1 /* crypto/pkcs7/pk7_doit.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
61 #include <openssl/rand.h>
62 #include <openssl/objects.h>
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
65 #include <openssl/err.h>
67 static int add_attribute(STACK_OF(X509_ATTRIBUTE
) **sk
, int nid
, int atrtype
,
69 static ASN1_TYPE
*get_attribute(STACK_OF(X509_ATTRIBUTE
) *sk
, int nid
);
71 static int PKCS7_type_is_other(PKCS7
*p7
)
75 int nid
= OBJ_obj2nid(p7
->type
);
79 case NID_pkcs7_signed
:
80 case NID_pkcs7_enveloped
:
81 case NID_pkcs7_signedAndEnveloped
:
82 case NID_pkcs7_digest
:
83 case NID_pkcs7_encrypted
:
94 static ASN1_OCTET_STRING
*PKCS7_get_octet_string(PKCS7
*p7
)
96 if (PKCS7_type_is_data(p7
))
98 if (PKCS7_type_is_other(p7
) && p7
->d
.other
99 && (p7
->d
.other
->type
== V_ASN1_OCTET_STRING
))
100 return p7
->d
.other
->value
.octet_string
;
104 static int PKCS7_bio_add_digest(BIO
**pbio
, X509_ALGOR
*alg
)
108 if ((btmp
= BIO_new(BIO_f_md())) == NULL
) {
109 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST
, ERR_R_BIO_LIB
);
113 md
= EVP_get_digestbyobj(alg
->algorithm
);
115 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST
, PKCS7_R_UNKNOWN_DIGEST_TYPE
);
119 BIO_set_md(btmp
, md
);
122 else if (!BIO_push(*pbio
, btmp
)) {
123 PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST
, ERR_R_BIO_LIB
);
137 static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO
*ri
,
138 unsigned char *key
, int keylen
)
140 EVP_PKEY_CTX
*pctx
= NULL
;
141 EVP_PKEY
*pkey
= NULL
;
142 unsigned char *ek
= NULL
;
146 pkey
= X509_get_pubkey(ri
->cert
);
151 pctx
= EVP_PKEY_CTX_new(pkey
, NULL
);
155 if (EVP_PKEY_encrypt_init(pctx
) <= 0)
158 if (EVP_PKEY_CTX_ctrl(pctx
, -1, EVP_PKEY_OP_ENCRYPT
,
159 EVP_PKEY_CTRL_PKCS7_ENCRYPT
, 0, ri
) <= 0) {
160 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO
, PKCS7_R_CTRL_ERROR
);
164 if (EVP_PKEY_encrypt(pctx
, NULL
, &eklen
, key
, keylen
) <= 0)
167 ek
= OPENSSL_malloc(eklen
);
170 PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO
, ERR_R_MALLOC_FAILURE
);
174 if (EVP_PKEY_encrypt(pctx
, ek
, &eklen
, key
, keylen
) <= 0)
177 ASN1_STRING_set0(ri
->enc_key
, ek
, eklen
);
186 EVP_PKEY_CTX_free(pctx
);
193 static int pkcs7_decrypt_rinfo(unsigned char **pek
, int *peklen
,
194 PKCS7_RECIP_INFO
*ri
, EVP_PKEY
*pkey
)
196 EVP_PKEY_CTX
*pctx
= NULL
;
197 unsigned char *ek
= NULL
;
202 pctx
= EVP_PKEY_CTX_new(pkey
, NULL
);
206 if (EVP_PKEY_decrypt_init(pctx
) <= 0)
209 if (EVP_PKEY_CTX_ctrl(pctx
, -1, EVP_PKEY_OP_DECRYPT
,
210 EVP_PKEY_CTRL_PKCS7_DECRYPT
, 0, ri
) <= 0) {
211 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO
, PKCS7_R_CTRL_ERROR
);
215 if (EVP_PKEY_decrypt(pctx
, NULL
, &eklen
,
216 ri
->enc_key
->data
, ri
->enc_key
->length
) <= 0)
219 ek
= OPENSSL_malloc(eklen
);
222 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO
, ERR_R_MALLOC_FAILURE
);
226 if (EVP_PKEY_decrypt(pctx
, ek
, &eklen
,
227 ri
->enc_key
->data
, ri
->enc_key
->length
) <= 0) {
229 PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO
, ERR_R_EVP_LIB
);
236 OPENSSL_cleanse(*pek
, *peklen
);
245 EVP_PKEY_CTX_free(pctx
);
252 BIO
*PKCS7_dataInit(PKCS7
*p7
, BIO
*bio
)
255 BIO
*out
= NULL
, *btmp
= NULL
;
256 X509_ALGOR
*xa
= NULL
;
257 const EVP_CIPHER
*evp_cipher
= NULL
;
258 STACK_OF(X509_ALGOR
) *md_sk
= NULL
;
259 STACK_OF(PKCS7_RECIP_INFO
) *rsk
= NULL
;
260 X509_ALGOR
*xalg
= NULL
;
261 PKCS7_RECIP_INFO
*ri
= NULL
;
262 ASN1_OCTET_STRING
*os
= NULL
;
265 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_INVALID_NULL_POINTER
);
269 * The content field in the PKCS7 ContentInfo is optional, but that really
270 * only applies to inner content (precisely, detached signatures).
272 * When reading content, missing outer content is therefore treated as an
275 * When creating content, PKCS7_content_new() must be called before
276 * calling this method, so a NULL p7->d is always an error.
278 if (p7
->d
.ptr
== NULL
) {
279 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_NO_CONTENT
);
283 i
= OBJ_obj2nid(p7
->type
);
284 p7
->state
= PKCS7_S_HEADER
;
287 case NID_pkcs7_signed
:
288 md_sk
= p7
->d
.sign
->md_algs
;
289 os
= PKCS7_get_octet_string(p7
->d
.sign
->contents
);
291 case NID_pkcs7_signedAndEnveloped
:
292 rsk
= p7
->d
.signed_and_enveloped
->recipientinfo
;
293 md_sk
= p7
->d
.signed_and_enveloped
->md_algs
;
294 xalg
= p7
->d
.signed_and_enveloped
->enc_data
->algorithm
;
295 evp_cipher
= p7
->d
.signed_and_enveloped
->enc_data
->cipher
;
296 if (evp_cipher
== NULL
) {
297 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_CIPHER_NOT_INITIALIZED
);
301 case NID_pkcs7_enveloped
:
302 rsk
= p7
->d
.enveloped
->recipientinfo
;
303 xalg
= p7
->d
.enveloped
->enc_data
->algorithm
;
304 evp_cipher
= p7
->d
.enveloped
->enc_data
->cipher
;
305 if (evp_cipher
== NULL
) {
306 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_CIPHER_NOT_INITIALIZED
);
310 case NID_pkcs7_digest
:
311 xa
= p7
->d
.digest
->md
;
312 os
= PKCS7_get_octet_string(p7
->d
.digest
->contents
);
317 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, PKCS7_R_UNSUPPORTED_CONTENT_TYPE
);
321 for (i
= 0; i
< sk_X509_ALGOR_num(md_sk
); i
++)
322 if (!PKCS7_bio_add_digest(&out
, sk_X509_ALGOR_value(md_sk
, i
)))
325 if (xa
&& !PKCS7_bio_add_digest(&out
, xa
))
328 if (evp_cipher
!= NULL
) {
329 unsigned char key
[EVP_MAX_KEY_LENGTH
];
330 unsigned char iv
[EVP_MAX_IV_LENGTH
];
334 if ((btmp
= BIO_new(BIO_f_cipher())) == NULL
) {
335 PKCS7err(PKCS7_F_PKCS7_DATAINIT
, ERR_R_BIO_LIB
);
338 BIO_get_cipher_ctx(btmp
, &ctx
);
339 keylen
= EVP_CIPHER_key_length(evp_cipher
);
340 ivlen
= EVP_CIPHER_iv_length(evp_cipher
);
341 xalg
->algorithm
= OBJ_nid2obj(EVP_CIPHER_type(evp_cipher
));
343 if (RAND_bytes(iv
, ivlen
) <= 0)
345 if (EVP_CipherInit_ex(ctx
, evp_cipher
, NULL
, NULL
, NULL
, 1) <= 0)
347 if (EVP_CIPHER_CTX_rand_key(ctx
, key
) <= 0)
349 if (EVP_CipherInit_ex(ctx
, NULL
, NULL
, key
, iv
, 1) <= 0)
353 if (xalg
->parameter
== NULL
) {
354 xalg
->parameter
= ASN1_TYPE_new();
355 if (xalg
->parameter
== NULL
)
358 if (EVP_CIPHER_param_to_asn1(ctx
, xalg
->parameter
) < 0)
362 /* Lets do the pub key stuff :-) */
363 for (i
= 0; i
< sk_PKCS7_RECIP_INFO_num(rsk
); i
++) {
364 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, i
);
365 if (pkcs7_encode_rinfo(ri
, key
, keylen
) <= 0)
368 OPENSSL_cleanse(key
, keylen
);
378 if (PKCS7_is_detached(p7
)) {
379 bio
= BIO_new(BIO_s_null());
380 } else if (os
&& os
->length
> 0) {
381 bio
= BIO_new_mem_buf(os
->data
, os
->length
);
383 bio
= BIO_new(BIO_s_mem());
386 BIO_set_mem_eof_return(bio
, 0);
407 static int pkcs7_cmp_ri(PKCS7_RECIP_INFO
*ri
, X509
*pcert
)
410 ret
= X509_NAME_cmp(ri
->issuer_and_serial
->issuer
,
411 pcert
->cert_info
->issuer
);
414 return M_ASN1_INTEGER_cmp(pcert
->cert_info
->serialNumber
,
415 ri
->issuer_and_serial
->serial
);
419 BIO
*PKCS7_dataDecode(PKCS7
*p7
, EVP_PKEY
*pkey
, BIO
*in_bio
, X509
*pcert
)
422 BIO
*out
= NULL
, *btmp
= NULL
, *etmp
= NULL
, *bio
= NULL
;
424 ASN1_OCTET_STRING
*data_body
= NULL
;
425 const EVP_MD
*evp_md
;
426 const EVP_CIPHER
*evp_cipher
= NULL
;
427 EVP_CIPHER_CTX
*evp_ctx
= NULL
;
428 X509_ALGOR
*enc_alg
= NULL
;
429 STACK_OF(X509_ALGOR
) *md_sk
= NULL
;
430 STACK_OF(PKCS7_RECIP_INFO
) *rsk
= NULL
;
431 PKCS7_RECIP_INFO
*ri
= NULL
;
432 unsigned char *ek
= NULL
, *tkey
= NULL
;
433 int eklen
= 0, tkeylen
= 0;
436 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, PKCS7_R_INVALID_NULL_POINTER
);
440 if (p7
->d
.ptr
== NULL
) {
441 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, PKCS7_R_NO_CONTENT
);
445 i
= OBJ_obj2nid(p7
->type
);
446 p7
->state
= PKCS7_S_HEADER
;
449 case NID_pkcs7_signed
:
451 * p7->d.sign->contents is a PKCS7 structure consisting of a contentType
452 * field and optional content.
453 * data_body is NULL if that structure has no (=detached) content
454 * or if the contentType is wrong (i.e., not "data").
456 data_body
= PKCS7_get_octet_string(p7
->d
.sign
->contents
);
457 if (!PKCS7_is_detached(p7
) && data_body
== NULL
) {
458 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
459 PKCS7_R_INVALID_SIGNED_DATA_TYPE
);
462 md_sk
= p7
->d
.sign
->md_algs
;
464 case NID_pkcs7_signedAndEnveloped
:
465 rsk
= p7
->d
.signed_and_enveloped
->recipientinfo
;
466 md_sk
= p7
->d
.signed_and_enveloped
->md_algs
;
467 /* data_body is NULL if the optional EncryptedContent is missing. */
468 data_body
= p7
->d
.signed_and_enveloped
->enc_data
->enc_data
;
469 enc_alg
= p7
->d
.signed_and_enveloped
->enc_data
->algorithm
;
470 evp_cipher
= EVP_get_cipherbyobj(enc_alg
->algorithm
);
471 if (evp_cipher
== NULL
) {
472 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
473 PKCS7_R_UNSUPPORTED_CIPHER_TYPE
);
477 case NID_pkcs7_enveloped
:
478 rsk
= p7
->d
.enveloped
->recipientinfo
;
479 enc_alg
= p7
->d
.enveloped
->enc_data
->algorithm
;
480 /* data_body is NULL if the optional EncryptedContent is missing. */
481 data_body
= p7
->d
.enveloped
->enc_data
->enc_data
;
482 evp_cipher
= EVP_get_cipherbyobj(enc_alg
->algorithm
);
483 if (evp_cipher
== NULL
) {
484 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
485 PKCS7_R_UNSUPPORTED_CIPHER_TYPE
);
490 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, PKCS7_R_UNSUPPORTED_CONTENT_TYPE
);
494 /* Detached content must be supplied via in_bio instead. */
495 if (data_body
== NULL
&& in_bio
== NULL
) {
496 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, PKCS7_R_NO_CONTENT
);
500 /* We will be checking the signature */
502 for (i
= 0; i
< sk_X509_ALGOR_num(md_sk
); i
++) {
503 xa
= sk_X509_ALGOR_value(md_sk
, i
);
504 if ((btmp
= BIO_new(BIO_f_md())) == NULL
) {
505 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, ERR_R_BIO_LIB
);
509 j
= OBJ_obj2nid(xa
->algorithm
);
510 evp_md
= EVP_get_digestbynid(j
);
511 if (evp_md
== NULL
) {
512 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
513 PKCS7_R_UNKNOWN_DIGEST_TYPE
);
517 BIO_set_md(btmp
, evp_md
);
526 if (evp_cipher
!= NULL
) {
528 unsigned char key
[EVP_MAX_KEY_LENGTH
];
529 unsigned char iv
[EVP_MAX_IV_LENGTH
];
536 if ((etmp
= BIO_new(BIO_f_cipher())) == NULL
) {
537 PKCS7err(PKCS7_F_PKCS7_DATADECODE
, ERR_R_BIO_LIB
);
542 * It was encrypted, we need to decrypt the secret key with the
547 * Find the recipientInfo which matches the passed certificate (if
552 for (i
= 0; i
< sk_PKCS7_RECIP_INFO_num(rsk
); i
++) {
553 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, i
);
554 if (!pkcs7_cmp_ri(ri
, pcert
))
559 PKCS7err(PKCS7_F_PKCS7_DATADECODE
,
560 PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE
);
565 /* If we haven't got a certificate try each ri in turn */
568 * Always attempt to decrypt all rinfo even after sucess as a
569 * defence against MMA timing attacks.
571 for (i
= 0; i
< sk_PKCS7_RECIP_INFO_num(rsk
); i
++) {
572 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, i
);
574 if (pkcs7_decrypt_rinfo(&ek
, &eklen
, ri
, pkey
) < 0)
579 /* Only exit on fatal errors, not decrypt failure */
580 if (pkcs7_decrypt_rinfo(&ek
, &eklen
, ri
, pkey
) < 0)
586 BIO_get_cipher_ctx(etmp
, &evp_ctx
);
587 if (EVP_CipherInit_ex(evp_ctx
, evp_cipher
, NULL
, NULL
, NULL
, 0) <= 0)
589 if (EVP_CIPHER_asn1_to_param(evp_ctx
, enc_alg
->parameter
) < 0)
591 /* Generate random key as MMA defence */
592 tkeylen
= EVP_CIPHER_CTX_key_length(evp_ctx
);
593 tkey
= OPENSSL_malloc(tkeylen
);
596 if (EVP_CIPHER_CTX_rand_key(evp_ctx
, tkey
) <= 0)
604 if (eklen
!= EVP_CIPHER_CTX_key_length(evp_ctx
)) {
606 * Some S/MIME clients don't use the same key and effective key
607 * length. The key length is determined by the size of the
610 if (!EVP_CIPHER_CTX_set_key_length(evp_ctx
, eklen
)) {
611 /* Use random key as MMA defence */
612 OPENSSL_cleanse(ek
, eklen
);
619 /* Clear errors so we don't leak information useful in MMA */
621 if (EVP_CipherInit_ex(evp_ctx
, NULL
, NULL
, ek
, NULL
, 0) <= 0)
625 OPENSSL_cleanse(ek
, eklen
);
630 OPENSSL_cleanse(tkey
, tkeylen
);
642 if (in_bio
!= NULL
) {
646 bio
= BIO_new(BIO_s_mem());
650 * We need to set this so that when we have read all the data, the
651 * encrypt BIO, if present, will read EOF and encode the last few
654 BIO_set_mem_eof_return(bio
, 0);
656 if (data_body
->length
> 0)
657 BIO_write(bio
, (char *)data_body
->data
, data_body
->length
);
659 if (data_body
->length
> 0)
660 bio
= BIO_new_mem_buf(data_body
->data
, data_body
->length
);
662 bio
= BIO_new(BIO_s_mem());
665 BIO_set_mem_eof_return(bio
, 0);
677 OPENSSL_cleanse(ek
, eklen
);
681 OPENSSL_cleanse(tkey
, tkeylen
);
697 static BIO
*PKCS7_find_digest(EVP_MD_CTX
**pmd
, BIO
*bio
, int nid
)
700 bio
= BIO_find_type(bio
, BIO_TYPE_MD
);
702 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST
,
703 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST
);
706 BIO_get_md_ctx(bio
, pmd
);
708 PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST
, ERR_R_INTERNAL_ERROR
);
711 if (EVP_MD_CTX_type(*pmd
) == nid
)
718 static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO
*si
, EVP_MD_CTX
*mctx
)
720 unsigned char md_data
[EVP_MAX_MD_SIZE
];
723 /* Add signing time if not already present */
724 if (!PKCS7_get_signed_attribute(si
, NID_pkcs9_signingTime
)) {
725 if (!PKCS7_add0_attrib_signing_time(si
, NULL
)) {
726 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB
, ERR_R_MALLOC_FAILURE
);
732 if (!EVP_DigestFinal_ex(mctx
, md_data
, &md_len
)) {
733 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB
, ERR_R_EVP_LIB
);
736 if (!PKCS7_add1_attrib_digest(si
, md_data
, md_len
)) {
737 PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB
, ERR_R_MALLOC_FAILURE
);
741 /* Now sign the attributes */
742 if (!PKCS7_SIGNER_INFO_sign(si
))
748 int PKCS7_dataFinal(PKCS7
*p7
, BIO
*bio
)
753 PKCS7_SIGNER_INFO
*si
;
754 EVP_MD_CTX
*mdc
, ctx_tmp
;
755 STACK_OF(X509_ATTRIBUTE
) *sk
;
756 STACK_OF(PKCS7_SIGNER_INFO
) *si_sk
= NULL
;
757 ASN1_OCTET_STRING
*os
= NULL
;
760 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, PKCS7_R_INVALID_NULL_POINTER
);
764 if (p7
->d
.ptr
== NULL
) {
765 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, PKCS7_R_NO_CONTENT
);
769 EVP_MD_CTX_init(&ctx_tmp
);
770 i
= OBJ_obj2nid(p7
->type
);
771 p7
->state
= PKCS7_S_HEADER
;
777 case NID_pkcs7_signedAndEnveloped
:
778 /* XXXXXXXXXXXXXXXX */
779 si_sk
= p7
->d
.signed_and_enveloped
->signer_info
;
780 os
= p7
->d
.signed_and_enveloped
->enc_data
->enc_data
;
782 os
= M_ASN1_OCTET_STRING_new();
784 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, ERR_R_MALLOC_FAILURE
);
787 p7
->d
.signed_and_enveloped
->enc_data
->enc_data
= os
;
790 case NID_pkcs7_enveloped
:
791 /* XXXXXXXXXXXXXXXX */
792 os
= p7
->d
.enveloped
->enc_data
->enc_data
;
794 os
= M_ASN1_OCTET_STRING_new();
796 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, ERR_R_MALLOC_FAILURE
);
799 p7
->d
.enveloped
->enc_data
->enc_data
= os
;
802 case NID_pkcs7_signed
:
803 si_sk
= p7
->d
.sign
->signer_info
;
804 os
= PKCS7_get_octet_string(p7
->d
.sign
->contents
);
805 /* If detached data then the content is excluded */
806 if (PKCS7_type_is_data(p7
->d
.sign
->contents
) && p7
->detached
) {
807 M_ASN1_OCTET_STRING_free(os
);
809 p7
->d
.sign
->contents
->d
.data
= NULL
;
813 case NID_pkcs7_digest
:
814 os
= PKCS7_get_octet_string(p7
->d
.digest
->contents
);
815 /* If detached data then the content is excluded */
816 if (PKCS7_type_is_data(p7
->d
.digest
->contents
) && p7
->detached
) {
817 M_ASN1_OCTET_STRING_free(os
);
819 p7
->d
.digest
->contents
->d
.data
= NULL
;
824 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, PKCS7_R_UNSUPPORTED_CONTENT_TYPE
);
829 for (i
= 0; i
< sk_PKCS7_SIGNER_INFO_num(si_sk
); i
++) {
830 si
= sk_PKCS7_SIGNER_INFO_value(si_sk
, i
);
831 if (si
->pkey
== NULL
)
834 j
= OBJ_obj2nid(si
->digest_alg
->algorithm
);
838 btmp
= PKCS7_find_digest(&mdc
, btmp
, j
);
844 * We now have the EVP_MD_CTX, lets do the signing.
846 if (!EVP_MD_CTX_copy_ex(&ctx_tmp
, mdc
))
852 * If there are attributes, we add the digest attribute and only
853 * sign the attributes
855 if (sk_X509_ATTRIBUTE_num(sk
) > 0) {
856 if (!do_pkcs7_signed_attrib(si
, &ctx_tmp
))
859 unsigned char *abuf
= NULL
;
860 unsigned int abuflen
;
861 abuflen
= EVP_PKEY_size(si
->pkey
);
862 abuf
= OPENSSL_malloc(abuflen
);
866 if (!EVP_SignFinal(&ctx_tmp
, abuf
, &abuflen
, si
->pkey
)) {
867 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, ERR_R_EVP_LIB
);
870 ASN1_STRING_set0(si
->enc_digest
, abuf
, abuflen
);
873 } else if (i
== NID_pkcs7_digest
) {
874 unsigned char md_data
[EVP_MAX_MD_SIZE
];
876 if (!PKCS7_find_digest(&mdc
, bio
,
877 OBJ_obj2nid(p7
->d
.digest
->md
->algorithm
)))
879 if (!EVP_DigestFinal_ex(mdc
, md_data
, &md_len
))
881 M_ASN1_OCTET_STRING_set(p7
->d
.digest
->digest
, md_data
, md_len
);
884 if (!PKCS7_is_detached(p7
)) {
886 * NOTE(emilia): I think we only reach os == NULL here because detached
887 * digested data support is broken.
891 if (!(os
->flags
& ASN1_STRING_FLAG_NDEF
)) {
894 btmp
= BIO_find_type(bio
, BIO_TYPE_MEM
);
896 PKCS7err(PKCS7_F_PKCS7_DATAFINAL
, PKCS7_R_UNABLE_TO_FIND_MEM_BIO
);
899 contlen
= BIO_get_mem_data(btmp
, &cont
);
901 * Mark the BIO read only then we can use its copy of the data
902 * instead of making an extra copy.
904 BIO_set_flags(btmp
, BIO_FLAGS_MEM_RDONLY
);
905 BIO_set_mem_eof_return(btmp
, 0);
906 ASN1_STRING_set0(os
, (unsigned char *)cont
, contlen
);
911 EVP_MD_CTX_cleanup(&ctx_tmp
);
915 int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO
*si
)
919 unsigned char *abuf
= NULL
;
922 const EVP_MD
*md
= NULL
;
924 md
= EVP_get_digestbyobj(si
->digest_alg
->algorithm
);
928 EVP_MD_CTX_init(&mctx
);
929 if (EVP_DigestSignInit(&mctx
, &pctx
, md
, NULL
, si
->pkey
) <= 0)
932 if (EVP_PKEY_CTX_ctrl(pctx
, -1, EVP_PKEY_OP_SIGN
,
933 EVP_PKEY_CTRL_PKCS7_SIGN
, 0, si
) <= 0) {
934 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN
, PKCS7_R_CTRL_ERROR
);
938 alen
= ASN1_item_i2d((ASN1_VALUE
*)si
->auth_attr
, &abuf
,
939 ASN1_ITEM_rptr(PKCS7_ATTR_SIGN
));
942 if (EVP_DigestSignUpdate(&mctx
, abuf
, alen
) <= 0)
946 if (EVP_DigestSignFinal(&mctx
, NULL
, &siglen
) <= 0)
948 abuf
= OPENSSL_malloc(siglen
);
951 if (EVP_DigestSignFinal(&mctx
, abuf
, &siglen
) <= 0)
954 if (EVP_PKEY_CTX_ctrl(pctx
, -1, EVP_PKEY_OP_SIGN
,
955 EVP_PKEY_CTRL_PKCS7_SIGN
, 1, si
) <= 0) {
956 PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN
, PKCS7_R_CTRL_ERROR
);
960 EVP_MD_CTX_cleanup(&mctx
);
962 ASN1_STRING_set0(si
->enc_digest
, abuf
, siglen
);
969 EVP_MD_CTX_cleanup(&mctx
);
974 int PKCS7_dataVerify(X509_STORE
*cert_store
, X509_STORE_CTX
*ctx
, BIO
*bio
,
975 PKCS7
*p7
, PKCS7_SIGNER_INFO
*si
)
977 PKCS7_ISSUER_AND_SERIAL
*ias
;
979 STACK_OF(X509
) *cert
;
983 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, PKCS7_R_INVALID_NULL_POINTER
);
987 if (p7
->d
.ptr
== NULL
) {
988 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, PKCS7_R_NO_CONTENT
);
992 if (PKCS7_type_is_signed(p7
)) {
993 cert
= p7
->d
.sign
->cert
;
994 } else if (PKCS7_type_is_signedAndEnveloped(p7
)) {
995 cert
= p7
->d
.signed_and_enveloped
->cert
;
997 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, PKCS7_R_WRONG_PKCS7_TYPE
);
1000 /* XXXXXXXXXXXXXXXXXXXXXXX */
1001 ias
= si
->issuer_and_serial
;
1003 x509
= X509_find_by_issuer_and_serial(cert
, ias
->issuer
, ias
->serial
);
1005 /* were we able to find the cert in passed to us */
1007 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
,
1008 PKCS7_R_UNABLE_TO_FIND_CERTIFICATE
);
1013 if (!X509_STORE_CTX_init(ctx
, cert_store
, x509
, cert
)) {
1014 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, ERR_R_X509_LIB
);
1017 X509_STORE_CTX_set_purpose(ctx
, X509_PURPOSE_SMIME_SIGN
);
1018 i
= X509_verify_cert(ctx
);
1020 PKCS7err(PKCS7_F_PKCS7_DATAVERIFY
, ERR_R_X509_LIB
);
1021 X509_STORE_CTX_cleanup(ctx
);
1024 X509_STORE_CTX_cleanup(ctx
);
1026 return PKCS7_signatureVerify(bio
, p7
, si
, x509
);
1031 int PKCS7_signatureVerify(BIO
*bio
, PKCS7
*p7
, PKCS7_SIGNER_INFO
*si
,
1034 ASN1_OCTET_STRING
*os
;
1035 EVP_MD_CTX mdc_tmp
, *mdc
;
1038 STACK_OF(X509_ATTRIBUTE
) *sk
;
1042 EVP_MD_CTX_init(&mdc_tmp
);
1044 if (!PKCS7_type_is_signed(p7
) && !PKCS7_type_is_signedAndEnveloped(p7
)) {
1045 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, PKCS7_R_WRONG_PKCS7_TYPE
);
1049 md_type
= OBJ_obj2nid(si
->digest_alg
->algorithm
);
1053 if ((btmp
== NULL
) ||
1054 ((btmp
= BIO_find_type(btmp
, BIO_TYPE_MD
)) == NULL
)) {
1055 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
,
1056 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST
);
1059 BIO_get_md_ctx(btmp
, &mdc
);
1061 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, ERR_R_INTERNAL_ERROR
);
1064 if (EVP_MD_CTX_type(mdc
) == md_type
)
1067 * Workaround for some broken clients that put the signature OID
1068 * instead of the digest OID in digest_alg->algorithm
1070 if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc
)) == md_type
)
1072 btmp
= BIO_next(btmp
);
1076 * mdc is the digest ctx that we want, unless there are attributes, in
1077 * which case the digest is the signed attributes
1079 if (!EVP_MD_CTX_copy_ex(&mdc_tmp
, mdc
))
1083 if ((sk
!= NULL
) && (sk_X509_ATTRIBUTE_num(sk
) != 0)) {
1084 unsigned char md_dat
[EVP_MAX_MD_SIZE
], *abuf
= NULL
;
1085 unsigned int md_len
;
1087 ASN1_OCTET_STRING
*message_digest
;
1089 if (!EVP_DigestFinal_ex(&mdc_tmp
, md_dat
, &md_len
))
1091 message_digest
= PKCS7_digest_from_attributes(sk
);
1092 if (!message_digest
) {
1093 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
,
1094 PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST
);
1097 if ((message_digest
->length
!= (int)md_len
) ||
1098 (memcmp(message_digest
->data
, md_dat
, md_len
))) {
1102 for (ii
= 0; ii
< message_digest
->length
; ii
++)
1103 printf("%02X", message_digest
->data
[ii
]);
1105 for (ii
= 0; ii
< md_len
; ii
++)
1106 printf("%02X", md_dat
[ii
]);
1110 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, PKCS7_R_DIGEST_FAILURE
);
1115 if (!EVP_VerifyInit_ex(&mdc_tmp
, EVP_get_digestbynid(md_type
), NULL
))
1118 alen
= ASN1_item_i2d((ASN1_VALUE
*)sk
, &abuf
,
1119 ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY
));
1121 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, ERR_R_ASN1_LIB
);
1125 if (!EVP_VerifyUpdate(&mdc_tmp
, abuf
, alen
))
1131 os
= si
->enc_digest
;
1132 pkey
= X509_get_pubkey(x509
);
1138 i
= EVP_VerifyFinal(&mdc_tmp
, os
->data
, os
->length
, pkey
);
1139 EVP_PKEY_free(pkey
);
1141 PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY
, PKCS7_R_SIGNATURE_FAILURE
);
1147 EVP_MD_CTX_cleanup(&mdc_tmp
);
1151 PKCS7_ISSUER_AND_SERIAL
*PKCS7_get_issuer_and_serial(PKCS7
*p7
, int idx
)
1153 STACK_OF(PKCS7_RECIP_INFO
) *rsk
;
1154 PKCS7_RECIP_INFO
*ri
;
1157 i
= OBJ_obj2nid(p7
->type
);
1158 if (i
!= NID_pkcs7_signedAndEnveloped
)
1160 if (p7
->d
.signed_and_enveloped
== NULL
)
1162 rsk
= p7
->d
.signed_and_enveloped
->recipientinfo
;
1165 if (sk_PKCS7_RECIP_INFO_num(rsk
) <= idx
)
1167 ri
= sk_PKCS7_RECIP_INFO_value(rsk
, idx
);
1168 return (ri
->issuer_and_serial
);
1171 ASN1_TYPE
*PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO
*si
, int nid
)
1173 return (get_attribute(si
->auth_attr
, nid
));
1176 ASN1_TYPE
*PKCS7_get_attribute(PKCS7_SIGNER_INFO
*si
, int nid
)
1178 return (get_attribute(si
->unauth_attr
, nid
));
1181 static ASN1_TYPE
*get_attribute(STACK_OF(X509_ATTRIBUTE
) *sk
, int nid
)
1187 o
= OBJ_nid2obj(nid
);
1190 for (i
= 0; i
< sk_X509_ATTRIBUTE_num(sk
); i
++) {
1191 xa
= sk_X509_ATTRIBUTE_value(sk
, i
);
1192 if (OBJ_cmp(xa
->object
, o
) == 0) {
1193 if (!xa
->single
&& sk_ASN1_TYPE_num(xa
->value
.set
))
1194 return (sk_ASN1_TYPE_value(xa
->value
.set
, 0));
1202 ASN1_OCTET_STRING
*PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE
) *sk
)
1205 if (!(astype
= get_attribute(sk
, NID_pkcs9_messageDigest
)))
1207 return astype
->value
.octet_string
;
1210 int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO
*p7si
,
1211 STACK_OF(X509_ATTRIBUTE
) *sk
)
1215 if (p7si
->auth_attr
!= NULL
)
1216 sk_X509_ATTRIBUTE_pop_free(p7si
->auth_attr
, X509_ATTRIBUTE_free
);
1217 p7si
->auth_attr
= sk_X509_ATTRIBUTE_dup(sk
);
1218 if (p7si
->auth_attr
== NULL
)
1220 for (i
= 0; i
< sk_X509_ATTRIBUTE_num(sk
); i
++) {
1221 if ((sk_X509_ATTRIBUTE_set(p7si
->auth_attr
, i
,
1222 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1230 int PKCS7_set_attributes(PKCS7_SIGNER_INFO
*p7si
,
1231 STACK_OF(X509_ATTRIBUTE
) *sk
)
1235 if (p7si
->unauth_attr
!= NULL
)
1236 sk_X509_ATTRIBUTE_pop_free(p7si
->unauth_attr
, X509_ATTRIBUTE_free
);
1237 p7si
->unauth_attr
= sk_X509_ATTRIBUTE_dup(sk
);
1238 if (p7si
->unauth_attr
== NULL
)
1240 for (i
= 0; i
< sk_X509_ATTRIBUTE_num(sk
); i
++) {
1241 if ((sk_X509_ATTRIBUTE_set(p7si
->unauth_attr
, i
,
1242 X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value
1250 int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO
*p7si
, int nid
, int atrtype
,
1253 return (add_attribute(&(p7si
->auth_attr
), nid
, atrtype
, value
));
1256 int PKCS7_add_attribute(PKCS7_SIGNER_INFO
*p7si
, int nid
, int atrtype
,
1259 return (add_attribute(&(p7si
->unauth_attr
), nid
, atrtype
, value
));
1262 static int add_attribute(STACK_OF(X509_ATTRIBUTE
) **sk
, int nid
, int atrtype
,
1265 X509_ATTRIBUTE
*attr
= NULL
;
1268 *sk
= sk_X509_ATTRIBUTE_new_null();
1272 if (!(attr
= X509_ATTRIBUTE_create(nid
, atrtype
, value
)))
1274 if (!sk_X509_ATTRIBUTE_push(*sk
, attr
)) {
1275 X509_ATTRIBUTE_free(attr
);
1281 for (i
= 0; i
< sk_X509_ATTRIBUTE_num(*sk
); i
++) {
1282 attr
= sk_X509_ATTRIBUTE_value(*sk
, i
);
1283 if (OBJ_obj2nid(attr
->object
) == nid
) {
1284 X509_ATTRIBUTE_free(attr
);
1285 attr
= X509_ATTRIBUTE_create(nid
, atrtype
, value
);
1288 if (!sk_X509_ATTRIBUTE_set(*sk
, i
, attr
)) {
1289 X509_ATTRIBUTE_free(attr
);