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1295 lines
38 KiB
1295 lines
38 KiB
/* crypto/pkcs7/pk7_doit.c */ |
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
|
* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
|
* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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|
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#include <stdio.h> |
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#include "cryptlib.h" |
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#include <openssl/rand.h> |
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#include <openssl/objects.h> |
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#include <openssl/x509.h> |
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#include <openssl/x509v3.h> |
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#include <openssl/err.h> |
|
|
|
static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
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void *value); |
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static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid); |
|
|
|
static int PKCS7_type_is_other(PKCS7 *p7) |
|
{ |
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int isOther = 1; |
|
|
|
int nid = OBJ_obj2nid(p7->type); |
|
|
|
switch (nid) { |
|
case NID_pkcs7_data: |
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case NID_pkcs7_signed: |
|
case NID_pkcs7_enveloped: |
|
case NID_pkcs7_signedAndEnveloped: |
|
case NID_pkcs7_digest: |
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case NID_pkcs7_encrypted: |
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isOther = 0; |
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break; |
|
default: |
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isOther = 1; |
|
} |
|
|
|
return isOther; |
|
|
|
} |
|
|
|
static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7) |
|
{ |
|
if (PKCS7_type_is_data(p7)) |
|
return p7->d.data; |
|
if (PKCS7_type_is_other(p7) && p7->d.other |
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&& (p7->d.other->type == V_ASN1_OCTET_STRING)) |
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return p7->d.other->value.octet_string; |
|
return NULL; |
|
} |
|
|
|
static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg) |
|
{ |
|
BIO *btmp; |
|
const EVP_MD *md; |
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if ((btmp = BIO_new(BIO_f_md())) == NULL) { |
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PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB); |
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goto err; |
|
} |
|
|
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md = EVP_get_digestbyobj(alg->algorithm); |
|
if (md == NULL) { |
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PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, PKCS7_R_UNKNOWN_DIGEST_TYPE); |
|
goto err; |
|
} |
|
|
|
BIO_set_md(btmp, md); |
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if (*pbio == NULL) |
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*pbio = btmp; |
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else if (!BIO_push(*pbio, btmp)) { |
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PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST, ERR_R_BIO_LIB); |
|
goto err; |
|
} |
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btmp = NULL; |
|
|
|
return 1; |
|
|
|
err: |
|
if (btmp) |
|
BIO_free(btmp); |
|
return 0; |
|
|
|
} |
|
|
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static int pkcs7_encode_rinfo(PKCS7_RECIP_INFO *ri, |
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unsigned char *key, int keylen) |
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{ |
|
EVP_PKEY_CTX *pctx = NULL; |
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EVP_PKEY *pkey = NULL; |
|
unsigned char *ek = NULL; |
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int ret = 0; |
|
size_t eklen; |
|
|
|
pkey = X509_get_pubkey(ri->cert); |
|
|
|
if (!pkey) |
|
return 0; |
|
|
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pctx = EVP_PKEY_CTX_new(pkey, NULL); |
|
if (!pctx) |
|
return 0; |
|
|
|
if (EVP_PKEY_encrypt_init(pctx) <= 0) |
|
goto err; |
|
|
|
if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT, |
|
EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0) { |
|
PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR); |
|
goto err; |
|
} |
|
|
|
if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0) |
|
goto err; |
|
|
|
ek = OPENSSL_malloc(eklen); |
|
|
|
if (ek == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE); |
|
goto err; |
|
} |
|
|
|
if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0) |
|
goto err; |
|
|
|
ASN1_STRING_set0(ri->enc_key, ek, eklen); |
|
ek = NULL; |
|
|
|
ret = 1; |
|
|
|
err: |
|
if (pkey) |
|
EVP_PKEY_free(pkey); |
|
if (pctx) |
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EVP_PKEY_CTX_free(pctx); |
|
if (ek) |
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OPENSSL_free(ek); |
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return ret; |
|
|
|
} |
|
|
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static int pkcs7_decrypt_rinfo(unsigned char **pek, int *peklen, |
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PKCS7_RECIP_INFO *ri, EVP_PKEY *pkey) |
|
{ |
|
EVP_PKEY_CTX *pctx = NULL; |
|
unsigned char *ek = NULL; |
|
size_t eklen; |
|
|
|
int ret = -1; |
|
|
|
pctx = EVP_PKEY_CTX_new(pkey, NULL); |
|
if (!pctx) |
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return -1; |
|
|
|
if (EVP_PKEY_decrypt_init(pctx) <= 0) |
|
goto err; |
|
|
|
if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_DECRYPT, |
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EVP_PKEY_CTRL_PKCS7_DECRYPT, 0, ri) <= 0) { |
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PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR); |
|
goto err; |
|
} |
|
|
|
if (EVP_PKEY_decrypt(pctx, NULL, &eklen, |
|
ri->enc_key->data, ri->enc_key->length) <= 0) |
|
goto err; |
|
|
|
ek = OPENSSL_malloc(eklen); |
|
|
|
if (ek == NULL) { |
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PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE); |
|
goto err; |
|
} |
|
|
|
if (EVP_PKEY_decrypt(pctx, ek, &eklen, |
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ri->enc_key->data, ri->enc_key->length) <= 0) { |
|
ret = 0; |
|
PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB); |
|
goto err; |
|
} |
|
|
|
ret = 1; |
|
|
|
if (*pek) { |
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OPENSSL_cleanse(*pek, *peklen); |
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OPENSSL_free(*pek); |
|
} |
|
|
|
*pek = ek; |
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*peklen = eklen; |
|
|
|
err: |
|
if (pctx) |
|
EVP_PKEY_CTX_free(pctx); |
|
if (!ret && ek) |
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OPENSSL_free(ek); |
|
|
|
return ret; |
|
} |
|
|
|
BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio) |
|
{ |
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int i; |
|
BIO *out = NULL, *btmp = NULL; |
|
X509_ALGOR *xa = NULL; |
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const EVP_CIPHER *evp_cipher = NULL; |
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STACK_OF(X509_ALGOR) *md_sk = NULL; |
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STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; |
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X509_ALGOR *xalg = NULL; |
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PKCS7_RECIP_INFO *ri = NULL; |
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ASN1_OCTET_STRING *os = NULL; |
|
|
|
if (p7 == NULL) { |
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PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER); |
|
return NULL; |
|
} |
|
/* |
|
* The content field in the PKCS7 ContentInfo is optional, but that really |
|
* only applies to inner content (precisely, detached signatures). |
|
* |
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* When reading content, missing outer content is therefore treated as an |
|
* error. |
|
* |
|
* When creating content, PKCS7_content_new() must be called before |
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* calling this method, so a NULL p7->d is always an error. |
|
*/ |
|
if (p7->d.ptr == NULL) { |
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PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT); |
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return NULL; |
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} |
|
|
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i = OBJ_obj2nid(p7->type); |
|
p7->state = PKCS7_S_HEADER; |
|
|
|
switch (i) { |
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case NID_pkcs7_signed: |
|
md_sk = p7->d.sign->md_algs; |
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os = PKCS7_get_octet_string(p7->d.sign->contents); |
|
break; |
|
case NID_pkcs7_signedAndEnveloped: |
|
rsk = p7->d.signed_and_enveloped->recipientinfo; |
|
md_sk = p7->d.signed_and_enveloped->md_algs; |
|
xalg = p7->d.signed_and_enveloped->enc_data->algorithm; |
|
evp_cipher = p7->d.signed_and_enveloped->enc_data->cipher; |
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if (evp_cipher == NULL) { |
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PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); |
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goto err; |
|
} |
|
break; |
|
case NID_pkcs7_enveloped: |
|
rsk = p7->d.enveloped->recipientinfo; |
|
xalg = p7->d.enveloped->enc_data->algorithm; |
|
evp_cipher = p7->d.enveloped->enc_data->cipher; |
|
if (evp_cipher == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_CIPHER_NOT_INITIALIZED); |
|
goto err; |
|
} |
|
break; |
|
case NID_pkcs7_digest: |
|
xa = p7->d.digest->md; |
|
os = PKCS7_get_octet_string(p7->d.digest->contents); |
|
break; |
|
case NID_pkcs7_data: |
|
break; |
|
default: |
|
PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); |
|
goto err; |
|
} |
|
|
|
for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) |
|
if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i))) |
|
goto err; |
|
|
|
if (xa && !PKCS7_bio_add_digest(&out, xa)) |
|
goto err; |
|
|
|
if (evp_cipher != NULL) { |
|
unsigned char key[EVP_MAX_KEY_LENGTH]; |
|
unsigned char iv[EVP_MAX_IV_LENGTH]; |
|
int keylen, ivlen; |
|
EVP_CIPHER_CTX *ctx; |
|
|
|
if ((btmp = BIO_new(BIO_f_cipher())) == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAINIT, ERR_R_BIO_LIB); |
|
goto err; |
|
} |
|
BIO_get_cipher_ctx(btmp, &ctx); |
|
keylen = EVP_CIPHER_key_length(evp_cipher); |
|
ivlen = EVP_CIPHER_iv_length(evp_cipher); |
|
xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher)); |
|
if (ivlen > 0) |
|
if (RAND_bytes(iv, ivlen) <= 0) |
|
goto err; |
|
if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1) <= 0) |
|
goto err; |
|
if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0) |
|
goto err; |
|
if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0) |
|
goto err; |
|
|
|
if (ivlen > 0) { |
|
if (xalg->parameter == NULL) { |
|
xalg->parameter = ASN1_TYPE_new(); |
|
if (xalg->parameter == NULL) |
|
goto err; |
|
} |
|
if (EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0) |
|
goto err; |
|
} |
|
|
|
/* Lets do the pub key stuff :-) */ |
|
for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { |
|
ri = sk_PKCS7_RECIP_INFO_value(rsk, i); |
|
if (pkcs7_encode_rinfo(ri, key, keylen) <= 0) |
|
goto err; |
|
} |
|
OPENSSL_cleanse(key, keylen); |
|
|
|
if (out == NULL) |
|
out = btmp; |
|
else |
|
BIO_push(out, btmp); |
|
btmp = NULL; |
|
} |
|
|
|
if (bio == NULL) { |
|
if (PKCS7_is_detached(p7)) |
|
bio = BIO_new(BIO_s_null()); |
|
else if (os && os->length > 0) |
|
bio = BIO_new_mem_buf(os->data, os->length); |
|
if (bio == NULL) { |
|
bio = BIO_new(BIO_s_mem()); |
|
if (bio == NULL) |
|
goto err; |
|
BIO_set_mem_eof_return(bio, 0); |
|
} |
|
} |
|
if (out) |
|
BIO_push(out, bio); |
|
else |
|
out = bio; |
|
bio = NULL; |
|
if (0) { |
|
err: |
|
if (out != NULL) |
|
BIO_free_all(out); |
|
if (btmp != NULL) |
|
BIO_free_all(btmp); |
|
out = NULL; |
|
} |
|
return (out); |
|
} |
|
|
|
static int pkcs7_cmp_ri(PKCS7_RECIP_INFO *ri, X509 *pcert) |
|
{ |
|
int ret; |
|
ret = X509_NAME_cmp(ri->issuer_and_serial->issuer, |
|
pcert->cert_info->issuer); |
|
if (ret) |
|
return ret; |
|
return M_ASN1_INTEGER_cmp(pcert->cert_info->serialNumber, |
|
ri->issuer_and_serial->serial); |
|
} |
|
|
|
/* int */ |
|
BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert) |
|
{ |
|
int i, j; |
|
BIO *out = NULL, *btmp = NULL, *etmp = NULL, *bio = NULL; |
|
X509_ALGOR *xa; |
|
ASN1_OCTET_STRING *data_body = NULL; |
|
const EVP_MD *evp_md; |
|
const EVP_CIPHER *evp_cipher = NULL; |
|
EVP_CIPHER_CTX *evp_ctx = NULL; |
|
X509_ALGOR *enc_alg = NULL; |
|
STACK_OF(X509_ALGOR) *md_sk = NULL; |
|
STACK_OF(PKCS7_RECIP_INFO) *rsk = NULL; |
|
PKCS7_RECIP_INFO *ri = NULL; |
|
unsigned char *ek = NULL, *tkey = NULL; |
|
int eklen = 0, tkeylen = 0; |
|
|
|
if (p7 == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_INVALID_NULL_POINTER); |
|
return NULL; |
|
} |
|
|
|
if (p7->d.ptr == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); |
|
return NULL; |
|
} |
|
|
|
i = OBJ_obj2nid(p7->type); |
|
p7->state = PKCS7_S_HEADER; |
|
|
|
switch (i) { |
|
case NID_pkcs7_signed: |
|
/* |
|
* p7->d.sign->contents is a PKCS7 structure consisting of a contentType |
|
* field and optional content. |
|
* data_body is NULL if that structure has no (=detached) content |
|
* or if the contentType is wrong (i.e., not "data"). |
|
*/ |
|
data_body = PKCS7_get_octet_string(p7->d.sign->contents); |
|
if (!PKCS7_is_detached(p7) && data_body == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
|
PKCS7_R_INVALID_SIGNED_DATA_TYPE); |
|
goto err; |
|
} |
|
md_sk = p7->d.sign->md_algs; |
|
break; |
|
case NID_pkcs7_signedAndEnveloped: |
|
rsk = p7->d.signed_and_enveloped->recipientinfo; |
|
md_sk = p7->d.signed_and_enveloped->md_algs; |
|
/* data_body is NULL if the optional EncryptedContent is missing. */ |
|
data_body = p7->d.signed_and_enveloped->enc_data->enc_data; |
|
enc_alg = p7->d.signed_and_enveloped->enc_data->algorithm; |
|
evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); |
|
if (evp_cipher == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
|
PKCS7_R_UNSUPPORTED_CIPHER_TYPE); |
|
goto err; |
|
} |
|
break; |
|
case NID_pkcs7_enveloped: |
|
rsk = p7->d.enveloped->recipientinfo; |
|
enc_alg = p7->d.enveloped->enc_data->algorithm; |
|
/* data_body is NULL if the optional EncryptedContent is missing. */ |
|
data_body = p7->d.enveloped->enc_data->enc_data; |
|
evp_cipher = EVP_get_cipherbyobj(enc_alg->algorithm); |
|
if (evp_cipher == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
|
PKCS7_R_UNSUPPORTED_CIPHER_TYPE); |
|
goto err; |
|
} |
|
break; |
|
default: |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); |
|
goto err; |
|
} |
|
|
|
/* Detached content must be supplied via in_bio instead. */ |
|
if (data_body == NULL && in_bio == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT); |
|
goto err; |
|
} |
|
|
|
/* We will be checking the signature */ |
|
if (md_sk != NULL) { |
|
for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { |
|
xa = sk_X509_ALGOR_value(md_sk, i); |
|
if ((btmp = BIO_new(BIO_f_md())) == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); |
|
goto err; |
|
} |
|
|
|
j = OBJ_obj2nid(xa->algorithm); |
|
evp_md = EVP_get_digestbynid(j); |
|
if (evp_md == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
|
PKCS7_R_UNKNOWN_DIGEST_TYPE); |
|
goto err; |
|
} |
|
|
|
BIO_set_md(btmp, evp_md); |
|
if (out == NULL) |
|
out = btmp; |
|
else |
|
BIO_push(out, btmp); |
|
btmp = NULL; |
|
} |
|
} |
|
|
|
if (evp_cipher != NULL) { |
|
#if 0 |
|
unsigned char key[EVP_MAX_KEY_LENGTH]; |
|
unsigned char iv[EVP_MAX_IV_LENGTH]; |
|
unsigned char *p; |
|
int keylen, ivlen; |
|
int max; |
|
X509_OBJECT ret; |
|
#endif |
|
|
|
if ((etmp = BIO_new(BIO_f_cipher())) == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, ERR_R_BIO_LIB); |
|
goto err; |
|
} |
|
|
|
/* |
|
* It was encrypted, we need to decrypt the secret key with the |
|
* private key |
|
*/ |
|
|
|
/* |
|
* Find the recipientInfo which matches the passed certificate (if |
|
* any) |
|
*/ |
|
|
|
if (pcert) { |
|
for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { |
|
ri = sk_PKCS7_RECIP_INFO_value(rsk, i); |
|
if (!pkcs7_cmp_ri(ri, pcert)) |
|
break; |
|
ri = NULL; |
|
} |
|
if (ri == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATADECODE, |
|
PKCS7_R_NO_RECIPIENT_MATCHES_CERTIFICATE); |
|
goto err; |
|
} |
|
} |
|
|
|
/* If we haven't got a certificate try each ri in turn */ |
|
if (pcert == NULL) { |
|
/* |
|
* Always attempt to decrypt all rinfo even after sucess as a |
|
* defence against MMA timing attacks. |
|
*/ |
|
for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rsk); i++) { |
|
ri = sk_PKCS7_RECIP_INFO_value(rsk, i); |
|
|
|
if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) |
|
goto err; |
|
ERR_clear_error(); |
|
} |
|
} else { |
|
/* Only exit on fatal errors, not decrypt failure */ |
|
if (pkcs7_decrypt_rinfo(&ek, &eklen, ri, pkey) < 0) |
|
goto err; |
|
ERR_clear_error(); |
|
} |
|
|
|
evp_ctx = NULL; |
|
BIO_get_cipher_ctx(etmp, &evp_ctx); |
|
if (EVP_CipherInit_ex(evp_ctx, evp_cipher, NULL, NULL, NULL, 0) <= 0) |
|
goto err; |
|
if (EVP_CIPHER_asn1_to_param(evp_ctx, enc_alg->parameter) < 0) |
|
goto err; |
|
/* Generate random key as MMA defence */ |
|
tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx); |
|
tkey = OPENSSL_malloc(tkeylen); |
|
if (!tkey) |
|
goto err; |
|
if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0) |
|
goto err; |
|
if (ek == NULL) { |
|
ek = tkey; |
|
eklen = tkeylen; |
|
tkey = NULL; |
|
} |
|
|
|
if (eklen != EVP_CIPHER_CTX_key_length(evp_ctx)) { |
|
/* |
|
* Some S/MIME clients don't use the same key and effective key |
|
* length. The key length is determined by the size of the |
|
* decrypted RSA key. |
|
*/ |
|
if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, eklen)) { |
|
/* Use random key as MMA defence */ |
|
OPENSSL_cleanse(ek, eklen); |
|
OPENSSL_free(ek); |
|
ek = tkey; |
|
eklen = tkeylen; |
|
tkey = NULL; |
|
} |
|
} |
|
/* Clear errors so we don't leak information useful in MMA */ |
|
ERR_clear_error(); |
|
if (EVP_CipherInit_ex(evp_ctx, NULL, NULL, ek, NULL, 0) <= 0) |
|
goto err; |
|
|
|
if (ek) { |
|
OPENSSL_cleanse(ek, eklen); |
|
OPENSSL_free(ek); |
|
ek = NULL; |
|
} |
|
if (tkey) { |
|
OPENSSL_cleanse(tkey, tkeylen); |
|
OPENSSL_free(tkey); |
|
tkey = NULL; |
|
} |
|
|
|
if (out == NULL) |
|
out = etmp; |
|
else |
|
BIO_push(out, etmp); |
|
etmp = NULL; |
|
} |
|
#if 1 |
|
if (in_bio != NULL) { |
|
bio = in_bio; |
|
} else { |
|
# if 0 |
|
bio = BIO_new(BIO_s_mem()); |
|
/* |
|
* We need to set this so that when we have read all the data, the |
|
* encrypt BIO, if present, will read EOF and encode the last few |
|
* bytes |
|
*/ |
|
BIO_set_mem_eof_return(bio, 0); |
|
|
|
if (data_body->length > 0) |
|
BIO_write(bio, (char *)data_body->data, data_body->length); |
|
# else |
|
if (data_body->length > 0) |
|
bio = BIO_new_mem_buf(data_body->data, data_body->length); |
|
else { |
|
bio = BIO_new(BIO_s_mem()); |
|
if (bio == NULL) |
|
goto err; |
|
BIO_set_mem_eof_return(bio, 0); |
|
} |
|
if (bio == NULL) |
|
goto err; |
|
# endif |
|
} |
|
BIO_push(out, bio); |
|
bio = NULL; |
|
#endif |
|
if (0) { |
|
err: |
|
if (ek) { |
|
OPENSSL_cleanse(ek, eklen); |
|
OPENSSL_free(ek); |
|
} |
|
if (tkey) { |
|
OPENSSL_cleanse(tkey, tkeylen); |
|
OPENSSL_free(tkey); |
|
} |
|
if (out != NULL) |
|
BIO_free_all(out); |
|
if (btmp != NULL) |
|
BIO_free_all(btmp); |
|
if (etmp != NULL) |
|
BIO_free_all(etmp); |
|
if (bio != NULL) |
|
BIO_free_all(bio); |
|
out = NULL; |
|
} |
|
return (out); |
|
} |
|
|
|
static BIO *PKCS7_find_digest(EVP_MD_CTX **pmd, BIO *bio, int nid) |
|
{ |
|
for (;;) { |
|
bio = BIO_find_type(bio, BIO_TYPE_MD); |
|
if (bio == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, |
|
PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
|
return NULL; |
|
} |
|
BIO_get_md_ctx(bio, pmd); |
|
if (*pmd == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_FIND_DIGEST, ERR_R_INTERNAL_ERROR); |
|
return NULL; |
|
} |
|
if (EVP_MD_CTX_type(*pmd) == nid) |
|
return bio; |
|
bio = BIO_next(bio); |
|
} |
|
return NULL; |
|
} |
|
|
|
static int do_pkcs7_signed_attrib(PKCS7_SIGNER_INFO *si, EVP_MD_CTX *mctx) |
|
{ |
|
unsigned char md_data[EVP_MAX_MD_SIZE]; |
|
unsigned int md_len; |
|
|
|
/* Add signing time if not already present */ |
|
if (!PKCS7_get_signed_attribute(si, NID_pkcs9_signingTime)) { |
|
if (!PKCS7_add0_attrib_signing_time(si, NULL)) { |
|
PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); |
|
return 0; |
|
} |
|
} |
|
|
|
/* Add digest */ |
|
if (!EVP_DigestFinal_ex(mctx, md_data, &md_len)) { |
|
PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_EVP_LIB); |
|
return 0; |
|
} |
|
if (!PKCS7_add1_attrib_digest(si, md_data, md_len)) { |
|
PKCS7err(PKCS7_F_DO_PKCS7_SIGNED_ATTRIB, ERR_R_MALLOC_FAILURE); |
|
return 0; |
|
} |
|
|
|
/* Now sign the attributes */ |
|
if (!PKCS7_SIGNER_INFO_sign(si)) |
|
return 0; |
|
|
|
return 1; |
|
} |
|
|
|
int PKCS7_dataFinal(PKCS7 *p7, BIO *bio) |
|
{ |
|
int ret = 0; |
|
int i, j; |
|
BIO *btmp; |
|
PKCS7_SIGNER_INFO *si; |
|
EVP_MD_CTX *mdc, ctx_tmp; |
|
STACK_OF(X509_ATTRIBUTE) *sk; |
|
STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL; |
|
ASN1_OCTET_STRING *os = NULL; |
|
|
|
if (p7 == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_INVALID_NULL_POINTER); |
|
return 0; |
|
} |
|
|
|
if (p7->d.ptr == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT); |
|
return 0; |
|
} |
|
|
|
EVP_MD_CTX_init(&ctx_tmp); |
|
i = OBJ_obj2nid(p7->type); |
|
p7->state = PKCS7_S_HEADER; |
|
|
|
switch (i) { |
|
case NID_pkcs7_data: |
|
os = p7->d.data; |
|
break; |
|
case NID_pkcs7_signedAndEnveloped: |
|
/* XXXXXXXXXXXXXXXX */ |
|
si_sk = p7->d.signed_and_enveloped->signer_info; |
|
os = p7->d.signed_and_enveloped->enc_data->enc_data; |
|
if (!os) { |
|
os = M_ASN1_OCTET_STRING_new(); |
|
if (!os) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); |
|
goto err; |
|
} |
|
p7->d.signed_and_enveloped->enc_data->enc_data = os; |
|
} |
|
break; |
|
case NID_pkcs7_enveloped: |
|
/* XXXXXXXXXXXXXXXX */ |
|
os = p7->d.enveloped->enc_data->enc_data; |
|
if (!os) { |
|
os = M_ASN1_OCTET_STRING_new(); |
|
if (!os) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_MALLOC_FAILURE); |
|
goto err; |
|
} |
|
p7->d.enveloped->enc_data->enc_data = os; |
|
} |
|
break; |
|
case NID_pkcs7_signed: |
|
si_sk = p7->d.sign->signer_info; |
|
os = PKCS7_get_octet_string(p7->d.sign->contents); |
|
/* If detached data then the content is excluded */ |
|
if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) { |
|
M_ASN1_OCTET_STRING_free(os); |
|
os = NULL; |
|
p7->d.sign->contents->d.data = NULL; |
|
} |
|
break; |
|
|
|
case NID_pkcs7_digest: |
|
os = PKCS7_get_octet_string(p7->d.digest->contents); |
|
/* If detached data then the content is excluded */ |
|
if (PKCS7_type_is_data(p7->d.digest->contents) && p7->detached) { |
|
M_ASN1_OCTET_STRING_free(os); |
|
os = NULL; |
|
p7->d.digest->contents->d.data = NULL; |
|
} |
|
break; |
|
|
|
default: |
|
PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNSUPPORTED_CONTENT_TYPE); |
|
goto err; |
|
} |
|
|
|
if (si_sk != NULL) { |
|
for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(si_sk); i++) { |
|
si = sk_PKCS7_SIGNER_INFO_value(si_sk, i); |
|
if (si->pkey == NULL) |
|
continue; |
|
|
|
j = OBJ_obj2nid(si->digest_alg->algorithm); |
|
|
|
btmp = bio; |
|
|
|
btmp = PKCS7_find_digest(&mdc, btmp, j); |
|
|
|
if (btmp == NULL) |
|
goto err; |
|
|
|
/* |
|
* We now have the EVP_MD_CTX, lets do the signing. |
|
*/ |
|
if (!EVP_MD_CTX_copy_ex(&ctx_tmp, mdc)) |
|
goto err; |
|
|
|
sk = si->auth_attr; |
|
|
|
/* |
|
* If there are attributes, we add the digest attribute and only |
|
* sign the attributes |
|
*/ |
|
if (sk_X509_ATTRIBUTE_num(sk) > 0) { |
|
if (!do_pkcs7_signed_attrib(si, &ctx_tmp)) |
|
goto err; |
|
} else { |
|
unsigned char *abuf = NULL; |
|
unsigned int abuflen; |
|
abuflen = EVP_PKEY_size(si->pkey); |
|
abuf = OPENSSL_malloc(abuflen); |
|
if (!abuf) |
|
goto err; |
|
|
|
if (!EVP_SignFinal(&ctx_tmp, abuf, &abuflen, si->pkey)) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAFINAL, ERR_R_EVP_LIB); |
|
goto err; |
|
} |
|
ASN1_STRING_set0(si->enc_digest, abuf, abuflen); |
|
} |
|
} |
|
} else if (i == NID_pkcs7_digest) { |
|
unsigned char md_data[EVP_MAX_MD_SIZE]; |
|
unsigned int md_len; |
|
if (!PKCS7_find_digest(&mdc, bio, |
|
OBJ_obj2nid(p7->d.digest->md->algorithm))) |
|
goto err; |
|
if (!EVP_DigestFinal_ex(mdc, md_data, &md_len)) |
|
goto err; |
|
M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len); |
|
} |
|
|
|
if (!PKCS7_is_detached(p7)) { |
|
/* |
|
* NOTE(emilia): I think we only reach os == NULL here because detached |
|
* digested data support is broken. |
|
*/ |
|
if (os == NULL) |
|
goto err; |
|
if (!(os->flags & ASN1_STRING_FLAG_NDEF)) { |
|
char *cont; |
|
long contlen; |
|
btmp = BIO_find_type(bio, BIO_TYPE_MEM); |
|
if (btmp == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_UNABLE_TO_FIND_MEM_BIO); |
|
goto err; |
|
} |
|
contlen = BIO_get_mem_data(btmp, &cont); |
|
/* |
|
* Mark the BIO read only then we can use its copy of the data |
|
* instead of making an extra copy. |
|
*/ |
|
BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY); |
|
BIO_set_mem_eof_return(btmp, 0); |
|
ASN1_STRING_set0(os, (unsigned char *)cont, contlen); |
|
} |
|
} |
|
ret = 1; |
|
err: |
|
EVP_MD_CTX_cleanup(&ctx_tmp); |
|
return (ret); |
|
} |
|
|
|
int PKCS7_SIGNER_INFO_sign(PKCS7_SIGNER_INFO *si) |
|
{ |
|
EVP_MD_CTX mctx; |
|
EVP_PKEY_CTX *pctx; |
|
unsigned char *abuf = NULL; |
|
int alen; |
|
size_t siglen; |
|
const EVP_MD *md = NULL; |
|
|
|
md = EVP_get_digestbyobj(si->digest_alg->algorithm); |
|
if (md == NULL) |
|
return 0; |
|
|
|
EVP_MD_CTX_init(&mctx); |
|
if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0) |
|
goto err; |
|
|
|
if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, |
|
EVP_PKEY_CTRL_PKCS7_SIGN, 0, si) <= 0) { |
|
PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); |
|
goto err; |
|
} |
|
|
|
alen = ASN1_item_i2d((ASN1_VALUE *)si->auth_attr, &abuf, |
|
ASN1_ITEM_rptr(PKCS7_ATTR_SIGN)); |
|
if (!abuf) |
|
goto err; |
|
if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0) |
|
goto err; |
|
OPENSSL_free(abuf); |
|
abuf = NULL; |
|
if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0) |
|
goto err; |
|
abuf = OPENSSL_malloc(siglen); |
|
if (!abuf) |
|
goto err; |
|
if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0) |
|
goto err; |
|
|
|
if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, |
|
EVP_PKEY_CTRL_PKCS7_SIGN, 1, si) <= 0) { |
|
PKCS7err(PKCS7_F_PKCS7_SIGNER_INFO_SIGN, PKCS7_R_CTRL_ERROR); |
|
goto err; |
|
} |
|
|
|
EVP_MD_CTX_cleanup(&mctx); |
|
|
|
ASN1_STRING_set0(si->enc_digest, abuf, siglen); |
|
|
|
return 1; |
|
|
|
err: |
|
if (abuf) |
|
OPENSSL_free(abuf); |
|
EVP_MD_CTX_cleanup(&mctx); |
|
return 0; |
|
|
|
} |
|
|
|
int PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio, |
|
PKCS7 *p7, PKCS7_SIGNER_INFO *si) |
|
{ |
|
PKCS7_ISSUER_AND_SERIAL *ias; |
|
int ret = 0, i; |
|
STACK_OF(X509) *cert; |
|
X509 *x509; |
|
|
|
if (p7 == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_INVALID_NULL_POINTER); |
|
return 0; |
|
} |
|
|
|
if (p7->d.ptr == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT); |
|
return 0; |
|
} |
|
|
|
if (PKCS7_type_is_signed(p7)) { |
|
cert = p7->d.sign->cert; |
|
} else if (PKCS7_type_is_signedAndEnveloped(p7)) { |
|
cert = p7->d.signed_and_enveloped->cert; |
|
} else { |
|
PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); |
|
goto err; |
|
} |
|
/* XXXXXXXXXXXXXXXXXXXXXXX */ |
|
ias = si->issuer_and_serial; |
|
|
|
x509 = X509_find_by_issuer_and_serial(cert, ias->issuer, ias->serial); |
|
|
|
/* were we able to find the cert in passed to us */ |
|
if (x509 == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, |
|
PKCS7_R_UNABLE_TO_FIND_CERTIFICATE); |
|
goto err; |
|
} |
|
|
|
/* Lets verify */ |
|
if (!X509_STORE_CTX_init(ctx, cert_store, x509, cert)) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); |
|
goto err; |
|
} |
|
X509_STORE_CTX_set_purpose(ctx, X509_PURPOSE_SMIME_SIGN); |
|
i = X509_verify_cert(ctx); |
|
if (i <= 0) { |
|
PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, ERR_R_X509_LIB); |
|
X509_STORE_CTX_cleanup(ctx); |
|
goto err; |
|
} |
|
X509_STORE_CTX_cleanup(ctx); |
|
|
|
return PKCS7_signatureVerify(bio, p7, si, x509); |
|
err: |
|
return ret; |
|
} |
|
|
|
int PKCS7_signatureVerify(BIO *bio, PKCS7 *p7, PKCS7_SIGNER_INFO *si, |
|
X509 *x509) |
|
{ |
|
ASN1_OCTET_STRING *os; |
|
EVP_MD_CTX mdc_tmp, *mdc; |
|
int ret = 0, i; |
|
int md_type; |
|
STACK_OF(X509_ATTRIBUTE) *sk; |
|
BIO *btmp; |
|
EVP_PKEY *pkey; |
|
|
|
EVP_MD_CTX_init(&mdc_tmp); |
|
|
|
if (!PKCS7_type_is_signed(p7) && !PKCS7_type_is_signedAndEnveloped(p7)) { |
|
PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_WRONG_PKCS7_TYPE); |
|
goto err; |
|
} |
|
|
|
md_type = OBJ_obj2nid(si->digest_alg->algorithm); |
|
|
|
btmp = bio; |
|
for (;;) { |
|
if ((btmp == NULL) || |
|
((btmp = BIO_find_type(btmp, BIO_TYPE_MD)) == NULL)) { |
|
PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, |
|
PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
|
goto err; |
|
} |
|
BIO_get_md_ctx(btmp, &mdc); |
|
if (mdc == NULL) { |
|
PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_INTERNAL_ERROR); |
|
goto err; |
|
} |
|
if (EVP_MD_CTX_type(mdc) == md_type) |
|
break; |
|
/* |
|
* Workaround for some broken clients that put the signature OID |
|
* instead of the digest OID in digest_alg->algorithm |
|
*/ |
|
if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type) |
|
break; |
|
btmp = BIO_next(btmp); |
|
} |
|
|
|
/* |
|
* mdc is the digest ctx that we want, unless there are attributes, in |
|
* which case the digest is the signed attributes |
|
*/ |
|
if (!EVP_MD_CTX_copy_ex(&mdc_tmp, mdc)) |
|
goto err; |
|
|
|
sk = si->auth_attr; |
|
if ((sk != NULL) && (sk_X509_ATTRIBUTE_num(sk) != 0)) { |
|
unsigned char md_dat[EVP_MAX_MD_SIZE], *abuf = NULL; |
|
unsigned int md_len; |
|
int alen; |
|
ASN1_OCTET_STRING *message_digest; |
|
|
|
if (!EVP_DigestFinal_ex(&mdc_tmp, md_dat, &md_len)) |
|
goto err; |
|
message_digest = PKCS7_digest_from_attributes(sk); |
|
if (!message_digest) { |
|
PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, |
|
PKCS7_R_UNABLE_TO_FIND_MESSAGE_DIGEST); |
|
goto err; |
|
} |
|
if ((message_digest->length != (int)md_len) || |
|
(memcmp(message_digest->data, md_dat, md_len))) { |
|
#if 0 |
|
{ |
|
int ii; |
|
for (ii = 0; ii < message_digest->length; ii++) |
|
printf("%02X", message_digest->data[ii]); |
|
printf(" sent\n"); |
|
for (ii = 0; ii < md_len; ii++) |
|
printf("%02X", md_dat[ii]); |
|
printf(" calc\n"); |
|
} |
|
#endif |
|
PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_DIGEST_FAILURE); |
|
ret = -1; |
|
goto err; |
|
} |
|
|
|
if (!EVP_VerifyInit_ex(&mdc_tmp, EVP_get_digestbynid(md_type), NULL)) |
|
goto err; |
|
|
|
alen = ASN1_item_i2d((ASN1_VALUE *)sk, &abuf, |
|
ASN1_ITEM_rptr(PKCS7_ATTR_VERIFY)); |
|
if (alen <= 0) { |
|
PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, ERR_R_ASN1_LIB); |
|
ret = -1; |
|
goto err; |
|
} |
|
if (!EVP_VerifyUpdate(&mdc_tmp, abuf, alen)) |
|
goto err; |
|
|
|
OPENSSL_free(abuf); |
|
} |
|
|
|
os = si->enc_digest; |
|
pkey = X509_get_pubkey(x509); |
|
if (!pkey) { |
|
ret = -1; |
|
goto err; |
|
} |
|
|
|
i = EVP_VerifyFinal(&mdc_tmp, os->data, os->length, pkey); |
|
EVP_PKEY_free(pkey); |
|
if (i <= 0) { |
|
PKCS7err(PKCS7_F_PKCS7_SIGNATUREVERIFY, PKCS7_R_SIGNATURE_FAILURE); |
|
ret = -1; |
|
goto err; |
|
} else |
|
ret = 1; |
|
err: |
|
EVP_MD_CTX_cleanup(&mdc_tmp); |
|
return (ret); |
|
} |
|
|
|
PKCS7_ISSUER_AND_SERIAL *PKCS7_get_issuer_and_serial(PKCS7 *p7, int idx) |
|
{ |
|
STACK_OF(PKCS7_RECIP_INFO) *rsk; |
|
PKCS7_RECIP_INFO *ri; |
|
int i; |
|
|
|
i = OBJ_obj2nid(p7->type); |
|
if (i != NID_pkcs7_signedAndEnveloped) |
|
return NULL; |
|
if (p7->d.signed_and_enveloped == NULL) |
|
return NULL; |
|
rsk = p7->d.signed_and_enveloped->recipientinfo; |
|
if (rsk == NULL) |
|
return NULL; |
|
if (sk_PKCS7_RECIP_INFO_num(rsk) <= idx) |
|
return (NULL); |
|
ri = sk_PKCS7_RECIP_INFO_value(rsk, idx); |
|
return (ri->issuer_and_serial); |
|
} |
|
|
|
ASN1_TYPE *PKCS7_get_signed_attribute(PKCS7_SIGNER_INFO *si, int nid) |
|
{ |
|
return (get_attribute(si->auth_attr, nid)); |
|
} |
|
|
|
ASN1_TYPE *PKCS7_get_attribute(PKCS7_SIGNER_INFO *si, int nid) |
|
{ |
|
return (get_attribute(si->unauth_attr, nid)); |
|
} |
|
|
|
static ASN1_TYPE *get_attribute(STACK_OF(X509_ATTRIBUTE) *sk, int nid) |
|
{ |
|
int i; |
|
X509_ATTRIBUTE *xa; |
|
ASN1_OBJECT *o; |
|
|
|
o = OBJ_nid2obj(nid); |
|
if (!o || !sk) |
|
return (NULL); |
|
for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { |
|
xa = sk_X509_ATTRIBUTE_value(sk, i); |
|
if (OBJ_cmp(xa->object, o) == 0) { |
|
if (!xa->single && sk_ASN1_TYPE_num(xa->value.set)) |
|
return (sk_ASN1_TYPE_value(xa->value.set, 0)); |
|
else |
|
return (NULL); |
|
} |
|
} |
|
return (NULL); |
|
} |
|
|
|
ASN1_OCTET_STRING *PKCS7_digest_from_attributes(STACK_OF(X509_ATTRIBUTE) *sk) |
|
{ |
|
ASN1_TYPE *astype; |
|
if (!(astype = get_attribute(sk, NID_pkcs9_messageDigest))) |
|
return NULL; |
|
return astype->value.octet_string; |
|
} |
|
|
|
int PKCS7_set_signed_attributes(PKCS7_SIGNER_INFO *p7si, |
|
STACK_OF(X509_ATTRIBUTE) *sk) |
|
{ |
|
int i; |
|
|
|
if (p7si->auth_attr != NULL) |
|
sk_X509_ATTRIBUTE_pop_free(p7si->auth_attr, X509_ATTRIBUTE_free); |
|
p7si->auth_attr = sk_X509_ATTRIBUTE_dup(sk); |
|
if (p7si->auth_attr == NULL) |
|
return 0; |
|
for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { |
|
if ((sk_X509_ATTRIBUTE_set(p7si->auth_attr, i, |
|
X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value |
|
(sk, i)))) |
|
== NULL) |
|
return (0); |
|
} |
|
return (1); |
|
} |
|
|
|
int PKCS7_set_attributes(PKCS7_SIGNER_INFO *p7si, |
|
STACK_OF(X509_ATTRIBUTE) *sk) |
|
{ |
|
int i; |
|
|
|
if (p7si->unauth_attr != NULL) |
|
sk_X509_ATTRIBUTE_pop_free(p7si->unauth_attr, X509_ATTRIBUTE_free); |
|
p7si->unauth_attr = sk_X509_ATTRIBUTE_dup(sk); |
|
if (p7si->unauth_attr == NULL) |
|
return 0; |
|
for (i = 0; i < sk_X509_ATTRIBUTE_num(sk); i++) { |
|
if ((sk_X509_ATTRIBUTE_set(p7si->unauth_attr, i, |
|
X509_ATTRIBUTE_dup(sk_X509_ATTRIBUTE_value |
|
(sk, i)))) |
|
== NULL) |
|
return (0); |
|
} |
|
return (1); |
|
} |
|
|
|
int PKCS7_add_signed_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
|
void *value) |
|
{ |
|
return (add_attribute(&(p7si->auth_attr), nid, atrtype, value)); |
|
} |
|
|
|
int PKCS7_add_attribute(PKCS7_SIGNER_INFO *p7si, int nid, int atrtype, |
|
void *value) |
|
{ |
|
return (add_attribute(&(p7si->unauth_attr), nid, atrtype, value)); |
|
} |
|
|
|
static int add_attribute(STACK_OF(X509_ATTRIBUTE) **sk, int nid, int atrtype, |
|
void *value) |
|
{ |
|
X509_ATTRIBUTE *attr = NULL; |
|
|
|
if (*sk == NULL) { |
|
*sk = sk_X509_ATTRIBUTE_new_null(); |
|
if (*sk == NULL) |
|
return 0; |
|
new_attrib: |
|
if (!(attr = X509_ATTRIBUTE_create(nid, atrtype, value))) |
|
return 0; |
|
if (!sk_X509_ATTRIBUTE_push(*sk, attr)) { |
|
X509_ATTRIBUTE_free(attr); |
|
return 0; |
|
} |
|
} else { |
|
int i; |
|
|
|
for (i = 0; i < sk_X509_ATTRIBUTE_num(*sk); i++) { |
|
attr = sk_X509_ATTRIBUTE_value(*sk, i); |
|
if (OBJ_obj2nid(attr->object) == nid) { |
|
X509_ATTRIBUTE_free(attr); |
|
attr = X509_ATTRIBUTE_create(nid, atrtype, value); |
|
if (attr == NULL) |
|
return 0; |
|
if (!sk_X509_ATTRIBUTE_set(*sk, i, attr)) { |
|
X509_ATTRIBUTE_free(attr); |
|
return 0; |
|
} |
|
goto end; |
|
} |
|
} |
|
goto new_attrib; |
|
} |
|
end: |
|
return (1); |
|
}
|
|
|