/* $OpenBSD: p5_pbe.c,v 1.23 2021/12/25 13:17:48 jsing Exp $ */

/* 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 <stdlib.h>

#include <string.h>

#include <openssl/asn1t.h>

#include <openssl/err.h>

#include <openssl/x509.h>

/* PKCS#5 password based encryption structure */

static const ASN1_TEMPLATE PBEPARAM_seq_tt[] = {

  {

    .offset = offsetof(PBEPARAM, salt),

    .field_name = "salt",

    .item = &ASN1_OCTET_STRING_it,

  },

  {

    .offset = offsetof(PBEPARAM, iter),

    .field_name = "iter",

    .item = &ASN1_INTEGER_it,

  },

};

const ASN1_ITEM PBEPARAM_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = PBEPARAM_seq_tt,

  .tcount = sizeof(PBEPARAM_seq_tt) / sizeof(ASN1_TEMPLATE),

  .size = sizeof(PBEPARAM),

  .sname = "PBEPARAM",

};

PBEPARAM *

d2i_PBEPARAM(PBEPARAM **a, const unsigned char **in, long len)

{

  return (PBEPARAM *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &PBEPARAM_it);

}

int

i2d_PBEPARAM(PBEPARAM *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &PBEPARAM_it);

}

PBEPARAM *

PBEPARAM_new(void)

{

  return (PBEPARAM *)ASN1_item_new(&PBEPARAM_it);

}

void

PBEPARAM_free(PBEPARAM *a)

{

  ASN1_item_free((ASN1_VALUE *)a, &PBEPARAM_it);

}

/* 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) {

    ASN1error(ERR_R_MALLOC_FAILURE);

    goto err;

  }

  if (iter <= 0)

    iter = PKCS5_DEFAULT_ITER;

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

    ASN1error(ERR_R_MALLOC_FAILURE);

    goto err;

  }

  if (!saltlen)

    saltlen = PKCS5_SALT_LEN;

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

    ASN1error(ERR_R_MALLOC_FAILURE);

    goto err;

  }

  sstr = ASN1_STRING_data(pbe->salt);

  if (salt)

    memcpy(sstr, salt, saltlen);

  else

    arc4random_buf(sstr, saltlen);

  if (!ASN1_item_pack(pbe, &PBEPARAM_it, &pbe_str)) {

    ASN1error(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);

  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) {

    ASN1error(ERR_R_MALLOC_FAILURE);

    return NULL;

  }

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

    return ret;

  X509_ALGOR_free(ret);

  return NULL;

}