p12_mutl.c revision 284295
1/* p12_mutl.c */ 2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3 * project 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#ifndef OPENSSL_NO_HMAC 60#include <stdio.h> 61#include "cryptlib.h" 62#include <openssl/crypto.h> 63#include <openssl/hmac.h> 64#include <openssl/rand.h> 65#include <openssl/pkcs12.h> 66 67/* Generate a MAC */ 68int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen, 69 unsigned char *mac, unsigned int *maclen) 70{ 71 const EVP_MD *md_type; 72 HMAC_CTX hmac; 73 unsigned char key[EVP_MAX_MD_SIZE], *salt; 74 int saltlen, iter; 75 int md_size; 76 77 if (!PKCS7_type_is_data(p12->authsafes)) 78 { 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) iter = 1; 86 else iter = ASN1_INTEGER_get (p12->mac->iter); 87 if(!(md_type = 88 EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) { 89 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM); 90 return 0; 91 } 92 md_size = EVP_MD_size(md_type); 93 if (md_size < 0) 94 return 0; 95 if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter, 96 md_size, key, md_type)) { 97 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR); 98 return 0; 99 } 100 HMAC_CTX_init(&hmac); 101 if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL) 102 || !HMAC_Update(&hmac, p12->authsafes->d.data->data, 103 p12->authsafes->d.data->length) 104 || !HMAC_Final(&hmac, mac, maclen)) 105 { 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, const EVP_MD *md_type) 136{ 137 unsigned char mac[EVP_MAX_MD_SIZE]; 138 unsigned int maclen; 139 140 if (!md_type) md_type = EVP_sha1(); 141 if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) == 142 PKCS12_ERROR) { 143 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR); 144 return 0; 145 } 146 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) { 147 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR); 148 return 0; 149 } 150 if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) { 151 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR); 152 return 0; 153 } 154 return 1; 155} 156 157/* Set up a mac structure */ 158int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen, 159 const EVP_MD *md_type) 160{ 161 if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR; 162 if (iter > 1) { 163 if(!(p12->mac->iter = M_ASN1_INTEGER_new())) { 164 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 165 return 0; 166 } 167 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) { 168 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 169 return 0; 170 } 171 } 172 if (!saltlen) saltlen = PKCS12_SALT_LEN; 173 p12->mac->salt->length = saltlen; 174 if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) { 175 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 176 return 0; 177 } 178 if (!salt) { 179 if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0) 180 return 0; 181 } 182 else memcpy (p12->mac->salt->data, salt, saltlen); 183 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type)); 184 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) { 185 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 186 return 0; 187 } 188 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL; 189 190 return 1; 191} 192#endif 193