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.]
60 #include "internal/cryptlib.h"
61 #include <openssl/rand.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
65 #include <openssl/err.h>
67 static int add_attribute(STACK_OF(X509_ATTRIBUTE
) **sk
, int nid
, int atrtype
,
69 static ASN1_TYPE
*get_attribute(STACK_OF(X509_ATTRIBUTE
) *sk
, int nid
);
71 static int PKCS7_type_is_other(PKCS7
*p7
)
75 int nid
= OBJ_obj2nid(p7
->type
);
79 case NID_pkcs7_signed
:
80 case NID_pkcs7_enveloped
:
81 case NID_pkcs7_signedAndEnveloped
:
82 case NID_pkcs7_digest
:
83 case NID_pkcs7_encrypted
:
94 static ASN1_OCTET_STRING
*PKCS7_get_octet_string(PKCS7
*p7
)
96 if (PKCS7_type_is_data(p7
))
98 if (PKCS7_type_is_other(p7
) && p7
->d
.other
99 && (p7
->d
.other
->type
== V_ASN1_OCTET_STRING
))
100 return p7
->d
.other
->value
.octet_string
;
104 static int PKCS7_bio_add_digest(BIO
**pbio
, X509_ALGOR
*alg
)
108 if ((btmp
= BIO_new(BIO_f_md())) == NULL
) {
109 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST
, ERR_R_BIO_LIB
);
113 md
= EVP_get_digestbyobj(alg
->algorithm
);
115 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST
, PKCS7_R_UNKNOWN_DIGEST_TYPE
);
119 BIO_set_md(btmp
, md
);
122 else if (!BIO_push(*pbio
, btmp
)) {
123 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST
, ERR_R_BIO_LIB
);
136 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO
*ri
,
137 unsigned char *key
, int keylen
)
139 EVP_PKEY_CTX
*pctx
= NULL
;
140 EVP_PKEY
*pkey
= NULL
;
141 unsigned char *ek
= NULL
;
145 pkey
= X509_get_pubkey(ri
->cert
);
150 pctx
= EVP_PKEY_CTX_new(pkey
, NULL
);
154 if (EVP_PKEY_encrypt_init(pctx
) <= 0)
157 if (EVP_PKEY_CTX_ctrl(pctx
, -1, EVP_PKEY_OP_ENCRYPT
,
158 EVP_PKEY_CTRL_PKCS7_ENCRYPT
, 0, ri
) <= 0) {
159 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO
, PKCS7_R_CTRL_ERROR
);
163 if (EVP_PKEY_encrypt(pctx
, NULL
, &eklen
, key
, keylen
) <= 0)
166 ek
= OPENSSL_malloc(eklen
);
169 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO
, ERR_R_MALLOC_FAILURE
);
173 if (EVP_PKEY_encrypt(pctx
, ek
, &eklen
, key
, keylen
) <= 0)
176 ASN1_STRING_set0(ri
->enc_key
, ek
, eklen
);
183 EVP_PKEY_CTX_free(pctx
);
189 static int pkcs7_decrypt_rinfo(unsigned char **pek
, int *peklen
,
190 PKCS7_RECIP_INFO
*ri
, EVP_PKEY
*pkey
)
192 EVP_PKEY_CTX
*pctx
= NULL
;
193 unsigned char *ek
= NULL
;
198 pctx
= EVP_PKEY_CTX_new(pkey
, NULL
);
202 if (EVP_PKEY_decrypt_init(pctx
) <= 0)
205 if (EVP_PKEY_CTX_ctrl(pctx
, -1, EVP_PKEY_OP_DECRYPT
,
206 EVP_PKEY_CTRL_PKCS7_DECRYPT
, 0, ri
) <= 0) {
207 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO
, PKCS7_R_CTRL_ERROR
);
211 if (EVP_PKEY_decrypt(pctx
, NULL
, &eklen
,
212 ri
->enc_key
->data
, ri
->enc_key
->length
) <= 0)
215 ek
= OPENSSL_malloc(eklen
);
218 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO
, ERR_R_MALLOC_FAILURE
);
222 if (EVP_PKEY_decrypt(pctx
, ek
, &eklen
,
223 ri
->enc_key
->data
, ri
->enc_key
->length
) <= 0) {
225 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO
, ERR_R_EVP_LIB
);
231 OPENSSL_clear_free(*pek
, *peklen
);
236 EVP_PKEY_CTX_free(pctx
);
243 BIO
*PKCS7_dataInit(PKCS7
*p7
, BIO
*bio
)
246 BIO
*out
= NULL
, *btmp
= NULL
;
247 X509_ALGOR
*xa
= NULL
;
248 const EVP_CIPHER
*evp_cipher
= NULL
;
249 STACK_OF(X509_ALGOR
) *md_sk
= NULL
;
250 STACK_OF(PKCS7_RECIP_INFO
) *rsk
= NULL
;
251 X509_ALGOR
*xalg
= NULL
;
252 PKCS7_RECIP_INFO
*ri
= NULL
;
253 ASN1_OCTET_STRING
*os
= NULL
;
256 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_INVALID_NULL_POINTER
);
260 * The content field in the PKCS7 ContentInfo is optional, but that really
261 * only applies to inner content (precisely, detached signatures).
263 * When reading content, missing outer content is therefore treated as an
266 * When creating content, PKCS7_content_new() must be called before
267 * calling this method, so a NULL p7->d is always an error.
269 if (p7
->d
.ptr
== NULL
) {
270 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_NO_CONTENT
);
274 i
= OBJ_obj2nid(p7
->type
);
275 p7
->state
= PKCS7_S_HEADER
;
278 case NID_pkcs7_signed
:
279 md_sk
= p7
->d
.sign
->md_algs
;
280 os
= PKCS7_get_octet_string(p7
->d
.sign
->contents
);
282 case NID_pkcs7_signedAndEnveloped
:
283 rsk
= p7
->d
.signed_and_enveloped
->recipientinfo
;
284 md_sk
= p7
->d
.signed_and_enveloped
->md_algs
;
285 xalg
= p7
->d
.signed_and_enveloped
->enc_data
->algorithm
;
286 evp_cipher
= p7
->d
.signed_and_enveloped
->enc_data
->cipher
;
287 if (evp_cipher
== NULL
) {
288 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_CIPHER_NOT_INITIALIZED
);
292 case NID_pkcs7_enveloped
:
293 rsk
= p7
->d
.enveloped
->recipientinfo
;
294 xalg
= p7
->d
.enveloped
->enc_data
->algorithm
;
295 evp_cipher
= p7
->d
.enveloped
->enc_data
->cipher
;
296 if (evp_cipher
== NULL
) {
297 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_CIPHER_NOT_INITIALIZED
);
301 case NID_pkcs7_digest
:
302 xa
= p7
->d
.digest
->md
;
303 os
= PKCS7_get_octet_string(p7
->d
.digest
->contents
);
308 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_UNSUPPORTED_CONTENT_TYPE
);
312 for (i
= 0; i
< sk_X509_ALGOR_num(md_sk
); i
++)
313 if (!PKCS7_bio_add_digest(&out
, sk_X509_ALGOR_value(md_sk
, i
)))
316 if (xa
&& !PKCS7_bio_add_digest(&out
, xa
))
319 if (evp_cipher
!= NULL
) {
320 unsigned char key
[EVP_MAX_KEY_LENGTH
];
321 unsigned char iv
[EVP_MAX_IV_LENGTH
];
325 if ((btmp
= BIO_new(BIO_f_cipher())) == NULL
) {
326 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, ERR_R_BIO_LIB
);
329 BIO_get_cipher_ctx(btmp
, &ctx
);
330 keylen
= EVP_CIPHER_key_length(evp_cipher
);
331 ivlen
= EVP_CIPHER_iv_length(evp_cipher
);
332 xalg
->algorithm
= OBJ_nid2obj(EVP_CIPHER_type(evp_cipher
));
334 if (RAND_bytes(iv
, ivlen
) <= 0)
336 if (EVP_CipherInit_ex(ctx
, evp_cipher
, NULL
, NULL
, NULL
, 1) <= 0)
338 if (EVP_CIPHER_CTX_rand_key(ctx
, key
) <= 0)
340 if (EVP_CipherInit_ex(ctx
, NULL
, NULL
, key
, iv
, 1) <= 0)
344 if (xalg
->parameter
== NULL
) {
345 xalg
->parameter
= ASN1_TYPE_new();
346 if (xalg
->parameter
== NULL
)
349 if (EVP_CIPHER_param_to_asn1(ctx
, xalg
->parameter
) < 0)
353 /* Lets do the pub key stuff :-) */
354 for (i
= 0; i
< sk_PKCS7_RECIP_INFO_num(rsk
); i
++) {
355 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, i
);
356 if (pkcs7_encode_rinfo(ri
, key
, keylen
) <= 0)
359 OPENSSL_cleanse(key
, keylen
);
369 if (PKCS7_is_detached(p7
))
370 bio
= BIO_new(BIO_s_null());
371 else if (os
&& os
->length
> 0)
372 bio
= BIO_new_mem_buf(os
->data
, os
->length
);
374 bio
= BIO_new(BIO_s_mem());
377 BIO_set_mem_eof_return(bio
, 0);
392 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO
*ri
, X509
*pcert
)
395 ret
= X509_NAME_cmp(ri
->issuer_and_serial
->issuer
,
396 pcert
->cert_info
->issuer
);
399 return ASN1_INTEGER_cmp(pcert
->cert_info
->serialNumber
,
400 ri
->issuer_and_serial
->serial
);
404 BIO
*PKCS7_dataDecode(PKCS7
*p7
, EVP_PKEY
*pkey
, BIO
*in_bio
, X509
*pcert
)
407 BIO
*out
= NULL
, *btmp
= NULL
, *etmp
= NULL
, *bio
= NULL
;
409 ASN1_OCTET_STRING
*data_body
= NULL
;
410 const EVP_MD
*evp_md
;
411 const EVP_CIPHER
*evp_cipher
= NULL
;
412 EVP_CIPHER_CTX
*evp_ctx
= NULL
;
413 X509_ALGOR
*enc_alg
= NULL
;
414 STACK_OF(X509_ALGOR
) *md_sk
= NULL
;
415 STACK_OF(PKCS7_RECIP_INFO
) *rsk
= NULL
;
416 PKCS7_RECIP_INFO
*ri
= NULL
;
417 unsigned char *ek
= NULL
, *tkey
= NULL
;
418 int eklen
= 0, tkeylen
= 0;
421 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, PKCS7_R_INVALID_NULL_POINTER
);
425 if (p7
->d
.ptr
== NULL
) {
426 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, PKCS7_R_NO_CONTENT
);
430 i
= OBJ_obj2nid(p7
->type
);
431 p7
->state
= PKCS7_S_HEADER
;
434 case NID_pkcs7_signed
:
435 data_body
= PKCS7_get_octet_string(p7
->d
.sign
->contents
);
436 if (!PKCS7_is_detached(p7
) && data_body
== NULL
) {
437 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
438 PKCS7_R_INVALID_SIGNED_DATA_TYPE
);
441 md_sk
= p7
->d
.sign
->md_algs
;
443 case NID_pkcs7_signedAndEnveloped
:
444 rsk
= p7
->d
.signed_and_enveloped
->recipientinfo
;
445 md_sk
= p7
->d
.signed_and_enveloped
->md_algs
;
446 data_body
= p7
->d
.signed_and_enveloped
->enc_data
->enc_data
;
447 enc_alg
= p7
->d
.signed_and_enveloped
->enc_data
->algorithm
;
448 evp_cipher
= EVP_get_cipherbyobj(enc_alg
->algorithm
);
449 if (evp_cipher
== NULL
) {
450 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
451 PKCS7_R_UNSUPPORTED_CIPHER_TYPE
);
455 case NID_pkcs7_enveloped
:
456 rsk
= p7
->d
.enveloped
->recipientinfo
;
457 enc_alg
= p7
->d
.enveloped
->enc_data
->algorithm
;
458 data_body
= p7
->d
.enveloped
->enc_data
->enc_data
;
459 evp_cipher
= EVP_get_cipherbyobj(enc_alg
->algorithm
);
460 if (evp_cipher
== NULL
) {
461 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
462 PKCS7_R_UNSUPPORTED_CIPHER_TYPE
);
467 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, PKCS7_R_UNSUPPORTED_CONTENT_TYPE
);
471 /* We will be checking the signature */
473 for (i
= 0; i
< sk_X509_ALGOR_num(md_sk
); i
++) {
474 xa
= sk_X509_ALGOR_value(md_sk
, i
);
475 if ((btmp
= BIO_new(BIO_f_md())) == NULL
) {
476 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, ERR_R_BIO_LIB
);
480 j
= OBJ_obj2nid(xa
->algorithm
);
481 evp_md
= EVP_get_digestbynid(j
);
482 if (evp_md
== NULL
) {
483 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
484 PKCS7_R_UNKNOWN_DIGEST_TYPE
);
488 BIO_set_md(btmp
, evp_md
);
497 if (evp_cipher
!= NULL
) {
498 if ((etmp
= BIO_new(BIO_f_cipher())) == NULL
) {
499 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, ERR_R_BIO_LIB
);
504 * It was encrypted, we need to decrypt the secret key with the
509 * Find the recipientInfo which matches the passed certificate (if
514 for (i
= 0; i
< sk_PKCS7_RECIP_INFO_num(rsk
); i
++) {
515 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, i
);
516 if (!pkcs7_cmp_ri(ri
, pcert
))
521 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
522 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE
);
527 /* If we haven't got a certificate try each ri in turn */
530 * Always attempt to decrypt all rinfo even after success as a
531 * defence against MMA timing attacks.
533 for (i
= 0; i
< sk_PKCS7_RECIP_INFO_num(rsk
); i
++) {
534 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, i
);
536 if (pkcs7_decrypt_rinfo(&ek
, &eklen
, ri
, pkey
) < 0)
541 /* Only exit on fatal errors, not decrypt failure */
542 if (pkcs7_decrypt_rinfo(&ek
, &eklen
, ri
, pkey
) < 0)
548 BIO_get_cipher_ctx(etmp
, &evp_ctx
);
549 if (EVP_CipherInit_ex(evp_ctx
, evp_cipher
, NULL
, NULL
, NULL
, 0) <= 0)
551 if (EVP_CIPHER_asn1_to_param(evp_ctx
, enc_alg
->parameter
) < 0)
553 /* Generate random key as MMA defence */
554 tkeylen
= EVP_CIPHER_CTX_key_length(evp_ctx
);
555 tkey
= OPENSSL_malloc(tkeylen
);
558 if (EVP_CIPHER_CTX_rand_key(evp_ctx
, tkey
) <= 0)
566 if (eklen
!= EVP_CIPHER_CTX_key_length(evp_ctx
)) {
568 * Some S/MIME clients don't use the same key and effective key
569 * length. The key length is determined by the size of the
572 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx
, eklen
)) {
573 /* Use random key as MMA defence */
574 OPENSSL_clear_free(ek
, eklen
);
580 /* Clear errors so we don't leak information useful in MMA */
582 if (EVP_CipherInit_ex(evp_ctx
, NULL
, NULL
, ek
, NULL
, 0) <= 0)
585 OPENSSL_clear_free(ek
, eklen
);
587 OPENSSL_clear_free(tkey
, tkeylen
);
596 if (PKCS7_is_detached(p7
) || (in_bio
!= NULL
)) {
599 if (data_body
->length
> 0)
600 bio
= BIO_new_mem_buf(data_body
->data
, data_body
->length
);
602 bio
= BIO_new(BIO_s_mem());
603 BIO_set_mem_eof_return(bio
, 0);
613 OPENSSL_clear_free(ek
, eklen
);
614 OPENSSL_clear_free(tkey
, tkeylen
);
622 static BIO
*PKCS7_find_digest(EVP_MD_CTX
**pmd
, BIO
*bio
, int nid
)
625 bio
= BIO_find_type(bio
, BIO_TYPE_MD
);
627 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST
,
628 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST
);
631 BIO_get_md_ctx(bio
, pmd
);
633 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST
, ERR_R_INTERNAL_ERROR
);
636 if (EVP_MD_CTX_type(*pmd
) == nid
)
643 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO
*si
, EVP_MD_CTX
*mctx
)
645 unsigned char md_data
[EVP_MAX_MD_SIZE
];
648 /* Add signing time if not already present */
649 if (!PKCS7_get_signed_attribute(si
, NID_pkcs9_signingTime
)) {
650 if (!PKCS7_add0_attrib_signing_time(si
, NULL
)) {
651 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB
, ERR_R_MALLOC_FAILURE
);
657 if (!EVP_DigestFinal_ex(mctx
, md_data
, &md_len
)) {
658 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB
, ERR_R_EVP_LIB
);
661 if (!PKCS7_add1_attrib_digest(si
, md_data
, md_len
)) {
662 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB
, ERR_R_MALLOC_FAILURE
);
666 /* Now sign the attributes */
667 if (!PKCS7_SIGNER_INFO_sign(si
))
673 int PKCS7_dataFinal(PKCS7
*p7
, BIO
*bio
)
678 PKCS7_SIGNER_INFO
*si
;
679 EVP_MD_CTX
*mdc
, ctx_tmp
;
680 STACK_OF(X509_ATTRIBUTE
) *sk
;
681 STACK_OF(PKCS7_SIGNER_INFO
) *si_sk
= NULL
;
682 ASN1_OCTET_STRING
*os
= NULL
;
685 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, PKCS7_R_INVALID_NULL_POINTER
);
689 if (p7
->d
.ptr
== NULL
) {
690 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, PKCS7_R_NO_CONTENT
);
694 EVP_MD_CTX_init(&ctx_tmp
);
695 i
= OBJ_obj2nid(p7
->type
);
696 p7
->state
= PKCS7_S_HEADER
;
702 case NID_pkcs7_signedAndEnveloped
:
703 /* XXXXXXXXXXXXXXXX */
704 si_sk
= p7
->d
.signed_and_enveloped
->signer_info
;
705 os
= p7
->d
.signed_and_enveloped
->enc_data
->enc_data
;
707 os
= ASN1_OCTET_STRING_new();
709 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, ERR_R_MALLOC_FAILURE
);
712 p7
->d
.signed_and_enveloped
->enc_data
->enc_data
= os
;
715 case NID_pkcs7_enveloped
:
716 /* XXXXXXXXXXXXXXXX */
717 os
= p7
->d
.enveloped
->enc_data
->enc_data
;
719 os
= ASN1_OCTET_STRING_new();
721 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, ERR_R_MALLOC_FAILURE
);
724 p7
->d
.enveloped
->enc_data
->enc_data
= os
;
727 case NID_pkcs7_signed
:
728 si_sk
= p7
->d
.sign
->signer_info
;
729 os
= PKCS7_get_octet_string(p7
->d
.sign
->contents
);
730 /* If detached data then the content is excluded */
731 if (PKCS7_type_is_data(p7
->d
.sign
->contents
) && p7
->detached
) {
732 ASN1_OCTET_STRING_free(os
);
734 p7
->d
.sign
->contents
->d
.data
= NULL
;
738 case NID_pkcs7_digest
:
739 os
= PKCS7_get_octet_string(p7
->d
.digest
->contents
);
740 /* If detached data then the content is excluded */
741 if (PKCS7_type_is_data(p7
->d
.digest
->contents
) && p7
->detached
) {
742 ASN1_OCTET_STRING_free(os
);
744 p7
->d
.digest
->contents
->d
.data
= NULL
;
749 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, PKCS7_R_UNSUPPORTED_CONTENT_TYPE
);
754 for (i
= 0; i
< sk_PKCS7_SIGNER_INFO_num(si_sk
); i
++) {
755 si
= sk_PKCS7_SIGNER_INFO_value(si_sk
, i
);
756 if (si
->pkey
== NULL
)
759 j
= OBJ_obj2nid(si
->digest_alg
->algorithm
);
763 btmp
= PKCS7_find_digest(&mdc
, btmp
, j
);
769 * We now have the EVP_MD_CTX, lets do the signing.
771 if (!EVP_MD_CTX_copy_ex(&ctx_tmp
, mdc
))
777 * If there are attributes, we add the digest attribute and only
778 * sign the attributes
780 if (sk_X509_ATTRIBUTE_num(sk
) > 0) {
781 if (!do_pkcs7_signed_attrib(si
, &ctx_tmp
))
784 unsigned char *abuf
= NULL
;
785 unsigned int abuflen
;
786 abuflen
= EVP_PKEY_size(si
->pkey
);
787 abuf
= OPENSSL_malloc(abuflen
);
791 if (!EVP_SignFinal(&ctx_tmp
, abuf
, &abuflen
, si
->pkey
)) {
792 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, ERR_R_EVP_LIB
);
795 ASN1_STRING_set0(si
->enc_digest
, abuf
, abuflen
);
798 } else if (i
== NID_pkcs7_digest
) {
799 unsigned char md_data
[EVP_MAX_MD_SIZE
];
801 if (!PKCS7_find_digest(&mdc
, bio
,
802 OBJ_obj2nid(p7
->d
.digest
->md
->algorithm
)))
804 if (!EVP_DigestFinal_ex(mdc
, md_data
, &md_len
))
806 ASN1_OCTET_STRING_set(p7
->d
.digest
->digest
, md_data
, md_len
);
809 if (!PKCS7_is_detached(p7
)) {
811 * NOTE(emilia): I think we only reach os == NULL here because detached
812 * digested data support is broken.
816 if (!(os
->flags
& ASN1_STRING_FLAG_NDEF
)) {
819 btmp
= BIO_find_type(bio
, BIO_TYPE_MEM
);
821 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, PKCS7_R_UNABLE_TO_FIND_MEM_BIO
);
824 contlen
= BIO_get_mem_data(btmp
, &cont
);
826 * Mark the BIO read only then we can use its copy of the data
827 * instead of making an extra copy.
829 BIO_set_flags(btmp
, BIO_FLAGS_MEM_RDONLY
);
830 BIO_set_mem_eof_return(btmp
, 0);
831 ASN1_STRING_set0(os
, (unsigned char *)cont
, contlen
);
836 EVP_MD_CTX_cleanup(&ctx_tmp
);
840 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO
*si
)
844 unsigned char *abuf
= NULL
;
847 const EVP_MD
*md
= NULL
;
849 md
= EVP_get_digestbyobj(si
->digest_alg
->algorithm
);
853 EVP_MD_CTX_init(&mctx
);
854 if (EVP_DigestSignInit(&mctx
, &pctx
, md
, NULL
, si
->pkey
) <= 0)
857 if (EVP_PKEY_CTX_ctrl(pctx
, -1, EVP_PKEY_OP_SIGN
,
858 EVP_PKEY_CTRL_PKCS7_SIGN
, 0, si
) <= 0) {
859 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN
, PKCS7_R_CTRL_ERROR
);
863 alen
= ASN1_item_i2d((ASN1_VALUE
*)si
->auth_attr
, &abuf
,
864 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN
));
867 if (EVP_DigestSignUpdate(&mctx
, abuf
, alen
) <= 0)
871 if (EVP_DigestSignFinal(&mctx
, NULL
, &siglen
) <= 0)
873 abuf
= OPENSSL_malloc(siglen
);
876 if (EVP_DigestSignFinal(&mctx
, abuf
, &siglen
) <= 0)
879 if (EVP_PKEY_CTX_ctrl(pctx
, -1, EVP_PKEY_OP_SIGN
,
880 EVP_PKEY_CTRL_PKCS7_SIGN
, 1, si
) <= 0) {
881 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN
, PKCS7_R_CTRL_ERROR
);
885 EVP_MD_CTX_cleanup(&mctx
);
887 ASN1_STRING_set0(si
->enc_digest
, abuf
, siglen
);
893 EVP_MD_CTX_cleanup(&mctx
);
898 int PKCS7_dataVerify(X509_STORE
*cert_store
, X509_STORE_CTX
*ctx
, BIO
*bio
,
899 PKCS7
*p7
, PKCS7_SIGNER_INFO
*si
)
901 PKCS7_ISSUER_AND_SERIAL
*ias
;
903 STACK_OF(X509
) *cert
;
907 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, PKCS7_R_INVALID_NULL_POINTER
);
911 if (p7
->d
.ptr
== NULL
) {
912 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, PKCS7_R_NO_CONTENT
);
916 if (PKCS7_type_is_signed(p7
)) {
917 cert
= p7
->d
.sign
->cert
;
918 } else if (PKCS7_type_is_signedAndEnveloped(p7
)) {
919 cert
= p7
->d
.signed_and_enveloped
->cert
;
921 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, PKCS7_R_WRONG_PKCS7_TYPE
);
924 /* XXXXXXXXXXXXXXXXXXXXXXX */
925 ias
= si
->issuer_and_serial
;
927 x509
= X509_find_by_issuer_and_serial(cert
, ias
->issuer
, ias
->serial
);
929 /* were we able to find the cert in passed to us */
931 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
,
932 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE
);
937 if (!X509_STORE_CTX_init(ctx
, cert_store
, x509
, cert
)) {
938 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, ERR_R_X509_LIB
);
941 X509_STORE_CTX_set_purpose(ctx
, X509_PURPOSE_SMIME_SIGN
);
942 i
= X509_verify_cert(ctx
);
944 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, ERR_R_X509_LIB
);
945 X509_STORE_CTX_cleanup(ctx
);
948 X509_STORE_CTX_cleanup(ctx
);
950 return PKCS7_signatureVerify(bio
, p7
, si
, x509
);
955 int PKCS7_signatureVerify(BIO
*bio
, PKCS7
*p7
, PKCS7_SIGNER_INFO
*si
,
958 ASN1_OCTET_STRING
*os
;
959 EVP_MD_CTX mdc_tmp
, *mdc
;
962 STACK_OF(X509_ATTRIBUTE
) *sk
;
966 EVP_MD_CTX_init(&mdc_tmp
);
968 if (!PKCS7_type_is_signed(p7
) && !PKCS7_type_is_signedAndEnveloped(p7
)) {
969 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, PKCS7_R_WRONG_PKCS7_TYPE
);
973 md_type
= OBJ_obj2nid(si
->digest_alg
->algorithm
);
977 if ((btmp
== NULL
) ||
978 ((btmp
= BIO_find_type(btmp
, BIO_TYPE_MD
)) == NULL
)) {
979 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
,
980 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST
);
983 BIO_get_md_ctx(btmp
, &mdc
);
985 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, ERR_R_INTERNAL_ERROR
);
988 if (EVP_MD_CTX_type(mdc
) == md_type
)
991 * Workaround for some broken clients that put the signature OID
992 * instead of the digest OID in digest_alg->algorithm
994 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc
)) == md_type
)
996 btmp
= BIO_next(btmp
);
1000 * mdc is the digest ctx that we want, unless there are attributes, in
1001 * which case the digest is the signed attributes
1003 if (!EVP_MD_CTX_copy_ex(&mdc_tmp
, mdc
))
1007 if ((sk
!= NULL
) && (sk_X509_ATTRIBUTE_num(sk
) != 0)) {
1008 unsigned char md_dat
[EVP_MAX_MD_SIZE
], *abuf
= NULL
;
1009 unsigned int md_len
;
1011 ASN1_OCTET_STRING
*message_digest
;
1013 if (!EVP_DigestFinal_ex(&mdc_tmp
, md_dat
, &md_len
))
1015 message_digest
= PKCS7_digest_from_attributes(sk
);
1016 if (!message_digest
) {
1017 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
,
1018 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST
);
1021 if ((message_digest
->length
!= (int)md_len
) ||
1022 (memcmp(message_digest
->data
, md_dat
, md_len
))) {
1023 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, PKCS7_R_DIGEST_FAILURE
);
1028 if (!EVP_VerifyInit_ex(&mdc_tmp
, EVP_get_digestbynid(md_type
), NULL
))
1031 alen
= ASN1_item_i2d((ASN1_VALUE
*)sk
, &abuf
,
1032 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY
));
1034 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, ERR_R_ASN1_LIB
);
1038 if (!EVP_VerifyUpdate(&mdc_tmp
, abuf
, alen
))
1044 os
= si
->enc_digest
;
1045 pkey
= X509_get_pubkey(x509
);
1051 i
= EVP_VerifyFinal(&mdc_tmp
, os
->data
, os
->length
, pkey
);
1052 EVP_PKEY_free(pkey
);
1054 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, PKCS7_R_SIGNATURE_FAILURE
);
1060 EVP_MD_CTX_cleanup(&mdc_tmp
);
1064 PKCS7_ISSUER_AND_SERIAL
*PKCS7_get_issuer_and_serial(PKCS7
*p7
, int idx
)
1066 STACK_OF(PKCS7_RECIP_INFO
) *rsk
;
1067 PKCS7_RECIP_INFO
*ri
;
1070 i
= OBJ_obj2nid(p7
->type
);
1071 if (i
!= NID_pkcs7_signedAndEnveloped
)
1073 if (p7
->d
.signed_and_enveloped
== NULL
)
1075 rsk
= p7
->d
.signed_and_enveloped
->recipientinfo
;
1078 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, 0);
1079 if (sk_PKCS7_RECIP_INFO_num(rsk
) <= idx
)
1081 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, idx
);
1082 return (ri
->issuer_and_serial
);
1085 ASN1_TYPE
*PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO
*si
, int nid
)
1087 return (get_attribute(si
->auth_attr
, nid
));
1090 ASN1_TYPE
*PKCS7_get_attribute(PKCS7_SIGNER_INFO
*si
, int nid
)
1092 return (get_attribute(si
->unauth_attr
, nid
));
1095 static ASN1_TYPE
*get_attribute(STACK_OF(X509_ATTRIBUTE
) *sk
, int nid
)
1099 idx
= X509at_get_attr_by_NID(sk
, nid
, -1);
1100 xa
= X509at_get_attr(sk
, idx
);
1101 return X509_ATTRIBUTE_get0_type(xa
, 0);
1104 ASN1_OCTET_STRING
*PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE
) *sk
)
1107 if ((astype
= get_attribute(sk
, NID_pkcs9_messageDigest
)) == NULL
)
1109 return astype
->value
.octet_string
;
1112 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO
*p7si
,
1113 STACK_OF(X509_ATTRIBUTE
) *sk
)
1117 sk_X509_ATTRIBUTE_pop_free(p7si
->auth_attr
, X509_ATTRIBUTE_free
);
1118 p7si
->auth_attr
= sk_X509_ATTRIBUTE_dup(sk
);
1119 if (p7si
->auth_attr
== NULL
)
1121 for (i
= 0; i
< sk_X509_ATTRIBUTE_num(sk
); i
++) {
1122 if ((sk_X509_ATTRIBUTE_set(p7si
->auth_attr
, i
,
1123 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1131 int PKCS7_set_attributes(PKCS7_SIGNER_INFO
*p7si
,
1132 STACK_OF(X509_ATTRIBUTE
) *sk
)
1136 sk_X509_ATTRIBUTE_pop_free(p7si
->unauth_attr
, X509_ATTRIBUTE_free
);
1137 p7si
->unauth_attr
= sk_X509_ATTRIBUTE_dup(sk
);
1138 if (p7si
->unauth_attr
== NULL
)
1140 for (i
= 0; i
< sk_X509_ATTRIBUTE_num(sk
); i
++) {
1141 if ((sk_X509_ATTRIBUTE_set(p7si
->unauth_attr
, i
,
1142 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1150 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO
*p7si
, int nid
, int atrtype
,
1153 return (add_attribute(&(p7si
->auth_attr
), nid
, atrtype
, value
));
1156 int PKCS7_add_attribute(PKCS7_SIGNER_INFO
*p7si
, int nid
, int atrtype
,
1159 return (add_attribute(&(p7si
->unauth_attr
), nid
, atrtype
, value
));
1162 static int add_attribute(STACK_OF(X509_ATTRIBUTE
) **sk
, int nid
, int atrtype
,
1165 X509_ATTRIBUTE
*attr
= NULL
;
1168 if ((*sk
= sk_X509_ATTRIBUTE_new_null()) == NULL
)
1171 if ((attr
= X509_ATTRIBUTE_create(nid
, atrtype
, value
)) == NULL
)
1173 if (!sk_X509_ATTRIBUTE_push(*sk
, attr
)) {
1174 X509_ATTRIBUTE_free(attr
);
1180 for (i
= 0; i
< sk_X509_ATTRIBUTE_num(*sk
); i
++) {
1181 attr
= sk_X509_ATTRIBUTE_value(*sk
, i
);
1182 if (OBJ_obj2nid(X509_ATTRIBUTE_get0_object(attr
)) == nid
) {
1183 X509_ATTRIBUTE_free(attr
);
1184 attr
= X509_ATTRIBUTE_create(nid
, atrtype
, value
);
1187 if (!sk_X509_ATTRIBUTE_set(*sk
, i
, attr
)) {
1188 X509_ATTRIBUTE_free(attr
);