1 /* crypto/cms/cms_sd.c */
2 /*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 * project.
5 */
6 /* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 */
54
55 #include "cryptlib.h"
56 #include <openssl/asn1t.h>
57 #include <openssl/pem.h>
58 #include <openssl/x509v3.h>
59 #include <openssl/err.h>
60 #include <openssl/cms.h>
61 #include "cms_lcl.h"
62 #include "asn1_locl.h"
63
64 /* CMS SignedData Utilities */
65
DECLARE_ASN1_ITEM(CMS_SignedData)66 DECLARE_ASN1_ITEM(CMS_SignedData)
67
68 static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
69 {
70 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) {
71 CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
72 return NULL;
73 }
74 return cms->d.signedData;
75 }
76
cms_signed_data_init(CMS_ContentInfo * cms)77 static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
78 {
79 if (cms->d.other == NULL) {
80 cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
81 if (!cms->d.signedData) {
82 CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE);
83 return NULL;
84 }
85 cms->d.signedData->version = 1;
86 cms->d.signedData->encapContentInfo->eContentType =
87 OBJ_nid2obj(NID_pkcs7_data);
88 cms->d.signedData->encapContentInfo->partial = 1;
89 ASN1_OBJECT_free(cms->contentType);
90 cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
91 return cms->d.signedData;
92 }
93 return cms_get0_signed(cms);
94 }
95
96 /* Just initialize SignedData e.g. for certs only structure */
97
CMS_SignedData_init(CMS_ContentInfo * cms)98 int CMS_SignedData_init(CMS_ContentInfo *cms)
99 {
100 if (cms_signed_data_init(cms))
101 return 1;
102 else
103 return 0;
104 }
105
106 /* Check structures and fixup version numbers (if necessary) */
107
cms_sd_set_version(CMS_SignedData * sd)108 static void cms_sd_set_version(CMS_SignedData *sd)
109 {
110 int i;
111 CMS_CertificateChoices *cch;
112 CMS_RevocationInfoChoice *rch;
113 CMS_SignerInfo *si;
114
115 for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) {
116 cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
117 if (cch->type == CMS_CERTCHOICE_OTHER) {
118 if (sd->version < 5)
119 sd->version = 5;
120 } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
121 if (sd->version < 4)
122 sd->version = 4;
123 } else if (cch->type == CMS_CERTCHOICE_V1ACERT) {
124 if (sd->version < 3)
125 sd->version = 3;
126 }
127 }
128
129 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) {
130 rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
131 if (rch->type == CMS_REVCHOICE_OTHER) {
132 if (sd->version < 5)
133 sd->version = 5;
134 }
135 }
136
137 if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
138 && (sd->version < 3))
139 sd->version = 3;
140
141 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
142 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
143 if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
144 if (si->version < 3)
145 si->version = 3;
146 if (sd->version < 3)
147 sd->version = 3;
148 } else if (si->version < 1)
149 si->version = 1;
150 }
151
152 if (sd->version < 1)
153 sd->version = 1;
154
155 }
156
157 /* Copy an existing messageDigest value */
158
cms_copy_messageDigest(CMS_ContentInfo * cms,CMS_SignerInfo * si)159 static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
160 {
161 STACK_OF(CMS_SignerInfo) *sinfos;
162 CMS_SignerInfo *sitmp;
163 int i;
164 sinfos = CMS_get0_SignerInfos(cms);
165 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
166 ASN1_OCTET_STRING *messageDigest;
167 sitmp = sk_CMS_SignerInfo_value(sinfos, i);
168 if (sitmp == si)
169 continue;
170 if (CMS_signed_get_attr_count(sitmp) < 0)
171 continue;
172 if (OBJ_cmp(si->digestAlgorithm->algorithm,
173 sitmp->digestAlgorithm->algorithm))
174 continue;
175 messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
176 OBJ_nid2obj
177 (NID_pkcs9_messageDigest),
178 -3, V_ASN1_OCTET_STRING);
179 if (!messageDigest) {
180 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
181 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
182 return 0;
183 }
184
185 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
186 V_ASN1_OCTET_STRING,
187 messageDigest, -1))
188 return 1;
189 else
190 return 0;
191 }
192 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
193 return 0;
194 }
195
cms_set1_SignerIdentifier(CMS_SignerIdentifier * sid,X509 * cert,int type)196 int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
197 {
198 switch (type) {
199 case CMS_SIGNERINFO_ISSUER_SERIAL:
200 sid->d.issuerAndSerialNumber =
201 M_ASN1_new_of(CMS_IssuerAndSerialNumber);
202 if (!sid->d.issuerAndSerialNumber)
203 goto merr;
204 if (!X509_NAME_set(&sid->d.issuerAndSerialNumber->issuer,
205 X509_get_issuer_name(cert)))
206 goto merr;
207 if (!ASN1_STRING_copy(sid->d.issuerAndSerialNumber->serialNumber,
208 X509_get_serialNumber(cert)))
209 goto merr;
210 break;
211
212 case CMS_SIGNERINFO_KEYIDENTIFIER:
213 if (!cert->skid) {
214 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER,
215 CMS_R_CERTIFICATE_HAS_NO_KEYID);
216 return 0;
217 }
218 sid->d.subjectKeyIdentifier = ASN1_STRING_dup(cert->skid);
219 if (!sid->d.subjectKeyIdentifier)
220 goto merr;
221 break;
222
223 default:
224 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
225 return 0;
226 }
227
228 sid->type = type;
229
230 return 1;
231
232 merr:
233 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, ERR_R_MALLOC_FAILURE);
234 return 0;
235
236 }
237
cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier * sid,ASN1_OCTET_STRING ** keyid,X509_NAME ** issuer,ASN1_INTEGER ** sno)238 int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
239 ASN1_OCTET_STRING **keyid,
240 X509_NAME **issuer,
241 ASN1_INTEGER **sno)
242 {
243 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) {
244 if (issuer)
245 *issuer = sid->d.issuerAndSerialNumber->issuer;
246 if (sno)
247 *sno = sid->d.issuerAndSerialNumber->serialNumber;
248 } else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
249 if (keyid)
250 *keyid = sid->d.subjectKeyIdentifier;
251 } else
252 return 0;
253 return 1;
254 }
255
cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier * sid,X509 * cert)256 int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
257 {
258 int ret;
259 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) {
260 ret = X509_NAME_cmp(sid->d.issuerAndSerialNumber->issuer,
261 X509_get_issuer_name(cert));
262 if (ret)
263 return ret;
264 return ASN1_INTEGER_cmp(sid->d.issuerAndSerialNumber->serialNumber,
265 X509_get_serialNumber(cert));
266 } else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
267 X509_check_purpose(cert, -1, -1);
268 if (!cert->skid)
269 return -1;
270 return ASN1_OCTET_STRING_cmp(sid->d.subjectKeyIdentifier, cert->skid);
271 } else
272 return -1;
273 }
274
CMS_add1_signer(CMS_ContentInfo * cms,X509 * signer,EVP_PKEY * pk,const EVP_MD * md,unsigned int flags)275 CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
276 X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
277 unsigned int flags)
278 {
279 CMS_SignedData *sd;
280 CMS_SignerInfo *si = NULL;
281 X509_ALGOR *alg;
282 int i, type;
283 if (!X509_check_private_key(signer, pk)) {
284 CMSerr(CMS_F_CMS_ADD1_SIGNER,
285 CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
286 return NULL;
287 }
288 sd = cms_signed_data_init(cms);
289 if (!sd)
290 goto err;
291 si = M_ASN1_new_of(CMS_SignerInfo);
292 if (!si)
293 goto merr;
294 X509_check_purpose(signer, -1, -1);
295
296 CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
297 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
298
299 si->pkey = pk;
300 si->signer = signer;
301
302 if (flags & CMS_USE_KEYID) {
303 si->version = 3;
304 if (sd->version < 3)
305 sd->version = 3;
306 type = CMS_SIGNERINFO_KEYIDENTIFIER;
307 } else {
308 type = CMS_SIGNERINFO_ISSUER_SERIAL;
309 si->version = 1;
310 }
311
312 if (!cms_set1_SignerIdentifier(si->sid, signer, type))
313 goto err;
314
315 if (md == NULL) {
316 int def_nid;
317 if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0)
318 goto err;
319 md = EVP_get_digestbynid(def_nid);
320 if (md == NULL) {
321 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST);
322 goto err;
323 }
324 }
325
326 if (!md) {
327 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET);
328 goto err;
329 }
330
331 cms_DigestAlgorithm_set(si->digestAlgorithm, md);
332
333 /* See if digest is present in digestAlgorithms */
334 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
335 ASN1_OBJECT *aoid;
336 alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
337 X509_ALGOR_get0(&aoid, NULL, NULL, alg);
338 if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
339 break;
340 }
341
342 if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) {
343 alg = X509_ALGOR_new();
344 if (!alg)
345 goto merr;
346 cms_DigestAlgorithm_set(alg, md);
347 if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) {
348 X509_ALGOR_free(alg);
349 goto merr;
350 }
351 }
352
353 if (pk->ameth && pk->ameth->pkey_ctrl) {
354 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_SIGN, 0, si);
355 if (i == -2) {
356 CMSerr(CMS_F_CMS_ADD1_SIGNER,
357 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
358 goto err;
359 }
360 if (i <= 0) {
361 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_CTRL_FAILURE);
362 goto err;
363 }
364 }
365
366 if (!(flags & CMS_NOATTR)) {
367 /*
368 * Initialialize signed attributes strutucture so other attributes
369 * such as signing time etc are added later even if we add none here.
370 */
371 if (!si->signedAttrs) {
372 si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
373 if (!si->signedAttrs)
374 goto merr;
375 }
376
377 if (!(flags & CMS_NOSMIMECAP)) {
378 STACK_OF(X509_ALGOR) *smcap = NULL;
379 i = CMS_add_standard_smimecap(&smcap);
380 if (i)
381 i = CMS_add_smimecap(si, smcap);
382 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
383 if (!i)
384 goto merr;
385 }
386 if (flags & CMS_REUSE_DIGEST) {
387 if (!cms_copy_messageDigest(cms, si))
388 goto err;
389 if (!(flags & CMS_PARTIAL) && !CMS_SignerInfo_sign(si))
390 goto err;
391 }
392 }
393
394 if (!(flags & CMS_NOCERTS)) {
395 /* NB ignore -1 return for duplicate cert */
396 if (!CMS_add1_cert(cms, signer))
397 goto merr;
398 }
399
400 if (!sd->signerInfos)
401 sd->signerInfos = sk_CMS_SignerInfo_new_null();
402 if (!sd->signerInfos || !sk_CMS_SignerInfo_push(sd->signerInfos, si))
403 goto merr;
404
405 return si;
406
407 merr:
408 CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
409 err:
410 if (si)
411 M_ASN1_free_of(si, CMS_SignerInfo);
412 return NULL;
413
414 }
415
cms_add1_signingTime(CMS_SignerInfo * si,ASN1_TIME * t)416 static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
417 {
418 ASN1_TIME *tt;
419 int r = 0;
420 if (t)
421 tt = t;
422 else
423 tt = X509_gmtime_adj(NULL, 0);
424
425 if (!tt)
426 goto merr;
427
428 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
429 tt->type, tt, -1) <= 0)
430 goto merr;
431
432 r = 1;
433
434 merr:
435
436 if (!t)
437 ASN1_TIME_free(tt);
438
439 if (!r)
440 CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
441
442 return r;
443
444 }
445
STACK_OF(CMS_SignerInfo)446 STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
447 {
448 CMS_SignedData *sd;
449 sd = cms_get0_signed(cms);
450 if (!sd)
451 return NULL;
452 return sd->signerInfos;
453 }
454
STACK_OF(X509)455 STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
456 {
457 STACK_OF(X509) *signers = NULL;
458 STACK_OF(CMS_SignerInfo) *sinfos;
459 CMS_SignerInfo *si;
460 int i;
461 sinfos = CMS_get0_SignerInfos(cms);
462 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
463 si = sk_CMS_SignerInfo_value(sinfos, i);
464 if (si->signer) {
465 if (!signers) {
466 signers = sk_X509_new_null();
467 if (!signers)
468 return NULL;
469 }
470 if (!sk_X509_push(signers, si->signer)) {
471 sk_X509_free(signers);
472 return NULL;
473 }
474 }
475 }
476 return signers;
477 }
478
CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo * si,X509 * signer)479 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
480 {
481 if (signer) {
482 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
483 if (si->pkey)
484 EVP_PKEY_free(si->pkey);
485 si->pkey = X509_get_pubkey(signer);
486 }
487 if (si->signer)
488 X509_free(si->signer);
489 si->signer = signer;
490 }
491
CMS_SignerInfo_get0_signer_id(CMS_SignerInfo * si,ASN1_OCTET_STRING ** keyid,X509_NAME ** issuer,ASN1_INTEGER ** sno)492 int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
493 ASN1_OCTET_STRING **keyid,
494 X509_NAME **issuer, ASN1_INTEGER **sno)
495 {
496 return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
497 }
498
CMS_SignerInfo_cert_cmp(CMS_SignerInfo * si,X509 * cert)499 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
500 {
501 return cms_SignerIdentifier_cert_cmp(si->sid, cert);
502 }
503
CMS_set1_signers_certs(CMS_ContentInfo * cms,STACK_OF (X509)* scerts,unsigned int flags)504 int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
505 unsigned int flags)
506 {
507 CMS_SignedData *sd;
508 CMS_SignerInfo *si;
509 CMS_CertificateChoices *cch;
510 STACK_OF(CMS_CertificateChoices) *certs;
511 X509 *x;
512 int i, j;
513 int ret = 0;
514 sd = cms_get0_signed(cms);
515 if (!sd)
516 return -1;
517 certs = sd->certificates;
518 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
519 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
520 if (si->signer)
521 continue;
522
523 for (j = 0; j < sk_X509_num(scerts); j++) {
524 x = sk_X509_value(scerts, j);
525 if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
526 CMS_SignerInfo_set1_signer_cert(si, x);
527 ret++;
528 break;
529 }
530 }
531
532 if (si->signer || (flags & CMS_NOINTERN))
533 continue;
534
535 for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) {
536 cch = sk_CMS_CertificateChoices_value(certs, j);
537 if (cch->type != 0)
538 continue;
539 x = cch->d.certificate;
540 if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
541 CMS_SignerInfo_set1_signer_cert(si, x);
542 ret++;
543 break;
544 }
545 }
546 }
547 return ret;
548 }
549
CMS_SignerInfo_get0_algs(CMS_SignerInfo * si,EVP_PKEY ** pk,X509 ** signer,X509_ALGOR ** pdig,X509_ALGOR ** psig)550 void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk,
551 X509 **signer, X509_ALGOR **pdig,
552 X509_ALGOR **psig)
553 {
554 if (pk)
555 *pk = si->pkey;
556 if (signer)
557 *signer = si->signer;
558 if (pdig)
559 *pdig = si->digestAlgorithm;
560 if (psig)
561 *psig = si->signatureAlgorithm;
562 }
563
cms_SignerInfo_content_sign(CMS_ContentInfo * cms,CMS_SignerInfo * si,BIO * chain)564 static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
565 CMS_SignerInfo *si, BIO *chain)
566 {
567 EVP_MD_CTX mctx;
568 int r = 0;
569 EVP_MD_CTX_init(&mctx);
570
571 if (!si->pkey) {
572 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
573 return 0;
574 }
575
576 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
577 goto err;
578
579 /*
580 * If any signed attributes calculate and add messageDigest attribute
581 */
582
583 if (CMS_signed_get_attr_count(si) >= 0) {
584 ASN1_OBJECT *ctype =
585 cms->d.signedData->encapContentInfo->eContentType;
586 unsigned char md[EVP_MAX_MD_SIZE];
587 unsigned int mdlen;
588 if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
589 goto err;
590 if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
591 V_ASN1_OCTET_STRING, md, mdlen))
592 goto err;
593 /* Copy content type across */
594 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
595 V_ASN1_OBJECT, ctype, -1) <= 0)
596 goto err;
597 if (!CMS_SignerInfo_sign(si))
598 goto err;
599 } else {
600 unsigned char *sig;
601 unsigned int siglen;
602 sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
603 if (!sig) {
604 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
605 goto err;
606 }
607 if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey)) {
608 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_SIGNFINAL_ERROR);
609 OPENSSL_free(sig);
610 goto err;
611 }
612 ASN1_STRING_set0(si->signature, sig, siglen);
613 }
614
615 r = 1;
616
617 err:
618 EVP_MD_CTX_cleanup(&mctx);
619 return r;
620
621 }
622
cms_SignedData_final(CMS_ContentInfo * cms,BIO * chain)623 int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
624 {
625 STACK_OF(CMS_SignerInfo) *sinfos;
626 CMS_SignerInfo *si;
627 int i;
628 sinfos = CMS_get0_SignerInfos(cms);
629 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
630 si = sk_CMS_SignerInfo_value(sinfos, i);
631 if (!cms_SignerInfo_content_sign(cms, si, chain))
632 return 0;
633 }
634 cms->d.signedData->encapContentInfo->partial = 0;
635 return 1;
636 }
637
CMS_SignerInfo_sign(CMS_SignerInfo * si)638 int CMS_SignerInfo_sign(CMS_SignerInfo *si)
639 {
640 EVP_MD_CTX mctx;
641 EVP_PKEY_CTX *pctx;
642 unsigned char *abuf = NULL;
643 int alen;
644 size_t siglen;
645 const EVP_MD *md = NULL;
646
647 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
648 if (md == NULL)
649 return 0;
650
651 EVP_MD_CTX_init(&mctx);
652
653 if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) {
654 if (!cms_add1_signingTime(si, NULL))
655 goto err;
656 }
657
658 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
659 goto err;
660
661 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
662 EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0) {
663 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
664 goto err;
665 }
666
667 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
668 ASN1_ITEM_rptr(CMS_Attributes_Sign));
669 if (!abuf)
670 goto err;
671 if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
672 goto err;
673 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
674 goto err;
675 OPENSSL_free(abuf);
676 abuf = OPENSSL_malloc(siglen);
677 if (!abuf)
678 goto err;
679 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
680 goto err;
681
682 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
683 EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0) {
684 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
685 goto err;
686 }
687
688 EVP_MD_CTX_cleanup(&mctx);
689
690 ASN1_STRING_set0(si->signature, abuf, siglen);
691
692 return 1;
693
694 err:
695 if (abuf)
696 OPENSSL_free(abuf);
697 EVP_MD_CTX_cleanup(&mctx);
698 return 0;
699
700 }
701
CMS_SignerInfo_verify(CMS_SignerInfo * si)702 int CMS_SignerInfo_verify(CMS_SignerInfo *si)
703 {
704 EVP_MD_CTX mctx;
705 EVP_PKEY_CTX *pctx;
706 unsigned char *abuf = NULL;
707 int alen, r = -1;
708 const EVP_MD *md = NULL;
709
710 if (!si->pkey) {
711 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
712 return -1;
713 }
714
715 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
716 if (md == NULL)
717 return -1;
718 EVP_MD_CTX_init(&mctx);
719 if (EVP_DigestVerifyInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
720 goto err;
721
722 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
723 ASN1_ITEM_rptr(CMS_Attributes_Verify));
724 if (!abuf)
725 goto err;
726 r = EVP_DigestVerifyUpdate(&mctx, abuf, alen);
727 OPENSSL_free(abuf);
728 if (r <= 0) {
729 r = -1;
730 goto err;
731 }
732 r = EVP_DigestVerifyFinal(&mctx,
733 si->signature->data, si->signature->length);
734 if (r <= 0)
735 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
736 err:
737 EVP_MD_CTX_cleanup(&mctx);
738 return r;
739 }
740
741 /* Create a chain of digest BIOs from a CMS ContentInfo */
742
cms_SignedData_init_bio(CMS_ContentInfo * cms)743 BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
744 {
745 int i;
746 CMS_SignedData *sd;
747 BIO *chain = NULL;
748 sd = cms_get0_signed(cms);
749 if (!sd)
750 return NULL;
751 if (cms->d.signedData->encapContentInfo->partial)
752 cms_sd_set_version(sd);
753 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
754 X509_ALGOR *digestAlgorithm;
755 BIO *mdbio;
756 digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
757 mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
758 if (!mdbio)
759 goto err;
760 if (chain)
761 BIO_push(chain, mdbio);
762 else
763 chain = mdbio;
764 }
765 return chain;
766 err:
767 if (chain)
768 BIO_free_all(chain);
769 return NULL;
770 }
771
CMS_SignerInfo_verify_content(CMS_SignerInfo * si,BIO * chain)772 int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
773 {
774 ASN1_OCTET_STRING *os = NULL;
775 EVP_MD_CTX mctx;
776 int r = -1;
777 EVP_MD_CTX_init(&mctx);
778 /* If we have any signed attributes look for messageDigest value */
779 if (CMS_signed_get_attr_count(si) >= 0) {
780 os = CMS_signed_get0_data_by_OBJ(si,
781 OBJ_nid2obj(NID_pkcs9_messageDigest),
782 -3, V_ASN1_OCTET_STRING);
783 if (!os) {
784 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
785 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
786 goto err;
787 }
788 }
789
790 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
791 goto err;
792
793 /* If messageDigest found compare it */
794
795 if (os) {
796 unsigned char mval[EVP_MAX_MD_SIZE];
797 unsigned int mlen;
798 if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0) {
799 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
800 CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
801 goto err;
802 }
803 if (mlen != (unsigned int)os->length) {
804 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
805 CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
806 goto err;
807 }
808
809 if (memcmp(mval, os->data, mlen)) {
810 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
811 CMS_R_VERIFICATION_FAILURE);
812 r = 0;
813 } else
814 r = 1;
815 } else {
816 r = EVP_VerifyFinal(&mctx, si->signature->data,
817 si->signature->length, si->pkey);
818 if (r <= 0) {
819 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
820 CMS_R_VERIFICATION_FAILURE);
821 r = 0;
822 }
823 }
824
825 err:
826 EVP_MD_CTX_cleanup(&mctx);
827 return r;
828
829 }
830
CMS_add_smimecap(CMS_SignerInfo * si,STACK_OF (X509_ALGOR)* algs)831 int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
832 {
833 unsigned char *smder = NULL;
834 int smderlen, r;
835 smderlen = i2d_X509_ALGORS(algs, &smder);
836 if (smderlen <= 0)
837 return 0;
838 r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
839 V_ASN1_SEQUENCE, smder, smderlen);
840 OPENSSL_free(smder);
841 return r;
842 }
843
CMS_add_simple_smimecap(STACK_OF (X509_ALGOR)** algs,int algnid,int keysize)844 int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
845 int algnid, int keysize)
846 {
847 X509_ALGOR *alg;
848 ASN1_INTEGER *key = NULL;
849 if (keysize > 0) {
850 key = ASN1_INTEGER_new();
851 if (!key || !ASN1_INTEGER_set(key, keysize))
852 return 0;
853 }
854 alg = X509_ALGOR_new();
855 if (!alg) {
856 if (key)
857 ASN1_INTEGER_free(key);
858 return 0;
859 }
860
861 X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
862 key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
863 if (!*algs)
864 *algs = sk_X509_ALGOR_new_null();
865 if (!*algs || !sk_X509_ALGOR_push(*algs, alg)) {
866 X509_ALGOR_free(alg);
867 return 0;
868 }
869 return 1;
870 }
871
872 /* Check to see if a cipher exists and if so add S/MIME capabilities */
873
cms_add_cipher_smcap(STACK_OF (X509_ALGOR)** sk,int nid,int arg)874 static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
875 {
876 if (EVP_get_cipherbynid(nid))
877 return CMS_add_simple_smimecap(sk, nid, arg);
878 return 1;
879 }
880
cms_add_digest_smcap(STACK_OF (X509_ALGOR)** sk,int nid,int arg)881 static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
882 {
883 if (EVP_get_digestbynid(nid))
884 return CMS_add_simple_smimecap(sk, nid, arg);
885 return 1;
886 }
887
CMS_add_standard_smimecap(STACK_OF (X509_ALGOR)** smcap)888 int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
889 {
890 if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
891 || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
892 || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
893 || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
894 || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
895 || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
896 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
897 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
898 || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
899 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
900 return 0;
901 return 1;
902 }
903