/* 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;

 }