crypto/asn1/p5_pbe.c

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