1 /* $OpenBSD: p12_mutl.c,v 1.20 2015/07/29 14:58:34 jsing Exp $ */ 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 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 63 #include <openssl/opensslconf.h> 64 65 #ifndef OPENSSL_NO_HMAC 66 67 #include <openssl/err.h> 68 #include <openssl/hmac.h> 69 #include <openssl/pkcs12.h> 70 71 /* Generate a MAC */ 72 int 73 PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen, 74 unsigned char *mac, unsigned int *maclen) 75 { 76 const EVP_MD *md_type; 77 HMAC_CTX hmac; 78 unsigned char key[EVP_MAX_MD_SIZE], *salt; 79 int saltlen, iter; 80 int md_size; 81 82 if (!PKCS7_type_is_data(p12->authsafes)) { 83 PKCS12err(PKCS12_F_PKCS12_GEN_MAC, 84 PKCS12_R_CONTENT_TYPE_NOT_DATA); 85 return 0; 86 } 87 88 salt = p12->mac->salt->data; 89 saltlen = p12->mac->salt->length; 90 if (!p12->mac->iter) 91 iter = 1; 92 else 93 iter = ASN1_INTEGER_get(p12->mac->iter); 94 if (!(md_type = EVP_get_digestbyobj( 95 p12->mac->dinfo->algor->algorithm))) { 96 PKCS12err(PKCS12_F_PKCS12_GEN_MAC, 97 PKCS12_R_UNKNOWN_DIGEST_ALGORITHM); 98 return 0; 99 } 100 md_size = EVP_MD_size(md_type); 101 if (md_size < 0) 102 return 0; 103 if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter, 104 md_size, key, md_type)) { 105 PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR); 106 return 0; 107 } 108 HMAC_CTX_init(&hmac); 109 if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL) || 110 !HMAC_Update(&hmac, p12->authsafes->d.data->data, 111 p12->authsafes->d.data->length) || 112 !HMAC_Final(&hmac, mac, maclen)) { 113 HMAC_CTX_cleanup(&hmac); 114 return 0; 115 } 116 HMAC_CTX_cleanup(&hmac); 117 return 1; 118 } 119 120 /* Verify the mac */ 121 int 122 PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen) 123 { 124 unsigned char mac[EVP_MAX_MD_SIZE]; 125 unsigned int maclen; 126 127 if (p12->mac == NULL) { 128 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_ABSENT); 129 return 0; 130 } 131 if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) { 132 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, 133 PKCS12_R_MAC_GENERATION_ERROR); 134 return 0; 135 } 136 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length) || 137 memcmp(mac, p12->mac->dinfo->digest->data, maclen)) 138 return 0; 139 return 1; 140 } 141 142 /* Set a mac */ 143 144 int 145 PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen, unsigned char *salt, 146 int saltlen, int iter, const EVP_MD *md_type) 147 { 148 unsigned char mac[EVP_MAX_MD_SIZE]; 149 unsigned int maclen; 150 151 if (!md_type) 152 md_type = EVP_sha1(); 153 if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == 154 PKCS12_ERROR) { 155 PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR); 156 return 0; 157 } 158 if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) { 159 PKCS12err(PKCS12_F_PKCS12_SET_MAC, 160 PKCS12_R_MAC_GENERATION_ERROR); 161 return 0; 162 } 163 if (!(ASN1_STRING_set(p12->mac->dinfo->digest, mac, maclen))) { 164 PKCS12err(PKCS12_F_PKCS12_SET_MAC, 165 PKCS12_R_MAC_STRING_SET_ERROR); 166 return 0; 167 } 168 return 1; 169 } 170 171 /* Set up a mac structure */ 172 int 173 PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen, 174 const EVP_MD *md_type) 175 { 176 if (!(p12->mac = PKCS12_MAC_DATA_new())) 177 return PKCS12_ERROR; 178 if (iter > 1) { 179 if (!(p12->mac->iter = ASN1_INTEGER_new())) { 180 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, 181 ERR_R_MALLOC_FAILURE); 182 return 0; 183 } 184 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) { 185 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, 186 ERR_R_MALLOC_FAILURE); 187 return 0; 188 } 189 } 190 if (!saltlen) 191 saltlen = PKCS12_SALT_LEN; 192 if (!(p12->mac->salt->data = malloc(saltlen))) { 193 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 194 return 0; 195 } 196 p12->mac->salt->length = saltlen; 197 if (!salt) 198 arc4random_buf(p12->mac->salt->data, saltlen); 199 else 200 memcpy (p12->mac->salt->data, salt, saltlen); 201 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type)); 202 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) { 203 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 204 return 0; 205 } 206 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL; 207 208 return 1; 209 } 210 #endif 211