/* 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).

 *

 */

 /*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include "cryptlib.h"

#include <openssl/evp.h>

#include <openssl/x509.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libcrypto_wsd_macros.h"

#include "libcrypto_wsd.h"

#endif

#ifndef EMULATOR

/* Password based encryption (PBE) functions */

static STACK *pbe_algs;

#else

GET_STATIC_VAR_FROM_TLS(pbe_algs,evp_pbe,STACK *)

#define pbe_algs (*GET_WSD_VAR_NAME(pbe_algs,evp_pbe,s)())

#endif

/* Setup a cipher context from a PBE algorithm */

typedef struct {

int pbe_nid;

const EVP_CIPHER *cipher;

const EVP_MD *md;

EVP_PBE_KEYGEN *keygen;

} EVP_PBE_CTL;

EXPORT_C 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) BUF_strlcpy (obj_tmp, "NULL", sizeof obj_tmp);

		else i2t_ASN1_OBJECT(obj_tmp, sizeof obj_tmp, pbe_obj);

		ERR_add_error_data(2, "TYPE=", obj_tmp);

		return 0;

	}

	if(!pass) passlen = 0;

	else 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(const char * const *a, const char * const *b)

{

	const EVP_PBE_CTL * const *pbe1 = (const EVP_PBE_CTL * const *) a,

			* const *pbe2 = (const EVP_PBE_CTL * const *)b;

	return ((*pbe1)->pbe_nid - (*pbe2)->pbe_nid);

}

/* Add a PBE algorithm */

EXPORT_C int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const 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*) OPENSSL_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;

}

EXPORT_C void EVP_PBE_cleanup(void)

{

	sk_pop_free(pbe_algs, OPENSSL_freeFunc);

	pbe_algs = NULL;

}