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/hmac.h> 63 #include <openssl/rand.h> 64 #include <openssl/pkcs12.h> 65 66 /* Generate a MAC */ 67 int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen, 68 unsigned char *mac, unsigned int *maclen) 69 { 70 const EVP_MD *md_type; 71 HMAC_CTX hmac; 72 unsigned char key[EVP_MAX_MD_SIZE], *salt; 73 int saltlen, iter; 74 int md_size; 75 76 if (!PKCS7_type_is_data(p12->authsafes)) 77 { 78 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_CONTENT_TYPE_NOT_DATA); 79 return 0; 80 } 81 82 salt = p12->mac->salt->data; 83 saltlen = p12->mac->salt->length; 84 if (!p12->mac->iter) iter = 1; 85 else iter = ASN1_INTEGER_get (p12->mac->iter); 86 if(!(md_type = 87 EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) { 88 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM); 89 return 0; 90 } 91 md_size = EVP_MD_size(md_type); 92 if (md_size < 0) 93 return 0; 94 if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter, 95 md_size, key, md_type)) { 96 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR); 97 return 0; 98 } 99 HMAC_CTX_init(&hmac); 100 if (!HMAC_Init_ex(&hmac, key, md_size, md_type, NULL) 101 || !HMAC_Update(&hmac, p12->authsafes->d.data->data, 102 p12->authsafes->d.data->length) 103 || !HMAC_Final(&hmac, mac, maclen)) 104 { 105 HMAC_CTX_cleanup(&hmac); 106 return 0; 107 } 108 HMAC_CTX_cleanup(&hmac); 109 return 1; 110 } 111 112 /* Verify the mac */ 113 int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen) 114 { 115 unsigned char mac[EVP_MAX_MD_SIZE]; 116 unsigned int maclen; 117 if(p12->mac == NULL) { 118 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_ABSENT); 119 return 0; 120 } 121 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) { 122 PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR); 123 return 0; 124 } 125 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length) 126 || memcmp (mac, p12->mac->dinfo->digest->data, maclen)) return 0; 127 return 1; 128 } 129 130 /* Set a mac */ 131 132 int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen, 133 unsigned char *salt, int saltlen, int iter, const EVP_MD *md_type) 134 { 135 unsigned char mac[EVP_MAX_MD_SIZE]; 136 unsigned int maclen; 137 138 if (!md_type) md_type = EVP_sha1(); 139 if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) == 140 PKCS12_ERROR) { 141 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR); 142 return 0; 143 } 144 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) { 145 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR); 146 return 0; 147 } 148 if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) { 149 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR); 150 return 0; 151 } 152 return 1; 153 } 154 155 /* Set up a mac structure */ 156 int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen, 157 const EVP_MD *md_type) 158 { 159 if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR; 160 if (iter > 1) { 161 if(!(p12->mac->iter = M_ASN1_INTEGER_new())) { 162 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 163 return 0; 164 } 165 if (!ASN1_INTEGER_set(p12->mac->iter, iter)) { 166 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 167 return 0; 168 } 169 } 170 if (!saltlen) saltlen = PKCS12_SALT_LEN; 171 p12->mac->salt->length = saltlen; 172 if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) { 173 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 174 return 0; 175 } 176 if (!salt) { 177 if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0) 178 return 0; 179 } 180 else memcpy (p12->mac->salt->data, salt, saltlen); 181 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type)); 182 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) { 183 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 184 return 0; 185 } 186 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL; 187 188 return 1; 189 } 190 #endif 191