALSE; |
6287 | uschar buffer[256]; | |
6288 | ||
6289 | if (*sub == '+') sub++; | |
6290 | if (arg == NULL) /* no-argument version */ | |
6291 | { | |
6292 | if (!(t = tree_search(addresslist_anchor, sub)) && | |
6293 | !(t = tree_search(domainlist_anchor, sub)) && | |
6294 | !(t = tree_search(hostlist_anchor, sub))) | |
6295 | t = tree_search(localpartlist_anchor, sub); | |
6296 | } | |
6297 | else switch(*arg) /* specific list-type version */ | |
6298 | { | |
6d9cfc47 JH |
6299 | case 'a': t = tree_search(addresslist_anchor, sub); suffix = US"_a"; break; |
6300 | case 'd': t = tree_search(domainlist_anchor, sub); suffix = US"_d"; break; | |
6301 | case 'h': t = tree_search(hostlist_anchor, sub); suffix = US"_h"; break; | |
6302 | case 'l': t = tree_search(localpartlist_anchor, sub); suffix = US"_l"; break; | |
042eb971 JH |
6303 | default: |
6304 | expand_string_message = string_sprintf("bad suffix on \"list\" operator"); | |
6305 | goto EXPAND_FAILED; | |
6306 | } | |
6307 | ||
6308 | if(!t) | |
6309 | { | |
6310 | expand_string_message = string_sprintf("\"%s\" is not a %snamed list", | |
6311 | sub, !arg?"" | |
6312 | : *arg=='a'?"address " | |
6313 | : *arg=='d'?"domain " | |
6314 | : *arg=='h'?"host " | |
6315 | : *arg=='l'?"localpart " | |
6316 | : 0); | |
6317 | goto EXPAND_FAILED; | |
6318 | } | |
6319 | ||
042eb971 JH |
6320 | list = ((namedlist_block *)(t->data.ptr))->string; |
6321 | ||
6322 | while ((item = string_nextinlist(&list, &sep, buffer, sizeof(buffer))) != NULL) | |
6323 | { | |
6324 | uschar * buf = US" : "; | |
6325 | if (needsep) | |
6326 | yield = string_cat(yield, &size, &ptr, buf, 3); | |
6327 | else | |
6328 | needsep = TRUE; | |
6329 | ||
6330 | if (*item == '+') /* list item is itself a named list */ | |
6331 | { | |
a64a3dfa | 6332 | uschar * sub = string_sprintf("${listnamed%s:%s}", suffix, item); |
b0e85a8f | 6333 | item = expand_string_internal(sub, FALSE, NULL, FALSE, TRUE, &resetok); |
042eb971 JH |
6334 | } |
6335 | else if (sep != ':') /* item from non-colon-sep list, re-quote for colon list-separator */ | |
6336 | { | |
6337 | char * cp; | |
6338 | char tok[3]; | |
6339 | tok[0] = sep; tok[1] = ':'; tok[2] = 0; | |
6340 | while ((cp= strpbrk((const char *)item, tok))) | |
6341 | { | |
6342 | yield = string_cat(yield, &size, &ptr, item, cp-(char *)item); | |
6343 | if (*cp++ == ':') /* colon in a non-colon-sep list item, needs doubling */ | |
6344 | { | |
6345 | yield = string_cat(yield, &size, &ptr, US"::", 2); | |
6d9cfc47 | 6346 | item = (uschar *)cp; |
042eb971 JH |
6347 | } |
6348 | else /* sep in item; should already be doubled; emit once */ | |
6349 | { | |
6350 | yield = string_cat(yield, &size, &ptr, (uschar *)tok, 1); | |
6351 | if (*cp == sep) cp++; | |
6d9cfc47 | 6352 | item = (uschar *)cp; |
042eb971 JH |
6353 | } |
6354 | } | |
6355 | } | |
6356 | yield = string_cat(yield, &size, &ptr, item, Ustrlen(item)); | |
6357 | } | |
6358 | continue; | |
6359 | } | |
6360 | ||
059ec3d9 PH |
6361 | /* mask applies a mask to an IP address; for example the result of |
6362 | ${mask:131.111.10.206/28} is 131.111.10.192/28. */ | |
6363 | ||
6364 | case EOP_MASK: | |
6365 | { | |
6366 | int count; | |
6367 | uschar *endptr; | |
6368 | int binary[4]; | |
6369 | int mask, maskoffset; | |
6370 | int type = string_is_ip_address(sub, &maskoffset); | |
6371 | uschar buffer[64]; | |
6372 | ||
6373 | if (type == 0) | |
6374 | { | |
6375 | expand_string_message = string_sprintf("\"%s\" is not an IP address", | |
6376 | sub); | |
6377 | goto EXPAND_FAILED; | |
6378 | } | |
6379 | ||
6380 | if (maskoffset == 0) | |
6381 | { | |
6382 | expand_string_message = string_sprintf("missing mask value in \"%s\"", | |
6383 | sub); | |
6384 | goto EXPAND_FAILED; | |
6385 | } | |
6386 | ||
6387 | mask = Ustrtol(sub + maskoffset + 1, &endptr, 10); | |
6388 | ||
6389 | if (*endptr != 0 || mask < 0 || mask > ((type == 4)? 32 : 128)) | |
6390 | { | |
6391 | expand_string_message = string_sprintf("mask value too big in \"%s\"", | |
6392 | sub); | |
6393 | goto EXPAND_FAILED; | |
6394 | } | |
6395 | ||
6396 | /* Convert the address to binary integer(s) and apply the mask */ | |
6397 | ||
6398 | sub[maskoffset] = 0; | |
6399 | count = host_aton(sub, binary); | |
6400 | host_mask(count, binary, mask); | |
6401 | ||
6402 | /* Convert to masked textual format and add to output. */ | |
6403 | ||
6404 | yield = string_cat(yield, &size, &ptr, buffer, | |
6f0c9a4f | 6405 | host_nmtoa(count, binary, mask, buffer, '.')); |
059ec3d9 PH |
6406 | continue; |
6407 | } | |
6408 | ||
6409 | case EOP_ADDRESS: | |
6410 | case EOP_LOCAL_PART: | |
6411 | case EOP_DOMAIN: | |
6412 | { | |
6413 | uschar *error; | |
6414 | int start, end, domain; | |
6415 | uschar *t = parse_extract_address(sub, &error, &start, &end, &domain, | |
6416 | FALSE); | |
6417 | if (t != NULL) | |
6418 | { | |
6419 | if (c != EOP_DOMAIN) | |
6420 | { | |
6421 | if (c == EOP_LOCAL_PART && domain != 0) end = start + domain - 1; | |
6422 | yield = string_cat(yield, &size, &ptr, sub+start, end-start); | |
6423 | } | |
6424 | else if (domain != 0) | |
6425 | { | |
6426 | domain += start; | |
6427 | yield = string_cat(yield, &size, &ptr, sub+domain, end-domain); | |
6428 | } | |
6429 | } | |
6430 | continue; | |
6431 | } | |
6432 | ||
29f89cad PH |
6433 | case EOP_ADDRESSES: |
6434 | { | |
6435 | uschar outsep[2] = { ':', '\0' }; | |
6436 | uschar *address, *error; | |
6437 | int save_ptr = ptr; | |
6438 | int start, end, domain; /* Not really used */ | |
6439 | ||
6440 | while (isspace(*sub)) sub++; | |
6441 | if (*sub == '>') { *outsep = *++sub; ++sub; } | |
6442 | parse_allow_group = TRUE; | |
6443 | ||
6444 | for (;;) | |
6445 | { | |
6446 | uschar *p = parse_find_address_end(sub, FALSE); | |
6447 | uschar saveend = *p; | |
6448 | *p = '\0'; | |
6449 | address = parse_extract_address(sub, &error, &start, &end, &domain, | |
6450 | FALSE); | |
6451 | *p = saveend; | |
6452 | ||
6453 | /* Add the address to the output list that we are building. This is | |
6454 | done in chunks by searching for the separator character. At the | |
6455 | start, unless we are dealing with the first address of the output | |
6456 | list, add in a space if the new address begins with the separator | |
6457 | character, or is an empty string. */ | |
6458 | ||
6459 | if (address != NULL) | |
6460 | { | |
6461 | if (ptr != save_ptr && address[0] == *outsep) | |
6462 | yield = string_cat(yield, &size, &ptr, US" ", 1); | |
6463 | ||
6464 | for (;;) | |
6465 | { | |
6466 | size_t seglen = Ustrcspn(address, outsep); | |
6467 | yield = string_cat(yield, &size, &ptr, address, seglen + 1); | |
6468 | ||
6469 | /* If we got to the end of the string we output one character | |
6470 | too many. */ | |
6471 | ||
6472 | if (address[seglen] == '\0') { ptr--; break; } | |
6473 | yield = string_cat(yield, &size, &ptr, outsep, 1); | |
6474 | address += seglen + 1; | |
6475 | } | |
6476 | ||
6477 | /* Output a separator after the string: we will remove the | |
6478 | redundant final one at the end. */ | |
6479 | ||
6480 | yield = string_cat(yield, &size, &ptr, outsep, 1); | |
6481 | } | |
6482 | ||
6483 | if (saveend == '\0') break; | |
6484 | sub = p + 1; | |
6485 | } | |
6486 | ||
6487 | /* If we have generated anything, remove the redundant final | |
6488 | separator. */ | |
6489 | ||
6490 | if (ptr != save_ptr) ptr--; | |
6491 | parse_allow_group = FALSE; | |
6492 | continue; | |
6493 | } | |
6494 | ||
6495 | ||
059ec3d9 PH |
6496 | /* quote puts a string in quotes if it is empty or contains anything |
6497 | other than alphamerics, underscore, dot, or hyphen. | |
6498 | ||
6499 | quote_local_part puts a string in quotes if RFC 2821/2822 requires it to | |
6500 | be quoted in order to be a valid local part. | |
6501 | ||
6502 | In both cases, newlines and carriage returns are converted into \n and \r | |
6503 | respectively */ | |
6504 | ||
6505 | case EOP_QUOTE: | |
6506 | case EOP_QUOTE_LOCAL_PART: | |
6507 | if (arg == NULL) | |
6508 | { | |
6509 | BOOL needs_quote = (*sub == 0); /* TRUE for empty string */ | |
6510 | uschar *t = sub - 1; | |
6511 | ||
6512 | if (c == EOP_QUOTE) | |
6513 | { | |
6514 | while (!needs_quote && *(++t) != 0) | |
6515 | needs_quote = !isalnum(*t) && !strchr("_-.", *t); | |
6516 | } | |
6517 | else /* EOP_QUOTE_LOCAL_PART */ | |
6518 | { | |
6519 | while (!needs_quote && *(++t) != 0) | |
6520 | needs_quote = !isalnum(*t) && | |
6521 | strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL && | |
6522 | (*t != '.' || t == sub || t[1] == 0); | |
6523 | } | |
6524 | ||
6525 | if (needs_quote) | |
6526 | { | |
6527 | yield = string_cat(yield, &size, &ptr, US"\"", 1); | |
6528 | t = sub - 1; | |
6529 | while (*(++t) != 0) | |
6530 | { | |
6531 | if (*t == '\n') | |
6532 | yield = string_cat(yield, &size, &ptr, US"\\n", 2); | |
6533 | else if (*t == '\r') | |
6534 | yield = string_cat(yield, &size, &ptr, US"\\r", 2); | |
6535 | else | |
6536 | { | |
6537 | if (*t == '\\' || *t == '"') | |
6538 | yield = string_cat(yield, &size, &ptr, US"\\", 1); | |
6539 | yield = string_cat(yield, &size, &ptr, t, 1); | |
6540 | } | |
6541 | } | |
6542 | yield = string_cat(yield, &size, &ptr, US"\"", 1); | |
6543 | } | |
6544 | else yield = string_cat(yield, &size, &ptr, sub, Ustrlen(sub)); | |
6545 | continue; | |
6546 | } | |
6547 | ||
6548 | /* quote_lookuptype does lookup-specific quoting */ | |
6549 | ||
6550 | else | |
6551 | { | |
6552 | int n; | |
6553 | uschar *opt = Ustrchr(arg, '_'); | |
6554 | ||
6555 | if (opt != NULL) *opt++ = 0; | |
6556 | ||
6557 | n = search_findtype(arg, Ustrlen(arg)); | |
6558 | if (n < 0) | |
6559 | { | |
6560 | expand_string_message = search_error_message; | |
6561 | goto EXPAND_FAILED; | |
6562 | } | |
6563 | ||
e6d225ae DW |
6564 | if (lookup_list[n]->quote != NULL) |
6565 | sub = (lookup_list[n]->quote)(sub, opt); | |
059ec3d9 PH |
6566 | else if (opt != NULL) sub = NULL; |
6567 | ||
6568 | if (sub == NULL) | |
6569 | { | |
6570 | expand_string_message = string_sprintf( | |
6571 | "\"%s\" unrecognized after \"${quote_%s\"", | |
6572 | opt, arg); | |
6573 | goto EXPAND_FAILED; | |
6574 | } | |
6575 | ||
6576 | yield = string_cat(yield, &size, &ptr, sub, Ustrlen(sub)); | |
6577 | continue; | |
6578 | } | |
6579 | ||
6580 | /* rx quote sticks in \ before any non-alphameric character so that | |
6581 | the insertion works in a regular expression. */ | |
6582 | ||
6583 | case EOP_RXQUOTE: | |
6584 | { | |
6585 | uschar *t = sub - 1; | |
6586 | while (*(++t) != 0) | |
6587 | { | |
6588 | if (!isalnum(*t)) | |
6589 | yield = string_cat(yield, &size, &ptr, US"\\", 1); | |
6590 | yield = string_cat(yield, &size, &ptr, t, 1); | |
6591 | } | |
6592 | continue; | |
6593 | } | |
6594 | ||
6595 | /* RFC 2047 encodes, assuming headers_charset (default ISO 8859-1) as | |
6596 | prescribed by the RFC, if there are characters that need to be encoded */ | |
6597 | ||
6598 | case EOP_RFC2047: | |
6599 | { | |
14702f5b | 6600 | uschar buffer[2048]; |
55414b25 | 6601 | const uschar *string = parse_quote_2047(sub, Ustrlen(sub), headers_charset, |
46218253 | 6602 | buffer, sizeof(buffer), FALSE); |
059ec3d9 PH |
6603 | yield = string_cat(yield, &size, &ptr, string, Ustrlen(string)); |
6604 | continue; | |
6605 | } | |
6606 | ||
9c57cbc0 PH |
6607 | /* RFC 2047 decode */ |
6608 | ||
6609 | case EOP_RFC2047D: | |
6610 | { | |
6611 | int len; | |
6612 | uschar *error; | |
6613 | uschar *decoded = rfc2047_decode(sub, check_rfc2047_length, | |
6614 | headers_charset, '?', &len, &error); | |
6615 | if (error != NULL) | |
6616 | { | |
6617 | expand_string_message = error; | |
6618 | goto EXPAND_FAILED; | |
6619 | } | |
6620 | yield = string_cat(yield, &size, &ptr, decoded, len); | |
6621 | continue; | |
6622 | } | |
6623 | ||
059ec3d9 PH |
6624 | /* from_utf8 converts UTF-8 to 8859-1, turning non-existent chars into |
6625 | underscores */ | |
6626 | ||
6627 | case EOP_FROM_UTF8: | |
6628 | { | |
6629 | while (*sub != 0) | |
6630 | { | |
6631 | int c; | |
6632 | uschar buff[4]; | |
6633 | GETUTF8INC(c, sub); | |
6634 | if (c > 255) c = '_'; | |
6635 | buff[0] = c; | |
6636 | yield = string_cat(yield, &size, &ptr, buff, 1); | |
6637 | } | |
6638 | continue; | |
6639 | } | |
6640 | ||
b9c2e32f | 6641 | /* replace illegal UTF-8 sequences by replacement character */ |
94431adb | 6642 | |
b9c2e32f AR |
6643 | #define UTF8_REPLACEMENT_CHAR US"?" |
6644 | ||
6645 | case EOP_UTF8CLEAN: | |
6646 | { | |
85098ee7 | 6647 | int seq_len = 0, index = 0; |
e3dd1d67 | 6648 | int bytes_left = 0; |
e8e86723 | 6649 | long codepoint = -1; |
b9c2e32f | 6650 | uschar seq_buff[4]; /* accumulate utf-8 here */ |
94431adb | 6651 | |
b9c2e32f AR |
6652 | while (*sub != 0) |
6653 | { | |
e8e86723 JH |
6654 | int complete = 0; |
6655 | uschar c = *sub++; | |
b9c2e32f | 6656 | |
e3dd1d67 | 6657 | if (bytes_left) |
b9c2e32f AR |
6658 | { |
6659 | if ((c & 0xc0) != 0x80) | |
b9c2e32f AR |
6660 | /* wrong continuation byte; invalidate all bytes */ |
6661 | complete = 1; /* error */ | |
b9c2e32f AR |
6662 | else |
6663 | { | |
6664 | codepoint = (codepoint << 6) | (c & 0x3f); | |
6665 | seq_buff[index++] = c; | |
6666 | if (--bytes_left == 0) /* codepoint complete */ | |
b9c2e32f | 6667 | if(codepoint > 0x10FFFF) /* is it too large? */ |
e8e86723 | 6668 | complete = -1; /* error (RFC3629 limit) */ |
b9c2e32f AR |
6669 | else |
6670 | { /* finished; output utf-8 sequence */ | |
6671 | yield = string_cat(yield, &size, &ptr, seq_buff, seq_len); | |
6672 | index = 0; | |
6673 | } | |
b9c2e32f AR |
6674 | } |
6675 | } | |
6676 | else /* no bytes left: new sequence */ | |
6677 | { | |
6678 | if((c & 0x80) == 0) /* 1-byte sequence, US-ASCII, keep it */ | |
6679 | { | |
6680 | yield = string_cat(yield, &size, &ptr, &c, 1); | |
6681 | continue; | |
6682 | } | |
6683 | if((c & 0xe0) == 0xc0) /* 2-byte sequence */ | |
6684 | { | |
10cc8a1e AR |
6685 | if(c == 0xc0 || c == 0xc1) /* 0xc0 and 0xc1 are illegal */ |
6686 | complete = -1; | |
6687 | else | |
6688 | { | |
6689 | bytes_left = 1; | |
6690 | codepoint = c & 0x1f; | |
6691 | } | |
b9c2e32f AR |
6692 | } |
6693 | else if((c & 0xf0) == 0xe0) /* 3-byte sequence */ | |
6694 | { | |
6695 | bytes_left = 2; | |
6696 | codepoint = c & 0x0f; | |
6697 | } | |
6698 | else if((c & 0xf8) == 0xf0) /* 4-byte sequence */ | |
6699 | { | |
6700 | bytes_left = 3; | |
6701 | codepoint = c & 0x07; | |
6702 | } | |
6703 | else /* invalid or too long (RFC3629 allows only 4 bytes) */ | |
6704 | complete = -1; | |
6705 | ||
6706 | seq_buff[index++] = c; | |
6707 | seq_len = bytes_left + 1; | |
6708 | } /* if(bytes_left) */ | |
6709 | ||
6710 | if (complete != 0) | |
6711 | { | |
6712 | bytes_left = index = 0; | |
6713 | yield = string_cat(yield, &size, &ptr, UTF8_REPLACEMENT_CHAR, 1); | |
6714 | } | |
6715 | if ((complete == 1) && ((c & 0x80) == 0)) | |
4e08fd50 | 6716 | /* ASCII character follows incomplete sequence */ |
b9c2e32f | 6717 | yield = string_cat(yield, &size, &ptr, &c, 1); |
b9c2e32f AR |
6718 | } |
6719 | continue; | |
6720 | } | |
6721 | ||
4e08fd50 JH |
6722 | #ifdef EXPERIMENTAL_INTERNATIONAL |
6723 | case EOP_UTF8_DOMAIN_TO_ALABEL: | |
6724 | { | |
6725 | uschar * error = NULL; | |
6726 | uschar * s = string_domain_utf8_to_alabel(sub, &error); | |
6727 | if (error) | |
6728 | { | |
6729 | expand_string_message = string_sprintf( | |
6730 | "error converting utf8 (%s) to alabel: %s", | |
6731 | string_printing(sub), error); | |
6732 | goto EXPAND_FAILED; | |
6733 | } | |
6734 | yield = string_cat(yield, &size, &ptr, s, Ustrlen(s)); | |
6735 | continue; | |
6736 | } | |
6737 | ||
6738 | case EOP_UTF8_DOMAIN_FROM_ALABEL: | |
6739 | { | |
6740 | uschar * error = NULL; | |
6741 | uschar * s = string_domain_alabel_to_utf8(sub, &error); | |
6742 | if (error) | |
6743 | { | |
6744 | expand_string_message = string_sprintf( | |
6745 | "error converting alabel (%s) to utf8: %s", | |
6746 | string_printing(sub), error); | |
6747 | goto EXPAND_FAILED; | |
6748 | } | |
6749 | yield = string_cat(yield, &size, &ptr, s, Ustrlen(s)); | |
6750 | continue; | |
6751 | } | |
6752 | ||
6753 | case EOP_UTF8_LOCALPART_TO_ALABEL: | |
6754 | { | |
6755 | uschar * error = NULL; | |
6756 | uschar * s = string_localpart_utf8_to_alabel(sub, &error); | |
6757 | if (error) | |
6758 | { | |
6759 | expand_string_message = string_sprintf( | |
6760 | "error converting utf8 (%s) to alabel: %s", | |
6761 | string_printing(sub), error); | |
6762 | goto EXPAND_FAILED; | |
6763 | } | |
6764 | yield = string_cat(yield, &size, &ptr, s, Ustrlen(s)); | |
6765 | DEBUG(D_expand) debug_printf("yield: '%s'\n", yield); | |
6766 | continue; | |
6767 | } | |
6768 | ||
6769 | case EOP_UTF8_LOCALPART_FROM_ALABEL: | |
6770 | { | |
6771 | uschar * error = NULL; | |
6772 | uschar * s = string_localpart_alabel_to_utf8(sub, &error); | |
6773 | if (error) | |
6774 | { | |
6775 | expand_string_message = string_sprintf( | |
6776 | "error converting alabel (%s) to utf8: %s", | |
6777 | string_printing(sub), error); | |
6778 | goto EXPAND_FAILED; | |
6779 | } | |
6780 | yield = string_cat(yield, &size, &ptr, s, Ustrlen(s)); | |
6781 | continue; | |
6782 | } | |
6783 | #endif /* EXPERIMENTAL_INTERNATIONAL */ | |
6784 | ||
059ec3d9 PH |
6785 | /* escape turns all non-printing characters into escape sequences. */ |
6786 | ||
6787 | case EOP_ESCAPE: | |
6788 | { | |
55414b25 | 6789 | const uschar *t = string_printing(sub); |
059ec3d9 PH |
6790 | yield = string_cat(yield, &size, &ptr, t, Ustrlen(t)); |
6791 | continue; | |
6792 | } | |
6793 | ||
6794 | /* Handle numeric expression evaluation */ | |
6795 | ||
6796 | case EOP_EVAL: | |
6797 | case EOP_EVAL10: | |
6798 | { | |
6799 | uschar *save_sub = sub; | |
6800 | uschar *error = NULL; | |
97d17305 | 6801 | int_eximarith_t n = eval_expr(&sub, (c == EOP_EVAL10), &error, FALSE); |
059ec3d9 PH |
6802 | if (error != NULL) |
6803 | { | |
6804 | expand_string_message = string_sprintf("error in expression " | |
6805 | "evaluation: %s (after processing \"%.*s\")", error, sub-save_sub, | |
6806 | save_sub); | |
6807 | goto EXPAND_FAILED; | |
6808 | } | |
97d17305 | 6809 | sprintf(CS var_buffer, PR_EXIM_ARITH, n); |
059ec3d9 PH |
6810 | yield = string_cat(yield, &size, &ptr, var_buffer, Ustrlen(var_buffer)); |
6811 | continue; | |
6812 | } | |
6813 | ||
6814 | /* Handle time period formating */ | |
6815 | ||
f90d018c PH |
6816 | case EOP_TIME_EVAL: |
6817 | { | |
6818 | int n = readconf_readtime(sub, 0, FALSE); | |
6819 | if (n < 0) | |
6820 | { | |
6821 | expand_string_message = string_sprintf("string \"%s\" is not an " | |
6822 | "Exim time interval in \"%s\" operator", sub, name); | |
6823 | goto EXPAND_FAILED; | |
6824 | } | |
6825 | sprintf(CS var_buffer, "%d", n); | |
6826 | yield = string_cat(yield, &size, &ptr, var_buffer, Ustrlen(var_buffer)); | |
6827 | continue; | |
6828 | } | |
6829 | ||
059ec3d9 PH |
6830 | case EOP_TIME_INTERVAL: |
6831 | { | |
6832 | int n; | |
6833 | uschar *t = read_number(&n, sub); | |
6834 | if (*t != 0) /* Not A Number*/ | |
6835 | { | |
6836 | expand_string_message = string_sprintf("string \"%s\" is not a " | |
6837 | "positive number in \"%s\" operator", sub, name); | |
6838 | goto EXPAND_FAILED; | |
6839 | } | |
6840 | t = readconf_printtime(n); | |
6841 | yield = string_cat(yield, &size, &ptr, t, Ustrlen(t)); | |
6842 | continue; | |
6843 | } | |
6844 | ||
6845 | /* Convert string to base64 encoding */ | |
6846 | ||
6847 | case EOP_STR2B64: | |
6848 | { | |
6849 | uschar *encstr = auth_b64encode(sub, Ustrlen(sub)); | |
6850 | yield = string_cat(yield, &size, &ptr, encstr, Ustrlen(encstr)); | |
6851 | continue; | |
6852 | } | |
6853 | ||
6854 | /* strlen returns the length of the string */ | |
6855 | ||
6856 | case EOP_STRLEN: | |
6857 | { | |
6858 | uschar buff[24]; | |
6859 | (void)sprintf(CS buff, "%d", Ustrlen(sub)); | |
6860 | yield = string_cat(yield, &size, &ptr, buff, Ustrlen(buff)); | |
6861 | continue; | |
6862 | } | |
6863 | ||
6864 | /* length_n or l_n takes just the first n characters or the whole string, | |
6865 | whichever is the shorter; | |
6866 | ||
6867 | substr_m_n, and s_m_n take n characters from offset m; negative m take | |
6868 | from the end; l_n is synonymous with s_0_n. If n is omitted in substr it | |
6869 | takes the rest, either to the right or to the left. | |
6870 | ||
6871 | hash_n or h_n makes a hash of length n from the string, yielding n | |
6872 | characters from the set a-z; hash_n_m makes a hash of length n, but | |
6873 | uses m characters from the set a-zA-Z0-9. | |
6874 | ||
6875 | nhash_n returns a single number between 0 and n-1 (in text form), while | |
6876 | nhash_n_m returns a div/mod hash as two numbers "a/b". The first lies | |
6877 | between 0 and n-1 and the second between 0 and m-1. */ | |
6878 | ||
6879 | case EOP_LENGTH: | |
6880 | case EOP_L: | |
6881 | case EOP_SUBSTR: | |
6882 | case EOP_S: | |
6883 | case EOP_HASH: | |
6884 | case EOP_H: | |
6885 | case EOP_NHASH: | |
6886 | case EOP_NH: | |
6887 | { | |
6888 | int sign = 1; | |
6889 | int value1 = 0; | |
6890 | int value2 = -1; | |
6891 | int *pn; | |
6892 | int len; | |
6893 | uschar *ret; | |
6894 | ||
6895 | if (arg == NULL) | |
6896 | { | |
6897 | expand_string_message = string_sprintf("missing values after %s", | |
6898 | name); | |
6899 | goto EXPAND_FAILED; | |
6900 | } | |
6901 | ||
6902 | /* "length" has only one argument, effectively being synonymous with | |
6903 | substr_0_n. */ | |
6904 | ||
6905 | if (c == EOP_LENGTH || c == EOP_L) | |
6906 | { | |
6907 | pn = &value2; | |
6908 | value2 = 0; | |
6909 | } | |
6910 | ||
6911 | /* The others have one or two arguments; for "substr" the first may be | |
6912 | negative. The second being negative means "not supplied". */ | |
6913 | ||
6914 | else | |
6915 | { | |
6916 | pn = &value1; | |
6917 | if (name[0] == 's' && *arg == '-') { sign = -1; arg++; } | |
6918 | } | |
6919 | ||
6920 | /* Read up to two numbers, separated by underscores */ | |
6921 | ||
6922 | ret = arg; | |
6923 | while (*arg != 0) | |
6924 | { | |
6925 | if (arg != ret && *arg == '_' && pn == &value1) | |
6926 | { | |
6927 | pn = &value2; | |
6928 | value2 = 0; | |
6929 | if (arg[1] != 0) arg++; | |
6930 | } | |
6931 | else if (!isdigit(*arg)) | |
6932 | { | |
6933 | expand_string_message = | |
6934 | string_sprintf("non-digit after underscore in \"%s\"", name); | |
6935 | goto EXPAND_FAILED; | |
6936 | } | |
6937 | else *pn = (*pn)*10 + *arg++ - '0'; | |
6938 | } | |
6939 | value1 *= sign; | |
6940 | ||
6941 | /* Perform the required operation */ | |
6942 | ||
6943 | ret = | |
6944 | (c == EOP_HASH || c == EOP_H)? | |
6945 | compute_hash(sub, value1, value2, &len) : | |
6946 | (c == EOP_NHASH || c == EOP_NH)? | |
6947 | compute_nhash(sub, value1, value2, &len) : | |
6948 | extract_substr(sub, value1, value2, &len); | |
6949 | ||
6950 | if (ret == NULL) goto EXPAND_FAILED; | |
6951 | yield = string_cat(yield, &size, &ptr, ret, len); | |
6952 | continue; | |
6953 | } | |
6954 | ||
6955 | /* Stat a path */ | |
6956 | ||
6957 | case EOP_STAT: | |
6958 | { | |
6959 | uschar *s; | |
6960 | uschar smode[12]; | |
6961 | uschar **modetable[3]; | |
6962 | int i; | |
6963 | mode_t mode; | |
6964 | struct stat st; | |
6965 | ||
254e032f PH |
6966 | if ((expand_forbid & RDO_EXISTS) != 0) |
6967 | { | |
6968 | expand_string_message = US"Use of the stat() expansion is not permitted"; | |
6969 | goto EXPAND_FAILED; | |
6970 | } | |
6971 | ||
059ec3d9 PH |
6972 | if (stat(CS sub, &st) < 0) |
6973 | { | |
6974 | expand_string_message = string_sprintf("stat(%s) failed: %s", | |
6975 | sub, strerror(errno)); | |
6976 | goto EXPAND_FAILED; | |
6977 | } | |
6978 | mode = st.st_mode; | |
6979 | switch (mode & S_IFMT) | |
6980 | { | |
6981 | case S_IFIFO: smode[0] = 'p'; break; | |
6982 | case S_IFCHR: smode[0] = 'c'; break; | |
6983 | case S_IFDIR: smode[0] = 'd'; break; | |
6984 | case S_IFBLK: smode[0] = 'b'; break; | |
6985 | case S_IFREG: smode[0] = '-'; break; | |
6986 | default: smode[0] = '?'; break; | |
6987 | } | |
6988 | ||
6989 | modetable[0] = ((mode & 01000) == 0)? mtable_normal : mtable_sticky; | |
6990 | modetable[1] = ((mode & 02000) == 0)? mtable_normal : mtable_setid; | |
6991 | modetable[2] = ((mode & 04000) == 0)? mtable_normal : mtable_setid; | |
6992 | ||
6993 | for (i = 0; i < 3; i++) | |
6994 | { | |
6995 | memcpy(CS(smode + 7 - i*3), CS(modetable[i][mode & 7]), 3); | |
6996 | mode >>= 3; | |
6997 | } | |
6998 | ||
6999 | smode[10] = 0; | |
7000 | s = string_sprintf("mode=%04lo smode=%s inode=%ld device=%ld links=%ld " | |
b1c749bb | 7001 | "uid=%ld gid=%ld size=" OFF_T_FMT " atime=%ld mtime=%ld ctime=%ld", |
059ec3d9 PH |
7002 | (long)(st.st_mode & 077777), smode, (long)st.st_ino, |
7003 | (long)st.st_dev, (long)st.st_nlink, (long)st.st_uid, | |
b1c749bb | 7004 | (long)st.st_gid, st.st_size, (long)st.st_atime, |
059ec3d9 PH |
7005 | (long)st.st_mtime, (long)st.st_ctime); |
7006 | yield = string_cat(yield, &size, &ptr, s, Ustrlen(s)); | |
7007 | continue; | |
7008 | } | |
7009 | ||
17c76198 | 7010 | /* vaguely random number less than N */ |
9e3331ea TK |
7011 | |
7012 | case EOP_RANDINT: | |
7013 | { | |
97d17305 | 7014 | int_eximarith_t max; |
9e3331ea TK |
7015 | uschar *s; |
7016 | ||
7685ce68 | 7017 | max = expanded_string_integer(sub, TRUE); |
9e3331ea TK |
7018 | if (expand_string_message != NULL) |
7019 | goto EXPAND_FAILED; | |
17c76198 | 7020 | s = string_sprintf("%d", vaguely_random_number((int)max)); |
9e3331ea TK |
7021 | yield = string_cat(yield, &size, &ptr, s, Ustrlen(s)); |
7022 | continue; | |
7023 | } | |
7024 | ||
83e029d5 PP |
7025 | /* Reverse IP, including IPv6 to dotted-nibble */ |
7026 | ||
7027 | case EOP_REVERSE_IP: | |
7028 | { | |
7029 | int family, maskptr; | |
7030 | uschar reversed[128]; | |
7031 | ||
7032 | family = string_is_ip_address(sub, &maskptr); | |
7033 | if (family == 0) | |
7034 | { | |
7035 | expand_string_message = string_sprintf( | |
7036 | "reverse_ip() not given an IP address [%s]", sub); | |
7037 | goto EXPAND_FAILED; | |
7038 | } | |
7039 | invert_address(reversed, sub); | |
7040 | yield = string_cat(yield, &size, &ptr, reversed, Ustrlen(reversed)); | |
7041 | continue; | |
7042 | } | |
7043 | ||
059ec3d9 PH |
7044 | /* Unknown operator */ |
7045 | ||
7046 | default: | |
7047 | expand_string_message = | |
7048 | string_sprintf("unknown expansion operator \"%s\"", name); | |
7049 | goto EXPAND_FAILED; | |
7050 | } | |
7051 | } | |
7052 | ||
7053 | /* Handle a plain name. If this is the first thing in the expansion, release | |
7054 | the pre-allocated buffer. If the result data is known to be in a new buffer, | |
7055 | newsize will be set to the size of that buffer, and we can just point at that | |
7056 | store instead of copying. Many expansion strings contain just one reference, | |
7057 | so this is a useful optimization, especially for humungous headers | |
7058 | ($message_headers). */ | |
2e23003a | 7059 | /*{*/ |
059ec3d9 PH |
7060 | if (*s++ == '}') |
7061 | { | |
7062 | int len; | |
7063 | int newsize = 0; | |
7064 | if (ptr == 0) | |
7065 | { | |
d6b4d938 | 7066 | if (resetok) store_reset(yield); |
059ec3d9 PH |
7067 | yield = NULL; |
7068 | size = 0; | |
7069 | } | |
7070 | value = find_variable(name, FALSE, skipping, &newsize); | |
7071 | if (value == NULL) | |
7072 | { | |
7073 | expand_string_message = | |
7074 | string_sprintf("unknown variable in \"${%s}\"", name); | |
641cb756 | 7075 | check_variable_error_message(name); |
059ec3d9 PH |
7076 | goto EXPAND_FAILED; |
7077 | } | |
7078 | len = Ustrlen(value); | |
7079 | if (yield == NULL && newsize != 0) | |
7080 | { | |
7081 | yield = value; | |
7082 | size = newsize; | |
7083 | ptr = len; | |
7084 | } | |
7085 | else yield = string_cat(yield, &size, &ptr, value, len); | |
7086 | continue; | |
7087 | } | |
7088 | ||
7089 | /* Else there's something wrong */ | |
7090 | ||
7091 | expand_string_message = | |
7092 | string_sprintf("\"${%s\" is not a known operator (or a } is missing " | |
7093 | "in a variable reference)", name); | |
7094 | goto EXPAND_FAILED; | |
7095 | } | |
7096 | ||
7097 | /* If we hit the end of the string when ket_ends is set, there is a missing | |
7098 | terminating brace. */ | |
7099 | ||
7100 | if (ket_ends && *s == 0) | |
7101 | { | |
7102 | expand_string_message = malformed_header? | |
7103 | US"missing } at end of string - could be header name not terminated by colon" | |
7104 | : | |
7105 | US"missing } at end of string"; | |
7106 | goto EXPAND_FAILED; | |
7107 | } | |
7108 | ||
7109 | /* Expansion succeeded; yield may still be NULL here if nothing was actually | |
7110 | added to the string. If so, set up an empty string. Add a terminating zero. If | |
7111 | left != NULL, return a pointer to the terminator. */ | |
7112 | ||
7113 | if (yield == NULL) yield = store_get(1); | |
7114 | yield[ptr] = 0; | |
7115 | if (left != NULL) *left = s; | |
7116 | ||
7117 | /* Any stacking store that was used above the final string is no longer needed. | |
7118 | In many cases the final string will be the first one that was got and so there | |
7119 | will be optimal store usage. */ | |
7120 | ||
d6b4d938 | 7121 | if (resetok) store_reset(yield + ptr + 1); |
b0e85a8f JH |
7122 | else if (resetok_p) *resetok_p = FALSE; |
7123 | ||
059ec3d9 PH |
7124 | DEBUG(D_expand) |
7125 | { | |
7126 | debug_printf("expanding: %.*s\n result: %s\n", (int)(s - string), string, | |
7127 | yield); | |
7128 | if (skipping) debug_printf("skipping: result is not used\n"); | |
7129 | } | |
7130 | return yield; | |
7131 | ||
7132 | /* This is the failure exit: easiest to program with a goto. We still need | |
7133 | to update the pointer to the terminator, for cases of nested calls with "fail". | |
7134 | */ | |
7135 | ||
7136 | EXPAND_FAILED_CURLY: | |
7137 | expand_string_message = malformed_header? | |
7138 | US"missing or misplaced { or } - could be header name not terminated by colon" | |
7139 | : | |
7140 | US"missing or misplaced { or }"; | |
7141 | ||
7142 | /* At one point, Exim reset the store to yield (if yield was not NULL), but | |
7143 | that is a bad idea, because expand_string_message is in dynamic store. */ | |
7144 | ||
7145 | EXPAND_FAILED: | |
7146 | if (left != NULL) *left = s; | |
7147 | DEBUG(D_expand) | |
7148 | { | |
7149 | debug_printf("failed to expand: %s\n", string); | |
7150 | debug_printf(" error message: %s\n", expand_string_message); | |
7151 | if (expand_string_forcedfail) debug_printf("failure was forced\n"); | |
7152 | } | |
b0e85a8f | 7153 | if (resetok_p) *resetok_p = resetok; |
059ec3d9 PH |
7154 | return NULL; |
7155 | } | |
7156 | ||
7157 | ||
7158 | /* This is the external function call. Do a quick check for any expansion | |
7159 | metacharacters, and if there are none, just return the input string. | |
7160 | ||
7161 | Argument: the string to be expanded | |
7162 | Returns: the expanded string, or NULL if expansion failed; if failure was | |
7163 | due to a lookup deferring, search_find_defer will be TRUE | |
7164 | */ | |
7165 | ||
7166 | uschar * | |
7167 | expand_string(uschar *string) | |
7168 | { | |
7169 | search_find_defer = FALSE; | |
7170 | malformed_header = FALSE; | |
7171 | return (Ustrpbrk(string, "$\\") == NULL)? string : | |
b0e85a8f | 7172 | expand_string_internal(string, FALSE, NULL, FALSE, TRUE, NULL); |
059ec3d9 PH |
7173 | } |
7174 | ||
7175 | ||
7176 | ||
55414b25 JH |
7177 | const uschar * |
7178 | expand_cstring(const uschar *string) | |
7179 | { | |
7180 | search_find_defer = FALSE; | |
7181 | malformed_header = FALSE; | |
7182 | return (Ustrpbrk(string, "$\\") == NULL)? string : | |
7183 | expand_string_internal(string, FALSE, NULL, FALSE, TRUE, NULL); | |
7184 | } | |
7185 | ||
7186 | ||
7187 | ||
059ec3d9 PH |
7188 | /************************************************* |
7189 | * Expand and copy * | |
7190 | *************************************************/ | |
7191 | ||
7192 | /* Now and again we want to expand a string and be sure that the result is in a | |
7193 | new bit of store. This function does that. | |
55414b25 | 7194 | Since we know it has been copied, the de-const cast is safe. |
059ec3d9 PH |
7195 | |
7196 | Argument: the string to be expanded | |
7197 | Returns: the expanded string, always in a new bit of store, or NULL | |
7198 | */ | |
7199 | ||
7200 | uschar * | |
55414b25 | 7201 | expand_string_copy(const uschar *string) |
059ec3d9 | 7202 | { |
55414b25 | 7203 | const uschar *yield = expand_cstring(string); |
059ec3d9 | 7204 | if (yield == string) yield = string_copy(string); |
55414b25 | 7205 | return US yield; |
059ec3d9 PH |
7206 | } |
7207 | ||
7208 | ||
7209 | ||
7210 | /************************************************* | |
7211 | * Expand and interpret as an integer * | |
7212 | *************************************************/ | |
7213 | ||
7214 | /* Expand a string, and convert the result into an integer. | |
7215 | ||
d45b1de8 PH |
7216 | Arguments: |
7217 | string the string to be expanded | |
7218 | isplus TRUE if a non-negative number is expected | |
059ec3d9 PH |
7219 | |
7220 | Returns: the integer value, or | |
7221 | -1 for an expansion error ) in both cases, message in | |
7222 | -2 for an integer interpretation error ) expand_string_message | |
d45b1de8 | 7223 | expand_string_message is set NULL for an OK integer |
059ec3d9 PH |
7224 | */ |
7225 | ||
97d17305 | 7226 | int_eximarith_t |
d45b1de8 | 7227 | expand_string_integer(uschar *string, BOOL isplus) |
059ec3d9 | 7228 | { |
7685ce68 TF |
7229 | return expanded_string_integer(expand_string(string), isplus); |
7230 | } | |
7231 | ||
7232 | ||
7233 | /************************************************* | |
7234 | * Interpret string as an integer * | |
7235 | *************************************************/ | |
7236 | ||
7237 | /* Convert a string (that has already been expanded) into an integer. | |
7238 | ||
7239 | This function is used inside the expansion code. | |
7240 | ||
7241 | Arguments: | |
7242 | s the string to be expanded | |
7243 | isplus TRUE if a non-negative number is expected | |
7244 | ||
7245 | Returns: the integer value, or | |
7246 | -1 if string is NULL (which implies an expansion error) | |
7247 | -2 for an integer interpretation error | |
7248 | expand_string_message is set NULL for an OK integer | |
7249 | */ | |
7250 | ||
7251 | static int_eximarith_t | |
55414b25 | 7252 | expanded_string_integer(const uschar *s, BOOL isplus) |
7685ce68 | 7253 | { |
97d17305 | 7254 | int_eximarith_t value; |
059ec3d9 PH |
7255 | uschar *msg = US"invalid integer \"%s\""; |
7256 | uschar *endptr; | |
7257 | ||
d45b1de8 PH |
7258 | /* If expansion failed, expand_string_message will be set. */ |
7259 | ||
059ec3d9 PH |
7260 | if (s == NULL) return -1; |
7261 | ||
7262 | /* On an overflow, strtol() returns LONG_MAX or LONG_MIN, and sets errno | |
7263 | to ERANGE. When there isn't an overflow, errno is not changed, at least on some | |
7264 | systems, so we set it zero ourselves. */ | |
7265 | ||
7266 | errno = 0; | |
d45b1de8 | 7267 | expand_string_message = NULL; /* Indicates no error */ |
b52bc06e NM |
7268 | |
7269 | /* Before Exim 4.64, strings consisting entirely of whitespace compared | |
7270 | equal to 0. Unfortunately, people actually relied upon that, so preserve | |
7271 | the behaviour explicitly. Stripping leading whitespace is a harmless | |
7272 | noop change since strtol skips it anyway (provided that there is a number | |
7273 | to find at all). */ | |
7274 | if (isspace(*s)) | |
7275 | { | |
7276 | while (isspace(*s)) ++s; | |
7277 | if (*s == '\0') | |
7278 | { | |
7279 | DEBUG(D_expand) | |
7280 | debug_printf("treating blank string as number 0\n"); | |
7281 | return 0; | |
7282 | } | |
7283 | } | |
7284 | ||
aa7c82b2 | 7285 | value = strtoll(CS s, CSS &endptr, 10); |
059ec3d9 PH |
7286 | |
7287 | if (endptr == s) | |
7288 | { | |
7289 | msg = US"integer expected but \"%s\" found"; | |
7290 | } | |
d45b1de8 PH |
7291 | else if (value < 0 && isplus) |
7292 | { | |
7293 | msg = US"non-negative integer expected but \"%s\" found"; | |
7294 | } | |
059ec3d9 PH |
7295 | else |
7296 | { | |
4eb9d6ef | 7297 | switch (tolower(*endptr)) |
059ec3d9 | 7298 | { |
4eb9d6ef JH |
7299 | default: |
7300 | break; | |
7301 | case 'k': | |
4328fd3c | 7302 | if (value > EXIM_ARITH_MAX/1024 || value < EXIM_ARITH_MIN/1024) errno = ERANGE; |
aa7c82b2 | 7303 | else value *= 1024; |
4eb9d6ef JH |
7304 | endptr++; |
7305 | break; | |
7306 | case 'm': | |
4328fd3c | 7307 | if (value > EXIM_ARITH_MAX/(1024*1024) || value < EXIM_ARITH_MIN/(1024*1024)) errno = ERANGE; |
4eb9d6ef JH |
7308 | else value *= 1024*1024; |
7309 | endptr++; | |
7310 | break; | |
7311 | case 'g': | |
4328fd3c | 7312 | if (value > EXIM_ARITH_MAX/(1024*1024*1024) || value < EXIM_ARITH_MIN/(1024*1024*1024)) errno = ERANGE; |
4eb9d6ef JH |
7313 | else value *= 1024*1024*1024; |
7314 | endptr++; | |
7315 | break; | |
059ec3d9 PH |
7316 | } |
7317 | if (errno == ERANGE) | |
7318 | msg = US"absolute value of integer \"%s\" is too large (overflow)"; | |
7319 | else | |
7320 | { | |
7321 | while (isspace(*endptr)) endptr++; | |
725735cd | 7322 | if (*endptr == 0) return value; |
059ec3d9 PH |
7323 | } |
7324 | } | |
7325 | ||
7326 | expand_string_message = string_sprintf(CS msg, s); | |
7327 | return -2; | |
7328 | } | |
7329 | ||
059ec3d9 | 7330 | |
9c695f6d JH |
7331 | /* These values are usually fixed boolean values, but they are permitted to be |
7332 | expanded strings. | |
7333 | ||
7334 | Arguments: | |
7335 | addr address being routed | |
7336 | mtype the module type | |
7337 | mname the module name | |
7338 | dbg_opt debug selectors | |
7339 | oname the option name | |
7340 | bvalue the router's boolean value | |
7341 | svalue the router's string value | |
7342 | rvalue where to put the returned value | |
7343 | ||
7344 | Returns: OK value placed in rvalue | |
7345 | DEFER expansion failed | |
7346 | */ | |
7347 | ||
7348 | int | |
7349 | exp_bool(address_item *addr, | |
7350 | uschar *mtype, uschar *mname, unsigned dbg_opt, | |
7351 | uschar *oname, BOOL bvalue, | |
7352 | uschar *svalue, BOOL *rvalue) | |
7353 | { | |
7354 | uschar *expanded; | |
7355 | if (svalue == NULL) { *rvalue = bvalue; return OK; } | |
7356 | ||
7357 | expanded = expand_string(svalue); | |
7358 | if (expanded == NULL) | |
7359 | { | |
7360 | if (expand_string_forcedfail) | |
7361 | { | |
7362 | DEBUG(dbg_opt) debug_printf("expansion of \"%s\" forced failure\n", oname); | |
7363 | *rvalue = bvalue; | |
7364 | return OK; | |
7365 | } | |
7366 | addr->message = string_sprintf("failed to expand \"%s\" in %s %s: %s", | |
7367 | oname, mname, mtype, expand_string_message); | |
7368 | DEBUG(dbg_opt) debug_printf("%s\n", addr->message); | |
7369 | return DEFER; | |
7370 | } | |
7371 | ||
7372 | DEBUG(dbg_opt) debug_printf("expansion of \"%s\" yields \"%s\"\n", oname, | |
7373 | expanded); | |
7374 | ||
7375 | if (strcmpic(expanded, US"true") == 0 || strcmpic(expanded, US"yes") == 0) | |
7376 | *rvalue = TRUE; | |
7377 | else if (strcmpic(expanded, US"false") == 0 || strcmpic(expanded, US"no") == 0) | |
7378 | *rvalue = FALSE; | |
7379 | else | |
7380 | { | |
7381 | addr->message = string_sprintf("\"%s\" is not a valid value for the " | |
7382 | "\"%s\" option in the %s %s", expanded, oname, mname, mtype); | |
7383 | return DEFER; | |
7384 | } | |
7385 | ||
7386 | return OK; | |
7387 | } | |
7388 | ||
7389 | ||
7390 | ||
7391 | ||
059ec3d9 PH |
7392 | /************************************************* |
7393 | ************************************************** | |
7394 | * Stand-alone test program * | |
7395 | ************************************************** | |
7396 | *************************************************/ | |
7397 | ||
7398 | #ifdef STAND_ALONE | |
7399 | ||
7400 | ||
7401 | BOOL | |
7402 | regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup) | |
7403 | { | |
7404 | int ovector[3*(EXPAND_MAXN+1)]; | |
7405 | int n = pcre_exec(re, NULL, subject, Ustrlen(subject), 0, PCRE_EOPT|options, | |
0539a19d | 7406 | ovector, nelem(ovector)); |
059ec3d9 PH |
7407 | BOOL yield = n >= 0; |
7408 | if (n == 0) n = EXPAND_MAXN + 1; | |
7409 | if (yield) | |
7410 | { | |
7411 | int nn; | |
7412 | expand_nmax = (setup < 0)? 0 : setup + 1; | |
7413 | for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2) | |
7414 | { | |
7415 | expand_nstring[expand_nmax] = subject + ovector[nn]; | |
7416 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; | |
7417 | } | |
7418 | expand_nmax--; | |
7419 | } | |
7420 | return yield; | |
7421 | } | |
7422 | ||
7423 | ||
7424 | int main(int argc, uschar **argv) | |
7425 | { | |
7426 | int i; | |
7427 | uschar buffer[1024]; | |
7428 | ||
7429 | debug_selector = D_v; | |
7430 | debug_file = stderr; | |
7431 | debug_fd = fileno(debug_file); | |
7432 | big_buffer = malloc(big_buffer_size); | |
7433 | ||
7434 | for (i = 1; i < argc; i++) | |
7435 | { | |
7436 | if (argv[i][0] == '+') | |
7437 | { | |
7438 | debug_trace_memory = 2; | |
7439 | argv[i]++; | |
7440 | } | |
7441 | if (isdigit(argv[i][0])) | |
7442 | debug_selector = Ustrtol(argv[i], NULL, 0); | |
7443 | else | |
7444 | if (Ustrspn(argv[i], "abcdefghijklmnopqrtsuvwxyz0123456789-.:/") == | |
7445 | Ustrlen(argv[i])) | |
7446 | { | |
7447 | #ifdef LOOKUP_LDAP | |
7448 | eldap_default_servers = argv[i]; | |
7449 | #endif | |
7450 | #ifdef LOOKUP_MYSQL | |
7451 | mysql_servers = argv[i]; | |
7452 | #endif | |
7453 | #ifdef LOOKUP_PGSQL | |
7454 | pgsql_servers = argv[i]; | |
7455 | #endif | |
9bdd29ad TL |
7456 | #ifdef EXPERIMENTAL_REDIS |
7457 | redis_servers = argv[i]; | |
7458 | #endif | |
059ec3d9 PH |
7459 | } |
7460 | #ifdef EXIM_PERL | |
7461 | else opt_perl_startup = argv[i]; | |
7462 | #endif | |
7463 | } | |
7464 | ||
7465 | printf("Testing string expansion: debug_level = %d\n\n", debug_level); | |
7466 | ||
7467 | expand_nstring[1] = US"string 1...."; | |
7468 | expand_nlength[1] = 8; | |
7469 | expand_nmax = 1; | |
7470 | ||
7471 | #ifdef EXIM_PERL | |
7472 | if (opt_perl_startup != NULL) | |
7473 | { | |
7474 | uschar *errstr; | |
7475 | printf("Starting Perl interpreter\n"); | |
7476 | errstr = init_perl(opt_perl_startup); | |
7477 | if (errstr != NULL) | |
7478 | { | |
7479 | printf("** error in perl_startup code: %s\n", errstr); | |
7480 | return EXIT_FAILURE; | |
7481 | } | |
7482 | } | |
7483 | #endif /* EXIM_PERL */ | |
7484 | ||
7485 | while (fgets(buffer, sizeof(buffer), stdin) != NULL) | |
7486 | { | |
7487 | void *reset_point = store_get(0); | |
7488 | uschar *yield = expand_string(buffer); | |
7489 | if (yield != NULL) | |
7490 | { | |
7491 | printf("%s\n", yield); | |
7492 | store_reset(reset_point); | |
7493 | } | |
7494 | else | |
7495 | { | |
7496 | if (search_find_defer) printf("search_find deferred\n"); | |
7497 | printf("Failed: %s\n", expand_string_message); | |
7498 | if (expand_string_forcedfail) printf("Forced failure\n"); | |
7499 | printf("\n"); | |
7500 | } | |
7501 | } | |
7502 | ||
7503 | search_tidyup(); | |
7504 | ||
7505 | return 0; | |
7506 | } | |
7507 | ||
7508 | #endif | |
7509 | ||
9e4dddbd | 7510 | /* vi: aw ai sw=2 |
b9c2e32f | 7511 | */ |
059ec3d9 | 7512 | /* End of expand.c */ |