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 # include "p12_lcl.h"
  66
  67 int PKCS12_mac_present(PKCS12 *p12)
  68 {
  69     return p12->mac ? 1 : 0;
  70 }
  71
  72 void PKCS12_get0_mac(ASN1_OCTET_STRING **pmac, X509_ALGOR **pmacalg,
  73                      ASN1_OCTET_STRING **psalt, ASN1_INTEGER **piter,
  74                      PKCS12 *p12)
  75 {
  76     if (p12->mac) {
  77         X509_SIG_get0(pmacalg, pmac, p12->mac->dinfo);
  78         if (psalt)
  79             *psalt = p12->mac->salt;
  80         if (piter)
  81             *piter = p12->mac->iter;
  82     } else {
  83         if (pmac)
  84             *pmac = NULL;
  85         if (pmacalg)
  86             *pmacalg = NULL;
  87         if (psalt)
  88             *psalt = NULL;
  89         if (piter)
  90             *piter = NULL;
  91     }
  92 }
  93
  94 # define TK26_MAC_KEY_LEN 32
  95
  96 static int pkcs12_gen_gost_mac_key(const char *pass, int passlen,
  97                                    const unsigned char *salt, int saltlen,
  98                                    int iter, int keylen, unsigned char *key,
  99                                    const EVP_MD *digest)
 100 {
 101     unsigned char out[96];
 102
 103     if (keylen != TK26_MAC_KEY_LEN) {
 104         return 0;
 105     }
 106
 107     if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter,
 108                            digest, sizeof(out), out)) {
 109         return 0;
 110     }
 111     memcpy(key, out + sizeof(out) - TK26_MAC_KEY_LEN, TK26_MAC_KEY_LEN);
 112     OPENSSL_cleanse(out, sizeof(out));
 113     return 1;
 114 }
 115
 116 /* Generate a MAC */
 117 int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
 118                    unsigned char *mac, unsigned int *maclen)
 119 {
 120     const EVP_MD *md_type;
 121     HMAC_CTX *hmac = NULL;
 122     unsigned char key[EVP_MAX_MD_SIZE], *salt;
 123     int saltlen, iter;
 124     int md_size = 0;
 125     int md_type_nid;
 126     X509_ALGOR *macalg;
 127     ASN1_OBJECT *macoid;
 128
 129     if (!PKCS7_type_is_data(p12->authsafes)) {
 130         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_CONTENT_TYPE_NOT_DATA);
 131         return 0;
 132     }
 133
 134     salt = p12->mac->salt->data;
 135     saltlen = p12->mac->salt->length;
 136     if (!p12->mac->iter)
 137         iter = 1;
 138     else
 139         iter = ASN1_INTEGER_get(p12->mac->iter);
 140     X509_SIG_get0(&macalg, NULL, p12->mac->dinfo);
 141     X509_ALGOR_get0(&macoid, NULL, NULL, macalg);
 142     if ((md_type = EVP_get_digestbyobj(macoid)) == NULL) {
 143         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM);
 144         return 0;
 145     }
 146     md_size = EVP_MD_size(md_type);
 147     md_type_nid = EVP_MD_type(md_type);
 148     if (md_size < 0)
 149         return 0;
 150     if ((md_type_nid == NID_id_GostR3411_94
 151          || md_type_nid == NID_id_GostR3411_2012_256
 152          || md_type_nid == NID_id_GostR3411_2012_512)
 153         && !getenv("LEGACY_GOST_PKCS12")) {
 154         md_size = TK26_MAC_KEY_LEN;
 155         if (!pkcs12_gen_gost_mac_key(pass, passlen, salt, saltlen, iter,
 156                                      md_size, key, md_type)) {
 157             PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR);
 158             return 0;
 159         }
 160     } else
 161         if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter,
 162                             md_size, key, md_type)) {
 163         PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR);
 164         return 0;
 165     }
 166     hmac = HMAC_CTX_new();
 167     if (!HMAC_Init_ex(hmac, key, md_size, md_type, NULL)
 168         || !HMAC_Update(hmac, p12->authsafes->d.data->data,
 169                         p12->authsafes->d.data->length)
 170         || !HMAC_Final(hmac, mac, maclen)) {
 171         HMAC_CTX_free(hmac);
 172         return 0;
 173     }
 174     HMAC_CTX_free(hmac);
 175     return 1;
 176 }
 177
 178 /* Verify the mac */
 179 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen)
 180 {
 181     unsigned char mac[EVP_MAX_MD_SIZE];
 182     unsigned int maclen;
 183     ASN1_OCTET_STRING *macoct;
 184
 185     if (p12->mac == NULL) {
 186         PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_ABSENT);
 187         return 0;
 188     }
 189     if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
 190         PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 191         return 0;
 192     }
 193     X509_SIG_get0(NULL, &macoct, p12->mac->dinfo);
 194     if ((maclen != (unsigned int)ASN1_STRING_length(macoct))
 195         || CRYPTO_memcmp(mac, ASN1_STRING_data(macoct), maclen))
 196         return 0;
 197     return 1;
 198 }
 199
 200 /* Set a mac */
 201
 202 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
 203                    unsigned char *salt, int saltlen, int iter,
 204                    const EVP_MD *md_type)
 205 {
 206     unsigned char mac[EVP_MAX_MD_SIZE];
 207     unsigned int maclen;
 208     ASN1_OCTET_STRING *macoct;
 209
 210     if (!md_type)
 211         md_type = EVP_sha1();
 212     if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) {
 213         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR);
 214         return 0;
 215     }
 216     if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) {
 217         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_GENERATION_ERROR);
 218         return 0;
 219     }
 220     X509_SIG_get0(NULL, &macoct, p12->mac->dinfo);
 221     if (!ASN1_OCTET_STRING_set(macoct, mac, maclen)) {
 222         PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_STRING_SET_ERROR);
 223         return 0;
 224     }
 225     return 1;
 226 }
 227
 228 /* Set up a mac structure */
 229 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen,
 230                      const EVP_MD *md_type)
 231 {
 232     X509_ALGOR *macalg;
 233
 234     if ((p12->mac = PKCS12_MAC_DATA_new()) == NULL)
 235         return PKCS12_ERROR;
 236     if (iter > 1) {
 237         if ((p12->mac->iter = ASN1_INTEGER_new()) == NULL) {
 238             PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 239             return 0;
 240         }
 241         if (!ASN1_INTEGER_set(p12->mac->iter, iter)) {
 242             PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 243             return 0;
 244         }
 245     }
 246     if (!saltlen)
 247         saltlen = PKCS12_SALT_LEN;
 248     if ((p12->mac->salt->data = OPENSSL_malloc(saltlen)) == NULL) {
 249         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 250         return 0;
 251     }
 252     p12->mac->salt->length = saltlen;
 253     if (!salt) {
 254         if (RAND_bytes(p12->mac->salt->data, saltlen) <= 0)
 255             return 0;
 256     } else
 257         memcpy(p12->mac->salt->data, salt, saltlen);
 258     X509_SIG_get0(&macalg, NULL, p12->mac->dinfo);
 259     if (!X509_ALGOR_set0(macalg, OBJ_nid2obj(EVP_MD_type(md_type)),
 260                          V_ASN1_NULL, NULL)) {
 261         PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE);
 262         return 0;
 263     }
 264
 265     return 1;
 266 }