Commit | Line | Data |
---|---|---|
9d1c15ef JH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
1fbf41cd | 5 | /* Copyright (c) Jeremy Harris 2014 - 2019 */ |
9d1c15ef JH |
6 | |
7 | /* This module provides TLS (aka SSL) support for Exim using the OpenSSL | |
8 | library. It is #included into the tls.c file when that library is used. | |
9 | */ | |
10 | ||
11 | ||
12 | /* Heading stuff */ | |
13 | ||
14 | #include <openssl/lhash.h> | |
15 | #include <openssl/ssl.h> | |
16 | #include <openssl/err.h> | |
17 | #include <openssl/rand.h> | |
51424d08 | 18 | #include <openssl/x509v3.h> |
9d1c15ef | 19 | |
1fbf41cd JH |
20 | #ifdef LIBRESSL_VERSION_NUMBER /* LibreSSL */ |
21 | # if LIBRESSL_VERSION_NUMBER >= 0x2090000fL | |
22 | # define EXIM_HAVE_ASN1_MACROS | |
23 | # endif | |
24 | #else /* OpenSSL */ | |
25 | # if OPENSSL_VERSION_NUMBER >= 0x10100000L | |
26 | # define EXIM_HAVE_ASN1_MACROS | |
27 | # endif | |
c8dfb21d JH |
28 | #endif |
29 | ||
3ae79556 JH |
30 | #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER) |
31 | # define ASN1_STRING_get0_data ASN1_STRING_data | |
32 | #endif | |
9d1c15ef JH |
33 | |
34 | /***************************************************** | |
35 | * Export/import a certificate, binary/printable | |
36 | *****************************************************/ | |
37 | int | |
38 | tls_export_cert(uschar * buf, size_t buflen, void * cert) | |
39 | { | |
40 | BIO * bp = BIO_new(BIO_s_mem()); | |
41 | int fail; | |
42 | ||
43 | if ((fail = PEM_write_bio_X509(bp, (X509 *)cert) ? 0 : 1)) | |
44 | log_write(0, LOG_MAIN, "TLS error in certificate export: %s", | |
45 | ERR_error_string(ERR_get_error(), NULL)); | |
46 | else | |
47 | { | |
48 | char * cp = CS buf; | |
49 | int n; | |
50 | buflen -= 2; | |
51 | for(;;) | |
52 | { | |
53 | if ((n = BIO_gets(bp, cp, (int)buflen)) <= 0) break; | |
54 | cp += n+1; | |
55 | buflen -= n+1; | |
56 | cp[-2] = '\\'; cp[-1] = 'n'; /* newline->"\n" */ | |
57 | } /* compat with string_printing() */ | |
58 | *cp = '\0'; | |
59 | } | |
60 | ||
61 | BIO_free(bp); | |
62 | return fail; | |
63 | } | |
64 | ||
65 | int | |
66 | tls_import_cert(const uschar * buf, void ** cert) | |
67 | { | |
68 | void * reset_point = store_get(0); | |
69 | const uschar * cp = string_unprinting(US buf); | |
70 | BIO * bp; | |
152e7604 | 71 | X509 * x = *(X509 **)cert; |
c03fae8a | 72 | int fail = 0; |
9d1c15ef | 73 | |
152e7604 JH |
74 | if (x) X509_free(x); |
75 | ||
9d1c15ef | 76 | bp = BIO_new_mem_buf(US cp, -1); |
c03fae8a JH |
77 | if (!(x = PEM_read_bio_X509(bp, NULL, 0, NULL))) |
78 | { | |
79 | log_write(0, LOG_MAIN, "TLS error in certificate import: %s", | |
80 | ERR_error_string(ERR_get_error(), NULL)); | |
9d1c15ef | 81 | fail = 1; |
c03fae8a | 82 | } |
9d1c15ef JH |
83 | else |
84 | *cert = (void *)x; | |
85 | BIO_free(bp); | |
86 | store_reset(reset_point); | |
87 | return fail; | |
88 | } | |
89 | ||
90 | void | |
790fbb71 | 91 | tls_free_cert(void ** cert) |
9d1c15ef | 92 | { |
790fbb71 JH |
93 | X509 * x = *(X509 **)cert; |
94 | if (x) | |
95 | { | |
96 | X509_free(x); | |
97 | *cert = NULL; | |
98 | } | |
9d1c15ef JH |
99 | } |
100 | ||
c03fae8a | 101 | |
9d1c15ef JH |
102 | /***************************************************** |
103 | * Certificate field extraction routines | |
104 | *****************************************************/ | |
c03fae8a JH |
105 | |
106 | /* First, some internal service functions */ | |
107 | ||
108 | static uschar * | |
109 | badalloc(void) | |
110 | { | |
111 | expand_string_message = US"allocation failure"; | |
112 | return NULL; | |
113 | } | |
114 | ||
9d1c15ef JH |
115 | static uschar * |
116 | bio_string_copy(BIO * bp, int len) | |
117 | { | |
e3dd1d67 | 118 | uschar * cp = US""; |
9d1c15ef JH |
119 | len = len > 0 ? (int) BIO_get_mem_data(bp, &cp) : 0; |
120 | cp = string_copyn(cp, len); | |
121 | BIO_free(bp); | |
122 | return cp; | |
123 | } | |
124 | ||
125 | static uschar * | |
e9477a08 | 126 | asn1_time_copy(const ASN1_TIME * asntime, uschar * mod) |
9d1c15ef | 127 | { |
e9477a08 | 128 | uschar * s = NULL; |
9d1c15ef | 129 | BIO * bp = BIO_new(BIO_s_mem()); |
c03fae8a JH |
130 | int len; |
131 | ||
e9477a08 JH |
132 | if (!bp) |
133 | return badalloc(); | |
134 | len = ASN1_TIME_print(bp, asntime); | |
d4ff61d1 | 135 | len = len > 0 ? (int) BIO_get_mem_data(bp, CSS &s) : 0; |
c03fae8a | 136 | |
e9477a08 JH |
137 | if (mod && Ustrcmp(mod, "raw") == 0) /* native ASN */ |
138 | s = string_copyn(s, len); | |
139 | else | |
140 | { | |
141 | struct tm tm; | |
142 | struct tm * tm_p = &tm; | |
755762fd | 143 | BOOL mod_tz = TRUE; |
45500060 | 144 | uschar * tz = to_tz(US"GMT0"); /* need to call strptime with baseline TZ */ |
e9477a08 JH |
145 | |
146 | /* Parse OpenSSL ASN1_TIME_print output. A shame there seems to | |
147 | be no other interface for the times. | |
148 | */ | |
149 | ||
150 | /*XXX %Z might be glibc-specific? Solaris has it, at least*/ | |
151 | /*XXX should we switch to POSIX locale for this? */ | |
152 | tm.tm_isdst = 0; | |
d4ff61d1 | 153 | if (!len || !strptime(CCS s, "%b %e %T %Y %Z", &tm)) |
e9477a08 JH |
154 | expand_string_message = US"failed time conversion"; |
155 | ||
156 | else | |
157 | { | |
158 | time_t t = mktime(&tm); /* make the tm self-consistent */ | |
159 | ||
160 | if (mod && Ustrcmp(mod, "int") == 0) /* seconds since epoch */ | |
bb07bcd3 | 161 | s = string_sprintf(TIME_T_FMT, t); |
e9477a08 JH |
162 | |
163 | else | |
164 | { | |
8768d548 | 165 | if (!f.timestamps_utc) /* decoded string in local TZ */ |
e9477a08 JH |
166 | { /* shift to local TZ */ |
167 | restore_tz(tz); | |
168 | mod_tz = FALSE; | |
169 | tm_p = localtime(&t); | |
170 | } | |
171 | /* "utc" is default, and rfc5280 says cert times should be Zulu */ | |
172 | ||
173 | /* convert to string in our format */ | |
174 | len = 32; | |
175 | s = store_get(len); | |
176 | strftime(CS s, (size_t)len, "%b %e %T %Y %z", tm_p); | |
177 | } | |
178 | } | |
179 | ||
755762fd | 180 | if (mod_tz) |
e9477a08 JH |
181 | restore_tz(tz); |
182 | } | |
183 | BIO_free(bp); | |
184 | return s; | |
9d1c15ef JH |
185 | } |
186 | ||
187 | static uschar * | |
188 | x509_name_copy(X509_NAME * name) | |
189 | { | |
190 | BIO * bp = BIO_new(BIO_s_mem()); | |
c03fae8a JH |
191 | int len_good; |
192 | ||
193 | if (!bp) return badalloc(); | |
194 | ||
195 | len_good = | |
9d1c15ef JH |
196 | X509_NAME_print_ex(bp, name, 0, XN_FLAG_RFC2253) >= 0 |
197 | ? 1 : 0; | |
198 | return bio_string_copy(bp, len_good); | |
199 | } | |
200 | ||
201 | /**/ | |
c03fae8a JH |
202 | /* Now the extractors, called from expand.c |
203 | Arguments: | |
204 | cert The certificate | |
205 | mod Optional modifiers for the operator | |
206 | ||
207 | Return: | |
208 | Allocated string with extracted value | |
209 | */ | |
9d1c15ef JH |
210 | |
211 | uschar * | |
9e4dddbd | 212 | tls_cert_issuer(void * cert, uschar * mod) |
9d1c15ef | 213 | { |
812a6045 JH |
214 | uschar * cp = x509_name_copy(X509_get_issuer_name((X509 *)cert)); |
215 | return mod ? tls_field_from_dn(cp, mod) : cp; | |
9d1c15ef JH |
216 | } |
217 | ||
218 | uschar * | |
9e4dddbd | 219 | tls_cert_not_before(void * cert, uschar * mod) |
9d1c15ef | 220 | { |
25ba2544 | 221 | return asn1_time_copy(X509_get_notBefore((X509 *)cert), mod); |
9d1c15ef JH |
222 | } |
223 | ||
224 | uschar * | |
9e4dddbd | 225 | tls_cert_not_after(void * cert, uschar * mod) |
9d1c15ef | 226 | { |
25ba2544 | 227 | return asn1_time_copy(X509_get_notAfter((X509 *)cert), mod); |
9d1c15ef JH |
228 | } |
229 | ||
230 | uschar * | |
9e4dddbd | 231 | tls_cert_serial_number(void * cert, uschar * mod) |
9d1c15ef JH |
232 | { |
233 | uschar txt[256]; | |
234 | BIO * bp = BIO_new(BIO_s_mem()); | |
c03fae8a | 235 | int len; |
9d1c15ef | 236 | |
c03fae8a JH |
237 | if (!bp) return badalloc(); |
238 | ||
239 | len = i2a_ASN1_INTEGER(bp, X509_get_serialNumber((X509 *)cert)); | |
9d1c15ef JH |
240 | if (len < sizeof(txt)) |
241 | BIO_read(bp, txt, len); | |
242 | else | |
243 | len = 0; | |
244 | BIO_free(bp); | |
245 | return string_copynlc(txt, len); /* lowercase */ | |
246 | } | |
247 | ||
248 | uschar * | |
9e4dddbd | 249 | tls_cert_signature(void * cert, uschar * mod) |
9d1c15ef | 250 | { |
9d1c15ef | 251 | uschar * cp = NULL; |
c03fae8a JH |
252 | BIO * bp = BIO_new(BIO_s_mem()); |
253 | ||
254 | if (!bp) return badalloc(); | |
9d1c15ef JH |
255 | |
256 | if (X509_print_ex(bp, (X509 *)cert, 0, | |
94431adb HSHR |
257 | X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION | X509_FLAG_NO_SERIAL | |
258 | X509_FLAG_NO_SIGNAME | X509_FLAG_NO_ISSUER | X509_FLAG_NO_VALIDITY | | |
259 | X509_FLAG_NO_SUBJECT | X509_FLAG_NO_PUBKEY | X509_FLAG_NO_EXTENSIONS | | |
9d1c15ef JH |
260 | /* X509_FLAG_NO_SIGDUMP is the missing one */ |
261 | X509_FLAG_NO_AUX) == 1) | |
262 | { | |
263 | long len = BIO_get_mem_data(bp, &cp); | |
315e209a JH |
264 | |
265 | /* Strip leading "Signature Algorithm" line */ | |
266 | while (*cp && *cp != '\n') { cp++; len--; } | |
267 | ||
268 | cp = string_copyn(cp+1, len-1); | |
9d1c15ef JH |
269 | } |
270 | BIO_free(bp); | |
271 | return cp; | |
272 | } | |
273 | ||
274 | uschar * | |
9e4dddbd | 275 | tls_cert_signature_algorithm(void * cert, uschar * mod) |
9d1c15ef | 276 | { |
315e209a JH |
277 | uschar * cp = NULL; |
278 | BIO * bp = BIO_new(BIO_s_mem()); | |
279 | ||
280 | if (!bp) return badalloc(); | |
281 | ||
282 | if (X509_print_ex(bp, (X509 *)cert, 0, | |
94431adb | 283 | X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION | X509_FLAG_NO_SERIAL | |
315e209a | 284 | /* X509_FLAG_NO_SIGNAME is the missing one */ |
94431adb HSHR |
285 | X509_FLAG_NO_ISSUER | X509_FLAG_NO_VALIDITY | |
286 | X509_FLAG_NO_SUBJECT | X509_FLAG_NO_PUBKEY | X509_FLAG_NO_EXTENSIONS | | |
315e209a JH |
287 | X509_FLAG_NO_SIGDUMP | X509_FLAG_NO_AUX) == 1) |
288 | { | |
289 | long len = BIO_get_mem_data(bp, &cp); | |
290 | ||
291 | /* Strip leading " Signature Algorithm: " and trailing newline */ | |
292 | while (*cp && *cp != ':') { cp++; len--; } | |
293 | do { cp++; len--; } while (*cp && *cp == ' '); | |
294 | if (cp[len-1] == '\n') len--; | |
295 | ||
296 | cp = string_copyn(cp, len); | |
297 | } | |
298 | BIO_free(bp); | |
299 | return cp; | |
9d1c15ef JH |
300 | } |
301 | ||
302 | uschar * | |
9e4dddbd | 303 | tls_cert_subject(void * cert, uschar * mod) |
9d1c15ef | 304 | { |
812a6045 JH |
305 | uschar * cp = x509_name_copy(X509_get_subject_name((X509 *)cert)); |
306 | return mod ? tls_field_from_dn(cp, mod) : cp; | |
9d1c15ef JH |
307 | } |
308 | ||
309 | uschar * | |
9e4dddbd | 310 | tls_cert_version(void * cert, uschar * mod) |
9d1c15ef | 311 | { |
bb07bcd3 | 312 | return string_sprintf("%ld", X509_get_version((X509 *)cert)); |
9d1c15ef JH |
313 | } |
314 | ||
315 | uschar * | |
316 | tls_cert_ext_by_oid(void * cert, uschar * oid, int idx) | |
317 | { | |
e3dd1d67 | 318 | int nid = OBJ_create(CS oid, "", ""); |
9d1c15ef JH |
319 | int nidx = X509_get_ext_by_NID((X509 *)cert, nid, idx); |
320 | X509_EXTENSION * ex = X509_get_ext((X509 *)cert, nidx); | |
321 | ASN1_OCTET_STRING * adata = X509_EXTENSION_get_data(ex); | |
322 | BIO * bp = BIO_new(BIO_s_mem()); | |
323 | long len; | |
324 | uschar * cp1; | |
325 | uschar * cp2; | |
326 | uschar * cp3; | |
327 | ||
c03fae8a JH |
328 | if (!bp) return badalloc(); |
329 | ||
c8dfb21d JH |
330 | #ifdef EXIM_HAVE_ASN1_MACROS |
331 | ASN1_STRING_print(bp, adata); | |
332 | #else | |
9d1c15ef | 333 | M_ASN1_OCTET_STRING_print(bp, adata); |
c8dfb21d | 334 | #endif |
9d1c15ef | 335 | |
c8dfb21d | 336 | /* binary data, DER encoded */ |
9d1c15ef JH |
337 | /* just dump for now */ |
338 | len = BIO_get_mem_data(bp, &cp1); | |
339 | cp3 = cp2 = store_get(len*3+1); | |
340 | ||
341 | while(len) | |
342 | { | |
5976eb99 | 343 | cp2 += sprintf(CS cp2, "%.2x ", *cp1++); |
9d1c15ef JH |
344 | len--; |
345 | } | |
346 | cp2[-1] = '\0'; | |
347 | ||
348 | return cp3; | |
349 | } | |
350 | ||
351 | uschar * | |
9e4dddbd | 352 | tls_cert_subject_altname(void * cert, uschar * mod) |
9d1c15ef | 353 | { |
acec9514 | 354 | gstring * list = NULL; |
9d1c15ef JH |
355 | STACK_OF(GENERAL_NAME) * san = (STACK_OF(GENERAL_NAME) *) |
356 | X509_get_ext_d2i((X509 *)cert, NID_subject_alt_name, NULL, NULL); | |
b3ef41c9 | 357 | uschar osep = '\n'; |
9e4dddbd JH |
358 | uschar * tag = US""; |
359 | uschar * ele; | |
360 | int match = -1; | |
e51c7be2 | 361 | int len; |
9d1c15ef JH |
362 | |
363 | if (!san) return NULL; | |
364 | ||
b3ef41c9 | 365 | while (mod && *mod) |
9e4dddbd | 366 | { |
b3ef41c9 JH |
367 | if (*mod == '>' && *++mod) osep = *mod++; |
368 | else if (Ustrncmp(mod,"dns",3)==0) { match = GEN_DNS; mod += 3; } | |
369 | else if (Ustrncmp(mod,"uri",3)==0) { match = GEN_URI; mod += 3; } | |
370 | else if (Ustrncmp(mod,"mail",4)==0) { match = GEN_EMAIL; mod += 4; } | |
371 | else mod++; | |
9e4dddbd | 372 | |
b3ef41c9 | 373 | if (*mod == ',') mod++; |
9e4dddbd JH |
374 | } |
375 | ||
9d1c15ef JH |
376 | while (sk_GENERAL_NAME_num(san) > 0) |
377 | { | |
378 | GENERAL_NAME * namePart = sk_GENERAL_NAME_pop(san); | |
9e4dddbd JH |
379 | if (match != -1 && match != namePart->type) |
380 | continue; | |
9d1c15ef JH |
381 | switch (namePart->type) |
382 | { | |
9e4dddbd JH |
383 | case GEN_DNS: |
384 | tag = US"DNS"; | |
3ae79556 | 385 | ele = US ASN1_STRING_get0_data(namePart->d.dNSName); |
e51c7be2 | 386 | len = ASN1_STRING_length(namePart->d.dNSName); |
9e4dddbd | 387 | break; |
9d1c15ef | 388 | case GEN_URI: |
9e4dddbd | 389 | tag = US"URI"; |
3ae79556 | 390 | ele = US ASN1_STRING_get0_data(namePart->d.uniformResourceIdentifier); |
e51c7be2 | 391 | len = ASN1_STRING_length(namePart->d.uniformResourceIdentifier); |
9e4dddbd | 392 | break; |
9d1c15ef | 393 | case GEN_EMAIL: |
9e4dddbd | 394 | tag = US"MAIL"; |
3ae79556 | 395 | ele = US ASN1_STRING_get0_data(namePart->d.rfc822Name); |
e51c7be2 | 396 | len = ASN1_STRING_length(namePart->d.rfc822Name); |
9e4dddbd | 397 | break; |
9d1c15ef | 398 | default: |
9e4dddbd | 399 | continue; /* ignore unrecognised types */ |
9d1c15ef | 400 | } |
e51c7be2 JH |
401 | if (ele[len]) /* not nul-terminated */ |
402 | ele = string_copyn(ele, len); | |
403 | ||
9acf6b94 | 404 | if (Ustrlen(ele) == len) /* ignore any with embedded nul */ |
acec9514 | 405 | list = string_append_listele(list, osep, |
9e4dddbd | 406 | match == -1 ? string_sprintf("%s=%s", tag, ele) : ele); |
9d1c15ef JH |
407 | } |
408 | ||
9e4dddbd | 409 | sk_GENERAL_NAME_free(san); |
acec9514 | 410 | return string_from_gstring(list); |
9d1c15ef JH |
411 | } |
412 | ||
413 | uschar * | |
9e4dddbd | 414 | tls_cert_ocsp_uri(void * cert, uschar * mod) |
9d1c15ef JH |
415 | { |
416 | STACK_OF(ACCESS_DESCRIPTION) * ads = (STACK_OF(ACCESS_DESCRIPTION) *) | |
417 | X509_get_ext_d2i((X509 *)cert, NID_info_access, NULL, NULL); | |
418 | int adsnum = sk_ACCESS_DESCRIPTION_num(ads); | |
9e4dddbd | 419 | uschar sep = '\n'; |
acec9514 | 420 | gstring * list = NULL; |
9e4dddbd JH |
421 | |
422 | if (mod) | |
423 | if (*mod == '>' && *++mod) sep = *mod++; | |
9d1c15ef | 424 | |
d7978c0f | 425 | for (int i = 0; i < adsnum; i++) |
9d1c15ef JH |
426 | { |
427 | ACCESS_DESCRIPTION * ad = sk_ACCESS_DESCRIPTION_value(ads, i); | |
428 | ||
429 | if (ad && OBJ_obj2nid(ad->method) == NID_ad_OCSP) | |
acec9514 | 430 | list = string_append_listele_n(list, sep, |
3ae79556 | 431 | US ASN1_STRING_get0_data(ad->location->d.ia5), |
4226691b | 432 | ASN1_STRING_length(ad->location->d.ia5)); |
9d1c15ef | 433 | } |
00ba27c5 | 434 | sk_ACCESS_DESCRIPTION_free(ads); |
acec9514 | 435 | return string_from_gstring(list); |
9d1c15ef JH |
436 | } |
437 | ||
438 | uschar * | |
9e4dddbd | 439 | tls_cert_crl_uri(void * cert, uschar * mod) |
9d1c15ef JH |
440 | { |
441 | STACK_OF(DIST_POINT) * dps = (STACK_OF(DIST_POINT) *) | |
442 | X509_get_ext_d2i((X509 *)cert, NID_crl_distribution_points, | |
443 | NULL, NULL); | |
444 | DIST_POINT * dp; | |
9e4dddbd | 445 | uschar sep = '\n'; |
acec9514 | 446 | gstring * list = NULL; |
9e4dddbd JH |
447 | |
448 | if (mod) | |
449 | if (*mod == '>' && *++mod) sep = *mod++; | |
9d1c15ef | 450 | |
d7978c0f | 451 | if (dps) for (int i = 0, dpsnum = sk_DIST_POINT_num(dps); i < dpsnum; i++) |
9d1c15ef JH |
452 | if ((dp = sk_DIST_POINT_value(dps, i))) |
453 | { | |
454 | STACK_OF(GENERAL_NAME) * names = dp->distpoint->name.fullname; | |
455 | GENERAL_NAME * np; | |
9d1c15ef | 456 | |
d7978c0f | 457 | for (int j = 0, nnum = sk_GENERAL_NAME_num(names); j < nnum; j++) |
9d1c15ef JH |
458 | if ( (np = sk_GENERAL_NAME_value(names, j)) |
459 | && np->type == GEN_URI | |
460 | ) | |
acec9514 | 461 | list = string_append_listele_n(list, sep, |
3ae79556 | 462 | US ASN1_STRING_get0_data(np->d.uniformResourceIdentifier), |
4226691b | 463 | ASN1_STRING_length(np->d.uniformResourceIdentifier)); |
9d1c15ef | 464 | } |
00ba27c5 | 465 | sk_DIST_POINT_free(dps); |
acec9514 | 466 | return string_from_gstring(list); |
9d1c15ef JH |
467 | } |
468 | ||
6a8a60e0 JH |
469 | |
470 | ||
471 | /***************************************************** | |
472 | * Certificate operator routines | |
473 | *****************************************************/ | |
59b87190 JH |
474 | uschar * |
475 | tls_cert_der_b64(void * cert) | |
476 | { | |
477 | BIO * bp = BIO_new(BIO_s_mem()); | |
478 | uschar * cp = NULL; | |
479 | ||
480 | if (!i2d_X509_bio(bp, (X509 *)cert)) | |
481 | log_write(0, LOG_MAIN, "TLS error in certificate export: %s", | |
482 | ERR_error_string(ERR_get_error(), NULL)); | |
483 | else | |
484 | { | |
485 | long len = BIO_get_mem_data(bp, &cp); | |
1f20760b | 486 | cp = b64encode(CUS cp, (int)len); |
59b87190 JH |
487 | } |
488 | ||
489 | BIO_free(bp); | |
490 | return cp; | |
491 | } | |
492 | ||
493 | ||
6a8a60e0 JH |
494 | static uschar * |
495 | fingerprint(X509 * cert, const EVP_MD * fdig) | |
496 | { | |
6a8a60e0 JH |
497 | unsigned int n; |
498 | uschar md[EVP_MAX_MD_SIZE]; | |
499 | uschar * cp; | |
500 | ||
501 | if (!X509_digest(cert,fdig,md,&n)) | |
502 | { | |
503 | expand_string_message = US"tls_cert_fprt: out of mem\n"; | |
504 | return NULL; | |
505 | } | |
506 | cp = store_get(n*2+1); | |
d7978c0f | 507 | for (int j = 0; j < (int)n; j++) sprintf(CS cp+2*j, "%02X", md[j]); |
6a8a60e0 JH |
508 | return(cp); |
509 | } | |
510 | ||
94431adb | 511 | uschar * |
6a8a60e0 JH |
512 | tls_cert_fprt_md5(void * cert) |
513 | { | |
514 | return fingerprint((X509 *)cert, EVP_md5()); | |
515 | } | |
516 | ||
94431adb | 517 | uschar * |
6a8a60e0 JH |
518 | tls_cert_fprt_sha1(void * cert) |
519 | { | |
520 | return fingerprint((X509 *)cert, EVP_sha1()); | |
521 | } | |
522 | ||
94431adb | 523 | uschar * |
9ef9101c JH |
524 | tls_cert_fprt_sha256(void * cert) |
525 | { | |
526 | return fingerprint((X509 *)cert, EVP_sha256()); | |
527 | } | |
528 | ||
6a8a60e0 | 529 | |
9d1c15ef JH |
530 | /* vi: aw ai sw=2 |
531 | */ | |
532 | /* End of tlscert-openssl.c */ |