Line data Source code
1 : /* crypto/cms/cms_sd.c */
2 : /*
3 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 : * project.
5 : */
6 : /* ====================================================================
7 : * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 : *
9 : * Redistribution and use in source and binary forms, with or without
10 : * modification, are permitted provided that the following conditions
11 : * are met:
12 : *
13 : * 1. Redistributions of source code must retain the above copyright
14 : * notice, this list of conditions and the following disclaimer.
15 : *
16 : * 2. Redistributions in binary form must reproduce the above copyright
17 : * notice, this list of conditions and the following disclaimer in
18 : * the documentation and/or other materials provided with the
19 : * distribution.
20 : *
21 : * 3. All advertising materials mentioning features or use of this
22 : * software must display the following acknowledgment:
23 : * "This product includes software developed by the OpenSSL Project
24 : * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 : *
26 : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 : * endorse or promote products derived from this software without
28 : * prior written permission. For written permission, please contact
29 : * licensing@OpenSSL.org.
30 : *
31 : * 5. Products derived from this software may not be called "OpenSSL"
32 : * nor may "OpenSSL" appear in their names without prior written
33 : * permission of the OpenSSL Project.
34 : *
35 : * 6. Redistributions of any form whatsoever must retain the following
36 : * acknowledgment:
37 : * "This product includes software developed by the OpenSSL Project
38 : * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 : *
40 : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 : * OF THE POSSIBILITY OF SUCH DAMAGE.
52 : * ====================================================================
53 : */
54 :
55 : #include "cryptlib.h"
56 : #include <openssl/asn1t.h>
57 : #include <openssl/pem.h>
58 : #include <openssl/x509.h>
59 : #include <openssl/x509v3.h>
60 : #include <openssl/err.h>
61 : #include <openssl/cms.h>
62 : #include "cms_lcl.h"
63 : #include "asn1_locl.h"
64 :
65 : /* CMS SignedData Utilities */
66 :
67 : DECLARE_ASN1_ITEM(CMS_SignedData)
68 :
69 0 : static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
70 : {
71 0 : if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) {
72 0 : CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
73 0 : return NULL;
74 : }
75 0 : return cms->d.signedData;
76 : }
77 :
78 0 : static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
79 : {
80 0 : if (cms->d.other == NULL) {
81 0 : cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
82 0 : if (!cms->d.signedData) {
83 0 : CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE);
84 0 : return NULL;
85 : }
86 0 : cms->d.signedData->version = 1;
87 0 : cms->d.signedData->encapContentInfo->eContentType =
88 0 : OBJ_nid2obj(NID_pkcs7_data);
89 0 : cms->d.signedData->encapContentInfo->partial = 1;
90 0 : ASN1_OBJECT_free(cms->contentType);
91 0 : cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
92 0 : return cms->d.signedData;
93 : }
94 0 : return cms_get0_signed(cms);
95 : }
96 :
97 : /* Just initialize SignedData e.g. for certs only structure */
98 :
99 0 : int CMS_SignedData_init(CMS_ContentInfo *cms)
100 : {
101 0 : if (cms_signed_data_init(cms))
102 : return 1;
103 : else
104 0 : return 0;
105 : }
106 :
107 : /* Check structures and fixup version numbers (if necessary) */
108 :
109 0 : 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 0 : for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) {
117 0 : cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
118 0 : if (cch->type == CMS_CERTCHOICE_OTHER) {
119 0 : if (sd->version < 5)
120 0 : sd->version = 5;
121 0 : } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
122 0 : if (sd->version < 4)
123 0 : sd->version = 4;
124 0 : } else if (cch->type == CMS_CERTCHOICE_V1ACERT) {
125 0 : if (sd->version < 3)
126 0 : sd->version = 3;
127 : }
128 : }
129 :
130 0 : for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) {
131 0 : rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
132 0 : if (rch->type == CMS_REVCHOICE_OTHER) {
133 0 : if (sd->version < 5)
134 0 : sd->version = 5;
135 : }
136 : }
137 :
138 0 : if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
139 0 : && (sd->version < 3))
140 0 : sd->version = 3;
141 :
142 0 : for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
143 0 : si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
144 0 : if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
145 0 : if (si->version < 3)
146 0 : si->version = 3;
147 0 : if (sd->version < 3)
148 0 : sd->version = 3;
149 0 : } else if (si->version < 1)
150 0 : si->version = 1;
151 : }
152 :
153 0 : if (sd->version < 1)
154 0 : sd->version = 1;
155 :
156 0 : }
157 :
158 : /* Copy an existing messageDigest value */
159 :
160 0 : static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
161 : {
162 : STACK_OF(CMS_SignerInfo) *sinfos;
163 : CMS_SignerInfo *sitmp;
164 : int i;
165 : sinfos = CMS_get0_SignerInfos(cms);
166 0 : for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
167 : ASN1_OCTET_STRING *messageDigest;
168 0 : sitmp = sk_CMS_SignerInfo_value(sinfos, i);
169 0 : if (sitmp == si)
170 0 : continue;
171 0 : if (CMS_signed_get_attr_count(sitmp) < 0)
172 0 : continue;
173 0 : if (OBJ_cmp(si->digestAlgorithm->algorithm,
174 0 : sitmp->digestAlgorithm->algorithm))
175 0 : continue;
176 0 : messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
177 : OBJ_nid2obj
178 : (NID_pkcs9_messageDigest),
179 : -3, V_ASN1_OCTET_STRING);
180 0 : if (!messageDigest) {
181 0 : CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
182 : CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
183 0 : return 0;
184 : }
185 :
186 0 : 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 0 : return 0;
192 : }
193 0 : CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
194 0 : return 0;
195 : }
196 :
197 0 : int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
198 : {
199 0 : switch (type) {
200 : case CMS_SIGNERINFO_ISSUER_SERIAL:
201 0 : if (!cms_set1_ias(&sid->d.issuerAndSerialNumber, cert))
202 : return 0;
203 : break;
204 :
205 : case CMS_SIGNERINFO_KEYIDENTIFIER:
206 0 : if (!cms_set1_keyid(&sid->d.subjectKeyIdentifier, cert))
207 : return 0;
208 : break;
209 :
210 : default:
211 0 : CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
212 0 : return 0;
213 : }
214 :
215 0 : sid->type = type;
216 :
217 0 : return 1;
218 : }
219 :
220 0 : int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
221 : ASN1_OCTET_STRING **keyid,
222 : X509_NAME **issuer,
223 : ASN1_INTEGER **sno)
224 : {
225 0 : if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) {
226 0 : if (issuer)
227 0 : *issuer = sid->d.issuerAndSerialNumber->issuer;
228 0 : if (sno)
229 0 : *sno = sid->d.issuerAndSerialNumber->serialNumber;
230 0 : } else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
231 0 : if (keyid)
232 0 : *keyid = sid->d.subjectKeyIdentifier;
233 : } else
234 : return 0;
235 : return 1;
236 : }
237 :
238 0 : int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
239 : {
240 0 : if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
241 0 : return cms_ias_cert_cmp(sid->d.issuerAndSerialNumber, cert);
242 0 : else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
243 0 : return cms_keyid_cert_cmp(sid->d.subjectKeyIdentifier, cert);
244 : else
245 : return -1;
246 : }
247 :
248 0 : static int cms_sd_asn1_ctrl(CMS_SignerInfo *si, int cmd)
249 : {
250 0 : EVP_PKEY *pkey = si->pkey;
251 : int i;
252 0 : if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
253 : return 1;
254 0 : i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_SIGN, cmd, si);
255 0 : if (i == -2) {
256 0 : CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
257 0 : return 0;
258 : }
259 0 : if (i <= 0) {
260 0 : CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_CTRL_FAILURE);
261 0 : return 0;
262 : }
263 : return 1;
264 : }
265 :
266 0 : CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
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 0 : if (!X509_check_private_key(signer, pk)) {
275 0 : CMSerr(CMS_F_CMS_ADD1_SIGNER,
276 : CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
277 0 : return NULL;
278 : }
279 0 : sd = cms_signed_data_init(cms);
280 0 : if (!sd)
281 : goto err;
282 0 : si = M_ASN1_new_of(CMS_SignerInfo);
283 0 : if (!si)
284 : goto merr;
285 0 : X509_check_purpose(signer, -1, -1);
286 :
287 0 : CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY);
288 0 : CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
289 :
290 0 : si->pkey = pk;
291 0 : si->signer = signer;
292 0 : EVP_MD_CTX_init(&si->mctx);
293 0 : si->pctx = NULL;
294 :
295 0 : if (flags & CMS_USE_KEYID) {
296 0 : si->version = 3;
297 0 : if (sd->version < 3)
298 0 : sd->version = 3;
299 : type = CMS_SIGNERINFO_KEYIDENTIFIER;
300 : } else {
301 : type = CMS_SIGNERINFO_ISSUER_SERIAL;
302 0 : si->version = 1;
303 : }
304 :
305 0 : if (!cms_set1_SignerIdentifier(si->sid, signer, type))
306 : goto err;
307 :
308 0 : if (md == NULL) {
309 : int def_nid;
310 0 : if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0)
311 : goto err;
312 0 : md = EVP_get_digestbynid(def_nid);
313 0 : if (md == NULL) {
314 0 : CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST);
315 0 : goto err;
316 : }
317 : }
318 :
319 0 : if (!md) {
320 0 : CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET);
321 0 : goto err;
322 : }
323 :
324 0 : cms_DigestAlgorithm_set(si->digestAlgorithm, md);
325 :
326 : /* See if digest is present in digestAlgorithms */
327 0 : for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
328 : ASN1_OBJECT *aoid;
329 0 : alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
330 0 : X509_ALGOR_get0(&aoid, NULL, NULL, alg);
331 0 : if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
332 : break;
333 : }
334 :
335 0 : if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) {
336 0 : alg = X509_ALGOR_new();
337 0 : if (!alg)
338 : goto merr;
339 0 : cms_DigestAlgorithm_set(alg, md);
340 0 : if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) {
341 0 : X509_ALGOR_free(alg);
342 0 : goto merr;
343 : }
344 : }
345 :
346 0 : if (!(flags & CMS_KEY_PARAM) && !cms_sd_asn1_ctrl(si, 0))
347 : goto err;
348 0 : 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 0 : if (!si->signedAttrs) {
354 0 : si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
355 0 : if (!si->signedAttrs)
356 : goto merr;
357 : }
358 :
359 0 : if (!(flags & CMS_NOSMIMECAP)) {
360 0 : STACK_OF(X509_ALGOR) *smcap = NULL;
361 0 : i = CMS_add_standard_smimecap(&smcap);
362 0 : if (i)
363 0 : i = CMS_add_smimecap(si, smcap);
364 0 : sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
365 0 : if (!i)
366 : goto merr;
367 : }
368 0 : if (flags & CMS_REUSE_DIGEST) {
369 0 : if (!cms_copy_messageDigest(cms, si))
370 : goto err;
371 0 : if (!(flags & (CMS_PARTIAL | CMS_KEY_PARAM)) &&
372 0 : !CMS_SignerInfo_sign(si))
373 : goto err;
374 : }
375 : }
376 :
377 0 : if (!(flags & CMS_NOCERTS)) {
378 : /* NB ignore -1 return for duplicate cert */
379 0 : if (!CMS_add1_cert(cms, signer))
380 : goto merr;
381 : }
382 :
383 0 : if (flags & CMS_KEY_PARAM) {
384 0 : if (flags & CMS_NOATTR) {
385 0 : si->pctx = EVP_PKEY_CTX_new(si->pkey, NULL);
386 0 : if (!si->pctx)
387 : goto err;
388 0 : if (EVP_PKEY_sign_init(si->pctx) <= 0)
389 : goto err;
390 0 : if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0)
391 : goto err;
392 0 : } else if (EVP_DigestSignInit(&si->mctx, &si->pctx, md, NULL, pk) <=
393 : 0)
394 : goto err;
395 : }
396 :
397 0 : if (!sd->signerInfos)
398 0 : sd->signerInfos = sk_CMS_SignerInfo_new_null();
399 0 : if (!sd->signerInfos || !sk_CMS_SignerInfo_push(sd->signerInfos, si))
400 : goto merr;
401 :
402 : return si;
403 :
404 : merr:
405 0 : CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
406 : err:
407 0 : if (si)
408 0 : M_ASN1_free_of(si, CMS_SignerInfo);
409 : return NULL;
410 :
411 : }
412 :
413 0 : static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
414 : {
415 : ASN1_TIME *tt;
416 : int r = 0;
417 0 : if (t)
418 : tt = t;
419 : else
420 0 : tt = X509_gmtime_adj(NULL, 0);
421 :
422 0 : if (!tt)
423 : goto merr;
424 :
425 0 : if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
426 : tt->type, tt, -1) <= 0)
427 : goto merr;
428 :
429 : r = 1;
430 :
431 : merr:
432 :
433 0 : if (!t)
434 0 : ASN1_TIME_free(tt);
435 :
436 0 : if (!r)
437 0 : CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
438 :
439 0 : return r;
440 :
441 : }
442 :
443 0 : EVP_PKEY_CTX *CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo *si)
444 : {
445 0 : return si->pctx;
446 : }
447 :
448 0 : EVP_MD_CTX *CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo *si)
449 : {
450 0 : return &si->mctx;
451 : }
452 :
453 0 : STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
454 : {
455 : CMS_SignedData *sd;
456 0 : sd = cms_get0_signed(cms);
457 0 : if (!sd)
458 : return NULL;
459 0 : return sd->signerInfos;
460 : }
461 :
462 0 : STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
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 0 : for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
470 0 : si = sk_CMS_SignerInfo_value(sinfos, i);
471 0 : if (si->signer) {
472 0 : if (!signers) {
473 0 : signers = sk_X509_new_null();
474 0 : if (!signers)
475 : return NULL;
476 : }
477 0 : if (!sk_X509_push(signers, si->signer)) {
478 0 : sk_X509_free(signers);
479 0 : return NULL;
480 : }
481 : }
482 : }
483 : return signers;
484 : }
485 :
486 0 : void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
487 : {
488 0 : if (signer) {
489 0 : CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509);
490 0 : if (si->pkey)
491 0 : EVP_PKEY_free(si->pkey);
492 0 : si->pkey = X509_get_pubkey(signer);
493 : }
494 0 : if (si->signer)
495 0 : X509_free(si->signer);
496 0 : si->signer = signer;
497 0 : }
498 :
499 0 : int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
500 : ASN1_OCTET_STRING **keyid,
501 : X509_NAME **issuer, ASN1_INTEGER **sno)
502 : {
503 0 : return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
504 : }
505 :
506 0 : int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
507 : {
508 0 : return cms_SignerIdentifier_cert_cmp(si->sid, cert);
509 : }
510 :
511 0 : int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
512 : unsigned int flags)
513 : {
514 : CMS_SignedData *sd;
515 : CMS_SignerInfo *si;
516 : CMS_CertificateChoices *cch;
517 : STACK_OF(CMS_CertificateChoices) *certs;
518 : X509 *x;
519 : int i, j;
520 : int ret = 0;
521 0 : sd = cms_get0_signed(cms);
522 0 : if (!sd)
523 : return -1;
524 0 : certs = sd->certificates;
525 0 : for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
526 0 : si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
527 0 : if (si->signer)
528 0 : continue;
529 :
530 0 : for (j = 0; j < sk_X509_num(scerts); j++) {
531 0 : x = sk_X509_value(scerts, j);
532 0 : if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
533 0 : CMS_SignerInfo_set1_signer_cert(si, x);
534 0 : ret++;
535 0 : break;
536 : }
537 : }
538 :
539 0 : if (si->signer || (flags & CMS_NOINTERN))
540 0 : continue;
541 :
542 0 : for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) {
543 0 : cch = sk_CMS_CertificateChoices_value(certs, j);
544 0 : if (cch->type != 0)
545 0 : continue;
546 0 : x = cch->d.certificate;
547 0 : if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
548 0 : CMS_SignerInfo_set1_signer_cert(si, x);
549 0 : ret++;
550 0 : break;
551 : }
552 : }
553 : }
554 : return ret;
555 : }
556 :
557 0 : void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk,
558 : X509 **signer, X509_ALGOR **pdig,
559 : X509_ALGOR **psig)
560 : {
561 0 : if (pk)
562 0 : *pk = si->pkey;
563 0 : if (signer)
564 0 : *signer = si->signer;
565 0 : if (pdig)
566 0 : *pdig = si->digestAlgorithm;
567 0 : if (psig)
568 0 : *psig = si->signatureAlgorithm;
569 0 : }
570 :
571 0 : ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si)
572 : {
573 0 : return si->signature;
574 : }
575 :
576 0 : static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
577 : CMS_SignerInfo *si, BIO *chain)
578 : {
579 : EVP_MD_CTX mctx;
580 : int r = 0;
581 : EVP_PKEY_CTX *pctx = NULL;
582 0 : EVP_MD_CTX_init(&mctx);
583 :
584 0 : if (!si->pkey) {
585 0 : CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
586 : return 0;
587 : }
588 :
589 0 : if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
590 : goto err;
591 : /* Set SignerInfo algortihm details if we used custom parametsr */
592 0 : if (si->pctx && !cms_sd_asn1_ctrl(si, 0))
593 : goto err;
594 :
595 : /*
596 : * If any signed attributes calculate and add messageDigest attribute
597 : */
598 :
599 0 : if (CMS_signed_get_attr_count(si) >= 0) {
600 0 : ASN1_OBJECT *ctype =
601 0 : cms->d.signedData->encapContentInfo->eContentType;
602 : unsigned char md[EVP_MAX_MD_SIZE];
603 : unsigned int mdlen;
604 0 : if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
605 : goto err;
606 0 : if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
607 : V_ASN1_OCTET_STRING, md, mdlen))
608 : goto err;
609 : /* Copy content type across */
610 0 : if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
611 : V_ASN1_OBJECT, ctype, -1) <= 0)
612 : goto err;
613 0 : if (!CMS_SignerInfo_sign(si))
614 : goto err;
615 0 : } else if (si->pctx) {
616 : unsigned char *sig;
617 : size_t siglen;
618 : unsigned char md[EVP_MAX_MD_SIZE];
619 : unsigned int mdlen;
620 : pctx = si->pctx;
621 0 : if (!EVP_DigestFinal_ex(&mctx, md, &mdlen))
622 : goto err;
623 0 : siglen = EVP_PKEY_size(si->pkey);
624 0 : sig = OPENSSL_malloc(siglen);
625 0 : if (!sig) {
626 0 : CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
627 : goto err;
628 : }
629 0 : if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0)
630 : goto err;
631 0 : ASN1_STRING_set0(si->signature, sig, siglen);
632 : } else {
633 : unsigned char *sig;
634 : unsigned int siglen;
635 0 : sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
636 0 : if (!sig) {
637 0 : CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
638 0 : goto err;
639 : }
640 0 : if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey)) {
641 0 : CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_SIGNFINAL_ERROR);
642 0 : OPENSSL_free(sig);
643 : goto err;
644 : }
645 0 : ASN1_STRING_set0(si->signature, sig, siglen);
646 : }
647 :
648 : r = 1;
649 :
650 : err:
651 0 : EVP_MD_CTX_cleanup(&mctx);
652 0 : if (pctx)
653 0 : EVP_PKEY_CTX_free(pctx);
654 : return r;
655 :
656 : }
657 :
658 0 : int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
659 : {
660 : STACK_OF(CMS_SignerInfo) *sinfos;
661 : CMS_SignerInfo *si;
662 : int i;
663 : sinfos = CMS_get0_SignerInfos(cms);
664 0 : for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
665 0 : si = sk_CMS_SignerInfo_value(sinfos, i);
666 0 : if (!cms_SignerInfo_content_sign(cms, si, chain))
667 : return 0;
668 : }
669 0 : cms->d.signedData->encapContentInfo->partial = 0;
670 0 : return 1;
671 : }
672 :
673 0 : int CMS_SignerInfo_sign(CMS_SignerInfo *si)
674 : {
675 0 : EVP_MD_CTX *mctx = &si->mctx;
676 : EVP_PKEY_CTX *pctx;
677 0 : unsigned char *abuf = NULL;
678 : int alen;
679 : size_t siglen;
680 : const EVP_MD *md = NULL;
681 :
682 0 : md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
683 0 : if (md == NULL)
684 : return 0;
685 :
686 0 : if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) {
687 0 : if (!cms_add1_signingTime(si, NULL))
688 : goto err;
689 : }
690 :
691 0 : if (si->pctx)
692 0 : pctx = si->pctx;
693 : else {
694 0 : EVP_MD_CTX_init(mctx);
695 0 : if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
696 : goto err;
697 : }
698 :
699 0 : if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
700 : EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0) {
701 0 : CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
702 0 : goto err;
703 : }
704 :
705 0 : alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
706 : ASN1_ITEM_rptr(CMS_Attributes_Sign));
707 0 : if (!abuf)
708 : goto err;
709 0 : if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
710 : goto err;
711 0 : if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
712 : goto err;
713 0 : OPENSSL_free(abuf);
714 0 : abuf = OPENSSL_malloc(siglen);
715 0 : if (!abuf)
716 : goto err;
717 0 : if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
718 : goto err;
719 :
720 0 : if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
721 : EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0) {
722 0 : CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
723 0 : goto err;
724 : }
725 :
726 0 : EVP_MD_CTX_cleanup(mctx);
727 :
728 0 : ASN1_STRING_set0(si->signature, abuf, siglen);
729 :
730 0 : return 1;
731 :
732 : err:
733 0 : if (abuf)
734 0 : OPENSSL_free(abuf);
735 0 : EVP_MD_CTX_cleanup(mctx);
736 0 : return 0;
737 :
738 : }
739 :
740 0 : int CMS_SignerInfo_verify(CMS_SignerInfo *si)
741 : {
742 0 : EVP_MD_CTX *mctx = &si->mctx;
743 0 : unsigned char *abuf = NULL;
744 : int alen, r = -1;
745 : const EVP_MD *md = NULL;
746 :
747 0 : if (!si->pkey) {
748 0 : CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
749 0 : return -1;
750 : }
751 :
752 0 : md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
753 0 : if (md == NULL)
754 : return -1;
755 0 : EVP_MD_CTX_init(mctx);
756 0 : if (EVP_DigestVerifyInit(mctx, &si->pctx, md, NULL, si->pkey) <= 0)
757 : goto err;
758 :
759 0 : if (!cms_sd_asn1_ctrl(si, 1))
760 : goto err;
761 :
762 0 : alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
763 : ASN1_ITEM_rptr(CMS_Attributes_Verify));
764 0 : if (!abuf)
765 : goto err;
766 0 : r = EVP_DigestVerifyUpdate(mctx, abuf, alen);
767 0 : OPENSSL_free(abuf);
768 0 : if (r <= 0) {
769 : r = -1;
770 : goto err;
771 : }
772 0 : r = EVP_DigestVerifyFinal(mctx,
773 0 : si->signature->data, si->signature->length);
774 0 : if (r <= 0)
775 0 : CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
776 : err:
777 0 : EVP_MD_CTX_cleanup(mctx);
778 0 : return r;
779 : }
780 :
781 : /* Create a chain of digest BIOs from a CMS ContentInfo */
782 :
783 0 : BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
784 : {
785 : int i;
786 : CMS_SignedData *sd;
787 : BIO *chain = NULL;
788 0 : sd = cms_get0_signed(cms);
789 0 : if (!sd)
790 : return NULL;
791 0 : if (cms->d.signedData->encapContentInfo->partial)
792 0 : cms_sd_set_version(sd);
793 0 : for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
794 : X509_ALGOR *digestAlgorithm;
795 : BIO *mdbio;
796 0 : digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
797 0 : mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
798 0 : if (!mdbio)
799 : goto err;
800 0 : if (chain)
801 0 : BIO_push(chain, mdbio);
802 : else
803 : chain = mdbio;
804 : }
805 : return chain;
806 : err:
807 0 : if (chain)
808 0 : BIO_free_all(chain);
809 : return NULL;
810 : }
811 :
812 0 : int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
813 : {
814 : ASN1_OCTET_STRING *os = NULL;
815 : EVP_MD_CTX mctx;
816 : EVP_PKEY_CTX *pkctx = NULL;
817 : int r = -1;
818 : unsigned char mval[EVP_MAX_MD_SIZE];
819 : unsigned int mlen;
820 0 : EVP_MD_CTX_init(&mctx);
821 : /* If we have any signed attributes look for messageDigest value */
822 0 : if (CMS_signed_get_attr_count(si) >= 0) {
823 0 : os = CMS_signed_get0_data_by_OBJ(si,
824 : OBJ_nid2obj(NID_pkcs9_messageDigest),
825 : -3, V_ASN1_OCTET_STRING);
826 0 : if (!os) {
827 0 : CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
828 : CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
829 0 : goto err;
830 : }
831 : }
832 :
833 0 : if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm))
834 : goto err;
835 :
836 0 : if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0) {
837 0 : CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
838 : CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
839 0 : goto err;
840 : }
841 :
842 : /* If messageDigest found compare it */
843 :
844 0 : if (os) {
845 0 : if (mlen != (unsigned int)os->length) {
846 0 : CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
847 : CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
848 0 : goto err;
849 : }
850 :
851 0 : if (memcmp(mval, os->data, mlen)) {
852 0 : CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
853 : CMS_R_VERIFICATION_FAILURE);
854 : r = 0;
855 : } else
856 : r = 1;
857 : } else {
858 0 : const EVP_MD *md = EVP_MD_CTX_md(&mctx);
859 0 : pkctx = EVP_PKEY_CTX_new(si->pkey, NULL);
860 0 : if (EVP_PKEY_verify_init(pkctx) <= 0)
861 : goto err;
862 0 : if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0)
863 : goto err;
864 0 : si->pctx = pkctx;
865 0 : if (!cms_sd_asn1_ctrl(si, 1))
866 : goto err;
867 0 : r = EVP_PKEY_verify(pkctx, si->signature->data,
868 0 : si->signature->length, mval, mlen);
869 0 : if (r <= 0) {
870 0 : CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
871 : CMS_R_VERIFICATION_FAILURE);
872 : r = 0;
873 : }
874 : }
875 :
876 : err:
877 0 : if (pkctx)
878 0 : EVP_PKEY_CTX_free(pkctx);
879 0 : EVP_MD_CTX_cleanup(&mctx);
880 0 : return r;
881 :
882 : }
883 :
884 0 : int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
885 : {
886 0 : unsigned char *smder = NULL;
887 : int smderlen, r;
888 0 : smderlen = i2d_X509_ALGORS(algs, &smder);
889 0 : if (smderlen <= 0)
890 : return 0;
891 0 : r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
892 : V_ASN1_SEQUENCE, smder, smderlen);
893 0 : OPENSSL_free(smder);
894 0 : return r;
895 : }
896 :
897 0 : int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
898 : int algnid, int keysize)
899 : {
900 : X509_ALGOR *alg;
901 : ASN1_INTEGER *key = NULL;
902 0 : if (keysize > 0) {
903 0 : key = ASN1_INTEGER_new();
904 0 : if (!key || !ASN1_INTEGER_set(key, keysize))
905 : return 0;
906 : }
907 0 : alg = X509_ALGOR_new();
908 0 : if (!alg) {
909 0 : if (key)
910 0 : ASN1_INTEGER_free(key);
911 : return 0;
912 : }
913 :
914 0 : X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
915 : key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
916 0 : if (!*algs)
917 0 : *algs = sk_X509_ALGOR_new_null();
918 0 : if (!*algs || !sk_X509_ALGOR_push(*algs, alg)) {
919 0 : X509_ALGOR_free(alg);
920 0 : return 0;
921 : }
922 : return 1;
923 : }
924 :
925 : /* Check to see if a cipher exists and if so add S/MIME capabilities */
926 :
927 0 : static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
928 : {
929 0 : if (EVP_get_cipherbynid(nid))
930 0 : return CMS_add_simple_smimecap(sk, nid, arg);
931 : return 1;
932 : }
933 :
934 0 : static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
935 : {
936 0 : if (EVP_get_digestbynid(nid))
937 0 : return CMS_add_simple_smimecap(sk, nid, arg);
938 : return 1;
939 : }
940 :
941 0 : int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
942 : {
943 0 : if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
944 0 : || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
945 0 : || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
946 0 : || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
947 0 : || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
948 0 : || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
949 0 : || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
950 0 : || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
951 0 : || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
952 0 : || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
953 : return 0;
954 : return 1;
955 : }
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