crypto/openssl/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 #ifndef OPENSSL_NO_HMAC
  61 # include <stdio.h>
  62 # include "cryptlib.h"
  63 # include <openssl/crypto.h>
  64 # include <openssl/hmac.h>
  65 # include <openssl/rand.h>
  66 # include <openssl/pkcs12.h>
  67
  68 /* Generate a MAC */
  69 int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
  70                    unsigned char *mac, unsigned int *maclen)
  71 {
  72     const EVP_MD *md_type;
  73     HMAC_CTX hmac;
  74     unsigned char key[EVP_MAX_MD_SIZE], *salt;
  75     int saltlen, iter;
  76     int md_size;
  77
  78     if (!PKCS7_type_is_data(p12->authsafes)) {
  79         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_CONTENT_TYPE_NOT_DATA);
  80         return 0;
  81     }
  82
  83     salt = p12->mac->salt->data;
  84     saltlen = p12->mac->salt->length;
  85     if (!p12->mac->iter)
  86         iter = 1;
  87     else
  88         iter = ASN1_INTEGER_get(p12->mac->iter);
  89     if (!(md_type = EVP_get_digestbyobj(p12->mac->dinfo->algor->algorithm))) {
  90         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
  91         return 0;
  92     }
  93     md_size = EVP_MD_size(md_type);
  94     if (md_size < 0)
  95         return 0;
  96     if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
  97                         md_size, key, md_type)) {
  98         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR);
  99         return 0;
 100     }
 101     HMAC_CTX_init(&hmac);
 102     if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL)
 103         || !HMAC_Update(&hmac, p12->authsafes->d.data->data,
 104                         p12->authsafes->d.data->length)
 105         || !HMAC_Final(&hmac, mac, maclen)) {
 106         HMAC_CTX_cleanup(&hmac);
 107         return 0;
 108     }
 109     HMAC_CTX_cleanup(&hmac);
 110     return 1;
 111 }
 112
 113 /* Verify the mac */
 114 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
 115 {
 116     unsigned char mac[EVP_MAX_MD_SIZE];
 117     unsigned int maclen;
 118     if (p12->mac == NULL) {
 119         PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_ABSENT);
 120         return 0;
 121     }
 122     if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
 123         PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 124         return 0;
 125     }
 126     if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
 127         || CRYPTO_memcmp(mac, p12->mac->dinfo->digest->data, maclen))
 128         return 0;
 129     return 1;
 130 }
 131
 132 /* Set a mac */
 133
 134 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
 135                    unsigned char *salt, int saltlen, int iter,
 136                    const EVP_MD *md_type)
 137 {
 138     unsigned char mac[EVP_MAX_MD_SIZE];
 139     unsigned int maclen;
 140
 141     if (!md_type)
 142         md_type = EVP_sha1();
 143     if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
 144         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR);
 145         return 0;
 146     }
 147     if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
 148         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 149         return 0;
 150     }
 151     if (!(M_ASN1_OCTET_STRING_set(p12->mac->dinfo->digest, mac, maclen))) {
 152         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_STRING_SET_ERROR);
 153         return 0;
 154     }
 155     return 1;
 156 }
 157
 158 /* Set up a mac structure */
 159 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
 160                      const EVP_MD *md_type)
 161 {
 162     if (!(p12->mac = PKCS12_MAC_DATA_new()))
 163         return PKCS12_ERROR;
 164     if (iter > 1) {
 165         if (!(p12->mac->iter = M_ASN1_INTEGER_new())) {
 166             PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 167             return 0;
 168         }
 169         if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
 170             PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 171             return 0;
 172         }
 173     }
 174     if (!saltlen)
 175         saltlen = PKCS12_SALT_LEN;
 176     if ((p12->mac->salt->data = OPENSSL_malloc(saltlen)) == NULL) {
 177         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 178         return 0;
 179     }
 180     p12->mac->salt->length = saltlen;
 181     if (!salt) {
 182         if (RAND_pseudo_bytes(p12->mac->salt->data, saltlen) < 0)
 183             return 0;
 184     } else
 185         memcpy(p12->mac->salt->data, salt, saltlen);
 186     p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
 187     if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) {
 188         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 189         return 0;
 190     }
 191     p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
 192
 193     return 1;
 194 }
 195 #endif