crypto/pkcs12/p12_mutl.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 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 "internal/cryptlib.h"
  61 # include <openssl/crypto.h>
  62 # include <openssl/hmac.h>
  63 # include <openssl/rand.h>
  64 # include <openssl/pkcs12.h>
  65
  66 # define TK26_MAC_KEY_LEN 32
  67
  68 static int pkcs12_gen_gost_mac_key(const char *pass, int passlen,
  69                                    const unsigned char *salt, int saltlen,
  70                                    int iter, int keylen, unsigned char *key,
  71                                    const EVP_MD *digest)
  72 {
  73     unsigned char out[96];
  74
  75     if (keylen != TK26_MAC_KEY_LEN) {
  76         return 0;
  77     }
  78
  79     if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter,
  80                            digest, sizeof(out), out)) {
  81         return 0;
  82     }
  83     memcpy(key, out + sizeof(out) - TK26_MAC_KEY_LEN, TK26_MAC_KEY_LEN);
  84     OPENSSL_cleanse(out, sizeof(out));
  85     return 1;
  86 }
  87
  88 /* Generate a MAC */
  89 int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
  90                    unsigned char *mac, unsigned int *maclen)
  91 {
  92     const EVP_MD *md_type;
  93     HMAC_CTX *hmac = NULL;
  94     unsigned char key[EVP_MAX_MD_SIZE], *salt;
  95     int saltlen, iter;
  96     int md_size = 0;
  97     int md_type_nid;
  98
  99     if (!PKCS7_type_is_data(p12->authsafes)) {
 100         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_CONTENT_TYPE_NOT_DATA);
 101         return 0;
 102     }
 103
 104     salt = p12->mac->salt->data;
 105     saltlen = p12->mac->salt->length;
 106     if (!p12->mac->iter)
 107         iter = 1;
 108     else
 109         iter = ASN1_INTEGER_get(p12->mac->iter);
 110     if ((md_type = EVP_get_digestbyobj(p12->mac->dinfo->algor->algorithm))
 111             == NULL) {
 112         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
 113         return 0;
 114     }
 115     md_size = EVP_MD_size(md_type);
 116     md_type_nid = EVP_MD_type(md_type);
 117     if (md_size < 0)
 118         return 0;
 119     if ((md_type_nid == NID_id_GostR3411_94
 120          || md_type_nid == NID_id_GostR3411_2012_256
 121          || md_type_nid == NID_id_GostR3411_2012_512)
 122         && !getenv("LEGACY_GOST_PKCS12")) {
 123         md_size = TK26_MAC_KEY_LEN;
 124         if (!pkcs12_gen_gost_mac_key(pass, passlen, salt, saltlen, iter,
 125                                      md_size, key, md_type)) {
 126             PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR);
 127             return 0;
 128         }
 129     } else
 130         if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
 131                             md_size, key, md_type)) {
 132         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR);
 133         return 0;
 134     }
 135     hmac = HMAC_CTX_new();
 136     if (!HMAC_Init_ex(hmac, key, md_size, md_type, NULL)
 137         || !HMAC_Update(hmac, p12->authsafes->d.data->data,
 138                         p12->authsafes->d.data->length)
 139         || !HMAC_Final(hmac, mac, maclen)) {
 140         HMAC_CTX_free(hmac);
 141         return 0;
 142     }
 143     HMAC_CTX_free(hmac);
 144     return 1;
 145 }
 146
 147 /* Verify the mac */
 148 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
 149 {
 150     unsigned char mac[EVP_MAX_MD_SIZE];
 151     unsigned int maclen;
 152     if (p12->mac == NULL) {
 153         PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_ABSENT);
 154         return 0;
 155     }
 156     if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
 157         PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 158         return 0;
 159     }
 160     if ((maclen != (unsigned int)p12->mac->dinfo->digest->length)
 161         || CRYPTO_memcmp(mac, p12->mac->dinfo->digest->data, maclen))
 162         return 0;
 163     return 1;
 164 }
 165
 166 /* Set a mac */
 167
 168 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
 169                    unsigned char *salt, int saltlen, int iter,
 170                    const EVP_MD *md_type)
 171 {
 172     unsigned char mac[EVP_MAX_MD_SIZE];
 173     unsigned int maclen;
 174
 175     if (!md_type)
 176         md_type = EVP_sha1();
 177     if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
 178         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR);
 179         return 0;
 180     }
 181     if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
 182         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 183         return 0;
 184     }
 185     if (!(ASN1_OCTET_STRING_set(p12->mac->dinfo->digest, mac, maclen))) {
 186         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_STRING_SET_ERROR);
 187         return 0;
 188     }
 189     return 1;
 190 }
 191
 192 /* Set up a mac structure */
 193 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
 194                      const EVP_MD *md_type)
 195 {
 196     if ((p12->mac = PKCS12_MAC_DATA_new()) == NULL)
 197         return PKCS12_ERROR;
 198     if (iter > 1) {
 199         if ((p12->mac->iter = ASN1_INTEGER_new()) == NULL) {
 200             PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 201             return 0;
 202         }
 203         if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
 204             PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 205             return 0;
 206         }
 207     }
 208     if (!saltlen)
 209         saltlen = PKCS12_SALT_LEN;
 210     if ((p12->mac->salt->data = OPENSSL_malloc(saltlen)) == NULL) {
 211         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 212         return 0;
 213     }
 214     p12->mac->salt->length = saltlen;
 215     if (!salt) {
 216         if (RAND_bytes(p12->mac->salt->data, saltlen) <= 0)
 217             return 0;
 218     } else
 219         memcpy(p12->mac->salt->data, salt, saltlen);
 220     p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type));
 221     if ((p12->mac->dinfo->algor->parameter = ASN1_TYPE_new()) == NULL) {
 222         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 223         return 0;
 224     }
 225     p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL;
 226
 227     return 1;
 228 }