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      1 /* p5_pbe.c */
      2 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL
      3  * project 1999.
      4  */
      5 /* ====================================================================
      6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in
     17  *    the documentation and/or other materials provided with the
     18  *    distribution.
     19  *
     20  * 3. All advertising materials mentioning features or use of this
     21  *    software must display the following acknowledgment:
     22  *    "This product includes software developed by the OpenSSL Project
     23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
     24  *
     25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
     26  *    endorse or promote products derived from this software without
     27  *    prior written permission. For written permission, please contact
     28  *    licensing (at) OpenSSL.org.
     29  *
     30  * 5. Products derived from this software may not be called "OpenSSL"
     31  *    nor may "OpenSSL" appear in their names without prior written
     32  *    permission of the OpenSSL Project.
     33  *
     34  * 6. Redistributions of any form whatsoever must retain the following
     35  *    acknowledgment:
     36  *    "This product includes software developed by the OpenSSL Project
     37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
     38  *
     39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
     40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
     43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
     50  * OF THE POSSIBILITY OF SUCH DAMAGE.
     51  * ====================================================================
     52  *
     53  * This product includes cryptographic software written by Eric Young
     54  * (eay (at) cryptsoft.com).  This product includes software written by Tim
     55  * Hudson (tjh (at) cryptsoft.com).
     56  *
     57  */
     58 
     59 #include <stdio.h>
     60 #include "cryptlib.h"
     61 #include <openssl/asn1t.h>
     62 #include <openssl/x509.h>
     63 #include <openssl/rand.h>
     64 
     65 /* PKCS#5 password based encryption structure */
     66 
     67 ASN1_SEQUENCE(PBEPARAM) = {
     68 	ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
     69 	ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
     70 } ASN1_SEQUENCE_END(PBEPARAM)
     71 
     72 IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
     73 
     74 
     75 /* Set an algorithm identifier for a PKCS#5 PBE algorithm */
     76 
     77 int PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter,
     78 				const unsigned char *salt, int saltlen)
     79 	{
     80 	PBEPARAM *pbe=NULL;
     81 	ASN1_STRING *pbe_str=NULL;
     82 	unsigned char *sstr;
     83 
     84 	pbe = PBEPARAM_new();
     85 	if (!pbe)
     86 		{
     87 		ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR,ERR_R_MALLOC_FAILURE);
     88 		goto err;
     89 		}
     90 	if(iter <= 0)
     91 		iter = PKCS5_DEFAULT_ITER;
     92 	if (!ASN1_INTEGER_set(pbe->iter, iter))
     93 		{
     94 		ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR,ERR_R_MALLOC_FAILURE);
     95 		goto err;
     96 		}
     97 	if (!saltlen)
     98 		saltlen = PKCS5_SALT_LEN;
     99 	if (!ASN1_STRING_set(pbe->salt, NULL, saltlen))
    100 		{
    101 		ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR,ERR_R_MALLOC_FAILURE);
    102 		goto err;
    103 		}
    104 	sstr = ASN1_STRING_data(pbe->salt);
    105 	if (salt)
    106 		memcpy(sstr, salt, saltlen);
    107 	else if (RAND_pseudo_bytes(sstr, saltlen) < 0)
    108 		goto err;
    109 
    110 	if(!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str))
    111 		{
    112 		ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR,ERR_R_MALLOC_FAILURE);
    113 		goto err;
    114 		}
    115 
    116 	PBEPARAM_free(pbe);
    117 	pbe = NULL;
    118 
    119 	if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))
    120 		return 1;
    121 
    122 err:
    123 	if (pbe != NULL)
    124 		PBEPARAM_free(pbe);
    125 	if (pbe_str != NULL)
    126 		ASN1_STRING_free(pbe_str);
    127 	return 0;
    128 	}
    129 
    130 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
    131 
    132 X509_ALGOR *PKCS5_pbe_set(int alg, int iter,
    133 				const unsigned char *salt, int saltlen)
    134 	{
    135 	X509_ALGOR *ret;
    136 	ret = X509_ALGOR_new();
    137 	if (!ret)
    138 		{
    139 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);
    140 		return NULL;
    141 		}
    142 
    143 	if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))
    144 		return ret;
    145 
    146 	X509_ALGOR_free(ret);
    147 	return NULL;
    148 	}
    149