crypto/libressl/crypto/asn1/p5_pbe.c

   1 /* $OpenBSD: p5_pbe.c,v 1.19 2015/02/11 03:39:51 jsing Exp $ */
   2 /* Written by Dr Stephen N Henson (steve@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@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 <stdlib.h>
  61 #include <string.h>
  62
  63 #include <openssl/asn1t.h>
  64 #include <openssl/err.h>
  65 #include <openssl/x509.h>
  66
  67 /* PKCS#5 password based encryption structure */
  68
  69 static const ASN1_TEMPLATE PBEPARAM_seq_tt[] = {
  70         {
  71                 .offset = offsetof(PBEPARAM, salt),
  72                 .field_name = "salt",
  73                 .item = &ASN1_OCTET_STRING_it,
  74         },
  75         {
  76                 .offset = offsetof(PBEPARAM, iter),
  77                 .field_name = "iter",
  78                 .item = &ASN1_INTEGER_it,
  79         },
  80 };
  81
  82 const ASN1_ITEM PBEPARAM_it = {
  83         .itype = ASN1_ITYPE_SEQUENCE,
  84         .utype = V_ASN1_SEQUENCE,
  85         .templates = PBEPARAM_seq_tt,
  86         .tcount = sizeof(PBEPARAM_seq_tt) / sizeof(ASN1_TEMPLATE),
  87         .size = sizeof(PBEPARAM),
  88         .sname = "PBEPARAM",
  89 };
  90
  91
  92 PBEPARAM *
  93 d2i_PBEPARAM(PBEPARAM **a, const unsigned char **in, long len)
  94 {
  95         return (PBEPARAM *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
  96             &PBEPARAM_it);
  97 }
  98
  99 int
 100 i2d_PBEPARAM(PBEPARAM *a, unsigned char **out)
 101 {
 102         return ASN1_item_i2d((ASN1_VALUE *)a, out, &PBEPARAM_it);
 103 }
 104
 105 PBEPARAM *
 106 PBEPARAM_new(void)
 107 {
 108         return (PBEPARAM *)ASN1_item_new(&PBEPARAM_it);
 109 }
 110
 111 void
 112 PBEPARAM_free(PBEPARAM *a)
 113 {
 114         ASN1_item_free((ASN1_VALUE *)a, &PBEPARAM_it);
 115 }
 116
 117
 118 /* Set an algorithm identifier for a PKCS#5 PBE algorithm */
 119
 120 int
 121 PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter,
 122     const unsigned char *salt, int saltlen)
 123 {
 124         PBEPARAM *pbe = NULL;
 125         ASN1_STRING *pbe_str = NULL;
 126         unsigned char *sstr;
 127
 128         pbe = PBEPARAM_new();
 129         if (!pbe) {
 130                 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
 131                 goto err;
 132         }
 133         if (iter <= 0)
 134                 iter = PKCS5_DEFAULT_ITER;
 135         if (!ASN1_INTEGER_set(pbe->iter, iter)) {
 136                 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
 137                 goto err;
 138         }
 139         if (!saltlen)
 140                 saltlen = PKCS5_SALT_LEN;
 141         if (!ASN1_STRING_set(pbe->salt, NULL, saltlen)) {
 142                 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
 143                 goto err;
 144         }
 145         sstr = ASN1_STRING_data(pbe->salt);
 146         if (salt)
 147                 memcpy(sstr, salt, saltlen);
 148         else
 149                 arc4random_buf(sstr, saltlen);
 150
 151         if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) {
 152                 ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
 153                 goto err;
 154         }
 155
 156         PBEPARAM_free(pbe);
 157         pbe = NULL;
 158
 159         if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))
 160                 return 1;
 161
 162 err:
 163         if (pbe != NULL)
 164                 PBEPARAM_free(pbe);
 165         ASN1_STRING_free(pbe_str);
 166         return 0;
 167 }
 168
 169 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
 170
 171 X509_ALGOR *
 172 PKCS5_pbe_set(int alg, int iter, const unsigned char *salt, int saltlen)
 173 {
 174         X509_ALGOR *ret;
 175         ret = X509_ALGOR_new();
 176         if (!ret) {
 177                 ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
 178                 return NULL;
 179         }
 180
 181         if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))
 182                 return ret;
 183
 184         X509_ALGOR_free(ret);
 185         return NULL;
 186 }