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);
136 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
137 unsigned char *key, int keylen)
139 EVP_PKEY_CTX *pctx = NULL;
140 EVP_PKEY *pkey = NULL;
141 unsigned char *ek = NULL;
145 pkey = X509_get_pubkey(ri->cert);
150 pctx = EVP_PKEY_CTX_new(pkey, NULL);
154 if (EVP_PKEY_encrypt_init(pctx) <= 0)
157 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
158 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
159 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
163 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
166 ek = OPENSSL_malloc(eklen);
169 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
173 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
176 ASN1_STRING_set0(ri->enc_key, ek, eklen);
183 EVP_PKEY_CTX_free(pctx);
190 static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
191 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
193 EVP_PKEY_CTX *pctx = NULL;
194 unsigned char *ek = NULL;
199 pctx = EVP_PKEY_CTX_new(pkey, NULL);
203 if (EVP_PKEY_decrypt_init(pctx) <= 0)
206 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
207 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
208 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
212 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
213 ri->enc_key->data, ri->enc_key->length) <= 0)
216 ek = OPENSSL_malloc(eklen);
219 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
223 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
224 ri->enc_key->data, ri->enc_key->length) <= 0) {
226 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
232 OPENSSL_clear_free(*pek, *peklen);
237 EVP_PKEY_CTX_free(pctx);
244 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
247 BIO *out = NULL, *btmp = NULL;
248 X509_ALGOR *xa = NULL;
249 const EVP_CIPHER *evp_cipher = NULL;
250 STACK_OF(X509_ALGOR) *md_sk = NULL;
251 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
252 X509_ALGOR *xalg = NULL;
253 PKCS7_RECIP_INFO *ri = NULL;
254 ASN1_OCTET_STRING *os = NULL;
257 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
261 * The content field in the PKCS7 ContentInfo is optional, but that really
262 * only applies to inner content (precisely, detached signatures).
264 * When reading content, missing outer content is therefore treated as an
267 * When creating content, PKCS7_content_new() must be called before
268 * calling this method, so a NULL p7->d is always an error.
270 if (p7->d.ptr == NULL) {
271 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
275 i = OBJ_obj2nid(p7->type);
276 p7->state = PKCS7_S_HEADER;
279 case NID_pkcs7_signed:
280 md_sk = p7->d.sign->md_algs;
281 os = PKCS7_get_octet_string(p7->d.sign->contents);
283 case NID_pkcs7_signedAndEnveloped:
284 rsk = p7->d.signed_and_enveloped->recipientinfo;
285 md_sk = p7->d.signed_and_enveloped->md_algs;
286 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
287 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
288 if (evp_cipher == NULL) {
289 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
293 case NID_pkcs7_enveloped:
294 rsk = p7->d.enveloped->recipientinfo;
295 xalg = p7->d.enveloped->enc_data->algorithm;
296 evp_cipher = p7->d.enveloped->enc_data->cipher;
297 if (evp_cipher == NULL) {
298 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
302 case NID_pkcs7_digest:
303 xa = p7->d.digest->md;
304 os = PKCS7_get_octet_string(p7->d.digest->contents);
309 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
313 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
314 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
317 if (xa && !PKCS7_bio_add_digest(&out, xa))
320 if (evp_cipher != NULL) {
321 unsigned char key[EVP_MAX_KEY_LENGTH];
322 unsigned char iv[EVP_MAX_IV_LENGTH];
326 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
327 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
330 BIO_get_cipher_ctx(btmp, &ctx);
331 keylen = EVP_CIPHER_key_length(evp_cipher);
332 ivlen = EVP_CIPHER_iv_length(evp_cipher);
333 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
335 if (RAND_bytes(iv, ivlen) <= 0)
337 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
339 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
341 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
345 if (xalg->parameter == NULL) {
346 xalg->parameter = ASN1_TYPE_new();
347 if (xalg->parameter == NULL)
350 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
354 /* Lets do the pub key stuff :-) */
355 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
356 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
357 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
360 OPENSSL_cleanse(key, keylen);
370 if (PKCS7_is_detached(p7))
371 bio = BIO_new(BIO_s_null());
372 else if (os && os->length > 0)
373 bio = BIO_new_mem_buf(os->data, os->length);
375 bio = BIO_new(BIO_s_mem());
378 BIO_set_mem_eof_return(bio, 0);
393 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
396 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
397 pcert->cert_info->issuer);
400 return ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
401 ri->issuer_and_serial->serial);
405 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
408 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
410 ASN1_OCTET_STRING *data_body = NULL;
411 const EVP_MD *evp_md;
412 const EVP_CIPHER *evp_cipher = NULL;
413 EVP_CIPHER_CTX *evp_ctx = NULL;
414 X509_ALGOR *enc_alg = NULL;
415 STACK_OF(X509_ALGOR) *md_sk = NULL;
416 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
417 PKCS7_RECIP_INFO *ri = NULL;
418 unsigned char *ek = NULL, *tkey = NULL;
419 int eklen = 0, tkeylen = 0;
422 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
426 if (p7->d.ptr == NULL) {
427 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
431 i = OBJ_obj2nid(p7->type);
432 p7->state = PKCS7_S_HEADER;
435 case NID_pkcs7_signed:
436 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
437 if (!PKCS7_is_detached(p7) && data_body == NULL) {
438 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
439 PKCS7_R_INVALID_SIGNED_DATA_TYPE);
442 md_sk = p7->d.sign->md_algs;
444 case NID_pkcs7_signedAndEnveloped:
445 rsk = p7->d.signed_and_enveloped->recipientinfo;
446 md_sk = p7->d.signed_and_enveloped->md_algs;
447 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
448 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
449 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
450 if (evp_cipher == NULL) {
451 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
452 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
456 case NID_pkcs7_enveloped:
457 rsk = p7->d.enveloped->recipientinfo;
458 enc_alg = p7->d.enveloped->enc_data->algorithm;
459 data_body = p7->d.enveloped->enc_data->enc_data;
460 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
461 if (evp_cipher == NULL) {
462 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
463 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
468 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
472 /* We will be checking the signature */
474 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
475 xa = sk_X509_ALGOR_value(md_sk, i);
476 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
477 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
481 j = OBJ_obj2nid(xa->algorithm);
482 evp_md = EVP_get_digestbynid(j);
483 if (evp_md == NULL) {
484 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
485 PKCS7_R_UNKNOWN_DIGEST_TYPE);
489 BIO_set_md(btmp, evp_md);
498 if (evp_cipher != NULL) {
499 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
500 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
505 * It was encrypted, we need to decrypt the secret key with the
510 * Find the recipientInfo which matches the passed certificate (if
515 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
516 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
517 if (!pkcs7_cmp_ri(ri, pcert))
522 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
523 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
528 /* If we haven't got a certificate try each ri in turn */
531 * Always attempt to decrypt all rinfo even after success as a
532 * defence against MMA timing attacks.
534 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
535 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
537 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
542 /* Only exit on fatal errors, not decrypt failure */
543 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
549 BIO_get_cipher_ctx(etmp, &evp_ctx);
550 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
552 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
554 /* Generate random key as MMA defence */
555 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
556 tkey = OPENSSL_malloc(tkeylen);
559 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
567 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
569 * Some S/MIME clients don't use the same key and effective key
570 * length. The key length is determined by the size of the
573 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
574 /* Use random key as MMA defence */
575 OPENSSL_clear_free(ek, eklen);
581 /* Clear errors so we don't leak information useful in MMA */
583 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
586 OPENSSL_clear_free(ek, eklen);
588 OPENSSL_clear_free(tkey, tkeylen);
597 if (PKCS7_is_detached(p7) || (in_bio != NULL)) {
600 if (data_body->length > 0)
601 bio = BIO_new_mem_buf(data_body->data, data_body->length);
603 bio = BIO_new(BIO_s_mem());
604 BIO_set_mem_eof_return(bio, 0);
614 OPENSSL_clear_free(ek, eklen);
615 OPENSSL_clear_free(tkey, tkeylen);
623 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
626 bio = BIO_find_type(bio, BIO_TYPE_MD);
628 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
629 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
632 BIO_get_md_ctx(bio, pmd);
634 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
637 if (EVP_MD_CTX_type(*pmd) == nid)
644 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
646 unsigned char md_data[EVP_MAX_MD_SIZE];
649 /* Add signing time if not already present */
650 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
651 if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
652 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
658 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
659 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
662 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
663 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
667 /* Now sign the attributes */
668 if (!PKCS7_SIGNER_INFO_sign(si))
674 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
679 PKCS7_SIGNER_INFO *si;
680 EVP_MD_CTX *mdc, ctx_tmp;
681 STACK_OF(X509_ATTRIBUTE) *sk;
682 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
683 ASN1_OCTET_STRING *os = NULL;
686 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
690 if (p7->d.ptr == NULL) {
691 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
695 EVP_MD_CTX_init(&ctx_tmp);
696 i = OBJ_obj2nid(p7->type);
697 p7->state = PKCS7_S_HEADER;
703 case NID_pkcs7_signedAndEnveloped:
704 /* XXXXXXXXXXXXXXXX */
705 si_sk = p7->d.signed_and_enveloped->signer_info;
706 os = p7->d.signed_and_enveloped->enc_data->enc_data;
708 os = ASN1_OCTET_STRING_new();
710 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
713 p7->d.signed_and_enveloped->enc_data->enc_data = os;
716 case NID_pkcs7_enveloped:
717 /* XXXXXXXXXXXXXXXX */
718 os = p7->d.enveloped->enc_data->enc_data;
720 os = ASN1_OCTET_STRING_new();
722 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
725 p7->d.enveloped->enc_data->enc_data = os;
728 case NID_pkcs7_signed:
729 si_sk = p7->d.sign->signer_info;
730 os = PKCS7_get_octet_string(p7->d.sign->contents);
731 /* If detached data then the content is excluded */
732 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
733 ASN1_OCTET_STRING_free(os);
735 p7->d.sign->contents->d.data = NULL;
739 case NID_pkcs7_digest:
740 os = PKCS7_get_octet_string(p7->d.digest->contents);
741 /* If detached data then the content is excluded */
742 if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
743 ASN1_OCTET_STRING_free(os);
745 p7->d.digest->contents->d.data = NULL;
750 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
755 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
756 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
757 if (si->pkey == NULL)
760 j = OBJ_obj2nid(si->digest_alg->algorithm);
764 btmp = PKCS7_find_digest(&mdc, btmp, j);
770 * We now have the EVP_MD_CTX, lets do the signing.
772 if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc))
778 * If there are attributes, we add the digest attribute and only
779 * sign the attributes
781 if (sk_X509_ATTRIBUTE_num(sk) > 0) {
782 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
785 unsigned char *abuf = NULL;
786 unsigned int abuflen;
787 abuflen = EVP_PKEY_size(si->pkey);
788 abuf = OPENSSL_malloc(abuflen);
792 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) {
793 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
796 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
799 } else if (i == NID_pkcs7_digest) {
800 unsigned char md_data[EVP_MAX_MD_SIZE];
802 if (!PKCS7_find_digest(&mdc, bio,
803 OBJ_obj2nid(p7->d.digest->md->algorithm)))
805 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
807 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 if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
820 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
822 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
825 contlen = BIO_get_mem_data(btmp, &cont);
827 * Mark the BIO read only then we can use its copy of the data
828 * instead of making an extra copy.
830 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
831 BIO_set_mem_eof_return(btmp, 0);
832 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
837 EVP_MD_CTX_cleanup(&ctx_tmp);
841 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
845 unsigned char *abuf = NULL;
848 const EVP_MD *md = NULL;
850 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
854 EVP_MD_CTX_init(&mctx);
855 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
858 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
859 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
860 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
864 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
865 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
868 if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
872 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
874 abuf = OPENSSL_malloc(siglen);
877 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
880 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
881 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
882 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
886 EVP_MD_CTX_cleanup(&mctx);
888 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
895 EVP_MD_CTX_cleanup(&mctx);
900 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
901 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
903 PKCS7_ISSUER_AND_SERIAL *ias;
905 STACK_OF(X509) *cert;
909 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
913 if (p7->d.ptr == NULL) {
914 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
918 if (PKCS7_type_is_signed(p7)) {
919 cert = p7->d.sign->cert;
920 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
921 cert = p7->d.signed_and_enveloped->cert;
923 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
926 /* XXXXXXXXXXXXXXXXXXXXXXX */
927 ias = si->issuer_and_serial;
929 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
931 /* were we able to find the cert in passed to us */
933 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
934 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
939 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
940 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
943 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
944 i = X509_verify_cert(ctx);
946 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
947 X509_STORE_CTX_cleanup(ctx);
950 X509_STORE_CTX_cleanup(ctx);
952 return PKCS7_signatureVerify(bio, p7, si, x509);
957 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
960 ASN1_OCTET_STRING *os;
961 EVP_MD_CTX mdc_tmp, *mdc;
964 STACK_OF(X509_ATTRIBUTE) *sk;
968 EVP_MD_CTX_init(&mdc_tmp);
970 if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
971 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
975 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
979 if ((btmp == NULL) ||
980 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
981 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
982 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
985 BIO_get_md_ctx(btmp, &mdc);
987 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
990 if (EVP_MD_CTX_type(mdc) == md_type)
993 * Workaround for some broken clients that put the signature OID
994 * instead of the digest OID in digest_alg->algorithm
996 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
998 btmp = BIO_next(btmp);
1002 * mdc is the digest ctx that we want, unless there are attributes, in
1003 * which case the digest is the signed attributes
1005 if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc))
1009 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
1010 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1011 unsigned int md_len;
1013 ASN1_OCTET_STRING *message_digest;
1015 if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len))
1017 message_digest = PKCS7_digest_from_attributes(sk);
1018 if (!message_digest) {
1019 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1020 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1023 if ((message_digest->length != (int)md_len) ||
1024 (memcmp(message_digest->data, md_dat, md_len))) {
1025 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1030 if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL))
1033 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1034 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1036 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1040 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1046 os = si->enc_digest;
1047 pkey = X509_get_pubkey(x509);
1053 i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
1054 EVP_PKEY_free(pkey);
1056 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1062 EVP_MD_CTX_cleanup(&mdc_tmp);
1066 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1068 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1069 PKCS7_RECIP_INFO *ri;
1072 i = OBJ_obj2nid(p7->type);
1073 if (i != NID_pkcs7_signedAndEnveloped)
1075 if (p7->d.signed_and_enveloped == NULL)
1077 rsk = p7->d.signed_and_enveloped->recipientinfo;
1080 ri = sk_PKCS7_RECIP_INFO_value(rsk, 0);
1081 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1083 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1084 return (ri->issuer_and_serial);
1087 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1089 return (get_attribute(si->auth_attr, nid));
1092 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1094 return (get_attribute(si->unauth_attr, nid));
1097 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1101 idx = X509at_get_attr_by_NID(sk, nid, -1);
1102 xa = X509at_get_attr(sk, idx);
1103 return X509_ATTRIBUTE_get0_type(xa, 0);
1106 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1109 if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest)))
1111 return astype->value.octet_string;
1114 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1115 STACK_OF(X509_ATTRIBUTE) *sk)
1119 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
1120 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1121 if (p7si->auth_attr == NULL)
1123 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1124 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1125 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1133 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1134 STACK_OF(X509_ATTRIBUTE) *sk)
1138 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
1139 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1140 if (p7si->unauth_attr == NULL)
1142 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1143 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1144 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1152 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1155 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1158 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1161 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1164 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1167 X509_ATTRIBUTE *attr = NULL;
1170 *sk = sk_X509_ATTRIBUTE_new_null();
1174 if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value)))
1176 if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1177 X509_ATTRIBUTE_free(attr);
1183 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1184 attr = sk_X509_ATTRIBUTE_value(*sk, i);
1185 if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) {
1186 X509_ATTRIBUTE_free(attr);
1187 attr = X509_ATTRIBUTE_create(nid, atrtype, value);
1190 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1191 X509_ATTRIBUTE_free(attr);