1 /* p5_pbe.c */

     2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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@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@cryptsoft.com).  This product includes software written by Tim

    55  * Hudson (tjh@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 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */

    75 

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

    77 	     int saltlen)

    78 {

    79 	PBEPARAM *pbe=NULL;

    80 	ASN1_OBJECT *al;

    81 	X509_ALGOR *algor;

    82 	ASN1_TYPE *astype=NULL;

    83 

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

    85 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

    86 		goto err;

    87 	}

    88 	if(iter <= 0) iter = PKCS5_DEFAULT_ITER;

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

    90 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

    91 		goto err;

    92 	}

    93 	if (!saltlen) saltlen = PKCS5_SALT_LEN;

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

    95 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

    96 		goto err;

    97 	}

    98 	pbe->salt->length = saltlen;

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

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

   101 		goto err;

   102 

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

   104 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

   105 		goto err;

   106 	}

   107 

   108 	astype->type = V_ASN1_SEQUENCE;

   109 	if(!ASN1_pack_string_of(PBEPARAM, pbe, i2d_PBEPARAM,

   110 				&astype->value.sequence)) {

   111 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

   112 		goto err;

   113 	}

   114 	PBEPARAM_free (pbe);

   115 	pbe = NULL;

   116 	

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

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

   119 		ASN1err(ASN1_F_PKCS5_PBE_SET,ERR_R_MALLOC_FAILURE);

   120 		goto err;

   121 	}

   122 	ASN1_OBJECT_free(algor->algorithm);

   123 	algor->algorithm = al;

   124 	algor->parameter = astype;

   125 

   126 	return (algor);

   127 err:

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

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

   130 	return NULL;

   131 }