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Remove old versions of OpenSSL.
[dragonfly.git] / crypto / openssl-0.9 / crypto / cms / cms_sd.c
blob591bfbec33b22c1ffcb0a02a3d0e0da74804c0bc
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
62 /* CMS SignedData Utilities */
63
64 DECLARE_ASN1_ITEM(CMS_SignedData)
65
66 static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
67 {
68 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed)
69 {
70 CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
71 return NULL;
72 }
73 return cms->d.signedData;
74 }
75
76 static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
77 {
78 if (cms->d.other == NULL)
79 {
80 cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
81 if (!cms->d.signedData)
82 {
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 }
96
97 /* Just initialize SignedData e.g. for certs only structure */
98
99 int CMS_SignedData_init(CMS_ContentInfo *cms)
100 {
101 if (cms_signed_data_init(cms))
102 return 1;
103 else
104 return 0;
105 }
106
107 /* Check structures and fixup version numbers (if necessary) */
108
109 static void cms_sd_set_version(CMS_SignedData *sd)
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 {
118 cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
119 if (cch->type == CMS_CERTCHOICE_OTHER)
120 {
121 if (sd->version < 5)
122 sd->version = 5;
123 }
124 else if (cch->type == CMS_CERTCHOICE_V2ACERT)
125 {
126 if (sd->version < 4)
127 sd->version = 4;
128 }
129 else if (cch->type == CMS_CERTCHOICE_V1ACERT)
130 {
131 if (sd->version < 3)
132 sd->version = 3;
133 }
134 }
135
136 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++)
137 {
138 rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
139 if (rch->type == CMS_REVCHOICE_OTHER)
140 {
141 if (sd->version < 5)
142 sd->version = 5;
143 }
144 }
145
146 if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
147 && (sd->version < 3))
148 sd->version = 3;
149
150 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
151 {
152 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
153 if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
154 {
155 if (si->version < 3)
156 si->version = 3;
157 if (sd->version < 3)
158 sd->version = 3;
159 }
160 else
161 sd->version = 1;
162 }
163
164 if (sd->version < 1)
165 sd->version = 1;
166
167 }
168
169 /* Copy an existing messageDigest value */
170
171 static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
172 {
173 STACK_OF(CMS_SignerInfo) *sinfos;
174 CMS_SignerInfo *sitmp;
175 int i;
176 sinfos = CMS_get0_SignerInfos(cms);
177 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
178 {
179 ASN1_OCTET_STRING *messageDigest;
180 sitmp = sk_CMS_SignerInfo_value(sinfos, i);
181 if (sitmp == si)
182 continue;
183 if (CMS_signed_get_attr_count(sitmp) < 0)
184 continue;
185 if (OBJ_cmp(si->digestAlgorithm->algorithm,
186 sitmp->digestAlgorithm->algorithm))
187 continue;
188 messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
189 OBJ_nid2obj(NID_pkcs9_messageDigest),
190 -3, V_ASN1_OCTET_STRING);
191 if (!messageDigest)
192 {
193 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
194 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
195 return 0;
196 }
197
198 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
199 V_ASN1_OCTET_STRING,
200 messageDigest, -1))
201 return 1;
202 else
203 return 0;
204 }
205 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
206 return 0;
207 }
208
209 int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
210 {
211 switch(type)
212 {
213 case CMS_SIGNERINFO_ISSUER_SERIAL:
214 sid->d.issuerAndSerialNumber =
215 M_ASN1_new_of(CMS_IssuerAndSerialNumber);
216 if (!sid->d.issuerAndSerialNumber)
217 goto merr;
218 if (!X509_NAME_set(&sid->d.issuerAndSerialNumber->issuer,
219 X509_get_issuer_name(cert)))
220 goto merr;
221 ASN1_STRING_free(sid->d.issuerAndSerialNumber->serialNumber);
222 sid->d.issuerAndSerialNumber->serialNumber =
223 ASN1_STRING_dup(X509_get_serialNumber(cert));
224 if(!sid->d.issuerAndSerialNumber->serialNumber)
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 /* Since no EVP_PKEY_METHOD in 0.9.8 hard code SHA1 as default */
345 if (md == NULL)
346 md = EVP_sha1();
347
348 /* OpenSSL 0.9.8 only supports SHA1 with non-RSA keys */
349
350 if ((pk->type != EVP_PKEY_RSA) && (EVP_MD_type(md) != NID_sha1))
351 {
352 CMSerr(CMS_F_CMS_ADD1_SIGNER,
353 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
354 goto err;
355 }
356
357 cms_DigestAlgorithm_set(si->digestAlgorithm, md);
358
359 /* See if digest is present in digestAlgorithms */
360 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
361 {
362 ASN1_OBJECT *aoid;
363 alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
364 X509_ALGOR_get0(&aoid, NULL, NULL, alg);
365 if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
366 break;
367 }
368
369 if (i == sk_X509_ALGOR_num(sd->digestAlgorithms))
370 {
371 alg = X509_ALGOR_new();
372 if (!alg)
373 goto merr;
374 cms_DigestAlgorithm_set(alg, md);
375 if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg))
376 {
377 X509_ALGOR_free(alg);
378 goto merr;
379 }
380 }
381
382 /* Since we have no EVP_PKEY_ASN1_METHOD in OpenSSL 0.9.8,
383 * hard code algorithm parameters.
384 */
385
386 switch (pk->type)
387 {
388
389 case EVP_PKEY_RSA:
390 X509_ALGOR_set0(si->signatureAlgorithm,
391 OBJ_nid2obj(NID_rsaEncryption),
392 V_ASN1_NULL, 0);
393 break;
394
395 case EVP_PKEY_DSA:
396 X509_ALGOR_set0(si->signatureAlgorithm,
397 OBJ_nid2obj(NID_dsaWithSHA1),
398 V_ASN1_UNDEF, 0);
399 break;
400
401
402 case EVP_PKEY_EC:
403 X509_ALGOR_set0(si->signatureAlgorithm,
404 OBJ_nid2obj(NID_ecdsa_with_SHA1),
405 V_ASN1_UNDEF, 0);
406 break;
407
408 default:
409 CMSerr(CMS_F_CMS_ADD1_SIGNER,
410 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
411 goto err;
412
413 }
414
415 if (!(flags & CMS_NOATTR))
416 {
417 /* Initialialize signed attributes strutucture so other
418 * attributes such as signing time etc are added later
419 * even if we add none here.
420 */
421 if (!si->signedAttrs)
422 {
423 si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
424 if (!si->signedAttrs)
425 goto merr;
426 }
427
428 if (!(flags & CMS_NOSMIMECAP))
429 {
430 STACK_OF(X509_ALGOR) *smcap = NULL;
431 i = CMS_add_standard_smimecap(&smcap);
432 if (i)
433 i = CMS_add_smimecap(si, smcap);
434 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
435 if (!i)
436 goto merr;
437 }
438 if (flags & CMS_REUSE_DIGEST)
439 {
440 if (!cms_copy_messageDigest(cms, si))
441 goto err;
442 if (!(flags & CMS_PARTIAL) &&
443 !CMS_SignerInfo_sign(si))
444 goto err;
445 }
446 }
447
448 if (!(flags & CMS_NOCERTS))
449 {
450 /* NB ignore -1 return for duplicate cert */
451 if (!CMS_add1_cert(cms, signer))
452 goto merr;
453 }
454
455 if (!sd->signerInfos)
456 sd->signerInfos = sk_CMS_SignerInfo_new_null();
457 if (!sd->signerInfos ||
458 !sk_CMS_SignerInfo_push(sd->signerInfos, si))
459 goto merr;
460
461 return si;
462
463 merr:
464 CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
465 err:
466 if (si)
467 M_ASN1_free_of(si, CMS_SignerInfo);
468 return NULL;
469
470 }
471
472 static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
473 {
474 ASN1_TIME *tt;
475 int r = 0;
476 if (t)
477 tt = t;
478 else
479 tt = X509_gmtime_adj(NULL, 0);
480
481 if (!tt)
482 goto merr;
483
484 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
485 tt->type, tt, -1) <= 0)
486 goto merr;
487
488 r = 1;
489
490 merr:
491
492 if (!t)
493 ASN1_TIME_free(tt);
494
495 if (!r)
496 CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
497
498 return r;
499
500 }
501
502 STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
503 {
504 CMS_SignedData *sd;
505 sd = cms_get0_signed(cms);
506 if (!sd)
507 return NULL;
508 return sd->signerInfos;
509 }
510
511 STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
512 {
513 STACK_OF(X509) *signers = NULL;
514 STACK_OF(CMS_SignerInfo) *sinfos;
515 CMS_SignerInfo *si;
516 int i;
517 sinfos = CMS_get0_SignerInfos(cms);
518 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
519 {
520 si = sk_CMS_SignerInfo_value(sinfos, i);
521 if (si->signer)
522 {
523 if (!signers)
524 {
525 signers = sk_X509_new_null();
526 if (!signers)
527 return NULL;
528 }
529 if (!sk_X509_push(signers, si->signer))
530 {
531 sk_X509_free(signers);
532 return NULL;
533 }
534 }
535 }
536 return signers;
537 }
538
539 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
540 {
541 if (signer)
542 {
543 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
544 if (si->pkey)
545 EVP_PKEY_free(si->pkey);
546 si->pkey = X509_get_pubkey(signer);
547 }
548 if (si->signer)
549 X509_free(si->signer);
550 si->signer = signer;
551 }
552
553 int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
554 ASN1_OCTET_STRING **keyid,
555 X509_NAME **issuer, ASN1_INTEGER **sno)
556 {
557 return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
558 }
559
560 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
561 {
562 return cms_SignerIdentifier_cert_cmp(si->sid, cert);
563 }
564
565 int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
566 unsigned int flags)
567 {
568 CMS_SignedData *sd;
569 CMS_SignerInfo *si;
570 CMS_CertificateChoices *cch;
571 STACK_OF(CMS_CertificateChoices) *certs;
572 X509 *x;
573 int i, j;
574 int ret = 0;
575 sd = cms_get0_signed(cms);
576 if (!sd)
577 return -1;
578 certs = sd->certificates;
579 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++)
580 {
581 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
582 if (si->signer)
583 continue;
584
585 for (j = 0; j < sk_X509_num(scerts); j++)
586 {
587 x = sk_X509_value(scerts, j);
588 if (CMS_SignerInfo_cert_cmp(si, x) == 0)
589 {
590 CMS_SignerInfo_set1_signer_cert(si, x);
591 ret++;
592 break;
593 }
594 }
595
596 if (si->signer || (flags & CMS_NOINTERN))
597 continue;
598
599 for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++)
600 {
601 cch = sk_CMS_CertificateChoices_value(certs, j);
602 if (cch->type != 0)
603 continue;
604 x = cch->d.certificate;
605 if (CMS_SignerInfo_cert_cmp(si, x) == 0)
606 {
607 CMS_SignerInfo_set1_signer_cert(si, x);
608 ret++;
609 break;
610 }
611 }
612 }
613 return ret;
614 }
615
616 void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk, X509 **signer,
617 X509_ALGOR **pdig, X509_ALGOR **psig)
618 {
619 if (pk)
620 *pk = si->pkey;
621 if (signer)
622 *signer = si->signer;
623 if (pdig)
624 *pdig = si->digestAlgorithm;
625 if (psig)
626 *psig = si->signatureAlgorithm;
627 }
628
629 /* In OpenSSL 0.9.8 we have the link between digest types and public
630 * key types so we need to fixup the digest type if the public key
631 * type is not appropriate.
632 */
633
634 static void cms_fixup_mctx(EVP_MD_CTX *mctx, EVP_PKEY *pkey)
635 {
636 if (EVP_MD_CTX_type(mctx) != NID_sha1)
637 return;
638 #ifndef OPENSSL_NO_DSA
639 if (pkey->type == EVP_PKEY_DSA)
640 mctx->digest = EVP_dss1();
641 #endif
642 #ifndef OPENSSL_NO_ECDSA
643 if (pkey->type == EVP_PKEY_EC)
644 mctx->digest = EVP_ecdsa();
645 #endif
646 }
647
648 static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
649 CMS_SignerInfo *si, BIO *chain)
650 {
651 EVP_MD_CTX mctx;
652 int r = 0;
653 EVP_MD_CTX_init(&mctx);
654
655
656 if (!si->pkey)
657 {
658 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
659 return 0;
660 }
661
662 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
663 goto err;
664
665 /* If any signed attributes calculate and add messageDigest attribute */
666
667 if (CMS_signed_get_attr_count(si) >= 0)
668 {
669 ASN1_OBJECT *ctype =
670 cms->d.signedData->encapContentInfo->eContentType;
671 unsigned char md[EVP_MAX_MD_SIZE];
672 unsigned int mdlen;
673 EVP_DigestFinal_ex(&mctx, md, &mdlen);
674 if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
675 V_ASN1_OCTET_STRING,
676 md, mdlen))
677 goto err;
678 /* Copy content type across */
679 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
680 V_ASN1_OBJECT, ctype, -1) <= 0)
681 goto err;
682 if (!CMS_SignerInfo_sign(si))
683 goto err;
684 }
685 else
686 {
687 unsigned char *sig;
688 unsigned int siglen;
689 sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
690 if (!sig)
691 {
692 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
693 ERR_R_MALLOC_FAILURE);
694 goto err;
695 }
696 cms_fixup_mctx(&mctx, si->pkey);
697 if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey))
698 {
699 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN,
700 CMS_R_SIGNFINAL_ERROR);
701 OPENSSL_free(sig);
702 goto err;
703 }
704 ASN1_STRING_set0(si->signature, sig, siglen);
705 }
706
707 r = 1;
708
709 err:
710 EVP_MD_CTX_cleanup(&mctx);
711 return r;
712
713 }
714
715 int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
716 {
717 STACK_OF(CMS_SignerInfo) *sinfos;
718 CMS_SignerInfo *si;
719 int i;
720 sinfos = CMS_get0_SignerInfos(cms);
721 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
722 {
723 si = sk_CMS_SignerInfo_value(sinfos, i);
724 if (!cms_SignerInfo_content_sign(cms, si, chain))
725 return 0;
726 }
727 cms->d.signedData->encapContentInfo->partial = 0;
728 return 1;
729 }
730
731 int CMS_SignerInfo_sign(CMS_SignerInfo *si)
732 {
733 EVP_MD_CTX mctx;
734 unsigned char *abuf = NULL;
735 int alen;
736 unsigned int siglen;
737 const EVP_MD *md = NULL;
738
739 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
740 if (md == NULL)
741 return 0;
742
743 EVP_MD_CTX_init(&mctx);
744
745 if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0)
746 {
747 if (!cms_add1_signingTime(si, NULL))
748 goto err;
749 }
750
751 if (EVP_SignInit_ex(&mctx, md, NULL) <= 0)
752 goto err;
753
754 #if 0
755 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
756 EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0)
757 {
758 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
759 goto err;
760 }
761 #endif
762
763 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
764 ASN1_ITEM_rptr(CMS_Attributes_Sign));
765 if(!abuf)
766 goto err;
767 if (EVP_SignUpdate(&mctx, abuf, alen) <= 0)
768 goto err;
769 siglen = EVP_PKEY_size(si->pkey);
770 OPENSSL_free(abuf);
771 abuf = OPENSSL_malloc(siglen);
772 if(!abuf)
773 goto err;
774 cms_fixup_mctx(&mctx, si->pkey);
775 if (EVP_SignFinal(&mctx, abuf, &siglen, si->pkey) <= 0)
776 goto err;
777 #if 0
778 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
779 EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0)
780 {
781 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
782 goto err;
783 }
784 #endif
785 EVP_MD_CTX_cleanup(&mctx);
786
787 ASN1_STRING_set0(si->signature, abuf, siglen);
788
789 return 1;
790
791 err:
792 if (abuf)
793 OPENSSL_free(abuf);
794 EVP_MD_CTX_cleanup(&mctx);
795 return 0;
796
797 }
798
799 int CMS_SignerInfo_verify(CMS_SignerInfo *si)
800 {
801 EVP_MD_CTX mctx;
802 unsigned char *abuf = NULL;
803 int alen, r = -1;
804 const EVP_MD *md = NULL;
805
806 if (!si->pkey)
807 {
808 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
809 return -1;
810 }
811
812 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
813 if (md == NULL)
814 return -1;
815 EVP_MD_CTX_init(&mctx);
816 if (EVP_VerifyInit_ex(&mctx, md, NULL) <= 0)
817 goto err;
818
819 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf,
820 ASN1_ITEM_rptr(CMS_Attributes_Verify));
821 if(!abuf)
822 goto err;
823 r = EVP_VerifyUpdate(&mctx, abuf, alen);
824 OPENSSL_free(abuf);
825 if (r <= 0)
826 {
827 r = -1;
828 goto err;
829 }
830 cms_fixup_mctx(&mctx, si->pkey);
831 r = EVP_VerifyFinal(&mctx,
832 si->signature->data, si->signature->length, si->pkey);
833 if (!r)
834 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
835 err:
836 EVP_MD_CTX_cleanup(&mctx);
837 return r;
838 }
839
840 /* Create a chain of digest BIOs from a CMS ContentInfo */
841
842 BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
843 {
844 int i;
845 CMS_SignedData *sd;
846 BIO *chain = NULL;
847 sd = cms_get0_signed(cms);
848 if (!sd)
849 return NULL;
850 if (cms->d.signedData->encapContentInfo->partial)
851 cms_sd_set_version(sd);
852 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++)
853 {
854 X509_ALGOR *digestAlgorithm;
855 BIO *mdbio;
856 digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
857 mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
858 if (!mdbio)
859 goto err;
860 if (chain)
861 BIO_push(chain, mdbio);
862 else
863 chain = mdbio;
864 }
865 return chain;
866 err:
867 if (chain)
868 BIO_free_all(chain);
869 return NULL;
870 }
871
872 int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
873 {
874 ASN1_OCTET_STRING *os = NULL;
875 EVP_MD_CTX mctx;
876 int r = -1;
877 EVP_MD_CTX_init(&mctx);
878 /* If we have any signed attributes look for messageDigest value */
879 if (CMS_signed_get_attr_count(si) >= 0)
880 {
881 os = CMS_signed_get0_data_by_OBJ(si,
882 OBJ_nid2obj(NID_pkcs9_messageDigest),
883 -3, V_ASN1_OCTET_STRING);
884 if (!os)
885 {
886 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
887 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
888 goto err;
889 }
890 }
891
892 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
893 goto err;
894
895 /* If messageDigest found compare it */
896
897 if (os)
898 {
899 unsigned char mval[EVP_MAX_MD_SIZE];
900 unsigned int mlen;
901 if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0)
902 {
903 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
904 CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
905 goto err;
906 }
907 if (mlen != (unsigned int)os->length)
908 {
909 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
910 CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
911 goto err;
912 }
913
914 if (memcmp(mval, os->data, mlen))
915 {
916 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
917 CMS_R_VERIFICATION_FAILURE);
918 r = 0;
919 }
920 else
921 r = 1;
922 }
923 else
924 {
925 cms_fixup_mctx(&mctx, si->pkey);
926 r = EVP_VerifyFinal(&mctx, si->signature->data,
927 si->signature->length, si->pkey);
928 if (r <= 0)
929 {
930 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
931 CMS_R_VERIFICATION_FAILURE);
932 r = 0;
933 }
934 }
935
936 err:
937 EVP_MD_CTX_cleanup(&mctx);
938 return r;
939
940 }
941
942 int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
943 {
944 unsigned char *smder = NULL;
945 int smderlen, r;
946 smderlen = i2d_X509_ALGORS(algs, &smder);
947 if (smderlen <= 0)
948 return 0;
949 r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
950 V_ASN1_SEQUENCE, smder, smderlen);
951 OPENSSL_free(smder);
952 return r;
953 }
954
955 int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
956 int algnid, int keysize)
957 {
958 X509_ALGOR *alg;
959 ASN1_INTEGER *key = NULL;
960 if (keysize > 0)
961 {
962 key = ASN1_INTEGER_new();
963 if (!key || !ASN1_INTEGER_set(key, keysize))
964 return 0;
965 }
966 alg = X509_ALGOR_new();
967 if (!alg)
968 {
969 if (key)
970 ASN1_INTEGER_free(key);
971 return 0;
972 }
973
974 X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
975 key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
976 if (!*algs)
977 *algs = sk_X509_ALGOR_new_null();
978 if (!*algs || !sk_X509_ALGOR_push(*algs, alg))
979 {
980 X509_ALGOR_free(alg);
981 return 0;
982 }
983 return 1;
984 }
985
986 /* Check to see if a cipher exists and if so add S/MIME capabilities */
987
988 static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
989 {
990 if (EVP_get_cipherbynid(nid))
991 return CMS_add_simple_smimecap(sk, nid, arg);
992 return 1;
993 }
994 #if 0
995 static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
996 {
997 if (EVP_get_digestbynid(nid))
998 return CMS_add_simple_smimecap(sk, nid, arg);
999 return 1;
1000 }
1001 #endif
1002 int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
1003 {
1004 if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
1005 || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
1006 || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
1007 || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
1008 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
1009 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
1010 || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
1011 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
1012 return 0;
1013 return 1;
1014 }
DragonFly BSD