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 #ifndef NO_HMAC
  60 #include <stdio.h>
  61 #include "cryptlib.h"
  62 #include <openssl/hmac.h>
  63 #include <openssl/rand.h>
  64 #include <openssl/pkcs12.h>
  65
  66 /* Generate a MAC */
  67 int PKCS12_gen_mac (PKCS12 *p12, const char *pass, int passlen,
  68                     unsigned char *mac, unsigned int *maclen)
  69 {
  70         const EVP_MD *md_type;
  71         HMAC_CTX hmac;
  72         unsigned char key[PKCS12_MAC_KEY_LENGTH], *salt;
  73         int saltlen, iter;
  74         salt = p12->mac->salt->data;
  75         saltlen = p12->mac->salt->length;
  76         if (!p12->mac->iter) iter = 1;
  77         else iter = ASN1_INTEGER_get (p12->mac->iter);
  78         if(!(md_type =
  79                  EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) {
  80                 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
  81                 return 0;
  82         }
  83         if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
  84                                  PKCS12_MAC_KEY_LENGTH, key, md_type)) {
  85                 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR);
  86                 return 0;
  87         }
  88         HMAC_Init (&hmac, key, PKCS12_MAC_KEY_LENGTH, md_type);
  89         HMAC_Update (&hmac, p12->authsafes->d.data->data,
  90                                          p12->authsafes->d.data->length);
  91         HMAC_Final (&hmac, mac, maclen);
  92         return 1;
  93 }
  94
  95 /* Verify the mac */
  96 int PKCS12_verify_mac (PKCS12 *p12, const char *pass, int passlen)
  97 {
  98         unsigned char mac[EVP_MAX_MD_SIZE];
  99         unsigned int maclen;
 100         if(p12->mac == NULL) {
 101                 PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_ABSENT);
 102                 return 0;
 103         }
 104         if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
 105                 PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR);
 106                 return 0;
 107         }
 108         if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
 109         || memcmp (mac, p12->mac->dinfo->digest->data, maclen)) {
 110                 PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_VERIFY_ERROR);
 111                 return 0;
 112         }
 113         return 1;
 114 }
 115
 116 /* Set a mac */
 117
 118 int PKCS12_set_mac (PKCS12 *p12, const char *pass, int passlen,
 119              unsigned char *salt, int saltlen, int iter, EVP_MD *md_type)
 120 {
 121         unsigned char mac[EVP_MAX_MD_SIZE];
 122         unsigned int maclen;
 123
 124         if (!md_type) md_type = EVP_sha1();
 125         if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) ==
 126                                         PKCS12_ERROR) {
 127                 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR);
 128                 return 0;
 129         }
 130         if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) {
 131                 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR);
 132                 return 0;
 133         }
 134         if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) {
 135                 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR);
 136                                                 return 0;
 137         }
 138         return 1;
 139 }
 140
 141 /* Set up a mac structure */
 142 int PKCS12_setup_mac (PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
 143              EVP_MD *md_type)
 144 {
 145         if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR;
 146         if (iter > 1) {
 147                 if(!(p12->mac->iter = M_ASN1_INTEGER_new())) {
 148                         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 149                         return 0;
 150                 }
 151                 ASN1_INTEGER_set(p12->mac->iter, iter);
 152         }
 153         if (!saltlen) saltlen = PKCS12_SALT_LEN;
 154         p12->mac->salt->length = saltlen;
 155         if (!(p12->mac->salt->data = Malloc (saltlen))) {
 156                 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 157                 return 0;
 158         }
 159         if (!salt) RAND_bytes (p12->mac->salt->data, saltlen);
 160         else memcpy (p12->mac->salt->data, salt, saltlen);
 161         p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
 162         if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
 163                 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 164                 return 0;
 165         }
 166         p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
 167
 168         return 1;
 169 }
 170 #endif