1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
59 #include "internal/cryptlib.h"
60 #include <openssl/rand.h>
61 #include <openssl/objects.h>
62 #include <openssl/x509.h>
63 #include <openssl/x509v3.h>
64 #include <openssl/err.h>
66 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
68 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid);
70 static int PKCS7_type_is_other(PKCS7 *p7)
74 int nid = OBJ_obj2nid(p7->type);
78 case NID_pkcs7_signed:
79 case NID_pkcs7_enveloped:
80 case NID_pkcs7_signedAndEnveloped:
81 case NID_pkcs7_digest:
82 case NID_pkcs7_encrypted:
93 static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
95 if (PKCS7_type_is_data(p7))
97 if (PKCS7_type_is_other(p7) && p7->d.other
98 && (p7->d.other->type == V_ASN1_OCTET_STRING))
99 return p7->d.other->value.octet_string;
103 static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
107 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
108 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
112 md = EVP_get_digestbyobj(alg->algorithm);
114 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE);
118 BIO_set_md(btmp, md);
121 else if (!BIO_push(*pbio, btmp)) {
122 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB);
135 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri,
136 unsigned char *key, int keylen)
138 EVP_PKEY_CTX *pctx = NULL;
139 EVP_PKEY *pkey = NULL;
140 unsigned char *ek = NULL;
144 pkey = X509_get0_pubkey(ri->cert);
149 pctx = EVP_PKEY_CTX_new(pkey, NULL);
153 if (EVP_PKEY_encrypt_init(pctx) <= 0)
156 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
157 EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) {
158 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
162 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
165 ek = OPENSSL_malloc(eklen);
168 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
172 if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
175 ASN1_STRING_set0(ri->enc_key, ek, eklen);
181 EVP_PKEY_CTX_free(pctx);
187 static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen,
188 PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey)
190 EVP_PKEY_CTX *pctx = NULL;
191 unsigned char *ek = NULL;
196 pctx = EVP_PKEY_CTX_new(pkey, NULL);
200 if (EVP_PKEY_decrypt_init(pctx) <= 0)
203 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT,
204 EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) {
205 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
209 if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
210 ri->enc_key->data, ri->enc_key->length) <= 0)
213 ek = OPENSSL_malloc(eklen);
216 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
220 if (EVP_PKEY_decrypt(pctx, ek, &eklen,
221 ri->enc_key->data, ri->enc_key->length) <= 0) {
223 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
229 OPENSSL_clear_free(*pek, *peklen);
234 EVP_PKEY_CTX_free(pctx);
241 BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
244 BIO *out = NULL, *btmp = NULL;
245 X509_ALGOR *xa = NULL;
246 const EVP_CIPHER *evp_cipher = NULL;
247 STACK_OF(X509_ALGOR) *md_sk = NULL;
248 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
249 X509_ALGOR *xalg = NULL;
250 PKCS7_RECIP_INFO *ri = NULL;
251 ASN1_OCTET_STRING *os = NULL;
254 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
258 * The content field in the PKCS7 ContentInfo is optional, but that really
259 * only applies to inner content (precisely, detached signatures).
261 * When reading content, missing outer content is therefore treated as an
264 * When creating content, PKCS7_content_new() must be called before
265 * calling this method, so a NULL p7->d is always an error.
267 if (p7->d.ptr == NULL) {
268 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
272 i = OBJ_obj2nid(p7->type);
273 p7->state = PKCS7_S_HEADER;
276 case NID_pkcs7_signed:
277 md_sk = p7->d.sign->md_algs;
278 os = PKCS7_get_octet_string(p7->d.sign->contents);
280 case NID_pkcs7_signedAndEnveloped:
281 rsk = p7->d.signed_and_enveloped->recipientinfo;
282 md_sk = p7->d.signed_and_enveloped->md_algs;
283 xalg = p7->d.signed_and_enveloped->enc_data->algorithm;
284 evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher;
285 if (evp_cipher == NULL) {
286 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
290 case NID_pkcs7_enveloped:
291 rsk = p7->d.enveloped->recipientinfo;
292 xalg = p7->d.enveloped->enc_data->algorithm;
293 evp_cipher = p7->d.enveloped->enc_data->cipher;
294 if (evp_cipher == NULL) {
295 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED);
299 case NID_pkcs7_digest:
300 xa = p7->d.digest->md;
301 os = PKCS7_get_octet_string(p7->d.digest->contents);
306 PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
310 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++)
311 if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
314 if (xa && !PKCS7_bio_add_digest(&out, xa))
317 if (evp_cipher != NULL) {
318 unsigned char key[EVP_MAX_KEY_LENGTH];
319 unsigned char iv[EVP_MAX_IV_LENGTH];
323 if ((btmp = BIO_new(BIO_f_cipher())) == NULL) {
324 PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB);
327 BIO_get_cipher_ctx(btmp, &ctx);
328 keylen = EVP_CIPHER_key_length(evp_cipher);
329 ivlen = EVP_CIPHER_iv_length(evp_cipher);
330 xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
332 if (RAND_bytes(iv, ivlen) <= 0)
334 if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0)
336 if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
338 if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
342 if (xalg->parameter == NULL) {
343 xalg->parameter = ASN1_TYPE_new();
344 if (xalg->parameter == NULL)
347 if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
351 /* Lets do the pub key stuff :-) */
352 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
353 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
354 if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
357 OPENSSL_cleanse(key, keylen);
367 if (PKCS7_is_detached(p7))
368 bio = BIO_new(BIO_s_null());
369 else if (os && os->length > 0)
370 bio = BIO_new_mem_buf(os->data, os->length);
372 bio = BIO_new(BIO_s_mem());
375 BIO_set_mem_eof_return(bio, 0);
390 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert)
393 ret = X509_NAME_cmp(ri->issuer_and_serial->issuer,
394 X509_get_issuer_name(pcert));
397 return ASN1_INTEGER_cmp(X509_get_serialNumber(pcert),
398 ri->issuer_and_serial->serial);
402 BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
405 BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL;
407 ASN1_OCTET_STRING *data_body = NULL;
408 const EVP_MD *evp_md;
409 const EVP_CIPHER *evp_cipher = NULL;
410 EVP_CIPHER_CTX *evp_ctx = NULL;
411 X509_ALGOR *enc_alg = NULL;
412 STACK_OF(X509_ALGOR) *md_sk = NULL;
413 STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL;
414 PKCS7_RECIP_INFO *ri = NULL;
415 unsigned char *ek = NULL, *tkey = NULL;
416 int eklen = 0, tkeylen = 0;
419 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER);
423 if (p7->d.ptr == NULL) {
424 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
428 i = OBJ_obj2nid(p7->type);
429 p7->state = PKCS7_S_HEADER;
432 case NID_pkcs7_signed:
434 * p7->d.sign->contents is a PKCS7 structure consisting of a contentType
435 * field and optional content.
436 * data_body is NULL if that structure has no (=detached) content
437 * or if the contentType is wrong (i.e., not "data").
439 data_body = PKCS7_get_octet_string(p7->d.sign->contents);
440 if (!PKCS7_is_detached(p7) && data_body == NULL) {
441 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
442 PKCS7_R_INVALID_SIGNED_DATA_TYPE);
445 md_sk = p7->d.sign->md_algs;
447 case NID_pkcs7_signedAndEnveloped:
448 rsk = p7->d.signed_and_enveloped->recipientinfo;
449 md_sk = p7->d.signed_and_enveloped->md_algs;
450 /* data_body is NULL if the optional EncryptedContent is missing. */
451 data_body = p7->d.signed_and_enveloped->enc_data->enc_data;
452 enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm;
453 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
454 if (evp_cipher == NULL) {
455 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
456 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
460 case NID_pkcs7_enveloped:
461 rsk = p7->d.enveloped->recipientinfo;
462 enc_alg = p7->d.enveloped->enc_data->algorithm;
463 /* data_body is NULL if the optional EncryptedContent is missing. */
464 data_body = p7->d.enveloped->enc_data->enc_data;
465 evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm);
466 if (evp_cipher == NULL) {
467 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
468 PKCS7_R_UNSUPPORTED_CIPHER_TYPE);
473 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
477 /* Detached content must be supplied via in_bio instead. */
478 if (data_body == NULL && in_bio == NULL) {
479 PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
483 /* We will be checking the signature */
485 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
486 xa = sk_X509_ALGOR_value(md_sk, i);
487 if ((btmp = BIO_new(BIO_f_md())) == NULL) {
488 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
492 j = OBJ_obj2nid(xa->algorithm);
493 evp_md = EVP_get_digestbynid(j);
494 if (evp_md == NULL) {
495 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
496 PKCS7_R_UNKNOWN_DIGEST_TYPE);
500 BIO_set_md(btmp, evp_md);
509 if (evp_cipher != NULL) {
510 if ((etmp = BIO_new(BIO_f_cipher())) == NULL) {
511 PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB);
516 * It was encrypted, we need to decrypt the secret key with the
521 * Find the recipientInfo which matches the passed certificate (if
526 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
527 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
528 if (!pkcs7_cmp_ri(ri, pcert))
533 PKCS7err(PKCS7_F_PKCS7_DATADECODE,
534 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE);
539 /* If we haven't got a certificate try each ri in turn */
542 * Always attempt to decrypt all rinfo even after success as a
543 * defence against MMA timing attacks.
545 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) {
546 ri = sk_PKCS7_RECIP_INFO_value(rsk, i);
548 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
553 /* Only exit on fatal errors, not decrypt failure */
554 if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0)
560 BIO_get_cipher_ctx(etmp, &evp_ctx);
561 if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0)
563 if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0)
565 /* Generate random key as MMA defence */
566 tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
567 tkey = OPENSSL_malloc(tkeylen);
570 if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
578 if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) {
580 * Some S/MIME clients don't use the same key and effective key
581 * length. The key length is determined by the size of the
584 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) {
585 /* Use random key as MMA defence */
586 OPENSSL_clear_free(ek, eklen);
592 /* Clear errors so we don't leak information useful in MMA */
594 if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0)
597 OPENSSL_clear_free(ek, eklen);
599 OPENSSL_clear_free(tkey, tkeylen);
608 if (in_bio != NULL) {
611 if (data_body->length > 0)
612 bio = BIO_new_mem_buf(data_body->data, data_body->length);
614 bio = BIO_new(BIO_s_mem());
617 BIO_set_mem_eof_return(bio, 0);
627 OPENSSL_clear_free(ek, eklen);
628 OPENSSL_clear_free(tkey, tkeylen);
636 static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid)
639 bio = BIO_find_type(bio, BIO_TYPE_MD);
641 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST,
642 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
645 BIO_get_md_ctx(bio, pmd);
647 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR);
650 if (EVP_MD_CTX_type(*pmd) == nid)
657 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx)
659 unsigned char md_data[EVP_MAX_MD_SIZE];
662 /* Add signing time if not already present */
663 if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) {
664 if (!PKCS7_add0_attrib_signing_time(si, NULL)) {
665 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
671 if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) {
672 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB);
675 if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) {
676 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE);
680 /* Now sign the attributes */
681 if (!PKCS7_SIGNER_INFO_sign(si))
687 int PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
692 PKCS7_SIGNER_INFO *si;
693 EVP_MD_CTX *mdc, *ctx_tmp;
694 STACK_OF(X509_ATTRIBUTE) *sk;
695 STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
696 ASN1_OCTET_STRING *os = NULL;
699 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER);
703 if (p7->d.ptr == NULL) {
704 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
708 ctx_tmp = EVP_MD_CTX_new();
709 if (ctx_tmp == NULL) {
710 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
714 i = OBJ_obj2nid(p7->type);
715 p7->state = PKCS7_S_HEADER;
721 case NID_pkcs7_signedAndEnveloped:
722 /* XXXXXXXXXXXXXXXX */
723 si_sk = p7->d.signed_and_enveloped->signer_info;
724 os = p7->d.signed_and_enveloped->enc_data->enc_data;
726 os = ASN1_OCTET_STRING_new();
728 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
731 p7->d.signed_and_enveloped->enc_data->enc_data = os;
734 case NID_pkcs7_enveloped:
735 /* XXXXXXXXXXXXXXXX */
736 os = p7->d.enveloped->enc_data->enc_data;
738 os = ASN1_OCTET_STRING_new();
740 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE);
743 p7->d.enveloped->enc_data->enc_data = os;
746 case NID_pkcs7_signed:
747 si_sk = p7->d.sign->signer_info;
748 os = PKCS7_get_octet_string(p7->d.sign->contents);
749 /* If detached data then the content is excluded */
750 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
751 ASN1_OCTET_STRING_free(os);
753 p7->d.sign->contents->d.data = NULL;
757 case NID_pkcs7_digest:
758 os = PKCS7_get_octet_string(p7->d.digest->contents);
759 /* If detached data then the content is excluded */
760 if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) {
761 ASN1_OCTET_STRING_free(os);
763 p7->d.digest->contents->d.data = NULL;
768 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
773 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) {
774 si = sk_PKCS7_SIGNER_INFO_value(si_sk, i);
775 if (si->pkey == NULL)
778 j = OBJ_obj2nid(si->digest_alg->algorithm);
782 btmp = PKCS7_find_digest(&mdc, btmp, j);
788 * We now have the EVP_MD_CTX, lets do the signing.
790 if (!EVP_MD_CTX_copy_ex(ctx_tmp, mdc))
796 * If there are attributes, we add the digest attribute and only
797 * sign the attributes
799 if (sk_X509_ATTRIBUTE_num(sk) > 0) {
800 if (!do_pkcs7_signed_attrib(si, ctx_tmp))
803 unsigned char *abuf = NULL;
804 unsigned int abuflen;
805 abuflen = EVP_PKEY_size(si->pkey);
806 abuf = OPENSSL_malloc(abuflen);
810 if (!EVP_SignFinal(ctx_tmp, abuf, &abuflen, si->pkey)) {
811 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB);
814 ASN1_STRING_set0(si->enc_digest, abuf, abuflen);
817 } else if (i == NID_pkcs7_digest) {
818 unsigned char md_data[EVP_MAX_MD_SIZE];
820 if (!PKCS7_find_digest(&mdc, bio,
821 OBJ_obj2nid(p7->d.digest->md->algorithm)))
823 if (!EVP_DigestFinal_ex(mdc, md_data, &md_len))
825 ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
828 if (!PKCS7_is_detached(p7)) {
830 * NOTE(emilia): I think we only reach os == NULL here because detached
831 * digested data support is broken.
835 if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
838 btmp = BIO_find_type(bio, BIO_TYPE_MEM);
840 PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
843 contlen = BIO_get_mem_data(btmp, &cont);
845 * Mark the BIO read only then we can use its copy of the data
846 * instead of making an extra copy.
848 BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
849 BIO_set_mem_eof_return(btmp, 0);
850 ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
855 EVP_MD_CTX_free(ctx_tmp);
859 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si)
863 unsigned char *abuf = NULL;
866 const EVP_MD *md = NULL;
868 md = EVP_get_digestbyobj(si->digest_alg->algorithm);
872 mctx = EVP_MD_CTX_new();
874 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, ERR_R_MALLOC_FAILURE);
878 if (EVP_DigestSignInit(mctx, &pctx, md, NULL, si->pkey) <= 0)
881 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
882 EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) {
883 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
887 alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf,
888 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN));
891 if (EVP_DigestSignUpdate(mctx, abuf, alen) <= 0)
895 if (EVP_DigestSignFinal(mctx, NULL, &siglen) <= 0)
897 abuf = OPENSSL_malloc(siglen);
900 if (EVP_DigestSignFinal(mctx, abuf, &siglen) <= 0)
903 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN,
904 EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) {
905 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR);
909 EVP_MD_CTX_free(mctx);
911 ASN1_STRING_set0(si->enc_digest, abuf, siglen);
917 EVP_MD_CTX_free(mctx);
922 int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
923 PKCS7 *p7, PKCS7_SIGNER_INFO *si)
925 PKCS7_ISSUER_AND_SERIAL *ias;
927 STACK_OF(X509) *cert;
931 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER);
935 if (p7->d.ptr == NULL) {
936 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
940 if (PKCS7_type_is_signed(p7)) {
941 cert = p7->d.sign->cert;
942 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
943 cert = p7->d.signed_and_enveloped->cert;
945 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
948 /* XXXXXXXXXXXXXXXXXXXXXXX */
949 ias = si->issuer_and_serial;
951 x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial);
953 /* were we able to find the cert in passed to us */
955 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
956 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE);
961 if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) {
962 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
965 X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN);
966 i = X509_verify_cert(ctx);
968 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB);
969 X509_STORE_CTX_cleanup(ctx);
972 X509_STORE_CTX_cleanup(ctx);
974 return PKCS7_signatureVerify(bio, p7, si, x509);
979 int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si,
982 ASN1_OCTET_STRING *os;
983 EVP_MD_CTX *mdc_tmp, *mdc;
986 STACK_OF(X509_ATTRIBUTE) *sk;
990 mdc_tmp = EVP_MD_CTX_new();
991 if (mdc_tmp == NULL) {
992 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_MALLOC_FAILURE);
996 if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) {
997 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE);
1001 md_type = OBJ_obj2nid(si->digest_alg->algorithm);
1005 if ((btmp == NULL) ||
1006 ((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) {
1007 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1008 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1011 BIO_get_md_ctx(btmp, &mdc);
1013 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR);
1016 if (EVP_MD_CTX_type(mdc) == md_type)
1019 * Workaround for some broken clients that put the signature OID
1020 * instead of the digest OID in digest_alg->algorithm
1022 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)
1024 btmp = BIO_next(btmp);
1028 * mdc is the digest ctx that we want, unless there are attributes, in
1029 * which case the digest is the signed attributes
1031 if (!EVP_MD_CTX_copy_ex(mdc_tmp, mdc))
1035 if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) {
1036 unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL;
1037 unsigned int md_len;
1039 ASN1_OCTET_STRING *message_digest;
1041 if (!EVP_DigestFinal_ex(mdc_tmp, md_dat, &md_len))
1043 message_digest = PKCS7_digest_from_attributes(sk);
1044 if (!message_digest) {
1045 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY,
1046 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST);
1049 if ((message_digest->length != (int)md_len) ||
1050 (memcmp(message_digest->data, md_dat, md_len))) {
1051 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE);
1056 if (!EVP_VerifyInit_ex(mdc_tmp, EVP_get_digestbynid(md_type), NULL))
1059 alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf,
1060 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY));
1062 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB);
1066 if (!EVP_VerifyUpdate(mdc_tmp, abuf, alen))
1072 os = si->enc_digest;
1073 pkey = X509_get0_pubkey(x509);
1079 i = EVP_VerifyFinal(mdc_tmp, os->data, os->length, pkey);
1081 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE);
1087 EVP_MD_CTX_free(mdc_tmp);
1091 PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx)
1093 STACK_OF(PKCS7_RECIP_INFO) *rsk;
1094 PKCS7_RECIP_INFO *ri;
1097 i = OBJ_obj2nid(p7->type);
1098 if (i != NID_pkcs7_signedAndEnveloped)
1100 if (p7->d.signed_and_enveloped == NULL)
1102 rsk = p7->d.signed_and_enveloped->recipientinfo;
1105 if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx)
1107 ri = sk_PKCS7_RECIP_INFO_value(rsk, idx);
1108 return (ri->issuer_and_serial);
1111 ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid)
1113 return (get_attribute(si->auth_attr, nid));
1116 ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid)
1118 return (get_attribute(si->unauth_attr, nid));
1121 static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid)
1125 idx = X509at_get_attr_by_NID(sk, nid, -1);
1126 xa = X509at_get_attr(sk, idx);
1127 return X509_ATTRIBUTE_get0_type(xa, 0);
1130 ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk)
1133 if ((astype = get_attribute(sk, NID_pkcs9_messageDigest)) == NULL)
1135 return astype->value.octet_string;
1138 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si,
1139 STACK_OF(X509_ATTRIBUTE) *sk)
1143 sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free);
1144 p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk);
1145 if (p7si->auth_attr == NULL)
1147 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1148 if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i,
1149 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1157 int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si,
1158 STACK_OF(X509_ATTRIBUTE) *sk)
1162 sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free);
1163 p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk);
1164 if (p7si->unauth_attr == NULL)
1166 for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) {
1167 if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i,
1168 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1176 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1179 return (add_attribute(&(p7si->auth_attr), nid, atrtype, value));
1182 int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype,
1185 return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value));
1188 static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype,
1191 X509_ATTRIBUTE *attr = NULL;
1194 if ((*sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
1197 if ((attr = X509_ATTRIBUTE_create(nid, atrtype, value)) == NULL)
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);