1305 lines
30 KiB
C
1305 lines
30 KiB
C
/* crypto/pkcs7/pk7_doit.c */
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/* 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
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* 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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*
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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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#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>
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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);
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static int PKCS7_type_is_other(PKCS7* p7)
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{
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int isOther=1;
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int nid=OBJ_obj2nid(p7->type);
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switch( nid )
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{
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case NID_pkcs7_data:
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case NID_pkcs7_signed:
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case NID_pkcs7_enveloped:
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case NID_pkcs7_signedAndEnveloped:
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case NID_pkcs7_digest:
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case NID_pkcs7_encrypted:
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isOther=0;
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break;
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default:
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isOther=1;
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}
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return isOther;
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}
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static ASN1_OCTET_STRING *PKCS7_get_octet_string(PKCS7 *p7)
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{
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if ( PKCS7_type_is_data(p7))
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return p7->d.data;
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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;
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return NULL;
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}
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static int PKCS7_bio_add_digest(BIO **pbio, X509_ALGOR *alg)
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{
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BIO *btmp;
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const EVP_MD *md;
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if ((btmp=BIO_new(BIO_f_md())) == NULL)
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{
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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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}
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md=EVP_get_digestbyobj(alg->algorithm);
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if (md == NULL)
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{
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PKCS7err(PKCS7_F_PKCS7_BIO_ADD_DIGEST,PKCS7_R_UNKNOWN_DIGEST_TYPE);
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goto err;
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}
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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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{
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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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}
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btmp=NULL;
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return 1;
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err:
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if (btmp)
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BIO_free(btmp);
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return 0;
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}
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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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{
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EVP_PKEY_CTX *pctx = NULL;
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EVP_PKEY *pkey = NULL;
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unsigned char *ek = NULL;
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int ret = 0;
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size_t eklen;
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pkey = X509_get_pubkey(ri->cert);
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if (!pkey)
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return 0;
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pctx = EVP_PKEY_CTX_new(pkey, NULL);
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if (!pctx)
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return 0;
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if (EVP_PKEY_encrypt_init(pctx) <= 0)
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goto err;
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if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_ENCRYPT,
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EVP_PKEY_CTRL_PKCS7_ENCRYPT, 0, ri) <= 0)
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{
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PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, PKCS7_R_CTRL_ERROR);
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goto err;
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}
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if (EVP_PKEY_encrypt(pctx, NULL, &eklen, key, keylen) <= 0)
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goto err;
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ek = OPENSSL_malloc(eklen);
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if (ek == NULL)
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{
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PKCS7err(PKCS7_F_PKCS7_ENCODE_RINFO, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (EVP_PKEY_encrypt(pctx, ek, &eklen, key, keylen) <= 0)
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goto err;
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ASN1_STRING_set0(ri->enc_key, ek, eklen);
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ek = NULL;
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ret = 1;
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err:
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if (pkey)
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EVP_PKEY_free(pkey);
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if (pctx)
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EVP_PKEY_CTX_free(pctx);
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if (ek)
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OPENSSL_free(ek);
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return ret;
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}
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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)
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{
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EVP_PKEY_CTX *pctx = NULL;
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unsigned char *ek = NULL;
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size_t eklen;
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int ret = -1;
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pctx = EVP_PKEY_CTX_new(pkey, NULL);
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if (!pctx)
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return -1;
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if (EVP_PKEY_decrypt_init(pctx) <= 0)
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goto err;
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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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{
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PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, PKCS7_R_CTRL_ERROR);
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goto err;
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}
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if (EVP_PKEY_decrypt(pctx, NULL, &eklen,
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ri->enc_key->data, ri->enc_key->length) <= 0)
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goto err;
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ek = OPENSSL_malloc(eklen);
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if (ek == NULL)
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{
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PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (EVP_PKEY_decrypt(pctx, ek, &eklen,
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ri->enc_key->data, ri->enc_key->length) <= 0)
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{
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ret = 0;
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PKCS7err(PKCS7_F_PKCS7_DECRYPT_RINFO, ERR_R_EVP_LIB);
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goto err;
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}
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ret = 1;
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if (*pek)
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{
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OPENSSL_cleanse(*pek, *peklen);
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OPENSSL_free(*pek);
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}
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*pek = ek;
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*peklen = eklen;
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err:
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if (pctx)
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EVP_PKEY_CTX_free(pctx);
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if (!ret && ek)
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OPENSSL_free(ek);
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return ret;
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}
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BIO *PKCS7_dataInit(PKCS7 *p7, BIO *bio)
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{
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int i;
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BIO *out=NULL,*btmp=NULL;
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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;
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i=OBJ_obj2nid(p7->type);
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p7->state=PKCS7_S_HEADER;
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switch (i)
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{
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case NID_pkcs7_signed:
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md_sk=p7->d.sign->md_algs;
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os = PKCS7_get_octet_string(p7->d.sign->contents);
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break;
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case NID_pkcs7_signedAndEnveloped:
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rsk=p7->d.signed_and_enveloped->recipientinfo;
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md_sk=p7->d.signed_and_enveloped->md_algs;
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xalg=p7->d.signed_and_enveloped->enc_data->algorithm;
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evp_cipher=p7->d.signed_and_enveloped->enc_data->cipher;
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if (evp_cipher == NULL)
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{
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PKCS7err(PKCS7_F_PKCS7_DATAINIT,
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PKCS7_R_CIPHER_NOT_INITIALIZED);
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goto err;
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}
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break;
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case NID_pkcs7_enveloped:
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rsk=p7->d.enveloped->recipientinfo;
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xalg=p7->d.enveloped->enc_data->algorithm;
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evp_cipher=p7->d.enveloped->enc_data->cipher;
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if (evp_cipher == NULL)
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{
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PKCS7err(PKCS7_F_PKCS7_DATAINIT,
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PKCS7_R_CIPHER_NOT_INITIALIZED);
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goto err;
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}
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break;
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case NID_pkcs7_digest:
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xa = p7->d.digest->md;
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os = PKCS7_get_octet_string(p7->d.digest->contents);
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break;
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case NID_pkcs7_data:
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break;
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default:
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PKCS7err(PKCS7_F_PKCS7_DATAINIT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
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goto err;
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}
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for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
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if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
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goto err;
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if (xa && !PKCS7_bio_add_digest(&out, xa))
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goto err;
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if (evp_cipher != NULL)
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{
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unsigned char key[EVP_MAX_KEY_LENGTH];
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unsigned char iv[EVP_MAX_IV_LENGTH];
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int keylen,ivlen;
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EVP_CIPHER_CTX *ctx;
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if ((btmp=BIO_new(BIO_f_cipher())) == NULL)
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{
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PKCS7err(PKCS7_F_PKCS7_DATAINIT,ERR_R_BIO_LIB);
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goto err;
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}
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BIO_get_cipher_ctx(btmp, &ctx);
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keylen=EVP_CIPHER_key_length(evp_cipher);
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ivlen=EVP_CIPHER_iv_length(evp_cipher);
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xalg->algorithm = OBJ_nid2obj(EVP_CIPHER_type(evp_cipher));
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if (ivlen > 0)
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if (RAND_pseudo_bytes(iv,ivlen) <= 0)
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goto err;
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if (EVP_CipherInit_ex(ctx, evp_cipher, NULL, NULL, NULL, 1)<=0)
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goto err;
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if (EVP_CIPHER_CTX_rand_key(ctx, key) <= 0)
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goto err;
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if (EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, 1) <= 0)
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goto err;
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if (ivlen > 0) {
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if (xalg->parameter == NULL) {
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xalg->parameter = ASN1_TYPE_new();
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if (xalg->parameter == NULL)
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goto err;
|
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}
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if(EVP_CIPHER_param_to_asn1(ctx, xalg->parameter) < 0)
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goto err;
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}
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/* Lets do the pub key stuff :-) */
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for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
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{
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ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
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if (pkcs7_encode_rinfo(ri, key, keylen) <= 0)
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goto err;
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}
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OPENSSL_cleanse(key, keylen);
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if (out == NULL)
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out=btmp;
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else
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BIO_push(out,btmp);
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btmp=NULL;
|
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}
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|
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if (bio == NULL)
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{
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if (PKCS7_is_detached(p7))
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bio=BIO_new(BIO_s_null());
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else if (os && os->length > 0)
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bio = BIO_new_mem_buf(os->data, os->length);
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if(bio == NULL)
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{
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bio=BIO_new(BIO_s_mem());
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if (bio == NULL)
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goto err;
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BIO_set_mem_eof_return(bio,0);
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}
|
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}
|
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if (out)
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BIO_push(out,bio);
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else
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out = bio;
|
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bio=NULL;
|
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if (0)
|
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{
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err:
|
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if (out != NULL)
|
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BIO_free_all(out);
|
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if (btmp != NULL)
|
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BIO_free_all(btmp);
|
|
out=NULL;
|
|
}
|
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return(out);
|
|
}
|
|
|
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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,
|
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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;
|
|
|
|
i=OBJ_obj2nid(p7->type);
|
|
p7->state=PKCS7_S_HEADER;
|
|
|
|
switch (i)
|
|
{
|
|
case NID_pkcs7_signed:
|
|
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=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=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;
|
|
}
|
|
|
|
/* 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 (PKCS7_is_detached(p7) || (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());
|
|
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;
|
|
|
|
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);
|
|
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);
|
|
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) && !(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 (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;
|
|
ri=sk_PKCS7_RECIP_INFO_value(rsk,0);
|
|
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);
|
|
}
|
|
|