crypto/openssl-0.9.7e/crypto/asn1/p5_pbe.c

   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 X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt,
  77              int saltlen)
  78 {
  79         PBEPARAM *pbe;
  80         ASN1_OBJECT *al;
  81         X509_ALGOR *algor;
  82         ASN1_TYPE *astype;
  83
  84         if (!(pbe = PBEPARAM_new ())) {
  85                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
  86                 return NULL;
  87         }
  88         if(iter <= 0) iter = PKCS5_DEFAULT_ITER;
  89         ASN1_INTEGER_set (pbe->iter, iter);
  90         if (!saltlen) saltlen = PKCS5_SALT_LEN;
  91         if (!(pbe->salt->data = OPENSSL_malloc (saltlen))) {
  92                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
  93                 return NULL;
  94         }
  95         pbe->salt->length = saltlen;
  96         if (salt) memcpy (pbe->salt->data, salt, saltlen);
  97         else if (RAND_pseudo_bytes (pbe->salt->data, saltlen) < 0)
  98                 return NULL;
  99
 100         if (!(astype = ASN1_TYPE_new())) {
 101                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
 102                 return NULL;
 103         }
 104
 105         astype->type = V_ASN1_SEQUENCE;
 106         if(!ASN1_pack_string(pbe, i2d_PBEPARAM, &astype->value.sequence)) {
 107                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
 108                 return NULL;
 109         }
 110         PBEPARAM_free (pbe);
 111
 112         al = OBJ_nid2obj(alg); /* never need to free al */
 113         if (!(algor = X509_ALGOR_new())) {
 114                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
 115                 return NULL;
 116         }
 117         ASN1_OBJECT_free(algor->algorithm);
 118         algor->algorithm = al;
 119         algor->parameter = astype;
 120
 121         return (algor);
 122 }