crypto/pkcs12/p12_mutl.c

   1 /* p12_mutl.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/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[EVP_MAX_MD_SIZE], *salt;
  73     int saltlen, iter;
  74     int md_size;
  75
  76     if (!PKCS7_type_is_data(p12->authsafes)) {
  77         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_CONTENT_TYPE_NOT_DATA);
  78         return 0;
  79     }
  80
  81     salt = p12->mac->salt->data;
  82     saltlen = p12->mac->salt->length;
  83     if (!p12->mac->iter)
  84         iter = 1;
  85     else
  86         iter = ASN1_INTEGER_get(p12->mac->iter);
  87     if (!(md_type = EVP_get_digestbyobj(p12->mac->dinfo->algor->algorithm))) {
  88         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
  89         return 0;
  90     }
  91     md_size = EVP_MD_size(md_type);
  92     if (md_size < 0)
  93         return 0;
  94     if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
  95                         md_size, key, md_type)) {
  96         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR);
  97         return 0;
  98     }
  99     HMAC_CTX_init(&hmac);
 100     if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL)
 101         || !HMAC_Update(&hmac, p12->authsafes->d.data->data,
 102                         p12->authsafes->d.data->length)
 103         || !HMAC_Final(&hmac, mac, maclen)) {
 104         HMAC_CTX_cleanup(&hmac);
 105         return 0;
 106     }
 107     HMAC_CTX_cleanup(&hmac);
 108     return 1;
 109 }
 110
 111 /* Verify the mac */
 112 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
 113 {
 114     unsigned char mac[EVP_MAX_MD_SIZE];
 115     unsigned int maclen;
 116     if (p12->mac == NULL) {
 117         PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_ABSENT);
 118         return 0;
 119     }
 120     if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
 121         PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 122         return 0;
 123     }
 124     if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
 125         || memcmp(mac, p12->mac->dinfo->digest->data, maclen))
 126         return 0;
 127     return 1;
 128 }
 129
 130 /* Set a mac */
 131
 132 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
 133                    unsigned char *salt, int saltlen, int iter,
 134                    const EVP_MD *md_type)
 135 {
 136     unsigned char mac[EVP_MAX_MD_SIZE];
 137     unsigned int maclen;
 138
 139     if (!md_type)
 140         md_type = EVP_sha1();
 141     if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
 142         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR);
 143         return 0;
 144     }
 145     if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
 146         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 147         return 0;
 148     }
 149     if (!(ASN1_OCTET_STRING_set(p12->mac->dinfo->digest, mac, maclen))) {
 150         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_STRING_SET_ERROR);
 151         return 0;
 152     }
 153     return 1;
 154 }
 155
 156 /* Set up a mac structure */
 157 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
 158                      const EVP_MD *md_type)
 159 {
 160     if (!(p12->mac = PKCS12_MAC_DATA_new()))
 161         return PKCS12_ERROR;
 162     if (iter > 1) {
 163         if (!(p12->mac->iter = ASN1_INTEGER_new())) {
 164             PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 165             return 0;
 166         }
 167         if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
 168             PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 169             return 0;
 170         }
 171     }
 172     if (!saltlen)
 173         saltlen = PKCS12_SALT_LEN;
 174     p12->mac->salt->length = saltlen;
 175     if (!(p12->mac->salt->data = OPENSSL_malloc(saltlen))) {
 176         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 177         return 0;
 178     }
 179     if (!salt) {
 180         if (RAND_pseudo_bytes(p12->mac->salt->data, saltlen) < 0)
 181             return 0;
 182     } else
 183         memcpy(p12->mac->salt->data, salt, saltlen);
 184     p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
 185     if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
 186         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 187         return 0;
 188     }
 189     p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
 190
 191     return 1;
 192 }