1 /* $OpenBSD: p12_mutl.c,v 1.27 2021/12/12 21:30:14 tb 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 #include "evp_locl.h" 72 #include "hmac_local.h" 73 #include "x509_lcl.h" 74 75 /* Generate a MAC */ 76 int 77 PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen, 78 unsigned char *mac, unsigned int *maclen) 79 { 80 const EVP_MD *md_type; 81 HMAC_CTX hmac; 82 unsigned char key[EVP_MAX_MD_SIZE], *salt; 83 int saltlen, iter; 84 int md_size; 85 86 if (!PKCS7_type_is_data(p12->authsafes)) { 87 PKCS12error(PKCS12_R_CONTENT_TYPE_NOT_DATA); 88 return 0; 89 } 90 91 salt = p12->mac->salt->data; 92 saltlen = p12->mac->salt->length; 93 if (!p12->mac->iter) 94 iter = 1; 95 else if ((iter = ASN1_INTEGER_get(p12->mac->iter)) <= 0) { 96 PKCS12error(PKCS12_R_DECODE_ERROR); 97 return 0; 98 } 99 if (!(md_type = EVP_get_digestbyobj( 100 p12->mac->dinfo->algor->algorithm))) { 101 PKCS12error(PKCS12_R_UNKNOWN_DIGEST_ALGORITHM); 102 return 0; 103 } 104 md_size = EVP_MD_size(md_type); 105 if (md_size < 0) 106 return 0; 107 if (!PKCS12_key_gen(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter, 108 md_size, key, md_type)) { 109 PKCS12error(PKCS12_R_KEY_GEN_ERROR); 110 return 0; 111 } 112 HMAC_CTX_init(&hmac); 113 if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL) || 114 !HMAC_Update(&hmac, p12->authsafes->d.data->data, 115 p12->authsafes->d.data->length) || 116 !HMAC_Final(&hmac, mac, maclen)) { 117 HMAC_CTX_cleanup(&hmac); 118 return 0; 119 } 120 HMAC_CTX_cleanup(&hmac); 121 return 1; 122 } 123 124 /* Verify the mac */ 125 int 126 PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen) 127 { 128 unsigned char mac[EVP_MAX_MD_SIZE]; 129 unsigned int maclen; 130 131 if (p12->mac == NULL) { 132 PKCS12error(PKCS12_R_MAC_ABSENT); 133 return 0; 134 } 135 if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) { 136 PKCS12error(PKCS12_R_MAC_GENERATION_ERROR); 137 return 0; 138 } 139 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length) || 140 memcmp(mac, p12->mac->dinfo->digest->data, maclen)) 141 return 0; 142 return 1; 143 } 144 145 /* Set a mac */ 146 147 int 148 PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen, unsigned char *salt, 149 int saltlen, int iter, const EVP_MD *md_type) 150 { 151 unsigned char mac[EVP_MAX_MD_SIZE]; 152 unsigned int maclen; 153 154 if (!md_type) 155 md_type = EVP_sha1(); 156 if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == 157 PKCS12_ERROR) { 158 PKCS12error(PKCS12_R_MAC_SETUP_ERROR); 159 return 0; 160 } 161 if (!PKCS12_gen_mac(p12, pass, passlen, mac, &maclen)) { 162 PKCS12error(PKCS12_R_MAC_GENERATION_ERROR); 163 return 0; 164 } 165 if (!(ASN1_STRING_set(p12->mac->dinfo->digest, mac, maclen))) { 166 PKCS12error(PKCS12_R_MAC_STRING_SET_ERROR); 167 return 0; 168 } 169 return 1; 170 } 171 172 /* Set up a mac structure */ 173 int 174 PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen, 175 const EVP_MD *md_type) 176 { 177 if (!(p12->mac = PKCS12_MAC_DATA_new())) 178 return PKCS12_ERROR; 179 if (iter > 1) { 180 if (!(p12->mac->iter = ASN1_INTEGER_new())) { 181 PKCS12error(ERR_R_MALLOC_FAILURE); 182 return 0; 183 } 184 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) { 185 PKCS12error(ERR_R_MALLOC_FAILURE); 186 return 0; 187 } 188 } 189 if (!saltlen) 190 saltlen = PKCS12_SALT_LEN; 191 if (!(p12->mac->salt->data = malloc(saltlen))) { 192 PKCS12error(ERR_R_MALLOC_FAILURE); 193 return 0; 194 } 195 p12->mac->salt->length = saltlen; 196 if (!salt) 197 arc4random_buf(p12->mac->salt->data, saltlen); 198 else 199 memcpy(p12->mac->salt->data, salt, saltlen); 200 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type)); 201 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) { 202 PKCS12error(ERR_R_MALLOC_FAILURE); 203 return 0; 204 } 205 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL; 206 207 return 1; 208 } 209 #endif 210