p12_mutl.c revision 296341
11541Srgrimes/* p12_mutl.c */ 21541Srgrimes/* 31541Srgrimes * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 41541Srgrimes * 1999. 51541Srgrimes */ 61541Srgrimes/* ==================================================================== 71541Srgrimes * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 81541Srgrimes * 91541Srgrimes * Redistribution and use in source and binary forms, with or without 101541Srgrimes * modification, are permitted provided that the following conditions 111541Srgrimes * are met: 121541Srgrimes * 131541Srgrimes * 1. Redistributions of source code must retain the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer. 151541Srgrimes * 161541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 171541Srgrimes * notice, this list of conditions and the following disclaimer in 181541Srgrimes * the documentation and/or other materials provided with the 191541Srgrimes * distribution. 201541Srgrimes * 211541Srgrimes * 3. All advertising materials mentioning features or use of this 221541Srgrimes * software must display the following acknowledgment: 231541Srgrimes * "This product includes software developed by the OpenSSL Project 241541Srgrimes * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 251541Srgrimes * 261541Srgrimes * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 271541Srgrimes * endorse or promote products derived from this software without 281541Srgrimes * prior written permission. For written permission, please contact 291541Srgrimes * licensing@OpenSSL.org. 301541Srgrimes * 311541Srgrimes * 5. Products derived from this software may not be called "OpenSSL" 32116189Sobrien * nor may "OpenSSL" appear in their names without prior written 33116189Sobrien * permission of the OpenSSL Project. 34116189Sobrien * 357109Sphk * 6. Redistributions of any form whatsoever must retain the following 361541Srgrimes * acknowledgment: 37118732Sache * "This product includes software developed by the OpenSSL Project 38110322Sache * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39118732Sache * 4018474Speter * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 4118474Speter * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4218474Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4318474Speter * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4418474Speter * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45110322Sache * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46110322Sache * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4718474Speter * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48110322Sache * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49110322Sache * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 5018474Speter * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 5118474Speter * OF THE POSSIBILITY OF SUCH DAMAGE. 521541Srgrimes * ==================================================================== 531541Srgrimes * 541541Srgrimes * This product includes cryptographic software written by Eric Young 551541Srgrimes * (eay@cryptsoft.com). This product includes software written by Tim 561541Srgrimes * Hudson (tjh@cryptsoft.com). 571541Srgrimes * 581541Srgrimes */ 591541Srgrimes 601541Srgrimes#ifndef OPENSSL_NO_HMAC 611541Srgrimes# include <stdio.h> 621541Srgrimes# include "cryptlib.h" 631541Srgrimes# include <openssl/crypto.h> 641541Srgrimes# include <openssl/hmac.h> 651541Srgrimes# include <openssl/rand.h> 661541Srgrimes# include <openssl/pkcs12.h> 671541Srgrimes 68110281Sache/* Generate a MAC */ 69110281Sacheint PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen, 70110281Sache unsigned char *mac, unsigned int *maclen) 711541Srgrimes{ 721541Srgrimes const EVP_MD *md_type; 731541Srgrimes HMAC_CTX hmac; 74110281Sache unsigned char key[EVP_MAX_MD_SIZE], *salt; 751541Srgrimes int saltlen, iter; 761541Srgrimes int md_size; 771541Srgrimes 781541Srgrimes 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 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 p12->mac->salt->length = saltlen; 177 if (!(p12->mac->salt->data = OPENSSL_malloc(saltlen))) { 178 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 179 return 0; 180 } 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 196