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 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
138 unsigned char *key, int keylen)
140 EVP_PKEY_CTX *pctx = NULL;
141 EVP_PKEY *pkey = NULL;
142 unsigned char *ek = NULL;
146 pkey = X509_get_pubkey(ri->cert);
151 pctx = EVP_PKEY_CTX_new(pkey, NULL);
155 if (EVP_PKEY_encrypt_init(pctx) <= 0)
158 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
159 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
160 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
164 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
167 ek = OPENSSL_malloc(eklen);
170 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
174 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
177 ASN1_STRING_set0(ri->enc_key, ek, eklen);
186 EVP_PKEY_CTX_free(pctx);
193 static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
194 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
196 EVP_PKEY_CTX *pctx = NULL;
197 unsigned char *ek = NULL;
202 pctx = EVP_PKEY_CTX_new(pkey, NULL);
206 if (EVP_PKEY_decrypt_init(pctx) <= 0)
209 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
210 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
211 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
215 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
216 ri->enc_key->data, ri->enc_key->length) <= 0)
219 ek = OPENSSL_malloc(eklen);
222 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
226 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
227 ri->enc_key->data, ri->enc_key->length) <= 0) {
229 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
236 OPENSSL_cleanse(*pek, *peklen);
245 EVP_PKEY_CTX_free(pctx);
252 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
255 BIO *out = NULL, *btmp = NULL;
256 X509_ALGOR *xa = NULL;
257 const EVP_CIPHER *evp_cipher = NULL;
258 STACK_OF(X509_ALGOR) *md_sk = NULL;
259 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
260 X509_ALGOR *xalg = NULL;
261 PKCS7_RECIP_INFO *ri = NULL;
262 ASN1_OCTET_STRING *os = NULL;
265 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
269 * The content field in the PKCS7 ContentInfo is optional, but that really
270 * only applies to inner content (precisely, detached signatures).
272 * When reading content, missing outer content is therefore treated as an
275 * When creating content, PKCS7_content_new() must be called before
276 * calling this method, so a NULL p7->d is always an error.
278 if (p7->d.ptr == NULL) {
279 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
283 i = OBJ_obj2nid(p7->type);
284 p7->state = PKCS7_S_HEADER;
287 case NID_pkcs7_signed:
288 md_sk = p7->d.sign->md_algs;
289 os = PKCS7_get_octet_string(p7->d.sign->contents);
291 case NID_pkcs7_signedAndEnveloped:
292 rsk = p7->d.signed_and_enveloped->recipientinfo;
293 md_sk = p7->d.signed_and_enveloped->md_algs;
294 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
295 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
296 if (evp_cipher == NULL) {
297 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
301 case NID_pkcs7_enveloped:
302 rsk = p7->d.enveloped->recipientinfo;
303 xalg = p7->d.enveloped->enc_data->algorithm;
304 evp_cipher = p7->d.enveloped->enc_data->cipher;
305 if (evp_cipher == NULL) {
306 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
310 case NID_pkcs7_digest:
311 xa = p7->d.digest->md;
312 os = PKCS7_get_octet_string(p7->d.digest->contents);
317 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
321 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
322 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
325 if (xa && !PKCS7_bio_add_digest(&out, xa))
328 if (evp_cipher != NULL) {
329 unsigned char key[EVP_MAX_KEY_LENGTH];
330 unsigned char iv[EVP_MAX_IV_LENGTH];
334 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
335 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
338 BIO_get_cipher_ctx(btmp, &ctx);
339 keylen = EVP_CIPHER_key_length(evp_cipher);
340 ivlen = EVP_CIPHER_iv_length(evp_cipher);
341 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
343 if (RAND_pseudo_bytes(iv, ivlen) <= 0)
345 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
347 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
349 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
353 if (xalg->parameter == NULL) {
354 xalg->parameter = ASN1_TYPE_new();
355 if (xalg->parameter == NULL)
358 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
362 /* Lets do the pub key stuff :-) */
363 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
364 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
365 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
368 OPENSSL_cleanse(key, keylen);
378 if (PKCS7_is_detached(p7))
379 bio = BIO_new(BIO_s_null());
380 else if (os && os->length > 0)
381 bio = BIO_new_mem_buf(os->data, os->length);
383 bio = BIO_new(BIO_s_mem());
386 BIO_set_mem_eof_return(bio, 0);
405 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
408 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
409 pcert->cert_info->issuer);
412 return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
413 ri->issuer_and_serial->serial);
417 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
420 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
422 ASN1_OCTET_STRING *data_body = NULL;
423 const EVP_MD *evp_md;
424 const EVP_CIPHER *evp_cipher = NULL;
425 EVP_CIPHER_CTX *evp_ctx = NULL;
426 X509_ALGOR *enc_alg = NULL;
427 STACK_OF(X509_ALGOR) *md_sk = NULL;
428 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
429 PKCS7_RECIP_INFO *ri = NULL;
430 unsigned char *ek = NULL, *tkey = NULL;
431 int eklen = 0, tkeylen = 0;
434 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
438 if (p7->d.ptr == NULL) {
439 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
443 i = OBJ_obj2nid(p7->type);
444 p7->state = PKCS7_S_HEADER;
447 case NID_pkcs7_signed:
449 * p7->d.sign->contents is a PKCS7 structure consisting of a contentType
450 * field and optional content.
451 * data_body is NULL if that structure has no (=detached) content
452 * or if the contentType is wrong (i.e., not "data").
454 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
455 if (!PKCS7_is_detached(p7) && data_body == NULL) {
456 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
457 PKCS7_R_INVALID_SIGNED_DATA_TYPE);
460 md_sk = p7->d.sign->md_algs;
462 case NID_pkcs7_signedAndEnveloped:
463 rsk = p7->d.signed_and_enveloped->recipientinfo;
464 md_sk = p7->d.signed_and_enveloped->md_algs;
465 /* data_body is NULL if the optional EncryptedContent is missing. */
466 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
467 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
468 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
469 if (evp_cipher == NULL) {
470 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
471 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
475 case NID_pkcs7_enveloped:
476 rsk = p7->d.enveloped->recipientinfo;
477 enc_alg = p7->d.enveloped->enc_data->algorithm;
478 /* data_body is NULL if the optional EncryptedContent is missing. */
479 data_body = p7->d.enveloped->enc_data->enc_data;
480 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
481 if (evp_cipher == NULL) {
482 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
483 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
488 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
492 /* Detached content must be supplied via in_bio instead. */
493 if (data_body == NULL && in_bio == NULL) {
494 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
498 /* We will be checking the signature */
500 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
501 xa = sk_X509_ALGOR_value(md_sk, i);
502 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
503 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
507 j = OBJ_obj2nid(xa->algorithm);
508 evp_md = EVP_get_digestbynid(j);
509 if (evp_md == NULL) {
510 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
511 PKCS7_R_UNKNOWN_DIGEST_TYPE);
515 BIO_set_md(btmp, evp_md);
524 if (evp_cipher != NULL) {
526 unsigned char key[EVP_MAX_KEY_LENGTH];
527 unsigned char iv[EVP_MAX_IV_LENGTH];
534 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
535 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
540 * It was encrypted, we need to decrypt the secret key with the
545 * Find the recipientInfo which matches the passed certificate (if
550 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
551 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
552 if (!pkcs7_cmp_ri(ri, pcert))
557 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
558 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
563 /* If we haven't got a certificate try each ri in turn */
566 * Always attempt to decrypt all rinfo even after sucess as a
567 * defence against MMA timing attacks.
569 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
570 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
572 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
577 /* Only exit on fatal errors, not decrypt failure */
578 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
584 BIO_get_cipher_ctx(etmp, &evp_ctx);
585 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
587 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
589 /* Generate random key as MMA defence */
590 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
591 tkey = OPENSSL_malloc(tkeylen);
594 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
602 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
604 * Some S/MIME clients don't use the same key and effective key
605 * length. The key length is determined by the size of the
608 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
609 /* Use random key as MMA defence */
610 OPENSSL_cleanse(ek, eklen);
617 /* Clear errors so we don't leak information useful in MMA */
619 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
623 OPENSSL_cleanse(ek, eklen);
628 OPENSSL_cleanse(tkey, tkeylen);
640 if (in_bio != NULL) {
644 bio = BIO_new(BIO_s_mem());
646 * We need to set this so that when we have read all the data, the
647 * encrypt BIO, if present, will read EOF and encode the last few
650 BIO_set_mem_eof_return(bio, 0);
652 if (data_body->length > 0)
653 BIO_write(bio, (char *)data_body->data, data_body->length);
655 if (data_body->length > 0)
656 bio = BIO_new_mem_buf(data_body->data, data_body->length);
658 bio = BIO_new(BIO_s_mem());
659 BIO_set_mem_eof_return(bio, 0);
671 OPENSSL_cleanse(ek, eklen);
675 OPENSSL_cleanse(tkey, tkeylen);
691 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
694 bio = BIO_find_type(bio, BIO_TYPE_MD);
696 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
697 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
700 BIO_get_md_ctx(bio, pmd);
702 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
705 if (EVP_MD_CTX_type(*pmd) == nid)
712 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
714 unsigned char md_data[EVP_MAX_MD_SIZE];
717 /* Add signing time if not already present */
718 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
719 if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
720 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
726 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
727 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
730 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
731 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
735 /* Now sign the attributes */
736 if (!PKCS7_SIGNER_INFO_sign(si))
742 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
747 PKCS7_SIGNER_INFO *si;
748 EVP_MD_CTX *mdc, ctx_tmp;
749 STACK_OF(X509_ATTRIBUTE) *sk;
750 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
751 ASN1_OCTET_STRING *os = NULL;
754 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
758 if (p7->d.ptr == NULL) {
759 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
763 EVP_MD_CTX_init(&ctx_tmp);
764 i = OBJ_obj2nid(p7->type);
765 p7->state = PKCS7_S_HEADER;
771 case NID_pkcs7_signedAndEnveloped:
772 /* XXXXXXXXXXXXXXXX */
773 si_sk = p7->d.signed_and_enveloped->signer_info;
774 os = p7->d.signed_and_enveloped->enc_data->enc_data;
776 os = M_ASN1_OCTET_STRING_new();
778 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
781 p7->d.signed_and_enveloped->enc_data->enc_data = os;
784 case NID_pkcs7_enveloped:
785 /* XXXXXXXXXXXXXXXX */
786 os = p7->d.enveloped->enc_data->enc_data;
788 os = M_ASN1_OCTET_STRING_new();
790 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
793 p7->d.enveloped->enc_data->enc_data = os;
796 case NID_pkcs7_signed:
797 si_sk = p7->d.sign->signer_info;
798 os = PKCS7_get_octet_string(p7->d.sign->contents);
799 /* If detached data then the content is excluded */
800 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
801 M_ASN1_OCTET_STRING_free(os);
803 p7->d.sign->contents->d.data = NULL;
807 case NID_pkcs7_digest:
808 os = PKCS7_get_octet_string(p7->d.digest->contents);
809 /* If detached data then the content is excluded */
810 if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
811 M_ASN1_OCTET_STRING_free(os);
813 p7->d.digest->contents->d.data = NULL;
818 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
823 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
824 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
825 if (si->pkey == NULL)
828 j = OBJ_obj2nid(si->digest_alg->algorithm);
832 btmp = PKCS7_find_digest(&mdc, btmp, j);
838 * We now have the EVP_MD_CTX, lets do the signing.
840 if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc))
846 * If there are attributes, we add the digest attribute and only
847 * sign the attributes
849 if (sk_X509_ATTRIBUTE_num(sk) > 0) {
850 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
853 unsigned char *abuf = NULL;
854 unsigned int abuflen;
855 abuflen = EVP_PKEY_size(si->pkey);
856 abuf = OPENSSL_malloc(abuflen);
860 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) {
861 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
864 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
867 } else if (i == NID_pkcs7_digest) {
868 unsigned char md_data[EVP_MAX_MD_SIZE];
870 if (!PKCS7_find_digest(&mdc, bio,
871 OBJ_obj2nid(p7->d.digest->md->algorithm)))
873 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
875 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
878 if (!PKCS7_is_detached(p7)) {
880 * NOTE(emilia): I think we only reach os == NULL here because detached
881 * digested data support is broken.
885 if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
888 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
890 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
893 contlen = BIO_get_mem_data(btmp, &cont);
895 * Mark the BIO read only then we can use its copy of the data
896 * instead of making an extra copy.
898 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
899 BIO_set_mem_eof_return(btmp, 0);
900 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
905 EVP_MD_CTX_cleanup(&ctx_tmp);
909 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
913 unsigned char *abuf = NULL;
916 const EVP_MD *md = NULL;
918 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
922 EVP_MD_CTX_init(&mctx);
923 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
926 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
927 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
928 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
932 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
933 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
936 if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
940 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
942 abuf = OPENSSL_malloc(siglen);
945 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
948 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
949 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
950 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
954 EVP_MD_CTX_cleanup(&mctx);
956 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
963 EVP_MD_CTX_cleanup(&mctx);
968 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
969 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
971 PKCS7_ISSUER_AND_SERIAL *ias;
973 STACK_OF(X509) *cert;
977 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
981 if (p7->d.ptr == NULL) {
982 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
986 if (PKCS7_type_is_signed(p7)) {
987 cert = p7->d.sign->cert;
988 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
989 cert = p7->d.signed_and_enveloped->cert;
991 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
994 /* XXXXXXXXXXXXXXXXXXXXXXX */
995 ias = si->issuer_and_serial;
997 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
999 /* were we able to find the cert in passed to us */
1001 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
1002 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
1007 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
1008 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
1011 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
1012 i = X509_verify_cert(ctx);
1014 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
1015 X509_STORE_CTX_cleanup(ctx);
1018 X509_STORE_CTX_cleanup(ctx);
1020 return PKCS7_signatureVerify(bio, p7, si, x509);
1025 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
1028 ASN1_OCTET_STRING *os;
1029 EVP_MD_CTX mdc_tmp, *mdc;
1032 STACK_OF(X509_ATTRIBUTE) *sk;
1036 EVP_MD_CTX_init(&mdc_tmp);
1038 if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
1039 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
1043 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
1047 if ((btmp == NULL) ||
1048 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
1049 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1050 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1053 BIO_get_md_ctx(btmp, &mdc);
1055 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
1058 if (EVP_MD_CTX_type(mdc) == md_type)
1061 * Workaround for some broken clients that put the signature OID
1062 * instead of the digest OID in digest_alg->algorithm
1064 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1066 btmp = BIO_next(btmp);
1070 * mdc is the digest ctx that we want, unless there are attributes, in
1071 * which case the digest is the signed attributes
1073 if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc))
1077 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
1078 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1079 unsigned int md_len;
1081 ASN1_OCTET_STRING *message_digest;
1083 if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len))
1085 message_digest = PKCS7_digest_from_attributes(sk);
1086 if (!message_digest) {
1087 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1088 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1091 if ((message_digest->length != (int)md_len) ||
1092 (memcmp(message_digest->data, md_dat, md_len))) {
1096 for (ii = 0; ii < message_digest->length; ii++)
1097 printf("%02X", message_digest->data[ii]);
1099 for (ii = 0; ii < md_len; ii++)
1100 printf("%02X", md_dat[ii]);
1104 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1109 if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL))
1112 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1113 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1115 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1119 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1125 os = si->enc_digest;
1126 pkey = X509_get_pubkey(x509);
1132 i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
1133 EVP_PKEY_free(pkey);
1135 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1141 EVP_MD_CTX_cleanup(&mdc_tmp);
1145 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1147 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1148 PKCS7_RECIP_INFO *ri;
1151 i = OBJ_obj2nid(p7->type);
1152 if (i != NID_pkcs7_signedAndEnveloped)
1154 if (p7->d.signed_and_enveloped == NULL)
1156 rsk = p7->d.signed_and_enveloped->recipientinfo;
1159 ri = sk_PKCS7_RECIP_INFO_value(rsk, 0);
1160 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1162 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1163 return (ri->issuer_and_serial);
1166 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1168 return (get_attribute(si->auth_attr, nid));
1171 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1173 return (get_attribute(si->unauth_attr, nid));
1176 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1182 o = OBJ_nid2obj(nid);
1185 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1186 xa = sk_X509_ATTRIBUTE_value(sk, i);
1187 if (OBJ_cmp(xa->object, o) == 0) {
1188 if (!xa->single && sk_ASN1_TYPE_num(xa->value.set))
1189 return (sk_ASN1_TYPE_value(xa->value.set, 0));
1197 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1200 if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest)))
1202 return astype->value.octet_string;
1205 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1206 STACK_OF(X509_ATTRIBUTE) *sk)
1210 if (p7si->auth_attr != NULL)
1211 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
1212 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1213 if (p7si->auth_attr == NULL)
1215 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1216 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1217 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1225 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1226 STACK_OF(X509_ATTRIBUTE) *sk)
1230 if (p7si->unauth_attr != NULL)
1231 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
1232 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1233 if (p7si->unauth_attr == NULL)
1235 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1236 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1237 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1245 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1248 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1251 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1254 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1257 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1260 X509_ATTRIBUTE *attr = NULL;
1263 *sk = sk_X509_ATTRIBUTE_new_null();
1267 if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value)))
1269 if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1270 X509_ATTRIBUTE_free(attr);
1276 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1277 attr = sk_X509_ATTRIBUTE_value(*sk, i);
1278 if (OBJ_obj2nid(attr->object) == nid) {
1279 X509_ATTRIBUTE_free(attr);
1280 attr = X509_ATTRIBUTE_create(nid, atrtype, value);
1283 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1284 X509_ATTRIBUTE_free(attr);