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 */ 69int 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 */ 114int 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 134int 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 */ 159int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen, 160 const EVP_MD *md_type) 161{ 162 PKCS12_MAC_DATA_free(p12->mac); 163 p12->mac = NULL; 164 165 if ((p12->mac = PKCS12_MAC_DATA_new()) == NULL) 166 return PKCS12_ERROR; 167 if (iter > 1) { 168 if (!(p12->mac->iter = M_ASN1_INTEGER_new())) { 169 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 170 return 0; 171 } 172 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) { 173 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 174 return 0; 175 } 176 } 177 if (!saltlen) 178 saltlen = PKCS12_SALT_LEN; 179 if ((p12->mac->salt->data = OPENSSL_malloc(saltlen)) == NULL) { 180 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 181 return 0; 182 } 183 p12->mac->salt->length = saltlen; 184 if (!salt) { 185 if (RAND_bytes(p12->mac->salt->data, saltlen) <= 0) 186 return 0; 187 } else 188 memcpy(p12->mac->salt->data, salt, saltlen); 189 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type)); 190 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) { 191 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 192 return 0; 193 } 194 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL; 195 196 return 1; 197} 198#endif 199