1 /* crypto/pkcs7/pk7_doit.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
61 #include <openssl/rand.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
65 #include <openssl/err.h>
67 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
69 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
71 static int PKCS7_type_is_other(PKCS7 *p7)
75 int nid = OBJ_obj2nid(p7->type);
79 case NID_pkcs7_signed:
80 case NID_pkcs7_enveloped:
81 case NID_pkcs7_signedAndEnveloped:
82 case NID_pkcs7_digest:
83 case NID_pkcs7_encrypted:
94 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
96 if (PKCS7_type_is_data(p7))
98 if (PKCS7_type_is_other(p7) && p7->d.other
99 && (p7->d.other->type == V_ASN1_OCTET_STRING))
100 return p7->d.other->value.octet_string;
104 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
108 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
109 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
113 md = EVP_get_digestbyobj(alg->algorithm);
115 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE);
119 BIO_set_md(btmp, md);
122 else if (!BIO_push(*pbio, btmp)) {
123 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
137 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
140 BIO *out = NULL, *btmp = NULL;
141 X509_ALGOR *xa = NULL;
142 const EVP_CIPHER *evp_cipher = NULL;
143 STACK_OF(X509_ALGOR) *md_sk = NULL;
144 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
145 X509_ALGOR *xalg = NULL;
146 PKCS7_RECIP_INFO *ri = NULL;
148 ASN1_OCTET_STRING *os = NULL;
151 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
155 * The content field in the PKCS7 ContentInfo is optional, but that really
156 * only applies to inner content (precisely, detached signatures).
158 * When reading content, missing outer content is therefore treated as an
161 * When creating content, PKCS7_content_new() must be called before
162 * calling this method, so a NULL p7->d is always an error.
164 if (p7->d.ptr == NULL) {
165 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
169 i = OBJ_obj2nid(p7->type);
170 p7->state = PKCS7_S_HEADER;
173 case NID_pkcs7_signed:
174 md_sk = p7->d.sign->md_algs;
175 os = PKCS7_get_octet_string(p7->d.sign->contents);
177 case NID_pkcs7_signedAndEnveloped:
178 rsk = p7->d.signed_and_enveloped->recipientinfo;
179 md_sk = p7->d.signed_and_enveloped->md_algs;
180 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
181 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
182 if (evp_cipher == NULL) {
183 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
187 case NID_pkcs7_enveloped:
188 rsk = p7->d.enveloped->recipientinfo;
189 xalg = p7->d.enveloped->enc_data->algorithm;
190 evp_cipher = p7->d.enveloped->enc_data->cipher;
191 if (evp_cipher == NULL) {
192 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
196 case NID_pkcs7_digest:
197 xa = p7->d.digest->md;
198 os = PKCS7_get_octet_string(p7->d.digest->contents);
201 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
205 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
206 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
209 if (xa && !PKCS7_bio_add_digest(&out, xa))
212 if (evp_cipher != NULL) {
213 unsigned char key[EVP_MAX_KEY_LENGTH];
214 unsigned char iv[EVP_MAX_IV_LENGTH];
220 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
221 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
224 BIO_get_cipher_ctx(btmp, &ctx);
225 keylen = EVP_CIPHER_key_length(evp_cipher);
226 ivlen = EVP_CIPHER_iv_length(evp_cipher);
227 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
229 if (RAND_pseudo_bytes(iv, ivlen) <= 0)
231 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
233 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
235 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
239 if (xalg->parameter == NULL) {
240 xalg->parameter = ASN1_TYPE_new();
241 if (xalg->parameter == NULL)
244 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
248 /* Lets do the pub key stuff :-) */
250 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
251 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
252 if (ri->cert == NULL) {
253 PKCS7err(PKCS7_F_PKCS7_DATAINIT,
254 PKCS7_R_MISSING_CERIPEND_INFO);
257 if ((pkey = X509_get_pubkey(ri->cert)) == NULL)
259 jj = EVP_PKEY_size(pkey);
264 if ((tmp = (unsigned char *)OPENSSL_malloc(max)) == NULL) {
265 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_MALLOC_FAILURE);
268 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
269 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
270 if ((pkey = X509_get_pubkey(ri->cert)) == NULL)
272 jj = EVP_PKEY_encrypt(tmp, key, keylen, pkey);
275 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_EVP_LIB);
279 if (!M_ASN1_OCTET_STRING_set(ri->enc_key, tmp, jj)) {
280 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_MALLOC_FAILURE);
286 OPENSSL_cleanse(key, keylen);
296 if (PKCS7_is_detached(p7))
297 bio = BIO_new(BIO_s_null());
298 else if (os && os->length > 0)
299 bio = BIO_new_mem_buf(os->data, os->length);
301 bio = BIO_new(BIO_s_mem());
304 BIO_set_mem_eof_return(bio, 0);
320 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
323 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
324 pcert->cert_info->issuer);
327 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
328 ri->issuer_and_serial->serial);
332 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
335 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
336 unsigned char *tmp = NULL;
338 ASN1_OCTET_STRING *data_body = NULL;
339 const EVP_MD *evp_md;
340 const EVP_CIPHER *evp_cipher = NULL;
341 EVP_CIPHER_CTX *evp_ctx = NULL;
342 X509_ALGOR *enc_alg = NULL;
343 STACK_OF(X509_ALGOR) *md_sk = NULL;
344 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
345 PKCS7_RECIP_INFO *ri = NULL;
348 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
352 if (p7->d.ptr == NULL) {
353 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
357 i = OBJ_obj2nid(p7->type);
358 p7->state = PKCS7_S_HEADER;
361 case NID_pkcs7_signed:
362 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
363 md_sk = p7->d.sign->md_algs;
365 case NID_pkcs7_signedAndEnveloped:
366 rsk = p7->d.signed_and_enveloped->recipientinfo;
367 md_sk = p7->d.signed_and_enveloped->md_algs;
368 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
369 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
370 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
371 if (evp_cipher == NULL) {
372 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
373 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
377 case NID_pkcs7_enveloped:
378 rsk = p7->d.enveloped->recipientinfo;
379 enc_alg = p7->d.enveloped->enc_data->algorithm;
380 data_body = p7->d.enveloped->enc_data->enc_data;
381 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
382 if (evp_cipher == NULL) {
383 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
384 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
389 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
393 /* We will be checking the signature */
395 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
396 xa = sk_X509_ALGOR_value(md_sk, i);
397 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
398 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
402 j = OBJ_obj2nid(xa->algorithm);
403 evp_md = EVP_get_digestbynid(j);
404 if (evp_md == NULL) {
405 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
406 PKCS7_R_UNKNOWN_DIGEST_TYPE);
410 BIO_set_md(btmp, evp_md);
419 if (evp_cipher != NULL) {
421 unsigned char key[EVP_MAX_KEY_LENGTH];
422 unsigned char iv[EVP_MAX_IV_LENGTH];
428 unsigned char *tkey = NULL;
432 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
433 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
438 * It was encrypted, we need to decrypt the secret key with the
443 * Find the recipientInfo which matches the passed certificate (if
448 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
449 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
450 if (!pkcs7_cmp_ri(ri, pcert))
455 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
456 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
461 jj = EVP_PKEY_size(pkey);
462 tmp = (unsigned char *)OPENSSL_malloc(jj + 10);
464 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_MALLOC_FAILURE);
468 /* If we haven't got a certificate try each ri in turn */
472 * Temporary storage in case EVP_PKEY_decrypt overwrites output
476 tmp2 = OPENSSL_malloc(jj);
481 * Always attempt to decrypt all cases to avoid leaking timing
482 * information about a successful decrypt.
484 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
486 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
487 tret = EVP_PKEY_decrypt(tmp2,
488 M_ASN1_STRING_data(ri->enc_key),
489 M_ASN1_STRING_length(ri->enc_key),
492 memcpy(tmp, tmp2, tret);
493 OPENSSL_cleanse(tmp2, tret);
500 jj = EVP_PKEY_decrypt(tmp,
501 M_ASN1_STRING_data(ri->enc_key),
502 M_ASN1_STRING_length(ri->enc_key), pkey);
507 BIO_get_cipher_ctx(etmp, &evp_ctx);
508 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
510 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
512 /* Generate random key to counter MMA */
513 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
514 tkey = OPENSSL_malloc(tkeylen);
517 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
519 /* If we have no key use random key */
529 * Some S/MIME clients don't use the same key and effective key
530 * length. The key length is determined by the size of the
533 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj)) {
534 /* As MMA defence use random key instead */
535 OPENSSL_cleanse(tmp, jj);
543 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, tmp, NULL, 0) <= 0)
546 OPENSSL_cleanse(tmp, jj);
549 OPENSSL_cleanse(tkey, tkeylen);
560 if (PKCS7_is_detached(p7) || (in_bio != NULL)) {
564 bio = BIO_new(BIO_s_mem());
566 * We need to set this so that when we have read all the data, the
567 * encrypt BIO, if present, will read EOF and encode the last few
570 BIO_set_mem_eof_return(bio, 0);
572 if (data_body->length > 0)
573 BIO_write(bio, (char *)data_body->data, data_body->length);
575 if (data_body->length > 0)
576 bio = BIO_new_mem_buf(data_body->data, data_body->length);
578 bio = BIO_new(BIO_s_mem());
579 BIO_set_mem_eof_return(bio, 0);
605 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
608 bio = BIO_find_type(bio, BIO_TYPE_MD);
610 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
611 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
614 BIO_get_md_ctx(bio, pmd);
616 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
619 if (EVP_MD_CTX_type(*pmd) == nid)
626 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
631 BUF_MEM *buf_mem = NULL;
633 PKCS7_SIGNER_INFO *si;
634 EVP_MD_CTX *mdc, ctx_tmp;
635 STACK_OF(X509_ATTRIBUTE) *sk;
636 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
637 ASN1_OCTET_STRING *os = NULL;
640 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
644 if (p7->d.ptr == NULL) {
645 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
649 EVP_MD_CTX_init(&ctx_tmp);
650 i = OBJ_obj2nid(p7->type);
651 p7->state = PKCS7_S_HEADER;
654 case NID_pkcs7_signedAndEnveloped:
655 /* XXXXXXXXXXXXXXXX */
656 si_sk = p7->d.signed_and_enveloped->signer_info;
657 if (!(os = M_ASN1_OCTET_STRING_new())) {
658 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
661 p7->d.signed_and_enveloped->enc_data->enc_data = os;
663 case NID_pkcs7_enveloped:
664 /* XXXXXXXXXXXXXXXX */
665 if (!(os = M_ASN1_OCTET_STRING_new())) {
666 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
669 p7->d.enveloped->enc_data->enc_data = os;
671 case NID_pkcs7_signed:
672 si_sk = p7->d.sign->signer_info;
673 os = PKCS7_get_octet_string(p7->d.sign->contents);
674 /* If detached data then the content is excluded */
675 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
676 M_ASN1_OCTET_STRING_free(os);
678 p7->d.sign->contents->d.data = NULL;
682 case NID_pkcs7_digest:
683 os = PKCS7_get_octet_string(p7->d.digest->contents);
684 /* If detached data then the content is excluded */
685 if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
686 M_ASN1_OCTET_STRING_free(os);
688 p7->d.digest->contents->d.data = NULL;
695 if ((buf = BUF_MEM_new()) == NULL) {
696 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_BIO_LIB);
699 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
700 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
701 if (si->pkey == NULL)
704 j = OBJ_obj2nid(si->digest_alg->algorithm);
708 btmp = PKCS7_find_digest(&mdc, btmp, j);
714 * We now have the EVP_MD_CTX, lets do the signing.
716 EVP_MD_CTX_copy_ex(&ctx_tmp, mdc);
717 if (!BUF_MEM_grow_clean(buf, EVP_PKEY_size(si->pkey))) {
718 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_BIO_LIB);
725 * If there are attributes, we add the digest attribute and only
726 * sign the attributes
728 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
729 unsigned char md_data[EVP_MAX_MD_SIZE], *abuf = NULL;
730 unsigned int md_len, alen;
731 ASN1_OCTET_STRING *digest;
732 ASN1_UTCTIME *sign_time;
733 const EVP_MD *md_tmp;
735 /* Add signing time if not already present */
736 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
737 if (!(sign_time = X509_gmtime_adj(NULL, 0))) {
738 PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
739 ERR_R_MALLOC_FAILURE);
742 if (!PKCS7_add_signed_attribute(si,
743 NID_pkcs9_signingTime,
746 M_ASN1_UTCTIME_free(sign_time);
752 md_tmp = EVP_MD_CTX_md(&ctx_tmp);
753 EVP_DigestFinal_ex(&ctx_tmp, md_data, &md_len);
754 if (!(digest = M_ASN1_OCTET_STRING_new())) {
755 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
758 if (!M_ASN1_OCTET_STRING_set(digest, md_data, md_len)) {
759 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
760 M_ASN1_OCTET_STRING_free(digest);
763 if (!PKCS7_add_signed_attribute(si,
764 NID_pkcs9_messageDigest,
765 V_ASN1_OCTET_STRING, digest))
767 M_ASN1_OCTET_STRING_free(digest);
771 /* Now sign the attributes */
772 EVP_SignInit_ex(&ctx_tmp, md_tmp, NULL);
773 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
774 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
777 EVP_SignUpdate(&ctx_tmp, abuf, alen);
780 #ifndef OPENSSL_NO_DSA
781 if (si->pkey->type == EVP_PKEY_DSA)
782 ctx_tmp.digest = EVP_dss1();
784 #ifndef OPENSSL_NO_ECDSA
785 if (si->pkey->type == EVP_PKEY_EC)
786 ctx_tmp.digest = EVP_ecdsa();
789 if (!EVP_SignFinal(&ctx_tmp, (unsigned char *)buf->data,
790 (unsigned int *)&buf->length, si->pkey)) {
791 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
794 if (!ASN1_STRING_set(si->enc_digest,
795 (unsigned char *)buf->data, buf->length)) {
796 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_ASN1_LIB);
800 } else if (i == NID_pkcs7_digest) {
801 unsigned char md_data[EVP_MAX_MD_SIZE];
803 if (!PKCS7_find_digest(&mdc, bio,
804 OBJ_obj2nid(p7->d.digest->md->algorithm)))
806 EVP_DigestFinal_ex(mdc, md_data, &md_len);
807 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
810 if (!PKCS7_is_detached(p7)) {
812 * NOTE(emilia): I think we only reach os == NULL here because detached
813 * digested data support is broken.
817 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
819 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
822 BIO_get_mem_ptr(btmp, &buf_mem);
824 * Mark the BIO read only then we can use its copy of the data
825 * instead of making an extra copy.
827 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
828 BIO_set_mem_eof_return(btmp, 0);
829 os->data = (unsigned char *)buf_mem->data;
830 os->length = buf_mem->length;
832 M_ASN1_OCTET_STRING_set(os,
833 (unsigned char *)buf_mem->data,
839 EVP_MD_CTX_cleanup(&ctx_tmp);
845 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
846 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
848 PKCS7_ISSUER_AND_SERIAL *ias;
850 STACK_OF(X509) *cert;
854 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
858 if (p7->d.ptr == NULL) {
859 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
863 if (PKCS7_type_is_signed(p7)) {
864 cert = p7->d.sign->cert;
865 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
866 cert = p7->d.signed_and_enveloped->cert;
868 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
871 /* XXXXXXXXXXXXXXXXXXXXXXX */
872 ias = si->issuer_and_serial;
874 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
876 /* were we able to find the cert in passed to us */
878 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
879 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
884 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
885 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
888 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
889 i = X509_verify_cert(ctx);
891 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
892 X509_STORE_CTX_cleanup(ctx);
895 X509_STORE_CTX_cleanup(ctx);
897 return PKCS7_signatureVerify(bio, p7, si, x509);
902 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
905 ASN1_OCTET_STRING *os;
906 EVP_MD_CTX mdc_tmp, *mdc;
909 STACK_OF(X509_ATTRIBUTE) *sk;
913 EVP_MD_CTX_init(&mdc_tmp);
915 if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
916 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
920 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
924 if ((btmp == NULL) ||
925 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
926 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
927 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
930 BIO_get_md_ctx(btmp, &mdc);
932 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
935 if (EVP_MD_CTX_type(mdc) == md_type)
938 * Workaround for some broken clients that put the signature OID
939 * instead of the digest OID in digest_alg->algorithm
941 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
943 btmp = BIO_next(btmp);
947 * mdc is the digest ctx that we want, unless there are attributes, in
948 * which case the digest is the signed attributes
950 EVP_MD_CTX_copy_ex(&mdc_tmp, mdc);
953 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
954 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
955 unsigned int md_len, alen;
956 ASN1_OCTET_STRING *message_digest;
958 EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len);
959 message_digest = PKCS7_digest_from_attributes(sk);
960 if (!message_digest) {
961 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
962 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
965 if ((message_digest->length != (int)md_len) ||
966 (memcmp(message_digest->data, md_dat, md_len))) {
970 for (ii = 0; ii < message_digest->length; ii++)
971 printf("%02X", message_digest->data[ii]);
973 for (ii = 0; ii < md_len; ii++)
974 printf("%02X", md_dat[ii]);
978 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
983 EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL);
985 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
986 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
987 EVP_VerifyUpdate(&mdc_tmp, abuf, alen);
993 pkey = X509_get_pubkey(x509);
998 #ifndef OPENSSL_NO_DSA
999 if (pkey->type == EVP_PKEY_DSA)
1000 mdc_tmp.digest = EVP_dss1();
1002 #ifndef OPENSSL_NO_ECDSA
1003 if (pkey->type == EVP_PKEY_EC)
1004 mdc_tmp.digest = EVP_ecdsa();
1007 i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
1008 EVP_PKEY_free(pkey);
1010 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1016 EVP_MD_CTX_cleanup(&mdc_tmp);
1020 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1022 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1023 PKCS7_RECIP_INFO *ri;
1026 i = OBJ_obj2nid(p7->type);
1027 if (i != NID_pkcs7_signedAndEnveloped)
1029 if (p7->d.signed_and_enveloped == NULL)
1031 rsk = p7->d.signed_and_enveloped->recipientinfo;
1034 ri = sk_PKCS7_RECIP_INFO_value(rsk, 0);
1035 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1037 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1038 return (ri->issuer_and_serial);
1041 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1043 return (get_attribute(si->auth_attr, nid));
1046 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1048 return (get_attribute(si->unauth_attr, nid));
1051 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1057 o = OBJ_nid2obj(nid);
1060 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1061 xa = sk_X509_ATTRIBUTE_value(sk, i);
1062 if (OBJ_cmp(xa->object, o) == 0) {
1063 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1064 return (sk_ASN1_TYPE_value(xa->value.set, 0));
1072 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1075 if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest)))
1077 return astype->value.octet_string;
1080 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1081 STACK_OF(X509_ATTRIBUTE) *sk)
1085 if (p7si->auth_attr != NULL)
1086 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
1087 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1088 if (p7si->auth_attr == NULL)
1090 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1091 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1092 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1100 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1101 STACK_OF(X509_ATTRIBUTE) *sk)
1105 if (p7si->unauth_attr != NULL)
1106 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
1107 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1108 if (p7si->unauth_attr == NULL)
1110 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1111 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1112 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1120 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1123 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1126 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1129 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1132 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1135 X509_ATTRIBUTE *attr = NULL;
1138 if (!(*sk = sk_X509_ATTRIBUTE_new_null()))
1141 if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value)))
1143 if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1144 X509_ATTRIBUTE_free(attr);
1150 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1151 attr = sk_X509_ATTRIBUTE_value(*sk, i);
1152 if (OBJ_obj2nid(attr->object) == nid) {
1153 X509_ATTRIBUTE_free(attr);
1154 attr = X509_ATTRIBUTE_create(nid, atrtype, value);
1157 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1158 X509_ATTRIBUTE_free(attr);