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/asn1_mac.h>
  62 #include <openssl/rand.h>
  63
  64 /* PKCS#5 password based encryption structure */
  65
  66 int i2d_PBEPARAM(PBEPARAM *a, unsigned char **pp)
  67 {
  68         M_ASN1_I2D_vars(a);
  69         M_ASN1_I2D_len (a->salt, i2d_ASN1_OCTET_STRING);
  70         M_ASN1_I2D_len (a->iter, i2d_ASN1_INTEGER);
  71
  72         M_ASN1_I2D_seq_total ();
  73
  74         M_ASN1_I2D_put (a->salt, i2d_ASN1_OCTET_STRING);
  75         M_ASN1_I2D_put (a->iter, i2d_ASN1_INTEGER);
  76         M_ASN1_I2D_finish();
  77 }
  78
  79 PBEPARAM *PBEPARAM_new(void)
  80 {
  81         PBEPARAM *ret=NULL;
  82         ASN1_CTX c;
  83         M_ASN1_New_Malloc(ret, PBEPARAM);
  84         M_ASN1_New(ret->iter,ASN1_INTEGER_new);
  85         M_ASN1_New(ret->salt,ASN1_OCTET_STRING_new);
  86         return (ret);
  87         M_ASN1_New_Error(ASN1_F_PBEPARAM_NEW);
  88 }
  89
  90 PBEPARAM *d2i_PBEPARAM(PBEPARAM **a, unsigned char **pp, long length)
  91 {
  92         M_ASN1_D2I_vars(a,PBEPARAM *,PBEPARAM_new);
  93         M_ASN1_D2I_Init();
  94         M_ASN1_D2I_start_sequence();
  95         M_ASN1_D2I_get (ret->salt, d2i_ASN1_OCTET_STRING);
  96         M_ASN1_D2I_get (ret->iter, d2i_ASN1_INTEGER);
  97         M_ASN1_D2I_Finish(a, PBEPARAM_free, ASN1_F_D2I_PBEPARAM);
  98 }
  99
 100 void PBEPARAM_free (PBEPARAM *a)
 101 {
 102         if(a==NULL) return;
 103         ASN1_OCTET_STRING_free(a->salt);
 104         ASN1_INTEGER_free (a->iter);
 105         Free ((char *)a);
 106 }
 107
 108 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
 109
 110 X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt,
 111              int saltlen)
 112 {
 113         PBEPARAM *pbe;
 114         ASN1_OBJECT *al;
 115         X509_ALGOR *algor;
 116         ASN1_TYPE *astype;
 117
 118         if (!(pbe = PBEPARAM_new ())) {
 119                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
 120                 return NULL;
 121         }
 122         ASN1_INTEGER_set (pbe->iter, iter);
 123         if (!saltlen) saltlen = PKCS5_SALT_LEN;
 124         if (!(pbe->salt->data = Malloc (saltlen))) {
 125                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
 126                 return NULL;
 127         }
 128         pbe->salt->length = saltlen;
 129         if (salt) memcpy (pbe->salt->data, salt, saltlen);
 130         else RAND_bytes (pbe->salt->data, saltlen);
 131
 132         if (!(astype = ASN1_TYPE_new())) {
 133                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
 134                 return NULL;
 135         }
 136
 137         astype->type = V_ASN1_SEQUENCE;
 138         if(!ASN1_pack_string(pbe, i2d_PBEPARAM, &astype->value.sequence)) {
 139                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
 140                 return NULL;
 141         }
 142         PBEPARAM_free (pbe);
 143
 144         al = OBJ_nid2obj(alg); /* never need to free al */
 145         if (!(algor = X509_ALGOR_new())) {
 146                 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE);
 147                 return NULL;
 148         }
 149         ASN1_OBJECT_free(algor->algorithm);
 150         algor->algorithm = al;
 151         algor->parameter = astype;
 152
 153         return (algor);
 154 }