Commit | Line | Data |
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059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
5a66c31b | 5 | /* Copyright (c) University of Cambridge 1995 - 2014 */ |
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 | ||
b0e85a8f | 16 | static uschar *expand_string_internal(uschar *, BOOL, uschar **, BOOL, BOOL, BOOL *); |
7685ce68 | 17 | static int_eximarith_t expanded_string_integer(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 | |
9d1c15ef JH |
97 | #ifndef nelements |
98 | # define nelements(arr) (sizeof(arr) / sizeof(*arr)) | |
99 | #endif | |
059ec3d9 PH |
100 | |
101 | /************************************************* | |
102 | * Local statics and tables * | |
103 | *************************************************/ | |
104 | ||
105 | /* Table of item names, and corresponding switch numbers. The names must be in | |
106 | alphabetical order. */ | |
107 | ||
108 | static uschar *item_table[] = { | |
723c72e6 | 109 | US"acl", |
9d1c15ef | 110 | US"certextract", |
1a46a8c5 | 111 | US"dlfunc", |
059ec3d9 | 112 | US"extract", |
29f89cad | 113 | US"filter", |
059ec3d9 PH |
114 | US"hash", |
115 | US"hmac", | |
116 | US"if", | |
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", | |
130 | US"substr", | |
131 | US"tr" }; | |
132 | ||
133 | enum { | |
723c72e6 | 134 | EITEM_ACL, |
9d1c15ef | 135 | EITEM_CERTEXTRACT, |
1a46a8c5 | 136 | EITEM_DLFUNC, |
059ec3d9 | 137 | EITEM_EXTRACT, |
29f89cad | 138 | EITEM_FILTER, |
059ec3d9 PH |
139 | EITEM_HASH, |
140 | EITEM_HMAC, | |
141 | EITEM_IF, | |
142 | EITEM_LENGTH, | |
aa26e137 | 143 | EITEM_LISTEXTRACT, |
059ec3d9 | 144 | EITEM_LOOKUP, |
29f89cad | 145 | EITEM_MAP, |
059ec3d9 | 146 | EITEM_NHASH, |
1a46a8c5 | 147 | EITEM_PERL, |
fffda43a TK |
148 | EITEM_PRVS, |
149 | EITEM_PRVSCHECK, | |
059ec3d9 PH |
150 | EITEM_READFILE, |
151 | EITEM_READSOCK, | |
29f89cad | 152 | EITEM_REDUCE, |
059ec3d9 PH |
153 | EITEM_RUN, |
154 | EITEM_SG, | |
155 | EITEM_SUBSTR, | |
156 | EITEM_TR }; | |
157 | ||
158 | /* Tables of operator names, and corresponding switch numbers. The names must be | |
159 | in alphabetical order. There are two tables, because underscore is used in some | |
160 | cases to introduce arguments, whereas for other it is part of the name. This is | |
161 | an historical mis-design. */ | |
162 | ||
163 | static uschar *op_table_underscore[] = { | |
164 | US"from_utf8", | |
165 | US"local_part", | |
166 | US"quote_local_part", | |
83e029d5 | 167 | US"reverse_ip", |
f90d018c | 168 | US"time_eval", |
059ec3d9 PH |
169 | US"time_interval"}; |
170 | ||
171 | enum { | |
172 | EOP_FROM_UTF8, | |
173 | EOP_LOCAL_PART, | |
174 | EOP_QUOTE_LOCAL_PART, | |
83e029d5 | 175 | EOP_REVERSE_IP, |
f90d018c | 176 | EOP_TIME_EVAL, |
059ec3d9 PH |
177 | EOP_TIME_INTERVAL }; |
178 | ||
179 | static uschar *op_table_main[] = { | |
180 | US"address", | |
29f89cad | 181 | US"addresses", |
059ec3d9 PH |
182 | US"base62", |
183 | US"base62d", | |
184 | US"domain", | |
185 | US"escape", | |
186 | US"eval", | |
187 | US"eval10", | |
188 | US"expand", | |
189 | US"h", | |
190 | US"hash", | |
191 | US"hex2b64", | |
c393f931 | 192 | US"hexquote", |
059ec3d9 PH |
193 | US"l", |
194 | US"lc", | |
195 | US"length", | |
a64a3dfa JH |
196 | US"listcount", |
197 | US"listnamed", | |
059ec3d9 PH |
198 | US"mask", |
199 | US"md5", | |
200 | US"nh", | |
201 | US"nhash", | |
202 | US"quote", | |
9e3331ea | 203 | US"randint", |
059ec3d9 | 204 | US"rfc2047", |
9c57cbc0 | 205 | US"rfc2047d", |
059ec3d9 PH |
206 | US"rxquote", |
207 | US"s", | |
208 | US"sha1", | |
9ef9101c | 209 | US"sha256", |
059ec3d9 PH |
210 | US"stat", |
211 | US"str2b64", | |
212 | US"strlen", | |
213 | US"substr", | |
b9c2e32f AR |
214 | US"uc", |
215 | US"utf8clean" }; | |
059ec3d9 PH |
216 | |
217 | enum { | |
218 | EOP_ADDRESS = sizeof(op_table_underscore)/sizeof(uschar *), | |
29f89cad | 219 | EOP_ADDRESSES, |
059ec3d9 PH |
220 | EOP_BASE62, |
221 | EOP_BASE62D, | |
222 | EOP_DOMAIN, | |
223 | EOP_ESCAPE, | |
224 | EOP_EVAL, | |
225 | EOP_EVAL10, | |
226 | EOP_EXPAND, | |
227 | EOP_H, | |
228 | EOP_HASH, | |
229 | EOP_HEX2B64, | |
c393f931 | 230 | EOP_HEXQUOTE, |
059ec3d9 PH |
231 | EOP_L, |
232 | EOP_LC, | |
233 | EOP_LENGTH, | |
a64a3dfa JH |
234 | EOP_LISTCOUNT, |
235 | EOP_LISTNAMED, | |
059ec3d9 PH |
236 | EOP_MASK, |
237 | EOP_MD5, | |
238 | EOP_NH, | |
239 | EOP_NHASH, | |
240 | EOP_QUOTE, | |
9e3331ea | 241 | EOP_RANDINT, |
059ec3d9 | 242 | EOP_RFC2047, |
9c57cbc0 | 243 | EOP_RFC2047D, |
059ec3d9 PH |
244 | EOP_RXQUOTE, |
245 | EOP_S, | |
246 | EOP_SHA1, | |
9ef9101c | 247 | EOP_SHA256, |
059ec3d9 PH |
248 | EOP_STAT, |
249 | EOP_STR2B64, | |
250 | EOP_STRLEN, | |
251 | EOP_SUBSTR, | |
b9c2e32f AR |
252 | EOP_UC, |
253 | EOP_UTF8CLEAN }; | |
059ec3d9 PH |
254 | |
255 | ||
256 | /* Table of condition names, and corresponding switch numbers. The names must | |
257 | be in alphabetical order. */ | |
258 | ||
259 | static uschar *cond_table[] = { | |
260 | US"<", | |
261 | US"<=", | |
262 | US"=", | |
263 | US"==", /* Backward compatibility */ | |
264 | US">", | |
265 | US">=", | |
333eea9c | 266 | US"acl", |
059ec3d9 | 267 | US"and", |
f3766eb5 | 268 | US"bool", |
6a8de854 | 269 | US"bool_lax", |
059ec3d9 PH |
270 | US"crypteq", |
271 | US"def", | |
272 | US"eq", | |
273 | US"eqi", | |
274 | US"exists", | |
275 | US"first_delivery", | |
0ce9abe6 PH |
276 | US"forall", |
277 | US"forany", | |
059ec3d9 PH |
278 | US"ge", |
279 | US"gei", | |
280 | US"gt", | |
281 | US"gti", | |
76dca828 PP |
282 | US"inlist", |
283 | US"inlisti", | |
059ec3d9 PH |
284 | US"isip", |
285 | US"isip4", | |
286 | US"isip6", | |
287 | US"ldapauth", | |
288 | US"le", | |
289 | US"lei", | |
290 | US"lt", | |
291 | US"lti", | |
292 | US"match", | |
293 | US"match_address", | |
294 | US"match_domain", | |
32d668a5 | 295 | US"match_ip", |
059ec3d9 PH |
296 | US"match_local_part", |
297 | US"or", | |
298 | US"pam", | |
299 | US"pwcheck", | |
300 | US"queue_running", | |
301 | US"radius", | |
302 | US"saslauthd" | |
303 | }; | |
304 | ||
305 | enum { | |
306 | ECOND_NUM_L, | |
307 | ECOND_NUM_LE, | |
308 | ECOND_NUM_E, | |
309 | ECOND_NUM_EE, | |
310 | ECOND_NUM_G, | |
311 | ECOND_NUM_GE, | |
333eea9c | 312 | ECOND_ACL, |
059ec3d9 | 313 | ECOND_AND, |
f3766eb5 | 314 | ECOND_BOOL, |
6a8de854 | 315 | ECOND_BOOL_LAX, |
059ec3d9 PH |
316 | ECOND_CRYPTEQ, |
317 | ECOND_DEF, | |
318 | ECOND_STR_EQ, | |
319 | ECOND_STR_EQI, | |
320 | ECOND_EXISTS, | |
321 | ECOND_FIRST_DELIVERY, | |
0ce9abe6 PH |
322 | ECOND_FORALL, |
323 | ECOND_FORANY, | |
059ec3d9 PH |
324 | ECOND_STR_GE, |
325 | ECOND_STR_GEI, | |
326 | ECOND_STR_GT, | |
327 | ECOND_STR_GTI, | |
76dca828 PP |
328 | ECOND_INLIST, |
329 | ECOND_INLISTI, | |
059ec3d9 PH |
330 | ECOND_ISIP, |
331 | ECOND_ISIP4, | |
332 | ECOND_ISIP6, | |
333 | ECOND_LDAPAUTH, | |
334 | ECOND_STR_LE, | |
335 | ECOND_STR_LEI, | |
336 | ECOND_STR_LT, | |
337 | ECOND_STR_LTI, | |
338 | ECOND_MATCH, | |
339 | ECOND_MATCH_ADDRESS, | |
340 | ECOND_MATCH_DOMAIN, | |
32d668a5 | 341 | ECOND_MATCH_IP, |
059ec3d9 PH |
342 | ECOND_MATCH_LOCAL_PART, |
343 | ECOND_OR, | |
344 | ECOND_PAM, | |
345 | ECOND_PWCHECK, | |
346 | ECOND_QUEUE_RUNNING, | |
347 | ECOND_RADIUS, | |
348 | ECOND_SASLAUTHD | |
349 | }; | |
350 | ||
351 | ||
059ec3d9 PH |
352 | /* Types of table entry */ |
353 | ||
7e75538e | 354 | enum vtypes { |
059ec3d9 PH |
355 | vtype_int, /* value is address of int */ |
356 | vtype_filter_int, /* ditto, but recognized only when filtering */ | |
357 | vtype_ino, /* value is address of ino_t (not always an int) */ | |
358 | vtype_uid, /* value is address of uid_t (not always an int) */ | |
359 | vtype_gid, /* value is address of gid_t (not always an int) */ | |
11d7e4fa | 360 | vtype_bool, /* value is address of bool */ |
059ec3d9 PH |
361 | vtype_stringptr, /* value is address of pointer to string */ |
362 | vtype_msgbody, /* as stringptr, but read when first required */ | |
363 | vtype_msgbody_end, /* ditto, the end of the message */ | |
ff75a1f7 PH |
364 | vtype_msgheaders, /* the message's headers, processed */ |
365 | vtype_msgheaders_raw, /* the message's headers, unprocessed */ | |
059ec3d9 PH |
366 | vtype_localpart, /* extract local part from string */ |
367 | vtype_domain, /* extract domain from string */ | |
362145b5 | 368 | vtype_string_func, /* value is string returned by given function */ |
059ec3d9 PH |
369 | vtype_todbsdin, /* value not used; generate BSD inbox tod */ |
370 | vtype_tode, /* value not used; generate tod in epoch format */ | |
f5787926 | 371 | vtype_todel, /* value not used; generate tod in epoch/usec format */ |
059ec3d9 PH |
372 | vtype_todf, /* value not used; generate full tod */ |
373 | vtype_todl, /* value not used; generate log tod */ | |
374 | vtype_todlf, /* value not used; generate log file datestamp tod */ | |
375 | vtype_todzone, /* value not used; generate time zone only */ | |
376 | vtype_todzulu, /* value not used; generate zulu tod */ | |
377 | vtype_reply, /* value not used; get reply from headers */ | |
378 | vtype_pid, /* value not used; result is pid */ | |
379 | vtype_host_lookup, /* value not used; get host name */ | |
5cb8cbc6 PH |
380 | vtype_load_avg, /* value not used; result is int from os_getloadavg */ |
381 | vtype_pspace, /* partition space; value is T/F for spool/log */ | |
9d1c15ef JH |
382 | vtype_pinodes, /* partition inodes; value is T/F for spool/log */ |
383 | vtype_cert /* SSL certificate */ | |
80a47a2c TK |
384 | #ifndef DISABLE_DKIM |
385 | ,vtype_dkim /* Lookup of value in DKIM signature */ | |
386 | #endif | |
7e75538e JH |
387 | }; |
388 | ||
389 | /* Type for main variable table */ | |
390 | ||
391 | typedef struct { | |
392 | const char *name; | |
393 | enum vtypes type; | |
394 | void *value; | |
395 | } var_entry; | |
396 | ||
397 | /* Type for entries pointing to address/length pairs. Not currently | |
398 | in use. */ | |
399 | ||
400 | typedef struct { | |
401 | uschar **address; | |
402 | int *length; | |
403 | } alblock; | |
059ec3d9 | 404 | |
362145b5 JH |
405 | static uschar * fn_recipients(void); |
406 | ||
059ec3d9 PH |
407 | /* This table must be kept in alphabetical order. */ |
408 | ||
409 | static var_entry var_table[] = { | |
38a0a95f PH |
410 | /* WARNING: Do not invent variables whose names start acl_c or acl_m because |
411 | they will be confused with user-creatable ACL variables. */ | |
525239c1 JH |
412 | { "acl_arg1", vtype_stringptr, &acl_arg[0] }, |
413 | { "acl_arg2", vtype_stringptr, &acl_arg[1] }, | |
414 | { "acl_arg3", vtype_stringptr, &acl_arg[2] }, | |
415 | { "acl_arg4", vtype_stringptr, &acl_arg[3] }, | |
416 | { "acl_arg5", vtype_stringptr, &acl_arg[4] }, | |
417 | { "acl_arg6", vtype_stringptr, &acl_arg[5] }, | |
418 | { "acl_arg7", vtype_stringptr, &acl_arg[6] }, | |
419 | { "acl_arg8", vtype_stringptr, &acl_arg[7] }, | |
420 | { "acl_arg9", vtype_stringptr, &acl_arg[8] }, | |
421 | { "acl_narg", vtype_int, &acl_narg }, | |
059ec3d9 PH |
422 | { "acl_verify_message", vtype_stringptr, &acl_verify_message }, |
423 | { "address_data", vtype_stringptr, &deliver_address_data }, | |
424 | { "address_file", vtype_stringptr, &address_file }, | |
425 | { "address_pipe", vtype_stringptr, &address_pipe }, | |
2d07a215 | 426 | { "authenticated_fail_id",vtype_stringptr, &authenticated_fail_id }, |
059ec3d9 PH |
427 | { "authenticated_id", vtype_stringptr, &authenticated_id }, |
428 | { "authenticated_sender",vtype_stringptr, &authenticated_sender }, | |
429 | { "authentication_failed",vtype_int, &authentication_failed }, | |
9e949f00 PP |
430 | #ifdef WITH_CONTENT_SCAN |
431 | { "av_failed", vtype_int, &av_failed }, | |
432 | #endif | |
8523533c TK |
433 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
434 | { "bmi_alt_location", vtype_stringptr, &bmi_alt_location }, | |
435 | { "bmi_base64_tracker_verdict", vtype_stringptr, &bmi_base64_tracker_verdict }, | |
436 | { "bmi_base64_verdict", vtype_stringptr, &bmi_base64_verdict }, | |
437 | { "bmi_deliver", vtype_int, &bmi_deliver }, | |
438 | #endif | |
059ec3d9 PH |
439 | { "body_linecount", vtype_int, &body_linecount }, |
440 | { "body_zerocount", vtype_int, &body_zerocount }, | |
441 | { "bounce_recipient", vtype_stringptr, &bounce_recipient }, | |
442 | { "bounce_return_size_limit", vtype_int, &bounce_return_size_limit }, | |
443 | { "caller_gid", vtype_gid, &real_gid }, | |
444 | { "caller_uid", vtype_uid, &real_uid }, | |
445 | { "compile_date", vtype_stringptr, &version_date }, | |
446 | { "compile_number", vtype_stringptr, &version_cnumber }, | |
e5a9dba6 | 447 | { "csa_status", vtype_stringptr, &csa_status }, |
6a8f9482 TK |
448 | #ifdef EXPERIMENTAL_DCC |
449 | { "dcc_header", vtype_stringptr, &dcc_header }, | |
450 | { "dcc_result", vtype_stringptr, &dcc_result }, | |
451 | #endif | |
8523533c TK |
452 | #ifdef WITH_OLD_DEMIME |
453 | { "demime_errorlevel", vtype_int, &demime_errorlevel }, | |
454 | { "demime_reason", vtype_stringptr, &demime_reason }, | |
fb2274d4 | 455 | #endif |
80a47a2c TK |
456 | #ifndef DISABLE_DKIM |
457 | { "dkim_algo", vtype_dkim, (void *)DKIM_ALGO }, | |
458 | { "dkim_bodylength", vtype_dkim, (void *)DKIM_BODYLENGTH }, | |
459 | { "dkim_canon_body", vtype_dkim, (void *)DKIM_CANON_BODY }, | |
460 | { "dkim_canon_headers", vtype_dkim, (void *)DKIM_CANON_HEADERS }, | |
461 | { "dkim_copiedheaders", vtype_dkim, (void *)DKIM_COPIEDHEADERS }, | |
462 | { "dkim_created", vtype_dkim, (void *)DKIM_CREATED }, | |
2df588c9 | 463 | { "dkim_cur_signer", vtype_stringptr, &dkim_cur_signer }, |
e08d09e5 | 464 | { "dkim_domain", vtype_stringptr, &dkim_signing_domain }, |
80a47a2c TK |
465 | { "dkim_expires", vtype_dkim, (void *)DKIM_EXPIRES }, |
466 | { "dkim_headernames", vtype_dkim, (void *)DKIM_HEADERNAMES }, | |
467 | { "dkim_identity", vtype_dkim, (void *)DKIM_IDENTITY }, | |
468 | { "dkim_key_granularity",vtype_dkim, (void *)DKIM_KEY_GRANULARITY }, | |
469 | { "dkim_key_nosubdomains",vtype_dkim, (void *)DKIM_NOSUBDOMAINS }, | |
470 | { "dkim_key_notes", vtype_dkim, (void *)DKIM_KEY_NOTES }, | |
471 | { "dkim_key_srvtype", vtype_dkim, (void *)DKIM_KEY_SRVTYPE }, | |
472 | { "dkim_key_testing", vtype_dkim, (void *)DKIM_KEY_TESTING }, | |
e08d09e5 | 473 | { "dkim_selector", vtype_stringptr, &dkim_signing_selector }, |
9e5d6b55 | 474 | { "dkim_signers", vtype_stringptr, &dkim_signers }, |
80a47a2c TK |
475 | { "dkim_verify_reason", vtype_dkim, (void *)DKIM_VERIFY_REASON }, |
476 | { "dkim_verify_status", vtype_dkim, (void *)DKIM_VERIFY_STATUS}, | |
4840604e TL |
477 | #endif |
478 | #ifdef EXPERIMENTAL_DMARC | |
479 | { "dmarc_ar_header", vtype_stringptr, &dmarc_ar_header }, | |
8c8b8274 | 480 | { "dmarc_domain_policy", vtype_stringptr, &dmarc_domain_policy }, |
4840604e TL |
481 | { "dmarc_status", vtype_stringptr, &dmarc_status }, |
482 | { "dmarc_status_text", vtype_stringptr, &dmarc_status_text }, | |
483 | { "dmarc_used_domain", vtype_stringptr, &dmarc_used_domain }, | |
8523533c | 484 | #endif |
059ec3d9 | 485 | { "dnslist_domain", vtype_stringptr, &dnslist_domain }, |
93655c46 | 486 | { "dnslist_matched", vtype_stringptr, &dnslist_matched }, |
059ec3d9 PH |
487 | { "dnslist_text", vtype_stringptr, &dnslist_text }, |
488 | { "dnslist_value", vtype_stringptr, &dnslist_value }, | |
489 | { "domain", vtype_stringptr, &deliver_domain }, | |
490 | { "domain_data", vtype_stringptr, &deliver_domain_data }, | |
491 | { "exim_gid", vtype_gid, &exim_gid }, | |
492 | { "exim_path", vtype_stringptr, &exim_path }, | |
493 | { "exim_uid", vtype_uid, &exim_uid }, | |
8523533c TK |
494 | #ifdef WITH_OLD_DEMIME |
495 | { "found_extension", vtype_stringptr, &found_extension }, | |
8e669ac1 | 496 | #endif |
362145b5 | 497 | { "headers_added", vtype_string_func, &fn_hdrs_added }, |
059ec3d9 PH |
498 | { "home", vtype_stringptr, &deliver_home }, |
499 | { "host", vtype_stringptr, &deliver_host }, | |
500 | { "host_address", vtype_stringptr, &deliver_host_address }, | |
501 | { "host_data", vtype_stringptr, &host_data }, | |
b08b24c8 | 502 | { "host_lookup_deferred",vtype_int, &host_lookup_deferred }, |
059ec3d9 PH |
503 | { "host_lookup_failed", vtype_int, &host_lookup_failed }, |
504 | { "inode", vtype_ino, &deliver_inode }, | |
505 | { "interface_address", vtype_stringptr, &interface_address }, | |
506 | { "interface_port", vtype_int, &interface_port }, | |
0ce9abe6 | 507 | { "item", vtype_stringptr, &iterate_item }, |
059ec3d9 PH |
508 | #ifdef LOOKUP_LDAP |
509 | { "ldap_dn", vtype_stringptr, &eldap_dn }, | |
510 | #endif | |
511 | { "load_average", vtype_load_avg, NULL }, | |
512 | { "local_part", vtype_stringptr, &deliver_localpart }, | |
513 | { "local_part_data", vtype_stringptr, &deliver_localpart_data }, | |
514 | { "local_part_prefix", vtype_stringptr, &deliver_localpart_prefix }, | |
515 | { "local_part_suffix", vtype_stringptr, &deliver_localpart_suffix }, | |
516 | { "local_scan_data", vtype_stringptr, &local_scan_data }, | |
517 | { "local_user_gid", vtype_gid, &local_user_gid }, | |
518 | { "local_user_uid", vtype_uid, &local_user_uid }, | |
519 | { "localhost_number", vtype_int, &host_number }, | |
5cb8cbc6 | 520 | { "log_inodes", vtype_pinodes, (void *)FALSE }, |
8e669ac1 | 521 | { "log_space", vtype_pspace, (void *)FALSE }, |
4e0983dc | 522 | { "lookup_dnssec_authenticated",vtype_stringptr,&lookup_dnssec_authenticated}, |
059ec3d9 | 523 | { "mailstore_basename", vtype_stringptr, &mailstore_basename }, |
8523533c TK |
524 | #ifdef WITH_CONTENT_SCAN |
525 | { "malware_name", vtype_stringptr, &malware_name }, | |
526 | #endif | |
d677b2f2 | 527 | { "max_received_linelength", vtype_int, &max_received_linelength }, |
059ec3d9 PH |
528 | { "message_age", vtype_int, &message_age }, |
529 | { "message_body", vtype_msgbody, &message_body }, | |
530 | { "message_body_end", vtype_msgbody_end, &message_body_end }, | |
531 | { "message_body_size", vtype_int, &message_body_size }, | |
1ab52c69 | 532 | { "message_exim_id", vtype_stringptr, &message_id }, |
059ec3d9 | 533 | { "message_headers", vtype_msgheaders, NULL }, |
ff75a1f7 | 534 | { "message_headers_raw", vtype_msgheaders_raw, NULL }, |
059ec3d9 | 535 | { "message_id", vtype_stringptr, &message_id }, |
2e0c1448 | 536 | { "message_linecount", vtype_int, &message_linecount }, |
059ec3d9 | 537 | { "message_size", vtype_int, &message_size }, |
8523533c TK |
538 | #ifdef WITH_CONTENT_SCAN |
539 | { "mime_anomaly_level", vtype_int, &mime_anomaly_level }, | |
540 | { "mime_anomaly_text", vtype_stringptr, &mime_anomaly_text }, | |
541 | { "mime_boundary", vtype_stringptr, &mime_boundary }, | |
542 | { "mime_charset", vtype_stringptr, &mime_charset }, | |
543 | { "mime_content_description", vtype_stringptr, &mime_content_description }, | |
544 | { "mime_content_disposition", vtype_stringptr, &mime_content_disposition }, | |
545 | { "mime_content_id", vtype_stringptr, &mime_content_id }, | |
546 | { "mime_content_size", vtype_int, &mime_content_size }, | |
547 | { "mime_content_transfer_encoding",vtype_stringptr, &mime_content_transfer_encoding }, | |
548 | { "mime_content_type", vtype_stringptr, &mime_content_type }, | |
549 | { "mime_decoded_filename", vtype_stringptr, &mime_decoded_filename }, | |
550 | { "mime_filename", vtype_stringptr, &mime_filename }, | |
551 | { "mime_is_coverletter", vtype_int, &mime_is_coverletter }, | |
552 | { "mime_is_multipart", vtype_int, &mime_is_multipart }, | |
553 | { "mime_is_rfc822", vtype_int, &mime_is_rfc822 }, | |
554 | { "mime_part_count", vtype_int, &mime_part_count }, | |
555 | #endif | |
059ec3d9 PH |
556 | { "n0", vtype_filter_int, &filter_n[0] }, |
557 | { "n1", vtype_filter_int, &filter_n[1] }, | |
558 | { "n2", vtype_filter_int, &filter_n[2] }, | |
559 | { "n3", vtype_filter_int, &filter_n[3] }, | |
560 | { "n4", vtype_filter_int, &filter_n[4] }, | |
561 | { "n5", vtype_filter_int, &filter_n[5] }, | |
562 | { "n6", vtype_filter_int, &filter_n[6] }, | |
563 | { "n7", vtype_filter_int, &filter_n[7] }, | |
564 | { "n8", vtype_filter_int, &filter_n[8] }, | |
565 | { "n9", vtype_filter_int, &filter_n[9] }, | |
566 | { "original_domain", vtype_stringptr, &deliver_domain_orig }, | |
567 | { "original_local_part", vtype_stringptr, &deliver_localpart_orig }, | |
568 | { "originator_gid", vtype_gid, &originator_gid }, | |
569 | { "originator_uid", vtype_uid, &originator_uid }, | |
570 | { "parent_domain", vtype_stringptr, &deliver_domain_parent }, | |
571 | { "parent_local_part", vtype_stringptr, &deliver_localpart_parent }, | |
572 | { "pid", vtype_pid, NULL }, | |
573 | { "primary_hostname", vtype_stringptr, &primary_hostname }, | |
a3c86431 | 574 | #ifdef EXPERIMENTAL_PROXY |
a3bddaa8 TL |
575 | { "proxy_host_address", vtype_stringptr, &proxy_host_address }, |
576 | { "proxy_host_port", vtype_int, &proxy_host_port }, | |
a3c86431 | 577 | { "proxy_session", vtype_bool, &proxy_session }, |
eb57651e TL |
578 | { "proxy_target_address",vtype_stringptr, &proxy_target_address }, |
579 | { "proxy_target_port", vtype_int, &proxy_target_port }, | |
a3c86431 | 580 | #endif |
fffda43a TK |
581 | { "prvscheck_address", vtype_stringptr, &prvscheck_address }, |
582 | { "prvscheck_keynum", vtype_stringptr, &prvscheck_keynum }, | |
583 | { "prvscheck_result", vtype_stringptr, &prvscheck_result }, | |
059ec3d9 PH |
584 | { "qualify_domain", vtype_stringptr, &qualify_domain_sender }, |
585 | { "qualify_recipient", vtype_stringptr, &qualify_domain_recipient }, | |
586 | { "rcpt_count", vtype_int, &rcpt_count }, | |
587 | { "rcpt_defer_count", vtype_int, &rcpt_defer_count }, | |
588 | { "rcpt_fail_count", vtype_int, &rcpt_fail_count }, | |
589 | { "received_count", vtype_int, &received_count }, | |
590 | { "received_for", vtype_stringptr, &received_for }, | |
194cc0e4 PH |
591 | { "received_ip_address", vtype_stringptr, &interface_address }, |
592 | { "received_port", vtype_int, &interface_port }, | |
059ec3d9 | 593 | { "received_protocol", vtype_stringptr, &received_protocol }, |
7dbf77c9 | 594 | { "received_time", vtype_int, &received_time }, |
059ec3d9 | 595 | { "recipient_data", vtype_stringptr, &recipient_data }, |
8e669ac1 | 596 | { "recipient_verify_failure",vtype_stringptr,&recipient_verify_failure }, |
362145b5 | 597 | { "recipients", vtype_string_func, &fn_recipients }, |
059ec3d9 | 598 | { "recipients_count", vtype_int, &recipients_count }, |
8523533c TK |
599 | #ifdef WITH_CONTENT_SCAN |
600 | { "regex_match_string", vtype_stringptr, ®ex_match_string }, | |
601 | #endif | |
059ec3d9 PH |
602 | { "reply_address", vtype_reply, NULL }, |
603 | { "return_path", vtype_stringptr, &return_path }, | |
604 | { "return_size_limit", vtype_int, &bounce_return_size_limit }, | |
181d9bf8 | 605 | { "router_name", vtype_stringptr, &router_name }, |
059ec3d9 PH |
606 | { "runrc", vtype_int, &runrc }, |
607 | { "self_hostname", vtype_stringptr, &self_hostname }, | |
608 | { "sender_address", vtype_stringptr, &sender_address }, | |
2a3eea10 | 609 | { "sender_address_data", vtype_stringptr, &sender_address_data }, |
059ec3d9 PH |
610 | { "sender_address_domain", vtype_domain, &sender_address }, |
611 | { "sender_address_local_part", vtype_localpart, &sender_address }, | |
612 | { "sender_data", vtype_stringptr, &sender_data }, | |
613 | { "sender_fullhost", vtype_stringptr, &sender_fullhost }, | |
614 | { "sender_helo_name", vtype_stringptr, &sender_helo_name }, | |
615 | { "sender_host_address", vtype_stringptr, &sender_host_address }, | |
616 | { "sender_host_authenticated",vtype_stringptr, &sender_host_authenticated }, | |
11d7e4fa | 617 | { "sender_host_dnssec", vtype_bool, &sender_host_dnssec }, |
059ec3d9 PH |
618 | { "sender_host_name", vtype_host_lookup, NULL }, |
619 | { "sender_host_port", vtype_int, &sender_host_port }, | |
620 | { "sender_ident", vtype_stringptr, &sender_ident }, | |
870f6ba8 TF |
621 | { "sender_rate", vtype_stringptr, &sender_rate }, |
622 | { "sender_rate_limit", vtype_stringptr, &sender_rate_limit }, | |
623 | { "sender_rate_period", vtype_stringptr, &sender_rate_period }, | |
059ec3d9 | 624 | { "sender_rcvhost", vtype_stringptr, &sender_rcvhost }, |
8e669ac1 | 625 | { "sender_verify_failure",vtype_stringptr, &sender_verify_failure }, |
41c7c167 PH |
626 | { "sending_ip_address", vtype_stringptr, &sending_ip_address }, |
627 | { "sending_port", vtype_int, &sending_port }, | |
8e669ac1 | 628 | { "smtp_active_hostname", vtype_stringptr, &smtp_active_hostname }, |
3ee512ff PH |
629 | { "smtp_command", vtype_stringptr, &smtp_cmd_buffer }, |
630 | { "smtp_command_argument", vtype_stringptr, &smtp_cmd_argument }, | |
b01dd148 | 631 | { "smtp_count_at_connection_start", vtype_int, &smtp_accept_count }, |
8f128379 | 632 | { "smtp_notquit_reason", vtype_stringptr, &smtp_notquit_reason }, |
059ec3d9 PH |
633 | { "sn0", vtype_filter_int, &filter_sn[0] }, |
634 | { "sn1", vtype_filter_int, &filter_sn[1] }, | |
635 | { "sn2", vtype_filter_int, &filter_sn[2] }, | |
636 | { "sn3", vtype_filter_int, &filter_sn[3] }, | |
637 | { "sn4", vtype_filter_int, &filter_sn[4] }, | |
638 | { "sn5", vtype_filter_int, &filter_sn[5] }, | |
639 | { "sn6", vtype_filter_int, &filter_sn[6] }, | |
640 | { "sn7", vtype_filter_int, &filter_sn[7] }, | |
641 | { "sn8", vtype_filter_int, &filter_sn[8] }, | |
642 | { "sn9", vtype_filter_int, &filter_sn[9] }, | |
8523533c TK |
643 | #ifdef WITH_CONTENT_SCAN |
644 | { "spam_bar", vtype_stringptr, &spam_bar }, | |
645 | { "spam_report", vtype_stringptr, &spam_report }, | |
646 | { "spam_score", vtype_stringptr, &spam_score }, | |
647 | { "spam_score_int", vtype_stringptr, &spam_score_int }, | |
648 | #endif | |
649 | #ifdef EXPERIMENTAL_SPF | |
65a7d8c3 | 650 | { "spf_guess", vtype_stringptr, &spf_guess }, |
8523533c TK |
651 | { "spf_header_comment", vtype_stringptr, &spf_header_comment }, |
652 | { "spf_received", vtype_stringptr, &spf_received }, | |
653 | { "spf_result", vtype_stringptr, &spf_result }, | |
654 | { "spf_smtp_comment", vtype_stringptr, &spf_smtp_comment }, | |
655 | #endif | |
059ec3d9 | 656 | { "spool_directory", vtype_stringptr, &spool_directory }, |
5cb8cbc6 | 657 | { "spool_inodes", vtype_pinodes, (void *)TRUE }, |
8e669ac1 | 658 | { "spool_space", vtype_pspace, (void *)TRUE }, |
8523533c TK |
659 | #ifdef EXPERIMENTAL_SRS |
660 | { "srs_db_address", vtype_stringptr, &srs_db_address }, | |
661 | { "srs_db_key", vtype_stringptr, &srs_db_key }, | |
662 | { "srs_orig_recipient", vtype_stringptr, &srs_orig_recipient }, | |
663 | { "srs_orig_sender", vtype_stringptr, &srs_orig_sender }, | |
664 | { "srs_recipient", vtype_stringptr, &srs_recipient }, | |
665 | { "srs_status", vtype_stringptr, &srs_status }, | |
666 | #endif | |
059ec3d9 | 667 | { "thisaddress", vtype_stringptr, &filter_thisaddress }, |
817d9f57 | 668 | |
d9b2312b | 669 | /* The non-(in,out) variables are now deprecated */ |
817d9f57 JH |
670 | { "tls_bits", vtype_int, &tls_in.bits }, |
671 | { "tls_certificate_verified", vtype_int, &tls_in.certificate_verified }, | |
672 | { "tls_cipher", vtype_stringptr, &tls_in.cipher }, | |
d9b2312b JH |
673 | |
674 | { "tls_in_bits", vtype_int, &tls_in.bits }, | |
675 | { "tls_in_certificate_verified", vtype_int, &tls_in.certificate_verified }, | |
676 | { "tls_in_cipher", vtype_stringptr, &tls_in.cipher }, | |
44662487 | 677 | { "tls_in_ocsp", vtype_int, &tls_in.ocsp }, |
9d1c15ef JH |
678 | { "tls_in_ourcert", vtype_cert, &tls_in.ourcert }, |
679 | { "tls_in_peercert", vtype_cert, &tls_in.peercert }, | |
d9b2312b | 680 | { "tls_in_peerdn", vtype_stringptr, &tls_in.peerdn }, |
4b57b15d | 681 | #if defined(SUPPORT_TLS) |
d9b2312b JH |
682 | { "tls_in_sni", vtype_stringptr, &tls_in.sni }, |
683 | #endif | |
817d9f57 | 684 | { "tls_out_bits", vtype_int, &tls_out.bits }, |
cb9d95ae | 685 | { "tls_out_certificate_verified", vtype_int,&tls_out.certificate_verified }, |
817d9f57 | 686 | { "tls_out_cipher", vtype_stringptr, &tls_out.cipher }, |
44662487 | 687 | { "tls_out_ocsp", vtype_int, &tls_out.ocsp }, |
9d1c15ef JH |
688 | { "tls_out_ourcert", vtype_cert, &tls_out.ourcert }, |
689 | { "tls_out_peercert", vtype_cert, &tls_out.peercert }, | |
817d9f57 | 690 | { "tls_out_peerdn", vtype_stringptr, &tls_out.peerdn }, |
4b57b15d | 691 | #if defined(SUPPORT_TLS) |
817d9f57 | 692 | { "tls_out_sni", vtype_stringptr, &tls_out.sni }, |
7be682ca | 693 | #endif |
d9b2312b | 694 | |
613dd4ae | 695 | { "tls_peerdn", vtype_stringptr, &tls_in.peerdn }, /* mind the alphabetical order! */ |
4b57b15d | 696 | #if defined(SUPPORT_TLS) |
613dd4ae JH |
697 | { "tls_sni", vtype_stringptr, &tls_in.sni }, /* mind the alphabetical order! */ |
698 | #endif | |
817d9f57 | 699 | |
059ec3d9 PH |
700 | { "tod_bsdinbox", vtype_todbsdin, NULL }, |
701 | { "tod_epoch", vtype_tode, NULL }, | |
f5787926 | 702 | { "tod_epoch_l", vtype_todel, NULL }, |
059ec3d9 PH |
703 | { "tod_full", vtype_todf, NULL }, |
704 | { "tod_log", vtype_todl, NULL }, | |
705 | { "tod_logfile", vtype_todlf, NULL }, | |
706 | { "tod_zone", vtype_todzone, NULL }, | |
707 | { "tod_zulu", vtype_todzulu, NULL }, | |
d68218c7 JH |
708 | #ifdef EXPERIMENTAL_TPDA |
709 | { "tpda_defer_errno", vtype_int, &tpda_defer_errno }, | |
710 | { "tpda_defer_errstr", vtype_stringptr, &tpda_defer_errstr }, | |
711 | { "tpda_delivery_confirmation", vtype_stringptr, &tpda_delivery_confirmation }, | |
712 | { "tpda_delivery_domain", vtype_stringptr, &tpda_delivery_domain }, | |
713 | { "tpda_delivery_fqdn", vtype_stringptr, &tpda_delivery_fqdn }, | |
714 | { "tpda_delivery_ip", vtype_stringptr, &tpda_delivery_ip }, | |
715 | { "tpda_delivery_local_part",vtype_stringptr,&tpda_delivery_local_part }, | |
716 | { "tpda_delivery_port", vtype_int, &tpda_delivery_port }, | |
717 | #endif | |
181d9bf8 | 718 | { "transport_name", vtype_stringptr, &transport_name }, |
059ec3d9 PH |
719 | { "value", vtype_stringptr, &lookup_value }, |
720 | { "version_number", vtype_stringptr, &version_string }, | |
721 | { "warn_message_delay", vtype_stringptr, &warnmsg_delay }, | |
722 | { "warn_message_recipient",vtype_stringptr, &warnmsg_recipients }, | |
723 | { "warn_message_recipients",vtype_stringptr,&warnmsg_recipients }, | |
724 | { "warnmsg_delay", vtype_stringptr, &warnmsg_delay }, | |
725 | { "warnmsg_recipient", vtype_stringptr, &warnmsg_recipients }, | |
726 | { "warnmsg_recipients", vtype_stringptr, &warnmsg_recipients } | |
727 | }; | |
728 | ||
729 | static int var_table_size = sizeof(var_table)/sizeof(var_entry); | |
730 | static uschar var_buffer[256]; | |
731 | static BOOL malformed_header; | |
732 | ||
733 | /* For textual hashes */ | |
734 | ||
1ba28e2b PP |
735 | static const char *hashcodes = "abcdefghijklmnopqrtsuvwxyz" |
736 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
737 | "0123456789"; | |
059ec3d9 PH |
738 | |
739 | enum { HMAC_MD5, HMAC_SHA1 }; | |
740 | ||
741 | /* For numeric hashes */ | |
742 | ||
743 | static unsigned int prime[] = { | |
744 | 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, | |
745 | 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, | |
746 | 73, 79, 83, 89, 97, 101, 103, 107, 109, 113}; | |
747 | ||
748 | /* For printing modes in symbolic form */ | |
749 | ||
750 | static uschar *mtable_normal[] = | |
751 | { US"---", US"--x", US"-w-", US"-wx", US"r--", US"r-x", US"rw-", US"rwx" }; | |
752 | ||
753 | static uschar *mtable_setid[] = | |
754 | { US"--S", US"--s", US"-wS", US"-ws", US"r-S", US"r-s", US"rwS", US"rws" }; | |
755 | ||
756 | static uschar *mtable_sticky[] = | |
757 | { US"--T", US"--t", US"-wT", US"-wt", US"r-T", US"r-t", US"rwT", US"rwt" }; | |
758 | ||
759 | ||
760 | ||
761 | /************************************************* | |
762 | * Tables for UTF-8 support * | |
763 | *************************************************/ | |
764 | ||
765 | /* Table of the number of extra characters, indexed by the first character | |
766 | masked with 0x3f. The highest number for a valid UTF-8 character is in fact | |
767 | 0x3d. */ | |
768 | ||
769 | static uschar utf8_table1[] = { | |
770 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
771 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
772 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, | |
773 | 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5 }; | |
774 | ||
775 | /* These are the masks for the data bits in the first byte of a character, | |
776 | indexed by the number of additional bytes. */ | |
777 | ||
778 | static int utf8_table2[] = { 0xff, 0x1f, 0x0f, 0x07, 0x03, 0x01}; | |
779 | ||
780 | /* Get the next UTF-8 character, advancing the pointer. */ | |
781 | ||
782 | #define GETUTF8INC(c, ptr) \ | |
783 | c = *ptr++; \ | |
784 | if ((c & 0xc0) == 0xc0) \ | |
785 | { \ | |
786 | int a = utf8_table1[c & 0x3f]; /* Number of additional bytes */ \ | |
787 | int s = 6*a; \ | |
788 | c = (c & utf8_table2[a]) << s; \ | |
789 | while (a-- > 0) \ | |
790 | { \ | |
791 | s -= 6; \ | |
792 | c |= (*ptr++ & 0x3f) << s; \ | |
793 | } \ | |
794 | } | |
795 | ||
796 | ||
797 | /************************************************* | |
798 | * Binary chop search on a table * | |
799 | *************************************************/ | |
800 | ||
801 | /* This is used for matching expansion items and operators. | |
802 | ||
803 | Arguments: | |
804 | name the name that is being sought | |
805 | table the table to search | |
806 | table_size the number of items in the table | |
807 | ||
808 | Returns: the offset in the table, or -1 | |
809 | */ | |
810 | ||
811 | static int | |
812 | chop_match(uschar *name, uschar **table, int table_size) | |
813 | { | |
814 | uschar **bot = table; | |
815 | uschar **top = table + table_size; | |
816 | ||
817 | while (top > bot) | |
818 | { | |
819 | uschar **mid = bot + (top - bot)/2; | |
820 | int c = Ustrcmp(name, *mid); | |
821 | if (c == 0) return mid - table; | |
822 | if (c > 0) bot = mid + 1; else top = mid; | |
823 | } | |
824 | ||
825 | return -1; | |
826 | } | |
827 | ||
828 | ||
829 | ||
830 | /************************************************* | |
831 | * Check a condition string * | |
832 | *************************************************/ | |
833 | ||
834 | /* This function is called to expand a string, and test the result for a "true" | |
835 | or "false" value. Failure of the expansion yields FALSE; logged unless it was a | |
be7a5781 JH |
836 | forced fail or lookup defer. |
837 | ||
838 | We used to release all store used, but this is not not safe due | |
839 | to ${dlfunc } and ${acl }. In any case expand_string_internal() | |
840 | is reasonably careful to release what it can. | |
059ec3d9 | 841 | |
6a8de854 PP |
842 | The actual false-value tests should be replicated for ECOND_BOOL_LAX. |
843 | ||
059ec3d9 PH |
844 | Arguments: |
845 | condition the condition string | |
846 | m1 text to be incorporated in panic error | |
847 | m2 ditto | |
848 | ||
849 | Returns: TRUE if condition is met, FALSE if not | |
850 | */ | |
851 | ||
852 | BOOL | |
853 | expand_check_condition(uschar *condition, uschar *m1, uschar *m2) | |
854 | { | |
855 | int rc; | |
059ec3d9 PH |
856 | uschar *ss = expand_string(condition); |
857 | if (ss == NULL) | |
858 | { | |
859 | if (!expand_string_forcedfail && !search_find_defer) | |
860 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand condition \"%s\" " | |
861 | "for %s %s: %s", condition, m1, m2, expand_string_message); | |
862 | return FALSE; | |
863 | } | |
864 | rc = ss[0] != 0 && Ustrcmp(ss, "0") != 0 && strcmpic(ss, US"no") != 0 && | |
865 | strcmpic(ss, US"false") != 0; | |
059ec3d9 PH |
866 | return rc; |
867 | } | |
868 | ||
869 | ||
870 | ||
17c76198 | 871 | |
9e3331ea TK |
872 | /************************************************* |
873 | * Pseudo-random number generation * | |
874 | *************************************************/ | |
875 | ||
876 | /* Pseudo-random number generation. The result is not "expected" to be | |
877 | cryptographically strong but not so weak that someone will shoot themselves | |
878 | in the foot using it as a nonce in some email header scheme or whatever | |
879 | weirdness they'll twist this into. The result should ideally handle fork(). | |
880 | ||
881 | However, if we're stuck unable to provide this, then we'll fall back to | |
882 | appallingly bad randomness. | |
883 | ||
17c76198 PP |
884 | If SUPPORT_TLS is defined then this will not be used except as an emergency |
885 | fallback. | |
9e3331ea TK |
886 | |
887 | Arguments: | |
888 | max range maximum | |
889 | Returns a random number in range [0, max-1] | |
890 | */ | |
891 | ||
17c76198 PP |
892 | #ifdef SUPPORT_TLS |
893 | # define vaguely_random_number vaguely_random_number_fallback | |
894 | #endif | |
9e3331ea | 895 | int |
17c76198 | 896 | vaguely_random_number(int max) |
9e3331ea | 897 | { |
17c76198 PP |
898 | #ifdef SUPPORT_TLS |
899 | # undef vaguely_random_number | |
900 | #endif | |
9e3331ea TK |
901 | static pid_t pid = 0; |
902 | pid_t p2; | |
903 | #if defined(HAVE_SRANDOM) && !defined(HAVE_SRANDOMDEV) | |
904 | struct timeval tv; | |
905 | #endif | |
906 | ||
907 | p2 = getpid(); | |
908 | if (p2 != pid) | |
909 | { | |
910 | if (pid != 0) | |
911 | { | |
912 | ||
913 | #ifdef HAVE_ARC4RANDOM | |
914 | /* cryptographically strong randomness, common on *BSD platforms, not | |
915 | so much elsewhere. Alas. */ | |
916 | arc4random_stir(); | |
917 | #elif defined(HAVE_SRANDOM) || defined(HAVE_SRANDOMDEV) | |
918 | #ifdef HAVE_SRANDOMDEV | |
919 | /* uses random(4) for seeding */ | |
920 | srandomdev(); | |
921 | #else | |
922 | gettimeofday(&tv, NULL); | |
923 | srandom(tv.tv_sec | tv.tv_usec | getpid()); | |
924 | #endif | |
925 | #else | |
926 | /* Poor randomness and no seeding here */ | |
927 | #endif | |
928 | ||
929 | } | |
930 | pid = p2; | |
931 | } | |
932 | ||
933 | #ifdef HAVE_ARC4RANDOM | |
934 | return arc4random() % max; | |
935 | #elif defined(HAVE_SRANDOM) || defined(HAVE_SRANDOMDEV) | |
936 | return random() % max; | |
937 | #else | |
938 | /* This one returns a 16-bit number, definitely not crypto-strong */ | |
939 | return random_number(max); | |
940 | #endif | |
941 | } | |
942 | ||
17c76198 PP |
943 | |
944 | ||
9e3331ea | 945 | |
059ec3d9 PH |
946 | /************************************************* |
947 | * Pick out a name from a string * | |
948 | *************************************************/ | |
949 | ||
950 | /* If the name is too long, it is silently truncated. | |
951 | ||
952 | Arguments: | |
953 | name points to a buffer into which to put the name | |
954 | max is the length of the buffer | |
955 | s points to the first alphabetic character of the name | |
956 | extras chars other than alphanumerics to permit | |
957 | ||
958 | Returns: pointer to the first character after the name | |
959 | ||
960 | Note: The test for *s != 0 in the while loop is necessary because | |
961 | Ustrchr() yields non-NULL if the character is zero (which is not something | |
962 | I expected). */ | |
963 | ||
964 | static uschar * | |
965 | read_name(uschar *name, int max, uschar *s, uschar *extras) | |
966 | { | |
967 | int ptr = 0; | |
968 | while (*s != 0 && (isalnum(*s) || Ustrchr(extras, *s) != NULL)) | |
969 | { | |
970 | if (ptr < max-1) name[ptr++] = *s; | |
971 | s++; | |
972 | } | |
973 | name[ptr] = 0; | |
974 | return s; | |
975 | } | |
976 | ||
977 | ||
978 | ||
979 | /************************************************* | |
980 | * Pick out the rest of a header name * | |
981 | *************************************************/ | |
982 | ||
983 | /* A variable name starting $header_ (or just $h_ for those who like | |
984 | abbreviations) might not be the complete header name because headers can | |
985 | contain any printing characters in their names, except ':'. This function is | |
986 | called to read the rest of the name, chop h[eader]_ off the front, and put ':' | |
987 | on the end, if the name was terminated by white space. | |
988 | ||
989 | Arguments: | |
990 | name points to a buffer in which the name read so far exists | |
991 | max is the length of the buffer | |
992 | s points to the first character after the name so far, i.e. the | |
993 | first non-alphameric character after $header_xxxxx | |
994 | ||
995 | Returns: a pointer to the first character after the header name | |
996 | */ | |
997 | ||
998 | static uschar * | |
999 | read_header_name(uschar *name, int max, uschar *s) | |
1000 | { | |
1001 | int prelen = Ustrchr(name, '_') - name + 1; | |
1002 | int ptr = Ustrlen(name) - prelen; | |
1003 | if (ptr > 0) memmove(name, name+prelen, ptr); | |
1004 | while (mac_isgraph(*s) && *s != ':') | |
1005 | { | |
1006 | if (ptr < max-1) name[ptr++] = *s; | |
1007 | s++; | |
1008 | } | |
1009 | if (*s == ':') s++; | |
1010 | name[ptr++] = ':'; | |
1011 | name[ptr] = 0; | |
1012 | return s; | |
1013 | } | |
1014 | ||
1015 | ||
1016 | ||
1017 | /************************************************* | |
1018 | * Pick out a number from a string * | |
1019 | *************************************************/ | |
1020 | ||
1021 | /* Arguments: | |
1022 | n points to an integer into which to put the number | |
1023 | s points to the first digit of the number | |
1024 | ||
1025 | Returns: a pointer to the character after the last digit | |
1026 | */ | |
1027 | ||
1028 | static uschar * | |
1029 | read_number(int *n, uschar *s) | |
1030 | { | |
1031 | *n = 0; | |
1032 | while (isdigit(*s)) *n = *n * 10 + (*s++ - '0'); | |
1033 | return s; | |
1034 | } | |
1035 | ||
1036 | ||
1037 | ||
1038 | /************************************************* | |
1039 | * Extract keyed subfield from a string * | |
1040 | *************************************************/ | |
1041 | ||
1042 | /* The yield is in dynamic store; NULL means that the key was not found. | |
1043 | ||
1044 | Arguments: | |
1045 | key points to the name of the key | |
1046 | s points to the string from which to extract the subfield | |
1047 | ||
1048 | Returns: NULL if the subfield was not found, or | |
1049 | a pointer to the subfield's data | |
1050 | */ | |
1051 | ||
1052 | static uschar * | |
1053 | expand_getkeyed(uschar *key, uschar *s) | |
1054 | { | |
1055 | int length = Ustrlen(key); | |
1056 | while (isspace(*s)) s++; | |
1057 | ||
1058 | /* Loop to search for the key */ | |
1059 | ||
1060 | while (*s != 0) | |
1061 | { | |
1062 | int dkeylength; | |
1063 | uschar *data; | |
1064 | uschar *dkey = s; | |
1065 | ||
1066 | while (*s != 0 && *s != '=' && !isspace(*s)) s++; | |
1067 | dkeylength = s - dkey; | |
1068 | while (isspace(*s)) s++; | |
1069 | if (*s == '=') while (isspace((*(++s)))); | |
1070 | ||
1071 | data = string_dequote(&s); | |
1072 | if (length == dkeylength && strncmpic(key, dkey, length) == 0) | |
1073 | return data; | |
1074 | ||
1075 | while (isspace(*s)) s++; | |
1076 | } | |
1077 | ||
1078 | return NULL; | |
1079 | } | |
1080 | ||
1081 | ||
1082 | ||
9d1c15ef JH |
1083 | static var_entry * |
1084 | find_var_ent(uschar * name) | |
1085 | { | |
1086 | int first = 0; | |
1087 | int last = var_table_size; | |
1088 | ||
1089 | while (last > first) | |
1090 | { | |
1091 | int middle = (first + last)/2; | |
1092 | int c = Ustrcmp(name, var_table[middle].name); | |
1093 | ||
1094 | if (c > 0) { first = middle + 1; continue; } | |
1095 | if (c < 0) { last = middle; continue; } | |
1096 | return &var_table[middle]; | |
1097 | } | |
1098 | return NULL; | |
1099 | } | |
059ec3d9 PH |
1100 | |
1101 | /************************************************* | |
1102 | * Extract numbered subfield from string * | |
1103 | *************************************************/ | |
1104 | ||
1105 | /* Extracts a numbered field from a string that is divided by tokens - for | |
1106 | example a line from /etc/passwd is divided by colon characters. First field is | |
1107 | numbered one. Negative arguments count from the right. Zero returns the whole | |
1108 | string. Returns NULL if there are insufficient tokens in the string | |
1109 | ||
1110 | ***WARNING*** | |
1111 | Modifies final argument - this is a dynamically generated string, so that's OK. | |
1112 | ||
1113 | Arguments: | |
1114 | field number of field to be extracted, | |
1115 | first field = 1, whole string = 0, last field = -1 | |
1116 | separators characters that are used to break string into tokens | |
1117 | s points to the string from which to extract the subfield | |
1118 | ||
1119 | Returns: NULL if the field was not found, | |
1120 | a pointer to the field's data inside s (modified to add 0) | |
1121 | */ | |
1122 | ||
1123 | static uschar * | |
1124 | expand_gettokened (int field, uschar *separators, uschar *s) | |
1125 | { | |
1126 | int sep = 1; | |
1127 | int count; | |
1128 | uschar *ss = s; | |
1129 | uschar *fieldtext = NULL; | |
1130 | ||
1131 | if (field == 0) return s; | |
1132 | ||
1133 | /* Break the line up into fields in place; for field > 0 we stop when we have | |
1134 | done the number of fields we want. For field < 0 we continue till the end of | |
1135 | the string, counting the number of fields. */ | |
1136 | ||
1137 | count = (field > 0)? field : INT_MAX; | |
1138 | ||
1139 | while (count-- > 0) | |
1140 | { | |
1141 | size_t len; | |
1142 | ||
1143 | /* Previous field was the last one in the string. For a positive field | |
1144 | number, this means there are not enough fields. For a negative field number, | |
1145 | check that there are enough, and scan back to find the one that is wanted. */ | |
1146 | ||
1147 | if (sep == 0) | |
1148 | { | |
1149 | if (field > 0 || (-field) > (INT_MAX - count - 1)) return NULL; | |
1150 | if ((-field) == (INT_MAX - count - 1)) return s; | |
1151 | while (field++ < 0) | |
1152 | { | |
1153 | ss--; | |
1154 | while (ss[-1] != 0) ss--; | |
1155 | } | |
1156 | fieldtext = ss; | |
1157 | break; | |
1158 | } | |
1159 | ||
1160 | /* Previous field was not last in the string; save its start and put a | |
1161 | zero at its end. */ | |
1162 | ||
1163 | fieldtext = ss; | |
1164 | len = Ustrcspn(ss, separators); | |
1165 | sep = ss[len]; | |
1166 | ss[len] = 0; | |
1167 | ss += len + 1; | |
1168 | } | |
1169 | ||
1170 | return fieldtext; | |
1171 | } | |
1172 | ||
1173 | ||
aa26e137 | 1174 | static uschar * |
9d1c15ef | 1175 | expand_getlistele(int field, uschar * list) |
aa26e137 JH |
1176 | { |
1177 | uschar * tlist= list; | |
1178 | int sep= 0; | |
1179 | uschar dummy; | |
1180 | ||
1181 | if(field<0) | |
1182 | { | |
1183 | for(field++; string_nextinlist(&tlist, &sep, &dummy, 1); ) field++; | |
1184 | sep= 0; | |
1185 | } | |
1186 | if(field==0) return NULL; | |
1187 | while(--field>0 && (string_nextinlist(&list, &sep, &dummy, 1))) ; | |
1188 | return string_nextinlist(&list, &sep, NULL, 0); | |
1189 | } | |
059ec3d9 | 1190 | |
9d1c15ef JH |
1191 | |
1192 | /* Certificate fields, by name. Worry about by-OID later */ | |
9e4dddbd | 1193 | /* Names are chosen to not have common prefixes */ |
9d1c15ef JH |
1194 | |
1195 | #ifdef SUPPORT_TLS | |
1196 | typedef struct | |
1197 | { | |
1198 | uschar * name; | |
9e4dddbd JH |
1199 | int namelen; |
1200 | uschar * (*getfn)(void * cert, uschar * mod); | |
9d1c15ef JH |
1201 | } certfield; |
1202 | static certfield certfields[] = | |
1203 | { /* linear search; no special order */ | |
9e4dddbd JH |
1204 | { US"version", 7, &tls_cert_version }, |
1205 | { US"serial_number", 13, &tls_cert_serial_number }, | |
1206 | { US"subject", 7, &tls_cert_subject }, | |
1207 | { US"notbefore", 9, &tls_cert_not_before }, | |
1208 | { US"notafter", 8, &tls_cert_not_after }, | |
1209 | { US"issuer", 6, &tls_cert_issuer }, | |
1210 | { US"signature", 9, &tls_cert_signature }, | |
1211 | { US"sig_algorithm", 13, &tls_cert_signature_algorithm }, | |
1212 | { US"subj_altname", 12, &tls_cert_subject_altname }, | |
1213 | { US"ocsp_uri", 8, &tls_cert_ocsp_uri }, | |
1214 | { US"crl_uri", 7, &tls_cert_crl_uri }, | |
9d1c15ef JH |
1215 | }; |
1216 | ||
1217 | static uschar * | |
1218 | expand_getcertele(uschar * field, uschar * certvar) | |
1219 | { | |
1220 | var_entry * vp; | |
1221 | certfield * cp; | |
1222 | ||
1223 | if (!(vp = find_var_ent(certvar))) | |
1224 | { | |
1225 | expand_string_message = | |
1226 | string_sprintf("no variable named \"%s\"", certvar); | |
1227 | return NULL; /* Unknown variable name */ | |
1228 | } | |
1229 | /* NB this stops us passing certs around in variable. Might | |
1230 | want to do that in future */ | |
1231 | if (vp->type != vtype_cert) | |
1232 | { | |
1233 | expand_string_message = | |
1234 | string_sprintf("\"%s\" is not a certificate", certvar); | |
1235 | return NULL; /* Unknown variable name */ | |
1236 | } | |
1237 | if (!*(void **)vp->value) | |
1238 | return NULL; | |
1239 | ||
1240 | if (*field >= '0' && *field <= '9') | |
1241 | return tls_cert_ext_by_oid(*(void **)vp->value, field, 0); | |
1242 | ||
1243 | for(cp = certfields; | |
1244 | cp < certfields + nelements(certfields); | |
1245 | cp++) | |
9e4dddbd JH |
1246 | if (Ustrncmp(cp->name, field, cp->namelen) == 0) |
1247 | { | |
1248 | uschar * modifier = *(field += cp->namelen) == ',' | |
1249 | ? ++field : NULL; | |
1250 | return (*cp->getfn)( *(void **)vp->value, modifier ); | |
1251 | } | |
9d1c15ef JH |
1252 | |
1253 | expand_string_message = | |
1254 | string_sprintf("bad field selector \"%s\" for certextract", field); | |
1255 | return NULL; | |
1256 | } | |
1257 | #endif /*SUPPORT_TLS*/ | |
1258 | ||
059ec3d9 PH |
1259 | /************************************************* |
1260 | * Extract a substring from a string * | |
1261 | *************************************************/ | |
1262 | ||
1263 | /* Perform the ${substr or ${length expansion operations. | |
1264 | ||
1265 | Arguments: | |
1266 | subject the input string | |
1267 | value1 the offset from the start of the input string to the start of | |
1268 | the output string; if negative, count from the right. | |
1269 | value2 the length of the output string, or negative (-1) for unset | |
1270 | if value1 is positive, unset means "all after" | |
1271 | if value1 is negative, unset means "all before" | |
1272 | len set to the length of the returned string | |
1273 | ||
1274 | Returns: pointer to the output string, or NULL if there is an error | |
1275 | */ | |
1276 | ||
1277 | static uschar * | |
1278 | extract_substr(uschar *subject, int value1, int value2, int *len) | |
1279 | { | |
1280 | int sublen = Ustrlen(subject); | |
1281 | ||
1282 | if (value1 < 0) /* count from right */ | |
1283 | { | |
1284 | value1 += sublen; | |
1285 | ||
1286 | /* If the position is before the start, skip to the start, and adjust the | |
1287 | length. If the length ends up negative, the substring is null because nothing | |
1288 | can precede. This falls out naturally when the length is unset, meaning "all | |
1289 | to the left". */ | |
1290 | ||
1291 | if (value1 < 0) | |
1292 | { | |
1293 | value2 += value1; | |
1294 | if (value2 < 0) value2 = 0; | |
1295 | value1 = 0; | |
1296 | } | |
1297 | ||
1298 | /* Otherwise an unset length => characters before value1 */ | |
1299 | ||
1300 | else if (value2 < 0) | |
1301 | { | |
1302 | value2 = value1; | |
1303 | value1 = 0; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | /* For a non-negative offset, if the starting position is past the end of the | |
1308 | string, the result will be the null string. Otherwise, an unset length means | |
1309 | "rest"; just set it to the maximum - it will be cut down below if necessary. */ | |
1310 | ||
1311 | else | |
1312 | { | |
1313 | if (value1 > sublen) | |
1314 | { | |
1315 | value1 = sublen; | |
1316 | value2 = 0; | |
1317 | } | |
1318 | else if (value2 < 0) value2 = sublen; | |
1319 | } | |
1320 | ||
1321 | /* Cut the length down to the maximum possible for the offset value, and get | |
1322 | the required characters. */ | |
1323 | ||
1324 | if (value1 + value2 > sublen) value2 = sublen - value1; | |
1325 | *len = value2; | |
1326 | return subject + value1; | |
1327 | } | |
1328 | ||
1329 | ||
1330 | ||
1331 | ||
1332 | /************************************************* | |
1333 | * Old-style hash of a string * | |
1334 | *************************************************/ | |
1335 | ||
1336 | /* Perform the ${hash expansion operation. | |
1337 | ||
1338 | Arguments: | |
1339 | subject the input string (an expanded substring) | |
1340 | value1 the length of the output string; if greater or equal to the | |
1341 | length of the input string, the input string is returned | |
1342 | value2 the number of hash characters to use, or 26 if negative | |
1343 | len set to the length of the returned string | |
1344 | ||
1345 | Returns: pointer to the output string, or NULL if there is an error | |
1346 | */ | |
1347 | ||
1348 | static uschar * | |
1349 | compute_hash(uschar *subject, int value1, int value2, int *len) | |
1350 | { | |
1351 | int sublen = Ustrlen(subject); | |
1352 | ||
1353 | if (value2 < 0) value2 = 26; | |
1354 | else if (value2 > Ustrlen(hashcodes)) | |
1355 | { | |
1356 | expand_string_message = | |
1357 | string_sprintf("hash count \"%d\" too big", value2); | |
1358 | return NULL; | |
1359 | } | |
1360 | ||
1361 | /* Calculate the hash text. We know it is shorter than the original string, so | |
1362 | can safely place it in subject[] (we know that subject is always itself an | |
1363 | expanded substring). */ | |
1364 | ||
1365 | if (value1 < sublen) | |
1366 | { | |
1367 | int c; | |
1368 | int i = 0; | |
1369 | int j = value1; | |
1370 | while ((c = (subject[j])) != 0) | |
1371 | { | |
1372 | int shift = (c + j++) & 7; | |
1373 | subject[i] ^= (c << shift) | (c >> (8-shift)); | |
1374 | if (++i >= value1) i = 0; | |
1375 | } | |
1376 | for (i = 0; i < value1; i++) | |
1377 | subject[i] = hashcodes[(subject[i]) % value2]; | |
1378 | } | |
1379 | else value1 = sublen; | |
1380 | ||
1381 | *len = value1; | |
1382 | return subject; | |
1383 | } | |
1384 | ||
1385 | ||
1386 | ||
1387 | ||
1388 | /************************************************* | |
1389 | * Numeric hash of a string * | |
1390 | *************************************************/ | |
1391 | ||
1392 | /* Perform the ${nhash expansion operation. The first characters of the | |
1393 | string are treated as most important, and get the highest prime numbers. | |
1394 | ||
1395 | Arguments: | |
1396 | subject the input string | |
1397 | value1 the maximum value of the first part of the result | |
1398 | value2 the maximum value of the second part of the result, | |
1399 | or negative to produce only a one-part result | |
1400 | len set to the length of the returned string | |
1401 | ||
1402 | Returns: pointer to the output string, or NULL if there is an error. | |
1403 | */ | |
1404 | ||
1405 | static uschar * | |
1406 | compute_nhash (uschar *subject, int value1, int value2, int *len) | |
1407 | { | |
1408 | uschar *s = subject; | |
1409 | int i = 0; | |
1410 | unsigned long int total = 0; /* no overflow */ | |
1411 | ||
1412 | while (*s != 0) | |
1413 | { | |
1414 | if (i == 0) i = sizeof(prime)/sizeof(int) - 1; | |
1415 | total += prime[i--] * (unsigned int)(*s++); | |
1416 | } | |
1417 | ||
1418 | /* If value2 is unset, just compute one number */ | |
1419 | ||
1420 | if (value2 < 0) | |
1421 | { | |
1422 | s = string_sprintf("%d", total % value1); | |
1423 | } | |
1424 | ||
1425 | /* Otherwise do a div/mod hash */ | |
1426 | ||
1427 | else | |
1428 | { | |
1429 | total = total % (value1 * value2); | |
1430 | s = string_sprintf("%d/%d", total/value2, total % value2); | |
1431 | } | |
1432 | ||
1433 | *len = Ustrlen(s); | |
1434 | return s; | |
1435 | } | |
1436 | ||
1437 | ||
1438 | ||
1439 | ||
1440 | ||
1441 | /************************************************* | |
1442 | * Find the value of a header or headers * | |
1443 | *************************************************/ | |
1444 | ||
1445 | /* Multiple instances of the same header get concatenated, and this function | |
1446 | can also return a concatenation of all the header lines. When concatenating | |
1447 | specific headers that contain lists of addresses, a comma is inserted between | |
1448 | them. Otherwise we use a straight concatenation. Because some messages can have | |
1449 | pathologically large number of lines, there is a limit on the length that is | |
1450 | returned. Also, to avoid massive store use which would result from using | |
1451 | string_cat() as it copies and extends strings, we do a preliminary pass to find | |
1452 | out exactly how much store will be needed. On "normal" messages this will be | |
1453 | pretty trivial. | |
1454 | ||
1455 | Arguments: | |
1456 | name the name of the header, without the leading $header_ or $h_, | |
1457 | or NULL if a concatenation of all headers is required | |
1458 | exists_only TRUE if called from a def: test; don't need to build a string; | |
1459 | just return a string that is not "" and not "0" if the header | |
1460 | exists | |
1461 | newsize return the size of memory block that was obtained; may be NULL | |
1462 | if exists_only is TRUE | |
1463 | want_raw TRUE if called for $rh_ or $rheader_ variables; no processing, | |
ff75a1f7 PH |
1464 | other than concatenating, will be done on the header. Also used |
1465 | for $message_headers_raw. | |
059ec3d9 PH |
1466 | charset name of charset to translate MIME words to; used only if |
1467 | want_raw is false; if NULL, no translation is done (this is | |
1468 | used for $bh_ and $bheader_) | |
1469 | ||
1470 | Returns: NULL if the header does not exist, else a pointer to a new | |
1471 | store block | |
1472 | */ | |
1473 | ||
1474 | static uschar * | |
1475 | find_header(uschar *name, BOOL exists_only, int *newsize, BOOL want_raw, | |
1476 | uschar *charset) | |
1477 | { | |
1478 | BOOL found = name == NULL; | |
1479 | int comma = 0; | |
1480 | int len = found? 0 : Ustrlen(name); | |
1481 | int i; | |
1482 | uschar *yield = NULL; | |
1483 | uschar *ptr = NULL; | |
1484 | ||
1485 | /* Loop for two passes - saves code repetition */ | |
1486 | ||
1487 | for (i = 0; i < 2; i++) | |
1488 | { | |
1489 | int size = 0; | |
1490 | header_line *h; | |
1491 | ||
1492 | for (h = header_list; size < header_insert_maxlen && h != NULL; h = h->next) | |
1493 | { | |
1494 | if (h->type != htype_old && h->text != NULL) /* NULL => Received: placeholder */ | |
1495 | { | |
1496 | if (name == NULL || (len <= h->slen && strncmpic(name, h->text, len) == 0)) | |
1497 | { | |
1498 | int ilen; | |
1499 | uschar *t; | |
1500 | ||
1501 | if (exists_only) return US"1"; /* don't need actual string */ | |
1502 | found = TRUE; | |
1503 | t = h->text + len; /* text to insert */ | |
1504 | if (!want_raw) /* unless wanted raw, */ | |
1505 | while (isspace(*t)) t++; /* remove leading white space */ | |
1506 | ilen = h->slen - (t - h->text); /* length to insert */ | |
1507 | ||
fd700877 PH |
1508 | /* Unless wanted raw, remove trailing whitespace, including the |
1509 | newline. */ | |
1510 | ||
1511 | if (!want_raw) | |
1512 | while (ilen > 0 && isspace(t[ilen-1])) ilen--; | |
1513 | ||
059ec3d9 PH |
1514 | /* Set comma = 1 if handling a single header and it's one of those |
1515 | that contains an address list, except when asked for raw headers. Only | |
1516 | need to do this once. */ | |
1517 | ||
1518 | if (!want_raw && name != NULL && comma == 0 && | |
1519 | Ustrchr("BCFRST", h->type) != NULL) | |
1520 | comma = 1; | |
1521 | ||
1522 | /* First pass - compute total store needed; second pass - compute | |
1523 | total store used, including this header. */ | |
1524 | ||
fd700877 | 1525 | size += ilen + comma + 1; /* +1 for the newline */ |
059ec3d9 PH |
1526 | |
1527 | /* Second pass - concatentate the data, up to a maximum. Note that | |
1528 | the loop stops when size hits the limit. */ | |
1529 | ||
1530 | if (i != 0) | |
1531 | { | |
1532 | if (size > header_insert_maxlen) | |
1533 | { | |
fd700877 | 1534 | ilen -= size - header_insert_maxlen - 1; |
059ec3d9 PH |
1535 | comma = 0; |
1536 | } | |
1537 | Ustrncpy(ptr, t, ilen); | |
1538 | ptr += ilen; | |
fd700877 PH |
1539 | |
1540 | /* For a non-raw header, put in the comma if needed, then add | |
3168332a PH |
1541 | back the newline we removed above, provided there was some text in |
1542 | the header. */ | |
fd700877 | 1543 | |
3168332a | 1544 | if (!want_raw && ilen > 0) |
059ec3d9 | 1545 | { |
3168332a | 1546 | if (comma != 0) *ptr++ = ','; |
059ec3d9 PH |
1547 | *ptr++ = '\n'; |
1548 | } | |
1549 | } | |
1550 | } | |
1551 | } | |
1552 | } | |
1553 | ||
fd700877 PH |
1554 | /* At end of first pass, return NULL if no header found. Then truncate size |
1555 | if necessary, and get the buffer to hold the data, returning the buffer size. | |
1556 | */ | |
059ec3d9 PH |
1557 | |
1558 | if (i == 0) | |
1559 | { | |
1560 | if (!found) return NULL; | |
1561 | if (size > header_insert_maxlen) size = header_insert_maxlen; | |
1562 | *newsize = size + 1; | |
1563 | ptr = yield = store_get(*newsize); | |
1564 | } | |
1565 | } | |
1566 | ||
059ec3d9 PH |
1567 | /* That's all we do for raw header expansion. */ |
1568 | ||
1569 | if (want_raw) | |
1570 | { | |
1571 | *ptr = 0; | |
1572 | } | |
1573 | ||
fd700877 PH |
1574 | /* Otherwise, remove a final newline and a redundant added comma. Then we do |
1575 | RFC 2047 decoding, translating the charset if requested. The rfc2047_decode2() | |
059ec3d9 PH |
1576 | function can return an error with decoded data if the charset translation |
1577 | fails. If decoding fails, it returns NULL. */ | |
1578 | ||
1579 | else | |
1580 | { | |
1581 | uschar *decoded, *error; | |
3168332a | 1582 | if (ptr > yield && ptr[-1] == '\n') ptr--; |
fd700877 | 1583 | if (ptr > yield && comma != 0 && ptr[-1] == ',') ptr--; |
059ec3d9 | 1584 | *ptr = 0; |
a0d6ba8a PH |
1585 | decoded = rfc2047_decode2(yield, check_rfc2047_length, charset, '?', NULL, |
1586 | newsize, &error); | |
059ec3d9 PH |
1587 | if (error != NULL) |
1588 | { | |
1589 | DEBUG(D_any) debug_printf("*** error in RFC 2047 decoding: %s\n" | |
1590 | " input was: %s\n", error, yield); | |
1591 | } | |
1592 | if (decoded != NULL) yield = decoded; | |
1593 | } | |
1594 | ||
1595 | return yield; | |
1596 | } | |
1597 | ||
1598 | ||
1599 | ||
1600 | ||
362145b5 JH |
1601 | /************************************************* |
1602 | * Return list of recipients * | |
1603 | *************************************************/ | |
1604 | /* A recipients list is available only during system message filtering, | |
1605 | during ACL processing after DATA, and while expanding pipe commands | |
1606 | generated from a system filter, but not elsewhere. */ | |
1607 | ||
1608 | static uschar * | |
1609 | fn_recipients(void) | |
1610 | { | |
1611 | if (!enable_dollar_recipients) return NULL; else | |
1612 | { | |
1613 | int size = 128; | |
1614 | int ptr = 0; | |
1615 | int i; | |
1616 | uschar * s = store_get(size); | |
1617 | for (i = 0; i < recipients_count; i++) | |
1618 | { | |
1619 | if (i != 0) s = string_cat(s, &size, &ptr, US", ", 2); | |
1620 | s = string_cat(s, &size, &ptr, recipients_list[i].address, | |
1621 | Ustrlen(recipients_list[i].address)); | |
1622 | } | |
1623 | s[ptr] = 0; /* string_cat() leaves room */ | |
1624 | return s; | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | ||
059ec3d9 PH |
1629 | /************************************************* |
1630 | * Find value of a variable * | |
1631 | *************************************************/ | |
1632 | ||
1633 | /* The table of variables is kept in alphabetic order, so we can search it | |
1634 | using a binary chop. The "choplen" variable is nothing to do with the binary | |
1635 | chop. | |
1636 | ||
1637 | Arguments: | |
1638 | name the name of the variable being sought | |
1639 | exists_only TRUE if this is a def: test; passed on to find_header() | |
1640 | skipping TRUE => skip any processing evaluation; this is not the same as | |
1641 | exists_only because def: may test for values that are first | |
1642 | evaluated here | |
1643 | newsize pointer to an int which is initially zero; if the answer is in | |
1644 | a new memory buffer, *newsize is set to its size | |
1645 | ||
1646 | Returns: NULL if the variable does not exist, or | |
1647 | a pointer to the variable's contents, or | |
1648 | something non-NULL if exists_only is TRUE | |
1649 | */ | |
1650 | ||
1651 | static uschar * | |
1652 | find_variable(uschar *name, BOOL exists_only, BOOL skipping, int *newsize) | |
1653 | { | |
9d1c15ef JH |
1654 | var_entry * vp; |
1655 | uschar *s, *domain; | |
1656 | uschar **ss; | |
1657 | void * val; | |
059ec3d9 | 1658 | |
38a0a95f PH |
1659 | /* Handle ACL variables, whose names are of the form acl_cxxx or acl_mxxx. |
1660 | Originally, xxx had to be a number in the range 0-9 (later 0-19), but from | |
1661 | release 4.64 onwards arbitrary names are permitted, as long as the first 5 | |
641cb756 PH |
1662 | characters are acl_c or acl_m and the sixth is either a digit or an underscore |
1663 | (this gave backwards compatibility at the changeover). There may be built-in | |
1664 | variables whose names start acl_ but they should never start in this way. This | |
1665 | slightly messy specification is a consequence of the history, needless to say. | |
47ca6d6c | 1666 | |
38a0a95f PH |
1667 | If an ACL variable does not exist, treat it as empty, unless strict_acl_vars is |
1668 | set, in which case give an error. */ | |
47ca6d6c | 1669 | |
641cb756 PH |
1670 | if ((Ustrncmp(name, "acl_c", 5) == 0 || Ustrncmp(name, "acl_m", 5) == 0) && |
1671 | !isalpha(name[5])) | |
38a0a95f PH |
1672 | { |
1673 | tree_node *node = | |
1674 | tree_search((name[4] == 'c')? acl_var_c : acl_var_m, name + 4); | |
1675 | return (node == NULL)? (strict_acl_vars? NULL : US"") : node->data.ptr; | |
47ca6d6c PH |
1676 | } |
1677 | ||
38a0a95f | 1678 | /* Handle $auth<n> variables. */ |
f78eb7c6 PH |
1679 | |
1680 | if (Ustrncmp(name, "auth", 4) == 0) | |
1681 | { | |
1682 | uschar *endptr; | |
1683 | int n = Ustrtoul(name + 4, &endptr, 10); | |
1684 | if (*endptr == 0 && n != 0 && n <= AUTH_VARS) | |
1685 | return (auth_vars[n-1] == NULL)? US"" : auth_vars[n-1]; | |
1686 | } | |
1687 | ||
47ca6d6c PH |
1688 | /* For all other variables, search the table */ |
1689 | ||
9d1c15ef JH |
1690 | if (!(vp = find_var_ent(name))) |
1691 | return NULL; /* Unknown variable name */ | |
059ec3d9 | 1692 | |
9d1c15ef JH |
1693 | /* Found an existing variable. If in skipping state, the value isn't needed, |
1694 | and we want to avoid processing (such as looking up the host name). */ | |
059ec3d9 | 1695 | |
9d1c15ef JH |
1696 | if (skipping) |
1697 | return US""; | |
059ec3d9 | 1698 | |
9d1c15ef JH |
1699 | val = vp->value; |
1700 | switch (vp->type) | |
1701 | { | |
1702 | case vtype_filter_int: | |
1703 | if (!filter_running) return NULL; | |
1704 | /* Fall through */ | |
1705 | /* VVVVVVVVVVVV */ | |
1706 | case vtype_int: | |
1707 | sprintf(CS var_buffer, "%d", *(int *)(val)); /* Integer */ | |
1708 | return var_buffer; | |
1709 | ||
1710 | case vtype_ino: | |
1711 | sprintf(CS var_buffer, "%ld", (long int)(*(ino_t *)(val))); /* Inode */ | |
1712 | return var_buffer; | |
1713 | ||
1714 | case vtype_gid: | |
1715 | sprintf(CS var_buffer, "%ld", (long int)(*(gid_t *)(val))); /* gid */ | |
1716 | return var_buffer; | |
1717 | ||
1718 | case vtype_uid: | |
1719 | sprintf(CS var_buffer, "%ld", (long int)(*(uid_t *)(val))); /* uid */ | |
1720 | return var_buffer; | |
1721 | ||
1722 | case vtype_bool: | |
1723 | sprintf(CS var_buffer, "%s", *(BOOL *)(val) ? "yes" : "no"); /* bool */ | |
1724 | return var_buffer; | |
1725 | ||
1726 | case vtype_stringptr: /* Pointer to string */ | |
1727 | s = *((uschar **)(val)); | |
1728 | return (s == NULL)? US"" : s; | |
1729 | ||
1730 | case vtype_pid: | |
1731 | sprintf(CS var_buffer, "%d", (int)getpid()); /* pid */ | |
1732 | return var_buffer; | |
1733 | ||
1734 | case vtype_load_avg: | |
1735 | sprintf(CS var_buffer, "%d", OS_GETLOADAVG()); /* load_average */ | |
1736 | return var_buffer; | |
1737 | ||
1738 | case vtype_host_lookup: /* Lookup if not done so */ | |
1739 | if (sender_host_name == NULL && sender_host_address != NULL && | |
1740 | !host_lookup_failed && host_name_lookup() == OK) | |
1741 | host_build_sender_fullhost(); | |
1742 | return (sender_host_name == NULL)? US"" : sender_host_name; | |
1743 | ||
1744 | case vtype_localpart: /* Get local part from address */ | |
1745 | s = *((uschar **)(val)); | |
1746 | if (s == NULL) return US""; | |
1747 | domain = Ustrrchr(s, '@'); | |
1748 | if (domain == NULL) return s; | |
1749 | if (domain - s > sizeof(var_buffer) - 1) | |
1750 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "local part longer than " SIZE_T_FMT | |
1751 | " in string expansion", sizeof(var_buffer)); | |
1752 | Ustrncpy(var_buffer, s, domain - s); | |
1753 | var_buffer[domain - s] = 0; | |
1754 | return var_buffer; | |
1755 | ||
1756 | case vtype_domain: /* Get domain from address */ | |
1757 | s = *((uschar **)(val)); | |
1758 | if (s == NULL) return US""; | |
1759 | domain = Ustrrchr(s, '@'); | |
1760 | return (domain == NULL)? US"" : domain + 1; | |
1761 | ||
1762 | case vtype_msgheaders: | |
1763 | return find_header(NULL, exists_only, newsize, FALSE, NULL); | |
1764 | ||
1765 | case vtype_msgheaders_raw: | |
1766 | return find_header(NULL, exists_only, newsize, TRUE, NULL); | |
1767 | ||
1768 | case vtype_msgbody: /* Pointer to msgbody string */ | |
1769 | case vtype_msgbody_end: /* Ditto, the end of the msg */ | |
1770 | ss = (uschar **)(val); | |
1771 | if (*ss == NULL && deliver_datafile >= 0) /* Read body when needed */ | |
059ec3d9 | 1772 | { |
9d1c15ef JH |
1773 | uschar *body; |
1774 | off_t start_offset = SPOOL_DATA_START_OFFSET; | |
1775 | int len = message_body_visible; | |
1776 | if (len > message_size) len = message_size; | |
1777 | *ss = body = store_malloc(len+1); | |
1778 | body[0] = 0; | |
1779 | if (vp->type == vtype_msgbody_end) | |
059ec3d9 | 1780 | { |
9d1c15ef JH |
1781 | struct stat statbuf; |
1782 | if (fstat(deliver_datafile, &statbuf) == 0) | |
1783 | { | |
1784 | start_offset = statbuf.st_size - len; | |
1785 | if (start_offset < SPOOL_DATA_START_OFFSET) | |
1786 | start_offset = SPOOL_DATA_START_OFFSET; | |
1787 | } | |
1788 | } | |
1789 | lseek(deliver_datafile, start_offset, SEEK_SET); | |
1790 | len = read(deliver_datafile, body, len); | |
1791 | if (len > 0) | |
1792 | { | |
1793 | body[len] = 0; | |
1794 | if (message_body_newlines) /* Separate loops for efficiency */ | |
1795 | { | |
1796 | while (len > 0) | |
1797 | { if (body[--len] == 0) body[len] = ' '; } | |
1798 | } | |
1799 | else | |
1800 | { | |
1801 | while (len > 0) | |
1802 | { if (body[--len] == '\n' || body[len] == 0) body[len] = ' '; } | |
1803 | } | |
059ec3d9 | 1804 | } |
9d1c15ef JH |
1805 | } |
1806 | return (*ss == NULL)? US"" : *ss; | |
059ec3d9 | 1807 | |
9d1c15ef JH |
1808 | case vtype_todbsdin: /* BSD inbox time of day */ |
1809 | return tod_stamp(tod_bsdin); | |
059ec3d9 | 1810 | |
9d1c15ef JH |
1811 | case vtype_tode: /* Unix epoch time of day */ |
1812 | return tod_stamp(tod_epoch); | |
059ec3d9 | 1813 | |
9d1c15ef JH |
1814 | case vtype_todel: /* Unix epoch/usec time of day */ |
1815 | return tod_stamp(tod_epoch_l); | |
f5787926 | 1816 | |
9d1c15ef JH |
1817 | case vtype_todf: /* Full time of day */ |
1818 | return tod_stamp(tod_full); | |
059ec3d9 | 1819 | |
9d1c15ef JH |
1820 | case vtype_todl: /* Log format time of day */ |
1821 | return tod_stamp(tod_log_bare); /* (without timezone) */ | |
059ec3d9 | 1822 | |
9d1c15ef JH |
1823 | case vtype_todzone: /* Time zone offset only */ |
1824 | return tod_stamp(tod_zone); | |
059ec3d9 | 1825 | |
9d1c15ef JH |
1826 | case vtype_todzulu: /* Zulu time */ |
1827 | return tod_stamp(tod_zulu); | |
059ec3d9 | 1828 | |
9d1c15ef JH |
1829 | case vtype_todlf: /* Log file datestamp tod */ |
1830 | return tod_stamp(tod_log_datestamp_daily); | |
059ec3d9 | 1831 | |
9d1c15ef JH |
1832 | case vtype_reply: /* Get reply address */ |
1833 | s = find_header(US"reply-to:", exists_only, newsize, TRUE, | |
1834 | headers_charset); | |
1835 | if (s != NULL) while (isspace(*s)) s++; | |
1836 | if (s == NULL || *s == 0) | |
1837 | { | |
1838 | *newsize = 0; /* For the *s==0 case */ | |
1839 | s = find_header(US"from:", exists_only, newsize, TRUE, headers_charset); | |
1840 | } | |
1841 | if (s != NULL) | |
1842 | { | |
1843 | uschar *t; | |
1844 | while (isspace(*s)) s++; | |
1845 | for (t = s; *t != 0; t++) if (*t == '\n') *t = ' '; | |
1846 | while (t > s && isspace(t[-1])) t--; | |
1847 | *t = 0; | |
1848 | } | |
1849 | return (s == NULL)? US"" : s; | |
059ec3d9 | 1850 | |
9d1c15ef JH |
1851 | case vtype_string_func: |
1852 | { | |
1853 | uschar * (*fn)() = val; | |
1854 | return fn(); | |
1855 | } | |
8e669ac1 | 1856 | |
9d1c15ef JH |
1857 | case vtype_pspace: |
1858 | { | |
1859 | int inodes; | |
1860 | sprintf(CS var_buffer, "%d", | |
1861 | receive_statvfs(val == (void *)TRUE, &inodes)); | |
1862 | } | |
1863 | return var_buffer; | |
8e669ac1 | 1864 | |
9d1c15ef JH |
1865 | case vtype_pinodes: |
1866 | { | |
1867 | int inodes; | |
1868 | (void) receive_statvfs(val == (void *)TRUE, &inodes); | |
1869 | sprintf(CS var_buffer, "%d", inodes); | |
1870 | } | |
1871 | return var_buffer; | |
80a47a2c | 1872 | |
9d1c15ef JH |
1873 | case vtype_cert: |
1874 | return *(void **)val ? US"<cert>" : US""; | |
80a47a2c | 1875 | |
9d1c15ef JH |
1876 | #ifndef DISABLE_DKIM |
1877 | case vtype_dkim: | |
1878 | return dkim_exim_expand_query((int)(long)val); | |
1879 | #endif | |
059ec3d9 | 1880 | |
9d1c15ef | 1881 | } |
6c08476d LM |
1882 | |
1883 | return NULL; /* Unknown variable. Silences static checkers. */ | |
059ec3d9 PH |
1884 | } |
1885 | ||
1886 | ||
1887 | ||
1888 | ||
d9b2312b JH |
1889 | void |
1890 | modify_variable(uschar *name, void * value) | |
1891 | { | |
9d1c15ef JH |
1892 | var_entry * vp; |
1893 | if ((vp = find_var_ent(name))) vp->value = value; | |
d9b2312b JH |
1894 | return; /* Unknown variable name, fail silently */ |
1895 | } | |
1896 | ||
1897 | ||
1898 | ||
1899 | ||
1900 | ||
059ec3d9 PH |
1901 | /************************************************* |
1902 | * Read and expand substrings * | |
1903 | *************************************************/ | |
1904 | ||
1905 | /* This function is called to read and expand argument substrings for various | |
1906 | expansion items. Some have a minimum requirement that is less than the maximum; | |
1907 | in these cases, the first non-present one is set to NULL. | |
1908 | ||
1909 | Arguments: | |
1910 | sub points to vector of pointers to set | |
1911 | n maximum number of substrings | |
1912 | m minimum required | |
1913 | sptr points to current string pointer | |
1914 | skipping the skipping flag | |
1915 | check_end if TRUE, check for final '}' | |
1916 | name name of item, for error message | |
b0e85a8f JH |
1917 | resetok if not NULL, pointer to flag - write FALSE if unsafe to reset |
1918 | the store. | |
059ec3d9 PH |
1919 | |
1920 | Returns: 0 OK; string pointer updated | |
1921 | 1 curly bracketing error (too few arguments) | |
1922 | 2 too many arguments (only if check_end is set); message set | |
1923 | 3 other error (expansion failure) | |
1924 | */ | |
1925 | ||
1926 | static int | |
1927 | read_subs(uschar **sub, int n, int m, uschar **sptr, BOOL skipping, | |
b0e85a8f | 1928 | BOOL check_end, uschar *name, BOOL *resetok) |
059ec3d9 PH |
1929 | { |
1930 | int i; | |
1931 | uschar *s = *sptr; | |
1932 | ||
1933 | while (isspace(*s)) s++; | |
1934 | for (i = 0; i < n; i++) | |
1935 | { | |
1936 | if (*s != '{') | |
1937 | { | |
1938 | if (i < m) return 1; | |
1939 | sub[i] = NULL; | |
1940 | break; | |
1941 | } | |
b0e85a8f | 1942 | sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, resetok); |
059ec3d9 PH |
1943 | if (sub[i] == NULL) return 3; |
1944 | if (*s++ != '}') return 1; | |
1945 | while (isspace(*s)) s++; | |
1946 | } | |
1947 | if (check_end && *s++ != '}') | |
1948 | { | |
1949 | if (s[-1] == '{') | |
1950 | { | |
1951 | expand_string_message = string_sprintf("Too many arguments for \"%s\" " | |
1952 | "(max is %d)", name, n); | |
1953 | return 2; | |
1954 | } | |
1955 | return 1; | |
1956 | } | |
1957 | ||
1958 | *sptr = s; | |
1959 | return 0; | |
1960 | } | |
1961 | ||
1962 | ||
1963 | ||
1964 | ||
641cb756 PH |
1965 | /************************************************* |
1966 | * Elaborate message for bad variable * | |
1967 | *************************************************/ | |
1968 | ||
1969 | /* For the "unknown variable" message, take a look at the variable's name, and | |
1970 | give additional information about possible ACL variables. The extra information | |
1971 | is added on to expand_string_message. | |
1972 | ||
1973 | Argument: the name of the variable | |
1974 | Returns: nothing | |
1975 | */ | |
1976 | ||
1977 | static void | |
1978 | check_variable_error_message(uschar *name) | |
1979 | { | |
1980 | if (Ustrncmp(name, "acl_", 4) == 0) | |
1981 | expand_string_message = string_sprintf("%s (%s)", expand_string_message, | |
1982 | (name[4] == 'c' || name[4] == 'm')? | |
1983 | (isalpha(name[5])? | |
1984 | US"6th character of a user-defined ACL variable must be a digit or underscore" : | |
1985 | US"strict_acl_vars is set" /* Syntax is OK, it has to be this */ | |
1986 | ) : | |
1987 | US"user-defined ACL variables must start acl_c or acl_m"); | |
1988 | } | |
1989 | ||
1990 | ||
1991 | ||
f60d98e8 JH |
1992 | /* |
1993 | Load args from sub array to globals, and call acl_check(). | |
ef21c07d | 1994 | Sub array will be corrupted on return. |
f60d98e8 JH |
1995 | |
1996 | Returns: OK access is granted by an ACCEPT verb | |
1997 | DISCARD access is granted by a DISCARD verb | |
1998 | FAIL access is denied | |
1999 | FAIL_DROP access is denied; drop the connection | |
2000 | DEFER can't tell at the moment | |
2001 | ERROR disaster | |
2002 | */ | |
2003 | static int | |
2004 | eval_acl(uschar ** sub, int nsub, uschar ** user_msgp) | |
2005 | { | |
2006 | int i; | |
ef21c07d JH |
2007 | uschar *tmp; |
2008 | int sav_narg = acl_narg; | |
2009 | int ret; | |
faa05a93 | 2010 | extern int acl_where; |
f60d98e8 | 2011 | |
ef21c07d JH |
2012 | if(--nsub > sizeof(acl_arg)/sizeof(*acl_arg)) nsub = sizeof(acl_arg)/sizeof(*acl_arg); |
2013 | for (i = 0; i < nsub && sub[i+1]; i++) | |
2014 | { | |
2015 | tmp = acl_arg[i]; | |
2016 | acl_arg[i] = sub[i+1]; /* place callers args in the globals */ | |
2017 | sub[i+1] = tmp; /* stash the old args using our caller's storage */ | |
2018 | } | |
2019 | acl_narg = i; | |
bef3ea7f | 2020 | while (i < nsub) |
ef21c07d JH |
2021 | { |
2022 | sub[i+1] = acl_arg[i]; | |
2023 | acl_arg[i++] = NULL; | |
2024 | } | |
f60d98e8 JH |
2025 | |
2026 | DEBUG(D_expand) | |
2027 | debug_printf("expanding: acl: %s arg: %s%s\n", | |
2028 | sub[0], | |
60f8e1e8 JH |
2029 | acl_narg>0 ? acl_arg[0] : US"<none>", |
2030 | acl_narg>1 ? " +more" : ""); | |
f60d98e8 | 2031 | |
05caaeaa | 2032 | ret = acl_eval(acl_where, sub[0], user_msgp, &tmp); |
ef21c07d JH |
2033 | |
2034 | for (i = 0; i < nsub; i++) | |
2035 | acl_arg[i] = sub[i+1]; /* restore old args */ | |
2036 | acl_narg = sav_narg; | |
2037 | ||
2038 | return ret; | |
f60d98e8 JH |
2039 | } |
2040 | ||
2041 | ||
2042 | ||
2043 | ||
059ec3d9 PH |
2044 | /************************************************* |
2045 | * Read and evaluate a condition * | |
2046 | *************************************************/ | |
2047 | ||
2048 | /* | |
2049 | Arguments: | |
2050 | s points to the start of the condition text | |
b0e85a8f JH |
2051 | resetok points to a BOOL which is written false if it is unsafe to |
2052 | free memory. Certain condition types (acl) may have side-effect | |
2053 | allocation which must be preserved. | |
059ec3d9 PH |
2054 | yield points to a BOOL to hold the result of the condition test; |
2055 | if NULL, we are just reading through a condition that is | |
2056 | part of an "or" combination to check syntax, or in a state | |
2057 | where the answer isn't required | |
2058 | ||
2059 | Returns: a pointer to the first character after the condition, or | |
2060 | NULL after an error | |
2061 | */ | |
2062 | ||
2063 | static uschar * | |
b0e85a8f | 2064 | eval_condition(uschar *s, BOOL *resetok, BOOL *yield) |
059ec3d9 PH |
2065 | { |
2066 | BOOL testfor = TRUE; | |
2067 | BOOL tempcond, combined_cond; | |
2068 | BOOL *subcondptr; | |
5cfd2e57 | 2069 | BOOL sub2_honour_dollar = TRUE; |
059ec3d9 | 2070 | int i, rc, cond_type, roffset; |
97d17305 | 2071 | int_eximarith_t num[2]; |
059ec3d9 PH |
2072 | struct stat statbuf; |
2073 | uschar name[256]; | |
f60d98e8 | 2074 | uschar *sub[10]; |
059ec3d9 PH |
2075 | |
2076 | const pcre *re; | |
2077 | const uschar *rerror; | |
2078 | ||
2079 | for (;;) | |
2080 | { | |
2081 | while (isspace(*s)) s++; | |
2082 | if (*s == '!') { testfor = !testfor; s++; } else break; | |
2083 | } | |
2084 | ||
2085 | /* Numeric comparisons are symbolic */ | |
2086 | ||
2087 | if (*s == '=' || *s == '>' || *s == '<') | |
2088 | { | |
2089 | int p = 0; | |
2090 | name[p++] = *s++; | |
2091 | if (*s == '=') | |
2092 | { | |
2093 | name[p++] = '='; | |
2094 | s++; | |
2095 | } | |
2096 | name[p] = 0; | |
2097 | } | |
2098 | ||
2099 | /* All other conditions are named */ | |
2100 | ||
2101 | else s = read_name(name, 256, s, US"_"); | |
2102 | ||
2103 | /* If we haven't read a name, it means some non-alpha character is first. */ | |
2104 | ||
2105 | if (name[0] == 0) | |
2106 | { | |
2107 | expand_string_message = string_sprintf("condition name expected, " | |
2108 | "but found \"%.16s\"", s); | |
2109 | return NULL; | |
2110 | } | |
2111 | ||
2112 | /* Find which condition we are dealing with, and switch on it */ | |
2113 | ||
2114 | cond_type = chop_match(name, cond_table, sizeof(cond_table)/sizeof(uschar *)); | |
2115 | switch(cond_type) | |
2116 | { | |
9b4768fa PH |
2117 | /* def: tests for a non-empty variable, or for the existence of a header. If |
2118 | yield == NULL we are in a skipping state, and don't care about the answer. */ | |
059ec3d9 PH |
2119 | |
2120 | case ECOND_DEF: | |
2121 | if (*s != ':') | |
2122 | { | |
2123 | expand_string_message = US"\":\" expected after \"def\""; | |
2124 | return NULL; | |
2125 | } | |
2126 | ||
2127 | s = read_name(name, 256, s+1, US"_"); | |
2128 | ||
0d85fa3f PH |
2129 | /* Test for a header's existence. If the name contains a closing brace |
2130 | character, this may be a user error where the terminating colon has been | |
2131 | omitted. Set a flag to adjust a subsequent error message in this case. */ | |
059ec3d9 PH |
2132 | |
2133 | if (Ustrncmp(name, "h_", 2) == 0 || | |
2134 | Ustrncmp(name, "rh_", 3) == 0 || | |
2135 | Ustrncmp(name, "bh_", 3) == 0 || | |
2136 | Ustrncmp(name, "header_", 7) == 0 || | |
2137 | Ustrncmp(name, "rheader_", 8) == 0 || | |
2138 | Ustrncmp(name, "bheader_", 8) == 0) | |
2139 | { | |
2140 | s = read_header_name(name, 256, s); | |
b5b871ac | 2141 | /* {-for-text-editors */ |
0d85fa3f | 2142 | if (Ustrchr(name, '}') != NULL) malformed_header = TRUE; |
059ec3d9 PH |
2143 | if (yield != NULL) *yield = |
2144 | (find_header(name, TRUE, NULL, FALSE, NULL) != NULL) == testfor; | |
2145 | } | |
2146 | ||
9b4768fa PH |
2147 | /* Test for a variable's having a non-empty value. A non-existent variable |
2148 | causes an expansion failure. */ | |
059ec3d9 PH |
2149 | |
2150 | else | |
2151 | { | |
2152 | uschar *value = find_variable(name, TRUE, yield == NULL, NULL); | |
2153 | if (value == NULL) | |
2154 | { | |
2155 | expand_string_message = (name[0] == 0)? | |
2156 | string_sprintf("variable name omitted after \"def:\"") : | |
2157 | string_sprintf("unknown variable \"%s\" after \"def:\"", name); | |
641cb756 | 2158 | check_variable_error_message(name); |
059ec3d9 PH |
2159 | return NULL; |
2160 | } | |
9b4768fa | 2161 | if (yield != NULL) *yield = (value[0] != 0) == testfor; |
059ec3d9 PH |
2162 | } |
2163 | ||
2164 | return s; | |
2165 | ||
2166 | ||
2167 | /* first_delivery tests for first delivery attempt */ | |
2168 | ||
2169 | case ECOND_FIRST_DELIVERY: | |
2170 | if (yield != NULL) *yield = deliver_firsttime == testfor; | |
2171 | return s; | |
2172 | ||
2173 | ||
2174 | /* queue_running tests for any process started by a queue runner */ | |
2175 | ||
2176 | case ECOND_QUEUE_RUNNING: | |
2177 | if (yield != NULL) *yield = (queue_run_pid != (pid_t)0) == testfor; | |
2178 | return s; | |
2179 | ||
2180 | ||
2181 | /* exists: tests for file existence | |
2182 | isip: tests for any IP address | |
2183 | isip4: tests for an IPv4 address | |
2184 | isip6: tests for an IPv6 address | |
2185 | pam: does PAM authentication | |
2186 | radius: does RADIUS authentication | |
2187 | ldapauth: does LDAP authentication | |
2188 | pwcheck: does Cyrus SASL pwcheck authentication | |
2189 | */ | |
2190 | ||
2191 | case ECOND_EXISTS: | |
2192 | case ECOND_ISIP: | |
2193 | case ECOND_ISIP4: | |
2194 | case ECOND_ISIP6: | |
2195 | case ECOND_PAM: | |
2196 | case ECOND_RADIUS: | |
2197 | case ECOND_LDAPAUTH: | |
2198 | case ECOND_PWCHECK: | |
2199 | ||
2200 | while (isspace(*s)) s++; | |
b5b871ac | 2201 | if (*s != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
059ec3d9 | 2202 | |
b0e85a8f | 2203 | sub[0] = expand_string_internal(s+1, TRUE, &s, yield == NULL, TRUE, resetok); |
059ec3d9 | 2204 | if (sub[0] == NULL) return NULL; |
b5b871ac | 2205 | /* {-for-text-editors */ |
059ec3d9 PH |
2206 | if (*s++ != '}') goto COND_FAILED_CURLY_END; |
2207 | ||
2208 | if (yield == NULL) return s; /* No need to run the test if skipping */ | |
2209 | ||
2210 | switch(cond_type) | |
2211 | { | |
2212 | case ECOND_EXISTS: | |
2213 | if ((expand_forbid & RDO_EXISTS) != 0) | |
2214 | { | |
2215 | expand_string_message = US"File existence tests are not permitted"; | |
2216 | return NULL; | |
2217 | } | |
2218 | *yield = (Ustat(sub[0], &statbuf) == 0) == testfor; | |
2219 | break; | |
2220 | ||
2221 | case ECOND_ISIP: | |
2222 | case ECOND_ISIP4: | |
2223 | case ECOND_ISIP6: | |
2224 | rc = string_is_ip_address(sub[0], NULL); | |
7e66e54d | 2225 | *yield = ((cond_type == ECOND_ISIP)? (rc != 0) : |
059ec3d9 PH |
2226 | (cond_type == ECOND_ISIP4)? (rc == 4) : (rc == 6)) == testfor; |
2227 | break; | |
2228 | ||
2229 | /* Various authentication tests - all optionally compiled */ | |
2230 | ||
2231 | case ECOND_PAM: | |
2232 | #ifdef SUPPORT_PAM | |
2233 | rc = auth_call_pam(sub[0], &expand_string_message); | |
2234 | goto END_AUTH; | |
2235 | #else | |
2236 | goto COND_FAILED_NOT_COMPILED; | |
2237 | #endif /* SUPPORT_PAM */ | |
2238 | ||
2239 | case ECOND_RADIUS: | |
2240 | #ifdef RADIUS_CONFIG_FILE | |
2241 | rc = auth_call_radius(sub[0], &expand_string_message); | |
2242 | goto END_AUTH; | |
2243 | #else | |
2244 | goto COND_FAILED_NOT_COMPILED; | |
2245 | #endif /* RADIUS_CONFIG_FILE */ | |
2246 | ||
2247 | case ECOND_LDAPAUTH: | |
2248 | #ifdef LOOKUP_LDAP | |
2249 | { | |
2250 | /* Just to keep the interface the same */ | |
2251 | BOOL do_cache; | |
2252 | int old_pool = store_pool; | |
2253 | store_pool = POOL_SEARCH; | |
2254 | rc = eldapauth_find((void *)(-1), NULL, sub[0], Ustrlen(sub[0]), NULL, | |
2255 | &expand_string_message, &do_cache); | |
2256 | store_pool = old_pool; | |
2257 | } | |
2258 | goto END_AUTH; | |
2259 | #else | |
2260 | goto COND_FAILED_NOT_COMPILED; | |
2261 | #endif /* LOOKUP_LDAP */ | |
2262 | ||
2263 | case ECOND_PWCHECK: | |
2264 | #ifdef CYRUS_PWCHECK_SOCKET | |
2265 | rc = auth_call_pwcheck(sub[0], &expand_string_message); | |
2266 | goto END_AUTH; | |
2267 | #else | |
2268 | goto COND_FAILED_NOT_COMPILED; | |
2269 | #endif /* CYRUS_PWCHECK_SOCKET */ | |
2270 | ||
2271 | #if defined(SUPPORT_PAM) || defined(RADIUS_CONFIG_FILE) || \ | |
2272 | defined(LOOKUP_LDAP) || defined(CYRUS_PWCHECK_SOCKET) | |
2273 | END_AUTH: | |
2274 | if (rc == ERROR || rc == DEFER) return NULL; | |
2275 | *yield = (rc == OK) == testfor; | |
2276 | #endif | |
2277 | } | |
2278 | return s; | |
2279 | ||
2280 | ||
333eea9c JH |
2281 | /* call ACL (in a conditional context). Accept true, deny false. |
2282 | Defer is a forced-fail. Anything set by message= goes to $value. | |
f60d98e8 JH |
2283 | Up to ten parameters are used; we use the braces round the name+args |
2284 | like the saslauthd condition does, to permit a variable number of args. | |
2285 | See also the expansion-item version EITEM_ACL and the traditional | |
2286 | acl modifier ACLC_ACL. | |
fd5dad68 JH |
2287 | Since the ACL may allocate new global variables, tell our caller to not |
2288 | reclaim memory. | |
f60d98e8 | 2289 | */ |
333eea9c JH |
2290 | |
2291 | case ECOND_ACL: | |
bef3ea7f | 2292 | /* ${if acl {{name}{arg1}{arg2}...} {yes}{no}} */ |
333eea9c | 2293 | { |
333eea9c | 2294 | uschar *user_msg; |
333eea9c | 2295 | BOOL cond = FALSE; |
bef3ea7f JH |
2296 | int size = 0; |
2297 | int ptr = 0; | |
333eea9c JH |
2298 | |
2299 | while (isspace(*s)) s++; | |
6d9cfc47 | 2300 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /*}*/ |
333eea9c | 2301 | |
f60d98e8 | 2302 | switch(read_subs(sub, sizeof(sub)/sizeof(*sub), 1, |
b0e85a8f | 2303 | &s, yield == NULL, TRUE, US"acl", resetok)) |
333eea9c | 2304 | { |
f60d98e8 JH |
2305 | case 1: expand_string_message = US"too few arguments or bracketing " |
2306 | "error for acl"; | |
2307 | case 2: | |
2308 | case 3: return NULL; | |
333eea9c | 2309 | } |
f60d98e8 | 2310 | |
b0e85a8f | 2311 | *resetok = FALSE; |
bef3ea7f | 2312 | if (yield != NULL) switch(eval_acl(sub, sizeof(sub)/sizeof(*sub), &user_msg)) |
f60d98e8 JH |
2313 | { |
2314 | case OK: | |
2315 | cond = TRUE; | |
2316 | case FAIL: | |
bef3ea7f | 2317 | lookup_value = NULL; |
f60d98e8 | 2318 | if (user_msg) |
bef3ea7f | 2319 | { |
f60d98e8 | 2320 | lookup_value = string_cat(NULL, &size, &ptr, user_msg, Ustrlen(user_msg)); |
bef3ea7f JH |
2321 | lookup_value[ptr] = '\0'; |
2322 | } | |
b5b871ac | 2323 | *yield = cond == testfor; |
f60d98e8 JH |
2324 | break; |
2325 | ||
2326 | case DEFER: | |
2327 | expand_string_forcedfail = TRUE; | |
2328 | default: | |
2329 | expand_string_message = string_sprintf("error from acl \"%s\"", sub[0]); | |
2330 | return NULL; | |
2331 | } | |
2332 | return s; | |
333eea9c | 2333 | } |
333eea9c JH |
2334 | |
2335 | ||
059ec3d9 PH |
2336 | /* saslauthd: does Cyrus saslauthd authentication. Four parameters are used: |
2337 | ||
b0e85a8f | 2338 | ${if saslauthd {{username}{password}{service}{realm}} {yes}{no}} |
059ec3d9 PH |
2339 | |
2340 | However, the last two are optional. That is why the whole set is enclosed | |
333eea9c | 2341 | in their own set of braces. */ |
059ec3d9 PH |
2342 | |
2343 | case ECOND_SASLAUTHD: | |
2344 | #ifndef CYRUS_SASLAUTHD_SOCKET | |
2345 | goto COND_FAILED_NOT_COMPILED; | |
2346 | #else | |
2347 | while (isspace(*s)) s++; | |
b5b871ac | 2348 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
b0e85a8f | 2349 | switch(read_subs(sub, 4, 2, &s, yield == NULL, TRUE, US"saslauthd", resetok)) |
059ec3d9 PH |
2350 | { |
2351 | case 1: expand_string_message = US"too few arguments or bracketing " | |
2352 | "error for saslauthd"; | |
2353 | case 2: | |
2354 | case 3: return NULL; | |
2355 | } | |
2356 | if (sub[2] == NULL) sub[3] = NULL; /* realm if no service */ | |
2357 | if (yield != NULL) | |
2358 | { | |
2359 | int rc; | |
2360 | rc = auth_call_saslauthd(sub[0], sub[1], sub[2], sub[3], | |
2361 | &expand_string_message); | |
2362 | if (rc == ERROR || rc == DEFER) return NULL; | |
2363 | *yield = (rc == OK) == testfor; | |
2364 | } | |
2365 | return s; | |
2366 | #endif /* CYRUS_SASLAUTHD_SOCKET */ | |
2367 | ||
2368 | ||
2369 | /* symbolic operators for numeric and string comparison, and a number of | |
2370 | other operators, all requiring two arguments. | |
2371 | ||
76dca828 PP |
2372 | crypteq: encrypts plaintext and compares against an encrypted text, |
2373 | using crypt(), crypt16(), MD5 or SHA-1 | |
2374 | inlist/inlisti: checks if first argument is in the list of the second | |
059ec3d9 PH |
2375 | match: does a regular expression match and sets up the numerical |
2376 | variables if it succeeds | |
2377 | match_address: matches in an address list | |
2378 | match_domain: matches in a domain list | |
32d668a5 | 2379 | match_ip: matches a host list that is restricted to IP addresses |
059ec3d9 | 2380 | match_local_part: matches in a local part list |
059ec3d9 PH |
2381 | */ |
2382 | ||
059ec3d9 PH |
2383 | case ECOND_MATCH_ADDRESS: |
2384 | case ECOND_MATCH_DOMAIN: | |
32d668a5 | 2385 | case ECOND_MATCH_IP: |
059ec3d9 | 2386 | case ECOND_MATCH_LOCAL_PART: |
da6dbe26 PP |
2387 | #ifndef EXPAND_LISTMATCH_RHS |
2388 | sub2_honour_dollar = FALSE; | |
2389 | #endif | |
2390 | /* FALLTHROUGH */ | |
2391 | ||
2392 | case ECOND_CRYPTEQ: | |
2393 | case ECOND_INLIST: | |
2394 | case ECOND_INLISTI: | |
2395 | case ECOND_MATCH: | |
059ec3d9 PH |
2396 | |
2397 | case ECOND_NUM_L: /* Numerical comparisons */ | |
2398 | case ECOND_NUM_LE: | |
2399 | case ECOND_NUM_E: | |
2400 | case ECOND_NUM_EE: | |
2401 | case ECOND_NUM_G: | |
2402 | case ECOND_NUM_GE: | |
2403 | ||
2404 | case ECOND_STR_LT: /* String comparisons */ | |
2405 | case ECOND_STR_LTI: | |
2406 | case ECOND_STR_LE: | |
2407 | case ECOND_STR_LEI: | |
2408 | case ECOND_STR_EQ: | |
2409 | case ECOND_STR_EQI: | |
2410 | case ECOND_STR_GT: | |
2411 | case ECOND_STR_GTI: | |
2412 | case ECOND_STR_GE: | |
2413 | case ECOND_STR_GEI: | |
2414 | ||
2415 | for (i = 0; i < 2; i++) | |
2416 | { | |
da6dbe26 PP |
2417 | /* Sometimes, we don't expand substrings; too many insecure configurations |
2418 | created using match_address{}{} and friends, where the second param | |
2419 | includes information from untrustworthy sources. */ | |
2420 | BOOL honour_dollar = TRUE; | |
2421 | if ((i > 0) && !sub2_honour_dollar) | |
2422 | honour_dollar = FALSE; | |
2423 | ||
059ec3d9 PH |
2424 | while (isspace(*s)) s++; |
2425 | if (*s != '{') | |
2426 | { | |
2427 | if (i == 0) goto COND_FAILED_CURLY_START; | |
2428 | expand_string_message = string_sprintf("missing 2nd string in {} " | |
2429 | "after \"%s\"", name); | |
2430 | return NULL; | |
2431 | } | |
da6dbe26 | 2432 | sub[i] = expand_string_internal(s+1, TRUE, &s, yield == NULL, |
b0e85a8f | 2433 | honour_dollar, resetok); |
059ec3d9 PH |
2434 | if (sub[i] == NULL) return NULL; |
2435 | if (*s++ != '}') goto COND_FAILED_CURLY_END; | |
2436 | ||
2437 | /* Convert to numerical if required; we know that the names of all the | |
2438 | conditions that compare numbers do not start with a letter. This just saves | |
2439 | checking for them individually. */ | |
2440 | ||
d6066548 | 2441 | if (!isalpha(name[0]) && yield != NULL) |
059ec3d9 | 2442 | { |
5dd1517f PH |
2443 | if (sub[i][0] == 0) |
2444 | { | |
2445 | num[i] = 0; | |
2446 | DEBUG(D_expand) | |
2447 | debug_printf("empty string cast to zero for numerical comparison\n"); | |
2448 | } | |
2449 | else | |
2450 | { | |
7685ce68 | 2451 | num[i] = expanded_string_integer(sub[i], FALSE); |
5dd1517f PH |
2452 | if (expand_string_message != NULL) return NULL; |
2453 | } | |
059ec3d9 PH |
2454 | } |
2455 | } | |
2456 | ||
2457 | /* Result not required */ | |
2458 | ||
2459 | if (yield == NULL) return s; | |
2460 | ||
2461 | /* Do an appropriate comparison */ | |
2462 | ||
2463 | switch(cond_type) | |
2464 | { | |
2465 | case ECOND_NUM_E: | |
2466 | case ECOND_NUM_EE: | |
b5b871ac | 2467 | tempcond = (num[0] == num[1]); |
059ec3d9 PH |
2468 | break; |
2469 | ||
2470 | case ECOND_NUM_G: | |
b5b871ac | 2471 | tempcond = (num[0] > num[1]); |
059ec3d9 PH |
2472 | break; |
2473 | ||
2474 | case ECOND_NUM_GE: | |
b5b871ac | 2475 | tempcond = (num[0] >= num[1]); |
059ec3d9 PH |
2476 | break; |
2477 | ||
2478 | case ECOND_NUM_L: | |
b5b871ac | 2479 | tempcond = (num[0] < num[1]); |
059ec3d9 PH |
2480 | break; |
2481 | ||
2482 | case ECOND_NUM_LE: | |
b5b871ac | 2483 | tempcond = (num[0] <= num[1]); |
059ec3d9 PH |
2484 | break; |
2485 | ||
2486 | case ECOND_STR_LT: | |
b5b871ac | 2487 | tempcond = (Ustrcmp(sub[0], sub[1]) < 0); |
059ec3d9 PH |
2488 | break; |
2489 | ||
2490 | case ECOND_STR_LTI: | |
b5b871ac | 2491 | tempcond = (strcmpic(sub[0], sub[1]) < 0); |
059ec3d9 PH |
2492 | break; |
2493 | ||
2494 | case ECOND_STR_LE: | |
b5b871ac | 2495 | tempcond = (Ustrcmp(sub[0], sub[1]) <= 0); |
059ec3d9 PH |
2496 | break; |
2497 | ||
2498 | case ECOND_STR_LEI: | |
b5b871ac | 2499 | tempcond = (strcmpic(sub[0], sub[1]) <= 0); |
059ec3d9 PH |
2500 | break; |
2501 | ||
2502 | case ECOND_STR_EQ: | |
b5b871ac | 2503 | tempcond = (Ustrcmp(sub[0], sub[1]) == 0); |
059ec3d9 PH |
2504 | break; |
2505 | ||
2506 | case ECOND_STR_EQI: | |
b5b871ac | 2507 | tempcond = (strcmpic(sub[0], sub[1]) == 0); |
059ec3d9 PH |
2508 | break; |
2509 | ||
2510 | case ECOND_STR_GT: | |
b5b871ac | 2511 | tempcond = (Ustrcmp(sub[0], sub[1]) > 0); |
059ec3d9 PH |
2512 | break; |
2513 | ||
2514 | case ECOND_STR_GTI: | |
b5b871ac | 2515 | tempcond = (strcmpic(sub[0], sub[1]) > 0); |
059ec3d9 PH |
2516 | break; |
2517 | ||
2518 | case ECOND_STR_GE: | |
b5b871ac | 2519 | tempcond = (Ustrcmp(sub[0], sub[1]) >= 0); |
059ec3d9 PH |
2520 | break; |
2521 | ||
2522 | case ECOND_STR_GEI: | |
b5b871ac | 2523 | tempcond = (strcmpic(sub[0], sub[1]) >= 0); |
059ec3d9 PH |
2524 | break; |
2525 | ||
2526 | case ECOND_MATCH: /* Regular expression match */ | |
2527 | re = pcre_compile(CS sub[1], PCRE_COPT, (const char **)&rerror, &roffset, | |
2528 | NULL); | |
2529 | if (re == NULL) | |
2530 | { | |
2531 | expand_string_message = string_sprintf("regular expression error in " | |
2532 | "\"%s\": %s at offset %d", sub[1], rerror, roffset); | |
2533 | return NULL; | |
2534 | } | |
b5b871ac | 2535 | tempcond = regex_match_and_setup(re, sub[0], 0, -1); |
059ec3d9 PH |
2536 | break; |
2537 | ||
2538 | case ECOND_MATCH_ADDRESS: /* Match in an address list */ | |
2539 | rc = match_address_list(sub[0], TRUE, FALSE, &(sub[1]), NULL, -1, 0, NULL); | |
2540 | goto MATCHED_SOMETHING; | |
2541 | ||
2542 | case ECOND_MATCH_DOMAIN: /* Match in a domain list */ | |
2543 | rc = match_isinlist(sub[0], &(sub[1]), 0, &domainlist_anchor, NULL, | |
2544 | MCL_DOMAIN + MCL_NOEXPAND, TRUE, NULL); | |
2545 | goto MATCHED_SOMETHING; | |
2546 | ||
32d668a5 | 2547 | case ECOND_MATCH_IP: /* Match IP address in a host list */ |
7e66e54d | 2548 | if (sub[0][0] != 0 && string_is_ip_address(sub[0], NULL) == 0) |
32d668a5 PH |
2549 | { |
2550 | expand_string_message = string_sprintf("\"%s\" is not an IP address", | |
2551 | sub[0]); | |
2552 | return NULL; | |
2553 | } | |
2554 | else | |
2555 | { | |
2556 | unsigned int *nullcache = NULL; | |
2557 | check_host_block cb; | |
2558 | ||
2559 | cb.host_name = US""; | |
2560 | cb.host_address = sub[0]; | |
2561 | ||
2562 | /* If the host address starts off ::ffff: it is an IPv6 address in | |
2563 | IPv4-compatible mode. Find the IPv4 part for checking against IPv4 | |
2564 | addresses. */ | |
2565 | ||
2566 | cb.host_ipv4 = (Ustrncmp(cb.host_address, "::ffff:", 7) == 0)? | |
2567 | cb.host_address + 7 : cb.host_address; | |
2568 | ||
2569 | rc = match_check_list( | |
2570 | &sub[1], /* the list */ | |
2571 | 0, /* separator character */ | |
2572 | &hostlist_anchor, /* anchor pointer */ | |
2573 | &nullcache, /* cache pointer */ | |
2574 | check_host, /* function for testing */ | |
2575 | &cb, /* argument for function */ | |
2576 | MCL_HOST, /* type of check */ | |
2577 | sub[0], /* text for debugging */ | |
2578 | NULL); /* where to pass back data */ | |
2579 | } | |
2580 | goto MATCHED_SOMETHING; | |
2581 | ||
059ec3d9 PH |
2582 | case ECOND_MATCH_LOCAL_PART: |
2583 | rc = match_isinlist(sub[0], &(sub[1]), 0, &localpartlist_anchor, NULL, | |
2584 | MCL_LOCALPART + MCL_NOEXPAND, TRUE, NULL); | |
2585 | /* Fall through */ | |
9a26b6b2 | 2586 | /* VVVVVVVVVVVV */ |
059ec3d9 PH |
2587 | MATCHED_SOMETHING: |
2588 | switch(rc) | |
2589 | { | |
2590 | case OK: | |
b5b871ac | 2591 | tempcond = TRUE; |
059ec3d9 PH |
2592 | break; |
2593 | ||
2594 | case FAIL: | |
b5b871ac | 2595 | tempcond = FALSE; |
059ec3d9 PH |
2596 | break; |
2597 | ||
2598 | case DEFER: | |
2599 | expand_string_message = string_sprintf("unable to complete match " | |
2600 | "against \"%s\": %s", sub[1], search_error_message); | |
2601 | return NULL; | |
2602 | } | |
2603 | ||
2604 | break; | |
2605 | ||
2606 | /* Various "encrypted" comparisons. If the second string starts with | |
2607 | "{" then an encryption type is given. Default to crypt() or crypt16() | |
2608 | (build-time choice). */ | |
b5b871ac | 2609 | /* }-for-text-editors */ |
059ec3d9 PH |
2610 | |
2611 | case ECOND_CRYPTEQ: | |
2612 | #ifndef SUPPORT_CRYPTEQ | |
2613 | goto COND_FAILED_NOT_COMPILED; | |
2614 | #else | |
2615 | if (strncmpic(sub[1], US"{md5}", 5) == 0) | |
2616 | { | |
2617 | int sublen = Ustrlen(sub[1]+5); | |
2618 | md5 base; | |
2619 | uschar digest[16]; | |
2620 | ||
2621 | md5_start(&base); | |
2622 | md5_end(&base, (uschar *)sub[0], Ustrlen(sub[0]), digest); | |
2623 | ||
2624 | /* If the length that we are comparing against is 24, the MD5 digest | |
2625 | is expressed as a base64 string. This is the way LDAP does it. However, | |
2626 | some other software uses a straightforward hex representation. We assume | |
2627 | this if the length is 32. Other lengths fail. */ | |
2628 | ||
2629 | if (sublen == 24) | |
2630 | { | |
2631 | uschar *coded = auth_b64encode((uschar *)digest, 16); | |
2632 | DEBUG(D_auth) debug_printf("crypteq: using MD5+B64 hashing\n" | |
2633 | " subject=%s\n crypted=%s\n", coded, sub[1]+5); | |
b5b871ac | 2634 | tempcond = (Ustrcmp(coded, sub[1]+5) == 0); |
059ec3d9 PH |
2635 | } |
2636 | else if (sublen == 32) | |
2637 | { | |
2638 | int i; | |
2639 | uschar coded[36]; | |
2640 | for (i = 0; i < 16; i++) sprintf(CS (coded+2*i), "%02X", digest[i]); | |
2641 | coded[32] = 0; | |
2642 | DEBUG(D_auth) debug_printf("crypteq: using MD5+hex hashing\n" | |
2643 | " subject=%s\n crypted=%s\n", coded, sub[1]+5); | |
b5b871ac | 2644 | tempcond = (strcmpic(coded, sub[1]+5) == 0); |
059ec3d9 PH |
2645 | } |
2646 | else | |
2647 | { | |
2648 | DEBUG(D_auth) debug_printf("crypteq: length for MD5 not 24 or 32: " | |
2649 | "fail\n crypted=%s\n", sub[1]+5); | |
b5b871ac | 2650 | tempcond = FALSE; |
059ec3d9 PH |
2651 | } |
2652 | } | |
2653 | ||
2654 | else if (strncmpic(sub[1], US"{sha1}", 6) == 0) | |
2655 | { | |
2656 | int sublen = Ustrlen(sub[1]+6); | |
2657 | sha1 base; | |
2658 | uschar digest[20]; | |
2659 | ||
2660 | sha1_start(&base); | |
2661 | sha1_end(&base, (uschar *)sub[0], Ustrlen(sub[0]), digest); | |
2662 | ||
2663 | /* If the length that we are comparing against is 28, assume the SHA1 | |
2664 | digest is expressed as a base64 string. If the length is 40, assume a | |
2665 | straightforward hex representation. Other lengths fail. */ | |
2666 | ||
2667 | if (sublen == 28) | |
2668 | { | |
2669 | uschar *coded = auth_b64encode((uschar *)digest, 20); | |
2670 | DEBUG(D_auth) debug_printf("crypteq: using SHA1+B64 hashing\n" | |
2671 | " subject=%s\n crypted=%s\n", coded, sub[1]+6); | |
b5b871ac | 2672 | tempcond = (Ustrcmp(coded, sub[1]+6) == 0); |
059ec3d9 PH |
2673 | } |
2674 | else if (sublen == 40) | |
2675 | { | |
2676 | int i; | |
2677 | uschar coded[44]; | |
2678 | for (i = 0; i < 20; i++) sprintf(CS (coded+2*i), "%02X", digest[i]); | |
2679 | coded[40] = 0; | |
2680 | DEBUG(D_auth) debug_printf("crypteq: using SHA1+hex hashing\n" | |
2681 | " subject=%s\n crypted=%s\n", coded, sub[1]+6); | |
b5b871ac | 2682 | tempcond = (strcmpic(coded, sub[1]+6) == 0); |
059ec3d9 PH |
2683 | } |
2684 | else | |
2685 | { | |
2686 | DEBUG(D_auth) debug_printf("crypteq: length for SHA-1 not 28 or 40: " | |
2687 | "fail\n crypted=%s\n", sub[1]+6); | |
b5b871ac | 2688 | tempcond = FALSE; |
059ec3d9 PH |
2689 | } |
2690 | } | |
2691 | ||
2692 | else /* {crypt} or {crypt16} and non-{ at start */ | |
76dca828 | 2693 | /* }-for-text-editors */ |
059ec3d9 PH |
2694 | { |
2695 | int which = 0; | |
2696 | uschar *coded; | |
2697 | ||
2698 | if (strncmpic(sub[1], US"{crypt}", 7) == 0) | |
2699 | { | |
2700 | sub[1] += 7; | |
2701 | which = 1; | |
2702 | } | |
2703 | else if (strncmpic(sub[1], US"{crypt16}", 9) == 0) | |
2704 | { | |
2705 | sub[1] += 9; | |
2706 | which = 2; | |
2707 | } | |
b5b871ac | 2708 | else if (sub[1][0] == '{') /* }-for-text-editors */ |
059ec3d9 PH |
2709 | { |
2710 | expand_string_message = string_sprintf("unknown encryption mechanism " | |
2711 | "in \"%s\"", sub[1]); | |
2712 | return NULL; | |
2713 | } | |
2714 | ||
2715 | switch(which) | |
2716 | { | |
2717 | case 0: coded = US DEFAULT_CRYPT(CS sub[0], CS sub[1]); break; | |
2718 | case 1: coded = US crypt(CS sub[0], CS sub[1]); break; | |
2719 | default: coded = US crypt16(CS sub[0], CS sub[1]); break; | |
2720 | } | |
2721 | ||
2722 | #define STR(s) # s | |
2723 | #define XSTR(s) STR(s) | |
2724 | DEBUG(D_auth) debug_printf("crypteq: using %s()\n" | |
2725 | " subject=%s\n crypted=%s\n", | |
2726 | (which == 0)? XSTR(DEFAULT_CRYPT) : (which == 1)? "crypt" : "crypt16", | |
2727 | coded, sub[1]); | |
2728 | #undef STR | |
2729 | #undef XSTR | |
2730 | ||
2731 | /* If the encrypted string contains fewer than two characters (for the | |
2732 | salt), force failure. Otherwise we get false positives: with an empty | |
2733 | string the yield of crypt() is an empty string! */ | |
2734 | ||
b5b871ac JH |
2735 | tempcond = (Ustrlen(sub[1]) < 2)? FALSE : |
2736 | (Ustrcmp(coded, sub[1]) == 0); | |
059ec3d9 PH |
2737 | } |
2738 | break; | |
2739 | #endif /* SUPPORT_CRYPTEQ */ | |
76dca828 PP |
2740 | |
2741 | case ECOND_INLIST: | |
2742 | case ECOND_INLISTI: | |
2743 | { | |
2744 | int sep = 0; | |
76dca828 PP |
2745 | uschar *save_iterate_item = iterate_item; |
2746 | int (*compare)(const uschar *, const uschar *); | |
2747 | ||
b5b871ac | 2748 | tempcond = FALSE; |
76dca828 PP |
2749 | if (cond_type == ECOND_INLISTI) |
2750 | compare = strcmpic; | |
2751 | else | |
2752 | compare = (int (*)(const uschar *, const uschar *)) strcmp; | |
2753 | ||
2754 | while ((iterate_item = string_nextinlist(&sub[1], &sep, NULL, 0)) != NULL) | |
2755 | if (compare(sub[0], iterate_item) == 0) | |
2756 | { | |
b5b871ac | 2757 | tempcond = TRUE; |
76dca828 PP |
2758 | break; |
2759 | } | |
2760 | iterate_item = save_iterate_item; | |
76dca828 PP |
2761 | } |
2762 | ||
059ec3d9 PH |
2763 | } /* Switch for comparison conditions */ |
2764 | ||
b5b871ac | 2765 | *yield = tempcond == testfor; |
059ec3d9 PH |
2766 | return s; /* End of comparison conditions */ |
2767 | ||
2768 | ||
2769 | /* and/or: computes logical and/or of several conditions */ | |
2770 | ||
2771 | case ECOND_AND: | |
2772 | case ECOND_OR: | |
2773 | subcondptr = (yield == NULL)? NULL : &tempcond; | |
2774 | combined_cond = (cond_type == ECOND_AND); | |
2775 | ||
2776 | while (isspace(*s)) s++; | |
b5b871ac | 2777 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
059ec3d9 PH |
2778 | |
2779 | for (;;) | |
2780 | { | |
2781 | while (isspace(*s)) s++; | |
b5b871ac | 2782 | /* {-for-text-editors */ |
059ec3d9 | 2783 | if (*s == '}') break; |
b5b871ac | 2784 | if (*s != '{') /* }-for-text-editors */ |
059ec3d9 PH |
2785 | { |
2786 | expand_string_message = string_sprintf("each subcondition " | |
2787 | "inside an \"%s{...}\" condition must be in its own {}", name); | |
2788 | return NULL; | |
2789 | } | |
2790 | ||
b0e85a8f | 2791 | if (!(s = eval_condition(s+1, resetok, subcondptr))) |
059ec3d9 PH |
2792 | { |
2793 | expand_string_message = string_sprintf("%s inside \"%s{...}\" condition", | |
2794 | expand_string_message, name); | |
2795 | return NULL; | |
2796 | } | |
2797 | while (isspace(*s)) s++; | |
2798 | ||
b5b871ac | 2799 | /* {-for-text-editors */ |
059ec3d9 PH |
2800 | if (*s++ != '}') |
2801 | { | |
b5b871ac | 2802 | /* {-for-text-editors */ |
059ec3d9 PH |
2803 | expand_string_message = string_sprintf("missing } at end of condition " |
2804 | "inside \"%s\" group", name); | |
2805 | return NULL; | |
2806 | } | |
2807 | ||
2808 | if (yield != NULL) | |
2809 | { | |
2810 | if (cond_type == ECOND_AND) | |
2811 | { | |
2812 | combined_cond &= tempcond; | |
2813 | if (!combined_cond) subcondptr = NULL; /* once false, don't */ | |
2814 | } /* evaluate any more */ | |
2815 | else | |
2816 | { | |
2817 | combined_cond |= tempcond; | |
2818 | if (combined_cond) subcondptr = NULL; /* once true, don't */ | |
2819 | } /* evaluate any more */ | |
2820 | } | |
2821 | } | |
2822 | ||
2823 | if (yield != NULL) *yield = (combined_cond == testfor); | |
2824 | return ++s; | |
2825 | ||
2826 | ||
0ce9abe6 PH |
2827 | /* forall/forany: iterates a condition with different values */ |
2828 | ||
2829 | case ECOND_FORALL: | |
2830 | case ECOND_FORANY: | |
2831 | { | |
2832 | int sep = 0; | |
282b357d | 2833 | uschar *save_iterate_item = iterate_item; |
0ce9abe6 PH |
2834 | |
2835 | while (isspace(*s)) s++; | |
b5b871ac | 2836 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
b0e85a8f | 2837 | sub[0] = expand_string_internal(s, TRUE, &s, (yield == NULL), TRUE, resetok); |
0ce9abe6 | 2838 | if (sub[0] == NULL) return NULL; |
b5b871ac | 2839 | /* {-for-text-editors */ |
0ce9abe6 PH |
2840 | if (*s++ != '}') goto COND_FAILED_CURLY_END; |
2841 | ||
2842 | while (isspace(*s)) s++; | |
b5b871ac | 2843 | if (*s++ != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
0ce9abe6 PH |
2844 | |
2845 | sub[1] = s; | |
2846 | ||
2847 | /* Call eval_condition once, with result discarded (as if scanning a | |
2848 | "false" part). This allows us to find the end of the condition, because if | |
2849 | the list it empty, we won't actually evaluate the condition for real. */ | |
2850 | ||
b0e85a8f | 2851 | if (!(s = eval_condition(sub[1], resetok, NULL))) |
0ce9abe6 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 */ |
0ce9abe6 PH |
2860 | if (*s++ != '}') |
2861 | { | |
b5b871ac | 2862 | /* {-for-text-editors */ |
0ce9abe6 PH |
2863 | expand_string_message = string_sprintf("missing } at end of condition " |
2864 | "inside \"%s\"", name); | |
2865 | return NULL; | |
2866 | } | |
2867 | ||
2868 | if (yield != NULL) *yield = !testfor; | |
2869 | while ((iterate_item = string_nextinlist(&sub[0], &sep, NULL, 0)) != NULL) | |
2870 | { | |
2871 | DEBUG(D_expand) debug_printf("%s: $item = \"%s\"\n", name, iterate_item); | |
b0e85a8f | 2872 | if (!eval_condition(sub[1], resetok, &tempcond)) |
0ce9abe6 PH |
2873 | { |
2874 | expand_string_message = string_sprintf("%s inside \"%s\" condition", | |
2875 | expand_string_message, name); | |
e58c13cc | 2876 | iterate_item = save_iterate_item; |
0ce9abe6 PH |
2877 | return NULL; |
2878 | } | |
2879 | DEBUG(D_expand) debug_printf("%s: condition evaluated to %s\n", name, | |
2880 | tempcond? "true":"false"); | |
2881 | ||
2882 | if (yield != NULL) *yield = (tempcond == testfor); | |
2883 | if (tempcond == (cond_type == ECOND_FORANY)) break; | |
2884 | } | |
2885 | ||
282b357d | 2886 | iterate_item = save_iterate_item; |
0ce9abe6 PH |
2887 | return s; |
2888 | } | |
2889 | ||
2890 | ||
f3766eb5 NM |
2891 | /* The bool{} expansion condition maps a string to boolean. |
2892 | The values supported should match those supported by the ACL condition | |
2893 | (acl.c, ACLC_CONDITION) so that we keep to a minimum the different ideas | |
2894 | of true/false. Note that Router "condition" rules have a different | |
2895 | interpretation, where general data can be used and only a few values | |
2896 | map to FALSE. | |
2897 | Note that readconf.c boolean matching, for boolean configuration options, | |
6a8de854 PP |
2898 | only matches true/yes/false/no. |
2899 | The bool_lax{} condition matches the Router logic, which is much more | |
2900 | liberal. */ | |
f3766eb5 | 2901 | case ECOND_BOOL: |
6a8de854 | 2902 | case ECOND_BOOL_LAX: |
f3766eb5 NM |
2903 | { |
2904 | uschar *sub_arg[1]; | |
71265ae9 | 2905 | uschar *t, *t2; |
6a8de854 | 2906 | uschar *ourname; |
f3766eb5 NM |
2907 | size_t len; |
2908 | BOOL boolvalue = FALSE; | |
2909 | while (isspace(*s)) s++; | |
b5b871ac | 2910 | if (*s != '{') goto COND_FAILED_CURLY_START; /* }-for-text-editors */ |
6a8de854 | 2911 | ourname = cond_type == ECOND_BOOL_LAX ? US"bool_lax" : US"bool"; |
b0e85a8f | 2912 | switch(read_subs(sub_arg, 1, 1, &s, yield == NULL, FALSE, ourname, resetok)) |
f3766eb5 | 2913 | { |
6a8de854 PP |
2914 | case 1: expand_string_message = string_sprintf( |
2915 | "too few arguments or bracketing error for %s", | |
2916 | ourname); | |
f3766eb5 NM |
2917 | /*FALLTHROUGH*/ |
2918 | case 2: | |
2919 | case 3: return NULL; | |
2920 | } | |
2921 | t = sub_arg[0]; | |
2922 | while (isspace(*t)) t++; | |
2923 | len = Ustrlen(t); | |
71265ae9 PP |
2924 | if (len) |
2925 | { | |
2926 | /* trailing whitespace: seems like a good idea to ignore it too */ | |
2927 | t2 = t + len - 1; | |
2928 | while (isspace(*t2)) t2--; | |
2929 | if (t2 != (t + len)) | |
2930 | { | |
2931 | *++t2 = '\0'; | |
2932 | len = t2 - t; | |
2933 | } | |
2934 | } | |
f3766eb5 | 2935 | DEBUG(D_expand) |
6a8de854 PP |
2936 | debug_printf("considering %s: %s\n", ourname, len ? t : US"<empty>"); |
2937 | /* logic for the lax case from expand_check_condition(), which also does | |
2938 | expands, and the logic is both short and stable enough that there should | |
2939 | be no maintenance burden from replicating it. */ | |
f3766eb5 NM |
2940 | if (len == 0) |
2941 | boolvalue = FALSE; | |
51c7471d JH |
2942 | else if (*t == '-' |
2943 | ? Ustrspn(t+1, "0123456789") == len-1 | |
2944 | : Ustrspn(t, "0123456789") == len) | |
6a8de854 | 2945 | { |
f3766eb5 | 2946 | boolvalue = (Uatoi(t) == 0) ? FALSE : TRUE; |
6a8de854 PP |
2947 | /* expand_check_condition only does a literal string "0" check */ |
2948 | if ((cond_type == ECOND_BOOL_LAX) && (len > 1)) | |
2949 | boolvalue = TRUE; | |
2950 | } | |
f3766eb5 NM |
2951 | else if (strcmpic(t, US"true") == 0 || strcmpic(t, US"yes") == 0) |
2952 | boolvalue = TRUE; | |
2953 | else if (strcmpic(t, US"false") == 0 || strcmpic(t, US"no") == 0) | |
2954 | boolvalue = FALSE; | |
6a8de854 PP |
2955 | else if (cond_type == ECOND_BOOL_LAX) |
2956 | boolvalue = TRUE; | |
f3766eb5 NM |
2957 | else |
2958 | { | |
2959 | expand_string_message = string_sprintf("unrecognised boolean " | |
2960 | "value \"%s\"", t); | |
2961 | return NULL; | |
2962 | } | |
5ee6f336 | 2963 | if (yield != NULL) *yield = (boolvalue == testfor); |
f3766eb5 NM |
2964 | return s; |
2965 | } | |
2966 | ||
059ec3d9 PH |
2967 | /* Unknown condition */ |
2968 | ||
2969 | default: | |
2970 | expand_string_message = string_sprintf("unknown condition \"%s\"", name); | |
2971 | return NULL; | |
2972 | } /* End switch on condition type */ | |
2973 | ||
2974 | /* Missing braces at start and end of data */ | |
2975 | ||
2976 | COND_FAILED_CURLY_START: | |
2977 | expand_string_message = string_sprintf("missing { after \"%s\"", name); | |
2978 | return NULL; | |
2979 | ||
2980 | COND_FAILED_CURLY_END: | |
2981 | expand_string_message = string_sprintf("missing } at end of \"%s\" condition", | |
2982 | name); | |
2983 | return NULL; | |
2984 | ||
2985 | /* A condition requires code that is not compiled */ | |
2986 | ||
2987 | #if !defined(SUPPORT_PAM) || !defined(RADIUS_CONFIG_FILE) || \ | |
2988 | !defined(LOOKUP_LDAP) || !defined(CYRUS_PWCHECK_SOCKET) || \ | |
2989 | !defined(SUPPORT_CRYPTEQ) || !defined(CYRUS_SASLAUTHD_SOCKET) | |
2990 | COND_FAILED_NOT_COMPILED: | |
2991 | expand_string_message = string_sprintf("support for \"%s\" not compiled", | |
2992 | name); | |
2993 | return NULL; | |
2994 | #endif | |
2995 | } | |
2996 | ||
2997 | ||
2998 | ||
2999 | ||
3000 | /************************************************* | |
3001 | * Save numerical variables * | |
3002 | *************************************************/ | |
3003 | ||
3004 | /* This function is called from items such as "if" that want to preserve and | |
3005 | restore the numbered variables. | |
3006 | ||
3007 | Arguments: | |
3008 | save_expand_string points to an array of pointers to set | |
3009 | save_expand_nlength points to an array of ints for the lengths | |
3010 | ||
3011 | Returns: the value of expand max to save | |
3012 | */ | |
3013 | ||
3014 | static int | |
3015 | save_expand_strings(uschar **save_expand_nstring, int *save_expand_nlength) | |
3016 | { | |
3017 | int i; | |
3018 | for (i = 0; i <= expand_nmax; i++) | |
3019 | { | |
3020 | save_expand_nstring[i] = expand_nstring[i]; | |
3021 | save_expand_nlength[i] = expand_nlength[i]; | |
3022 | } | |
3023 | return expand_nmax; | |
3024 | } | |
3025 | ||
3026 | ||
3027 | ||
3028 | /************************************************* | |
3029 | * Restore numerical variables * | |
3030 | *************************************************/ | |
3031 | ||
3032 | /* This function restored saved values of numerical strings. | |
3033 | ||
3034 | Arguments: | |
3035 | save_expand_nmax the number of strings to restore | |
3036 | save_expand_string points to an array of pointers | |
3037 | save_expand_nlength points to an array of ints | |
3038 | ||
3039 | Returns: nothing | |
3040 | */ | |
3041 | ||
3042 | static void | |
3043 | restore_expand_strings(int save_expand_nmax, uschar **save_expand_nstring, | |
3044 | int *save_expand_nlength) | |
3045 | { | |
3046 | int i; | |
3047 | expand_nmax = save_expand_nmax; | |
3048 | for (i = 0; i <= expand_nmax; i++) | |
3049 | { | |
3050 | expand_nstring[i] = save_expand_nstring[i]; | |
3051 | expand_nlength[i] = save_expand_nlength[i]; | |
3052 | } | |
3053 | } | |
3054 | ||
3055 | ||
3056 | ||
3057 | ||
3058 | ||
3059 | /************************************************* | |
3060 | * Handle yes/no substrings * | |
3061 | *************************************************/ | |
3062 | ||
3063 | /* This function is used by ${if}, ${lookup} and ${extract} to handle the | |
3064 | alternative substrings that depend on whether or not the condition was true, | |
3065 | or the lookup or extraction succeeded. The substrings always have to be | |
3066 | expanded, to check their syntax, but "skipping" is set when the result is not | |
3067 | needed - this avoids unnecessary nested lookups. | |
3068 | ||
3069 | Arguments: | |
3070 | skipping TRUE if we were skipping when this item was reached | |
3071 | yes TRUE if the first string is to be used, else use the second | |
3072 | save_lookup a value to put back into lookup_value before the 2nd expansion | |
3073 | sptr points to the input string pointer | |
3074 | yieldptr points to the output string pointer | |
3075 | sizeptr points to the output string size | |
3076 | ptrptr points to the output string pointer | |
3077 | type "lookup" or "if" or "extract" or "run", for error message | |
b0e85a8f JH |
3078 | resetok if not NULL, pointer to flag - write FALSE if unsafe to reset |
3079 | the store. | |
059ec3d9 PH |
3080 | |
3081 | Returns: 0 OK; lookup_value has been reset to save_lookup | |
3082 | 1 expansion failed | |
3083 | 2 expansion failed because of bracketing error | |
3084 | */ | |
3085 | ||
3086 | static int | |
3087 | process_yesno(BOOL skipping, BOOL yes, uschar *save_lookup, uschar **sptr, | |
b0e85a8f | 3088 | uschar **yieldptr, int *sizeptr, int *ptrptr, uschar *type, BOOL *resetok) |
059ec3d9 PH |
3089 | { |
3090 | int rc = 0; | |
3091 | uschar *s = *sptr; /* Local value */ | |
3092 | uschar *sub1, *sub2; | |
3093 | ||
3094 | /* If there are no following strings, we substitute the contents of $value for | |
063b1e99 | 3095 | lookups and for extractions in the success case. For the ${if item, the string |
8e669ac1 | 3096 | "true" is substituted. In the fail case, nothing is substituted for all three |
063b1e99 | 3097 | items. */ |
059ec3d9 PH |
3098 | |
3099 | while (isspace(*s)) s++; | |
3100 | if (*s == '}') | |
3101 | { | |
063b1e99 PH |
3102 | if (type[0] == 'i') |
3103 | { | |
8e669ac1 | 3104 | if (yes) *yieldptr = string_cat(*yieldptr, sizeptr, ptrptr, US"true", 4); |
063b1e99 PH |
3105 | } |
3106 | else | |
8e669ac1 | 3107 | { |
063b1e99 PH |
3108 | if (yes && lookup_value != NULL) |
3109 | *yieldptr = string_cat(*yieldptr, sizeptr, ptrptr, lookup_value, | |
3110 | Ustrlen(lookup_value)); | |
3111 | lookup_value = save_lookup; | |
3112 | } | |
059ec3d9 PH |
3113 | s++; |
3114 | goto RETURN; | |
3115 | } | |
3116 | ||
9b4768fa PH |
3117 | /* The first following string must be braced. */ |
3118 | ||
3119 | if (*s++ != '{') goto FAILED_CURLY; | |
3120 | ||
059ec3d9 PH |
3121 | /* Expand the first substring. Forced failures are noticed only if we actually |
3122 | want this string. Set skipping in the call in the fail case (this will always | |
3123 | be the case if we were already skipping). */ | |
3124 | ||
b0e85a8f | 3125 | sub1 = expand_string_internal(s, TRUE, &s, !yes, TRUE, resetok); |
059ec3d9 PH |
3126 | if (sub1 == NULL && (yes || !expand_string_forcedfail)) goto FAILED; |
3127 | expand_string_forcedfail = FALSE; | |
3128 | if (*s++ != '}') goto FAILED_CURLY; | |
3129 | ||
3130 | /* If we want the first string, add it to the output */ | |
3131 | ||
3132 | if (yes) | |
3133 | *yieldptr = string_cat(*yieldptr, sizeptr, ptrptr, sub1, Ustrlen(sub1)); | |
3134 | ||
3135 | /* If this is called from a lookup or an extract, we want to restore $value to | |
3136 | what it was at the start of the item, so that it has this value during the | |
d20976dc PH |
3137 | second string expansion. For the call from "if" or "run" to this function, |
3138 | save_lookup is set to lookup_value, so that this statement does nothing. */ | |
059ec3d9 PH |
3139 | |
3140 | lookup_value = save_lookup; | |
3141 | ||
3142 | /* There now follows either another substring, or "fail", or nothing. This | |
3143 | time, forced failures are noticed only if we want the second string. We must | |
3144 | set skipping in the nested call if we don't want this string, or if we were | |
3145 | already skipping. */ | |
3146 | ||
3147 | while (isspace(*s)) s++; | |
3148 | if (*s == '{') | |
3149 | { | |
b0e85a8f | 3150 | sub2 = expand_string_internal(s+1, TRUE, &s, yes || skipping, TRUE, resetok); |
059ec3d9 PH |
3151 | if (sub2 == NULL && (!yes || !expand_string_forcedfail)) goto FAILED; |
3152 | expand_string_forcedfail = FALSE; | |
3153 | if (*s++ != '}') goto FAILED_CURLY; | |
3154 | ||
3155 | /* If we want the second string, add it to the output */ | |
3156 | ||
3157 | if (!yes) | |
3158 | *yieldptr = string_cat(*yieldptr, sizeptr, ptrptr, sub2, Ustrlen(sub2)); | |
3159 | } | |
3160 | ||
3161 | /* If there is no second string, but the word "fail" is present when the use of | |
3162 | the second string is wanted, set a flag indicating it was a forced failure | |
3163 | rather than a syntactic error. Swallow the terminating } in case this is nested | |
3164 | inside another lookup or if or extract. */ | |
3165 | ||
3166 | else if (*s != '}') | |
3167 | { | |
3168 | uschar name[256]; | |
3169 | s = read_name(name, sizeof(name), s, US"_"); | |
3170 | if (Ustrcmp(name, "fail") == 0) | |
3171 | { | |
3172 | if (!yes && !skipping) | |
3173 | { | |
3174 | while (isspace(*s)) s++; | |
3175 | if (*s++ != '}') goto FAILED_CURLY; | |
3176 | expand_string_message = | |
3177 | string_sprintf("\"%s\" failed and \"fail\" requested", type); | |
3178 | expand_string_forcedfail = TRUE; | |
3179 | goto FAILED; | |
3180 | } | |
3181 | } | |
3182 | else | |
3183 | { | |
3184 | expand_string_message = | |
3185 | string_sprintf("syntax error in \"%s\" item - \"fail\" expected", type); | |
3186 | goto FAILED; | |
3187 | } | |
3188 | } | |
3189 | ||
3190 | /* All we have to do now is to check on the final closing brace. */ | |
3191 | ||
3192 | while (isspace(*s)) s++; | |
3193 | if (*s++ == '}') goto RETURN; | |
3194 | ||
3195 | /* Get here if there is a bracketing failure */ | |
3196 | ||
3197 | FAILED_CURLY: | |
3198 | rc++; | |
3199 | ||
3200 | /* Get here for other failures */ | |
3201 | ||
3202 | FAILED: | |
3203 | rc++; | |
3204 | ||
3205 | /* Update the input pointer value before returning */ | |
3206 | ||
3207 | RETURN: | |
3208 | *sptr = s; | |
3209 | return rc; | |
3210 | } | |
3211 | ||
3212 | ||
3213 | ||
3214 | ||
059ec3d9 PH |
3215 | /************************************************* |
3216 | * Handle MD5 or SHA-1 computation for HMAC * | |
3217 | *************************************************/ | |
3218 | ||
3219 | /* These are some wrapping functions that enable the HMAC code to be a bit | |
3220 | cleaner. A good compiler will spot the tail recursion. | |
3221 | ||
3222 | Arguments: | |
3223 | type HMAC_MD5 or HMAC_SHA1 | |
3224 | remaining are as for the cryptographic hash functions | |
3225 | ||
3226 | Returns: nothing | |
3227 | */ | |
3228 | ||
3229 | static void | |
3230 | chash_start(int type, void *base) | |
3231 | { | |
3232 | if (type == HMAC_MD5) | |
3233 | md5_start((md5 *)base); | |
3234 | else | |
3235 | sha1_start((sha1 *)base); | |
3236 | } | |
3237 | ||
3238 | static void | |
3239 | chash_mid(int type, void *base, uschar *string) | |
3240 | { | |
3241 | if (type == HMAC_MD5) | |
3242 | md5_mid((md5 *)base, string); | |
3243 | else | |
3244 | sha1_mid((sha1 *)base, string); | |
3245 | } | |
3246 | ||
3247 | static void | |
3248 | chash_end(int type, void *base, uschar *string, int length, uschar *digest) | |
3249 | { | |
3250 | if (type == HMAC_MD5) | |
3251 | md5_end((md5 *)base, string, length, digest); | |
3252 | else | |
3253 | sha1_end((sha1 *)base, string, length, digest); | |
3254 | } | |
3255 | ||
3256 | ||
3257 | ||
3258 | ||
3259 | ||
1549ea3b PH |
3260 | /******************************************************** |
3261 | * prvs: Get last three digits of days since Jan 1, 1970 * | |
3262 | ********************************************************/ | |
3263 | ||
3264 | /* This is needed to implement the "prvs" BATV reverse | |
3265 | path signing scheme | |
3266 | ||
3267 | Argument: integer "days" offset to add or substract to | |
3268 | or from the current number of days. | |
3269 | ||
3270 | Returns: pointer to string containing the last three | |
3271 | digits of the number of days since Jan 1, 1970, | |
3272 | modified by the offset argument, NULL if there | |
3273 | was an error in the conversion. | |
3274 | ||
3275 | */ | |
3276 | ||
3277 | static uschar * | |
3278 | prvs_daystamp(int day_offset) | |
3279 | { | |
a86229cf PH |
3280 | uschar *days = store_get(32); /* Need at least 24 for cases */ |
3281 | (void)string_format(days, 32, TIME_T_FMT, /* where TIME_T_FMT is %lld */ | |
1549ea3b | 3282 | (time(NULL) + day_offset*86400)/86400); |
e169f567 | 3283 | return (Ustrlen(days) >= 3) ? &days[Ustrlen(days)-3] : US"100"; |
1549ea3b PH |
3284 | } |
3285 | ||
3286 | ||
3287 | ||
3288 | /******************************************************** | |
3289 | * prvs: perform HMAC-SHA1 computation of prvs bits * | |
3290 | ********************************************************/ | |
3291 | ||
3292 | /* This is needed to implement the "prvs" BATV reverse | |
3293 | path signing scheme | |
3294 | ||
3295 | Arguments: | |
3296 | address RFC2821 Address to use | |
3297 | key The key to use (must be less than 64 characters | |
3298 | in size) | |
3299 | key_num Single-digit key number to use. Defaults to | |
3300 | '0' when NULL. | |
3301 | ||
3302 | Returns: pointer to string containing the first three | |
3303 | bytes of the final hash in hex format, NULL if | |
3304 | there was an error in the process. | |
3305 | */ | |
3306 | ||
3307 | static uschar * | |
3308 | prvs_hmac_sha1(uschar *address, uschar *key, uschar *key_num, uschar *daystamp) | |
3309 | { | |
3310 | uschar *hash_source, *p; | |
3311 | int size = 0,offset = 0,i; | |
3312 | sha1 sha1_base; | |
3313 | void *use_base = &sha1_base; | |
3314 | uschar innerhash[20]; | |
3315 | uschar finalhash[20]; | |
3316 | uschar innerkey[64]; | |
3317 | uschar outerkey[64]; | |
3318 | uschar *finalhash_hex = store_get(40); | |
3319 | ||
3320 | if (key_num == NULL) | |
3321 | key_num = US"0"; | |
3322 | ||
3323 | if (Ustrlen(key) > 64) | |
3324 | return NULL; | |
3325 | ||
3326 | hash_source = string_cat(NULL,&size,&offset,key_num,1); | |
3327 | string_cat(hash_source,&size,&offset,daystamp,3); | |
3328 | string_cat(hash_source,&size,&offset,address,Ustrlen(address)); | |
3329 | hash_source[offset] = '\0'; | |
3330 | ||
3331 | DEBUG(D_expand) debug_printf("prvs: hash source is '%s'\n", hash_source); | |
3332 | ||
3333 | memset(innerkey, 0x36, 64); | |
3334 | memset(outerkey, 0x5c, 64); | |
3335 | ||
3336 | for (i = 0; i < Ustrlen(key); i++) | |
3337 | { | |
3338 | innerkey[i] ^= key[i]; | |
3339 | outerkey[i] ^= key[i]; | |
3340 | } | |
3341 | ||
3342 | chash_start(HMAC_SHA1, use_base); | |
3343 | chash_mid(HMAC_SHA1, use_base, innerkey); | |
3344 | chash_end(HMAC_SHA1, use_base, hash_source, offset, innerhash); | |
3345 | ||
3346 | chash_start(HMAC_SHA1, use_base); | |
3347 | chash_mid(HMAC_SHA1, use_base, outerkey); | |
3348 | chash_end(HMAC_SHA1, use_base, innerhash, 20, finalhash); | |
3349 | ||
3350 | p = finalhash_hex; | |
3351 | for (i = 0; i < 3; i++) | |
3352 | { | |
3353 | *p++ = hex_digits[(finalhash[i] & 0xf0) >> 4]; | |
3354 | *p++ = hex_digits[finalhash[i] & 0x0f]; | |
3355 | } | |
3356 | *p = '\0'; | |
3357 | ||
3358 | return finalhash_hex; | |
3359 | } | |
3360 | ||
3361 | ||
3362 | ||
3363 | ||
059ec3d9 PH |
3364 | /************************************************* |
3365 | * Join a file onto the output string * | |
3366 | *************************************************/ | |
3367 | ||
3368 | /* This is used for readfile and after a run expansion. It joins the contents | |
3369 | of a file onto the output string, globally replacing newlines with a given | |
3370 | string (optionally). The file is closed at the end. | |
3371 | ||
3372 | Arguments: | |
3373 | f the FILE | |
3374 | yield pointer to the expandable string | |
3375 | sizep pointer to the current size | |
3376 | ptrp pointer to the current position | |
3377 | eol newline replacement string, or NULL | |
3378 | ||
3379 | Returns: new value of string pointer | |
3380 | */ | |
3381 | ||
3382 | static uschar * | |
3383 | cat_file(FILE *f, uschar *yield, int *sizep, int *ptrp, uschar *eol) | |
3384 | { | |
3385 | int eollen; | |
3386 | uschar buffer[1024]; | |
3387 | ||
3388 | eollen = (eol == NULL)? 0 : Ustrlen(eol); | |
3389 | ||
3390 | while (Ufgets(buffer, sizeof(buffer), f) != NULL) | |
3391 | { | |
3392 | int len = Ustrlen(buffer); | |
3393 | if (eol != NULL && buffer[len-1] == '\n') len--; | |
3394 | yield = string_cat(yield, sizep, ptrp, buffer, len); | |
3395 | if (buffer[len] != 0) | |
3396 | yield = string_cat(yield, sizep, ptrp, eol, eollen); | |
3397 | } | |
3398 | ||
3399 | if (yield != NULL) yield[*ptrp] = 0; | |
3400 | ||
3401 | return yield; | |
3402 | } | |
3403 | ||
3404 | ||
3405 | ||
3406 | ||
3407 | /************************************************* | |
3408 | * Evaluate numeric expression * | |
3409 | *************************************************/ | |
3410 | ||
af561417 PH |
3411 | /* This is a set of mutually recursive functions that evaluate an arithmetic |
3412 | expression involving + - * / % & | ^ ~ << >> and parentheses. The only one of | |
3413 | these functions that is called from elsewhere is eval_expr, whose interface is: | |
059ec3d9 PH |
3414 | |
3415 | Arguments: | |
af561417 PH |
3416 | sptr pointer to the pointer to the string - gets updated |
3417 | decimal TRUE if numbers are to be assumed decimal | |
3418 | error pointer to where to put an error message - must be NULL on input | |
3419 | endket TRUE if ')' must terminate - FALSE for external call | |
059ec3d9 | 3420 | |
af561417 PH |
3421 | Returns: on success: the value of the expression, with *error still NULL |
3422 | on failure: an undefined value, with *error = a message | |
059ec3d9 PH |
3423 | */ |
3424 | ||
97d17305 | 3425 | static int_eximarith_t eval_op_or(uschar **, BOOL, uschar **); |
af561417 | 3426 | |
059ec3d9 | 3427 | |
97d17305 | 3428 | static int_eximarith_t |
059ec3d9 PH |
3429 | eval_expr(uschar **sptr, BOOL decimal, uschar **error, BOOL endket) |
3430 | { | |
3431 | uschar *s = *sptr; | |
97d17305 | 3432 | int_eximarith_t x = eval_op_or(&s, decimal, error); |
059ec3d9 PH |
3433 | if (*error == NULL) |
3434 | { | |
af561417 | 3435 | if (endket) |
059ec3d9 | 3436 | { |
af561417 PH |
3437 | if (*s != ')') |
3438 | *error = US"expecting closing parenthesis"; | |
3439 | else | |
3440 | while (isspace(*(++s))); | |
059ec3d9 | 3441 | } |
af561417 | 3442 | else if (*s != 0) *error = US"expecting operator"; |
059ec3d9 | 3443 | } |
059ec3d9 PH |
3444 | *sptr = s; |
3445 | return x; | |
3446 | } | |
3447 | ||
af561417 | 3448 | |
97d17305 | 3449 | static int_eximarith_t |
af561417 | 3450 | eval_number(uschar **sptr, BOOL decimal, uschar **error) |
059ec3d9 PH |
3451 | { |
3452 | register int c; | |
97d17305 | 3453 | int_eximarith_t n; |
059ec3d9 PH |
3454 | uschar *s = *sptr; |
3455 | while (isspace(*s)) s++; | |
3456 | c = *s; | |
af561417 | 3457 | if (isdigit(c)) |
059ec3d9 PH |
3458 | { |
3459 | int count; | |
97d17305 | 3460 | (void)sscanf(CS s, (decimal? SC_EXIM_DEC "%n" : SC_EXIM_ARITH "%n"), &n, &count); |
059ec3d9 | 3461 | s += count; |
97d17305 JH |
3462 | switch (tolower(*s)) |
3463 | { | |
3464 | default: break; | |
3465 | case 'k': n *= 1024; s++; break; | |
3466 | case 'm': n *= 1024*1024; s++; break; | |
3467 | case 'g': n *= 1024*1024*1024; s++; break; | |
3468 | } | |
059ec3d9 PH |
3469 | while (isspace (*s)) s++; |
3470 | } | |
3471 | else if (c == '(') | |
3472 | { | |
3473 | s++; | |
3474 | n = eval_expr(&s, decimal, error, 1); | |
3475 | } | |
3476 | else | |
3477 | { | |
3478 | *error = US"expecting number or opening parenthesis"; | |
3479 | n = 0; | |
3480 | } | |
3481 | *sptr = s; | |
3482 | return n; | |
3483 | } | |
3484 | ||
af561417 | 3485 | |
97d17305 | 3486 | static int_eximarith_t |
aa7c82b2 | 3487 | eval_op_unary(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3488 | { |
3489 | uschar *s = *sptr; | |
97d17305 | 3490 | int_eximarith_t x; |
af561417 PH |
3491 | while (isspace(*s)) s++; |
3492 | if (*s == '+' || *s == '-' || *s == '~') | |
3493 | { | |
3494 | int op = *s++; | |
3495 | x = eval_op_unary(&s, decimal, error); | |
3496 | if (op == '-') x = -x; | |
3497 | else if (op == '~') x = ~x; | |
3498 | } | |
3499 | else | |
3500 | { | |
3501 | x = eval_number(&s, decimal, error); | |
3502 | } | |
3503 | *sptr = s; | |
3504 | return x; | |
3505 | } | |
3506 | ||
3507 | ||
97d17305 | 3508 | static int_eximarith_t |
aa7c82b2 | 3509 | eval_op_mult(uschar **sptr, BOOL decimal, uschar **error) |
059ec3d9 PH |
3510 | { |
3511 | uschar *s = *sptr; | |
97d17305 | 3512 | int_eximarith_t x = eval_op_unary(&s, decimal, error); |
059ec3d9 PH |
3513 | if (*error == NULL) |
3514 | { | |
5591031b | 3515 | while (*s == '*' || *s == '/' || *s == '%') |
059ec3d9 PH |
3516 | { |
3517 | int op = *s++; | |
97d17305 | 3518 | int_eximarith_t y = eval_op_unary(&s, decimal, error); |
059ec3d9 | 3519 | if (*error != NULL) break; |
053a9aa3 PP |
3520 | /* SIGFPE both on div/mod by zero and on INT_MIN / -1, which would give |
3521 | * a value of INT_MAX+1. Note that INT_MIN * -1 gives INT_MIN for me, which | |
3522 | * is a bug somewhere in [gcc 4.2.1, FreeBSD, amd64]. In fact, -N*-M where | |
3523 | * -N*M is INT_MIN will yielf INT_MIN. | |
3524 | * Since we don't support floating point, this is somewhat simpler. | |
3525 | * Ideally, we'd return an error, but since we overflow for all other | |
3526 | * arithmetic, consistency suggests otherwise, but what's the correct value | |
3527 | * to use? There is none. | |
3528 | * The C standard guarantees overflow for unsigned arithmetic but signed | |
3529 | * overflow invokes undefined behaviour; in practice, this is overflow | |
3530 | * except for converting INT_MIN to INT_MAX+1. We also can't guarantee | |
3531 | * that long/longlong larger than int are available, or we could just work | |
3532 | * with larger types. We should consider whether to guarantee 32bit eval | |
3533 | * and 64-bit working variables, with errors returned. For now ... | |
3534 | * So, the only SIGFPEs occur with a non-shrinking div/mod, thus -1; we | |
3535 | * can just let the other invalid results occur otherwise, as they have | |
3536 | * until now. For this one case, we can coerce. | |
3537 | */ | |
4328fd3c | 3538 | if (y == -1 && x == EXIM_ARITH_MIN && op != '*') |
053a9aa3 PP |
3539 | { |
3540 | DEBUG(D_expand) | |
97d17305 | 3541 | debug_printf("Integer exception dodging: " PR_EXIM_ARITH "%c-1 coerced to " PR_EXIM_ARITH "\n", |
4328fd3c JH |
3542 | EXIM_ARITH_MIN, op, EXIM_ARITH_MAX); |
3543 | x = EXIM_ARITH_MAX; | |
053a9aa3 PP |
3544 | continue; |
3545 | } | |
a5b52695 PP |
3546 | if (op == '*') |
3547 | x *= y; | |
3548 | else | |
3549 | { | |
3550 | if (y == 0) | |
54e7ce4a | 3551 | { |
a5b52695 PP |
3552 | *error = (op == '/') ? US"divide by zero" : US"modulo by zero"; |
3553 | x = 0; | |
3554 | break; | |
54e7ce4a | 3555 | } |
a5b52695 PP |
3556 | if (op == '/') |
3557 | x /= y; | |
3558 | else | |
3559 | x %= y; | |
3560 | } | |
059ec3d9 PH |
3561 | } |
3562 | } | |
3563 | *sptr = s; | |
3564 | return x; | |
3565 | } | |
3566 | ||
3567 | ||
97d17305 | 3568 | static int_eximarith_t |
aa7c82b2 | 3569 | eval_op_sum(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3570 | { |
3571 | uschar *s = *sptr; | |
97d17305 | 3572 | int_eximarith_t x = eval_op_mult(&s, decimal, error); |
af561417 PH |
3573 | if (*error == NULL) |
3574 | { | |
3575 | while (*s == '+' || *s == '-') | |
3576 | { | |
3577 | int op = *s++; | |
97d17305 | 3578 | int_eximarith_t y = eval_op_mult(&s, decimal, error); |
af561417 PH |
3579 | if (*error != NULL) break; |
3580 | if (op == '+') x += y; else x -= y; | |
3581 | } | |
3582 | } | |
3583 | *sptr = s; | |
3584 | return x; | |
3585 | } | |
3586 | ||
3587 | ||
97d17305 | 3588 | static int_eximarith_t |
aa7c82b2 | 3589 | eval_op_shift(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3590 | { |
3591 | uschar *s = *sptr; | |
97d17305 | 3592 | int_eximarith_t x = eval_op_sum(&s, decimal, error); |
af561417 PH |
3593 | if (*error == NULL) |
3594 | { | |
3595 | while ((*s == '<' || *s == '>') && s[1] == s[0]) | |
3596 | { | |
97d17305 | 3597 | int_eximarith_t y; |
af561417 PH |
3598 | int op = *s++; |
3599 | s++; | |
3600 | y = eval_op_sum(&s, decimal, error); | |
3601 | if (*error != NULL) break; | |
3602 | if (op == '<') x <<= y; else x >>= y; | |
3603 | } | |
3604 | } | |
3605 | *sptr = s; | |
3606 | return x; | |
3607 | } | |
3608 | ||
3609 | ||
97d17305 | 3610 | static int_eximarith_t |
aa7c82b2 | 3611 | eval_op_and(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3612 | { |
3613 | uschar *s = *sptr; | |
97d17305 | 3614 | int_eximarith_t x = eval_op_shift(&s, decimal, error); |
af561417 PH |
3615 | if (*error == NULL) |
3616 | { | |
3617 | while (*s == '&') | |
3618 | { | |
97d17305 | 3619 | int_eximarith_t y; |
af561417 PH |
3620 | s++; |
3621 | y = eval_op_shift(&s, decimal, error); | |
3622 | if (*error != NULL) break; | |
3623 | x &= y; | |
3624 | } | |
3625 | } | |
3626 | *sptr = s; | |
3627 | return x; | |
3628 | } | |
3629 | ||
3630 | ||
97d17305 | 3631 | static int_eximarith_t |
aa7c82b2 | 3632 | eval_op_xor(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3633 | { |
3634 | uschar *s = *sptr; | |
97d17305 | 3635 | int_eximarith_t x = eval_op_and(&s, decimal, error); |
af561417 PH |
3636 | if (*error == NULL) |
3637 | { | |
3638 | while (*s == '^') | |
3639 | { | |
97d17305 | 3640 | int_eximarith_t y; |
af561417 PH |
3641 | s++; |
3642 | y = eval_op_and(&s, decimal, error); | |
3643 | if (*error != NULL) break; | |
3644 | x ^= y; | |
3645 | } | |
3646 | } | |
3647 | *sptr = s; | |
3648 | return x; | |
3649 | } | |
3650 | ||
3651 | ||
97d17305 | 3652 | static int_eximarith_t |
aa7c82b2 | 3653 | eval_op_or(uschar **sptr, BOOL decimal, uschar **error) |
af561417 PH |
3654 | { |
3655 | uschar *s = *sptr; | |
97d17305 | 3656 | int_eximarith_t x = eval_op_xor(&s, decimal, error); |
af561417 PH |
3657 | if (*error == NULL) |
3658 | { | |
3659 | while (*s == '|') | |
3660 | { | |
97d17305 | 3661 | int_eximarith_t y; |
af561417 PH |
3662 | s++; |
3663 | y = eval_op_xor(&s, decimal, error); | |
3664 | if (*error != NULL) break; | |
3665 | x |= y; | |
3666 | } | |
3667 | } | |
3668 | *sptr = s; | |
3669 | return x; | |
3670 | } | |
3671 | ||
059ec3d9 PH |
3672 | |
3673 | ||
3674 | /************************************************* | |
3675 | * Expand string * | |
3676 | *************************************************/ | |
3677 | ||
3678 | /* Returns either an unchanged string, or the expanded string in stacking pool | |
3679 | store. Interpreted sequences are: | |
3680 | ||
3681 | \... normal escaping rules | |
3682 | $name substitutes the variable | |
3683 | ${name} ditto | |
3684 | ${op:string} operates on the expanded string value | |
3685 | ${item{arg1}{arg2}...} expands the args and then does the business | |
3686 | some literal args are not enclosed in {} | |
3687 | ||
3688 | There are now far too many operators and item types to make it worth listing | |
3689 | them here in detail any more. | |
3690 | ||
3691 | We use an internal routine recursively to handle embedded substrings. The | |
3692 | external function follows. The yield is NULL if the expansion failed, and there | |
3693 | are two cases: if something collapsed syntactically, or if "fail" was given | |
3694 | as the action on a lookup failure. These can be distinguised by looking at the | |
3695 | variable expand_string_forcedfail, which is TRUE in the latter case. | |
3696 | ||
3697 | The skipping flag is set true when expanding a substring that isn't actually | |
3698 | going to be used (after "if" or "lookup") and it prevents lookups from | |
3699 | happening lower down. | |
3700 | ||
3701 | Store usage: At start, a store block of the length of the input plus 64 | |
3702 | is obtained. This is expanded as necessary by string_cat(), which might have to | |
3703 | get a new block, or might be able to expand the original. At the end of the | |
3704 | function we can release any store above that portion of the yield block that | |
3705 | was actually used. In many cases this will be optimal. | |
3706 | ||
3707 | However: if the first item in the expansion is a variable name or header name, | |
3708 | we reset the store before processing it; if the result is in fresh store, we | |
3709 | use that without copying. This is helpful for expanding strings like | |
3710 | $message_headers which can get very long. | |
3711 | ||
d6b4d938 TF |
3712 | There's a problem if a ${dlfunc item has side-effects that cause allocation, |
3713 | since resetting the store at the end of the expansion will free store that was | |
3714 | allocated by the plugin code as well as the slop after the expanded string. So | |
b0e85a8f JH |
3715 | we skip any resets if ${dlfunc } has been used. The same applies for ${acl } |
3716 | and, given the acl condition, ${if }. This is an unfortunate consequence of | |
3717 | string expansion becoming too powerful. | |
d6b4d938 | 3718 | |
059ec3d9 PH |
3719 | Arguments: |
3720 | string the string to be expanded | |
3721 | ket_ends true if expansion is to stop at } | |
3722 | left if not NULL, a pointer to the first character after the | |
3723 | expansion is placed here (typically used with ket_ends) | |
3724 | skipping TRUE for recursive calls when the value isn't actually going | |
3725 | to be used (to allow for optimisation) | |
da6dbe26 PP |
3726 | honour_dollar TRUE if $ is to be expanded, |
3727 | FALSE if it's just another character | |
b0e85a8f JH |
3728 | resetok_p if not NULL, pointer to flag - write FALSE if unsafe to reset |
3729 | the store. | |
059ec3d9 PH |
3730 | |
3731 | Returns: NULL if expansion fails: | |
3732 | expand_string_forcedfail is set TRUE if failure was forced | |
3733 | expand_string_message contains a textual error message | |
3734 | a pointer to the expanded string on success | |
3735 | */ | |
3736 | ||
3737 | static uschar * | |
3738 | expand_string_internal(uschar *string, BOOL ket_ends, uschar **left, | |
b0e85a8f | 3739 | BOOL skipping, BOOL honour_dollar, BOOL *resetok_p) |
059ec3d9 PH |
3740 | { |
3741 | int ptr = 0; | |
3742 | int size = Ustrlen(string)+ 64; | |
3743 | int item_type; | |
3744 | uschar *yield = store_get(size); | |
3745 | uschar *s = string; | |
3746 | uschar *save_expand_nstring[EXPAND_MAXN+1]; | |
3747 | int save_expand_nlength[EXPAND_MAXN+1]; | |
d6b4d938 | 3748 | BOOL resetok = TRUE; |
059ec3d9 PH |
3749 | |
3750 | expand_string_forcedfail = FALSE; | |
3751 | expand_string_message = US""; | |
3752 | ||
3753 | while (*s != 0) | |
3754 | { | |
3755 | uschar *value; | |
3756 | uschar name[256]; | |
3757 | ||
3758 | /* \ escapes the next character, which must exist, or else | |
3759 | the expansion fails. There's a special escape, \N, which causes | |
3760 | copying of the subject verbatim up to the next \N. Otherwise, | |
3761 | the escapes are the standard set. */ | |
3762 | ||
3763 | if (*s == '\\') | |
3764 | { | |
3765 | if (s[1] == 0) | |
3766 | { | |
3767 | expand_string_message = US"\\ at end of string"; | |
3768 | goto EXPAND_FAILED; | |
3769 | } | |
3770 | ||
3771 | if (s[1] == 'N') | |
3772 | { | |
3773 | uschar *t = s + 2; | |
3774 | for (s = t; *s != 0; s++) if (*s == '\\' && s[1] == 'N') break; | |
3775 | yield = string_cat(yield, &size, &ptr, t, s - t); | |
3776 | if (*s != 0) s += 2; | |
3777 | } | |
3778 | ||
3779 | else | |
3780 | { | |
3781 | uschar ch[1]; | |
3782 | ch[0] = string_interpret_escape(&s); | |
3783 | s++; | |
3784 | yield = string_cat(yield, &size, &ptr, ch, 1); | |
3785 | } | |
3786 | ||
3787 | continue; | |
3788 | } | |
3789 | ||
2e23003a | 3790 | /*{*/ |
059ec3d9 PH |
3791 | /* Anything other than $ is just copied verbatim, unless we are |
3792 | looking for a terminating } character. */ | |
3793 | ||
2e23003a | 3794 | /*{*/ |
059ec3d9 PH |
3795 | if (ket_ends && *s == '}') break; |
3796 | ||
da6dbe26 | 3797 | if (*s != '$' || !honour_dollar) |
059ec3d9 PH |
3798 | { |
3799 | yield = string_cat(yield, &size, &ptr, s++, 1); | |
3800 | continue; | |
3801 | } | |
3802 | ||
3803 | /* No { after the $ - must be a plain name or a number for string | |
3804 | match variable. There has to be a fudge for variables that are the | |
3805 | names of header fields preceded by "$header_" because header field | |
3806 | names can contain any printing characters except space and colon. | |
3807 | For those that don't like typing this much, "$h_" is a synonym for | |
3808 | "$header_". A non-existent header yields a NULL value; nothing is | |
2e23003a | 3809 | inserted. */ /*}*/ |
059ec3d9 PH |
3810 | |
3811 | if (isalpha((*(++s)))) | |
3812 | { | |
3813 | int len; | |
3814 | int newsize = 0; | |
3815 | ||
3816 | s = read_name(name, sizeof(name), s, US"_"); | |
3817 | ||
3818 | /* If this is the first thing to be expanded, release the pre-allocated | |
3819 | buffer. */ | |
3820 | ||
3821 | if (ptr == 0 && yield != NULL) | |
3822 | { | |
d6b4d938 | 3823 | if (resetok) store_reset(yield); |
059ec3d9 PH |
3824 | yield = NULL; |
3825 | size = 0; | |
3826 | } | |
3827 | ||
3828 | /* Header */ | |
3829 | ||
3830 | if (Ustrncmp(name, "h_", 2) == 0 || | |
3831 | Ustrncmp(name, "rh_", 3) == 0 || | |
3832 | Ustrncmp(name, "bh_", 3) == 0 || | |
3833 | Ustrncmp(name, "header_", 7) == 0 || | |
3834 | Ustrncmp(name, "rheader_", 8) == 0 || | |
3835 | Ustrncmp(name, "bheader_", 8) == 0) | |
3836 | { | |
3837 | BOOL want_raw = (name[0] == 'r')? TRUE : FALSE; | |
3838 | uschar *charset = (name[0] == 'b')? NULL : headers_charset; | |
3839 | s = read_header_name(name, sizeof(name), s); | |
3840 | value = find_header(name, FALSE, &newsize, want_raw, charset); | |
3841 | ||
3842 | /* If we didn't find the header, and the header contains a closing brace | |
0d85fa3f | 3843 | character, this may be a user error where the terminating colon |
059ec3d9 PH |
3844 | has been omitted. Set a flag to adjust the error message in this case. |
3845 | But there is no error here - nothing gets inserted. */ | |
3846 | ||
3847 | if (value == NULL) | |
3848 | { | |
3849 | if (Ustrchr(name, '}') != NULL) malformed_header = TRUE; | |
3850 | continue; | |
3851 | } | |
3852 | } | |
3853 | ||
3854 | /* Variable */ | |
3855 | ||
3856 | else | |
3857 | { | |
3858 | value = find_variable(name, FALSE, skipping, &newsize); | |
3859 | if (value == NULL) | |
3860 | { | |
3861 | expand_string_message = | |
3862 | string_sprintf("unknown variable name \"%s\"", name); | |
641cb756 | 3863 | check_variable_error_message(name); |
059ec3d9 PH |
3864 | goto EXPAND_FAILED; |
3865 | } | |
3866 | } | |
3867 | ||
3868 | /* If the data is known to be in a new buffer, newsize will be set to the | |
3869 | size of that buffer. If this is the first thing in an expansion string, | |
3870 | yield will be NULL; just point it at the new store instead of copying. Many | |
3871 | expansion strings contain just one reference, so this is a useful | |
3872 | optimization, especially for humungous headers. */ | |
3873 | ||
3874 | len = Ustrlen(value); | |
3875 | if (yield == NULL && newsize != 0) | |
3876 | { | |
3877 | yield = value; | |
3878 | size = newsize; | |
3879 | ptr = len; | |
3880 | } | |
3881 | else yield = string_cat(yield, &size, &ptr, value, len); | |
3882 | ||
3883 | continue; | |
3884 | } | |
3885 | ||
3886 | if (isdigit(*s)) | |
3887 | { | |
3888 | int n; | |
3889 | s = read_number(&n, s); | |
3890 | if (n >= 0 && n <= expand_nmax) | |
3891 | yield = string_cat(yield, &size, &ptr, expand_nstring[n], | |
3892 | expand_nlength[n]); | |
3893 | continue; | |
3894 | } | |
3895 | ||
2e23003a | 3896 | /* Otherwise, if there's no '{' after $ it's an error. */ /*}*/ |
059ec3d9 | 3897 | |
2e23003a | 3898 | if (*s != '{') /*}*/ |
059ec3d9 | 3899 | { |
2e23003a | 3900 | expand_string_message = US"$ not followed by letter, digit, or {"; /*}*/ |
059ec3d9 PH |
3901 | goto EXPAND_FAILED; |
3902 | } | |
3903 | ||
3904 | /* After { there can be various things, but they all start with | |
3905 | an initial word, except for a number for a string match variable. */ | |
3906 | ||
3907 | if (isdigit((*(++s)))) | |
3908 | { | |
3909 | int n; | |
2e23003a | 3910 | s = read_number(&n, s); /*{*/ |
059ec3d9 | 3911 | if (*s++ != '}') |
2e23003a | 3912 | { /*{*/ |
059ec3d9 PH |
3913 | expand_string_message = US"} expected after number"; |
3914 | goto EXPAND_FAILED; | |
3915 | } | |
3916 | if (n >= 0 && n <= expand_nmax) | |
3917 | yield = string_cat(yield, &size, &ptr, expand_nstring[n], | |
3918 | expand_nlength[n]); | |
3919 | continue; | |
3920 | } | |
3921 | ||
3922 | if (!isalpha(*s)) | |
3923 | { | |
2e23003a | 3924 | expand_string_message = US"letter or digit expected after ${"; /*}*/ |
059ec3d9 PH |
3925 | goto EXPAND_FAILED; |
3926 | } | |
3927 | ||
3928 | /* Allow "-" in names to cater for substrings with negative | |
3929 | arguments. Since we are checking for known names after { this is | |
3930 | OK. */ | |
3931 | ||
3932 | s = read_name(name, sizeof(name), s, US"_-"); | |
3933 | item_type = chop_match(name, item_table, sizeof(item_table)/sizeof(uschar *)); | |
3934 | ||
3935 | switch(item_type) | |
3936 | { | |
525239c1 | 3937 | /* Call an ACL from an expansion. We feed data in via $acl_arg1 - $acl_arg9. |
333eea9c | 3938 | If the ACL returns accept or reject we return content set by "message =" |
723c72e6 JH |
3939 | There is currently no limit on recursion; this would have us call |
3940 | acl_check_internal() directly and get a current level from somewhere. | |
f60d98e8 JH |
3941 | See also the acl expansion condition ECOND_ACL and the traditional |
3942 | acl modifier ACLC_ACL. | |
be7a5781 | 3943 | Assume that the function has side-effects on the store that must be preserved. |
723c72e6 JH |
3944 | */ |
3945 | ||
3946 | case EITEM_ACL: | |
333eea9c | 3947 | /* ${acl {name} {arg1}{arg2}...} */ |
723c72e6 | 3948 | { |
333eea9c | 3949 | uschar *sub[10]; /* name + arg1-arg9 (which must match number of acl_arg[]) */ |
723c72e6 | 3950 | uschar *user_msg; |
333eea9c | 3951 | |
b0e85a8f | 3952 | switch(read_subs(sub, 10, 1, &s, skipping, TRUE, US"acl", &resetok)) |
723c72e6 JH |
3953 | { |
3954 | case 1: goto EXPAND_FAILED_CURLY; | |
3955 | case 2: | |
3956 | case 3: goto EXPAND_FAILED; | |
3957 | } | |
3958 | if (skipping) continue; | |
3959 | ||
be7a5781 | 3960 | resetok = FALSE; |
f60d98e8 | 3961 | switch(eval_acl(sub, sizeof(sub)/sizeof(*sub), &user_msg)) |
723c72e6 JH |
3962 | { |
3963 | case OK: | |
333eea9c | 3964 | case FAIL: |
187bc588 JH |
3965 | DEBUG(D_expand) |
3966 | debug_printf("acl expansion yield: %s\n", user_msg); | |
723c72e6 JH |
3967 | if (user_msg) |
3968 | yield = string_cat(yield, &size, &ptr, user_msg, Ustrlen(user_msg)); | |
3969 | continue; | |
333eea9c | 3970 | |
723c72e6 | 3971 | case DEFER: |
333eea9c | 3972 | expand_string_forcedfail = TRUE; |
723c72e6 | 3973 | default: |
333eea9c | 3974 | expand_string_message = string_sprintf("error from acl \"%s\"", sub[0]); |
723c72e6 JH |
3975 | goto EXPAND_FAILED; |
3976 | } | |
3977 | } | |
3978 | ||
059ec3d9 PH |
3979 | /* Handle conditionals - preserve the values of the numerical expansion |
3980 | variables in case they get changed by a regular expression match in the | |
3981 | condition. If not, they retain their external settings. At the end | |
3982 | of this "if" section, they get restored to their previous values. */ | |
3983 | ||
3984 | case EITEM_IF: | |
3985 | { | |
3986 | BOOL cond = FALSE; | |
3987 | uschar *next_s; | |
3988 | int save_expand_nmax = | |
3989 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
3990 | ||
3991 | while (isspace(*s)) s++; | |
b0e85a8f | 3992 | next_s = eval_condition(s, &resetok, skipping? NULL : &cond); |
059ec3d9 PH |
3993 | if (next_s == NULL) goto EXPAND_FAILED; /* message already set */ |
3994 | ||
3995 | DEBUG(D_expand) | |
3996 | debug_printf("condition: %.*s\n result: %s\n", (int)(next_s - s), s, | |
3997 | cond? "true" : "false"); | |
3998 | ||
3999 | s = next_s; | |
4000 | ||
4001 | /* The handling of "yes" and "no" result strings is now in a separate | |
4002 | function that is also used by ${lookup} and ${extract} and ${run}. */ | |
4003 | ||
4004 | switch(process_yesno( | |
4005 | skipping, /* were previously skipping */ | |
4006 | cond, /* success/failure indicator */ | |
4007 | lookup_value, /* value to reset for string2 */ | |
4008 | &s, /* input pointer */ | |
4009 | &yield, /* output pointer */ | |
4010 | &size, /* output size */ | |
4011 | &ptr, /* output current point */ | |
b0e85a8f JH |
4012 | US"if", /* condition type */ |
4013 | &resetok)) | |
059ec3d9 PH |
4014 | { |
4015 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
4016 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
4017 | } | |
4018 | ||
4019 | /* Restore external setting of expansion variables for continuation | |
4020 | at this level. */ | |
4021 | ||
b0e85a8f JH |
4022 | restore_expand_strings(save_expand_nmax, save_expand_nstring, |
4023 | save_expand_nlength); | |
059ec3d9 PH |
4024 | continue; |
4025 | } | |
4026 | ||
4027 | /* Handle database lookups unless locked out. If "skipping" is TRUE, we are | |
4028 | expanding an internal string that isn't actually going to be used. All we | |
4029 | need to do is check the syntax, so don't do a lookup at all. Preserve the | |
4030 | values of the numerical expansion variables in case they get changed by a | |
4031 | partial lookup. If not, they retain their external settings. At the end | |
4032 | of this "lookup" section, they get restored to their previous values. */ | |
4033 | ||
4034 | case EITEM_LOOKUP: | |
4035 | { | |
4036 | int stype, partial, affixlen, starflags; | |
4037 | int expand_setup = 0; | |
4038 | int nameptr = 0; | |
4039 | uschar *key, *filename, *affix; | |
4040 | uschar *save_lookup_value = lookup_value; | |
4041 | int save_expand_nmax = | |
4042 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
4043 | ||
4044 | if ((expand_forbid & RDO_LOOKUP) != 0) | |
4045 | { | |
4046 | expand_string_message = US"lookup expansions are not permitted"; | |
4047 | goto EXPAND_FAILED; | |
4048 | } | |
4049 | ||
4050 | /* Get the key we are to look up for single-key+file style lookups. | |
4051 | Otherwise set the key NULL pro-tem. */ | |
4052 | ||
4053 | while (isspace(*s)) s++; | |
2e23003a | 4054 | if (*s == '{') /*}*/ |
059ec3d9 | 4055 | { |
b0e85a8f | 4056 | key = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
2e23003a | 4057 | if (key == NULL) goto EXPAND_FAILED; /*{*/ |
059ec3d9 PH |
4058 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; |
4059 | while (isspace(*s)) s++; | |
4060 | } | |
4061 | else key = NULL; | |
4062 | ||
4063 | /* Find out the type of database */ | |
4064 | ||
4065 | if (!isalpha(*s)) | |
4066 | { | |
4067 | expand_string_message = US"missing lookup type"; | |
4068 | goto EXPAND_FAILED; | |
4069 | } | |
4070 | ||
4071 | /* The type is a string that may contain special characters of various | |
4072 | kinds. Allow everything except space or { to appear; the actual content | |
2e23003a | 4073 | is checked by search_findtype_partial. */ /*}*/ |
059ec3d9 | 4074 | |
2e23003a | 4075 | while (*s != 0 && *s != '{' && !isspace(*s)) /*}*/ |
059ec3d9 PH |
4076 | { |
4077 | if (nameptr < sizeof(name) - 1) name[nameptr++] = *s; | |
4078 | s++; | |
4079 | } | |
4080 | name[nameptr] = 0; | |
4081 | while (isspace(*s)) s++; | |
4082 | ||
4083 | /* Now check for the individual search type and any partial or default | |
4084 | options. Only those types that are actually in the binary are valid. */ | |
4085 | ||
4086 | stype = search_findtype_partial(name, &partial, &affix, &affixlen, | |
4087 | &starflags); | |
4088 | if (stype < 0) | |
4089 | { | |
4090 | expand_string_message = search_error_message; | |
4091 | goto EXPAND_FAILED; | |
4092 | } | |
4093 | ||
4094 | /* Check that a key was provided for those lookup types that need it, | |
4095 | and was not supplied for those that use the query style. */ | |
4096 | ||
13b685f9 | 4097 | if (!mac_islookup(stype, lookup_querystyle|lookup_absfilequery)) |
059ec3d9 PH |
4098 | { |
4099 | if (key == NULL) | |
4100 | { | |
4101 | expand_string_message = string_sprintf("missing {key} for single-" | |
4102 | "key \"%s\" lookup", name); | |
4103 | goto EXPAND_FAILED; | |
4104 | } | |
4105 | } | |
4106 | else | |
4107 | { | |
4108 | if (key != NULL) | |
4109 | { | |
4110 | expand_string_message = string_sprintf("a single key was given for " | |
4111 | "lookup type \"%s\", which is not a single-key lookup type", name); | |
4112 | goto EXPAND_FAILED; | |
4113 | } | |
4114 | } | |
4115 | ||
4116 | /* Get the next string in brackets and expand it. It is the file name for | |
13b685f9 PH |
4117 | single-key+file lookups, and the whole query otherwise. In the case of |
4118 | queries that also require a file name (e.g. sqlite), the file name comes | |
4119 | first. */ | |
059ec3d9 PH |
4120 | |
4121 | if (*s != '{') goto EXPAND_FAILED_CURLY; | |
b0e85a8f | 4122 | filename = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
059ec3d9 PH |
4123 | if (filename == NULL) goto EXPAND_FAILED; |
4124 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4125 | while (isspace(*s)) s++; | |
4126 | ||
4127 | /* If this isn't a single-key+file lookup, re-arrange the variables | |
13b685f9 PH |
4128 | to be appropriate for the search_ functions. For query-style lookups, |
4129 | there is just a "key", and no file name. For the special query-style + | |
4130 | file types, the query (i.e. "key") starts with a file name. */ | |
059ec3d9 PH |
4131 | |
4132 | if (key == NULL) | |
4133 | { | |
13b685f9 | 4134 | while (isspace(*filename)) filename++; |
059ec3d9 | 4135 | key = filename; |
13b685f9 PH |
4136 | |
4137 | if (mac_islookup(stype, lookup_querystyle)) | |
4138 | { | |
4139 | filename = NULL; | |
4140 | } | |
4141 | else | |
4142 | { | |
4143 | if (*filename != '/') | |
4144 | { | |
4145 | expand_string_message = string_sprintf( | |
4146 | "absolute file name expected for \"%s\" lookup", name); | |
4147 | goto EXPAND_FAILED; | |
4148 | } | |
4149 | while (*key != 0 && !isspace(*key)) key++; | |
4150 | if (*key != 0) *key++ = 0; | |
4151 | } | |
059ec3d9 PH |
4152 | } |
4153 | ||
4154 | /* If skipping, don't do the next bit - just lookup_value == NULL, as if | |
4155 | the entry was not found. Note that there is no search_close() function. | |
4156 | Files are left open in case of re-use. At suitable places in higher logic, | |
4157 | search_tidyup() is called to tidy all open files. This can save opening | |
4158 | the same file several times. However, files may also get closed when | |
4159 | others are opened, if too many are open at once. The rule is that a | |
4160 | handle should not be used after a second search_open(). | |
4161 | ||
4162 | Request that a partial search sets up $1 and maybe $2 by passing | |
4163 | expand_setup containing zero. If its value changes, reset expand_nmax, | |
4164 | since new variables will have been set. Note that at the end of this | |
4165 | "lookup" section, the old numeric variables are restored. */ | |
4166 | ||
4167 | if (skipping) | |
4168 | lookup_value = NULL; | |
4169 | else | |
4170 | { | |
4171 | void *handle = search_open(filename, stype, 0, NULL, NULL); | |
4172 | if (handle == NULL) | |
4173 | { | |
4174 | expand_string_message = search_error_message; | |
4175 | goto EXPAND_FAILED; | |
4176 | } | |
4177 | lookup_value = search_find(handle, filename, key, partial, affix, | |
4178 | affixlen, starflags, &expand_setup); | |
4179 | if (search_find_defer) | |
4180 | { | |
4181 | expand_string_message = | |
b72aab72 PP |
4182 | string_sprintf("lookup of \"%s\" gave DEFER: %s", |
4183 | string_printing2(key, FALSE), search_error_message); | |
059ec3d9 PH |
4184 | goto EXPAND_FAILED; |
4185 | } | |
4186 | if (expand_setup > 0) expand_nmax = expand_setup; | |
4187 | } | |
4188 | ||
4189 | /* The handling of "yes" and "no" result strings is now in a separate | |
4190 | function that is also used by ${if} and ${extract}. */ | |
4191 | ||
4192 | switch(process_yesno( | |
4193 | skipping, /* were previously skipping */ | |
4194 | lookup_value != NULL, /* success/failure indicator */ | |
4195 | save_lookup_value, /* value to reset for string2 */ | |
4196 | &s, /* input pointer */ | |
4197 | &yield, /* output pointer */ | |
4198 | &size, /* output size */ | |
4199 | &ptr, /* output current point */ | |
b0e85a8f JH |
4200 | US"lookup", /* condition type */ |
4201 | &resetok)) | |
059ec3d9 PH |
4202 | { |
4203 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
4204 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
4205 | } | |
4206 | ||
4207 | /* Restore external setting of expansion variables for carrying on | |
4208 | at this level, and continue. */ | |
4209 | ||
4210 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
4211 | save_expand_nlength); | |
4212 | continue; | |
4213 | } | |
4214 | ||
4215 | /* If Perl support is configured, handle calling embedded perl subroutines, | |
4216 | unless locked out at this time. Syntax is ${perl{sub}} or ${perl{sub}{arg}} | |
4217 | or ${perl{sub}{arg1}{arg2}} or up to a maximum of EXIM_PERL_MAX_ARGS | |
4218 | arguments (defined below). */ | |
4219 | ||
059ec3d9 PH |
4220 | #define EXIM_PERL_MAX_ARGS 8 |
4221 | ||
4222 | case EITEM_PERL: | |
1a46a8c5 | 4223 | #ifndef EXIM_PERL |
2e23003a | 4224 | expand_string_message = US"\"${perl\" encountered, but this facility " /*}*/ |
1a46a8c5 PH |
4225 | "is not included in this binary"; |
4226 | goto EXPAND_FAILED; | |
4227 | ||
4228 | #else /* EXIM_PERL */ | |
059ec3d9 PH |
4229 | { |
4230 | uschar *sub_arg[EXIM_PERL_MAX_ARGS + 2]; | |
4231 | uschar *new_yield; | |
4232 | ||
4233 | if ((expand_forbid & RDO_PERL) != 0) | |
4234 | { | |
4235 | expand_string_message = US"Perl calls are not permitted"; | |
4236 | goto EXPAND_FAILED; | |
4237 | } | |
4238 | ||
4239 | switch(read_subs(sub_arg, EXIM_PERL_MAX_ARGS + 1, 1, &s, skipping, TRUE, | |
b0e85a8f | 4240 | US"perl", &resetok)) |
059ec3d9 PH |
4241 | { |
4242 | case 1: goto EXPAND_FAILED_CURLY; | |
4243 | case 2: | |
4244 | case 3: goto EXPAND_FAILED; | |
4245 | } | |
4246 | ||
4247 | /* If skipping, we don't actually do anything */ | |
4248 | ||
4249 | if (skipping) continue; | |
4250 | ||
4251 | /* Start the interpreter if necessary */ | |
4252 | ||
4253 | if (!opt_perl_started) | |
4254 | { | |
4255 | uschar *initerror; | |
4256 | if (opt_perl_startup == NULL) | |
4257 | { | |
4258 | expand_string_message = US"A setting of perl_startup is needed when " | |
4259 | "using the Perl interpreter"; | |
4260 | goto EXPAND_FAILED; | |
4261 | } | |
4262 | DEBUG(D_any) debug_printf("Starting Perl interpreter\n"); | |
4263 | initerror = init_perl(opt_perl_startup); | |
4264 | if (initerror != NULL) | |
4265 | { | |
4266 | expand_string_message = | |
4267 | string_sprintf("error in perl_startup code: %s\n", initerror); | |
4268 | goto EXPAND_FAILED; | |
4269 | } | |
4270 | opt_perl_started = TRUE; | |
4271 | } | |
4272 | ||
4273 | /* Call the function */ | |
4274 | ||
4275 | sub_arg[EXIM_PERL_MAX_ARGS + 1] = NULL; | |
4276 | new_yield = call_perl_cat(yield, &size, &ptr, &expand_string_message, | |
4277 | sub_arg[0], sub_arg + 1); | |
4278 | ||
4279 | /* NULL yield indicates failure; if the message pointer has been set to | |
4280 | NULL, the yield was undef, indicating a forced failure. Otherwise the | |
4281 | message will indicate some kind of Perl error. */ | |
4282 | ||
4283 | if (new_yield == NULL) | |
4284 | { | |
4285 | if (expand_string_message == NULL) | |
4286 | { | |
4287 | expand_string_message = | |
4288 | string_sprintf("Perl subroutine \"%s\" returned undef to force " | |
4289 | "failure", sub_arg[0]); | |
4290 | expand_string_forcedfail = TRUE; | |
4291 | } | |
4292 | goto EXPAND_FAILED; | |
4293 | } | |
4294 | ||
4295 | /* Yield succeeded. Ensure forcedfail is unset, just in case it got | |
4296 | set during a callback from Perl. */ | |
4297 | ||
4298 | expand_string_forcedfail = FALSE; | |
4299 | yield = new_yield; | |
4300 | continue; | |
4301 | } | |
4302 | #endif /* EXIM_PERL */ | |
4303 | ||
fffda43a TK |
4304 | /* Transform email address to "prvs" scheme to use |
4305 | as BATV-signed return path */ | |
4306 | ||
4307 | case EITEM_PRVS: | |
4308 | { | |
4309 | uschar *sub_arg[3]; | |
4310 | uschar *p,*domain; | |
4311 | ||
b0e85a8f | 4312 | switch(read_subs(sub_arg, 3, 2, &s, skipping, TRUE, US"prvs", &resetok)) |
fffda43a TK |
4313 | { |
4314 | case 1: goto EXPAND_FAILED_CURLY; | |
4315 | case 2: | |
4316 | case 3: goto EXPAND_FAILED; | |
4317 | } | |
4318 | ||
4319 | /* If skipping, we don't actually do anything */ | |
4320 | if (skipping) continue; | |
4321 | ||
4322 | /* sub_arg[0] is the address */ | |
4323 | domain = Ustrrchr(sub_arg[0],'@'); | |
4324 | if ( (domain == NULL) || (domain == sub_arg[0]) || (Ustrlen(domain) == 1) ) | |
4325 | { | |
cb9328de PH |
4326 | expand_string_message = US"prvs first argument must be a qualified email address"; |
4327 | goto EXPAND_FAILED; | |
4328 | } | |
4329 | ||
4330 | /* Calculate the hash. The second argument must be a single-digit | |
4331 | key number, or unset. */ | |
4332 | ||
4333 | if (sub_arg[2] != NULL && | |
4334 | (!isdigit(sub_arg[2][0]) || sub_arg[2][1] != 0)) | |
4335 | { | |
4336 | expand_string_message = US"prvs second argument must be a single digit"; | |
fffda43a TK |
4337 | goto EXPAND_FAILED; |
4338 | } | |
4339 | ||
fffda43a TK |
4340 | p = prvs_hmac_sha1(sub_arg[0],sub_arg[1],sub_arg[2],prvs_daystamp(7)); |
4341 | if (p == NULL) | |
4342 | { | |
cb9328de | 4343 | expand_string_message = US"prvs hmac-sha1 conversion failed"; |
fffda43a TK |
4344 | goto EXPAND_FAILED; |
4345 | } | |
4346 | ||
4347 | /* Now separate the domain from the local part */ | |
4348 | *domain++ = '\0'; | |
4349 | ||
4350 | yield = string_cat(yield,&size,&ptr,US"prvs=",5); | |
fffda43a TK |
4351 | string_cat(yield,&size,&ptr,(sub_arg[2] != NULL) ? sub_arg[2] : US"0", 1); |
4352 | string_cat(yield,&size,&ptr,prvs_daystamp(7),3); | |
4353 | string_cat(yield,&size,&ptr,p,6); | |
a48ced90 TK |
4354 | string_cat(yield,&size,&ptr,US"=",1); |
4355 | string_cat(yield,&size,&ptr,sub_arg[0],Ustrlen(sub_arg[0])); | |
fffda43a TK |
4356 | string_cat(yield,&size,&ptr,US"@",1); |
4357 | string_cat(yield,&size,&ptr,domain,Ustrlen(domain)); | |
4358 | ||
4359 | continue; | |
4360 | } | |
4361 | ||
4362 | /* Check a prvs-encoded address for validity */ | |
4363 | ||
4364 | case EITEM_PRVSCHECK: | |
4365 | { | |
4366 | uschar *sub_arg[3]; | |
4367 | int mysize = 0, myptr = 0; | |
4368 | const pcre *re; | |
4369 | uschar *p; | |
72fdd6ae PH |
4370 | |
4371 | /* TF: Ugliness: We want to expand parameter 1 first, then set | |
fffda43a TK |
4372 | up expansion variables that are used in the expansion of |
4373 | parameter 2. So we clone the string for the first | |
72fdd6ae PH |
4374 | expansion, where we only expand parameter 1. |
4375 | ||
4376 | PH: Actually, that isn't necessary. The read_subs() function is | |
4377 | designed to work this way for the ${if and ${lookup expansions. I've | |
4378 | tidied the code. | |
4379 | */ | |
fffda43a TK |
4380 | |
4381 | /* Reset expansion variables */ | |
4382 | prvscheck_result = NULL; | |
4383 | prvscheck_address = NULL; | |
4384 | prvscheck_keynum = NULL; | |
4385 | ||
b0e85a8f | 4386 | switch(read_subs(sub_arg, 1, 1, &s, skipping, FALSE, US"prvs", &resetok)) |
fffda43a TK |
4387 | { |
4388 | case 1: goto EXPAND_FAILED_CURLY; | |
4389 | case 2: | |
4390 | case 3: goto EXPAND_FAILED; | |
4391 | } | |
4392 | ||
a48ced90 | 4393 | re = regex_must_compile(US"^prvs\\=([0-9])([0-9]{3})([A-F0-9]{6})\\=(.+)\\@(.+)$", |
fffda43a TK |
4394 | TRUE,FALSE); |
4395 | ||
72fdd6ae PH |
4396 | if (regex_match_and_setup(re,sub_arg[0],0,-1)) |
4397 | { | |
a48ced90 TK |
4398 | uschar *local_part = string_copyn(expand_nstring[4],expand_nlength[4]); |
4399 | uschar *key_num = string_copyn(expand_nstring[1],expand_nlength[1]); | |
4400 | uschar *daystamp = string_copyn(expand_nstring[2],expand_nlength[2]); | |
4401 | uschar *hash = string_copyn(expand_nstring[3],expand_nlength[3]); | |
fffda43a TK |
4402 | uschar *domain = string_copyn(expand_nstring[5],expand_nlength[5]); |
4403 | ||
4404 | DEBUG(D_expand) debug_printf("prvscheck localpart: %s\n", local_part); | |
4405 | DEBUG(D_expand) debug_printf("prvscheck key number: %s\n", key_num); | |
4406 | DEBUG(D_expand) debug_printf("prvscheck daystamp: %s\n", daystamp); | |
4407 | DEBUG(D_expand) debug_printf("prvscheck hash: %s\n", hash); | |
4408 | DEBUG(D_expand) debug_printf("prvscheck domain: %s\n", domain); | |
4409 | ||
4410 | /* Set up expansion variables */ | |
4411 | prvscheck_address = string_cat(NULL, &mysize, &myptr, local_part, Ustrlen(local_part)); | |
2740a2ca | 4412 | string_cat(prvscheck_address,&mysize,&myptr,US"@",1); |
fffda43a TK |
4413 | string_cat(prvscheck_address,&mysize,&myptr,domain,Ustrlen(domain)); |
4414 | prvscheck_address[myptr] = '\0'; | |
4415 | prvscheck_keynum = string_copy(key_num); | |
4416 | ||
72fdd6ae | 4417 | /* Now expand the second argument */ |
b0e85a8f | 4418 | switch(read_subs(sub_arg, 1, 1, &s, skipping, FALSE, US"prvs", &resetok)) |
fffda43a TK |
4419 | { |
4420 | case 1: goto EXPAND_FAILED_CURLY; | |
4421 | case 2: | |
4422 | case 3: goto EXPAND_FAILED; | |
4423 | } | |
4424 | ||
fffda43a | 4425 | /* Now we have the key and can check the address. */ |
72fdd6ae PH |
4426 | |
4427 | p = prvs_hmac_sha1(prvscheck_address, sub_arg[0], prvscheck_keynum, | |
4428 | daystamp); | |
4429 | ||
fffda43a TK |
4430 | if (p == NULL) |
4431 | { | |
4432 | expand_string_message = US"hmac-sha1 conversion failed"; | |
4433 | goto EXPAND_FAILED; | |
4434 | } | |
4435 | ||
4436 | DEBUG(D_expand) debug_printf("prvscheck: received hash is %s\n", hash); | |
4437 | DEBUG(D_expand) debug_printf("prvscheck: own hash is %s\n", p); | |
72fdd6ae | 4438 | |
fffda43a TK |
4439 | if (Ustrcmp(p,hash) == 0) |
4440 | { | |
4441 | /* Success, valid BATV address. Now check the expiry date. */ | |
4442 | uschar *now = prvs_daystamp(0); | |
4443 | unsigned int inow = 0,iexpire = 1; | |
4444 | ||
ff790e47 PH |
4445 | (void)sscanf(CS now,"%u",&inow); |
4446 | (void)sscanf(CS daystamp,"%u",&iexpire); | |
fffda43a TK |
4447 | |
4448 | /* When "iexpire" is < 7, a "flip" has occured. | |
4449 | Adjust "inow" accordingly. */ | |
4450 | if ( (iexpire < 7) && (inow >= 993) ) inow = 0; | |
4451 | ||
686c36b7 | 4452 | if (iexpire >= inow) |
fffda43a TK |
4453 | { |
4454 | prvscheck_result = US"1"; | |
4455 | DEBUG(D_expand) debug_printf("prvscheck: success, $pvrs_result set to 1\n"); | |
4456 | } | |
4457 | else | |
4458 | { | |
4459 | prvscheck_result = NULL; | |
4460 | DEBUG(D_expand) debug_printf("prvscheck: signature expired, $pvrs_result unset\n"); | |
4461 | } | |
4462 | } | |
4463 | else | |
4464 | { | |
4465 | prvscheck_result = NULL; | |
4466 | DEBUG(D_expand) debug_printf("prvscheck: hash failure, $pvrs_result unset\n"); | |
4467 | } | |
72fdd6ae PH |
4468 | |
4469 | /* Now expand the final argument. We leave this till now so that | |
4470 | it can include $prvscheck_result. */ | |
4471 | ||
b0e85a8f | 4472 | switch(read_subs(sub_arg, 1, 0, &s, skipping, TRUE, US"prvs", &resetok)) |
72fdd6ae PH |
4473 | { |
4474 | case 1: goto EXPAND_FAILED_CURLY; | |
4475 | case 2: | |
4476 | case 3: goto EXPAND_FAILED; | |
4477 | } | |
4478 | ||
4479 | if (sub_arg[0] == NULL || *sub_arg[0] == '\0') | |
4480 | yield = string_cat(yield,&size,&ptr,prvscheck_address,Ustrlen(prvscheck_address)); | |
4481 | else | |
4482 | yield = string_cat(yield,&size,&ptr,sub_arg[0],Ustrlen(sub_arg[0])); | |
4483 | ||
4484 | /* Reset the "internal" variables afterwards, because they are in | |
4485 | dynamic store that will be reclaimed if the expansion succeeded. */ | |
4486 | ||
4487 | prvscheck_address = NULL; | |
4488 | prvscheck_keynum = NULL; | |
4489 | } | |
fffda43a TK |
4490 | else |
4491 | { | |
4492 | /* Does not look like a prvs encoded address, return the empty string. | |
72fdd6ae PH |
4493 | We need to make sure all subs are expanded first, so as to skip over |
4494 | the entire item. */ | |
4495 | ||
b0e85a8f | 4496 | switch(read_subs(sub_arg, 2, 1, &s, skipping, TRUE, US"prvs", &resetok)) |
fffda43a TK |
4497 | { |
4498 | case 1: goto EXPAND_FAILED_CURLY; | |
4499 | case 2: | |
4500 | case 3: goto EXPAND_FAILED; | |
4501 | } | |
4502 | } | |
4503 | ||
4504 | continue; | |
4505 | } | |
4506 | ||
059ec3d9 PH |
4507 | /* Handle "readfile" to insert an entire file */ |
4508 | ||
4509 | case EITEM_READFILE: | |
4510 | { | |
4511 | FILE *f; | |
4512 | uschar *sub_arg[2]; | |
4513 | ||
4514 | if ((expand_forbid & RDO_READFILE) != 0) | |
4515 | { | |
4516 | expand_string_message = US"file insertions are not permitted"; | |
4517 | goto EXPAND_FAILED; | |
4518 | } | |
4519 | ||
b0e85a8f | 4520 | switch(read_subs(sub_arg, 2, 1, &s, skipping, TRUE, US"readfile", &resetok)) |
059ec3d9 PH |
4521 | { |
4522 | case 1: goto EXPAND_FAILED_CURLY; | |
4523 | case 2: | |
4524 | case 3: goto EXPAND_FAILED; | |
4525 | } | |
4526 | ||
4527 | /* If skipping, we don't actually do anything */ | |
4528 | ||
4529 | if (skipping) continue; | |
4530 | ||
4531 | /* Open the file and read it */ | |
4532 | ||
4533 | f = Ufopen(sub_arg[0], "rb"); | |
4534 | if (f == NULL) | |
4535 | { | |
4536 | expand_string_message = string_open_failed(errno, "%s", sub_arg[0]); | |
4537 | goto EXPAND_FAILED; | |
4538 | } | |
4539 | ||
4540 | yield = cat_file(f, yield, &size, &ptr, sub_arg[1]); | |
f1e894f3 | 4541 | (void)fclose(f); |
059ec3d9 PH |
4542 | continue; |
4543 | } | |
4544 | ||
4545 | /* Handle "readsocket" to insert data from a Unix domain socket */ | |
4546 | ||
4547 | case EITEM_READSOCK: | |
4548 | { | |
4549 | int fd; | |
4550 | int timeout = 5; | |
4551 | int save_ptr = ptr; | |
4552 | FILE *f; | |
4553 | struct sockaddr_un sockun; /* don't call this "sun" ! */ | |
4554 | uschar *arg; | |
4555 | uschar *sub_arg[4]; | |
4556 | ||
4557 | if ((expand_forbid & RDO_READSOCK) != 0) | |
4558 | { | |
4559 | expand_string_message = US"socket insertions are not permitted"; | |
4560 | goto EXPAND_FAILED; | |
4561 | } | |
4562 | ||
4563 | /* Read up to 4 arguments, but don't do the end of item check afterwards, | |
4564 | because there may be a string for expansion on failure. */ | |
4565 | ||
b0e85a8f | 4566 | switch(read_subs(sub_arg, 4, 2, &s, skipping, FALSE, US"readsocket", &resetok)) |
059ec3d9 PH |
4567 | { |
4568 | case 1: goto EXPAND_FAILED_CURLY; | |
4569 | case 2: /* Won't occur: no end check */ | |
4570 | case 3: goto EXPAND_FAILED; | |
4571 | } | |
4572 | ||
4573 | /* Sort out timeout, if given */ | |
4574 | ||
4575 | if (sub_arg[2] != NULL) | |
4576 | { | |
4577 | timeout = readconf_readtime(sub_arg[2], 0, FALSE); | |
4578 | if (timeout < 0) | |
4579 | { | |
4580 | expand_string_message = string_sprintf("bad time value %s", | |
4581 | sub_arg[2]); | |
4582 | goto EXPAND_FAILED; | |
4583 | } | |
4584 | } | |
4585 | else sub_arg[3] = NULL; /* No eol if no timeout */ | |
4586 | ||
1cce3af8 PH |
4587 | /* If skipping, we don't actually do anything. Otherwise, arrange to |
4588 | connect to either an IP or a Unix socket. */ | |
059ec3d9 PH |
4589 | |
4590 | if (!skipping) | |
4591 | { | |
1cce3af8 | 4592 | /* Handle an IP (internet) domain */ |
059ec3d9 | 4593 | |
91ecef39 | 4594 | if (Ustrncmp(sub_arg[0], "inet:", 5) == 0) |
059ec3d9 | 4595 | { |
b1f8e4f8 | 4596 | int port; |
1cce3af8 PH |
4597 | uschar *server_name = sub_arg[0] + 5; |
4598 | uschar *port_name = Ustrrchr(server_name, ':'); | |
4599 | ||
4600 | /* Sort out the port */ | |
4601 | ||
4602 | if (port_name == NULL) | |
4603 | { | |
4604 | expand_string_message = | |
4605 | string_sprintf("missing port for readsocket %s", sub_arg[0]); | |
4606 | goto EXPAND_FAILED; | |
4607 | } | |
4608 | *port_name++ = 0; /* Terminate server name */ | |
4609 | ||
4610 | if (isdigit(*port_name)) | |
4611 | { | |
4612 | uschar *end; | |
4613 | port = Ustrtol(port_name, &end, 0); | |
4614 | if (end != port_name + Ustrlen(port_name)) | |
4615 | { | |
4616 | expand_string_message = | |
4617 | string_sprintf("invalid port number %s", port_name); | |
4618 | goto EXPAND_FAILED; | |
4619 | } | |
4620 | } | |
4621 | else | |
4622 | { | |
4623 | struct servent *service_info = getservbyname(CS port_name, "tcp"); | |
4624 | if (service_info == NULL) | |
4625 | { | |
4626 | expand_string_message = string_sprintf("unknown port \"%s\"", | |
4627 | port_name); | |
4628 | goto EXPAND_FAILED; | |
4629 | } | |
4630 | port = ntohs(service_info->s_port); | |
4631 | } | |
4632 | ||
b1f8e4f8 JH |
4633 | if ((fd = ip_connectedsocket(SOCK_STREAM, server_name, port, port, |
4634 | timeout, NULL, &expand_string_message)) < 0) | |
1cce3af8 | 4635 | goto SOCK_FAIL; |
059ec3d9 PH |
4636 | } |
4637 | ||
1cce3af8 PH |
4638 | /* Handle a Unix domain socket */ |
4639 | ||
4640 | else | |
059ec3d9 | 4641 | { |
a401ddaa | 4642 | int rc; |
1cce3af8 PH |
4643 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) == -1) |
4644 | { | |
4645 | expand_string_message = string_sprintf("failed to create socket: %s", | |
4646 | strerror(errno)); | |
4647 | goto SOCK_FAIL; | |
4648 | } | |
4649 | ||
4650 | sockun.sun_family = AF_UNIX; | |
4651 | sprintf(sockun.sun_path, "%.*s", (int)(sizeof(sockun.sun_path)-1), | |
4652 | sub_arg[0]); | |
a401ddaa PH |
4653 | |
4654 | sigalrm_seen = FALSE; | |
4655 | alarm(timeout); | |
4656 | rc = connect(fd, (struct sockaddr *)(&sockun), sizeof(sockun)); | |
4657 | alarm(0); | |
734e1499 | 4658 | if (sigalrm_seen) |
1cce3af8 | 4659 | { |
734e1499 | 4660 | expand_string_message = US "socket connect timed out"; |
1cce3af8 PH |
4661 | goto SOCK_FAIL; |
4662 | } | |
734e1499 | 4663 | if (rc < 0) |
a401ddaa | 4664 | { |
734e1499 PH |
4665 | expand_string_message = string_sprintf("failed to connect to socket " |
4666 | "%s: %s", sub_arg[0], strerror(errno)); | |
a401ddaa PH |
4667 | goto SOCK_FAIL; |
4668 | } | |
059ec3d9 | 4669 | } |
1cce3af8 | 4670 | |
059ec3d9 PH |
4671 | DEBUG(D_expand) debug_printf("connected to socket %s\n", sub_arg[0]); |
4672 | ||
567e584c JH |
4673 | /* Allow sequencing of test actions */ |
4674 | if (running_in_test_harness) millisleep(100); | |
4675 | ||
059ec3d9 PH |
4676 | /* Write the request string, if not empty */ |
4677 | ||
4678 | if (sub_arg[1][0] != 0) | |
4679 | { | |
4680 | int len = Ustrlen(sub_arg[1]); | |
4681 | DEBUG(D_expand) debug_printf("writing \"%s\" to socket\n", | |
4682 | sub_arg[1]); | |
4683 | if (write(fd, sub_arg[1], len) != len) | |
4684 | { | |
4685 | expand_string_message = string_sprintf("request write to socket " | |
4686 | "failed: %s", strerror(errno)); | |
4687 | goto SOCK_FAIL; | |
4688 | } | |
4689 | } | |
4690 | ||
c1114884 PH |
4691 | /* Shut down the sending side of the socket. This helps some servers to |
4692 | recognise that it is their turn to do some work. Just in case some | |
4693 | system doesn't have this function, make it conditional. */ | |
4694 | ||
4695 | #ifdef SHUT_WR | |
4696 | shutdown(fd, SHUT_WR); | |
4697 | #endif | |
4698 | ||
567e584c JH |
4699 | if (running_in_test_harness) millisleep(100); |
4700 | ||
059ec3d9 PH |
4701 | /* Now we need to read from the socket, under a timeout. The function |
4702 | that reads a file can be used. */ | |
4703 | ||
4704 | f = fdopen(fd, "rb"); | |
4705 | sigalrm_seen = FALSE; | |
4706 | alarm(timeout); | |
4707 | yield = cat_file(f, yield, &size, &ptr, sub_arg[3]); | |
4708 | alarm(0); | |
f1e894f3 | 4709 | (void)fclose(f); |
059ec3d9 PH |
4710 | |
4711 | /* After a timeout, we restore the pointer in the result, that is, | |
4712 | make sure we add nothing from the socket. */ | |
4713 | ||
4714 | if (sigalrm_seen) | |
4715 | { | |
4716 | ptr = save_ptr; | |
1cce3af8 | 4717 | expand_string_message = US "socket read timed out"; |
059ec3d9 PH |
4718 | goto SOCK_FAIL; |
4719 | } | |
4720 | } | |
4721 | ||
4722 | /* The whole thing has worked (or we were skipping). If there is a | |
4723 | failure string following, we need to skip it. */ | |
4724 | ||
4725 | if (*s == '{') | |
4726 | { | |
b0e85a8f | 4727 | if (expand_string_internal(s+1, TRUE, &s, TRUE, TRUE, &resetok) == NULL) |
059ec3d9 PH |
4728 | goto EXPAND_FAILED; |
4729 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4730 | while (isspace(*s)) s++; | |
4731 | } | |
4732 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4733 | continue; | |
4734 | ||
4735 | /* Come here on failure to create socket, connect socket, write to the | |
4736 | socket, or timeout on reading. If another substring follows, expand and | |
4737 | use it. Otherwise, those conditions give expand errors. */ | |
4738 | ||
4739 | SOCK_FAIL: | |
4740 | if (*s != '{') goto EXPAND_FAILED; | |
4741 | DEBUG(D_any) debug_printf("%s\n", expand_string_message); | |
b0e85a8f | 4742 | arg = expand_string_internal(s+1, TRUE, &s, FALSE, TRUE, &resetok); |
059ec3d9 PH |
4743 | if (arg == NULL) goto EXPAND_FAILED; |
4744 | yield = string_cat(yield, &size, &ptr, arg, Ustrlen(arg)); | |
4745 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4746 | while (isspace(*s)) s++; | |
4747 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4748 | continue; | |
4749 | } | |
4750 | ||
4751 | /* Handle "run" to execute a program. */ | |
4752 | ||
4753 | case EITEM_RUN: | |
4754 | { | |
4755 | FILE *f; | |
059ec3d9 PH |
4756 | uschar *arg; |
4757 | uschar **argv; | |
4758 | pid_t pid; | |
4759 | int fd_in, fd_out; | |
4760 | int lsize = 0; | |
4761 | int lptr = 0; | |
4762 | ||
4763 | if ((expand_forbid & RDO_RUN) != 0) | |
4764 | { | |
4765 | expand_string_message = US"running a command is not permitted"; | |
4766 | goto EXPAND_FAILED; | |
4767 | } | |
4768 | ||
4769 | while (isspace(*s)) s++; | |
4770 | if (*s != '{') goto EXPAND_FAILED_CURLY; | |
b0e85a8f | 4771 | arg = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
059ec3d9 PH |
4772 | if (arg == NULL) goto EXPAND_FAILED; |
4773 | while (isspace(*s)) s++; | |
4774 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
4775 | ||
4776 | if (skipping) /* Just pretend it worked when we're skipping */ | |
4777 | { | |
4778 | runrc = 0; | |
4779 | } | |
4780 | else | |
4781 | { | |
4782 | if (!transport_set_up_command(&argv, /* anchor for arg list */ | |
4783 | arg, /* raw command */ | |
4784 | FALSE, /* don't expand the arguments */ | |
4785 | 0, /* not relevant when... */ | |
4786 | NULL, /* no transporting address */ | |
4787 | US"${run} expansion", /* for error messages */ | |
4788 | &expand_string_message)) /* where to put error message */ | |
4789 | { | |
4790 | goto EXPAND_FAILED; | |
4791 | } | |
4792 | ||
4793 | /* Create the child process, making it a group leader. */ | |
4794 | ||
4795 | pid = child_open(argv, NULL, 0077, &fd_in, &fd_out, TRUE); | |
4796 | ||
4797 | if (pid < 0) | |
4798 | { | |
4799 | expand_string_message = | |
4800 | string_sprintf("couldn't create child process: %s", strerror(errno)); | |
4801 | goto EXPAND_FAILED; | |
4802 | } | |
4803 | ||
4804 | /* Nothing is written to the standard input. */ | |
4805 | ||
f1e894f3 | 4806 | (void)close(fd_in); |
059ec3d9 | 4807 | |
ac53fcda PP |
4808 | /* Read the pipe to get the command's output into $value (which is kept |
4809 | in lookup_value). Read during execution, so that if the output exceeds | |
4810 | the OS pipe buffer limit, we don't block forever. */ | |
4811 | ||
4812 | f = fdopen(fd_out, "rb"); | |
4813 | sigalrm_seen = FALSE; | |
4814 | alarm(60); | |
4815 | lookup_value = cat_file(f, lookup_value, &lsize, &lptr, NULL); | |
4816 | alarm(0); | |
4817 | (void)fclose(f); | |
4818 | ||
059ec3d9 PH |
4819 | /* Wait for the process to finish, applying the timeout, and inspect its |
4820 | return code for serious disasters. Simple non-zero returns are passed on. | |
4821 | */ | |
4822 | ||
ac53fcda | 4823 | if (sigalrm_seen == TRUE || (runrc = child_close(pid, 30)) < 0) |
059ec3d9 | 4824 | { |
ac53fcda | 4825 | if (sigalrm_seen == TRUE || runrc == -256) |
059ec3d9 PH |
4826 | { |
4827 | expand_string_message = string_sprintf("command timed out"); | |
4828 | killpg(pid, SIGKILL); /* Kill the whole process group */ | |
4829 | } | |
4830 | ||
4831 | else if (runrc == -257) | |
4832 | expand_string_message = string_sprintf("wait() failed: %s", | |
4833 | strerror(errno)); | |
4834 | ||
4835 | else | |
4836 | expand_string_message = string_sprintf("command killed by signal %d", | |
4837 | -runrc); | |
4838 | ||
4839 | goto EXPAND_FAILED; | |
4840 | } | |
059ec3d9 PH |
4841 | } |
4842 | ||
d20976dc | 4843 | /* Process the yes/no strings; $value may be useful in both cases */ |
059ec3d9 PH |
4844 | |
4845 | switch(process_yesno( | |
4846 | skipping, /* were previously skipping */ | |
4847 | runrc == 0, /* success/failure indicator */ | |
d20976dc | 4848 | lookup_value, /* value to reset for string2 */ |
059ec3d9 PH |
4849 | &s, /* input pointer */ |
4850 | &yield, /* output pointer */ | |
4851 | &size, /* output size */ | |
4852 | &ptr, /* output current point */ | |
b0e85a8f JH |
4853 | US"run", /* condition type */ |
4854 | &resetok)) | |
059ec3d9 PH |
4855 | { |
4856 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
4857 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
4858 | } | |
4859 | ||
4860 | continue; | |
4861 | } | |
4862 | ||
4863 | /* Handle character translation for "tr" */ | |
4864 | ||
4865 | case EITEM_TR: | |
4866 | { | |
4867 | int oldptr = ptr; | |
4868 | int o2m; | |
4869 | uschar *sub[3]; | |
4870 | ||
b0e85a8f | 4871 | switch(read_subs(sub, 3, 3, &s, skipping, TRUE, US"tr", &resetok)) |
059ec3d9 PH |
4872 | { |
4873 | case 1: goto EXPAND_FAILED_CURLY; | |
4874 | case 2: | |
4875 | case 3: goto EXPAND_FAILED; | |
4876 | } | |
4877 | ||
4878 | yield = string_cat(yield, &size, &ptr, sub[0], Ustrlen(sub[0])); | |
4879 | o2m = Ustrlen(sub[2]) - 1; | |
4880 | ||
4881 | if (o2m >= 0) for (; oldptr < ptr; oldptr++) | |
4882 | { | |
4883 | uschar *m = Ustrrchr(sub[1], yield[oldptr]); | |
4884 | if (m != NULL) | |
4885 | { | |
4886 | int o = m - sub[1]; | |
4887 | yield[oldptr] = sub[2][(o < o2m)? o : o2m]; | |
4888 | } | |
4889 | } | |
4890 | ||
4891 | continue; | |
4892 | } | |
4893 | ||
4894 | /* Handle "hash", "length", "nhash", and "substr" when they are given with | |
4895 | expanded arguments. */ | |
4896 | ||
4897 | case EITEM_HASH: | |
4898 | case EITEM_LENGTH: | |
4899 | case EITEM_NHASH: | |
4900 | case EITEM_SUBSTR: | |
4901 | { | |
4902 | int i; | |
4903 | int len; | |
4904 | uschar *ret; | |
4905 | int val[2] = { 0, -1 }; | |
4906 | uschar *sub[3]; | |
4907 | ||
4908 | /* "length" takes only 2 arguments whereas the others take 2 or 3. | |
2e23003a | 4909 | Ensure that sub[2] is set in the ${length } case. */ |
059ec3d9 PH |
4910 | |
4911 | sub[2] = NULL; | |
4912 | switch(read_subs(sub, (item_type == EITEM_LENGTH)? 2:3, 2, &s, skipping, | |
b0e85a8f | 4913 | TRUE, name, &resetok)) |
059ec3d9 PH |
4914 | { |
4915 | case 1: goto EXPAND_FAILED_CURLY; | |
4916 | case 2: | |
4917 | case 3: goto EXPAND_FAILED; | |
4918 | } | |
4919 | ||
4920 | /* Juggle the arguments if there are only two of them: always move the | |
4921 | string to the last position and make ${length{n}{str}} equivalent to | |
4922 | ${substr{0}{n}{str}}. See the defaults for val[] above. */ | |
4923 | ||
4924 | if (sub[2] == NULL) | |
4925 | { | |
4926 | sub[2] = sub[1]; | |
4927 | sub[1] = NULL; | |
4928 | if (item_type == EITEM_LENGTH) | |
4929 | { | |
4930 | sub[1] = sub[0]; | |
4931 | sub[0] = NULL; | |
4932 | } | |
4933 | } | |
4934 | ||
4935 | for (i = 0; i < 2; i++) | |
4936 | { | |
4937 | if (sub[i] == NULL) continue; | |
4938 | val[i] = (int)Ustrtol(sub[i], &ret, 10); | |
4939 | if (*ret != 0 || (i != 0 && val[i] < 0)) | |
4940 | { | |
4941 | expand_string_message = string_sprintf("\"%s\" is not a%s number " | |
4942 | "(in \"%s\" expansion)", sub[i], (i != 0)? " positive" : "", name); | |
4943 | goto EXPAND_FAILED; | |
4944 | } | |
4945 | } | |
4946 | ||
4947 | ret = | |
4948 | (item_type == EITEM_HASH)? | |
4949 | compute_hash(sub[2], val[0], val[1], &len) : | |
4950 | (item_type == EITEM_NHASH)? | |
4951 | compute_nhash(sub[2], val[0], val[1], &len) : | |
4952 | extract_substr(sub[2], val[0], val[1], &len); | |
4953 | ||
4954 | if (ret == NULL) goto EXPAND_FAILED; | |
4955 | yield = string_cat(yield, &size, &ptr, ret, len); | |
4956 | continue; | |
4957 | } | |
4958 | ||
4959 | /* Handle HMAC computation: ${hmac{<algorithm>}{<secret>}{<text>}} | |
4960 | This code originally contributed by Steve Haslam. It currently supports | |
4961 | the use of MD5 and SHA-1 hashes. | |
4962 | ||
4963 | We need some workspace that is large enough to handle all the supported | |
4964 | hash types. Use macros to set the sizes rather than be too elaborate. */ | |
4965 | ||
4966 | #define MAX_HASHLEN 20 | |
4967 | #define MAX_HASHBLOCKLEN 64 | |
4968 | ||
4969 | case EITEM_HMAC: | |
4970 | { | |
4971 | uschar *sub[3]; | |
4972 | md5 md5_base; | |
4973 | sha1 sha1_base; | |
4974 | void *use_base; | |
4975 | int type, i; | |
4976 | int hashlen; /* Number of octets for the hash algorithm's output */ | |
4977 | int hashblocklen; /* Number of octets the hash algorithm processes */ | |
4978 | uschar *keyptr, *p; | |
4979 | unsigned int keylen; | |
4980 | ||
4981 | uschar keyhash[MAX_HASHLEN]; | |
4982 | uschar innerhash[MAX_HASHLEN]; | |
4983 | uschar finalhash[MAX_HASHLEN]; | |
4984 | uschar finalhash_hex[2*MAX_HASHLEN]; | |
4985 | uschar innerkey[MAX_HASHBLOCKLEN]; | |
4986 | uschar outerkey[MAX_HASHBLOCKLEN]; | |
4987 | ||
b0e85a8f | 4988 | switch (read_subs(sub, 3, 3, &s, skipping, TRUE, name, &resetok)) |
059ec3d9 PH |
4989 | { |
4990 | case 1: goto EXPAND_FAILED_CURLY; | |
4991 | case 2: | |
4992 | case 3: goto EXPAND_FAILED; | |
4993 | } | |
4994 | ||
4995 | if (Ustrcmp(sub[0], "md5") == 0) | |
4996 | { | |
4997 | type = HMAC_MD5; | |
4998 | use_base = &md5_base; | |
4999 | hashlen = 16; | |
5000 | hashblocklen = 64; | |
5001 | } | |
5002 | else if (Ustrcmp(sub[0], "sha1") == 0) | |
5003 | { | |
5004 | type = HMAC_SHA1; | |
5005 | use_base = &sha1_base; | |
5006 | hashlen = 20; | |
5007 | hashblocklen = 64; | |
5008 | } | |
5009 | else | |
5010 | { | |
5011 | expand_string_message = | |
5012 | string_sprintf("hmac algorithm \"%s\" is not recognised", sub[0]); | |
5013 | goto EXPAND_FAILED; | |
5014 | } | |
5015 | ||
5016 | keyptr = sub[1]; | |
5017 | keylen = Ustrlen(keyptr); | |
5018 | ||
5019 | /* If the key is longer than the hash block length, then hash the key | |
5020 | first */ | |
5021 | ||
5022 | if (keylen > hashblocklen) | |
5023 | { | |
5024 | chash_start(type, use_base); | |
5025 | chash_end(type, use_base, keyptr, keylen, keyhash); | |
5026 | keyptr = keyhash; | |
5027 | keylen = hashlen; | |
5028 | } | |
5029 | ||
5030 | /* Now make the inner and outer key values */ | |
5031 | ||
5032 | memset(innerkey, 0x36, hashblocklen); | |
5033 | memset(outerkey, 0x5c, hashblocklen); | |
5034 | ||
5035 | for (i = 0; i < keylen; i++) | |
5036 | { | |
5037 | innerkey[i] ^= keyptr[i]; | |
5038 | outerkey[i] ^= keyptr[i]; | |
5039 | } | |
5040 | ||
5041 | /* Now do the hashes */ | |
5042 | ||
5043 | chash_start(type, use_base); | |
5044 | chash_mid(type, use_base, innerkey); | |
5045 | chash_end(type, use_base, sub[2], Ustrlen(sub[2]), innerhash); | |
5046 | ||
5047 | chash_start(type, use_base); | |
5048 | chash_mid(type, use_base, outerkey); | |
5049 | chash_end(type, use_base, innerhash, hashlen, finalhash); | |
5050 | ||
5051 | /* Encode the final hash as a hex string */ | |
5052 | ||
5053 | p = finalhash_hex; | |
5054 | for (i = 0; i < hashlen; i++) | |
5055 | { | |
5056 | *p++ = hex_digits[(finalhash[i] & 0xf0) >> 4]; | |
5057 | *p++ = hex_digits[finalhash[i] & 0x0f]; | |
5058 | } | |
5059 | ||
5060 | DEBUG(D_any) debug_printf("HMAC[%s](%.*s,%.*s)=%.*s\n", sub[0], | |
5061 | (int)keylen, keyptr, Ustrlen(sub[2]), sub[2], hashlen*2, finalhash_hex); | |
5062 | ||
5063 | yield = string_cat(yield, &size, &ptr, finalhash_hex, hashlen*2); | |
5064 | } | |
5065 | ||
5066 | continue; | |
5067 | ||
5068 | /* Handle global substitution for "sg" - like Perl's s/xxx/yyy/g operator. | |
5069 | We have to save the numerical variables and restore them afterwards. */ | |
5070 | ||
5071 | case EITEM_SG: | |
5072 | { | |
5073 | const pcre *re; | |
5074 | int moffset, moffsetextra, slen; | |
5075 | int roffset; | |
5076 | int emptyopt; | |
5077 | const uschar *rerror; | |
5078 | uschar *subject; | |
5079 | uschar *sub[3]; | |
5080 | int save_expand_nmax = | |
5081 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5082 | ||
b0e85a8f | 5083 | switch(read_subs(sub, 3, 3, &s, skipping, TRUE, US"sg", &resetok)) |
059ec3d9 PH |
5084 | { |
5085 | case 1: goto EXPAND_FAILED_CURLY; | |
5086 | case 2: | |
5087 | case 3: goto EXPAND_FAILED; | |
5088 | } | |
5089 | ||
5090 | /* Compile the regular expression */ | |
5091 | ||
5092 | re = pcre_compile(CS sub[1], PCRE_COPT, (const char **)&rerror, &roffset, | |
5093 | NULL); | |
5094 | ||
5095 | if (re == NULL) | |
5096 | { | |
5097 | expand_string_message = string_sprintf("regular expression error in " | |
5098 | "\"%s\": %s at offset %d", sub[1], rerror, roffset); | |
5099 | goto EXPAND_FAILED; | |
5100 | } | |
5101 | ||
5102 | /* Now run a loop to do the substitutions as often as necessary. It ends | |
5103 | when there are no more matches. Take care over matches of the null string; | |
5104 | do the same thing as Perl does. */ | |
5105 | ||
5106 | subject = sub[0]; | |
5107 | slen = Ustrlen(sub[0]); | |
5108 | moffset = moffsetextra = 0; | |
5109 | emptyopt = 0; | |
5110 | ||
5111 | for (;;) | |
5112 | { | |
5113 | int ovector[3*(EXPAND_MAXN+1)]; | |
5114 | int n = pcre_exec(re, NULL, CS subject, slen, moffset + moffsetextra, | |
5115 | PCRE_EOPT | emptyopt, ovector, sizeof(ovector)/sizeof(int)); | |
5116 | int nn; | |
5117 | uschar *insert; | |
5118 | ||
5119 | /* No match - if we previously set PCRE_NOTEMPTY after a null match, this | |
5120 | is not necessarily the end. We want to repeat the match from one | |
5121 | character further along, but leaving the basic offset the same (for | |
5122 | copying below). We can't be at the end of the string - that was checked | |
5123 | before setting PCRE_NOTEMPTY. If PCRE_NOTEMPTY is not set, we are | |
5124 | finished; copy the remaining string and end the loop. */ | |
5125 | ||
5126 | if (n < 0) | |
5127 | { | |
5128 | if (emptyopt != 0) | |
5129 | { | |
5130 | moffsetextra = 1; | |
5131 | emptyopt = 0; | |
5132 | continue; | |
5133 | } | |
5134 | yield = string_cat(yield, &size, &ptr, subject+moffset, slen-moffset); | |
5135 | break; | |
5136 | } | |
5137 | ||
5138 | /* Match - set up for expanding the replacement. */ | |
5139 | ||
5140 | if (n == 0) n = EXPAND_MAXN + 1; | |
5141 | expand_nmax = 0; | |
5142 | for (nn = 0; nn < n*2; nn += 2) | |
5143 | { | |
5144 | expand_nstring[expand_nmax] = subject + ovector[nn]; | |
5145 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; | |
5146 | } | |
5147 | expand_nmax--; | |
5148 | ||
5149 | /* Copy the characters before the match, plus the expanded insertion. */ | |
5150 | ||
5151 | yield = string_cat(yield, &size, &ptr, subject + moffset, | |
5152 | ovector[0] - moffset); | |
5153 | insert = expand_string(sub[2]); | |
5154 | if (insert == NULL) goto EXPAND_FAILED; | |
5155 | yield = string_cat(yield, &size, &ptr, insert, Ustrlen(insert)); | |
5156 | ||
5157 | moffset = ovector[1]; | |
5158 | moffsetextra = 0; | |
5159 | emptyopt = 0; | |
5160 | ||
5161 | /* If we have matched an empty string, first check to see if we are at | |
5162 | the end of the subject. If so, the loop is over. Otherwise, mimic | |
5163 | what Perl's /g options does. This turns out to be rather cunning. First | |
5164 | we set PCRE_NOTEMPTY and PCRE_ANCHORED and try the match a non-empty | |
5165 | string at the same point. If this fails (picked up above) we advance to | |
5166 | the next character. */ | |
5167 | ||
5168 | if (ovector[0] == ovector[1]) | |
5169 | { | |
5170 | if (ovector[0] == slen) break; | |
5171 | emptyopt = PCRE_NOTEMPTY | PCRE_ANCHORED; | |
5172 | } | |
5173 | } | |
5174 | ||
5175 | /* All done - restore numerical variables. */ | |
5176 | ||
5177 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5178 | save_expand_nlength); | |
5179 | continue; | |
5180 | } | |
5181 | ||
5182 | /* Handle keyed and numbered substring extraction. If the first argument | |
5183 | consists entirely of digits, then a numerical extraction is assumed. */ | |
5184 | ||
5185 | case EITEM_EXTRACT: | |
5186 | { | |
5187 | int i; | |
5188 | int j = 2; | |
5189 | int field_number = 1; | |
5190 | BOOL field_number_set = FALSE; | |
5191 | uschar *save_lookup_value = lookup_value; | |
5192 | uschar *sub[3]; | |
5193 | int save_expand_nmax = | |
5194 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5195 | ||
5196 | /* Read the arguments */ | |
5197 | ||
5198 | for (i = 0; i < j; i++) | |
5199 | { | |
5200 | while (isspace(*s)) s++; | |
aa26e137 | 5201 | if (*s == '{') /*}*/ |
059ec3d9 | 5202 | { |
b0e85a8f JH |
5203 | sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); |
5204 | if (sub[i] == NULL) goto EXPAND_FAILED; /*{*/ | |
059ec3d9 PH |
5205 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; |
5206 | ||
5207 | /* After removal of leading and trailing white space, the first | |
5208 | argument must not be empty; if it consists entirely of digits | |
5209 | (optionally preceded by a minus sign), this is a numerical | |
5210 | extraction, and we expect 3 arguments. */ | |
5211 | ||
5212 | if (i == 0) | |
5213 | { | |
5214 | int len; | |
5215 | int x = 0; | |
5216 | uschar *p = sub[0]; | |
5217 | ||
5218 | while (isspace(*p)) p++; | |
5219 | sub[0] = p; | |
5220 | ||
5221 | len = Ustrlen(p); | |
5222 | while (len > 0 && isspace(p[len-1])) len--; | |
5223 | p[len] = 0; | |
5224 | ||
e2803e40 | 5225 | if (*p == 0 && !skipping) |
059ec3d9 | 5226 | { |
554d2369 TF |
5227 | expand_string_message = US"first argument of \"extract\" must " |
5228 | "not be empty"; | |
059ec3d9 PH |
5229 | goto EXPAND_FAILED; |
5230 | } | |
5231 | ||
5232 | if (*p == '-') | |
5233 | { | |
5234 | field_number = -1; | |
5235 | p++; | |
5236 | } | |
5237 | while (*p != 0 && isdigit(*p)) x = x * 10 + *p++ - '0'; | |
5238 | if (*p == 0) | |
5239 | { | |
5240 | field_number *= x; | |
5241 | j = 3; /* Need 3 args */ | |
5242 | field_number_set = TRUE; | |
5243 | } | |
5244 | } | |
5245 | } | |
5246 | else goto EXPAND_FAILED_CURLY; | |
5247 | } | |
5248 | ||
5249 | /* Extract either the numbered or the keyed substring into $value. If | |
5250 | skipping, just pretend the extraction failed. */ | |
5251 | ||
5252 | lookup_value = skipping? NULL : field_number_set? | |
5253 | expand_gettokened(field_number, sub[1], sub[2]) : | |
5254 | expand_getkeyed(sub[0], sub[1]); | |
5255 | ||
5256 | /* If no string follows, $value gets substituted; otherwise there can | |
5257 | be yes/no strings, as for lookup or if. */ | |
5258 | ||
aa26e137 JH |
5259 | switch(process_yesno( |
5260 | skipping, /* were previously skipping */ | |
5261 | lookup_value != NULL, /* success/failure indicator */ | |
5262 | save_lookup_value, /* value to reset for string2 */ | |
5263 | &s, /* input pointer */ | |
5264 | &yield, /* output pointer */ | |
5265 | &size, /* output size */ | |
5266 | &ptr, /* output current point */ | |
5267 | US"extract", /* condition type */ | |
5268 | &resetok)) | |
5269 | { | |
5270 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5271 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5272 | } | |
5273 | ||
5274 | /* All done - restore numerical variables. */ | |
5275 | ||
5276 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5277 | save_expand_nlength); | |
5278 | ||
5279 | continue; | |
5280 | } | |
5281 | ||
5282 | /* return the Nth item from a list */ | |
5283 | ||
5284 | case EITEM_LISTEXTRACT: | |
5285 | { | |
5286 | int i; | |
5287 | int field_number = 1; | |
5288 | uschar *save_lookup_value = lookup_value; | |
5289 | uschar *sub[2]; | |
5290 | int save_expand_nmax = | |
5291 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5292 | ||
5293 | /* Read the field & list arguments */ | |
5294 | ||
5295 | for (i = 0; i < 2; i++) | |
5296 | { | |
5297 | while (isspace(*s)) s++; | |
5298 | if (*s != '{') /*}*/ | |
5299 | goto EXPAND_FAILED_CURLY; | |
5300 | ||
5301 | sub[i] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
5302 | if (!sub[i]) goto EXPAND_FAILED; /*{*/ | |
5303 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5304 | ||
5305 | /* After removal of leading and trailing white space, the first | |
5306 | argument must be numeric and nonempty. */ | |
5307 | ||
5308 | if (i == 0) | |
5309 | { | |
5310 | int len; | |
5311 | int x = 0; | |
5312 | uschar *p = sub[0]; | |
5313 | ||
5314 | while (isspace(*p)) p++; | |
5315 | sub[0] = p; | |
5316 | ||
5317 | len = Ustrlen(p); | |
5318 | while (len > 0 && isspace(p[len-1])) len--; | |
5319 | p[len] = 0; | |
5320 | ||
5321 | if (!*p && !skipping) | |
5322 | { | |
5323 | expand_string_message = US"first argument of \"listextract\" must " | |
5324 | "not be empty"; | |
5325 | goto EXPAND_FAILED; | |
5326 | } | |
5327 | ||
5328 | if (*p == '-') | |
5329 | { | |
5330 | field_number = -1; | |
5331 | p++; | |
5332 | } | |
5333 | while (*p && isdigit(*p)) x = x * 10 + *p++ - '0'; | |
5334 | if (*p) | |
5335 | { | |
5336 | expand_string_message = US"first argument of \"listextract\" must " | |
5337 | "be numeric"; | |
5338 | goto EXPAND_FAILED; | |
5339 | } | |
5340 | field_number *= x; | |
5341 | } | |
5342 | } | |
5343 | ||
5344 | /* Extract the numbered element into $value. If | |
5345 | skipping, just pretend the extraction failed. */ | |
5346 | ||
5347 | lookup_value = skipping? NULL : expand_getlistele(field_number, sub[1]); | |
5348 | ||
5349 | /* If no string follows, $value gets substituted; otherwise there can | |
5350 | be yes/no strings, as for lookup or if. */ | |
5351 | ||
059ec3d9 PH |
5352 | switch(process_yesno( |
5353 | skipping, /* were previously skipping */ | |
5354 | lookup_value != NULL, /* success/failure indicator */ | |
5355 | save_lookup_value, /* value to reset for string2 */ | |
5356 | &s, /* input pointer */ | |
5357 | &yield, /* output pointer */ | |
5358 | &size, /* output size */ | |
5359 | &ptr, /* output current point */ | |
b0e85a8f JH |
5360 | US"extract", /* condition type */ |
5361 | &resetok)) | |
059ec3d9 PH |
5362 | { |
5363 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5364 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5365 | } | |
5366 | ||
5367 | /* All done - restore numerical variables. */ | |
5368 | ||
5369 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5370 | save_expand_nlength); | |
5371 | ||
5372 | continue; | |
5373 | } | |
1a46a8c5 | 5374 | |
9d1c15ef JH |
5375 | #ifdef SUPPORT_TLS |
5376 | case EITEM_CERTEXTRACT: | |
5377 | { | |
9d1c15ef JH |
5378 | uschar *save_lookup_value = lookup_value; |
5379 | uschar *sub[2]; | |
5380 | int save_expand_nmax = | |
5381 | save_expand_strings(save_expand_nstring, save_expand_nlength); | |
5382 | ||
5383 | /* Read the field argument */ | |
5384 | while (isspace(*s)) s++; | |
5385 | if (*s != '{') /*}*/ | |
5386 | goto EXPAND_FAILED_CURLY; | |
5387 | sub[0] = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
5388 | if (!sub[0]) goto EXPAND_FAILED; /*{*/ | |
5389 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5390 | /* strip spaces fore & aft */ | |
5391 | { | |
5392 | int len; | |
9d1c15ef JH |
5393 | uschar *p = sub[0]; |
5394 | ||
5395 | while (isspace(*p)) p++; | |
5396 | sub[0] = p; | |
5397 | ||
5398 | len = Ustrlen(p); | |
5399 | while (len > 0 && isspace(p[len-1])) len--; | |
5400 | p[len] = 0; | |
5401 | } | |
5402 | ||
5403 | /* inspect the cert argument */ | |
5404 | while (isspace(*s)) s++; | |
5405 | if (*s != '{') /*}*/ | |
5406 | goto EXPAND_FAILED_CURLY; | |
5407 | if (*++s != '$') | |
5408 | { | |
5409 | expand_string_message = US"second argument of \"certextract\" must " | |
5410 | "be a certificate variable"; | |
5411 | goto EXPAND_FAILED; | |
5412 | } | |
5413 | sub[1] = expand_string_internal(s+1, TRUE, &s, skipping, FALSE, &resetok); | |
5414 | if (!sub[1]) goto EXPAND_FAILED; /*{*/ | |
5415 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5416 | ||
5417 | if (skipping) | |
5418 | lookup_value = NULL; | |
5419 | else | |
5420 | { | |
5421 | lookup_value = expand_getcertele(sub[0], sub[1]); | |
5422 | if (*expand_string_message) goto EXPAND_FAILED; | |
5423 | } | |
5424 | switch(process_yesno( | |
5425 | skipping, /* were previously skipping */ | |
5426 | lookup_value != NULL, /* success/failure indicator */ | |
5427 | save_lookup_value, /* value to reset for string2 */ | |
5428 | &s, /* input pointer */ | |
5429 | &yield, /* output pointer */ | |
5430 | &size, /* output size */ | |
5431 | &ptr, /* output current point */ | |
5432 | US"extract", /* condition type */ | |
5433 | &resetok)) | |
5434 | { | |
5435 | case 1: goto EXPAND_FAILED; /* when all is well, the */ | |
5436 | case 2: goto EXPAND_FAILED_CURLY; /* returned value is 0 */ | |
5437 | } | |
5438 | ||
5439 | restore_expand_strings(save_expand_nmax, save_expand_nstring, | |
5440 | save_expand_nlength); | |
5441 | continue; | |
5442 | } | |
5443 | #endif /*SUPPORT_TLS*/ | |
5444 | ||
29f89cad PH |
5445 | /* Handle list operations */ |
5446 | ||
5447 | case EITEM_FILTER: | |
5448 | case EITEM_MAP: | |
5449 | case EITEM_REDUCE: | |
5450 | { | |
5451 | int sep = 0; | |
5452 | int save_ptr = ptr; | |
5453 | uschar outsep[2] = { '\0', '\0' }; | |
5454 | uschar *list, *expr, *temp; | |
5455 | uschar *save_iterate_item = iterate_item; | |
5456 | uschar *save_lookup_value = lookup_value; | |
5457 | ||
5458 | while (isspace(*s)) s++; | |
5459 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
5460 | ||
b0e85a8f | 5461 | list = expand_string_internal(s, TRUE, &s, skipping, TRUE, &resetok); |
29f89cad PH |
5462 | if (list == NULL) goto EXPAND_FAILED; |
5463 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5464 | ||
5465 | if (item_type == EITEM_REDUCE) | |
5466 | { | |
5467 | while (isspace(*s)) s++; | |
5468 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
b0e85a8f | 5469 | temp = expand_string_internal(s, TRUE, &s, skipping, TRUE, &resetok); |
29f89cad PH |
5470 | if (temp == NULL) goto EXPAND_FAILED; |
5471 | lookup_value = temp; | |
5472 | if (*s++ != '}') goto EXPAND_FAILED_CURLY; | |
5473 | } | |
5474 | ||
5475 | while (isspace(*s)) s++; | |
5476 | if (*s++ != '{') goto EXPAND_FAILED_CURLY; | |
5477 | ||
5478 | expr = s; | |
5479 | ||
5480 | /* For EITEM_FILTER, call eval_condition once, with result discarded (as | |
5481 | if scanning a "false" part). This allows us to find the end of the | |
5482 | condition, because if the list is empty, we won't actually evaluate the | |
5483 | condition for real. For EITEM_MAP and EITEM_REDUCE, do the same, using | |
5484 | the normal internal expansion function. */ | |
5485 | ||
5486 | if (item_type == EITEM_FILTER) | |
5487 | { | |
b0e85a8f | 5488 | temp = eval_condition(expr, &resetok, NULL); |
29f89cad PH |
5489 | if (temp != NULL) s = temp; |
5490 | } | |
5491 | else | |
5492 | { | |
b0e85a8f | 5493 | temp = expand_string_internal(s, TRUE, &s, TRUE, TRUE, &resetok); |
29f89cad PH |
5494 | } |
5495 | ||
5496 | if (temp == NULL) | |
5497 | { | |
5498 | expand_string_message = string_sprintf("%s inside \"%s\" item", | |
5499 | expand_string_message, name); | |
5500 | goto EXPAND_FAILED; | |
5501 | } | |
5502 | ||
5503 | while (isspace(*s)) s++; | |
5504 | if (*s++ != '}') | |
2e23003a | 5505 | { /*{*/ |
29f89cad PH |
5506 | expand_string_message = string_sprintf("missing } at end of condition " |
5507 | "or expression inside \"%s\"", name); | |
5508 | goto EXPAND_FAILED; | |
5509 | } | |
5510 | ||
2e23003a | 5511 | while (isspace(*s)) s++; /*{*/ |
29f89cad | 5512 | if (*s++ != '}') |
2e23003a | 5513 | { /*{*/ |
29f89cad PH |
5514 | expand_string_message = string_sprintf("missing } at end of \"%s\"", |
5515 | name); | |
5516 | goto EXPAND_FAILED; | |
5517 | } | |
5518 | ||
5519 | /* If we are skipping, we can now just move on to the next item. When | |
5520 | processing for real, we perform the iteration. */ | |
5521 | ||
5522 | if (skipping) continue; | |
5523 | while ((iterate_item = string_nextinlist(&list, &sep, NULL, 0)) != NULL) | |
5524 | { | |
5525 | *outsep = (uschar)sep; /* Separator as a string */ | |
5526 | ||
5527 | DEBUG(D_expand) debug_printf("%s: $item = \"%s\"\n", name, iterate_item); | |
5528 | ||
5529 | if (item_type == EITEM_FILTER) | |
5530 | { | |
5531 | BOOL condresult; | |
b0e85a8f | 5532 | if (eval_condition(expr, &resetok, &condresult) == NULL) |
29f89cad | 5533 | { |
e58c13cc PH |
5534 | iterate_item = save_iterate_item; |
5535 | lookup_value = save_lookup_value; | |
29f89cad PH |
5536 | expand_string_message = string_sprintf("%s inside \"%s\" condition", |
5537 | expand_string_message, name); | |
5538 | goto EXPAND_FAILED; | |
5539 | } | |
5540 | DEBUG(D_expand) debug_printf("%s: condition is %s\n", name, | |
5541 | condresult? "true":"false"); | |
5542 | if (condresult) | |
5543 | temp = iterate_item; /* TRUE => include this item */ | |
5544 | else | |
5545 | continue; /* FALSE => skip this item */ | |
5546 | } | |
5547 | ||
5548 | /* EITEM_MAP and EITEM_REDUCE */ | |
5549 | ||
5550 | else | |
5551 | { | |
b0e85a8f | 5552 | temp = expand_string_internal(expr, TRUE, NULL, skipping, TRUE, &resetok); |
29f89cad PH |
5553 | if (temp == NULL) |
5554 | { | |
e58c13cc | 5555 | iterate_item = save_iterate_item; |
29f89cad PH |
5556 | expand_string_message = string_sprintf("%s inside \"%s\" item", |
5557 | expand_string_message, name); | |
5558 | goto EXPAND_FAILED; | |
5559 | } | |
5560 | if (item_type == EITEM_REDUCE) | |
5561 | { | |
5562 | lookup_value = temp; /* Update the value of $value */ | |
5563 | continue; /* and continue the iteration */ | |
5564 | } | |
5565 | } | |
5566 | ||
5567 | /* We reach here for FILTER if the condition is true, always for MAP, | |
5568 | and never for REDUCE. The value in "temp" is to be added to the output | |
5569 | list that is being created, ensuring that any occurrences of the | |
5570 | separator character are doubled. Unless we are dealing with the first | |
5571 | item of the output list, add in a space if the new item begins with the | |
5572 | separator character, or is an empty string. */ | |
5573 | ||
5574 | if (ptr != save_ptr && (temp[0] == *outsep || temp[0] == 0)) | |
5575 | yield = string_cat(yield, &size, &ptr, US" ", 1); | |
5576 | ||
5577 | /* Add the string in "temp" to the output list that we are building, | |
5578 | This is done in chunks by searching for the separator character. */ | |
5579 | ||
5580 | for (;;) | |
5581 | { | |
5582 | size_t seglen = Ustrcspn(temp, outsep); | |
5583 | yield = string_cat(yield, &size, &ptr, temp, seglen + 1); | |
5584 | ||
5585 | /* If we got to the end of the string we output one character | |
5586 | too many; backup and end the loop. Otherwise arrange to double the | |
5587 | separator. */ | |
5588 | ||
5589 | if (temp[seglen] == '\0') { ptr--; break; } | |
5590 | yield = string_cat(yield, &size, &ptr, outsep, 1); | |
5591 | temp += seglen + 1; | |
5592 | } | |
5593 | ||
5594 | /* Output a separator after the string: we will remove the redundant | |
5595 | final one at the end. */ | |
5596 | ||
5597 | yield = string_cat(yield, &size, &ptr, outsep, 1); | |
5598 | } /* End of iteration over the list loop */ | |
5599 | ||
5600 | /* REDUCE has generated no output above: output the final value of | |
5601 | $value. */ | |
5602 | ||
5603 | if (item_type == EITEM_REDUCE) | |
5604 | { | |
5605 | yield = string_cat(yield, &size, &ptr, lookup_value, | |
5606 | Ustrlen(lookup_value)); | |
5607 | lookup_value = save_lookup_value; /* Restore $value */ | |
5608 | } | |
5609 | ||
5610 | /* FILTER and MAP generate lists: if they have generated anything, remove | |
5611 | the redundant final separator. Even though an empty item at the end of a | |
5612 | list does not count, this is tidier. */ | |
5613 | ||
5614 | else if (ptr != save_ptr) ptr--; | |
5615 | ||
5616 | /* Restore preserved $item */ | |
5617 | ||
5618 | iterate_item = save_iterate_item; | |
5619 | continue; | |
5620 | } | |
5621 | ||
5622 | ||
2e23003a | 5623 | /* If ${dlfunc } support is configured, handle calling dynamically-loaded |
1a46a8c5 PH |
5624 | functions, unless locked out at this time. Syntax is ${dlfunc{file}{func}} |
5625 | or ${dlfunc{file}{func}{arg}} or ${dlfunc{file}{func}{arg1}{arg2}} or up to | |
5626 | a maximum of EXPAND_DLFUNC_MAX_ARGS arguments (defined below). */ | |
5627 | ||
5628 | #define EXPAND_DLFUNC_MAX_ARGS 8 | |
5629 | ||
5630 | case EITEM_DLFUNC: | |
5631 | #ifndef EXPAND_DLFUNC | |
2e23003a | 5632 | expand_string_message = US"\"${dlfunc\" encountered, but this facility " /*}*/ |
1a46a8c5 PH |
5633 | "is not included in this binary"; |
5634 | goto EXPAND_FAILED; | |
5635 | ||
5636 | #else /* EXPAND_DLFUNC */ | |
5637 | { | |
5638 | tree_node *t; | |
5639 | exim_dlfunc_t *func; | |
5640 | uschar *result; | |
5641 | int status, argc; | |
5642 | uschar *argv[EXPAND_DLFUNC_MAX_ARGS + 3]; | |
5643 | ||
5644 | if ((expand_forbid & RDO_DLFUNC) != 0) | |
5645 | { | |
5646 | expand_string_message = | |
5647 | US"dynamically-loaded functions are not permitted"; | |
5648 | goto EXPAND_FAILED; | |
5649 | } | |
5650 | ||
5651 | switch(read_subs(argv, EXPAND_DLFUNC_MAX_ARGS + 2, 2, &s, skipping, | |
b0e85a8f | 5652 | TRUE, US"dlfunc", &resetok)) |
1a46a8c5 PH |
5653 | { |
5654 | case 1: goto EXPAND_FAILED_CURLY; | |
5655 | case 2: | |
5656 | case 3: goto EXPAND_FAILED; | |
5657 | } | |
5658 | ||
5659 | /* If skipping, we don't actually do anything */ | |
5660 | ||
5661 | if (skipping) continue; | |
5662 | ||
5663 | /* Look up the dynamically loaded object handle in the tree. If it isn't | |
5664 | found, dlopen() the file and put the handle in the tree for next time. */ | |
5665 | ||
5666 | t = tree_search(dlobj_anchor, argv[0]); | |
5667 | if (t == NULL) | |
5668 | { | |
5669 | void *handle = dlopen(CS argv[0], RTLD_LAZY); | |
5670 | if (handle == NULL) | |
5671 | { | |
5672 | expand_string_message = string_sprintf("dlopen \"%s\" failed: %s", | |
5673 | argv[0], dlerror()); | |
5674 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", expand_string_message); | |
5675 | goto EXPAND_FAILED; | |
5676 | } | |
5677 | t = store_get_perm(sizeof(tree_node) + Ustrlen(argv[0])); | |
5678 | Ustrcpy(t->name, argv[0]); | |
5679 | t->data.ptr = handle; | |
5680 | (void)tree_insertnode(&dlobj_anchor, t); | |
5681 | } | |
5682 | ||
5683 | /* Having obtained the dynamically loaded object handle, look up the | |
5684 | function pointer. */ | |
5685 | ||
5686 | func = (exim_dlfunc_t *)dlsym(t->data.ptr, CS argv[1]); | |
5687 | if (func == NULL) | |
5688 | { | |
5689 | expand_string_message = string_sprintf("dlsym \"%s\" in \"%s\" failed: " | |
5690 | "%s", argv[1], argv[0], dlerror()); | |
7dbf77c9 | 5691 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", expand_string_message); |
1a46a8c5 PH |
5692 | goto EXPAND_FAILED; |
5693 | } | |
5694 | ||
5695 | /* Call the function and work out what to do with the result. If it | |
5696 | returns OK, we have a replacement string; if it returns DEFER then | |
5697 | expansion has failed in a non-forced manner; if it returns FAIL then | |
5698 | failure was forced; if it returns ERROR or any other value there's a | |
d6b4d938 TF |
5699 | problem, so panic slightly. In any case, assume that the function has |
5700 | side-effects on the store that must be preserved. */ | |
1a46a8c5 | 5701 | |
d6b4d938 | 5702 | resetok = FALSE; |
1a46a8c5 PH |
5703 | result = NULL; |
5704 | for (argc = 0; argv[argc] != NULL; argc++); | |
5705 | status = func(&result, argc - 2, &argv[2]); | |
5706 | if(status == OK) | |
5707 | { | |
5708 | if (result == NULL) result = US""; | |
5709 | yield = string_cat(yield, &size, &ptr, result, Ustrlen(result)); | |
5710 | continue; | |
5711 | } | |
5712 | else | |
5713 | { | |
5714 | expand_string_message = result == NULL ? US"(no message)" : result; | |
5715 | if(status == FAIL_FORCED) expand_string_forcedfail = TRUE; | |
5716 | else if(status != FAIL) | |
5717 | log_write(0, LOG_MAIN|LOG_PANIC, "dlfunc{%s}{%s} failed (%d): %s", | |
5718 | argv[0], argv[1], status, expand_string_message); | |
5719 | goto EXPAND_FAILED; | |
5720 | } | |
5721 | } | |
5722 | #endif /* EXPAND_DLFUNC */ | |
2e23003a | 5723 | } /* EITEM_* switch */ |
059ec3d9 PH |
5724 | |
5725 | /* Control reaches here if the name is not recognized as one of the more | |
5726 | complicated expansion items. Check for the "operator" syntax (name terminated | |
5727 | by a colon). Some of the operators have arguments, separated by _ from the | |
5728 | name. */ | |
5729 | ||
5730 | if (*s == ':') | |
5731 | { | |
5732 | int c; | |
5733 | uschar *arg = NULL; | |
6a8a60e0 | 5734 | uschar *sub; |
e3dd1d67 | 5735 | var_entry *vp = NULL; |
059ec3d9 PH |
5736 | |
5737 | /* Owing to an historical mis-design, an underscore may be part of the | |
5738 | operator name, or it may introduce arguments. We therefore first scan the | |
5739 | table of names that contain underscores. If there is no match, we cut off | |
5740 | the arguments and then scan the main table. */ | |
5741 | ||
6a8a60e0 JH |
5742 | if ((c = chop_match(name, op_table_underscore, |
5743 | sizeof(op_table_underscore)/sizeof(uschar *))) < 0) | |
059ec3d9 PH |
5744 | { |
5745 | arg = Ustrchr(name, '_'); | |
5746 | if (arg != NULL) *arg = 0; | |
5747 | c = chop_match(name, op_table_main, | |
5748 | sizeof(op_table_main)/sizeof(uschar *)); | |
5749 | if (c >= 0) c += sizeof(op_table_underscore)/sizeof(uschar *); | |
5750 | if (arg != NULL) *arg++ = '_'; /* Put back for error messages */ | |
5751 | } | |
5752 | ||
6a8a60e0 JH |
5753 | /* Deal specially with operators that might take a certificate variable |
5754 | as we do not want to do the usual expansion. For most, expand the string.*/ | |
5755 | switch(c) | |
5756 | { | |
80c974f8 | 5757 | #ifdef SUPPORT_TLS |
6a8a60e0 | 5758 | case EOP_MD5: |
9ef9101c JH |
5759 | case EOP_SHA1: |
5760 | case EOP_SHA256: | |
6a8a60e0 JH |
5761 | if (s[1] == '$') |
5762 | { | |
5763 | uschar * s1 = s; | |
5764 | sub = expand_string_internal(s+2, TRUE, &s1, skipping, | |
5765 | FALSE, &resetok); | |
5766 | if (!sub) goto EXPAND_FAILED; /*{*/ | |
5767 | if (*s1 != '}') goto EXPAND_FAILED_CURLY; | |
5768 | if ((vp = find_var_ent(sub)) && vp->type == vtype_cert) | |
5769 | { | |
5770 | s = s1+1; | |
5771 | break; | |
5772 | } | |
fabe4dd9 | 5773 | vp = NULL; |
6a8a60e0 | 5774 | } |
6a8a60e0 | 5775 | /*FALLTHROUGH*/ |
80c974f8 | 5776 | #endif |
6a8a60e0 JH |
5777 | default: |
5778 | sub = expand_string_internal(s+1, TRUE, &s, skipping, TRUE, &resetok); | |
5779 | if (!sub) goto EXPAND_FAILED; | |
5780 | s++; | |
5781 | break; | |
5782 | } | |
5783 | ||
059ec3d9 PH |
5784 | /* If we are skipping, we don't need to perform the operation at all. |
5785 | This matters for operations like "mask", because the data may not be | |
5786 | in the correct format when skipping. For example, the expression may test | |
5787 | for the existence of $sender_host_address before trying to mask it. For | |
5788 | other operations, doing them may not fail, but it is a waste of time. */ | |
5789 | ||
5790 | if (skipping && c >= 0) continue; | |
5791 | ||
5792 | /* Otherwise, switch on the operator type */ | |
5793 | ||
5794 | switch(c) | |
5795 | { | |
5796 | case EOP_BASE62: | |
5797 | { | |
5798 | uschar *t; | |
5799 | unsigned long int n = Ustrtoul(sub, &t, 10); | |
5800 | if (*t != 0) | |
5801 | { | |
5802 | expand_string_message = string_sprintf("argument for base62 " | |
5803 | "operator is \"%s\", which is not a decimal number", sub); | |
5804 | goto EXPAND_FAILED; | |
5805 | } | |
5806 | t = string_base62(n); | |
5807 | yield = string_cat(yield, &size, &ptr, t, Ustrlen(t)); | |
5808 | continue; | |
5809 | } | |
5810 | ||
9a799bc0 PH |
5811 | /* Note that for Darwin and Cygwin, BASE_62 actually has the value 36 */ |
5812 | ||
059ec3d9 PH |
5813 | case EOP_BASE62D: |
5814 | { | |
5815 | uschar buf[16]; | |
5816 | uschar *tt = sub; | |
5817 | unsigned long int n = 0; | |
5818 | while (*tt != 0) | |
5819 | { | |
5820 | uschar *t = Ustrchr(base62_chars, *tt++); | |
5821 | if (t == NULL) | |
5822 | { | |
5823 | expand_string_message = string_sprintf("argument for base62d " | |
9a799bc0 PH |
5824 | "operator is \"%s\", which is not a base %d number", sub, |
5825 | BASE_62); | |
059ec3d9 PH |
5826 | goto EXPAND_FAILED; |
5827 | } | |
9a799bc0 | 5828 | n = n * BASE_62 + (t - base62_chars); |
059ec3d9 PH |
5829 | } |
5830 | (void)sprintf(CS buf, "%ld", n); | |
5831 | yield = string_cat(yield, &size, &ptr, buf, Ustrlen(buf)); | |
5832 | continue; | |
5833 | } | |
5834 | ||
5835 | case EOP_EXPAND: | |
5836 | { | |
b0e85a8f | 5837 | uschar *expanded = expand_string_internal(sub, FALSE, NULL, skipping, TRUE, &resetok); |
059ec3d9 PH |
5838 | if (expanded == NULL) |
5839 | { | |
5840 | expand_string_message = | |
5841 | string_sprintf("internal expansion of \"%s\" failed: %s", sub, | |
5842 | expand_string_message); | |
5843 | goto EXPAND_FAILED; | |
5844 | } | |
5845 | yield = string_cat(yield, &size, &ptr, expanded, Ustrlen(expanded)); | |
5846 | continue; | |
5847 | } | |
5848 | ||
5849 | case EOP_LC: | |
5850 | { | |
5851 | int count = 0; | |
5852 | uschar *t = sub - 1; | |
5853 | while (*(++t) != 0) { *t = tolower(*t); count++; } | |
5854 | yield = string_cat(yield, &size, &ptr, sub, count); | |
5855 | continue; | |
5856 | } | |
5857 | ||
5858 | case EOP_UC: | |
5859 | { | |
5860 | int count = 0; | |
5861 | uschar *t = sub - 1; | |
5862 | while (*(++t) != 0) { *t = toupper(*t); count++; } | |
5863 | yield = string_cat(yield, &size, &ptr, sub, count); | |
5864 | continue; | |
5865 | } | |
5866 | ||
5867 | case EOP_MD5: | |
80c974f8 | 5868 | #ifdef SUPPORT_TLS |
6a8a60e0 JH |
5869 | if (vp && *(void **)vp->value) |
5870 | { | |
5871 | uschar * cp = tls_cert_fprt_md5(*(void **)vp->value); | |
e3dd1d67 | 5872 | yield = string_cat(yield, &size, &ptr, cp, Ustrlen(cp)); |
6a8a60e0 JH |
5873 | } |
5874 | else | |
80c974f8 | 5875 | #endif |
6a8a60e0 JH |
5876 | { |
5877 | md5 base; | |
5878 | uschar digest[16]; | |
5879 | int j; | |
5880 | char st[33]; | |
5881 | md5_start(&base); | |
5882 | md5_end(&base, sub, Ustrlen(sub), digest); | |
5883 | for(j = 0; j < 16; j++) sprintf(st+2*j, "%02x", digest[j]); | |
5884 | yield = string_cat(yield, &size, &ptr, US st, (int)strlen(st)); | |
5885 | } | |
059ec3d9 | 5886 | continue; |
059ec3d9 PH |
5887 | |
5888 | case EOP_SHA1: | |
80c974f8 | 5889 | #ifdef SUPPORT_TLS |
6a8a60e0 JH |
5890 | if (vp && *(void **)vp->value) |
5891 | { | |
5892 | uschar * cp = tls_cert_fprt_sha1(*(void **)vp->value); | |
e3dd1d67 | 5893 | yield = string_cat(yield, &size, &ptr, cp, Ustrlen(cp)); |
6a8a60e0 JH |
5894 | } |
5895 | else | |
80c974f8 | 5896 | #endif |
6a8a60e0 JH |
5897 | { |
5898 | sha1 base; | |
5899 | uschar digest[20]; | |
5900 | int j; | |
5901 | char st[41]; | |
5902 | sha1_start(&base); | |
5903 | sha1_end(&base, sub, Ustrlen(sub), digest); | |
5904 | for(j = 0; j < 20; j++) sprintf(st+2*j, "%02X", digest[j]); | |
5905 | yield = string_cat(yield, &size, &ptr, US st, (int)strlen(st)); | |
5906 | } | |
059ec3d9 | 5907 | continue; |
059ec3d9 | 5908 | |
9ef9101c JH |
5909 | case EOP_SHA256: |
5910 | #ifdef SUPPORT_TLS | |
5911 | if (vp && *(void **)vp->value) | |
5912 | { | |
5913 | uschar * cp = tls_cert_fprt_sha256(*(void **)vp->value); | |
ca492d88 | 5914 | yield = string_cat(yield, &size, &ptr, cp, (int)Ustrlen(cp)); |
9ef9101c JH |
5915 | } |
5916 | else | |
5917 | #endif | |
5918 | expand_string_message = US"sha256 only supported for certificates"; | |
5919 | continue; | |
5920 | ||
059ec3d9 PH |
5921 | /* Convert hex encoding to base64 encoding */ |
5922 | ||
5923 | case EOP_HEX2B64: | |
5924 | { | |
5925 | int c = 0; | |
5926 | int b = -1; | |
5927 | uschar *in = sub; | |
5928 | uschar *out = sub; | |
5929 | uschar *enc; | |
5930 | ||
5931 | for (enc = sub; *enc != 0; enc++) | |
5932 | { | |
5933 | if (!isxdigit(*enc)) | |
5934 | { | |
5935 | expand_string_message = string_sprintf("\"%s\" is not a hex " | |
5936 | "string", sub); | |
5937 | goto EXPAND_FAILED; | |
5938 | } | |
5939 | c++; | |
5940 | } | |
5941 | ||
5942 | if ((c & 1) != 0) | |
5943 | { | |
5944 | expand_string_message = string_sprintf("\"%s\" contains an odd " | |
5945 | "number of characters", sub); | |
5946 | goto EXPAND_FAILED; | |
5947 | } | |
5948 | ||
5949 | while ((c = *in++) != 0) | |
5950 | { | |
5951 | if (isdigit(c)) c -= '0'; | |
5952 | else c = toupper(c) - 'A' + 10; | |
5953 | if (b == -1) | |
5954 | { | |
5955 | b = c << 4; | |
5956 | } | |
5957 | else | |
5958 | { | |
5959 | *out++ = b | c; | |
5960 | b = -1; | |
5961 | } | |
5962 | } | |
5963 | ||
5964 | enc = auth_b64encode(sub, out - sub); | |
5965 | yield = string_cat(yield, &size, &ptr, enc, Ustrlen(enc)); | |
5966 | continue; | |
5967 | } | |
5968 | ||
c393f931 TF |
5969 | /* Convert octets outside 0x21..0x7E to \xXX form */ |
5970 | ||
5971 | case EOP_HEXQUOTE: | |
5972 | { | |
5973 | uschar *t = sub - 1; | |
5974 | while (*(++t) != 0) | |
5975 | { | |
5976 | if (*t < 0x21 || 0x7E < *t) | |
5977 | yield = string_cat(yield, &size, &ptr, | |
5978 | string_sprintf("\\x%02x", *t), 4); | |
5979 | else | |
5980 | yield = string_cat(yield, &size, &ptr, t, 1); | |
5981 | } | |
5982 | continue; | |
5983 | } | |
5984 | ||
a64a3dfa JH |
5985 | /* count the number of list elements */ |
5986 | ||
5987 | case EOP_LISTCOUNT: | |
5988 | { | |
5989 | int cnt = 0; | |
5990 | int sep = 0; | |
5991 | uschar * cp; | |
5992 | uschar buffer[256]; | |
5993 | ||
5994 | while (string_nextinlist(&sub, &sep, buffer, sizeof(buffer)) != NULL) cnt++; | |
5995 | cp = string_sprintf("%d", cnt); | |
5996 | yield = string_cat(yield, &size, &ptr, cp, Ustrlen(cp)); | |
5997 | continue; | |
5998 | } | |
5999 | ||
042eb971 | 6000 | /* expand a named list given the name */ |
a64a3dfa | 6001 | /* handles nested named lists; requotes as colon-sep list */ |
042eb971 | 6002 | |
a64a3dfa | 6003 | case EOP_LISTNAMED: |
042eb971 JH |
6004 | { |
6005 | tree_node *t = NULL; | |
6006 | uschar * list; | |
6007 | int sep = 0; | |
6008 | uschar * item; | |
6d9cfc47 | 6009 | uschar * suffix = US""; |
042eb971 JH |
6010 | BOOL needsep = FALSE; |
6011 | uschar buffer[256]; | |
6012 | ||
6013 | if (*sub == '+') sub++; | |
6014 | if (arg == NULL) /* no-argument version */ | |
6015 | { | |
6016 | if (!(t = tree_search(addresslist_anchor, sub)) && | |
6017 | !(t = tree_search(domainlist_anchor, sub)) && | |
6018 | !(t = tree_search(hostlist_anchor, sub))) | |
6019 | t = tree_search(localpartlist_anchor, sub); | |
6020 | } | |
6021 | else switch(*arg) /* specific list-type version */ | |
6022 | { | |
6d9cfc47 JH |
6023 | case 'a': t = tree_search(addresslist_anchor, sub); suffix = US"_a"; break; |
6024 | case 'd': t = tree_search(domainlist_anchor, sub); suffix = US"_d"; break; | |
6025 | case 'h': t = tree_search(hostlist_anchor, sub); suffix = US"_h"; break; | |
6026 | case 'l': t = tree_search(localpartlist_anchor, sub); suffix = US"_l"; break; | |
042eb971 JH |
6027 | default: |
6028 | expand_string_message = string_sprintf("bad suffix on \"list\" operator"); | |
6029 | goto EXPAND_FAILED; | |
6030 | } | |
6031 | ||
6032 | if(!t) | |
6033 | { | |
6034 | expand_string_message = string_sprintf("\"%s\" is not a %snamed list", | |
6035 | sub, !arg?"" | |
6036 | : *arg=='a'?"address " | |
6037 | : *arg=='d'?"domain " | |
6038 | : *arg=='h'?"host " | |
6039 | : *arg=='l'?"localpart " | |
6040 | : 0); | |
6041 | goto EXPAND_FAILED; | |
6042 | } | |
6043 | ||
042eb971 JH |
6044 | list = ((namedlist_block *)(t->data.ptr))->string; |
6045 | ||
6046 | while ((item = string_nextinlist(&list, &sep, buffer, sizeof(buffer))) != NULL) | |
6047 | { | |
6048 | uschar * buf = US" : "; | |
6049 | if (needsep) | |
6050 | yield = string_cat(yield, &size, &ptr, buf, 3); | |
6051 | else | |
6052 | needsep = TRUE; | |
6053 | ||
6054 | if (*item == '+') /* list item is itself a named list */ | |
6055 | { | |
a64a3dfa | 6056 | uschar * sub = string_sprintf("${listnamed%s:%s}", suffix, item); |
b0e85a8f | 6057 | item = expand_string_internal(sub, FALSE, NULL, FALSE, TRUE, &resetok); |
042eb971 JH |
6058 | } |
6059 | else if (sep != ':') /* item from non-colon-sep list, re-quote for colon list-separator */ | |
6060 | { | |
6061 | char * cp; | |
6062 | char tok[3]; | |
6063 | tok[0] = sep; tok[1] = ':'; tok[2] = 0; | |
6064 | while ((cp= strpbrk((const char *)item, tok))) | |
6065 | { | |
6066 | yield = string_cat(yield, &size, &ptr, item, cp-(char *)item); | |
6067 | if (*cp++ == ':') /* colon in a non-colon-sep list item, needs doubling */ | |
6068 | { | |
6069 | yield = string_cat(yield, &size, &ptr, US"::", 2); | |
6d9cfc47 | 6070 | item = (uschar *)cp; |
042eb971 JH |
6071 | } |
6072 | else /* sep in item; should already be doubled; emit once */ | |
6073 | { | |
6074 | yield = string_cat(yield, &size, &ptr, (uschar *)tok, 1); | |
6075 | if (*cp == sep) cp++; | |
6d9cfc47 | 6076 | item = (uschar *)cp; |
042eb971 JH |
6077 | } |
6078 | } | |
6079 | } | |
6080 | yield = string_cat(yield, &size, &ptr, item, Ustrlen(item)); | |
6081 | } | |
6082 | continue; | |
6083 | } | |
6084 | ||
059ec3d9 PH |
6085 | /* mask applies a mask to an IP address; for example the result of |
6086 | ${mask:131.111.10.206/28} is 131.111.10.192/28. */ | |
6087 | ||
6088 | case EOP_MASK: | |
6089 | { | |
6090 | int count; | |
6091 | uschar *endptr; | |
6092 | int binary[4]; | |
6093 | int mask, maskoffset; | |
6094 | int type = string_is_ip_address(sub, &maskoffset); | |
6095 | uschar buffer[64]; | |
6096 | ||
6097 | if (type == 0) | |
6098 | { | |
6099 | expand_string_message = string_sprintf("\"%s\" is not an IP address", | |
6100 | sub); | |
6101 | goto EXPAND_FAILED; | |
6102 | } | |
6103 | ||
6104 | if (maskoffset == 0) | |
6105 | { | |
6106 | expand_string_message = string_sprintf("missing mask value in \"%s\"", | |
6107 | sub); | |
6108 | goto EXPAND_FAILED; | |
6109 | } | |
6110 | ||
6111 | mask = Ustrtol(sub + maskoffset + 1, &endptr, 10); | |
6112 | ||
6113 | if (*endptr != 0 || mask < 0 || mask > ((type == 4)? 32 : 128)) | |
6114 | { | |
6115 | expand_string_message = string_sprintf("mask value too big in \"%s\"", | |
6116 | sub); | |
6117 | goto EXPAND_FAILED; | |
6118 | } | |
6119 | ||
6120 | /* Convert the address to binary integer(s) and apply the mask */ | |
6121 | ||
6122 | sub[maskoffset] = 0; | |
6123 | count = host_aton(sub, binary); | |
6124 | host_mask(count, binary, mask); | |
6125 | ||
6126 | /* Convert to masked textual format and add to output. */ | |
6127 | ||
6128 | yield = string_cat(yield, &size, &ptr, buffer, | |
6f0c9a4f | 6129 | host_nmtoa(count, binary, mask, buffer, '.')); |
059ec3d9 PH |
6130 | continue; |
6131 | } | |
6132 | ||
6133 | case EOP_ADDRESS: | |
6134 | case EOP_LOCAL_PART: | |
6135 | case EOP_DOMAIN: | |
6136 | { | |
6137 | uschar *error; | |
6138 | int start, end, domain; | |
6139 | uschar *t = parse_extract_address(sub, &error, &start, &end, &domain, | |
6140 | FALSE); | |
6141 | if (t != NULL) | |
6142 | { | |
6143 | if (c != EOP_DOMAIN) | |
6144 | { | |
6145 | if (c == EOP_LOCAL_PART && domain != 0) end = start + domain - 1; | |
6146 | yield = string_cat(yield, &size, &ptr, sub+start, end-start); | |
6147 | } | |
6148 | else if (domain != 0) | |
6149 | { | |
6150 | domain += start; | |
6151 | yield = string_cat(yield, &size, &ptr, sub+domain, end-domain); | |
6152 | } | |
6153 | } | |
6154 | continue; | |
6155 | } | |
6156 | ||
29f89cad PH |
6157 | case EOP_ADDRESSES: |
6158 | { | |
6159 | uschar outsep[2] = { ':', '\0' }; | |
6160 | uschar *address, *error; | |
6161 | int save_ptr = ptr; | |
6162 | int start, end, domain; /* Not really used */ | |
6163 | ||
6164 | while (isspace(*sub)) sub++; | |
6165 | if (*sub == '>') { *outsep = *++sub; ++sub; } | |
6166 | parse_allow_group = TRUE; | |
6167 | ||
6168 | for (;;) | |
6169 | { | |
6170 | uschar *p = parse_find_address_end(sub, FALSE); | |
6171 | uschar saveend = *p; | |
6172 | *p = '\0'; | |
6173 | address = parse_extract_address(sub, &error, &start, &end, &domain, | |
6174 | FALSE); | |
6175 | *p = saveend; | |
6176 | ||
6177 | /* Add the address to the output list that we are building. This is | |
6178 | done in chunks by searching for the separator character. At the | |
6179 | start, unless we are dealing with the first address of the output | |
6180 | list, add in a space if the new address begins with the separator | |
6181 | character, or is an empty string. */ | |
6182 | ||
6183 | if (address != NULL) | |
6184 | { | |
6185 | if (ptr != save_ptr && address[0] == *outsep) | |
6186 | yield = string_cat(yield, &size, &ptr, US" ", 1); | |
6187 | ||
6188 | for (;;) | |
6189 | { | |
6190 | size_t seglen = Ustrcspn(address, outsep); | |
6191 | yield = string_cat(yield, &size, &ptr, address, seglen + 1); | |
6192 | ||
6193 | /* If we got to the end of the string we output one character | |
6194 | too many. */ | |
6195 | ||
6196 | if (address[seglen] == '\0') { ptr--; break; } | |
6197 | yield = string_cat(yield, &size, &ptr, outsep, 1); | |
6198 | address += seglen + 1; | |
6199 | } | |
6200 | ||
6201 | /* Output a separator after the string: we will remove the | |
6202 | redundant final one at the end. */ | |
6203 | ||
6204 | yield = string_cat(yield, &size, &ptr, outsep, 1); | |
6205 | } | |
6206 | ||
6207 | if (saveend == '\0') break; | |
6208 | sub = p + 1; | |
6209 | } | |
6210 | ||
6211 | /* If we have generated anything, remove the redundant final | |
6212 | separator. */ | |
6213 | ||
6214 | if (ptr != save_ptr) ptr--; | |
6215 | parse_allow_group = FALSE; | |
6216 | continue; | |
6217 | } | |
6218 | ||
6219 | ||
059ec3d9 PH |
6220 | /* quote puts a string in quotes if it is empty or contains anything |
6221 | other than alphamerics, underscore, dot, or hyphen. | |
6222 | ||
6223 | quote_local_part puts a string in quotes if RFC 2821/2822 requires it to | |
6224 | be quoted in order to be a valid local part. | |
6225 | ||
6226 | In both cases, newlines and carriage returns are converted into \n and \r | |
6227 | respectively */ | |
6228 | ||
6229 | case EOP_QUOTE: | |
6230 | case EOP_QUOTE_LOCAL_PART: | |
6231 | if (arg == NULL) | |
6232 | { | |
6233 | BOOL needs_quote = (*sub == 0); /* TRUE for empty string */ | |
6234 | uschar *t = sub - 1; | |
6235 | ||
6236 | if (c == EOP_QUOTE) | |
6237 | { | |
6238 | while (!needs_quote && *(++t) != 0) | |
6239 | needs_quote = !isalnum(*t) && !strchr("_-.", *t); | |
6240 | } | |
6241 | else /* EOP_QUOTE_LOCAL_PART */ | |
6242 | { | |
6243 | while (!needs_quote && *(++t) != 0) | |
6244 | needs_quote = !isalnum(*t) && | |
6245 | strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL && | |
6246 | (*t != '.' || t == sub || t[1] == 0); | |
6247 | } | |
6248 | ||
6249 | if (needs_quote) | |
6250 | { | |
6251 | yield = string_cat(yield, &size, &ptr, US"\"", 1); | |
6252 | t = sub - 1; | |
6253 | while (*(++t) != 0) | |
6254 | { | |
6255 | if (*t == '\n') | |
6256 | yield = string_cat(yield, &size, &ptr, US"\\n", 2); | |
6257 | else if (*t == '\r') | |
6258 | yield = string_cat(yield, &size, &ptr, US"\\r", 2); | |
6259 | else | |
6260 | { | |
6261 | if (*t == '\\' || *t == '"') | |
6262 | yield = string_cat(yield, &size, &ptr, US"\\", 1); | |
6263 | yield = string_cat(yield, &size, &ptr, t, 1); | |
6264 | } | |
6265 | } | |
6266 | yield = string_cat(yield, &size, &ptr, US"\"", 1); | |
6267 | } | |
6268 | else yield = string_cat(yield, &size, &ptr, sub, Ustrlen(sub)); | |
6269 | continue; | |
6270 | } | |
6271 | ||
6272 | /* quote_lookuptype does lookup-specific quoting */ | |
6273 | ||
6274 | else | |
6275 | { | |
6276 | int n; | |
6277 | uschar *opt = Ustrchr(arg, '_'); | |
6278 | ||
6279 | if (opt != NULL) *opt++ = 0; | |
6280 | ||
6281 | n = search_findtype(arg, Ustrlen(arg)); | |
6282 | if (n < 0) | |
6283 | { | |
6284 | expand_string_message = search_error_message; | |
6285 | goto EXPAND_FAILED; | |
6286 | } | |
6287 | ||
e6d225ae DW |
6288 | if (lookup_list[n]->quote != NULL) |
6289 | sub = (lookup_list[n]->quote)(sub, opt); | |
059ec3d9 PH |
6290 | else if (opt != NULL) sub = NULL; |
6291 | ||
6292 | if (sub == NULL) | |
6293 | { | |
6294 | expand_string_message = string_sprintf( | |
6295 | "\"%s\" unrecognized after \"${quote_%s\"", | |
6296 | opt, arg); | |
6297 | goto EXPAND_FAILED; | |
6298 | } | |
6299 | ||
6300 | yield = string_cat(yield, &size, &ptr, sub, Ustrlen(sub)); | |
6301 | continue; | |
6302 | } | |
6303 | ||
6304 | /* rx quote sticks in \ before any non-alphameric character so that | |
6305 | the insertion works in a regular expression. */ | |
6306 | ||
6307 | case EOP_RXQUOTE: | |
6308 | { | |
6309 | uschar *t = sub - 1; | |
6310 | while (*(++t) != 0) | |
6311 | { | |
6312 | if (!isalnum(*t)) | |
6313 | yield = string_cat(yield, &size, &ptr, US"\\", 1); | |
6314 | yield = string_cat(yield, &size, &ptr, t, 1); | |
6315 | } | |
6316 | continue; | |
6317 | } | |
6318 | ||
6319 | /* RFC 2047 encodes, assuming headers_charset (default ISO 8859-1) as | |
6320 | prescribed by the RFC, if there are characters that need to be encoded */ | |
6321 | ||
6322 | case EOP_RFC2047: | |
6323 | { | |
14702f5b | 6324 | uschar buffer[2048]; |
059ec3d9 | 6325 | uschar *string = parse_quote_2047(sub, Ustrlen(sub), headers_charset, |
46218253 | 6326 | buffer, sizeof(buffer), FALSE); |
059ec3d9 PH |
6327 | yield = string_cat(yield, &size, &ptr, string, Ustrlen(string)); |
6328 | continue; | |
6329 | } | |
6330 | ||
9c57cbc0 PH |
6331 | /* RFC 2047 decode */ |
6332 | ||
6333 | case EOP_RFC2047D: | |
6334 | { | |
6335 | int len; | |
6336 | uschar *error; | |
6337 | uschar *decoded = rfc2047_decode(sub, check_rfc2047_length, | |
6338 | headers_charset, '?', &len, &error); | |
6339 | if (error != NULL) | |
6340 | { | |
6341 | expand_string_message = error; | |
6342 | goto EXPAND_FAILED; | |
6343 | } | |
6344 | yield = string_cat(yield, &size, &ptr, decoded, len); | |
6345 | continue; | |
6346 | } | |
6347 | ||
059ec3d9 PH |
6348 | /* from_utf8 converts UTF-8 to 8859-1, turning non-existent chars into |
6349 | underscores */ | |
6350 | ||
6351 | case EOP_FROM_UTF8: | |
6352 | { | |
6353 | while (*sub != 0) | |
6354 | { | |
6355 | int c; | |
6356 | uschar buff[4]; | |
6357 | GETUTF8INC(c, sub); | |
6358 | if (c > 255) c = '_'; | |
6359 | buff[0] = c; | |
6360 | yield = string_cat(yield, &size, &ptr, buff, 1); | |
6361 | } | |
6362 | continue; | |
6363 | } | |
6364 | ||
b9c2e32f AR |
6365 | /* replace illegal UTF-8 sequences by replacement character */ |
6366 | ||
6367 | #define UTF8_REPLACEMENT_CHAR US"?" | |
6368 | ||
6369 | case EOP_UTF8CLEAN: | |
6370 | { | |
6371 | int seq_len, index = 0; | |
e3dd1d67 | 6372 | int bytes_left = 0; |
b9c2e32f AR |
6373 | uschar seq_buff[4]; /* accumulate utf-8 here */ |
6374 | ||
6375 | while (*sub != 0) | |
6376 | { | |
6377 | int complete; | |
6378 | long codepoint; | |
6379 | uschar c; | |
6380 | ||
6381 | complete = 0; | |
6382 | c = *sub++; | |
e3dd1d67 | 6383 | if (bytes_left) |
b9c2e32f AR |
6384 | { |
6385 | if ((c & 0xc0) != 0x80) | |
6386 | { | |
6387 | /* wrong continuation byte; invalidate all bytes */ | |
6388 | complete = 1; /* error */ | |
6389 | } | |
6390 | else | |
6391 | { | |
6392 | codepoint = (codepoint << 6) | (c & 0x3f); | |
6393 | seq_buff[index++] = c; | |
6394 | if (--bytes_left == 0) /* codepoint complete */ | |
6395 | { | |
6396 | if(codepoint > 0x10FFFF) /* is it too large? */ | |
6397 | complete = -1; /* error */ | |
6398 | else | |
6399 | { /* finished; output utf-8 sequence */ | |
6400 | yield = string_cat(yield, &size, &ptr, seq_buff, seq_len); | |
6401 | index = 0; | |
6402 | } | |
6403 | } | |
6404 | } | |
6405 | } | |
6406 | else /* no bytes left: new sequence */ | |
6407 | { | |
6408 | if((c & 0x80) == 0) /* 1-byte sequence, US-ASCII, keep it */ | |
6409 | { | |
6410 | yield = string_cat(yield, &size, &ptr, &c, 1); | |
6411 | continue; | |
6412 | } | |
6413 | if((c & 0xe0) == 0xc0) /* 2-byte sequence */ | |
6414 | { | |
10cc8a1e AR |
6415 | if(c == 0xc0 || c == 0xc1) /* 0xc0 and 0xc1 are illegal */ |
6416 | complete = -1; | |
6417 | else | |
6418 | { | |
6419 | bytes_left = 1; | |
6420 | codepoint = c & 0x1f; | |
6421 | } | |
b9c2e32f AR |
6422 | } |
6423 | else if((c & 0xf0) == 0xe0) /* 3-byte sequence */ | |
6424 | { | |
6425 | bytes_left = 2; | |
6426 | codepoint = c & 0x0f; | |
6427 | } | |
6428 | else if((c & 0xf8) == 0xf0) /* 4-byte sequence */ | |
6429 | { | |
6430 | bytes_left = 3; | |
6431 | codepoint = c & 0x07; | |
6432 | } | |
6433 | else /* invalid or too long (RFC3629 allows only 4 bytes) */ | |
6434 | complete = -1; | |
6435 | ||
6436 | seq_buff[index++] = c; | |
6437 | seq_len = bytes_left + 1; | |
6438 | } /* if(bytes_left) */ | |
6439 | ||
6440 | if (complete != 0) | |
6441 | { | |
6442 | bytes_left = index = 0; | |
6443 | yield = string_cat(yield, &size, &ptr, UTF8_REPLACEMENT_CHAR, 1); | |
6444 | } | |
6445 | if ((complete == 1) && ((c & 0x80) == 0)) | |
6446 | { /* ASCII character follows incomplete sequence */ | |
6447 | yield = string_cat(yield, &size, &ptr, &c, 1); | |
6448 | } | |
6449 | } | |
6450 | continue; | |
6451 | } | |
6452 | ||
059ec3d9 PH |
6453 | /* escape turns all non-printing characters into escape sequences. */ |
6454 | ||
6455 | case EOP_ESCAPE: | |
6456 | { | |
6457 | uschar *t = string_printing(sub); | |
6458 | yield = string_cat(yield, &size, &ptr, t, Ustrlen(t)); | |
6459 | continue; | |
6460 | } | |
6461 | ||
6462 | /* Handle numeric expression evaluation */ | |
6463 | ||
6464 | case EOP_EVAL: | |
6465 | case EOP_EVAL10: | |
6466 | { | |
6467 | uschar *save_sub = sub; | |
6468 | uschar *error = NULL; | |
97d17305 | 6469 | int_eximarith_t n = eval_expr(&sub, (c == EOP_EVAL10), &error, FALSE); |
059ec3d9 PH |
6470 | if (error != NULL) |
6471 | { | |
6472 | expand_string_message = string_sprintf("error in expression " | |
6473 | "evaluation: %s (after processing \"%.*s\")", error, sub-save_sub, | |
6474 | save_sub); | |
6475 | goto EXPAND_FAILED; | |
6476 | } | |
97d17305 | 6477 | sprintf(CS var_buffer, PR_EXIM_ARITH, n); |
059ec3d9 PH |
6478 | yield = string_cat(yield, &size, &ptr, var_buffer, Ustrlen(var_buffer)); |
6479 | continue; | |
6480 | } | |
6481 | ||
6482 | /* Handle time period formating */ | |
6483 | ||
f90d018c PH |
6484 | case EOP_TIME_EVAL: |
6485 | { | |
6486 | int n = readconf_readtime(sub, 0, FALSE); | |
6487 | if (n < 0) | |
6488 | { | |
6489 | expand_string_message = string_sprintf("string \"%s\" is not an " | |
6490 | "Exim time interval in \"%s\" operator", sub, name); | |
6491 | goto EXPAND_FAILED; | |
6492 | } | |
6493 | sprintf(CS var_buffer, "%d", n); | |
6494 | yield = string_cat(yield, &size, &ptr, var_buffer, Ustrlen(var_buffer)); | |
6495 | continue; | |
6496 | } | |
6497 | ||
059ec3d9 PH |
6498 | case EOP_TIME_INTERVAL: |
6499 | { | |
6500 | int n; | |
6501 | uschar *t = read_number(&n, sub); | |
6502 | if (*t != 0) /* Not A Number*/ | |
6503 | { | |
6504 | expand_string_message = string_sprintf("string \"%s\" is not a " | |
6505 | "positive number in \"%s\" operator", sub, name); | |
6506 | goto EXPAND_FAILED; | |
6507 | } | |
6508 | t = readconf_printtime(n); | |
6509 | yield = string_cat(yield, &size, &ptr, t, Ustrlen(t)); | |
6510 | continue; | |
6511 | } | |
6512 | ||
6513 | /* Convert string to base64 encoding */ | |
6514 | ||
6515 | case EOP_STR2B64: | |
6516 | { | |
6517 | uschar *encstr = auth_b64encode(sub, Ustrlen(sub)); | |
6518 | yield = string_cat(yield, &size, &ptr, encstr, Ustrlen(encstr)); | |
6519 | continue; | |
6520 | } | |
6521 | ||
6522 | /* strlen returns the length of the string */ | |
6523 | ||
6524 | case EOP_STRLEN: | |
6525 | { | |
6526 | uschar buff[24]; | |
6527 | (void)sprintf(CS buff, "%d", Ustrlen(sub)); | |
6528 | yield = string_cat(yield, &size, &ptr, buff, Ustrlen(buff)); | |
6529 | continue; | |
6530 | } | |
6531 | ||
6532 | /* length_n or l_n takes just the first n characters or the whole string, | |
6533 | whichever is the shorter; | |
6534 | ||
6535 | substr_m_n, and s_m_n take n characters from offset m; negative m take | |
6536 | from the end; l_n is synonymous with s_0_n. If n is omitted in substr it | |
6537 | takes the rest, either to the right or to the left. | |
6538 | ||
6539 | hash_n or h_n makes a hash of length n from the string, yielding n | |
6540 | characters from the set a-z; hash_n_m makes a hash of length n, but | |
6541 | uses m characters from the set a-zA-Z0-9. | |
6542 | ||
6543 | nhash_n returns a single number between 0 and n-1 (in text form), while | |
6544 | nhash_n_m returns a div/mod hash as two numbers "a/b". The first lies | |
6545 | between 0 and n-1 and the second between 0 and m-1. */ | |
6546 | ||
6547 | case EOP_LENGTH: | |
6548 | case EOP_L: | |
6549 | case EOP_SUBSTR: | |
6550 | case EOP_S: | |
6551 | case EOP_HASH: | |
6552 | case EOP_H: | |
6553 | case EOP_NHASH: | |
6554 | case EOP_NH: | |
6555 | { | |
6556 | int sign = 1; | |
6557 | int value1 = 0; | |
6558 | int value2 = -1; | |
6559 | int *pn; | |
6560 | int len; | |
6561 | uschar *ret; | |
6562 | ||
6563 | if (arg == NULL) | |
6564 | { | |
6565 | expand_string_message = string_sprintf("missing values after %s", | |
6566 | name); | |
6567 | goto EXPAND_FAILED; | |
6568 | } | |
6569 | ||
6570 | /* "length" has only one argument, effectively being synonymous with | |
6571 | substr_0_n. */ | |
6572 | ||
6573 | if (c == EOP_LENGTH || c == EOP_L) | |
6574 | { | |
6575 | pn = &value2; | |
6576 | value2 = 0; | |
6577 | } | |
6578 | ||
6579 | /* The others have one or two arguments; for "substr" the first may be | |
6580 | negative. The second being negative means "not supplied". */ | |
6581 | ||
6582 | else | |
6583 | { | |
6584 | pn = &value1; | |
6585 | if (name[0] == 's' && *arg == '-') { sign = -1; arg++; } | |
6586 | } | |
6587 | ||
6588 | /* Read up to two numbers, separated by underscores */ | |
6589 | ||
6590 | ret = arg; | |
6591 | while (*arg != 0) | |
6592 | { | |
6593 | if (arg != ret && *arg == '_' && pn == &value1) | |
6594 | { | |
6595 | pn = &value2; | |
6596 | value2 = 0; | |
6597 | if (arg[1] != 0) arg++; | |
6598 | } | |
6599 | else if (!isdigit(*arg)) | |
6600 | { | |
6601 | expand_string_message = | |
6602 | string_sprintf("non-digit after underscore in \"%s\"", name); | |
6603 | goto EXPAND_FAILED; | |
6604 | } | |
6605 | else *pn = (*pn)*10 + *arg++ - '0'; | |
6606 | } | |
6607 | value1 *= sign; | |
6608 | ||
6609 | /* Perform the required operation */ | |
6610 | ||
6611 | ret = | |
6612 | (c == EOP_HASH || c == EOP_H)? | |
6613 | compute_hash(sub, value1, value2, &len) : | |
6614 | (c == EOP_NHASH || c == EOP_NH)? | |
6615 | compute_nhash(sub, value1, value2, &len) : | |
6616 | extract_substr(sub, value1, value2, &len); | |
6617 | ||
6618 | if (ret == NULL) goto EXPAND_FAILED; | |
6619 | yield = string_cat(yield, &size, &ptr, ret, len); | |
6620 | continue; | |
6621 | } | |
6622 | ||
6623 | /* Stat a path */ | |
6624 | ||
6625 | case EOP_STAT: | |
6626 | { | |
6627 | uschar *s; | |
6628 | uschar smode[12]; | |
6629 | uschar **modetable[3]; | |
6630 | int i; | |
6631 | mode_t mode; | |
6632 | struct stat st; | |
6633 | ||
254e032f PH |
6634 | if ((expand_forbid & RDO_EXISTS) != 0) |
6635 | { | |
6636 | expand_string_message = US"Use of the stat() expansion is not permitted"; | |
6637 | goto EXPAND_FAILED; | |
6638 | } | |
6639 | ||
059ec3d9 PH |
6640 | if (stat(CS sub, &st) < 0) |
6641 | { | |
6642 | expand_string_message = string_sprintf("stat(%s) failed: %s", | |
6643 | sub, strerror(errno)); | |
6644 | goto EXPAND_FAILED; | |
6645 | } | |
6646 | mode = st.st_mode; | |
6647 | switch (mode & S_IFMT) | |
6648 | { | |
6649 | case S_IFIFO: smode[0] = 'p'; break; | |
6650 | case S_IFCHR: smode[0] = 'c'; break; | |
6651 | case S_IFDIR: smode[0] = 'd'; break; | |
6652 | case S_IFBLK: smode[0] = 'b'; break; | |
6653 | case S_IFREG: smode[0] = '-'; break; | |
6654 | default: smode[0] = '?'; break; | |
6655 | } | |
6656 | ||
6657 | modetable[0] = ((mode & 01000) == 0)? mtable_normal : mtable_sticky; | |
6658 | modetable[1] = ((mode & 02000) == 0)? mtable_normal : mtable_setid; | |
6659 | modetable[2] = ((mode & 04000) == 0)? mtable_normal : mtable_setid; | |
6660 | ||
6661 | for (i = 0; i < 3; i++) | |
6662 | { | |
6663 | memcpy(CS(smode + 7 - i*3), CS(modetable[i][mode & 7]), 3); | |
6664 | mode >>= 3; | |
6665 | } | |
6666 | ||
6667 | smode[10] = 0; | |
6668 | s = string_sprintf("mode=%04lo smode=%s inode=%ld device=%ld links=%ld " | |
b1c749bb | 6669 | "uid=%ld gid=%ld size=" OFF_T_FMT " atime=%ld mtime=%ld ctime=%ld", |
059ec3d9 PH |
6670 | (long)(st.st_mode & 077777), smode, (long)st.st_ino, |
6671 | (long)st.st_dev, (long)st.st_nlink, (long)st.st_uid, | |
b1c749bb | 6672 | (long)st.st_gid, st.st_size, (long)st.st_atime, |
059ec3d9 PH |
6673 | (long)st.st_mtime, (long)st.st_ctime); |
6674 | yield = string_cat(yield, &size, &ptr, s, Ustrlen(s)); | |
6675 | continue; | |
6676 | } | |
6677 | ||
17c76198 | 6678 | /* vaguely random number less than N */ |
9e3331ea TK |
6679 | |
6680 | case EOP_RANDINT: | |
6681 | { | |
97d17305 | 6682 | int_eximarith_t max; |
9e3331ea TK |
6683 | uschar *s; |
6684 | ||
7685ce68 | 6685 | max = expanded_string_integer(sub, TRUE); |
9e3331ea TK |
6686 | if (expand_string_message != NULL) |
6687 | goto EXPAND_FAILED; | |
17c76198 | 6688 | s = string_sprintf("%d", vaguely_random_number((int)max)); |
9e3331ea TK |
6689 | yield = string_cat(yield, &size, &ptr, s, Ustrlen(s)); |
6690 | continue; | |
6691 | } | |
6692 | ||
83e029d5 PP |
6693 | /* Reverse IP, including IPv6 to dotted-nibble */ |
6694 | ||
6695 | case EOP_REVERSE_IP: | |
6696 | { | |
6697 | int family, maskptr; | |
6698 | uschar reversed[128]; | |
6699 | ||
6700 | family = string_is_ip_address(sub, &maskptr); | |
6701 | if (family == 0) | |
6702 | { | |
6703 | expand_string_message = string_sprintf( | |
6704 | "reverse_ip() not given an IP address [%s]", sub); | |
6705 | goto EXPAND_FAILED; | |
6706 | } | |
6707 | invert_address(reversed, sub); | |
6708 | yield = string_cat(yield, &size, &ptr, reversed, Ustrlen(reversed)); | |
6709 | continue; | |
6710 | } | |
6711 | ||
059ec3d9 PH |
6712 | /* Unknown operator */ |
6713 | ||
6714 | default: | |
6715 | expand_string_message = | |
6716 | string_sprintf("unknown expansion operator \"%s\"", name); | |
6717 | goto EXPAND_FAILED; | |
6718 | } | |
6719 | } | |
6720 | ||
6721 | /* Handle a plain name. If this is the first thing in the expansion, release | |
6722 | the pre-allocated buffer. If the result data is known to be in a new buffer, | |
6723 | newsize will be set to the size of that buffer, and we can just point at that | |
6724 | store instead of copying. Many expansion strings contain just one reference, | |
6725 | so this is a useful optimization, especially for humungous headers | |
6726 | ($message_headers). */ | |
2e23003a | 6727 | /*{*/ |
059ec3d9 PH |
6728 | if (*s++ == '}') |
6729 | { | |
6730 | int len; | |
6731 | int newsize = 0; | |
6732 | if (ptr == 0) | |
6733 | { | |
d6b4d938 | 6734 | if (resetok) store_reset(yield); |
059ec3d9 PH |
6735 | yield = NULL; |
6736 | size = 0; | |
6737 | } | |
6738 | value = find_variable(name, FALSE, skipping, &newsize); | |
6739 | if (value == NULL) | |
6740 | { | |
6741 | expand_string_message = | |
6742 | string_sprintf("unknown variable in \"${%s}\"", name); | |
641cb756 | 6743 | check_variable_error_message(name); |
059ec3d9 PH |
6744 | goto EXPAND_FAILED; |
6745 | } | |
6746 | len = Ustrlen(value); | |
6747 | if (yield == NULL && newsize != 0) | |
6748 | { | |
6749 | yield = value; | |
6750 | size = newsize; | |
6751 | ptr = len; | |
6752 | } | |
6753 | else yield = string_cat(yield, &size, &ptr, value, len); | |
6754 | continue; | |
6755 | } | |
6756 | ||
6757 | /* Else there's something wrong */ | |
6758 | ||
6759 | expand_string_message = | |
6760 | string_sprintf("\"${%s\" is not a known operator (or a } is missing " | |
6761 | "in a variable reference)", name); | |
6762 | goto EXPAND_FAILED; | |
6763 | } | |
6764 | ||
6765 | /* If we hit the end of the string when ket_ends is set, there is a missing | |
6766 | terminating brace. */ | |
6767 | ||
6768 | if (ket_ends && *s == 0) | |
6769 | { | |
6770 | expand_string_message = malformed_header? | |
6771 | US"missing } at end of string - could be header name not terminated by colon" | |
6772 | : | |
6773 | US"missing } at end of string"; | |
6774 | goto EXPAND_FAILED; | |
6775 | } | |
6776 | ||
6777 | /* Expansion succeeded; yield may still be NULL here if nothing was actually | |
6778 | added to the string. If so, set up an empty string. Add a terminating zero. If | |
6779 | left != NULL, return a pointer to the terminator. */ | |
6780 | ||
6781 | if (yield == NULL) yield = store_get(1); | |
6782 | yield[ptr] = 0; | |
6783 | if (left != NULL) *left = s; | |
6784 | ||
6785 | /* Any stacking store that was used above the final string is no longer needed. | |
6786 | In many cases the final string will be the first one that was got and so there | |
6787 | will be optimal store usage. */ | |
6788 | ||
d6b4d938 | 6789 | if (resetok) store_reset(yield + ptr + 1); |
b0e85a8f JH |
6790 | else if (resetok_p) *resetok_p = FALSE; |
6791 | ||
059ec3d9 PH |
6792 | DEBUG(D_expand) |
6793 | { | |
6794 | debug_printf("expanding: %.*s\n result: %s\n", (int)(s - string), string, | |
6795 | yield); | |
6796 | if (skipping) debug_printf("skipping: result is not used\n"); | |
6797 | } | |
6798 | return yield; | |
6799 | ||
6800 | /* This is the failure exit: easiest to program with a goto. We still need | |
6801 | to update the pointer to the terminator, for cases of nested calls with "fail". | |
6802 | */ | |
6803 | ||
6804 | EXPAND_FAILED_CURLY: | |
6805 | expand_string_message = malformed_header? | |
6806 | US"missing or misplaced { or } - could be header name not terminated by colon" | |
6807 | : | |
6808 | US"missing or misplaced { or }"; | |
6809 | ||
6810 | /* At one point, Exim reset the store to yield (if yield was not NULL), but | |
6811 | that is a bad idea, because expand_string_message is in dynamic store. */ | |
6812 | ||
6813 | EXPAND_FAILED: | |
6814 | if (left != NULL) *left = s; | |
6815 | DEBUG(D_expand) | |
6816 | { | |
6817 | debug_printf("failed to expand: %s\n", string); | |
6818 | debug_printf(" error message: %s\n", expand_string_message); | |
6819 | if (expand_string_forcedfail) debug_printf("failure was forced\n"); | |
6820 | } | |
b0e85a8f | 6821 | if (resetok_p) *resetok_p = resetok; |
059ec3d9 PH |
6822 | return NULL; |
6823 | } | |
6824 | ||
6825 | ||
6826 | /* This is the external function call. Do a quick check for any expansion | |
6827 | metacharacters, and if there are none, just return the input string. | |
6828 | ||
6829 | Argument: the string to be expanded | |
6830 | Returns: the expanded string, or NULL if expansion failed; if failure was | |
6831 | due to a lookup deferring, search_find_defer will be TRUE | |
6832 | */ | |
6833 | ||
6834 | uschar * | |
6835 | expand_string(uschar *string) | |
6836 | { | |
6837 | search_find_defer = FALSE; | |
6838 | malformed_header = FALSE; | |
6839 | return (Ustrpbrk(string, "$\\") == NULL)? string : | |
b0e85a8f | 6840 | expand_string_internal(string, FALSE, NULL, FALSE, TRUE, NULL); |
059ec3d9 PH |
6841 | } |
6842 | ||
6843 | ||
6844 | ||
6845 | /************************************************* | |
6846 | * Expand and copy * | |
6847 | *************************************************/ | |
6848 | ||
6849 | /* Now and again we want to expand a string and be sure that the result is in a | |
6850 | new bit of store. This function does that. | |
6851 | ||
6852 | Argument: the string to be expanded | |
6853 | Returns: the expanded string, always in a new bit of store, or NULL | |
6854 | */ | |
6855 | ||
6856 | uschar * | |
6857 | expand_string_copy(uschar *string) | |
6858 | { | |
6859 | uschar *yield = expand_string(string); | |
6860 | if (yield == string) yield = string_copy(string); | |
6861 | return yield; | |
6862 | } | |
6863 | ||
6864 | ||
6865 | ||
6866 | /************************************************* | |
6867 | * Expand and interpret as an integer * | |
6868 | *************************************************/ | |
6869 | ||
6870 | /* Expand a string, and convert the result into an integer. | |
6871 | ||
d45b1de8 PH |
6872 | Arguments: |
6873 | string the string to be expanded | |
6874 | isplus TRUE if a non-negative number is expected | |
059ec3d9 PH |
6875 | |
6876 | Returns: the integer value, or | |
6877 | -1 for an expansion error ) in both cases, message in | |
6878 | -2 for an integer interpretation error ) expand_string_message | |
d45b1de8 | 6879 | expand_string_message is set NULL for an OK integer |
059ec3d9 PH |
6880 | */ |
6881 | ||
97d17305 | 6882 | int_eximarith_t |
d45b1de8 | 6883 | expand_string_integer(uschar *string, BOOL isplus) |
059ec3d9 | 6884 | { |
7685ce68 TF |
6885 | return expanded_string_integer(expand_string(string), isplus); |
6886 | } | |
6887 | ||
6888 | ||
6889 | /************************************************* | |
6890 | * Interpret string as an integer * | |
6891 | *************************************************/ | |
6892 | ||
6893 | /* Convert a string (that has already been expanded) into an integer. | |
6894 | ||
6895 | This function is used inside the expansion code. | |
6896 | ||
6897 | Arguments: | |
6898 | s the string to be expanded | |
6899 | isplus TRUE if a non-negative number is expected | |
6900 | ||
6901 | Returns: the integer value, or | |
6902 | -1 if string is NULL (which implies an expansion error) | |
6903 | -2 for an integer interpretation error | |
6904 | expand_string_message is set NULL for an OK integer | |
6905 | */ | |
6906 | ||
6907 | static int_eximarith_t | |
6908 | expanded_string_integer(uschar *s, BOOL isplus) | |
6909 | { | |
97d17305 | 6910 | int_eximarith_t value; |
059ec3d9 PH |
6911 | uschar *msg = US"invalid integer \"%s\""; |
6912 | uschar *endptr; | |
6913 | ||
d45b1de8 PH |
6914 | /* If expansion failed, expand_string_message will be set. */ |
6915 | ||
059ec3d9 PH |
6916 | if (s == NULL) return -1; |
6917 | ||
6918 | /* On an overflow, strtol() returns LONG_MAX or LONG_MIN, and sets errno | |
6919 | to ERANGE. When there isn't an overflow, errno is not changed, at least on some | |
6920 | systems, so we set it zero ourselves. */ | |
6921 | ||
6922 | errno = 0; | |
d45b1de8 | 6923 | expand_string_message = NULL; /* Indicates no error */ |
b52bc06e NM |
6924 | |
6925 | /* Before Exim 4.64, strings consisting entirely of whitespace compared | |
6926 | equal to 0. Unfortunately, people actually relied upon that, so preserve | |
6927 | the behaviour explicitly. Stripping leading whitespace is a harmless | |
6928 | noop change since strtol skips it anyway (provided that there is a number | |
6929 | to find at all). */ | |
6930 | if (isspace(*s)) | |
6931 | { | |
6932 | while (isspace(*s)) ++s; | |
6933 | if (*s == '\0') | |
6934 | { | |
6935 | DEBUG(D_expand) | |
6936 | debug_printf("treating blank string as number 0\n"); | |
6937 | return 0; | |
6938 | } | |
6939 | } | |
6940 | ||
aa7c82b2 | 6941 | value = strtoll(CS s, CSS &endptr, 10); |
059ec3d9 PH |
6942 | |
6943 | if (endptr == s) | |
6944 | { | |
6945 | msg = US"integer expected but \"%s\" found"; | |
6946 | } | |
d45b1de8 PH |
6947 | else if (value < 0 && isplus) |
6948 | { | |
6949 | msg = US"non-negative integer expected but \"%s\" found"; | |
6950 | } | |
059ec3d9 PH |
6951 | else |
6952 | { | |
4eb9d6ef | 6953 | switch (tolower(*endptr)) |
059ec3d9 | 6954 | { |
4eb9d6ef JH |
6955 | default: |
6956 | break; | |
6957 | case 'k': | |
4328fd3c | 6958 | if (value > EXIM_ARITH_MAX/1024 || value < EXIM_ARITH_MIN/1024) errno = ERANGE; |
aa7c82b2 | 6959 | else value *= 1024; |
4eb9d6ef JH |
6960 | endptr++; |
6961 | break; | |
6962 | case 'm': | |
4328fd3c | 6963 | if (value > EXIM_ARITH_MAX/(1024*1024) || value < EXIM_ARITH_MIN/(1024*1024)) errno = ERANGE; |
4eb9d6ef JH |
6964 | else value *= 1024*1024; |
6965 | endptr++; | |
6966 | break; | |
6967 | case 'g': | |
4328fd3c | 6968 | if (value > EXIM_ARITH_MAX/(1024*1024*1024) || value < EXIM_ARITH_MIN/(1024*1024*1024)) errno = ERANGE; |
4eb9d6ef JH |
6969 | else value *= 1024*1024*1024; |
6970 | endptr++; | |
6971 | break; | |
059ec3d9 PH |
6972 | } |
6973 | if (errno == ERANGE) | |
6974 | msg = US"absolute value of integer \"%s\" is too large (overflow)"; | |
6975 | else | |
6976 | { | |
6977 | while (isspace(*endptr)) endptr++; | |
725735cd | 6978 | if (*endptr == 0) return value; |
059ec3d9 PH |
6979 | } |
6980 | } | |
6981 | ||
6982 | expand_string_message = string_sprintf(CS msg, s); | |
6983 | return -2; | |
6984 | } | |
6985 | ||
059ec3d9 PH |
6986 | |
6987 | /************************************************* | |
6988 | ************************************************** | |
6989 | * Stand-alone test program * | |
6990 | ************************************************** | |
6991 | *************************************************/ | |
6992 | ||
6993 | #ifdef STAND_ALONE | |
6994 | ||
6995 | ||
6996 | BOOL | |
6997 | regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup) | |
6998 | { | |
6999 | int ovector[3*(EXPAND_MAXN+1)]; | |
7000 | int n = pcre_exec(re, NULL, subject, Ustrlen(subject), 0, PCRE_EOPT|options, | |
7001 | ovector, sizeof(ovector)/sizeof(int)); | |
7002 | BOOL yield = n >= 0; | |
7003 | if (n == 0) n = EXPAND_MAXN + 1; | |
7004 | if (yield) | |
7005 | { | |
7006 | int nn; | |
7007 | expand_nmax = (setup < 0)? 0 : setup + 1; | |
7008 | for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2) | |
7009 | { | |
7010 | expand_nstring[expand_nmax] = subject + ovector[nn]; | |
7011 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; | |
7012 | } | |
7013 | expand_nmax--; | |
7014 | } | |
7015 | return yield; | |
7016 | } | |
7017 | ||
7018 | ||
7019 | int main(int argc, uschar **argv) | |
7020 | { | |
7021 | int i; | |
7022 | uschar buffer[1024]; | |
7023 | ||
7024 | debug_selector = D_v; | |
7025 | debug_file = stderr; | |
7026 | debug_fd = fileno(debug_file); | |
7027 | big_buffer = malloc(big_buffer_size); | |
7028 | ||
7029 | for (i = 1; i < argc; i++) | |
7030 | { | |
7031 | if (argv[i][0] == '+') | |
7032 | { | |
7033 | debug_trace_memory = 2; | |
7034 | argv[i]++; | |
7035 | } | |
7036 | if (isdigit(argv[i][0])) | |
7037 | debug_selector = Ustrtol(argv[i], NULL, 0); | |
7038 | else | |
7039 | if (Ustrspn(argv[i], "abcdefghijklmnopqrtsuvwxyz0123456789-.:/") == | |
7040 | Ustrlen(argv[i])) | |
7041 | { | |
7042 | #ifdef LOOKUP_LDAP | |
7043 | eldap_default_servers = argv[i]; | |
7044 | #endif | |
7045 | #ifdef LOOKUP_MYSQL | |
7046 | mysql_servers = argv[i]; | |
7047 | #endif | |
7048 | #ifdef LOOKUP_PGSQL | |
7049 | pgsql_servers = argv[i]; | |
7050 | #endif | |
9bdd29ad TL |
7051 | #ifdef EXPERIMENTAL_REDIS |
7052 | redis_servers = argv[i]; | |
7053 | #endif | |
059ec3d9 PH |
7054 | } |
7055 | #ifdef EXIM_PERL | |
7056 | else opt_perl_startup = argv[i]; | |
7057 | #endif | |
7058 | } | |
7059 | ||
7060 | printf("Testing string expansion: debug_level = %d\n\n", debug_level); | |
7061 | ||
7062 | expand_nstring[1] = US"string 1...."; | |
7063 | expand_nlength[1] = 8; | |
7064 | expand_nmax = 1; | |
7065 | ||
7066 | #ifdef EXIM_PERL | |
7067 | if (opt_perl_startup != NULL) | |
7068 | { | |
7069 | uschar *errstr; | |
7070 | printf("Starting Perl interpreter\n"); | |
7071 | errstr = init_perl(opt_perl_startup); | |
7072 | if (errstr != NULL) | |
7073 | { | |
7074 | printf("** error in perl_startup code: %s\n", errstr); | |
7075 | return EXIT_FAILURE; | |
7076 | } | |
7077 | } | |
7078 | #endif /* EXIM_PERL */ | |
7079 | ||
7080 | while (fgets(buffer, sizeof(buffer), stdin) != NULL) | |
7081 | { | |
7082 | void *reset_point = store_get(0); | |
7083 | uschar *yield = expand_string(buffer); | |
7084 | if (yield != NULL) | |
7085 | { | |
7086 | printf("%s\n", yield); | |
7087 | store_reset(reset_point); | |
7088 | } | |
7089 | else | |
7090 | { | |
7091 | if (search_find_defer) printf("search_find deferred\n"); | |
7092 | printf("Failed: %s\n", expand_string_message); | |
7093 | if (expand_string_forcedfail) printf("Forced failure\n"); | |
7094 | printf("\n"); | |
7095 | } | |
7096 | } | |
7097 | ||
7098 | search_tidyup(); | |
7099 | ||
7100 | return 0; | |
7101 | } | |
7102 | ||
7103 | #endif | |
7104 | ||
9e4dddbd | 7105 | /* vi: aw ai sw=2 |
b9c2e32f | 7106 | */ |
059ec3d9 | 7107 | /* End of expand.c */ |