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free NULL cleanup
[thirdparty/openssl.git] / crypto / cms / cms_sd.c
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8931b30d 1/* crypto/cms/cms_sd.c */
0f113f3e
MC		 2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
8931b30d
DSH		 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
0f113f3e 14 * notice, this list of conditions and the following disclaimer.
8931b30d
DSH		 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>
17c2764d 58#include <openssl/x509.h>
8931b30d
DSH		 59#include <openssl/x509v3.h>
60#include <openssl/err.h>
61#include <openssl/cms.h>
62#include "cms_lcl.h"
5fe736e5 63#include "internal/asn1_int.h"
8931b30d
DSH		 64
65/* CMS SignedData Utilities */
66
67DECLARE_ASN1_ITEM(CMS_SignedData)
68
69static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
0f113f3e
MC		 70{
71 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) {
72 CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
73 return NULL;
74 }
75 return cms->d.signedData;
76}
8931b30d
DSH		 77
78static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
0f113f3e
MC		 79{
80 if (cms->d.other == NULL) {
81 cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
82 if (!cms->d.signedData) {
83 CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE);
84 return NULL;
85 }
86 cms->d.signedData->version = 1;
87 cms->d.signedData->encapContentInfo->eContentType =
88 OBJ_nid2obj(NID_pkcs7_data);
89 cms->d.signedData->encapContentInfo->partial = 1;
90 ASN1_OBJECT_free(cms->contentType);
91 cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
92 return cms->d.signedData;
93 }
94 return cms_get0_signed(cms);
95}
8931b30d
DSH		 96
97/* Just initialize SignedData e.g. for certs only structure */
98
99int CMS_SignedData_init(CMS_ContentInfo *cms)
0f113f3e
MC		 100{
101 if (cms_signed_data_init(cms))
102 return 1;
103 else
104 return 0;
105}
8931b30d
DSH		 106
107/* Check structures and fixup version numbers (if necessary) */
108
109static void cms_sd_set_version(CMS_SignedData *sd)
0f113f3e
MC		 110{
111 int i;
112 CMS_CertificateChoices *cch;
113 CMS_RevocationInfoChoice *rch;
114 CMS_SignerInfo *si;
115
116 for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) {
117 cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
118 if (cch->type == CMS_CERTCHOICE_OTHER) {
119 if (sd->version < 5)
120 sd->version = 5;
121 } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
122 if (sd->version < 4)
123 sd->version = 4;
124 } else if (cch->type == CMS_CERTCHOICE_V1ACERT) {
125 if (sd->version < 3)
126 sd->version = 3;
127 }
128 }
129
130 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) {
131 rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
132 if (rch->type == CMS_REVCHOICE_OTHER) {
133 if (sd->version < 5)
134 sd->version = 5;
135 }
136 }
137
138 if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
139 && (sd->version < 3))
140 sd->version = 3;
141
142 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
143 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
144 if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
145 if (si->version < 3)
146 si->version = 3;
147 if (sd->version < 3)
148 sd->version = 3;
149 } else if (si->version < 1)
150 si->version = 1;
151 }
152
153 if (sd->version < 1)
154 sd->version = 1;
155
156}
157
8931b30d
DSH		 158/* Copy an existing messageDigest value */
159
160static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
0f113f3e
MC		 161{
162 STACK_OF(CMS_SignerInfo) *sinfos;
163 CMS_SignerInfo *sitmp;
164 int i;
165 sinfos = CMS_get0_SignerInfos(cms);
166 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
167 ASN1_OCTET_STRING *messageDigest;
168 sitmp = sk_CMS_SignerInfo_value(sinfos, i);
169 if (sitmp == si)
170 continue;
171 if (CMS_signed_get_attr_count(sitmp) < 0)
172 continue;
173 if (OBJ_cmp(si->digestAlgorithm->algorithm,
174 sitmp->digestAlgorithm->algorithm))
175 continue;
176 messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
177 OBJ_nid2obj
178 (NID_pkcs9_messageDigest),
179 -3, V_ASN1_OCTET_STRING);
180 if (!messageDigest) {
181 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
182 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
183 return 0;
184 }
185
186 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
187 V_ASN1_OCTET_STRING,
188 messageDigest, -1))
189 return 1;
190 else
191 return 0;
192 }
193 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
194 return 0;
195}
8931b30d
DSH		 196
197int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
0f113f3e
MC		 198{
199 switch (type) {
200 case CMS_SIGNERINFO_ISSUER_SERIAL:
201 if (!cms_set1_ias(&sid->d.issuerAndSerialNumber, cert))
202 return 0;
203 break;
8931b30d 204
0f113f3e
MC		 205 case CMS_SIGNERINFO_KEYIDENTIFIER:
206 if (!cms_set1_keyid(&sid->d.subjectKeyIdentifier, cert))
207 return 0;
208 break;
8931b30d 209
0f113f3e
MC		 210 default:
211 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
212 return 0;
213 }
8931b30d 214
0f113f3e 215 sid->type = type;
8931b30d 216
0f113f3e
MC		 217 return 1;
218}
8931b30d
DSH		 219
220int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
0f113f3e
MC		 221 ASN1_OCTET_STRING **keyid,
222 X509_NAME **issuer,
223 ASN1_INTEGER **sno)
224{
225 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) {
226 if (issuer)
227 *issuer = sid->d.issuerAndSerialNumber->issuer;
228 if (sno)
229 *sno = sid->d.issuerAndSerialNumber->serialNumber;
230 } else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
231 if (keyid)
232 *keyid = sid->d.subjectKeyIdentifier;
233 } else
234 return 0;
235 return 1;
236}
8931b30d
DSH		 237
238int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
0f113f3e
MC		 239{
240 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
241 return cms_ias_cert_cmp(sid->d.issuerAndSerialNumber, cert);
242 else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
243 return cms_keyid_cert_cmp(sid->d.subjectKeyIdentifier, cert);
244 else
245 return -1;
246}
8931b30d 247
e365352d 248static int cms_sd_asn1_ctrl(CMS_SignerInfo *si, int cmd)
0f113f3e
MC		 249{
250 EVP_PKEY *pkey = si->pkey;
251 int i;
252 if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
253 return 1;
254 i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_SIGN, cmd, si);
255 if (i == -2) {
256 CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
257 return 0;
258 }
259 if (i <= 0) {
260 CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_CTRL_FAILURE);
261 return 0;
262 }
263 return 1;
264}
e365352d 265
8931b30d 266CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
0f113f3e
MC		 267 X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
268 unsigned int flags)
269{
270 CMS_SignedData *sd;
271 CMS_SignerInfo *si = NULL;
272 X509_ALGOR *alg;
273 int i, type;
274 if (!X509_check_private_key(signer, pk)) {
275 CMSerr(CMS_F_CMS_ADD1_SIGNER,
276 CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
277 return NULL;
278 }
279 sd = cms_signed_data_init(cms);
280 if (!sd)
281 goto err;
282 si = M_ASN1_new_of(CMS_SignerInfo);
283 if (!si)
284 goto merr;
285 X509_check_purpose(signer, -1, -1);
286
287 CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
288 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
289
290 si->pkey = pk;
291 si->signer = signer;
292 EVP_MD_CTX_init(&si->mctx);
293 si->pctx = NULL;
294
295 if (flags & CMS_USE_KEYID) {
296 si->version = 3;
297 if (sd->version < 3)
298 sd->version = 3;
299 type = CMS_SIGNERINFO_KEYIDENTIFIER;
300 } else {
301 type = CMS_SIGNERINFO_ISSUER_SERIAL;
302 si->version = 1;
303 }
304
305 if (!cms_set1_SignerIdentifier(si->sid, signer, type))
306 goto err;
307
308 if (md == NULL) {
309 int def_nid;
310 if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0)
311 goto err;
312 md = EVP_get_digestbynid(def_nid);
313 if (md == NULL) {
314 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST);
315 goto err;
316 }
317 }
318
319 if (!md) {
320 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET);
321 goto err;
322 }
323
324 X509_ALGOR_set_md(si->digestAlgorithm, md);
325
326 /* See if digest is present in digestAlgorithms */
327 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
328 ASN1_OBJECT *aoid;
329 alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
330 X509_ALGOR_get0(&aoid, NULL, NULL, alg);
331 if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
332 break;
333 }
334
335 if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) {
336 alg = X509_ALGOR_new();
337 if (!alg)
338 goto merr;
339 X509_ALGOR_set_md(alg, md);
340 if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) {
341 X509_ALGOR_free(alg);
342 goto merr;
343 }
344 }
345
346 if (!(flags & CMS_KEY_PARAM) && !cms_sd_asn1_ctrl(si, 0))
347 goto err;
348 if (!(flags & CMS_NOATTR)) {
349 /*
350 * Initialialize signed attributes strutucture so other attributes
351 * such as signing time etc are added later even if we add none here.
352 */
353 if (!si->signedAttrs) {
354 si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
355 if (!si->signedAttrs)
356 goto merr;
357 }
358
359 if (!(flags & CMS_NOSMIMECAP)) {
360 STACK_OF(X509_ALGOR) *smcap = NULL;
361 i = CMS_add_standard_smimecap(&smcap);
362 if (i)
363 i = CMS_add_smimecap(si, smcap);
364 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
365 if (!i)
366 goto merr;
367 }
368 if (flags & CMS_REUSE_DIGEST) {
369 if (!cms_copy_messageDigest(cms, si))
370 goto err;
371 if (!(flags & (CMS_PARTIAL | CMS_KEY_PARAM)) &&
372 !CMS_SignerInfo_sign(si))
373 goto err;
374 }
375 }
376
377 if (!(flags & CMS_NOCERTS)) {
378 /* NB ignore -1 return for duplicate cert */
379 if (!CMS_add1_cert(cms, signer))
380 goto merr;
381 }
382
383 if (flags & CMS_KEY_PARAM) {
384 if (flags & CMS_NOATTR) {
385 si->pctx = EVP_PKEY_CTX_new(si->pkey, NULL);
386 if (!si->pctx)
387 goto err;
388 if (EVP_PKEY_sign_init(si->pctx) <= 0)
389 goto err;
390 if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0)
391 goto err;
392 } else if (EVP_DigestSignInit(&si->mctx, &si->pctx, md, NULL, pk) <=
393 0)
394 goto err;
395 }
396
397 if (!sd->signerInfos)
398 sd->signerInfos = sk_CMS_SignerInfo_new_null();
399 if (!sd->signerInfos || !sk_CMS_SignerInfo_push(sd->signerInfos, si))
400 goto merr;
401
402 return si;
403
404 merr:
405 CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
406 err:
407 if (si)
408 M_ASN1_free_of(si, CMS_SignerInfo);
409 return NULL;
410
411}
8931b30d 412
1e26a8ba 413static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
0f113f3e
MC		 414{
415 ASN1_TIME *tt;
416 int r = 0;
417 if (t)
418 tt = t;
419 else
420 tt = X509_gmtime_adj(NULL, 0);
8931b30d 421
0f113f3e
MC		 422 if (!tt)
423 goto merr;
8931b30d 424
0f113f3e
MC		 425 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
426 tt->type, tt, -1) <= 0)
427 goto merr;
8931b30d 428
0f113f3e 429 r = 1;
8931b30d 430
0f113f3e 431 merr:
8931b30d 432
0f113f3e
MC		 433 if (!t)
434 ASN1_TIME_free(tt);
8931b30d 435
0f113f3e
MC		 436 if (!r)
437 CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
8931b30d 438
0f113f3e 439 return r;
8931b30d 440
0f113f3e 441}
8931b30d 442
e365352d 443EVP_PKEY_CTX *CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo *si)
0f113f3e
MC		 444{
445 return si->pctx;
446}
e365352d
DSH		 447
448EVP_MD_CTX *CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo *si)
0f113f3e
MC		 449{
450 return &si->mctx;
451}
e365352d 452
8931b30d 453STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
0f113f3e
MC		 454{
455 CMS_SignedData *sd;
456 sd = cms_get0_signed(cms);
457 if (!sd)
458 return NULL;
459 return sd->signerInfos;
460}
8931b30d
DSH		 461
462STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
0f113f3e
MC		 463{
464 STACK_OF(X509) *signers = NULL;
465 STACK_OF(CMS_SignerInfo) *sinfos;
466 CMS_SignerInfo *si;
467 int i;
468 sinfos = CMS_get0_SignerInfos(cms);
469 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
470 si = sk_CMS_SignerInfo_value(sinfos, i);
471 if (si->signer) {
472 if (!signers) {
473 signers = sk_X509_new_null();
474 if (!signers)
475 return NULL;
476 }
477 if (!sk_X509_push(signers, si->signer)) {
478 sk_X509_free(signers);
479 return NULL;
480 }
481 }
482 }
483 return signers;
484}
8931b30d
DSH		 485
486void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
0f113f3e
MC		 487{
488 if (signer) {
489 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
c5ba2d99 490 EVP_PKEY_free(si->pkey);
0f113f3e
MC		 491 si->pkey = X509_get_pubkey(signer);
492 }
493 if (si->signer)
494 X509_free(si->signer);
495 si->signer = signer;
496}
8931b30d
DSH		 497
498int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
0f113f3e
MC		 499 ASN1_OCTET_STRING **keyid,
500 X509_NAME **issuer, ASN1_INTEGER **sno)
501{
502 return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
503}
8931b30d
DSH		 504
505int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
0f113f3e
MC		 506{
507 return cms_SignerIdentifier_cert_cmp(si->sid, cert);
508}
8931b30d
DSH		 509
510int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
0f113f3e
MC		 511 unsigned int flags)
512{
513 CMS_SignedData *sd;
514 CMS_SignerInfo *si;
515 CMS_CertificateChoices *cch;
516 STACK_OF(CMS_CertificateChoices) *certs;
517 X509 *x;
518 int i, j;
519 int ret = 0;
520 sd = cms_get0_signed(cms);
521 if (!sd)
522 return -1;
523 certs = sd->certificates;
524 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
525 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
526 if (si->signer)
527 continue;
528
529 for (j = 0; j < sk_X509_num(scerts); j++) {
530 x = sk_X509_value(scerts, j);
531 if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
532 CMS_SignerInfo_set1_signer_cert(si, x);
533 ret++;
534 break;
535 }
536 }
537
538 if (si->signer || (flags & CMS_NOINTERN))
539 continue;
540
541 for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) {
542 cch = sk_CMS_CertificateChoices_value(certs, j);
543 if (cch->type != 0)
544 continue;
545 x = cch->d.certificate;
546 if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
547 CMS_SignerInfo_set1_signer_cert(si, x);
548 ret++;
549 break;
550 }
551 }
552 }
553 return ret;
554}
555
556void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk,
557 X509 **signer, X509_ALGOR **pdig,
558 X509_ALGOR **psig)
559{
560 if (pk)
561 *pk = si->pkey;
562 if (signer)
563 *signer = si->signer;
564 if (pdig)
565 *pdig = si->digestAlgorithm;
566 if (psig)
567 *psig = si->signatureAlgorithm;
568}
8931b30d 569
da15c616 570ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si)
0f113f3e
MC		 571{
572 return si->signature;
573}
da15c616 574
ff80280b 575static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
0f113f3e
MC		 576 CMS_SignerInfo *si, BIO *chain)
577{
578 EVP_MD_CTX mctx;
579 int r = 0;
580 EVP_PKEY_CTX *pctx = NULL;
581 EVP_MD_CTX_init(&mctx);
582
583 if (!si->pkey) {
584 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
585 return 0;
586 }
587
588 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
589 goto err;
590 /* Set SignerInfo algortihm details if we used custom parametsr */
591 if (si->pctx && !cms_sd_asn1_ctrl(si, 0))
592 goto err;
593
594 /*
595 * If any signed attributes calculate and add messageDigest attribute
596 */
597
598 if (CMS_signed_get_attr_count(si) >= 0) {
599 ASN1_OBJECT *ctype =
600 cms->d.signedData->encapContentInfo->eContentType;
601 unsigned char md[EVP_MAX_MD_SIZE];
602 unsigned int mdlen;
603 if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
604 goto err;
605 if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
606 V_ASN1_OCTET_STRING, md, mdlen))
607 goto err;
608 /* Copy content type across */
609 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
610 V_ASN1_OBJECT, ctype, -1) <= 0)
611 goto err;
612 if (!CMS_SignerInfo_sign(si))
613 goto err;
614 } else if (si->pctx) {
615 unsigned char *sig;
616 size_t siglen;
617 unsigned char md[EVP_MAX_MD_SIZE];
618 unsigned int mdlen;
619 pctx = si->pctx;
620 if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
621 goto err;
622 siglen = EVP_PKEY_size(si->pkey);
623 sig = OPENSSL_malloc(siglen);
624 if (!sig) {
625 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
626 goto err;
627 }
628 if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0) {
629 OPENSSL_free(sig);
630 goto err;
631 }
632 ASN1_STRING_set0(si->signature, sig, siglen);
633 } else {
634 unsigned char *sig;
635 unsigned int siglen;
636 sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
637 if (!sig) {
638 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
639 goto err;
640 }
641 if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey)) {
642 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_SIGNFINAL_ERROR);
643 OPENSSL_free(sig);
644 goto err;
645 }
646 ASN1_STRING_set0(si->signature, sig, siglen);
647 }
648
649 r = 1;
650
651 err:
652 EVP_MD_CTX_cleanup(&mctx);
c5ba2d99 653 EVP_PKEY_CTX_free(pctx);
0f113f3e
MC		 654 return r;
655
656}
8931b30d
DSH		 657
658int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
0f113f3e
MC		 659{
660 STACK_OF(CMS_SignerInfo) *sinfos;
661 CMS_SignerInfo *si;
662 int i;
663 sinfos = CMS_get0_SignerInfos(cms);
664 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
665 si = sk_CMS_SignerInfo_value(sinfos, i);
666 if (!cms_SignerInfo_content_sign(cms, si, chain))
667 return 0;
668 }
669 cms->d.signedData->encapContentInfo->partial = 0;
670 return 1;
671}
8931b30d
DSH		 672
673int CMS_SignerInfo_sign(CMS_SignerInfo *si)
0f113f3e
MC		 674{
675 EVP_MD_CTX *mctx = &si->mctx;
676 EVP_PKEY_CTX *pctx;
677 unsigned char *abuf = NULL;
678 int alen;
679 size_t siglen;
680 const EVP_MD *md = NULL;
681
682 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
683 if (md == NULL)
684 return 0;
685
686 if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) {
687 if (!cms_add1_signingTime(si, NULL))
688 goto err;
689 }
690
691 if (si->pctx)
692 pctx = si->pctx;
693 else {
694 EVP_MD_CTX_init(mctx);
695 if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
696 goto err;
697 }
698
699 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
700 EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0) {
701 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
702 goto err;
703 }
704
705 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
706 ASN1_ITEM_rptr(CMS_Attributes_Sign));
707 if (!abuf)
708 goto err;
709 if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
710 goto err;
711 if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
712 goto err;
713 OPENSSL_free(abuf);
714 abuf = OPENSSL_malloc(siglen);
715 if (!abuf)
716 goto err;
717 if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
718 goto err;
719
720 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
721 EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0) {
722 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
723 goto err;
724 }
725
726 EVP_MD_CTX_cleanup(mctx);
727
728 ASN1_STRING_set0(si->signature, abuf, siglen);
729
730 return 1;
731
732 err:
733 if (abuf)
734 OPENSSL_free(abuf);
735 EVP_MD_CTX_cleanup(mctx);
736 return 0;
737
738}
8931b30d
DSH		 739
740int CMS_SignerInfo_verify(CMS_SignerInfo *si)
0f113f3e
MC		 741{
742 EVP_MD_CTX *mctx = &si->mctx;
743 unsigned char *abuf = NULL;
744 int alen, r = -1;
745 const EVP_MD *md = NULL;
746
747 if (!si->pkey) {
748 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
749 return -1;
750 }
751
752 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
753 if (md == NULL)
754 return -1;
755 EVP_MD_CTX_init(mctx);
756 if (EVP_DigestVerifyInit(mctx, &si->pctx, md, NULL, si->pkey) <= 0)
757 goto err;
758
759 if (!cms_sd_asn1_ctrl(si, 1))
760 goto err;
761
762 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
763 ASN1_ITEM_rptr(CMS_Attributes_Verify));
764 if (!abuf)
765 goto err;
766 r = EVP_DigestVerifyUpdate(mctx, abuf, alen);
767 OPENSSL_free(abuf);
768 if (r <= 0) {
769 r = -1;
770 goto err;
771 }
772 r = EVP_DigestVerifyFinal(mctx,
773 si->signature->data, si->signature->length);
774 if (r <= 0)
775 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
776 err:
777 EVP_MD_CTX_cleanup(mctx);
778 return r;
779}
8931b30d
DSH		 780
781/* Create a chain of digest BIOs from a CMS ContentInfo */
782
783BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
0f113f3e
MC		 784{
785 int i;
786 CMS_SignedData *sd;
787 BIO *chain = NULL;
788 sd = cms_get0_signed(cms);
789 if (!sd)
790 return NULL;
791 if (cms->d.signedData->encapContentInfo->partial)
792 cms_sd_set_version(sd);
793 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
794 X509_ALGOR *digestAlgorithm;
795 BIO *mdbio;
796 digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
797 mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
798 if (!mdbio)
799 goto err;
800 if (chain)
801 BIO_push(chain, mdbio);
802 else
803 chain = mdbio;
804 }
805 return chain;
806 err:
ca3a82c3 807 BIO_free_all(chain);
0f113f3e
MC		 808 return NULL;
809}
8931b30d
DSH		 810
811int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
0f113f3e
MC		 812{
813 ASN1_OCTET_STRING *os = NULL;
814 EVP_MD_CTX mctx;
815 EVP_PKEY_CTX *pkctx = NULL;
816 int r = -1;
817 unsigned char mval[EVP_MAX_MD_SIZE];
818 unsigned int mlen;
819 EVP_MD_CTX_init(&mctx);
820 /* If we have any signed attributes look for messageDigest value */
821 if (CMS_signed_get_attr_count(si) >= 0) {
822 os = CMS_signed_get0_data_by_OBJ(si,
823 OBJ_nid2obj(NID_pkcs9_messageDigest),
824 -3, V_ASN1_OCTET_STRING);
825 if (!os) {
826 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
827 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
828 goto err;
829 }
830 }
831
832 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
833 goto err;
834
835 if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0) {
836 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
837 CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
838 goto err;
839 }
840
841 /* If messageDigest found compare it */
842
843 if (os) {
844 if (mlen != (unsigned int)os->length) {
845 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
846 CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
847 goto err;
848 }
849
850 if (memcmp(mval, os->data, mlen)) {
851 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
852 CMS_R_VERIFICATION_FAILURE);
853 r = 0;
854 } else
855 r = 1;
856 } else {
857 const EVP_MD *md = EVP_MD_CTX_md(&mctx);
858 pkctx = EVP_PKEY_CTX_new(si->pkey, NULL);
859 if (EVP_PKEY_verify_init(pkctx) <= 0)
860 goto err;
861 if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0)
862 goto err;
863 si->pctx = pkctx;
864 if (!cms_sd_asn1_ctrl(si, 1))
865 goto err;
866 r = EVP_PKEY_verify(pkctx, si->signature->data,
867 si->signature->length, mval, mlen);
868 if (r <= 0) {
869 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
870 CMS_R_VERIFICATION_FAILURE);
871 r = 0;
872 }
873 }
874
875 err:
c5ba2d99 876 EVP_PKEY_CTX_free(pkctx);
0f113f3e
MC		 877 EVP_MD_CTX_cleanup(&mctx);
878 return r;
879
880}
8931b30d
DSH		 881
882int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
0f113f3e
MC		 883{
884 unsigned char *smder = NULL;
885 int smderlen, r;
886 smderlen = i2d_X509_ALGORS(algs, &smder);
887 if (smderlen <= 0)
888 return 0;
889 r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
890 V_ASN1_SEQUENCE, smder, smderlen);
891 OPENSSL_free(smder);
892 return r;
893}
8931b30d
DSH		 894
895int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
0f113f3e
MC		 896 int algnid, int keysize)
897{
898 X509_ALGOR *alg;
899 ASN1_INTEGER *key = NULL;
900 if (keysize > 0) {
901 key = ASN1_INTEGER_new();
902 if (!key || !ASN1_INTEGER_set(key, keysize))
903 return 0;
904 }
905 alg = X509_ALGOR_new();
906 if (!alg) {
907 if (key)
908 ASN1_INTEGER_free(key);
909 return 0;
910 }
911
912 X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
913 key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
914 if (!*algs)
915 *algs = sk_X509_ALGOR_new_null();
916 if (!*algs || !sk_X509_ALGOR_push(*algs, alg)) {
917 X509_ALGOR_free(alg);
918 return 0;
919 }
920 return 1;
921}
8931b30d
DSH		 922
923/* Check to see if a cipher exists and if so add S/MIME capabilities */
924
925static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
0f113f3e
MC		 926{
927 if (EVP_get_cipherbynid(nid))
928 return CMS_add_simple_smimecap(sk, nid, arg);
929 return 1;
930}
8931b30d
DSH		 931
932static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
0f113f3e
MC		 933{
934 if (EVP_get_digestbynid(nid))
935 return CMS_add_simple_smimecap(sk, nid, arg);
936 return 1;
937}
8931b30d
DSH		 938
939int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
0f113f3e
MC		 940{
941 if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
942 || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
943 || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
944 || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
945 || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
946 || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
947 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
948 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
949 || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
950 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
951 return 0;
952 return 1;
953}
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