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-rw-r--r--src/lib/libcrypto/cms/cms_sd.c926
1 files changed, 926 insertions, 0 deletions
diff --git a/src/lib/libcrypto/cms/cms_sd.c b/src/lib/libcrypto/cms/cms_sd.c
new file mode 100644
index 0000000000..ff2d540b6a
--- /dev/null
+++ b/src/lib/libcrypto/cms/cms_sd.c
@@ -0,0 +1,926 @@
1/*
2 * Copyright 2008-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include "internal/cryptlib.h"
11#include <openssl/asn1t.h>
12#include <openssl/pem.h>
13#include <openssl/x509.h>
14#include <openssl/x509v3.h>
15#include <openssl/err.h>
16#include <openssl/cms.h>
17#include "cms_lcl.h"
18#include "internal/asn1_int.h"
19#include "internal/evp_int.h"
20
21/* CMS SignedData Utilities */
22
23static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms)
24{
25 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) {
26 CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA);
27 return NULL;
28 }
29 return cms->d.signedData;
30}
31
32static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms)
33{
34 if (cms->d.other == NULL) {
35 cms->d.signedData = M_ASN1_new_of(CMS_SignedData);
36 if (!cms->d.signedData) {
37 CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE);
38 return NULL;
39 }
40 cms->d.signedData->version = 1;
41 cms->d.signedData->encapContentInfo->eContentType =
42 OBJ_nid2obj(NID_pkcs7_data);
43 cms->d.signedData->encapContentInfo->partial = 1;
44 ASN1_OBJECT_free(cms->contentType);
45 cms->contentType = OBJ_nid2obj(NID_pkcs7_signed);
46 return cms->d.signedData;
47 }
48 return cms_get0_signed(cms);
49}
50
51/* Just initialise SignedData e.g. for certs only structure */
52
53int CMS_SignedData_init(CMS_ContentInfo *cms)
54{
55 if (cms_signed_data_init(cms))
56 return 1;
57 else
58 return 0;
59}
60
61/* Check structures and fixup version numbers (if necessary) */
62
63static void cms_sd_set_version(CMS_SignedData *sd)
64{
65 int i;
66 CMS_CertificateChoices *cch;
67 CMS_RevocationInfoChoice *rch;
68 CMS_SignerInfo *si;
69
70 for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) {
71 cch = sk_CMS_CertificateChoices_value(sd->certificates, i);
72 if (cch->type == CMS_CERTCHOICE_OTHER) {
73 if (sd->version < 5)
74 sd->version = 5;
75 } else if (cch->type == CMS_CERTCHOICE_V2ACERT) {
76 if (sd->version < 4)
77 sd->version = 4;
78 } else if (cch->type == CMS_CERTCHOICE_V1ACERT) {
79 if (sd->version < 3)
80 sd->version = 3;
81 }
82 }
83
84 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) {
85 rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i);
86 if (rch->type == CMS_REVCHOICE_OTHER) {
87 if (sd->version < 5)
88 sd->version = 5;
89 }
90 }
91
92 if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data)
93 && (sd->version < 3))
94 sd->version = 3;
95
96 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
97 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
98 if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
99 if (si->version < 3)
100 si->version = 3;
101 if (sd->version < 3)
102 sd->version = 3;
103 } else if (si->version < 1)
104 si->version = 1;
105 }
106
107 if (sd->version < 1)
108 sd->version = 1;
109
110}
111
112/* Copy an existing messageDigest value */
113
114static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si)
115{
116 STACK_OF(CMS_SignerInfo) *sinfos;
117 CMS_SignerInfo *sitmp;
118 int i;
119 sinfos = CMS_get0_SignerInfos(cms);
120 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
121 ASN1_OCTET_STRING *messageDigest;
122 sitmp = sk_CMS_SignerInfo_value(sinfos, i);
123 if (sitmp == si)
124 continue;
125 if (CMS_signed_get_attr_count(sitmp) < 0)
126 continue;
127 if (OBJ_cmp(si->digestAlgorithm->algorithm,
128 sitmp->digestAlgorithm->algorithm))
129 continue;
130 messageDigest = CMS_signed_get0_data_by_OBJ(sitmp,
131 OBJ_nid2obj
132 (NID_pkcs9_messageDigest),
133 -3, V_ASN1_OCTET_STRING);
134 if (!messageDigest) {
135 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST,
136 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
137 return 0;
138 }
139
140 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
141 V_ASN1_OCTET_STRING,
142 messageDigest, -1))
143 return 1;
144 else
145 return 0;
146 }
147 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST);
148 return 0;
149}
150
151int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type)
152{
153 switch (type) {
154 case CMS_SIGNERINFO_ISSUER_SERIAL:
155 if (!cms_set1_ias(&sid->d.issuerAndSerialNumber, cert))
156 return 0;
157 break;
158
159 case CMS_SIGNERINFO_KEYIDENTIFIER:
160 if (!cms_set1_keyid(&sid->d.subjectKeyIdentifier, cert))
161 return 0;
162 break;
163
164 default:
165 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID);
166 return 0;
167 }
168
169 sid->type = type;
170
171 return 1;
172}
173
174int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid,
175 ASN1_OCTET_STRING **keyid,
176 X509_NAME **issuer,
177 ASN1_INTEGER **sno)
178{
179 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) {
180 if (issuer)
181 *issuer = sid->d.issuerAndSerialNumber->issuer;
182 if (sno)
183 *sno = sid->d.issuerAndSerialNumber->serialNumber;
184 } else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) {
185 if (keyid)
186 *keyid = sid->d.subjectKeyIdentifier;
187 } else
188 return 0;
189 return 1;
190}
191
192int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert)
193{
194 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL)
195 return cms_ias_cert_cmp(sid->d.issuerAndSerialNumber, cert);
196 else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER)
197 return cms_keyid_cert_cmp(sid->d.subjectKeyIdentifier, cert);
198 else
199 return -1;
200}
201
202static int cms_sd_asn1_ctrl(CMS_SignerInfo *si, int cmd)
203{
204 EVP_PKEY *pkey = si->pkey;
205 int i;
206 if (!pkey->ameth || !pkey->ameth->pkey_ctrl)
207 return 1;
208 i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_SIGN, cmd, si);
209 if (i == -2) {
210 CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
211 return 0;
212 }
213 if (i <= 0) {
214 CMSerr(CMS_F_CMS_SD_ASN1_CTRL, CMS_R_CTRL_FAILURE);
215 return 0;
216 }
217 return 1;
218}
219
220CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms,
221 X509 *signer, EVP_PKEY *pk, const EVP_MD *md,
222 unsigned int flags)
223{
224 CMS_SignedData *sd;
225 CMS_SignerInfo *si = NULL;
226 X509_ALGOR *alg;
227 int i, type;
228 if (!X509_check_private_key(signer, pk)) {
229 CMSerr(CMS_F_CMS_ADD1_SIGNER,
230 CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
231 return NULL;
232 }
233 sd = cms_signed_data_init(cms);
234 if (!sd)
235 goto err;
236 si = M_ASN1_new_of(CMS_SignerInfo);
237 if (!si)
238 goto merr;
239 /* Call for side-effect of computing hash and caching extensions */
240 X509_check_purpose(signer, -1, -1);
241
242 X509_up_ref(signer);
243 EVP_PKEY_up_ref(pk);
244
245 si->pkey = pk;
246 si->signer = signer;
247 si->mctx = EVP_MD_CTX_new();
248 si->pctx = NULL;
249
250 if (si->mctx == NULL) {
251 CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
252 goto err;
253 }
254
255 if (flags & CMS_USE_KEYID) {
256 si->version = 3;
257 if (sd->version < 3)
258 sd->version = 3;
259 type = CMS_SIGNERINFO_KEYIDENTIFIER;
260 } else {
261 type = CMS_SIGNERINFO_ISSUER_SERIAL;
262 si->version = 1;
263 }
264
265 if (!cms_set1_SignerIdentifier(si->sid, signer, type))
266 goto err;
267
268 if (md == NULL) {
269 int def_nid;
270 if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0)
271 goto err;
272 md = EVP_get_digestbynid(def_nid);
273 if (md == NULL) {
274 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST);
275 goto err;
276 }
277 }
278
279 if (!md) {
280 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET);
281 goto err;
282 }
283
284 X509_ALGOR_set_md(si->digestAlgorithm, md);
285
286 /* See if digest is present in digestAlgorithms */
287 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
288 const ASN1_OBJECT *aoid;
289 alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
290 X509_ALGOR_get0(&aoid, NULL, NULL, alg);
291 if (OBJ_obj2nid(aoid) == EVP_MD_type(md))
292 break;
293 }
294
295 if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) {
296 alg = X509_ALGOR_new();
297 if (alg == NULL)
298 goto merr;
299 X509_ALGOR_set_md(alg, md);
300 if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) {
301 X509_ALGOR_free(alg);
302 goto merr;
303 }
304 }
305
306 if (!(flags & CMS_KEY_PARAM) && !cms_sd_asn1_ctrl(si, 0))
307 goto err;
308 if (!(flags & CMS_NOATTR)) {
309 /*
310 * Initialize signed attributes structure so other attributes
311 * such as signing time etc are added later even if we add none here.
312 */
313 if (!si->signedAttrs) {
314 si->signedAttrs = sk_X509_ATTRIBUTE_new_null();
315 if (!si->signedAttrs)
316 goto merr;
317 }
318
319 if (!(flags & CMS_NOSMIMECAP)) {
320 STACK_OF(X509_ALGOR) *smcap = NULL;
321 i = CMS_add_standard_smimecap(&smcap);
322 if (i)
323 i = CMS_add_smimecap(si, smcap);
324 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
325 if (!i)
326 goto merr;
327 }
328 if (flags & CMS_REUSE_DIGEST) {
329 if (!cms_copy_messageDigest(cms, si))
330 goto err;
331 if (!(flags & (CMS_PARTIAL | CMS_KEY_PARAM)) &&
332 !CMS_SignerInfo_sign(si))
333 goto err;
334 }
335 }
336
337 if (!(flags & CMS_NOCERTS)) {
338 /* NB ignore -1 return for duplicate cert */
339 if (!CMS_add1_cert(cms, signer))
340 goto merr;
341 }
342
343 if (flags & CMS_KEY_PARAM) {
344 if (flags & CMS_NOATTR) {
345 si->pctx = EVP_PKEY_CTX_new(si->pkey, NULL);
346 if (si->pctx == NULL)
347 goto err;
348 if (EVP_PKEY_sign_init(si->pctx) <= 0)
349 goto err;
350 if (EVP_PKEY_CTX_set_signature_md(si->pctx, md) <= 0)
351 goto err;
352 } else if (EVP_DigestSignInit(si->mctx, &si->pctx, md, NULL, pk) <=
353 0)
354 goto err;
355 }
356
357 if (!sd->signerInfos)
358 sd->signerInfos = sk_CMS_SignerInfo_new_null();
359 if (!sd->signerInfos || !sk_CMS_SignerInfo_push(sd->signerInfos, si))
360 goto merr;
361
362 return si;
363
364 merr:
365 CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE);
366 err:
367 M_ASN1_free_of(si, CMS_SignerInfo);
368 return NULL;
369
370}
371
372static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t)
373{
374 ASN1_TIME *tt;
375 int r = 0;
376 if (t)
377 tt = t;
378 else
379 tt = X509_gmtime_adj(NULL, 0);
380
381 if (!tt)
382 goto merr;
383
384 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime,
385 tt->type, tt, -1) <= 0)
386 goto merr;
387
388 r = 1;
389
390 merr:
391
392 if (!t)
393 ASN1_TIME_free(tt);
394
395 if (!r)
396 CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE);
397
398 return r;
399
400}
401
402EVP_PKEY_CTX *CMS_SignerInfo_get0_pkey_ctx(CMS_SignerInfo *si)
403{
404 return si->pctx;
405}
406
407EVP_MD_CTX *CMS_SignerInfo_get0_md_ctx(CMS_SignerInfo *si)
408{
409 return si->mctx;
410}
411
412STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms)
413{
414 CMS_SignedData *sd;
415 sd = cms_get0_signed(cms);
416 if (!sd)
417 return NULL;
418 return sd->signerInfos;
419}
420
421STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms)
422{
423 STACK_OF(X509) *signers = NULL;
424 STACK_OF(CMS_SignerInfo) *sinfos;
425 CMS_SignerInfo *si;
426 int i;
427 sinfos = CMS_get0_SignerInfos(cms);
428 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
429 si = sk_CMS_SignerInfo_value(sinfos, i);
430 if (si->signer) {
431 if (!signers) {
432 signers = sk_X509_new_null();
433 if (!signers)
434 return NULL;
435 }
436 if (!sk_X509_push(signers, si->signer)) {
437 sk_X509_free(signers);
438 return NULL;
439 }
440 }
441 }
442 return signers;
443}
444
445void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer)
446{
447 if (signer) {
448 X509_up_ref(signer);
449 EVP_PKEY_free(si->pkey);
450 si->pkey = X509_get_pubkey(signer);
451 }
452 X509_free(si->signer);
453 si->signer = signer;
454}
455
456int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si,
457 ASN1_OCTET_STRING **keyid,
458 X509_NAME **issuer, ASN1_INTEGER **sno)
459{
460 return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno);
461}
462
463int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert)
464{
465 return cms_SignerIdentifier_cert_cmp(si->sid, cert);
466}
467
468int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts,
469 unsigned int flags)
470{
471 CMS_SignedData *sd;
472 CMS_SignerInfo *si;
473 CMS_CertificateChoices *cch;
474 STACK_OF(CMS_CertificateChoices) *certs;
475 X509 *x;
476 int i, j;
477 int ret = 0;
478 sd = cms_get0_signed(cms);
479 if (!sd)
480 return -1;
481 certs = sd->certificates;
482 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) {
483 si = sk_CMS_SignerInfo_value(sd->signerInfos, i);
484 if (si->signer)
485 continue;
486
487 for (j = 0; j < sk_X509_num(scerts); j++) {
488 x = sk_X509_value(scerts, j);
489 if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
490 CMS_SignerInfo_set1_signer_cert(si, x);
491 ret++;
492 break;
493 }
494 }
495
496 if (si->signer || (flags & CMS_NOINTERN))
497 continue;
498
499 for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) {
500 cch = sk_CMS_CertificateChoices_value(certs, j);
501 if (cch->type != 0)
502 continue;
503 x = cch->d.certificate;
504 if (CMS_SignerInfo_cert_cmp(si, x) == 0) {
505 CMS_SignerInfo_set1_signer_cert(si, x);
506 ret++;
507 break;
508 }
509 }
510 }
511 return ret;
512}
513
514void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk,
515 X509 **signer, X509_ALGOR **pdig,
516 X509_ALGOR **psig)
517{
518 if (pk)
519 *pk = si->pkey;
520 if (signer)
521 *signer = si->signer;
522 if (pdig)
523 *pdig = si->digestAlgorithm;
524 if (psig)
525 *psig = si->signatureAlgorithm;
526}
527
528ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si)
529{
530 return si->signature;
531}
532
533static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms,
534 CMS_SignerInfo *si, BIO *chain)
535{
536 EVP_MD_CTX *mctx = EVP_MD_CTX_new();
537 int r = 0;
538 EVP_PKEY_CTX *pctx = NULL;
539
540 if (mctx == NULL) {
541 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
542 return 0;
543 }
544
545 if (!si->pkey) {
546 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY);
547 goto err;
548 }
549
550 if (!cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm))
551 goto err;
552 /* Set SignerInfo algorithm details if we used custom parameter */
553 if (si->pctx && !cms_sd_asn1_ctrl(si, 0))
554 goto err;
555
556 /*
557 * If any signed attributes calculate and add messageDigest attribute
558 */
559
560 if (CMS_signed_get_attr_count(si) >= 0) {
561 ASN1_OBJECT *ctype =
562 cms->d.signedData->encapContentInfo->eContentType;
563 unsigned char md[EVP_MAX_MD_SIZE];
564 unsigned int mdlen;
565 if (!EVP_DigestFinal_ex(mctx, md, &mdlen))
566 goto err;
567 if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest,
568 V_ASN1_OCTET_STRING, md, mdlen))
569 goto err;
570 /* Copy content type across */
571 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType,
572 V_ASN1_OBJECT, ctype, -1) <= 0)
573 goto err;
574 if (!CMS_SignerInfo_sign(si))
575 goto err;
576 } else if (si->pctx) {
577 unsigned char *sig;
578 size_t siglen;
579 unsigned char md[EVP_MAX_MD_SIZE];
580 unsigned int mdlen;
581 pctx = si->pctx;
582 if (!EVP_DigestFinal_ex(mctx, md, &mdlen))
583 goto err;
584 siglen = EVP_PKEY_size(si->pkey);
585 sig = OPENSSL_malloc(siglen);
586 if (sig == NULL) {
587 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
588 goto err;
589 }
590 if (EVP_PKEY_sign(pctx, sig, &siglen, md, mdlen) <= 0) {
591 OPENSSL_free(sig);
592 goto err;
593 }
594 ASN1_STRING_set0(si->signature, sig, siglen);
595 } else {
596 unsigned char *sig;
597 unsigned int siglen;
598 sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey));
599 if (sig == NULL) {
600 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, ERR_R_MALLOC_FAILURE);
601 goto err;
602 }
603 if (!EVP_SignFinal(mctx, sig, &siglen, si->pkey)) {
604 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_SIGNFINAL_ERROR);
605 OPENSSL_free(sig);
606 goto err;
607 }
608 ASN1_STRING_set0(si->signature, sig, siglen);
609 }
610
611 r = 1;
612
613 err:
614 EVP_MD_CTX_free(mctx);
615 EVP_PKEY_CTX_free(pctx);
616 return r;
617
618}
619
620int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain)
621{
622 STACK_OF(CMS_SignerInfo) *sinfos;
623 CMS_SignerInfo *si;
624 int i;
625 sinfos = CMS_get0_SignerInfos(cms);
626 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
627 si = sk_CMS_SignerInfo_value(sinfos, i);
628 if (!cms_SignerInfo_content_sign(cms, si, chain))
629 return 0;
630 }
631 cms->d.signedData->encapContentInfo->partial = 0;
632 return 1;
633}
634
635int CMS_SignerInfo_sign(CMS_SignerInfo *si)
636{
637 EVP_MD_CTX *mctx = si->mctx;
638 EVP_PKEY_CTX *pctx = NULL;
639 unsigned char *abuf = NULL;
640 int alen;
641 size_t siglen;
642 const EVP_MD *md = NULL;
643
644 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
645 if (md == NULL)
646 return 0;
647
648 if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) {
649 if (!cms_add1_signingTime(si, NULL))
650 goto err;
651 }
652
653 if (si->pctx)
654 pctx = si->pctx;
655 else {
656 EVP_MD_CTX_reset(mctx);
657 if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
658 goto err;
659 si->pctx = pctx;
660 }
661
662 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
663 EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0) {
664 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
665 goto err;
666 }
667
668 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
669 ASN1_ITEM_rptr(CMS_Attributes_Sign));
670 if (!abuf)
671 goto err;
672 if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
673 goto err;
674 if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
675 goto err;
676 OPENSSL_free(abuf);
677 abuf = OPENSSL_malloc(siglen);
678 if (abuf == NULL)
679 goto err;
680 if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
681 goto err;
682
683 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
684 EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0) {
685 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR);
686 goto err;
687 }
688
689 EVP_MD_CTX_reset(mctx);
690
691 ASN1_STRING_set0(si->signature, abuf, siglen);
692
693 return 1;
694
695 err:
696 OPENSSL_free(abuf);
697 EVP_MD_CTX_reset(mctx);
698 return 0;
699
700}
701
702int CMS_SignerInfo_verify(CMS_SignerInfo *si)
703{
704 EVP_MD_CTX *mctx = NULL;
705 unsigned char *abuf = NULL;
706 int alen, r = -1;
707 const EVP_MD *md = NULL;
708
709 if (!si->pkey) {
710 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY);
711 return -1;
712 }
713
714 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm);
715 if (md == NULL)
716 return -1;
717 if (si->mctx == NULL && (si->mctx = EVP_MD_CTX_new()) == NULL) {
718 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, ERR_R_MALLOC_FAILURE);
719 return -1;
720 }
721 mctx = si->mctx;
722 if (EVP_DigestVerifyInit(mctx, &si->pctx, md, NULL, si->pkey) <= 0)
723 goto err;
724
725 if (!cms_sd_asn1_ctrl(si, 1))
726 goto err;
727
728 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs, &abuf,
729 ASN1_ITEM_rptr(CMS_Attributes_Verify));
730 if (!abuf)
731 goto err;
732 r = EVP_DigestVerifyUpdate(mctx, abuf, alen);
733 OPENSSL_free(abuf);
734 if (r <= 0) {
735 r = -1;
736 goto err;
737 }
738 r = EVP_DigestVerifyFinal(mctx,
739 si->signature->data, si->signature->length);
740 if (r <= 0)
741 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE);
742 err:
743 EVP_MD_CTX_reset(mctx);
744 return r;
745}
746
747/* Create a chain of digest BIOs from a CMS ContentInfo */
748
749BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms)
750{
751 int i;
752 CMS_SignedData *sd;
753 BIO *chain = NULL;
754 sd = cms_get0_signed(cms);
755 if (!sd)
756 return NULL;
757 if (cms->d.signedData->encapContentInfo->partial)
758 cms_sd_set_version(sd);
759 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) {
760 X509_ALGOR *digestAlgorithm;
761 BIO *mdbio;
762 digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
763 mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm);
764 if (!mdbio)
765 goto err;
766 if (chain)
767 BIO_push(chain, mdbio);
768 else
769 chain = mdbio;
770 }
771 return chain;
772 err:
773 BIO_free_all(chain);
774 return NULL;
775}
776
777int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain)
778{
779 ASN1_OCTET_STRING *os = NULL;
780 EVP_MD_CTX *mctx = EVP_MD_CTX_new();
781 EVP_PKEY_CTX *pkctx = NULL;
782 int r = -1;
783 unsigned char mval[EVP_MAX_MD_SIZE];
784 unsigned int mlen;
785
786 if (mctx == NULL) {
787 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, ERR_R_MALLOC_FAILURE);
788 goto err;
789 }
790 /* If we have any signed attributes look for messageDigest value */
791 if (CMS_signed_get_attr_count(si) >= 0) {
792 os = CMS_signed_get0_data_by_OBJ(si,
793 OBJ_nid2obj(NID_pkcs9_messageDigest),
794 -3, V_ASN1_OCTET_STRING);
795 if (!os) {
796 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
797 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE);
798 goto err;
799 }
800 }
801
802 if (!cms_DigestAlgorithm_find_ctx(mctx, chain, si->digestAlgorithm))
803 goto err;
804
805 if (EVP_DigestFinal_ex(mctx, mval, &mlen) <= 0) {
806 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
807 CMS_R_UNABLE_TO_FINALIZE_CONTEXT);
808 goto err;
809 }
810
811 /* If messageDigest found compare it */
812
813 if (os) {
814 if (mlen != (unsigned int)os->length) {
815 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
816 CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH);
817 goto err;
818 }
819
820 if (memcmp(mval, os->data, mlen)) {
821 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
822 CMS_R_VERIFICATION_FAILURE);
823 r = 0;
824 } else
825 r = 1;
826 } else {
827 const EVP_MD *md = EVP_MD_CTX_md(mctx);
828 pkctx = EVP_PKEY_CTX_new(si->pkey, NULL);
829 if (pkctx == NULL)
830 goto err;
831 if (EVP_PKEY_verify_init(pkctx) <= 0)
832 goto err;
833 if (EVP_PKEY_CTX_set_signature_md(pkctx, md) <= 0)
834 goto err;
835 si->pctx = pkctx;
836 if (!cms_sd_asn1_ctrl(si, 1))
837 goto err;
838 r = EVP_PKEY_verify(pkctx, si->signature->data,
839 si->signature->length, mval, mlen);
840 if (r <= 0) {
841 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT,
842 CMS_R_VERIFICATION_FAILURE);
843 r = 0;
844 }
845 }
846
847 err:
848 EVP_PKEY_CTX_free(pkctx);
849 EVP_MD_CTX_free(mctx);
850 return r;
851
852}
853
854int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs)
855{
856 unsigned char *smder = NULL;
857 int smderlen, r;
858 smderlen = i2d_X509_ALGORS(algs, &smder);
859 if (smderlen <= 0)
860 return 0;
861 r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities,
862 V_ASN1_SEQUENCE, smder, smderlen);
863 OPENSSL_free(smder);
864 return r;
865}
866
867int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs,
868 int algnid, int keysize)
869{
870 X509_ALGOR *alg;
871 ASN1_INTEGER *key = NULL;
872 if (keysize > 0) {
873 key = ASN1_INTEGER_new();
874 if (key == NULL || !ASN1_INTEGER_set(key, keysize))
875 return 0;
876 }
877 alg = X509_ALGOR_new();
878 if (alg == NULL) {
879 ASN1_INTEGER_free(key);
880 return 0;
881 }
882
883 X509_ALGOR_set0(alg, OBJ_nid2obj(algnid),
884 key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key);
885 if (*algs == NULL)
886 *algs = sk_X509_ALGOR_new_null();
887 if (*algs == NULL || !sk_X509_ALGOR_push(*algs, alg)) {
888 X509_ALGOR_free(alg);
889 return 0;
890 }
891 return 1;
892}
893
894/* Check to see if a cipher exists and if so add S/MIME capabilities */
895
896static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
897{
898 if (EVP_get_cipherbynid(nid))
899 return CMS_add_simple_smimecap(sk, nid, arg);
900 return 1;
901}
902
903static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg)
904{
905 if (EVP_get_digestbynid(nid))
906 return CMS_add_simple_smimecap(sk, nid, arg);
907 return 1;
908}
909
910int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap)
911{
912 if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
913 || !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
914 || !cms_add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
915 || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
916 || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
917 || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
918 || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
919 || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
920 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128)
921 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64)
922 || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1)
923 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40))
924 return 0;
925 return 1;
926}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-28 19:31:33 +0000