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);
185 EVP_PKEY_CTX_free(pctx);
192 static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
193 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
195 EVP_PKEY_CTX *pctx = NULL;
196 unsigned char *ek = NULL;
201 pctx = EVP_PKEY_CTX_new(pkey, NULL);
205 if (EVP_PKEY_decrypt_init(pctx) <= 0)
208 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
209 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
210 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
214 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
215 ri->enc_key->data, ri->enc_key->length) <= 0)
218 ek = OPENSSL_malloc(eklen);
221 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
225 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
226 ri->enc_key->data, ri->enc_key->length) <= 0) {
228 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
235 OPENSSL_cleanse(*pek, *peklen);
244 EVP_PKEY_CTX_free(pctx);
251 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
254 BIO *out = NULL, *btmp = NULL;
255 X509_ALGOR *xa = NULL;
256 const EVP_CIPHER *evp_cipher = NULL;
257 STACK_OF(X509_ALGOR) *md_sk = NULL;
258 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
259 X509_ALGOR *xalg = NULL;
260 PKCS7_RECIP_INFO *ri = NULL;
261 ASN1_OCTET_STRING *os = NULL;
264 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
268 * The content field in the PKCS7 ContentInfo is optional, but that really
269 * only applies to inner content (precisely, detached signatures).
271 * When reading content, missing outer content is therefore treated as an
274 * When creating content, PKCS7_content_new() must be called before
275 * calling this method, so a NULL p7->d is always an error.
277 if (p7->d.ptr == NULL) {
278 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
282 i = OBJ_obj2nid(p7->type);
283 p7->state = PKCS7_S_HEADER;
286 case NID_pkcs7_signed:
287 md_sk = p7->d.sign->md_algs;
288 os = PKCS7_get_octet_string(p7->d.sign->contents);
290 case NID_pkcs7_signedAndEnveloped:
291 rsk = p7->d.signed_and_enveloped->recipientinfo;
292 md_sk = p7->d.signed_and_enveloped->md_algs;
293 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
294 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
295 if (evp_cipher == NULL) {
296 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
300 case NID_pkcs7_enveloped:
301 rsk = p7->d.enveloped->recipientinfo;
302 xalg = p7->d.enveloped->enc_data->algorithm;
303 evp_cipher = p7->d.enveloped->enc_data->cipher;
304 if (evp_cipher == NULL) {
305 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
309 case NID_pkcs7_digest:
310 xa = p7->d.digest->md;
311 os = PKCS7_get_octet_string(p7->d.digest->contents);
316 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
320 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
321 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
324 if (xa && !PKCS7_bio_add_digest(&out, xa))
327 if (evp_cipher != NULL) {
328 unsigned char key[EVP_MAX_KEY_LENGTH];
329 unsigned char iv[EVP_MAX_IV_LENGTH];
333 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
334 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
337 BIO_get_cipher_ctx(btmp, &ctx);
338 keylen = EVP_CIPHER_key_length(evp_cipher);
339 ivlen = EVP_CIPHER_iv_length(evp_cipher);
340 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
342 if (RAND_bytes(iv, ivlen) <= 0)
344 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
346 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
348 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
352 if (xalg->parameter == NULL) {
353 xalg->parameter = ASN1_TYPE_new();
354 if (xalg->parameter == NULL)
357 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
361 /* Lets do the pub key stuff :-) */
362 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
363 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
364 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
367 OPENSSL_cleanse(key, keylen);
377 if (PKCS7_is_detached(p7))
378 bio = BIO_new(BIO_s_null());
379 else if (os && os->length > 0)
380 bio = BIO_new_mem_buf(os->data, os->length);
382 bio = BIO_new(BIO_s_mem());
385 BIO_set_mem_eof_return(bio, 0);
400 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
403 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
404 pcert->cert_info->issuer);
407 return ASN1_INTEGER_cmp(pcert->cert_info->serialNumber,
408 ri->issuer_and_serial->serial);
412 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
415 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
417 ASN1_OCTET_STRING *data_body = NULL;
418 const EVP_MD *evp_md;
419 const EVP_CIPHER *evp_cipher = NULL;
420 EVP_CIPHER_CTX *evp_ctx = NULL;
421 X509_ALGOR *enc_alg = NULL;
422 STACK_OF(X509_ALGOR) *md_sk = NULL;
423 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
424 PKCS7_RECIP_INFO *ri = NULL;
425 unsigned char *ek = NULL, *tkey = NULL;
426 int eklen = 0, tkeylen = 0;
429 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
433 if (p7->d.ptr == NULL) {
434 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
438 i = OBJ_obj2nid(p7->type);
439 p7->state = PKCS7_S_HEADER;
442 case NID_pkcs7_signed:
443 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
444 if (!PKCS7_is_detached(p7) && data_body == NULL) {
445 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
446 PKCS7_R_INVALID_SIGNED_DATA_TYPE);
449 md_sk = p7->d.sign->md_algs;
451 case NID_pkcs7_signedAndEnveloped:
452 rsk = p7->d.signed_and_enveloped->recipientinfo;
453 md_sk = p7->d.signed_and_enveloped->md_algs;
454 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
455 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
456 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
457 if (evp_cipher == NULL) {
458 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
459 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
463 case NID_pkcs7_enveloped:
464 rsk = p7->d.enveloped->recipientinfo;
465 enc_alg = p7->d.enveloped->enc_data->algorithm;
466 data_body = p7->d.enveloped->enc_data->enc_data;
467 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
468 if (evp_cipher == NULL) {
469 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
470 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
475 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
479 /* We will be checking the signature */
481 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
482 xa = sk_X509_ALGOR_value(md_sk, i);
483 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
484 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
488 j = OBJ_obj2nid(xa->algorithm);
489 evp_md = EVP_get_digestbynid(j);
490 if (evp_md == NULL) {
491 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
492 PKCS7_R_UNKNOWN_DIGEST_TYPE);
496 BIO_set_md(btmp, evp_md);
505 if (evp_cipher != NULL) {
506 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
507 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
512 * It was encrypted, we need to decrypt the secret key with the
517 * Find the recipientInfo which matches the passed certificate (if
522 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
523 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
524 if (!pkcs7_cmp_ri(ri, pcert))
529 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
530 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
535 /* If we haven't got a certificate try each ri in turn */
538 * Always attempt to decrypt all rinfo even after success as a
539 * defence against MMA timing attacks.
541 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
542 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
544 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
549 /* Only exit on fatal errors, not decrypt failure */
550 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
556 BIO_get_cipher_ctx(etmp, &evp_ctx);
557 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
559 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
561 /* Generate random key as MMA defence */
562 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
563 tkey = OPENSSL_malloc(tkeylen);
566 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
574 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
576 * Some S/MIME clients don't use the same key and effective key
577 * length. The key length is determined by the size of the
580 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
581 /* Use random key as MMA defence */
582 OPENSSL_cleanse(ek, eklen);
589 /* Clear errors so we don't leak information useful in MMA */
591 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
595 OPENSSL_cleanse(ek, eklen);
600 OPENSSL_cleanse(tkey, tkeylen);
611 if (PKCS7_is_detached(p7) || (in_bio != NULL)) {
614 if (data_body->length > 0)
615 bio = BIO_new_mem_buf(data_body->data, data_body->length);
617 bio = BIO_new(BIO_s_mem());
618 BIO_set_mem_eof_return(bio, 0);
628 OPENSSL_cleanse(ek, eklen);
632 OPENSSL_cleanse(tkey, tkeylen);
644 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
647 bio = BIO_find_type(bio, BIO_TYPE_MD);
649 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
650 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
653 BIO_get_md_ctx(bio, pmd);
655 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
658 if (EVP_MD_CTX_type(*pmd) == nid)
665 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
667 unsigned char md_data[EVP_MAX_MD_SIZE];
670 /* Add signing time if not already present */
671 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
672 if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
673 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
679 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
680 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
683 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
684 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
688 /* Now sign the attributes */
689 if (!PKCS7_SIGNER_INFO_sign(si))
695 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
700 PKCS7_SIGNER_INFO *si;
701 EVP_MD_CTX *mdc, ctx_tmp;
702 STACK_OF(X509_ATTRIBUTE) *sk;
703 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
704 ASN1_OCTET_STRING *os = NULL;
707 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
711 if (p7->d.ptr == NULL) {
712 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
716 EVP_MD_CTX_init(&ctx_tmp);
717 i = OBJ_obj2nid(p7->type);
718 p7->state = PKCS7_S_HEADER;
724 case NID_pkcs7_signedAndEnveloped:
725 /* XXXXXXXXXXXXXXXX */
726 si_sk = p7->d.signed_and_enveloped->signer_info;
727 os = p7->d.signed_and_enveloped->enc_data->enc_data;
729 os = ASN1_OCTET_STRING_new();
731 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
734 p7->d.signed_and_enveloped->enc_data->enc_data = os;
737 case NID_pkcs7_enveloped:
738 /* XXXXXXXXXXXXXXXX */
739 os = p7->d.enveloped->enc_data->enc_data;
741 os = ASN1_OCTET_STRING_new();
743 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
746 p7->d.enveloped->enc_data->enc_data = os;
749 case NID_pkcs7_signed:
750 si_sk = p7->d.sign->signer_info;
751 os = PKCS7_get_octet_string(p7->d.sign->contents);
752 /* If detached data then the content is excluded */
753 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
754 ASN1_OCTET_STRING_free(os);
756 p7->d.sign->contents->d.data = NULL;
760 case NID_pkcs7_digest:
761 os = PKCS7_get_octet_string(p7->d.digest->contents);
762 /* If detached data then the content is excluded */
763 if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
764 ASN1_OCTET_STRING_free(os);
766 p7->d.digest->contents->d.data = NULL;
771 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
776 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
777 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
778 if (si->pkey == NULL)
781 j = OBJ_obj2nid(si->digest_alg->algorithm);
785 btmp = PKCS7_find_digest(&mdc, btmp, j);
791 * We now have the EVP_MD_CTX, lets do the signing.
793 if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc))
799 * If there are attributes, we add the digest attribute and only
800 * sign the attributes
802 if (sk_X509_ATTRIBUTE_num(sk) > 0) {
803 if (!do_pkcs7_signed_attrib(si, &ctx_tmp))
806 unsigned char *abuf = NULL;
807 unsigned int abuflen;
808 abuflen = EVP_PKEY_size(si->pkey);
809 abuf = OPENSSL_malloc(abuflen);
813 if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) {
814 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
817 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
820 } else if (i == NID_pkcs7_digest) {
821 unsigned char md_data[EVP_MAX_MD_SIZE];
823 if (!PKCS7_find_digest(&mdc, bio,
824 OBJ_obj2nid(p7->d.digest->md->algorithm)))
826 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
828 ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
831 if (!PKCS7_is_detached(p7)) {
833 * NOTE(emilia): I think we only reach os == NULL here because detached
834 * digested data support is broken.
838 if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
841 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
843 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
846 contlen = BIO_get_mem_data(btmp, &cont);
848 * Mark the BIO read only then we can use its copy of the data
849 * instead of making an extra copy.
851 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
852 BIO_set_mem_eof_return(btmp, 0);
853 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
858 EVP_MD_CTX_cleanup(&ctx_tmp);
862 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
866 unsigned char *abuf = NULL;
869 const EVP_MD *md = NULL;
871 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
875 EVP_MD_CTX_init(&mctx);
876 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0)
879 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
880 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
881 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
885 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
886 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
889 if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0)
893 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0)
895 abuf = OPENSSL_malloc(siglen);
898 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0)
901 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
902 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
903 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
907 EVP_MD_CTX_cleanup(&mctx);
909 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
916 EVP_MD_CTX_cleanup(&mctx);
921 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
922 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
924 PKCS7_ISSUER_AND_SERIAL *ias;
926 STACK_OF(X509) *cert;
930 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
934 if (p7->d.ptr == NULL) {
935 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
939 if (PKCS7_type_is_signed(p7)) {
940 cert = p7->d.sign->cert;
941 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
942 cert = p7->d.signed_and_enveloped->cert;
944 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
947 /* XXXXXXXXXXXXXXXXXXXXXXX */
948 ias = si->issuer_and_serial;
950 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
952 /* were we able to find the cert in passed to us */
954 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
955 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
960 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
961 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
964 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
965 i = X509_verify_cert(ctx);
967 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
968 X509_STORE_CTX_cleanup(ctx);
971 X509_STORE_CTX_cleanup(ctx);
973 return PKCS7_signatureVerify(bio, p7, si, x509);
978 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
981 ASN1_OCTET_STRING *os;
982 EVP_MD_CTX mdc_tmp, *mdc;
985 STACK_OF(X509_ATTRIBUTE) *sk;
989 EVP_MD_CTX_init(&mdc_tmp);
991 if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
992 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
996 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
1000 if ((btmp == NULL) ||
1001 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
1002 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1003 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1006 BIO_get_md_ctx(btmp, &mdc);
1008 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
1011 if (EVP_MD_CTX_type(mdc) == md_type)
1014 * Workaround for some broken clients that put the signature OID
1015 * instead of the digest OID in digest_alg->algorithm
1017 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1019 btmp = BIO_next(btmp);
1023 * mdc is the digest ctx that we want, unless there are attributes, in
1024 * which case the digest is the signed attributes
1026 if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc))
1030 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
1031 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1032 unsigned int md_len;
1034 ASN1_OCTET_STRING *message_digest;
1036 if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len))
1038 message_digest = PKCS7_digest_from_attributes(sk);
1039 if (!message_digest) {
1040 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1041 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1044 if ((message_digest->length != (int)md_len) ||
1045 (memcmp(message_digest->data, md_dat, md_len))) {
1046 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1051 if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL))
1054 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1055 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1057 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1061 if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen))
1067 os = si->enc_digest;
1068 pkey = X509_get_pubkey(x509);
1074 i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey);
1075 EVP_PKEY_free(pkey);
1077 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1083 EVP_MD_CTX_cleanup(&mdc_tmp);
1087 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1089 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1090 PKCS7_RECIP_INFO *ri;
1093 i = OBJ_obj2nid(p7->type);
1094 if (i != NID_pkcs7_signedAndEnveloped)
1096 if (p7->d.signed_and_enveloped == NULL)
1098 rsk = p7->d.signed_and_enveloped->recipientinfo;
1101 ri = sk_PKCS7_RECIP_INFO_value(rsk, 0);
1102 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1104 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1105 return (ri->issuer_and_serial);
1108 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1110 return (get_attribute(si->auth_attr, nid));
1113 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1115 return (get_attribute(si->unauth_attr, nid));
1118 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1122 idx = X509at_get_attr_by_NID(sk, nid, -1);
1123 xa = X509at_get_attr(sk, idx);
1124 return X509_ATTRIBUTE_get0_type(xa, 0);
1127 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1130 if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest)))
1132 return astype->value.octet_string;
1135 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1136 STACK_OF(X509_ATTRIBUTE) *sk)
1140 if (p7si->auth_attr != NULL)
1141 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
1142 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1143 if (p7si->auth_attr == NULL)
1145 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1146 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1147 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1155 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1156 STACK_OF(X509_ATTRIBUTE) *sk)
1160 if (p7si->unauth_attr != NULL)
1161 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
1162 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1163 if (p7si->unauth_attr == NULL)
1165 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1166 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1167 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1175 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1178 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1181 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1184 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1187 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1190 X509_ATTRIBUTE *attr = NULL;
1193 *sk = sk_X509_ATTRIBUTE_new_null();
1197 if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value)))
1199 if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1200 X509_ATTRIBUTE_free(attr);
1206 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1207 attr = sk_X509_ATTRIBUTE_value(*sk, i);
1208 if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) {
1209 X509_ATTRIBUTE_free(attr);
1210 attr = X509_ATTRIBUTE_create(nid, atrtype, value);
1213 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1214 X509_ATTRIBUTE_free(attr);