/* p5_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 "cryptlib.h"

#include <openssl/asn1t.h>

#include <openssl/x509.h>

#include <openssl/rand.h>

/* PKCS#5 password based encryption structure */

ASN1_SEQUENCE(PBEPARAM) = {

	ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),

	ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)

} ASN1_SEQUENCE_END(PBEPARAM)

IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)

/* Return an algorithm identifier for a PKCS#5 PBE algorithm */

EXPORT_C X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt,

	     int saltlen)

{

	PBEPARAM *pbe=NULL;

	ASN1_OBJECT *al;

	X509_ALGOR *algor;

	ASN1_TYPE *astype=NULL;

	if (!(pbe = PBEPARAM_new ())) {

		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

		goto err;

	}

	if(iter <= 0) iter = PKCS5_DEFAULT_ITER;

	if (!ASN1_INTEGER_set(pbe->iter, iter)) {

		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

		goto err;

	}

	if (!saltlen) saltlen = PKCS5_SALT_LEN;

	if (!(pbe->salt->data = OPENSSL_malloc (saltlen))) {

		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

		goto err;

	}

	pbe->salt->length = saltlen;

	if (salt) memcpy (pbe->salt->data, salt, saltlen);

	else if (RAND_pseudo_bytes (pbe->salt->data, saltlen) < 0)

		goto err;

	if (!(astype = ASN1_TYPE_new())) {

		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

		goto err;

	}

	astype->type = V_ASN1_SEQUENCE;

	if(!ASN1_pack_string_of(PBEPARAM, pbe, i2d_PBEPARAM,

				&astype->value.sequence)) {

		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

		goto err;

	}

	PBEPARAM_free (pbe);

	pbe = NULL;

	al = OBJ_nid2obj(alg); /* never need to free al */

	if (!(algor = X509_ALGOR_new())) {

		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

		goto err;

	}

	ASN1_OBJECT_free(algor->algorithm);

	algor->algorithm = al;

	algor->parameter = astype;

	return (algor);

err:

	if (pbe != NULL) PBEPARAM_free(pbe);

	if (astype != NULL) ASN1_TYPE_free(astype);

	return NULL;

}