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/* evp_pbe.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 <openssl/evp.h>
#include <openssl/x509.h>
#include "cryptlib.h"
/* Password based encryption (PBE) functions */
static STACK *pbe_algs;
/* Setup a cipher context from a PBE algorithm */
typedef struct {
int pbe_nid;
EVP_CIPHER *cipher;
EVP_MD *md;
EVP_PBE_KEYGEN *keygen;
} EVP_PBE_CTL;
int EVP_PBE_CipherInit (ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de)
{
EVP_PBE_CTL *pbetmp, pbelu;
int i;
pbelu.pbe_nid = OBJ_obj2nid(pbe_obj);
if (pbelu.pbe_nid != NID_undef) i = sk_find(pbe_algs, (char *)&pbelu);
else i = -1;
if (i == -1) {
char obj_tmp[80];
EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_PBE_ALGORITHM);
if (!pbe_obj) strcpy (obj_tmp, "NULL");
else i2t_ASN1_OBJECT(obj_tmp, 80, pbe_obj);
ERR_add_error_data(2, "TYPE=", obj_tmp);
return 0;
}
if (passlen == -1) passlen = strlen(pass);
pbetmp = (EVP_PBE_CTL *)sk_value (pbe_algs, i);
i = (*pbetmp->keygen)(ctx, pass, passlen, param, pbetmp->cipher,
pbetmp->md, en_de);
if (!i) {
EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_KEYGEN_FAILURE);
return 0;
}
return 1;
}
static int pbe_cmp (EVP_PBE_CTL **pbe1, EVP_PBE_CTL **pbe2)
{
return ((*pbe1)->pbe_nid - (*pbe2)->pbe_nid);
}
/* Add a PBE algorithm */
int EVP_PBE_alg_add (int nid, EVP_CIPHER *cipher, EVP_MD *md,
EVP_PBE_KEYGEN *keygen)
{
EVP_PBE_CTL *pbe_tmp;
if (!pbe_algs) pbe_algs = sk_new (pbe_cmp);
if (!(pbe_tmp = (EVP_PBE_CTL*) Malloc (sizeof(EVP_PBE_CTL)))) {
EVPerr(EVP_F_EVP_PBE_ALG_ADD,ERR_R_MALLOC_FAILURE);
return 0;
}
pbe_tmp->pbe_nid = nid;
pbe_tmp->cipher = cipher;
pbe_tmp->md = md;
pbe_tmp->keygen = keygen;
sk_push (pbe_algs, (char *)pbe_tmp);
return 1;
}
void EVP_PBE_cleanup(void)
{
sk_pop_free(pbe_algs, FreeFunc);
pbe_algs = NULL;
}
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