133 lines
4.7 KiB
C
133 lines
4.7 KiB
C
/* p5_crpt.c */
|
|
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
|
|
* project 1999.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* licensing@OpenSSL.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "cryptlib.h"
|
|
#include <openssl/x509.h>
|
|
#include <openssl/evp.h>
|
|
|
|
/* Doesn't do anything now: Builtin PBE algorithms in static table.
|
|
*/
|
|
|
|
void PKCS5_PBE_add(void)
|
|
{
|
|
}
|
|
|
|
int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
|
|
ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md,
|
|
int en_de)
|
|
{
|
|
EVP_MD_CTX ctx;
|
|
unsigned char md_tmp[EVP_MAX_MD_SIZE];
|
|
unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
|
|
int i;
|
|
PBEPARAM *pbe;
|
|
int saltlen, iter;
|
|
unsigned char *salt;
|
|
const unsigned char *pbuf;
|
|
int mdsize;
|
|
|
|
/* Extract useful info from parameter */
|
|
if (param == NULL || param->type != V_ASN1_SEQUENCE ||
|
|
param->value.sequence == NULL) {
|
|
EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
pbuf = param->value.sequence->data;
|
|
if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
|
|
EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
if (!pbe->iter) iter = 1;
|
|
else iter = ASN1_INTEGER_get (pbe->iter);
|
|
salt = pbe->salt->data;
|
|
saltlen = pbe->salt->length;
|
|
|
|
if(!pass) passlen = 0;
|
|
else if(passlen == -1) passlen = strlen(pass);
|
|
|
|
EVP_MD_CTX_init(&ctx);
|
|
EVP_DigestInit_ex(&ctx, md, NULL);
|
|
EVP_DigestUpdate(&ctx, pass, passlen);
|
|
EVP_DigestUpdate(&ctx, salt, saltlen);
|
|
PBEPARAM_free(pbe);
|
|
EVP_DigestFinal_ex(&ctx, md_tmp, NULL);
|
|
mdsize = EVP_MD_size(md);
|
|
if (mdsize < 0)
|
|
return 0;
|
|
for (i = 1; i < iter; i++) {
|
|
EVP_DigestInit_ex(&ctx, md, NULL);
|
|
EVP_DigestUpdate(&ctx, md_tmp, mdsize);
|
|
EVP_DigestFinal_ex (&ctx, md_tmp, NULL);
|
|
}
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp));
|
|
memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher));
|
|
OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16);
|
|
memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
|
|
EVP_CIPHER_iv_length(cipher));
|
|
EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de);
|
|
OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
|
|
OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
|
|
OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
|
|
return 1;
|
|
}
|