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CMS public key parameter support.
[thirdparty/openssl.git] / crypto / cms / cms_sd.c
CommitLineData
8931b30d
DSH		 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
65DECLARE_ASN1_ITEM(CMS_SignedData)
66
67static 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
77static 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);
761ffa72 90 cms->d.signedData->encapContentInfo->partial = 1;
8931b30d
DSH		 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
100int 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
110static 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
162 sd->version = 1;
163 }
164
165 if (sd->version < 1)
166 sd->version = 1;
167
168 }
169
170/* Copy an existing messageDigest value */
171
172static 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
210int 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:
054307e7
DSH		 229 if (!cert->skid)
230 {
231 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER,
232 CMS_R_CERTIFICATE_HAS_NO_KEYID);
233 return 0;
234 }
8931b30d
DSH		 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
255int 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
276int 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
e365352d
DSH		 300static int cms_sd_asn1_ctrl(CMS_SignerInfo *si, int cmd)
301 {
302 EVP_PKEY *pkey = si->pkey;
303 int i;
304 if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
305 return 1;
306 i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_SIGN, cmd, si);
307 if (i == -2)
308 {
309 CMSerr(CMS_F_CMS_SD_ASN1_CTRL,
310 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
311 return 0;
312 }
313 if (i <= 0)
314 {
315 CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_CTRL_FAILURE);
316 return 0;
317 }
318 return 1;
319 }
320
8931b30d
DSH		 321CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
322 X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
323 unsigned int flags)
324 {
325 CMS_SignedData *sd;
326 CMS_SignerInfo *si = NULL;
327 X509_ALGOR *alg;
328 int i, type;
329 if(!X509_check_private_key(signer, pk))
330 {
331 CMSerr(CMS_F_CMS_ADD1_SIGNER,
332 CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
333 return NULL;
334 }
335 sd = cms_signed_data_init(cms);
336 if (!sd)
337 goto err;
338 si = M_ASN1_new_of(CMS_SignerInfo);
339 if (!si)
340 goto merr;
341 X509_check_purpose(signer, -1, -1);
342
343 CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
344 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
345
346 si->pkey = pk;
347 si->signer = signer;
e365352d
DSH		 348 EVP_MD_CTX_init(&si->mctx);
349 si->pctx = NULL;
8931b30d
DSH		 350
351 if (flags & CMS_USE_KEYID)
352 {
353 si->version = 3;
354 if (sd->version < 3)
355 sd->version = 3;
356 type = CMS_SIGNERINFO_KEYIDENTIFIER;
357 }
358 else
359 {
360 type = CMS_SIGNERINFO_ISSUER_SERIAL;
361 si->version = 1;
362 }
363
364 if (!cms_set1_SignerIdentifier(si->sid, signer, type))
365 goto err;
366
367 if (md == NULL)
368 {
369 int def_nid;
370 if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0)
371 goto err;
372 md = EVP_get_digestbynid(def_nid);
373 if (md == NULL)
374 {
375 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST);
376 goto err;
377 }
378 }
379
380 if (!md)
381 {
382 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET);
383 goto err;
384 }
385
31d66c2a 386 X509_ALGOR_set_md(si->digestAlgorithm, md);
8931b30d
DSH		 387
388 /* See if digest is present in digestAlgorithms */
389 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
390 {
391 ASN1_OBJECT *aoid;
392 alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
393 X509_ALGOR_get0(&aoid, NULL, NULL, alg);
394 if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
395 break;
396 }
397
398 if (i == sk_X509_ALGOR_num(sd->digestAlgorithms))
399 {
400 alg = X509_ALGOR_new();
401 if (!alg)
402 goto merr;
31d66c2a 403 X509_ALGOR_set_md(alg, md);
8931b30d
DSH		 404 if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg))
405 {
406 X509_ALGOR_free(alg);
407 goto merr;
408 }
409 }
410
e365352d
DSH		 411 if (!(flags & CMS_KEY_PARAM) && !cms_sd_asn1_ctrl(si, 0))
412 goto err;
8931b30d
DSH		 413 if (!(flags & CMS_NOATTR))
414 {
ff80280b
DSH		 415 /* Initialialize signed attributes strutucture so other
416 * attributes such as signing time etc are added later
417 * even if we add none here.
418 */
419 if (!si->signedAttrs)
420 {
421 si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
422 if (!si->signedAttrs)
423 goto merr;
424 }
425
8931b30d
DSH		 426 if (!(flags & CMS_NOSMIMECAP))
427 {
428 STACK_OF(X509_ALGOR) *smcap = NULL;
429 i = CMS_add_standard_smimecap(&smcap);
430 if (i)
431 i = CMS_add_smimecap(si, smcap);
432 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
433 if (!i)
434 goto merr;
435 }
436 if (flags & CMS_REUSE_DIGEST)
437 {
438 if (!cms_copy_messageDigest(cms, si))
439 goto err;
e365352d 440 if (!(flags & (CMS_PARTIAL|CMS_KEY_PARAM)) &&
8931b30d
DSH		 441 !CMS_SignerInfo_sign(si))
442 goto err;
443 }
444 }
445
446 if (!(flags & CMS_NOCERTS))
447 {
448 /* NB ignore -1 return for duplicate cert */
449 if (!CMS_add1_cert(cms, signer))
450 goto merr;
451 }
452
e365352d
DSH		 453 if (flags & CMS_KEY_PARAM)
454 {
455 if (flags & CMS_NOATTR)
456 {
457 si->pctx = EVP_PKEY_CTX_new(si->pkey, NULL);
458 if (!si->pctx)
459 goto err;
460 if (EVP_PKEY_sign_init(si->pctx) <= 0)
461 goto err;
462 if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0)
463 goto err;
464 }
465 else if (EVP_DigestSignInit(&si->mctx, &si->pctx, md, NULL, pk) <= 0)
466 goto err;
467 }
468
8931b30d
DSH		 469 if (!sd->signerInfos)
470 sd->signerInfos = sk_CMS_SignerInfo_new_null();
471 if (!sd->signerInfos ||
472 !sk_CMS_SignerInfo_push(sd->signerInfos, si))
473 goto merr;
474
475 return si;
476
477 merr:
478 CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
479 err:
480 if (si)
481 M_ASN1_free_of(si, CMS_SignerInfo);
482 return NULL;
483
484 }
485
1e26a8ba 486static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
8931b30d
DSH		 487 {
488 ASN1_TIME *tt;
489 int r = 0;
490 if (t)
491 tt = t;
492 else
493 tt = X509_gmtime_adj(NULL, 0);
494
495 if (!tt)
496 goto merr;
497
498 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
499 tt->type, tt, -1) <= 0)
500 goto merr;
501
502 r = 1;
503
504 merr:
505
506 if (!t)
507 ASN1_TIME_free(tt);
508
509 if (!r)
510 CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
511
512 return r;
513
514 }
515
e365352d
DSH		 516EVP_PKEY_CTX *CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo *si)
517 {
518 return si->pctx;
519 }
520
521EVP_MD_CTX *CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo *si)
522 {
523 return &si->mctx;
524 }
525
8931b30d
DSH		 526STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
527 {
528 CMS_SignedData *sd;
529 sd = cms_get0_signed(cms);
530 if (!sd)
531 return NULL;
532 return sd->signerInfos;
533 }
534
535STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
536 {
537 STACK_OF(X509) *signers = NULL;
538 STACK_OF(CMS_SignerInfo) *sinfos;
539 CMS_SignerInfo *si;
540 int i;
541 sinfos = CMS_get0_SignerInfos(cms);
542 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
543 {
544 si = sk_CMS_SignerInfo_value(sinfos, i);
545 if (si->signer)
546 {
547 if (!signers)
548 {
549 signers = sk_X509_new_null();
550 if (!signers)
551 return NULL;
552 }
553 if (!sk_X509_push(signers, si->signer))
554 {
555 sk_X509_free(signers);
556 return NULL;
557 }
558 }
559 }
560 return signers;
561 }
562
563void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
564 {
565 if (signer)
566 {
567 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
568 if (si->pkey)
569 EVP_PKEY_free(si->pkey);
570 si->pkey = X509_get_pubkey(signer);
571 }
572 if (si->signer)
573 X509_free(si->signer);
574 si->signer = signer;
575 }
576
577int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
578 ASN1_OCTET_STRING **keyid,
579 X509_NAME **issuer, ASN1_INTEGER **sno)
580 {
581 return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
582 }
583
584int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
585 {
586 return cms_SignerIdentifier_cert_cmp(si->sid, cert);
587 }
588
589int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
590 unsigned int flags)
591 {
592 CMS_SignedData *sd;
593 CMS_SignerInfo *si;
594 CMS_CertificateChoices *cch;
595 STACK_OF(CMS_CertificateChoices) *certs;
596 X509 *x;
597 int i, j;
598 int ret = 0;
599 sd = cms_get0_signed(cms);
600 if (!sd)
601 return -1;
602 certs = sd->certificates;
603 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
604 {
605 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
606 if (si->signer)
607 continue;
608
609 for (j = 0; j < sk_X509_num(scerts); j++)
610 {
611 x = sk_X509_value(scerts, j);
612 if (CMS_SignerInfo_cert_cmp(si, x) == 0)
613 {
614 CMS_SignerInfo_set1_signer_cert(si, x);
615 ret++;
616 break;
617 }
618 }
619
620 if (si->signer || (flags & CMS_NOINTERN))
621 continue;
622
623 for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++)
624 {
625 cch = sk_CMS_CertificateChoices_value(certs, j);
626 if (cch->type != 0)
627 continue;
628 x = cch->d.certificate;
629 if (CMS_SignerInfo_cert_cmp(si, x) == 0)
630 {
631 CMS_SignerInfo_set1_signer_cert(si, x);
632 ret++;
633 break;
634 }
635 }
636 }
637 return ret;
638 }
639
640void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk, X509 **signer,
641 X509_ALGOR **pdig, X509_ALGOR **psig)
642 {
643 if (pk)
644 *pk = si->pkey;
645 if (signer)
646 *signer = si->signer;
647 if (pdig)
648 *pdig = si->digestAlgorithm;
649 if (psig)
650 *psig = si->signatureAlgorithm;
651 }
652
ff80280b
DSH		 653static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
654 CMS_SignerInfo *si, BIO *chain)
8931b30d
DSH		 655 {
656 EVP_MD_CTX mctx;
657 int r = 0;
e365352d 658 EVP_PKEY_CTX *pctx = NULL;
8931b30d
DSH		 659 EVP_MD_CTX_init(&mctx);
660
8931b30d
DSH		 661 if (!si->pkey)
662 {
663 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
664 return 0;
665 }
666
667 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
668 goto err;
e365352d
DSH		 669 /* Set SignerInfo algortihm details if we used custom parametsr */
670 if (si->pctx && !cms_sd_asn1_ctrl(si, 0))
671 goto err;
8931b30d
DSH		 672
673 /* If any signed attributes calculate and add messageDigest attribute */
674
675 if (CMS_signed_get_attr_count(si) >= 0)
676 {
ff80280b
DSH		 677 ASN1_OBJECT *ctype =
678 cms->d.signedData->encapContentInfo->eContentType;
8931b30d
DSH		 679 unsigned char md[EVP_MAX_MD_SIZE];
680 unsigned int mdlen;
b6dcdbfc
DSH		 681 if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
682 goto err;
8931b30d
DSH		 683 if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
684 V_ASN1_OCTET_STRING,
685 md, mdlen))
686 goto err;
ff80280b
DSH		 687 /* Copy content type across */
688 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
689 V_ASN1_OBJECT, ctype, -1) <= 0)
690 goto err;
8931b30d
DSH		 691 if (!CMS_SignerInfo_sign(si))
692 goto err;
693 }
e365352d
DSH		 694 else if (si->pctx)
695 {
696 unsigned char *sig;
697 size_t siglen;
698 unsigned char md[EVP_MAX_MD_SIZE];
699 unsigned int mdlen;
700 pctx = si->pctx;
701 if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
702 goto err;
703 sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
704 if (!sig)
705 {
706 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
707 ERR_R_MALLOC_FAILURE);
708 goto err;
709 }
710 if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0)
711 goto err;
712 ASN1_STRING_set0(si->signature, sig, siglen);
713 }
8931b30d
DSH		 714 else
715 {
716 unsigned char *sig;
717 unsigned int siglen;
718 sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
719 if (!sig)
720 {
721 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
722 ERR_R_MALLOC_FAILURE);
723 goto err;
724 }
725 if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey))
726 {
727 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
728 CMS_R_SIGNFINAL_ERROR);
729 OPENSSL_free(sig);
730 goto err;
731 }
732 ASN1_STRING_set0(si->signature, sig, siglen);
733 }
734
735 r = 1;
736
737 err:
738 EVP_MD_CTX_cleanup(&mctx);
e365352d
DSH		 739 if (pctx)
740 EVP_PKEY_CTX_free(pctx);
8931b30d
DSH		 741 return r;
742
743 }
744
745int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
746 {
747 STACK_OF(CMS_SignerInfo) *sinfos;
748 CMS_SignerInfo *si;
749 int i;
750 sinfos = CMS_get0_SignerInfos(cms);
751 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
752 {
753 si = sk_CMS_SignerInfo_value(sinfos, i);
ff80280b 754 if (!cms_SignerInfo_content_sign(cms, si, chain))
8931b30d
DSH		 755 return 0;
756 }
761ffa72 757 cms->d.signedData->encapContentInfo->partial = 0;
8931b30d
DSH		 758 return 1;
759 }
760
761int CMS_SignerInfo_sign(CMS_SignerInfo *si)
762 {
e365352d 763 EVP_MD_CTX *mctx = &si->mctx;
8931b30d
DSH		 764 EVP_PKEY_CTX *pctx;
765 unsigned char *abuf = NULL;
766 int alen;
767 size_t siglen;
768 const EVP_MD *md = NULL;
769
770 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
771 if (md == NULL)
772 return 0;
773
8931b30d
DSH		 774
775 if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0)
776 {
1e26a8ba 777 if (!cms_add1_signingTime(si, NULL))
8931b30d
DSH		 778 goto err;
779 }
780
e365352d
DSH		 781 if (si->pctx)
782 pctx = si->pctx;
783 else
784 {
785 EVP_MD_CTX_init(mctx);
786 if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
787 goto err;
788 }
8931b30d
DSH		 789
790 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
791 EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0)
792 {
793 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
794 goto err;
795 }
796
797 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
798 ASN1_ITEM_rptr(CMS_Attributes_Sign));
799 if(!abuf)
800 goto err;
e365352d 801 if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
8931b30d 802 goto err;
e365352d 803 if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
8931b30d
DSH		 804 goto err;
805 OPENSSL_free(abuf);
806 abuf = OPENSSL_malloc(siglen);
807 if(!abuf)
808 goto err;
e365352d 809 if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
8931b30d
DSH		 810 goto err;
811
812 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
813 EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0)
814 {
815 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
816 goto err;
817 }
818
e365352d 819 EVP_MD_CTX_cleanup(mctx);
8931b30d
DSH		 820
821 ASN1_STRING_set0(si->signature, abuf, siglen);
822
823 return 1;
824
825 err:
826 if (abuf)
827 OPENSSL_free(abuf);
e365352d 828 EVP_MD_CTX_cleanup(mctx);
8931b30d
DSH		 829 return 0;
830
831 }
832
833int CMS_SignerInfo_verify(CMS_SignerInfo *si)
834 {
e365352d 835 EVP_MD_CTX *mctx = &si->mctx;
8931b30d
DSH		 836 unsigned char *abuf = NULL;
837 int alen, r = -1;
838 const EVP_MD *md = NULL;
839
840 if (!si->pkey)
841 {
842 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
843 return -1;
844 }
845
846 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
847 if (md == NULL)
848 return -1;
e365352d
DSH		 849 EVP_MD_CTX_init(mctx);
850 if (EVP_DigestVerifyInit(mctx, &si->pctx, md, NULL, si->pkey) <= 0)
851 goto err;
852
853 if (!cms_sd_asn1_ctrl(si, 1))
8931b30d
DSH		 854 goto err;
855
856 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
857 ASN1_ITEM_rptr(CMS_Attributes_Verify));
858 if(!abuf)
859 goto err;
e365352d 860 r = EVP_DigestVerifyUpdate(mctx, abuf, alen);
8931b30d
DSH		 861 OPENSSL_free(abuf);
862 if (r <= 0)
863 {
864 r = -1;
865 goto err;
866 }
e365352d 867 r = EVP_DigestVerifyFinal(mctx,
8931b30d 868 si->signature->data, si->signature->length);
d7106112 869 if (r <= 0)
8931b30d
DSH		 870 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
871 err:
e365352d 872 EVP_MD_CTX_cleanup(mctx);
8931b30d
DSH		 873 return r;
874 }
875
876/* Create a chain of digest BIOs from a CMS ContentInfo */
877
878BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
879 {
880 int i;
881 CMS_SignedData *sd;
882 BIO *chain = NULL;
883 sd = cms_get0_signed(cms);
8931b30d
DSH		 884 if (!sd)
885 return NULL;
761ffa72
DSH		 886 if (cms->d.signedData->encapContentInfo->partial)
887 cms_sd_set_version(sd);
8931b30d
DSH		 888 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
889 {
890 X509_ALGOR *digestAlgorithm;
891 BIO *mdbio;
892 digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
893 mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
894 if (!mdbio)
895 goto err;
896 if (chain)
897 BIO_push(chain, mdbio);
898 else
899 chain = mdbio;
900 }
901 return chain;
902 err:
903 if (chain)
904 BIO_free_all(chain);
905 return NULL;
906 }
907
908int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
909 {
910 ASN1_OCTET_STRING *os = NULL;
911 EVP_MD_CTX mctx;
e365352d 912 EVP_PKEY_CTX *pkctx = NULL;
8931b30d 913 int r = -1;
e365352d
DSH		 914 unsigned char mval[EVP_MAX_MD_SIZE];
915 unsigned int mlen;
8931b30d
DSH		 916 EVP_MD_CTX_init(&mctx);
917 /* If we have any signed attributes look for messageDigest value */
918 if (CMS_signed_get_attr_count(si) >= 0)
919 {
920 os = CMS_signed_get0_data_by_OBJ(si,
921 OBJ_nid2obj(NID_pkcs9_messageDigest),
922 -3, V_ASN1_OCTET_STRING);
923 if (!os)
924 {
925 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
926 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
927 goto err;
928 }
929 }
930
931 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
932 goto err;
933
e365352d
DSH		 934 if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0)
935 {
936 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
937 CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
938 goto err;
939 }
940
8931b30d
DSH		 941 /* If messageDigest found compare it */
942
943 if (os)
944 {
1e26a8ba 945 if (mlen != (unsigned int)os->length)
8931b30d
DSH		 946 {
947 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
948 CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
949 goto err;
950 }
951
952 if (memcmp(mval, os->data, mlen))
953 {
954 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
955 CMS_R_VERIFICATION_FAILURE);
956 r = 0;
957 }
958 else
959 r = 1;
960 }
961 else
962 {
e365352d
DSH		 963 const EVP_MD *md = EVP_MD_CTX_md(&mctx);
964 pkctx = EVP_PKEY_CTX_new(si->pkey, NULL);
965 if (EVP_PKEY_verify_init(pkctx) <= 0)
966 goto err;
967 if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0)
968 goto err;
969 si->pctx = pkctx;
970 if (!cms_sd_asn1_ctrl(si, 1))
971 goto err;
972 r = EVP_PKEY_verify(pkctx, si->signature->data,
973 si->signature->length,
974 mval, mlen);
8931b30d
DSH		 975 if (r <= 0)
976 {
977 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
978 CMS_R_VERIFICATION_FAILURE);
979 r = 0;
980 }
981 }
982
983 err:
e365352d
DSH		 984 if (pkctx)
985 EVP_PKEY_CTX_free(pkctx);
8931b30d
DSH		 986 EVP_MD_CTX_cleanup(&mctx);
987 return r;
988
989 }
990
991int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
992 {
993 unsigned char *smder = NULL;
994 int smderlen, r;
995 smderlen = i2d_X509_ALGORS(algs, &smder);
996 if (smderlen <= 0)
997 return 0;
998 r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
999 V_ASN1_SEQUENCE, smder, smderlen);
1000 OPENSSL_free(smder);
1001 return r;
1002 }
1003
1004int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
1005 int algnid, int keysize)
1006 {
1007 X509_ALGOR *alg;
1008 ASN1_INTEGER *key = NULL;
1009 if (keysize > 0)
1010 {
1011 key = ASN1_INTEGER_new();
1012 if (!key || !ASN1_INTEGER_set(key, keysize))
1013 return 0;
1014 }
1015 alg = X509_ALGOR_new();
1016 if (!alg)
1017 {
1018 if (key)
1019 ASN1_INTEGER_free(key);
1020 return 0;
1021 }
1022
1023 X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
1024 key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
1025 if (!*algs)
1026 *algs = sk_X509_ALGOR_new_null();
1027 if (!*algs || !sk_X509_ALGOR_push(*algs, alg))
1028 {
1029 X509_ALGOR_free(alg);
1030 return 0;
1031 }
1032 return 1;
1033 }
1034
1035/* Check to see if a cipher exists and if so add S/MIME capabilities */
1036
1037static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
1038 {
1039 if (EVP_get_cipherbynid(nid))
1040 return CMS_add_simple_smimecap(sk, nid, arg);
1041 return 1;
1042 }
1043
1044static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
1045 {
1046 if (EVP_get_digestbynid(nid))
1047 return CMS_add_simple_smimecap(sk, nid, arg);
1048 return 1;
1049 }
1050
1051int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
1052 {
1053 if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
1054 || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
1055 || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
1056 || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
1057 || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
1058 || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
1059 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
1060 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
1061 || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
1062 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
1063 return 0;
1064 return 1;
1065 }
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