Commit | Line | Data |
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96535b98 | 1 | /* $Cambridge: exim/src/src/dkim.c,v 1.9 2009/11/12 13:02:17 nm4 Exp $ */ |
80a47a2c TK |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
7 | /* Copyright (c) University of Cambridge 2009 */ | |
8 | /* See the file NOTICE for conditions of use and distribution. */ | |
9 | ||
10 | /* Code for DKIM support. Other DKIM relevant code is in | |
11 | receive.c, transport.c and transports/smtp.c */ | |
12 | ||
13 | #include "exim.h" | |
14 | ||
15 | #ifndef DISABLE_DKIM | |
16 | ||
17 | #include "pdkim/pdkim.h" | |
18 | ||
19 | pdkim_ctx *dkim_verify_ctx = NULL; | |
20 | pdkim_signature *dkim_signatures = NULL; | |
21 | pdkim_signature *dkim_cur_sig = NULL; | |
22 | ||
23 | int dkim_exim_query_dns_txt(char *name, char *answer) { | |
24 | dns_answer dnsa; | |
25 | dns_scan dnss; | |
26 | dns_record *rr; | |
27 | ||
28 | if (dns_lookup(&dnsa, (uschar *)name, T_TXT, NULL) != DNS_SUCCEED) return PDKIM_FAIL; | |
29 | ||
30 | /* Search for TXT record */ | |
31 | for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS); | |
32 | rr != NULL; | |
33 | rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT)) | |
34 | if (rr->type == T_TXT) break; | |
35 | ||
36 | /* Copy record content to the answer buffer */ | |
37 | if (rr != NULL) { | |
38 | int rr_offset = 0; | |
39 | int answer_offset = 0; | |
40 | while (rr_offset < rr->size) { | |
41 | uschar len = (rr->data)[rr_offset++]; | |
42 | snprintf(answer+(answer_offset), | |
43 | PDKIM_DNS_TXT_MAX_RECLEN-(answer_offset), | |
44 | "%.*s", (int)len, (char *)((rr->data)+rr_offset)); | |
45 | rr_offset+=len; | |
46 | answer_offset+=len; | |
47 | } | |
48 | } | |
49 | else return PDKIM_FAIL; | |
50 | ||
51 | return PDKIM_OK; | |
52 | } | |
53 | ||
54 | ||
55 | void dkim_exim_verify_init(void) { | |
56 | ||
57 | /* Free previous context if there is one */ | |
58 | if (dkim_verify_ctx) pdkim_free_ctx(dkim_verify_ctx); | |
59 | ||
60 | /* Create new context */ | |
61 | dkim_verify_ctx = pdkim_init_verify(PDKIM_INPUT_SMTP, | |
62 | &dkim_exim_query_dns_txt | |
63 | ); | |
64 | ||
65 | if (dkim_verify_ctx != NULL) { | |
66 | dkim_collect_input = TRUE; | |
67 | pdkim_set_debug_stream(dkim_verify_ctx,debug_file); | |
68 | } | |
69 | else dkim_collect_input = FALSE; | |
70 | ||
71 | } | |
72 | ||
73 | ||
74 | void dkim_exim_verify_feed(uschar *data, int len) { | |
75 | if (dkim_collect_input && | |
76 | pdkim_feed(dkim_verify_ctx, | |
77 | (char *)data, | |
78 | len) != PDKIM_OK) dkim_collect_input = FALSE; | |
79 | } | |
80 | ||
81 | ||
82 | void dkim_exim_verify_finish(void) { | |
83 | pdkim_signature *sig = NULL; | |
9e5d6b55 TK |
84 | int dkim_signers_size = 0; |
85 | int dkim_signers_ptr = 0; | |
86 | dkim_signers = NULL; | |
80a47a2c TK |
87 | |
88 | /* Delete eventual previous signature chain */ | |
89 | dkim_signatures = NULL; | |
90 | ||
91 | /* If we have arrived here with dkim_collect_input == FALSE, it | |
92 | means there was a processing error somewhere along the way. | |
93 | Log the incident and disable futher verification. */ | |
94 | if (!dkim_collect_input) { | |
95 | log_write(0, LOG_MAIN|LOG_PANIC, "DKIM: Error while running this message through validation, disabling signature verification."); | |
96 | dkim_disable_verify = TRUE; | |
97 | return; | |
98 | } | |
99 | dkim_collect_input = FALSE; | |
100 | ||
101 | /* Finish DKIM operation and fetch link to signatures chain */ | |
102 | if (pdkim_feed_finish(dkim_verify_ctx,&dkim_signatures) != PDKIM_OK) return; | |
103 | ||
104 | sig = dkim_signatures; | |
105 | while (sig != NULL) { | |
106 | int size = 0; | |
107 | int ptr = 0; | |
108 | /* Log a line for each signature */ | |
109 | uschar *logmsg = string_append(NULL, &size, &ptr, 5, | |
110 | ||
111 | string_sprintf( "DKIM: d=%s s=%s c=%s/%s a=%s ", | |
112 | sig->domain, | |
113 | sig->selector, | |
114 | (sig->canon_headers == PDKIM_CANON_SIMPLE)?"simple":"relaxed", | |
115 | (sig->canon_body == PDKIM_CANON_SIMPLE)?"simple":"relaxed", | |
116 | (sig->algo == PDKIM_ALGO_RSA_SHA256)?"rsa-sha256":"rsa-sha1" | |
117 | ), | |
118 | ((sig->identity != NULL)? | |
119 | string_sprintf("i=%s ", sig->identity) | |
120 | : | |
121 | US"" | |
122 | ), | |
123 | ((sig->created > 0)? | |
124 | string_sprintf("t=%lu ", sig->created) | |
125 | : | |
126 | US"" | |
127 | ), | |
128 | ((sig->expires > 0)? | |
129 | string_sprintf("x=%lu ", sig->expires) | |
130 | : | |
131 | US"" | |
132 | ), | |
133 | ((sig->bodylength > -1)? | |
134 | string_sprintf("l=%lu ", sig->bodylength) | |
135 | : | |
136 | US"" | |
137 | ) | |
138 | ); | |
139 | ||
140 | switch(sig->verify_status) { | |
141 | case PDKIM_VERIFY_NONE: | |
142 | logmsg = string_append(logmsg, &size, &ptr, 1, "[not verified]"); | |
143 | break; | |
144 | case PDKIM_VERIFY_INVALID: | |
145 | logmsg = string_append(logmsg, &size, &ptr, 1, "[invalid - "); | |
146 | switch (sig->verify_ext_status) { | |
147 | case PDKIM_VERIFY_INVALID_PUBKEY_UNAVAILABLE: | |
148 | logmsg = string_append(logmsg, &size, &ptr, 1, "public key record (currently?) unavailable]"); | |
149 | break; | |
150 | case PDKIM_VERIFY_INVALID_BUFFER_SIZE: | |
151 | logmsg = string_append(logmsg, &size, &ptr, 1, "overlong public key record]"); | |
152 | break; | |
153 | case PDKIM_VERIFY_INVALID_PUBKEY_PARSING: | |
154 | logmsg = string_append(logmsg, &size, &ptr, 1, "syntax error in public key record]"); | |
155 | break; | |
156 | default: | |
157 | logmsg = string_append(logmsg, &size, &ptr, 1, "unspecified problem]"); | |
158 | } | |
159 | break; | |
160 | case PDKIM_VERIFY_FAIL: | |
161 | logmsg = string_append(logmsg, &size, &ptr, 1, "[verification failed - "); | |
162 | switch (sig->verify_ext_status) { | |
163 | case PDKIM_VERIFY_FAIL_BODY: | |
164 | logmsg = string_append(logmsg, &size, &ptr, 1, "body hash mismatch (body probably modified in transit)]"); | |
165 | break; | |
166 | case PDKIM_VERIFY_FAIL_MESSAGE: | |
167 | logmsg = string_append(logmsg, &size, &ptr, 1, "signature did not verify (headers probably modified in transit)]"); | |
168 | break; | |
169 | default: | |
170 | logmsg = string_append(logmsg, &size, &ptr, 1, "unspecified reason]"); | |
171 | } | |
172 | break; | |
173 | case PDKIM_VERIFY_PASS: | |
174 | logmsg = string_append(logmsg, &size, &ptr, 1, "[verification succeeded]"); | |
175 | break; | |
176 | } | |
177 | ||
178 | logmsg[ptr] = '\0'; | |
179 | log_write(0, LOG_MAIN, (char *)logmsg); | |
180 | ||
9e5d6b55 TK |
181 | /* Build a colon-separated list of signing domains (and identities, if present) in dkim_signers */ |
182 | dkim_signers = string_append(dkim_signers, | |
183 | &dkim_signers_size, | |
184 | &dkim_signers_ptr, | |
185 | 2, | |
186 | sig->domain, | |
187 | ":" | |
188 | ); | |
189 | ||
190 | if (sig->identity != NULL) { | |
191 | dkim_signers = string_append(dkim_signers, | |
192 | &dkim_signers_size, | |
193 | &dkim_signers_ptr, | |
194 | 2, | |
195 | sig->identity, | |
196 | ":" | |
197 | ); | |
198 | } | |
80a47a2c TK |
199 | |
200 | /* Process next signature */ | |
201 | sig = sig->next; | |
202 | } | |
203 | ||
0d2b278d TK |
204 | /* NULL-terminate and chop the last colon from the domain list */ |
205 | if (dkim_signers != NULL) { | |
206 | dkim_signers[dkim_signers_ptr] = '\0'; | |
207 | if (Ustrlen(dkim_signers) > 0) | |
208 | dkim_signers[Ustrlen(dkim_signers)-1] = '\0'; | |
209 | } | |
80a47a2c TK |
210 | } |
211 | ||
212 | ||
213 | void dkim_exim_acl_setup(uschar *id) { | |
214 | pdkim_signature *sig = dkim_signatures; | |
215 | dkim_cur_sig = NULL; | |
9e5d6b55 | 216 | dkim_cur_signer = id; |
80a47a2c | 217 | if (dkim_disable_verify || |
9e5d6b55 | 218 | !id || !dkim_verify_ctx) return; |
80a47a2c TK |
219 | /* Find signature to run ACL on */ |
220 | while (sig != NULL) { | |
221 | uschar *cmp_val = NULL; | |
222 | if (Ustrchr(id,'@') != NULL) cmp_val = (uschar *)sig->identity; | |
223 | else cmp_val = (uschar *)sig->domain; | |
224 | if (cmp_val && (strcmpic(cmp_val,id) == 0)) { | |
225 | dkim_cur_sig = sig; | |
226 | /* The "dkim_domain" and "dkim_selector" expansion variables have | |
227 | related globals, since they are used in the signing code too. | |
228 | Instead of inventing separate names for verification, we set | |
229 | them here. This is easy since a domain and selector is guaranteed | |
230 | to be in a signature. The other dkim_* expansion items are | |
231 | dynamically fetched from dkim_cur_sig at expansion time (see | |
232 | function below). */ | |
233 | dkim_signing_domain = (uschar *)sig->domain; | |
234 | dkim_signing_selector = (uschar *)sig->selector; | |
235 | return; | |
236 | } | |
237 | sig = sig->next; | |
238 | } | |
239 | } | |
240 | ||
241 | ||
242 | uschar *dkim_exim_expand_query(int what) { | |
243 | ||
244 | if (!dkim_verify_ctx || | |
245 | dkim_disable_verify || | |
246 | !dkim_cur_sig) return dkim_exim_expand_defaults(what); | |
247 | ||
248 | switch(what) { | |
249 | case DKIM_ALGO: | |
da5dfc3a TK |
250 | switch(dkim_cur_sig->algo) { |
251 | case PDKIM_ALGO_RSA_SHA1: | |
252 | return US"rsa-sha1"; | |
253 | case PDKIM_ALGO_RSA_SHA256: | |
254 | default: | |
255 | return US"rsa-sha256"; | |
256 | } | |
80a47a2c TK |
257 | case DKIM_BODYLENGTH: |
258 | return (dkim_cur_sig->bodylength >= 0)? | |
259 | (uschar *)string_sprintf(OFF_T_FMT,(LONGLONG_T)dkim_cur_sig->bodylength) | |
260 | :dkim_exim_expand_defaults(what); | |
261 | case DKIM_CANON_BODY: | |
da5dfc3a TK |
262 | switch(dkim_cur_sig->canon_body) { |
263 | case PDKIM_CANON_RELAXED: | |
264 | return US"relaxed"; | |
265 | case PDKIM_CANON_SIMPLE: | |
266 | default: | |
267 | return US"simple"; | |
268 | } | |
80a47a2c | 269 | case DKIM_CANON_HEADERS: |
da5dfc3a TK |
270 | switch(dkim_cur_sig->canon_headers) { |
271 | case PDKIM_CANON_RELAXED: | |
272 | return US"relaxed"; | |
273 | case PDKIM_CANON_SIMPLE: | |
274 | default: | |
275 | return US"simple"; | |
276 | } | |
80a47a2c TK |
277 | case DKIM_COPIEDHEADERS: |
278 | return dkim_cur_sig->copiedheaders? | |
279 | (uschar *)(dkim_cur_sig->copiedheaders) | |
280 | :dkim_exim_expand_defaults(what); | |
281 | case DKIM_CREATED: | |
282 | return (dkim_cur_sig->created > 0)? | |
283 | (uschar *)string_sprintf("%llu",dkim_cur_sig->created) | |
284 | :dkim_exim_expand_defaults(what); | |
285 | case DKIM_EXPIRES: | |
286 | return (dkim_cur_sig->expires > 0)? | |
287 | (uschar *)string_sprintf("%llu",dkim_cur_sig->expires) | |
288 | :dkim_exim_expand_defaults(what); | |
289 | case DKIM_HEADERNAMES: | |
290 | return dkim_cur_sig->headernames? | |
291 | (uschar *)(dkim_cur_sig->headernames) | |
292 | :dkim_exim_expand_defaults(what); | |
293 | case DKIM_IDENTITY: | |
294 | return dkim_cur_sig->identity? | |
295 | (uschar *)(dkim_cur_sig->identity) | |
296 | :dkim_exim_expand_defaults(what); | |
297 | case DKIM_KEY_GRANULARITY: | |
298 | return dkim_cur_sig->pubkey? | |
299 | (dkim_cur_sig->pubkey->granularity? | |
300 | (uschar *)(dkim_cur_sig->pubkey->granularity) | |
301 | :dkim_exim_expand_defaults(what) | |
302 | ) | |
303 | :dkim_exim_expand_defaults(what); | |
304 | case DKIM_KEY_SRVTYPE: | |
305 | return dkim_cur_sig->pubkey? | |
306 | (dkim_cur_sig->pubkey->srvtype? | |
307 | (uschar *)(dkim_cur_sig->pubkey->srvtype) | |
308 | :dkim_exim_expand_defaults(what) | |
309 | ) | |
310 | :dkim_exim_expand_defaults(what); | |
311 | case DKIM_KEY_NOTES: | |
312 | return dkim_cur_sig->pubkey? | |
313 | (dkim_cur_sig->pubkey->notes? | |
314 | (uschar *)(dkim_cur_sig->pubkey->notes) | |
315 | :dkim_exim_expand_defaults(what) | |
316 | ) | |
317 | :dkim_exim_expand_defaults(what); | |
318 | case DKIM_KEY_TESTING: | |
319 | return dkim_cur_sig->pubkey? | |
320 | (dkim_cur_sig->pubkey->testing? | |
321 | US"1" | |
322 | :dkim_exim_expand_defaults(what) | |
323 | ) | |
324 | :dkim_exim_expand_defaults(what); | |
325 | case DKIM_NOSUBDOMAINS: | |
326 | return dkim_cur_sig->pubkey? | |
327 | (dkim_cur_sig->pubkey->no_subdomaining? | |
328 | US"1" | |
329 | :dkim_exim_expand_defaults(what) | |
330 | ) | |
331 | :dkim_exim_expand_defaults(what); | |
332 | case DKIM_VERIFY_STATUS: | |
333 | switch(dkim_cur_sig->verify_status) { | |
334 | case PDKIM_VERIFY_INVALID: | |
335 | return US"invalid"; | |
336 | case PDKIM_VERIFY_FAIL: | |
337 | return US"fail"; | |
338 | case PDKIM_VERIFY_PASS: | |
339 | return US"pass"; | |
340 | case PDKIM_VERIFY_NONE: | |
341 | default: | |
342 | return US"none"; | |
343 | } | |
344 | case DKIM_VERIFY_REASON: | |
345 | switch (dkim_cur_sig->verify_ext_status) { | |
346 | case PDKIM_VERIFY_INVALID_PUBKEY_UNAVAILABLE: | |
347 | return US"pubkey_unavailable"; | |
348 | case PDKIM_VERIFY_INVALID_PUBKEY_PARSING: | |
349 | return US"pubkey_syntax"; | |
350 | case PDKIM_VERIFY_FAIL_BODY: | |
351 | return US"bodyhash_mismatch"; | |
352 | case PDKIM_VERIFY_FAIL_MESSAGE: | |
353 | return US"signature_incorrect"; | |
354 | } | |
355 | default: | |
356 | return US""; | |
357 | } | |
358 | } | |
359 | ||
360 | ||
361 | uschar *dkim_exim_expand_defaults(int what) { | |
362 | switch(what) { | |
363 | case DKIM_ALGO: return US""; | |
364 | case DKIM_BODYLENGTH: return US"9999999999999"; | |
365 | case DKIM_CANON_BODY: return US""; | |
366 | case DKIM_CANON_HEADERS: return US""; | |
367 | case DKIM_COPIEDHEADERS: return US""; | |
368 | case DKIM_CREATED: return US"0"; | |
369 | case DKIM_EXPIRES: return US"9999999999999"; | |
370 | case DKIM_HEADERNAMES: return US""; | |
371 | case DKIM_IDENTITY: return US""; | |
372 | case DKIM_KEY_GRANULARITY: return US"*"; | |
373 | case DKIM_KEY_SRVTYPE: return US"*"; | |
374 | case DKIM_KEY_NOTES: return US""; | |
375 | case DKIM_KEY_TESTING: return US"0"; | |
376 | case DKIM_NOSUBDOMAINS: return US"0"; | |
377 | case DKIM_VERIFY_STATUS: return US"none"; | |
378 | case DKIM_VERIFY_REASON: return US""; | |
379 | default: return US""; | |
380 | } | |
381 | } | |
382 | ||
383 | ||
384 | uschar *dkim_exim_sign(int dkim_fd, | |
385 | uschar *dkim_private_key, | |
386 | uschar *dkim_domain, | |
387 | uschar *dkim_selector, | |
388 | uschar *dkim_canon, | |
389 | uschar *dkim_sign_headers) { | |
390 | pdkim_ctx *ctx = NULL; | |
391 | uschar *rc = NULL; | |
392 | pdkim_signature *signature; | |
393 | int pdkim_canon; | |
394 | int sread; | |
395 | char buf[4096]; | |
396 | int save_errno = 0; | |
397 | int old_pool = store_pool; | |
398 | ||
399 | dkim_domain = expand_string(dkim_domain); | |
400 | if (dkim_domain == NULL) { | |
401 | /* expansion error, do not send message. */ | |
402 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand " | |
403 | "dkim_domain: %s", expand_string_message); | |
404 | rc = NULL; | |
405 | goto CLEANUP; | |
406 | } | |
407 | /* Set up $dkim_domain expansion variable. */ | |
408 | dkim_signing_domain = dkim_domain; | |
409 | ||
410 | /* Get selector to use. */ | |
411 | dkim_selector = expand_string(dkim_selector); | |
412 | if (dkim_selector == NULL) { | |
413 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand " | |
414 | "dkim_selector: %s", expand_string_message); | |
415 | rc = NULL; | |
416 | goto CLEANUP; | |
417 | } | |
418 | /* Set up $dkim_selector expansion variable. */ | |
419 | dkim_signing_selector = dkim_selector; | |
420 | ||
421 | /* Get canonicalization to use */ | |
422 | dkim_canon = expand_string(dkim_canon?dkim_canon:US"relaxed"); | |
423 | if (dkim_canon == NULL) { | |
424 | /* expansion error, do not send message. */ | |
425 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand " | |
426 | "dkim_canon: %s", expand_string_message); | |
427 | rc = NULL; | |
428 | goto CLEANUP; | |
429 | } | |
430 | if (Ustrcmp(dkim_canon, "relaxed") == 0) | |
431 | pdkim_canon = PDKIM_CANON_RELAXED; | |
432 | else if (Ustrcmp(dkim_canon, "simple") == 0) | |
96535b98 | 433 | pdkim_canon = PDKIM_CANON_SIMPLE; |
80a47a2c TK |
434 | else { |
435 | log_write(0, LOG_MAIN, "DKIM: unknown canonicalization method '%s', defaulting to 'relaxed'.\n",dkim_canon); | |
436 | pdkim_canon = PDKIM_CANON_RELAXED; | |
437 | } | |
438 | ||
439 | /* Expand signing headers once */ | |
440 | if (dkim_sign_headers != NULL) { | |
441 | dkim_sign_headers = expand_string(dkim_sign_headers); | |
442 | if (dkim_sign_headers == NULL) { | |
443 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand " | |
444 | "dkim_sign_headers: %s", expand_string_message); | |
445 | rc = NULL; | |
446 | goto CLEANUP; | |
447 | } | |
448 | } | |
449 | ||
450 | /* Get private key to use. */ | |
451 | dkim_private_key = expand_string(dkim_private_key); | |
452 | if (dkim_private_key == NULL) { | |
453 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand " | |
454 | "dkim_private_key: %s", expand_string_message); | |
455 | rc = NULL; | |
456 | goto CLEANUP; | |
457 | } | |
458 | if ( (Ustrlen(dkim_private_key) == 0) || | |
459 | (Ustrcmp(dkim_private_key,"0") == 0) || | |
460 | (Ustrcmp(dkim_private_key,"false") == 0) ) { | |
461 | /* don't sign, but no error */ | |
462 | rc = US""; | |
463 | goto CLEANUP; | |
464 | } | |
465 | ||
466 | if (dkim_private_key[0] == '/') { | |
467 | int privkey_fd = 0; | |
468 | /* Looks like a filename, load the private key. */ | |
469 | memset(big_buffer,0,big_buffer_size); | |
470 | privkey_fd = open(CS dkim_private_key,O_RDONLY); | |
cf745305 TK |
471 | if (privkey_fd < 0) { |
472 | log_write(0, LOG_MAIN|LOG_PANIC, "unable to open " | |
473 | "private key file for reading: %s", dkim_private_key); | |
474 | rc = NULL; | |
475 | goto CLEANUP; | |
476 | } | |
477 | (void)read(privkey_fd,big_buffer,(big_buffer_size-2)); | |
80a47a2c TK |
478 | (void)close(privkey_fd); |
479 | dkim_private_key = big_buffer; | |
480 | } | |
481 | ||
482 | ctx = pdkim_init_sign(PDKIM_INPUT_SMTP, | |
483 | (char *)dkim_signing_domain, | |
484 | (char *)dkim_signing_selector, | |
485 | (char *)dkim_private_key | |
486 | ); | |
487 | ||
488 | pdkim_set_debug_stream(ctx,debug_file); | |
489 | ||
490 | pdkim_set_optional(ctx, | |
491 | (char *)dkim_sign_headers, | |
492 | NULL, | |
493 | pdkim_canon, | |
494 | pdkim_canon, | |
495 | -1, | |
496 | PDKIM_ALGO_RSA_SHA256, | |
497 | 0, | |
498 | 0); | |
499 | ||
500 | while((sread = read(dkim_fd,&buf,4096)) > 0) { | |
501 | if (pdkim_feed(ctx,buf,sread) != PDKIM_OK) { | |
502 | rc = NULL; | |
503 | goto CLEANUP; | |
504 | } | |
505 | } | |
506 | /* Handle failed read above. */ | |
507 | if (sread == -1) { | |
508 | debug_printf("DKIM: Error reading -K file.\n"); | |
509 | save_errno = errno; | |
510 | rc = NULL; | |
511 | goto CLEANUP; | |
512 | } | |
513 | ||
514 | if (pdkim_feed_finish(ctx,&signature) != PDKIM_OK) | |
515 | goto CLEANUP; | |
516 | ||
517 | rc = store_get(strlen(signature->signature_header)+3); | |
518 | Ustrcpy(rc,US signature->signature_header); | |
519 | Ustrcat(rc,US"\r\n"); | |
520 | ||
521 | CLEANUP: | |
522 | if (ctx != NULL) { | |
523 | pdkim_free_ctx(ctx); | |
524 | } | |
525 | store_pool = old_pool; | |
526 | errno = save_errno; | |
527 | return rc; | |
93f2d376 | 528 | } |
80a47a2c TK |
529 | |
530 | #endif |