/* 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;

 }