/* p5_pbe.c */

/*

 * Written by Dr Stephen N Henson (steve@openssl.org) 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)

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

int PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter,

                         const unsigned char *salt, int saltlen)

{

    PBEPARAM *pbe = NULL;

    ASN1_STRING *pbe_str = NULL;

    unsigned char *sstr;

    pbe = PBEPARAM_new();

    if (!pbe) {

        ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, 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_SET0_ALGOR, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    if (!saltlen)

        saltlen = PKCS5_SALT_LEN;

    if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) {

        ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    sstr = ASN1_STRING_data(pbe->salt);

    if (salt)

        memcpy(sstr, salt, saltlen);

    else if (RAND_bytes(sstr, saltlen) <= 0)

        goto err;

    if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) {

        ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);

        goto err;

    }

    PBEPARAM_free(pbe);

    pbe = NULL;

    if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))

        return 1;

 err:

    if (pbe != NULL)

        PBEPARAM_free(pbe);

    if (pbe_str != NULL)

        ASN1_STRING_free(pbe_str);

    return 0;

}

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

X509_ALGOR *PKCS5_pbe_set(int alg, int iter,

                          const unsigned char *salt, int saltlen)

{

    X509_ALGOR *ret;

    ret = X509_ALGOR_new();

    if (!ret) {

        ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);

        return NULL;

    }

    if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))

        return ret;

    X509_ALGOR_free(ret);

    return NULL;

}