2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include <openssl/rand.h>
13 #include <openssl/objects.h>
14 #include <openssl/x509.h>
15 #include <openssl/x509v3.h>
16 #include <openssl/err.h>
18 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
20 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
22 static int PKCS7_type_is_other(PKCS7 *p7)
26 int nid = OBJ_obj2nid(p7->type);
30 case NID_pkcs7_signed:
31 case NID_pkcs7_enveloped:
32 case NID_pkcs7_signedAndEnveloped:
33 case NID_pkcs7_digest:
34 case NID_pkcs7_encrypted:
45 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
47 if (PKCS7_type_is_data(p7))
49 if (PKCS7_type_is_other(p7) && p7->d.other
50 && (p7->d.other->type == V_ASN1_OCTET_STRING))
51 return p7->d.other->value.octet_string;
55 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
59 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
60 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
64 md = EVP_get_digestbyobj(alg->algorithm);
66 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE);
73 else if (!BIO_push(*pbio, btmp)) {
74 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
87 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
88 unsigned char *key, int keylen)
90 EVP_PKEY_CTX *pctx = NULL;
91 EVP_PKEY *pkey = NULL;
92 unsigned char *ek = NULL;
96 pkey = X509_get0_pubkey(ri->cert);
101 pctx = EVP_PKEY_CTX_new(pkey, NULL);
105 if (EVP_PKEY_encrypt_init(pctx) <= 0)
108 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
109 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
110 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
114 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
117 ek = OPENSSL_malloc(eklen);
120 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
124 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
127 ASN1_STRING_set0(ri->enc_key, ek, eklen);
133 EVP_PKEY_CTX_free(pctx);
139 static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
140 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
142 EVP_PKEY_CTX *pctx = NULL;
143 unsigned char *ek = NULL;
148 pctx = EVP_PKEY_CTX_new(pkey, NULL);
152 if (EVP_PKEY_decrypt_init(pctx) <= 0)
155 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
156 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
157 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
161 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
162 ri->enc_key->data, ri->enc_key->length) <= 0)
165 ek = OPENSSL_malloc(eklen);
168 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
172 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
173 ri->enc_key->data, ri->enc_key->length) <= 0) {
175 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
181 OPENSSL_clear_free(*pek, *peklen);
186 EVP_PKEY_CTX_free(pctx);
193 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
196 BIO *out = NULL, *btmp = NULL;
197 X509_ALGOR *xa = NULL;
198 const EVP_CIPHER *evp_cipher = NULL;
199 STACK_OF(X509_ALGOR) *md_sk = NULL;
200 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
201 X509_ALGOR *xalg = NULL;
202 PKCS7_RECIP_INFO *ri = NULL;
203 ASN1_OCTET_STRING *os = NULL;
206 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
210 * The content field in the PKCS7 ContentInfo is optional, but that really
211 * only applies to inner content (precisely, detached signatures).
213 * When reading content, missing outer content is therefore treated as an
216 * When creating content, PKCS7_content_new() must be called before
217 * calling this method, so a NULL p7->d is always an error.
219 if (p7->d.ptr == NULL) {
220 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
224 i = OBJ_obj2nid(p7->type);
225 p7->state = PKCS7_S_HEADER;
228 case NID_pkcs7_signed:
229 md_sk = p7->d.sign->md_algs;
230 os = PKCS7_get_octet_string(p7->d.sign->contents);
232 case NID_pkcs7_signedAndEnveloped:
233 rsk = p7->d.signed_and_enveloped->recipientinfo;
234 md_sk = p7->d.signed_and_enveloped->md_algs;
235 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
236 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
237 if (evp_cipher == NULL) {
238 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
242 case NID_pkcs7_enveloped:
243 rsk = p7->d.enveloped->recipientinfo;
244 xalg = p7->d.enveloped->enc_data->algorithm;
245 evp_cipher = p7->d.enveloped->enc_data->cipher;
246 if (evp_cipher == NULL) {
247 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
251 case NID_pkcs7_digest:
252 xa = p7->d.digest->md;
253 os = PKCS7_get_octet_string(p7->d.digest->contents);
258 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
262 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
263 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
266 if (xa && !PKCS7_bio_add_digest(&out, xa))
269 if (evp_cipher != NULL) {
270 unsigned char key[EVP_MAX_KEY_LENGTH];
271 unsigned char iv[EVP_MAX_IV_LENGTH];
275 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
276 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
279 BIO_get_cipher_ctx(btmp, &ctx);
280 keylen = EVP_CIPHER_key_length(evp_cipher);
281 ivlen = EVP_CIPHER_iv_length(evp_cipher);
282 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
284 if (RAND_bytes(iv, ivlen) <= 0)
286 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
288 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
290 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
294 if (xalg->parameter == NULL) {
295 xalg->parameter = ASN1_TYPE_new();
296 if (xalg->parameter == NULL)
299 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
303 /* Lets do the pub key stuff :-) */
304 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
305 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
306 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
309 OPENSSL_cleanse(key, keylen);
319 if (PKCS7_is_detached(p7))
320 bio = BIO_new(BIO_s_null());
321 else if (os && os->length > 0)
322 bio = BIO_new_mem_buf(os->data, os->length);
324 bio = BIO_new(BIO_s_mem());
327 BIO_set_mem_eof_return(bio, 0);
342 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
345 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
346 X509_get_issuer_name(pcert));
349 return ASN1_INTEGER_cmp(X509_get_serialNumber(pcert),
350 ri->issuer_and_serial->serial);
354 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
357 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
359 ASN1_OCTET_STRING *data_body = NULL;
360 const EVP_MD *evp_md;
361 const EVP_CIPHER *evp_cipher = NULL;
362 EVP_CIPHER_CTX *evp_ctx = NULL;
363 X509_ALGOR *enc_alg = NULL;
364 STACK_OF(X509_ALGOR) *md_sk = NULL;
365 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
366 PKCS7_RECIP_INFO *ri = NULL;
367 unsigned char *ek = NULL, *tkey = NULL;
368 int eklen = 0, tkeylen = 0;
371 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
375 if (p7->d.ptr == NULL) {
376 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
380 i = OBJ_obj2nid(p7->type);
381 p7->state = PKCS7_S_HEADER;
384 case NID_pkcs7_signed:
386 * p7->d.sign->contents is a PKCS7 structure consisting of a contentType
387 * field and optional content.
388 * data_body is NULL if that structure has no (=detached) content
389 * or if the contentType is wrong (i.e., not "data").
391 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
392 if (!PKCS7_is_detached(p7) && data_body == NULL) {
393 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
394 PKCS7_R_INVALID_SIGNED_DATA_TYPE);
397 md_sk = p7->d.sign->md_algs;
399 case NID_pkcs7_signedAndEnveloped:
400 rsk = p7->d.signed_and_enveloped->recipientinfo;
401 md_sk = p7->d.signed_and_enveloped->md_algs;
402 /* data_body is NULL if the optional EncryptedContent is missing. */
403 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
404 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
405 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
406 if (evp_cipher == NULL) {
407 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
408 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
412 case NID_pkcs7_enveloped:
413 rsk = p7->d.enveloped->recipientinfo;
414 enc_alg = p7->d.enveloped->enc_data->algorithm;
415 /* data_body is NULL if the optional EncryptedContent is missing. */
416 data_body = p7->d.enveloped->enc_data->enc_data;
417 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
418 if (evp_cipher == NULL) {
419 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
420 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
425 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
429 /* Detached content must be supplied via in_bio instead. */
430 if (data_body == NULL && in_bio == NULL) {
431 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
435 /* We will be checking the signature */
437 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
438 xa = sk_X509_ALGOR_value(md_sk, i);
439 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
440 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
444 j = OBJ_obj2nid(xa->algorithm);
445 evp_md = EVP_get_digestbynid(j);
446 if (evp_md == NULL) {
447 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
448 PKCS7_R_UNKNOWN_DIGEST_TYPE);
452 BIO_set_md(btmp, evp_md);
461 if (evp_cipher != NULL) {
462 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
463 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
468 * It was encrypted, we need to decrypt the secret key with the
473 * Find the recipientInfo which matches the passed certificate (if
478 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
479 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
480 if (!pkcs7_cmp_ri(ri, pcert))
485 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
486 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
491 /* If we haven't got a certificate try each ri in turn */
494 * Always attempt to decrypt all rinfo even after success as a
495 * defence against MMA timing attacks.
497 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
498 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
500 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
505 /* Only exit on fatal errors, not decrypt failure */
506 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
512 BIO_get_cipher_ctx(etmp, &evp_ctx);
513 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
515 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
517 /* Generate random key as MMA defence */
518 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
519 tkey = OPENSSL_malloc(tkeylen);
522 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
530 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
532 * Some S/MIME clients don't use the same key and effective key
533 * length. The key length is determined by the size of the
536 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
537 /* Use random key as MMA defence */
538 OPENSSL_clear_free(ek, eklen);
544 /* Clear errors so we don't leak information useful in MMA */
546 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
549 OPENSSL_clear_free(ek, eklen);
551 OPENSSL_clear_free(tkey, tkeylen);
560 if (in_bio != NULL) {
563 if (data_body->length > 0)
564 bio = BIO_new_mem_buf(data_body->data, data_body->length);
566 bio = BIO_new(BIO_s_mem());
569 BIO_set_mem_eof_return(bio, 0);
579 OPENSSL_clear_free(ek, eklen);
580 OPENSSL_clear_free(tkey, tkeylen);
588 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
591 bio = BIO_find_type(bio, BIO_TYPE_MD);
593 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
594 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
597 BIO_get_md_ctx(bio, pmd);
599 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
602 if (EVP_MD_CTX_type(*pmd) == nid)
609 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
611 unsigned char md_data[EVP_MAX_MD_SIZE];
614 /* Add signing time if not already present */
615 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
616 if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
617 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
623 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
624 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
627 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
628 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
632 /* Now sign the attributes */
633 if (!PKCS7_SIGNER_INFO_sign(si))
639 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
644 PKCS7_SIGNER_INFO *si;
645 EVP_MD_CTX *mdc, *ctx_tmp;
646 STACK_OF(X509_ATTRIBUTE) *sk;
647 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
648 ASN1_OCTET_STRING *os = NULL;
651 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
655 if (p7->d.ptr == NULL) {
656 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
660 ctx_tmp = EVP_MD_CTX_new();
661 if (ctx_tmp == NULL) {
662 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
666 i = OBJ_obj2nid(p7->type);
667 p7->state = PKCS7_S_HEADER;
673 case NID_pkcs7_signedAndEnveloped:
674 /* XXXXXXXXXXXXXXXX */
675 si_sk = p7->d.signed_and_enveloped->signer_info;
676 os = p7->d.signed_and_enveloped->enc_data->enc_data;
678 os = ASN1_OCTET_STRING_new();
680 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
683 p7->d.signed_and_enveloped->enc_data->enc_data = os;
686 case NID_pkcs7_enveloped:
687 /* XXXXXXXXXXXXXXXX */
688 os = p7->d.enveloped->enc_data->enc_data;
690 os = ASN1_OCTET_STRING_new();
692 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
695 p7->d.enveloped->enc_data->enc_data = os;
698 case NID_pkcs7_signed:
699 si_sk = p7->d.sign->signer_info;
700 os = PKCS7_get_octet_string(p7->d.sign->contents);
701 /* If detached data then the content is excluded */
702 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
703 ASN1_OCTET_STRING_free(os);
705 p7->d.sign->contents->d.data = NULL;
709 case NID_pkcs7_digest:
710 os = PKCS7_get_octet_string(p7->d.digest->contents);
711 /* If detached data then the content is excluded */
712 if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
713 ASN1_OCTET_STRING_free(os);
715 p7->d.digest->contents->d.data = NULL;
720 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
725 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
726 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
727 if (si->pkey == NULL)
730 j = OBJ_obj2nid(si->digest_alg->algorithm);
734 btmp = PKCS7_find_digest(&mdc, btmp, j);
740 * We now have the EVP_MD_CTX, lets do the signing.
742 if (!EVP_MD_CTX_copy_ex(ctx_tmp, mdc))
748 * If there are attributes, we add the digest attribute and only
749 * sign the attributes
751 if (sk_X509_ATTRIBUTE_num(sk) > 0) {
752 if (!do_pkcs7_signed_attrib(si, ctx_tmp))
755 unsigned char *abuf = NULL;
756 unsigned int abuflen;
757 abuflen = EVP_PKEY_size(si->pkey);
758 abuf = OPENSSL_malloc(abuflen);
762 if (!EVP_SignFinal(ctx_tmp, abuf, &abuflen, si->pkey)) {
764 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
767 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
770 } else if (i == NID_pkcs7_digest) {
771 unsigned char md_data[EVP_MAX_MD_SIZE];
773 if (!PKCS7_find_digest(&mdc, bio,
774 OBJ_obj2nid(p7->d.digest->md->algorithm)))
776 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
778 if (!ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len))
782 if (!PKCS7_is_detached(p7)) {
784 * NOTE(emilia): I think we only reach os == NULL here because detached
785 * digested data support is broken.
789 if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
792 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
794 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
797 contlen = BIO_get_mem_data(btmp, &cont);
799 * Mark the BIO read only then we can use its copy of the data
800 * instead of making an extra copy.
802 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
803 BIO_set_mem_eof_return(btmp, 0);
804 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
809 EVP_MD_CTX_free(ctx_tmp);
813 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
817 unsigned char *abuf = NULL;
820 const EVP_MD *md = NULL;
822 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
826 mctx = EVP_MD_CTX_new();
828 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, ERR_R_MALLOC_FAILURE);
832 if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
835 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
836 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
837 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
841 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
842 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
845 if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
849 if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
851 abuf = OPENSSL_malloc(siglen);
854 if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
857 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
858 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
859 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
863 EVP_MD_CTX_free(mctx);
865 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
871 EVP_MD_CTX_free(mctx);
876 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
877 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
879 PKCS7_ISSUER_AND_SERIAL *ias;
881 STACK_OF(X509) *cert;
885 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
889 if (p7->d.ptr == NULL) {
890 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
894 if (PKCS7_type_is_signed(p7)) {
895 cert = p7->d.sign->cert;
896 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
897 cert = p7->d.signed_and_enveloped->cert;
899 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
902 /* XXXXXXXXXXXXXXXXXXXXXXX */
903 ias = si->issuer_and_serial;
905 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
907 /* were we able to find the cert in passed to us */
909 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
910 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
915 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
916 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
919 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
920 i = X509_verify_cert(ctx);
922 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
923 X509_STORE_CTX_cleanup(ctx);
926 X509_STORE_CTX_cleanup(ctx);
928 return PKCS7_signatureVerify(bio, p7, si, x509);
933 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
936 ASN1_OCTET_STRING *os;
937 EVP_MD_CTX *mdc_tmp, *mdc;
940 STACK_OF(X509_ATTRIBUTE) *sk;
944 mdc_tmp = EVP_MD_CTX_new();
945 if (mdc_tmp == NULL) {
946 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_MALLOC_FAILURE);
950 if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
951 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
955 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
959 if ((btmp == NULL) ||
960 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
961 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
962 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
965 BIO_get_md_ctx(btmp, &mdc);
967 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
970 if (EVP_MD_CTX_type(mdc) == md_type)
973 * Workaround for some broken clients that put the signature OID
974 * instead of the digest OID in digest_alg->algorithm
976 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
978 btmp = BIO_next(btmp);
982 * mdc is the digest ctx that we want, unless there are attributes, in
983 * which case the digest is the signed attributes
985 if (!EVP_MD_CTX_copy_ex(mdc_tmp, mdc))
989 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
990 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
993 ASN1_OCTET_STRING *message_digest;
995 if (!EVP_DigestFinal_ex(mdc_tmp, md_dat, &md_len))
997 message_digest = PKCS7_digest_from_attributes(sk);
998 if (!message_digest) {
999 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1000 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1003 if ((message_digest->length != (int)md_len) ||
1004 (memcmp(message_digest->data, md_dat, md_len))) {
1005 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1010 if (!EVP_VerifyInit_ex(mdc_tmp, EVP_get_digestbynid(md_type), NULL))
1013 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1014 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1016 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1020 if (!EVP_VerifyUpdate(mdc_tmp, abuf, alen))
1026 os = si->enc_digest;
1027 pkey = X509_get0_pubkey(x509);
1033 i = EVP_VerifyFinal(mdc_tmp, os->data, os->length, pkey);
1035 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1041 EVP_MD_CTX_free(mdc_tmp);
1045 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1047 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1048 PKCS7_RECIP_INFO *ri;
1051 i = OBJ_obj2nid(p7->type);
1052 if (i != NID_pkcs7_signedAndEnveloped)
1054 if (p7->d.signed_and_enveloped == NULL)
1056 rsk = p7->d.signed_and_enveloped->recipientinfo;
1059 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1061 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1062 return (ri->issuer_and_serial);
1065 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1067 return (get_attribute(si->auth_attr, nid));
1070 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1072 return (get_attribute(si->unauth_attr, nid));
1075 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1079 idx = X509at_get_attr_by_NID(sk, nid, -1);
1080 xa = X509at_get_attr(sk, idx);
1081 return X509_ATTRIBUTE_get0_type(xa, 0);
1084 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1087 if ((astype = get_attribute(sk, NID_pkcs9_messageDigest)) == NULL)
1089 return astype->value.octet_string;
1092 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1093 STACK_OF(X509_ATTRIBUTE) *sk)
1097 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
1098 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1099 if (p7si->auth_attr == NULL)
1101 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1102 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1103 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1111 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1112 STACK_OF(X509_ATTRIBUTE) *sk)
1116 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
1117 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1118 if (p7si->unauth_attr == NULL)
1120 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1121 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1122 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1130 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1133 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1136 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1139 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1142 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1145 X509_ATTRIBUTE *attr = NULL;
1148 if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
1151 if ((attr = X509_ATTRIBUTE_create(nid, atrtype, value)) == NULL)
1153 if (!sk_X509_ATTRIBUTE_push(*sk, attr)) {
1154 X509_ATTRIBUTE_free(attr);
1160 for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) {
1161 attr = sk_X509_ATTRIBUTE_value(*sk, i);
1162 if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr)) == nid) {
1163 X509_ATTRIBUTE_free(attr);
1164 attr = X509_ATTRIBUTE_create(nid, atrtype, value);
1167 if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) {
1168 X509_ATTRIBUTE_free(attr);