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/* 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;
int rv = 0;
EVP_MD_CTX_init(&ctx);
/* 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);
if (!EVP_DigestInit_ex(&ctx, md, NULL))
goto err;
if (!EVP_DigestUpdate(&ctx, pass, passlen))
goto err;
if (!EVP_DigestUpdate(&ctx, salt, saltlen))
goto err;
PBEPARAM_free(pbe);
if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL))
goto err;
mdsize = EVP_MD_size(md);
if (mdsize < 0)
return 0;
for (i = 1; i < iter; i++) {
if (!EVP_DigestInit_ex(&ctx, md, NULL))
goto err;
if (!EVP_DigestUpdate(&ctx, md_tmp, mdsize))
goto err;
if (!EVP_DigestFinal_ex (&ctx, md_tmp, NULL))
goto err;
}
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));
if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
goto err;
OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
rv = 1;
err:
EVP_MD_CTX_cleanup(&ctx);
return rv;
}
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