crypto/pkcs12/p12_mutl.c

   1 /* p12_mutl.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 <stdlib.h>
  61 #include <string.h>
  62 #include <err.h>
  63 #include <hmac.h>
  64 #include <rand.h>
  65 #include "pkcs12.h"
  66
  67 /* Generate a MAC */
  68 int PKCS12_gen_mac (p12, pass, passlen, mac, maclen)
  69 PKCS12 *p12;
  70 unsigned char *pass;
  71 int passlen;
  72 unsigned char *mac;
  73 unsigned int *maclen;
  74 {
  75         EVP_MD *md_type;
  76         HMAC_CTX hmac;
  77         unsigned char key[PKCS12_MAC_KEY_LENGTH], *salt;
  78         int saltlen, iter;
  79         salt = p12->mac->salt->data;
  80         saltlen = p12->mac->salt->length;
  81         if (!p12->mac->iter) iter = 1;
  82         else iter = ASN1_INTEGER_get (p12->mac->iter);
  83         if(!(md_type =
  84                  EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) {
  85                 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
  86                 return 0;
  87         }
  88         if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
  89                                  PKCS12_MAC_KEY_LENGTH, key, md_type)) {
  90                 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR);
  91                 return 0;
  92         }
  93         HMAC_Init (&hmac, key, PKCS12_MAC_KEY_LENGTH, md_type);
  94         HMAC_Update (&hmac, p12->authsafes->d.data->data,
  95                                          p12->authsafes->d.data->length);
  96         HMAC_Final (&hmac, mac, maclen);
  97         return 1;
  98 }
  99
 100 /* Verify the mac */
 101 int PKCS12_verify_mac (p12, pass, passlen)
 102 PKCS12 *p12;
 103 unsigned char *pass;
 104 int passlen;
 105 {
 106         unsigned char mac[EVP_MAX_MD_SIZE];
 107         unsigned int maclen;
 108         if(p12->mac == NULL) {
 109                 PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_ABSENT);
 110                 return 0;
 111         }
 112         if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
 113                 PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR);
 114                 return 0;
 115         }
 116         if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
 117         || memcmp (mac, p12->mac->dinfo->digest->data, maclen)) {
 118                 PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_VERIFY_ERROR);
 119                 return 0;
 120         }
 121         return 1;
 122 }
 123
 124 /* Set a mac */
 125
 126 int PKCS12_set_mac (p12, pass, passlen, salt, saltlen, iter, md_type)
 127 PKCS12 *p12;
 128 unsigned char *pass;
 129 int passlen;
 130 unsigned char *salt;
 131 int saltlen;
 132 int iter;
 133 EVP_MD *md_type;
 134 {
 135         unsigned char mac[EVP_MAX_MD_SIZE];
 136         int maclen;
 137         if (!md_type) md_type = EVP_sha1();
 138         if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) ==
 139                                         PKCS12_ERROR) {
 140                 PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR);
 141                 return 0;
 142         }
 143         if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
 144                 PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 145                 return 0;
 146         }
 147         if (!(ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) {
 148                 PKCS12err(PKCS12_F_PKCS12_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR);
 149                                                 return 0;
 150         }
 151         return 1;
 152 }
 153
 154 /* Set up a mac structure */
 155 int PKCS12_setup_mac (p12, iter, salt, saltlen, md_type)
 156 PKCS12 *p12;
 157 int iter;
 158 unsigned char *salt;
 159 int saltlen;
 160 EVP_MD *md_type;
 161 {
 162         if (!(p12->mac = PKCS12_MAC_DATA_new ())) return PKCS12_ERROR;
 163         if (iter > 1) {
 164                 if(!(p12->mac->iter = ASN1_INTEGER_new())) {
 165                         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 166                         return 0;
 167                 }
 168                 ASN1_INTEGER_set (p12->mac->iter, iter);
 169         }
 170         if (!saltlen) saltlen = PKCS12_SALT_LEN;
 171         p12->mac->salt->length = saltlen;
 172         if (!(p12->mac->salt->data = Malloc (saltlen))) {
 173                 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 174                 return 0;
 175         }
 176         if (!salt) RAND_bytes (p12->mac->salt->data, saltlen);
 177         else memcpy (p12->mac->salt->data, salt, saltlen);
 178         M_ASN1_OBJECT_set(p12->mac->dinfo->algor->algorithm,
 179                                                          EVP_MD_type(md_type));
 180         if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
 181                 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 182                 return 0;
 183         }
 184         p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
 185
 186         return 1;
 187 }