1 /* crypto/cms/cms_sd.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5 /* ====================================================================
6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 */
53
54 #include "cryptlib.h"
55 #include <openssl/asn1t.h>
56 #include <openssl/pem.h>
57 #include <openssl/x509v3.h>
58 #include <openssl/err.h>
59 #include <openssl/cms.h>
60 #include "cms_lcl.h"
61 #include "asn1_locl.h"
62
63 /* CMS SignedData Utilities */
64
65 DECLARE_ASN1_ITEM(CMS_SignedData)
66
67 static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
68 {
69 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed)
70 {
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
77 static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
78 {
79 if (cms->d.other == NULL)
80 {
81 cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
82 if (!cms->d.signedData)
83 {
84 CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE);
85 return NULL;
86 }
87 cms->d.signedData->version = 1;
88 cms->d.signedData->encapContentInfo->eContentType =
89 OBJ_nid2obj(NID_pkcs7_data);
90 cms->d.signedData->encapContentInfo->partial = 1;
91 ASN1_OBJECT_free(cms->contentType);
92 cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
93 return cms->d.signedData;
94 }
95 return cms_get0_signed(cms);
96 }
97
98 /* Just initialize SignedData e.g. for certs only structure */
99
100 int CMS_SignedData_init(CMS_ContentInfo *cms)
101 {
102 if (cms_signed_data_init(cms))
103 return 1;
104 else
105 return 0;
106 }
107
108 /* Check structures and fixup version numbers (if necessary) */
109
110 static void cms_sd_set_version(CMS_SignedData *sd)
111 {
112 int i;
113 CMS_CertificateChoices *cch;
114 CMS_RevocationInfoChoice *rch;
115 CMS_SignerInfo *si;
116
117 for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++)
118 {
119 cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
120 if (cch->type == CMS_CERTCHOICE_OTHER)
121 {
122 if (sd->version < 5)
123 sd->version = 5;
124 }
125 else if (cch->type == CMS_CERTCHOICE_V2ACERT)
126 {
127 if (sd->version < 4)
128 sd->version = 4;
129 }
130 else if (cch->type == CMS_CERTCHOICE_V1ACERT)
131 {
132 if (sd->version < 3)
133 sd->version = 3;
134 }
135 }
136
137 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++)
138 {
139 rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
140 if (rch->type == CMS_REVCHOICE_OTHER)
141 {
142 if (sd->version < 5)
143 sd->version = 5;
144 }
145 }
146
147 if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
148 && (sd->version < 3))
149 sd->version = 3;
150
151 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
152 {
153 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
154 if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
155 {
156 if (si->version < 3)
157 si->version = 3;
158 if (sd->version < 3)
159 sd->version = 3;
160 }
161 else if (si->version < 1)
162 si->version = 1;
163 }
164
165 if (sd->version < 1)
166 sd->version = 1;
167
168 }
169
170 /* Copy an existing messageDigest value */
171
172 static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
173 {
174 STACK_OF(CMS_SignerInfo) *sinfos;
175 CMS_SignerInfo *sitmp;
176 int i;
177 sinfos = CMS_get0_SignerInfos(cms);
178 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
179 {
180 ASN1_OCTET_STRING *messageDigest;
181 sitmp = sk_CMS_SignerInfo_value(sinfos, i);
182 if (sitmp == si)
183 continue;
184 if (CMS_signed_get_attr_count(sitmp) < 0)
185 continue;
186 if (OBJ_cmp(si->digestAlgorithm->algorithm,
187 sitmp->digestAlgorithm->algorithm))
188 continue;
189 messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
190 OBJ_nid2obj(NID_pkcs9_messageDigest),
191 -3, V_ASN1_OCTET_STRING);
192 if (!messageDigest)
193 {
194 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
195 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
196 return 0;
197 }
198
199 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
200 V_ASN1_OCTET_STRING,
201 messageDigest, -1))
202 return 1;
203 else
204 return 0;
205 }
206 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
207 return 0;
208 }
209
210 int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
211 {
212 switch(type)
213 {
214 case CMS_SIGNERINFO_ISSUER_SERIAL:
215 sid->d.issuerAndSerialNumber =
216 M_ASN1_new_of(CMS_IssuerAndSerialNumber);
217 if (!sid->d.issuerAndSerialNumber)
218 goto merr;
219 if (!X509_NAME_set(&sid->d.issuerAndSerialNumber->issuer,
220 X509_get_issuer_name(cert)))
221 goto merr;
222 if (!ASN1_STRING_copy(
223 sid->d.issuerAndSerialNumber->serialNumber,
224 X509_get_serialNumber(cert)))
225 goto merr;
226 break;
227
228 case CMS_SIGNERINFO_KEYIDENTIFIER:
229 if (!cert->skid)
230 {
231 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER,
232 CMS_R_CERTIFICATE_HAS_NO_KEYID);
233 return 0;
234 }
235 sid->d.subjectKeyIdentifier = ASN1_STRING_dup(cert->skid);
236 if (!sid->d.subjectKeyIdentifier)
237 goto merr;
238 break;
239
240 default:
241 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
242 return 0;
243 }
244
245 sid->type = type;
246
247 return 1;
248
249 merr:
250 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, ERR_R_MALLOC_FAILURE);
251 return 0;
252
253 }
254
255 int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
256 ASN1_OCTET_STRING **keyid,
257 X509_NAME **issuer, ASN1_INTEGER **sno)
258 {
259 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
260 {
261 if (issuer)
262 *issuer = sid->d.issuerAndSerialNumber->issuer;
263 if (sno)
264 *sno = sid->d.issuerAndSerialNumber->serialNumber;
265 }
266 else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
267 {
268 if (keyid)
269 *keyid = sid->d.subjectKeyIdentifier;
270 }
271 else
272 return 0;
273 return 1;
274 }
275
276 int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
277 {
278 int ret;
279 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
280 {
281 ret = X509_NAME_cmp(sid->d.issuerAndSerialNumber->issuer,
282 X509_get_issuer_name(cert));
283 if (ret)
284 return ret;
285 return ASN1_INTEGER_cmp(sid->d.issuerAndSerialNumber->serialNumber,
286 X509_get_serialNumber(cert));
287 }
288 else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
289 {
290 X509_check_purpose(cert, -1, -1);
291 if (!cert->skid)
292 return -1;
293 return ASN1_OCTET_STRING_cmp(sid->d.subjectKeyIdentifier,
294 cert->skid);
295 }
296 else
297 return -1;
298 }
299
300 CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
301 X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
302 unsigned int flags)
303 {
304 CMS_SignedData *sd;
305 CMS_SignerInfo *si = NULL;
306 X509_ALGOR *alg;
307 int i, type;
308 if(!X509_check_private_key(signer, pk))
309 {
310 CMSerr(CMS_F_CMS_ADD1_SIGNER,
311 CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
312 return NULL;
313 }
314 sd = cms_signed_data_init(cms);
315 if (!sd)
316 goto err;
317 si = M_ASN1_new_of(CMS_SignerInfo);
318 if (!si)
319 goto merr;
320 X509_check_purpose(signer, -1, -1);
321
322 CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
323 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
324
325 si->pkey = pk;
326 si->signer = signer;
327
328 if (flags & CMS_USE_KEYID)
329 {
330 si->version = 3;
331 if (sd->version < 3)
332 sd->version = 3;
333 type = CMS_SIGNERINFO_KEYIDENTIFIER;
334 }
335 else
336 {
337 type = CMS_SIGNERINFO_ISSUER_SERIAL;
338 si->version = 1;
339 }
340
341 if (!cms_set1_SignerIdentifier(si->sid, signer, type))
342 goto err;
343
344 if (md == NULL)
345 {
346 int def_nid;
347 if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0)
348 goto err;
349 md = EVP_get_digestbynid(def_nid);
350 if (md == NULL)
351 {
352 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST);
353 goto err;
354 }
355 }
356
357 if (!md)
358 {
359 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET);
360 goto err;
361 }
362
363 cms_DigestAlgorithm_set(si->digestAlgorithm, md);
364
365 /* See if digest is present in digestAlgorithms */
366 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
367 {
368 ASN1_OBJECT *aoid;
369 alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
370 X509_ALGOR_get0(&aoid, NULL, NULL, alg);
371 if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
372 break;
373 }
374
375 if (i == sk_X509_ALGOR_num(sd->digestAlgorithms))
376 {
377 alg = X509_ALGOR_new();
378 if (!alg)
379 goto merr;
380 cms_DigestAlgorithm_set(alg, md);
381 if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg))
382 {
383 X509_ALGOR_free(alg);
384 goto merr;
385 }
386 }
387
388 if (pk->ameth && pk->ameth->pkey_ctrl)
389 {
390 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_SIGN,
391 0, si);
392 if (i == -2)
393 {
394 CMSerr(CMS_F_CMS_ADD1_SIGNER,
395 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
396 goto err;
397 }
398 if (i <= 0)
399 {
400 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_CTRL_FAILURE);
401 goto err;
402 }
403 }
404
405 if (!(flags & CMS_NOATTR))
406 {
407 /* Initialialize signed attributes strutucture so other
408 * attributes such as signing time etc are added later
409 * even if we add none here.
410 */
411 if (!si->signedAttrs)
412 {
413 si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
414 if (!si->signedAttrs)
415 goto merr;
416 }
417
418 if (!(flags & CMS_NOSMIMECAP))
419 {
420 STACK_OF(X509_ALGOR) *smcap = NULL;
421 i = CMS_add_standard_smimecap(&smcap);
422 if (i)
423 i = CMS_add_smimecap(si, smcap);
424 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
425 if (!i)
426 goto merr;
427 }
428 if (flags & CMS_REUSE_DIGEST)
429 {
430 if (!cms_copy_messageDigest(cms, si))
431 goto err;
432 if (!(flags & CMS_PARTIAL) &&
433 !CMS_SignerInfo_sign(si))
434 goto err;
435 }
436 }
437
438 if (!(flags & CMS_NOCERTS))
439 {
440 /* NB ignore -1 return for duplicate cert */
441 if (!CMS_add1_cert(cms, signer))
442 goto merr;
443 }
444
445 if (!sd->signerInfos)
446 sd->signerInfos = sk_CMS_SignerInfo_new_null();
447 if (!sd->signerInfos ||
448 !sk_CMS_SignerInfo_push(sd->signerInfos, si))
449 goto merr;
450
451 return si;
452
453 merr:
454 CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
455 err:
456 if (si)
457 M_ASN1_free_of(si, CMS_SignerInfo);
458 return NULL;
459
460 }
461
462 static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
463 {
464 ASN1_TIME *tt;
465 int r = 0;
466 if (t)
467 tt = t;
468 else
469 tt = X509_gmtime_adj(NULL, 0);
470
471 if (!tt)
472 goto merr;
473
474 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
475 tt->type, tt, -1) <= 0)
476 goto merr;
477
478 r = 1;
479
480 merr:
481
482 if (!t)
483 ASN1_TIME_free(tt);
484
485 if (!r)
486 CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
487
488 return r;
489
490 }
491
492 STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
493 {
494 CMS_SignedData *sd;
495 sd = cms_get0_signed(cms);
496 if (!sd)
497 return NULL;
498 return sd->signerInfos;
499 }
500
501 STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
502 {
503 STACK_OF(X509) *signers = NULL;
504 STACK_OF(CMS_SignerInfo) *sinfos;
505 CMS_SignerInfo *si;
506 int i;
507 sinfos = CMS_get0_SignerInfos(cms);
508 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
509 {
510 si = sk_CMS_SignerInfo_value(sinfos, i);
511 if (si->signer)
512 {
513 if (!signers)
514 {
515 signers = sk_X509_new_null();
516 if (!signers)
517 return NULL;
518 }
519 if (!sk_X509_push(signers, si->signer))
520 {
521 sk_X509_free(signers);
522 return NULL;
523 }
524 }
525 }
526 return signers;
527 }
528
529 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
530 {
531 if (signer)
532 {
533 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
534 if (si->pkey)
535 EVP_PKEY_free(si->pkey);
536 si->pkey = X509_get_pubkey(signer);
537 }
538 if (si->signer)
539 X509_free(si->signer);
540 si->signer = signer;
541 }
542
543 int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
544 ASN1_OCTET_STRING **keyid,
545 X509_NAME **issuer, ASN1_INTEGER **sno)
546 {
547 return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
548 }
549
550 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
551 {
552 return cms_SignerIdentifier_cert_cmp(si->sid, cert);
553 }
554
555 int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
556 unsigned int flags)
557 {
558 CMS_SignedData *sd;
559 CMS_SignerInfo *si;
560 CMS_CertificateChoices *cch;
561 STACK_OF(CMS_CertificateChoices) *certs;
562 X509 *x;
563 int i, j;
564 int ret = 0;
565 sd = cms_get0_signed(cms);
566 if (!sd)
567 return -1;
568 certs = sd->certificates;
569 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
570 {
571 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
572 if (si->signer)
573 continue;
574
575 for (j = 0; j < sk_X509_num(scerts); j++)
576 {
577 x = sk_X509_value(scerts, j);
578 if (CMS_SignerInfo_cert_cmp(si, x) == 0)
579 {
580 CMS_SignerInfo_set1_signer_cert(si, x);
581 ret++;
582 break;
583 }
584 }
585
586 if (si->signer || (flags & CMS_NOINTERN))
587 continue;
588
589 for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++)
590 {
591 cch = sk_CMS_CertificateChoices_value(certs, j);
592 if (cch->type != 0)
593 continue;
594 x = cch->d.certificate;
595 if (CMS_SignerInfo_cert_cmp(si, x) == 0)
596 {
597 CMS_SignerInfo_set1_signer_cert(si, x);
598 ret++;
599 break;
600 }
601 }
602 }
603 return ret;
604 }
605
606 void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk, X509 **signer,
607 X509_ALGOR **pdig, X509_ALGOR **psig)
608 {
609 if (pk)
610 *pk = si->pkey;
611 if (signer)
612 *signer = si->signer;
613 if (pdig)
614 *pdig = si->digestAlgorithm;
615 if (psig)
616 *psig = si->signatureAlgorithm;
617 }
618
619 static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
620 CMS_SignerInfo *si, BIO *chain)
621 {
622 EVP_MD_CTX mctx;
623 int r = 0;
624 EVP_MD_CTX_init(&mctx);
625
626
627 if (!si->pkey)
628 {
629 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
630 return 0;
631 }
632
633 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
634 goto err;
635
636 /* If any signed attributes calculate and add messageDigest attribute */
637
638 if (CMS_signed_get_attr_count(si) >= 0)
639 {
640 ASN1_OBJECT *ctype =
641 cms->d.signedData->encapContentInfo->eContentType;
642 unsigned char md[EVP_MAX_MD_SIZE];
643 unsigned int mdlen;
644 if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
645 goto err;
646 if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
647 V_ASN1_OCTET_STRING,
648 md, mdlen))
649 goto err;
650 /* Copy content type across */
651 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
652 V_ASN1_OBJECT, ctype, -1) <= 0)
653 goto err;
654 if (!CMS_SignerInfo_sign(si))
655 goto err;
656 }
657 else
658 {
659 unsigned char *sig;
660 unsigned int siglen;
661 sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
662 if (!sig)
663 {
664 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
665 ERR_R_MALLOC_FAILURE);
666 goto err;
667 }
668 if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey))
669 {
670 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
671 CMS_R_SIGNFINAL_ERROR);
672 OPENSSL_free(sig);
673 goto err;
674 }
675 ASN1_STRING_set0(si->signature, sig, siglen);
676 }
677
678 r = 1;
679
680 err:
681 EVP_MD_CTX_cleanup(&mctx);
682 return r;
683
684 }
685
686 int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
687 {
688 STACK_OF(CMS_SignerInfo) *sinfos;
689 CMS_SignerInfo *si;
690 int i;
691 sinfos = CMS_get0_SignerInfos(cms);
692 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
693 {
694 si = sk_CMS_SignerInfo_value(sinfos, i);
695 if (!cms_SignerInfo_content_sign(cms, si, chain))
696 return 0;
697 }
698 cms->d.signedData->encapContentInfo->partial = 0;
699 return 1;
700 }
701
702 int CMS_SignerInfo_sign(CMS_SignerInfo *si)
703 {
704 EVP_MD_CTX mctx;
705 EVP_PKEY_CTX *pctx;
706 unsigned char *abuf = NULL;
707 int alen;
708 size_t siglen;
709 const EVP_MD *md = NULL;
710
711 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
712 if (md == NULL)
713 return 0;
714
715 EVP_MD_CTX_init(&mctx);
716
717 if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0)
718 {
719 if (!cms_add1_signingTime(si, NULL))
720 goto err;
721 }
722
723 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
724 goto err;
725
726 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
727 EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0)
728 {
729 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
730 goto err;
731 }
732
733 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
734 ASN1_ITEM_rptr(CMS_Attributes_Sign));
735 if(!abuf)
736 goto err;
737 if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
738 goto err;
739 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
740 goto err;
741 OPENSSL_free(abuf);
742 abuf = OPENSSL_malloc(siglen);
743 if(!abuf)
744 goto err;
745 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
746 goto err;
747
748 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
749 EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0)
750 {
751 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
752 goto err;
753 }
754
755 EVP_MD_CTX_cleanup(&mctx);
756
757 ASN1_STRING_set0(si->signature, abuf, siglen);
758
759 return 1;
760
761 err:
762 if (abuf)
763 OPENSSL_free(abuf);
764 EVP_MD_CTX_cleanup(&mctx);
765 return 0;
766
767 }
768
769 int CMS_SignerInfo_verify(CMS_SignerInfo *si)
770 {
771 EVP_MD_CTX mctx;
772 EVP_PKEY_CTX *pctx;
773 unsigned char *abuf = NULL;
774 int alen, r = -1;
775 const EVP_MD *md = NULL;
776
777 if (!si->pkey)
778 {
779 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
780 return -1;
781 }
782
783 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
784 if (md == NULL)
785 return -1;
786 EVP_MD_CTX_init(&mctx);
787 if (EVP_DigestVerifyInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
788 goto err;
789
790 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
791 ASN1_ITEM_rptr(CMS_Attributes_Verify));
792 if(!abuf)
793 goto err;
794 r = EVP_DigestVerifyUpdate(&mctx, abuf, alen);
795 OPENSSL_free(abuf);
796 if (r <= 0)
797 {
798 r = -1;
799 goto err;
800 }
801 r = EVP_DigestVerifyFinal(&mctx,
802 si->signature->data, si->signature->length);
803 if (r <= 0)
804 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
805 err:
806 EVP_MD_CTX_cleanup(&mctx);
807 return r;
808 }
809
810 /* Create a chain of digest BIOs from a CMS ContentInfo */
811
812 BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
813 {
814 int i;
815 CMS_SignedData *sd;
816 BIO *chain = NULL;
817 sd = cms_get0_signed(cms);
818 if (!sd)
819 return NULL;
820 if (cms->d.signedData->encapContentInfo->partial)
821 cms_sd_set_version(sd);
822 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
823 {
824 X509_ALGOR *digestAlgorithm;
825 BIO *mdbio;
826 digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
827 mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
828 if (!mdbio)
829 goto err;
830 if (chain)
831 BIO_push(chain, mdbio);
832 else
833 chain = mdbio;
834 }
835 return chain;
836 err:
837 if (chain)
838 BIO_free_all(chain);
839 return NULL;
840 }
841
842 int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
843 {
844 ASN1_OCTET_STRING *os = NULL;
845 EVP_MD_CTX mctx;
846 int r = -1;
847 EVP_MD_CTX_init(&mctx);
848 /* If we have any signed attributes look for messageDigest value */
849 if (CMS_signed_get_attr_count(si) >= 0)
850 {
851 os = CMS_signed_get0_data_by_OBJ(si,
852 OBJ_nid2obj(NID_pkcs9_messageDigest),
853 -3, V_ASN1_OCTET_STRING);
854 if (!os)
855 {
856 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
857 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
858 goto err;
859 }
860 }
861
862 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
863 goto err;
864
865 /* If messageDigest found compare it */
866
867 if (os)
868 {
869 unsigned char mval[EVP_MAX_MD_SIZE];
870 unsigned int mlen;
871 if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0)
872 {
873 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
874 CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
875 goto err;
876 }
877 if (mlen != (unsigned int)os->length)
878 {
879 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
880 CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
881 goto err;
882 }
883
884 if (memcmp(mval, os->data, mlen))
885 {
886 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
887 CMS_R_VERIFICATION_FAILURE);
888 r = 0;
889 }
890 else
891 r = 1;
892 }
893 else
894 {
895 r = EVP_VerifyFinal(&mctx, si->signature->data,
896 si->signature->length, si->pkey);
897 if (r <= 0)
898 {
899 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
900 CMS_R_VERIFICATION_FAILURE);
901 r = 0;
902 }
903 }
904
905 err:
906 EVP_MD_CTX_cleanup(&mctx);
907 return r;
908
909 }
910
911 int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
912 {
913 unsigned char *smder = NULL;
914 int smderlen, r;
915 smderlen = i2d_X509_ALGORS(algs, &smder);
916 if (smderlen <= 0)
917 return 0;
918 r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
919 V_ASN1_SEQUENCE, smder, smderlen);
920 OPENSSL_free(smder);
921 return r;
922 }
923
924 int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
925 int algnid, int keysize)
926 {
927 X509_ALGOR *alg;
928 ASN1_INTEGER *key = NULL;
929 if (keysize > 0)
930 {
931 key = ASN1_INTEGER_new();
932 if (!key || !ASN1_INTEGER_set(key, keysize))
933 return 0;
934 }
935 alg = X509_ALGOR_new();
936 if (!alg)
937 {
938 if (key)
939 ASN1_INTEGER_free(key);
940 return 0;
941 }
942
943 X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
944 key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
945 if (!*algs)
946 *algs = sk_X509_ALGOR_new_null();
947 if (!*algs || !sk_X509_ALGOR_push(*algs, alg))
948 {
949 X509_ALGOR_free(alg);
950 return 0;
951 }
952 return 1;
953 }
954
955 /* Check to see if a cipher exists and if so add S/MIME capabilities */
956
957 static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
958 {
959 if (EVP_get_cipherbynid(nid))
960 return CMS_add_simple_smimecap(sk, nid, arg);
961 return 1;
962 }
963
964 static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
965 {
966 if (EVP_get_digestbynid(nid))
967 return CMS_add_simple_smimecap(sk, nid, arg);
968 return 1;
969 }
970
971 int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
972 {
973 if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
974 || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
975 || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
976 || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
977 || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
978 || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
979 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
980 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
981 || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
982 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
983 return 0;
984 return 1;
985 }