1 /* p12_mutl.c */ 2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 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[PKCS12_MAC_KEY_LENGTH], *salt; 73 int saltlen, iter; 74 salt = p12->mac->salt->data; 75 saltlen = p12->mac->salt->length; 76 if (!p12->mac->iter) iter = 1; 77 else iter = ASN1_INTEGER_get (p12->mac->iter); 78 if(!(md_type = 79 EVP_get_digestbyobj (p12->mac->dinfo->algor->algorithm))) { 80 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_UNKNOWN_DIGEST_ALGORITHM); 81 return 0; 82 } 83 if(!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter, 84 PKCS12_MAC_KEY_LENGTH, key, md_type)) { 85 PKCS12err(PKCS12_F_PKCS12_GEN_MAC,PKCS12_R_KEY_GEN_ERROR); 86 return 0; 87 } 88 HMAC_Init (&hmac, key, PKCS12_MAC_KEY_LENGTH, md_type); 89 HMAC_Update (&hmac, p12->authsafes->d.data->data, 90 p12->authsafes->d.data->length); 91 HMAC_Final (&hmac, mac, maclen); 92 return 1; 93 } 94 95 /* Verify the mac */ 96 int PKCS12_verify_mac (PKCS12 *p12, const char *pass, int passlen) 97 { 98 unsigned char mac[EVP_MAX_MD_SIZE]; 99 unsigned int maclen; 100 if(p12->mac == NULL) { 101 PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_ABSENT); 102 return 0; 103 } 104 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) { 105 PKCS12err(PKCS12_F_VERIFY_MAC,PKCS12_R_MAC_GENERATION_ERROR); 106 return 0; 107 } 108 if ((maclen != (unsigned int)p12->mac->dinfo->digest->length) 109 || memcmp (mac, p12->mac->dinfo->digest->data, maclen)) return 0; 110 return 1; 111 } 112 113 /* Set a mac */ 114 115 int PKCS12_set_mac (PKCS12 *p12, const char *pass, int passlen, 116 unsigned char *salt, int saltlen, int iter, EVP_MD *md_type) 117 { 118 unsigned char mac[EVP_MAX_MD_SIZE]; 119 unsigned int maclen; 120 121 if (!md_type) md_type = EVP_sha1(); 122 if (PKCS12_setup_mac (p12, iter, salt, saltlen, md_type) == 123 PKCS12_ERROR) { 124 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_SETUP_ERROR); 125 return 0; 126 } 127 if (!PKCS12_gen_mac (p12, pass, passlen, mac, &maclen)) { 128 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_GENERATION_ERROR); 129 return 0; 130 } 131 if (!(M_ASN1_OCTET_STRING_set (p12->mac->dinfo->digest, mac, maclen))) { 132 PKCS12err(PKCS12_F_PKCS12_SET_MAC,PKCS12_R_MAC_STRING_SET_ERROR); 133 return 0; 134 } 135 return 1; 136 } 137 138 /* Set up a mac structure */ 139 int PKCS12_setup_mac (PKCS12 *p12, int iter, unsigned char *salt, int saltlen, 140 EVP_MD *md_type) 141 { 142 if (!(p12->mac = PKCS12_MAC_DATA_new())) return PKCS12_ERROR; 143 if (iter > 1) { 144 if(!(p12->mac->iter = M_ASN1_INTEGER_new())) { 145 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 146 return 0; 147 } 148 ASN1_INTEGER_set(p12->mac->iter, iter); 149 } 150 if (!saltlen) saltlen = PKCS12_SALT_LEN; 151 p12->mac->salt->length = saltlen; 152 if (!(p12->mac->salt->data = OPENSSL_malloc (saltlen))) { 153 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 154 return 0; 155 } 156 if (!salt) { 157 if (RAND_pseudo_bytes (p12->mac->salt->data, saltlen) < 0) 158 return 0; 159 } 160 else memcpy (p12->mac->salt->data, salt, saltlen); 161 p12->mac->dinfo->algor->algorithm = OBJ_nid2obj(EVP_MD_type(md_type)); 162 if (!(p12->mac->dinfo->algor->parameter = ASN1_TYPE_new())) { 163 PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); 164 return 0; 165 } 166 p12->mac->dinfo->algor->parameter->type = V_ASN1_NULL; 167 168 return 1; 169 } 170 #endif 171