1 /* $NetBSD: salt-des3.c,v 1.1.1.1 2011/04/13 18:15:37 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * 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 the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "krb5_locl.h" 37 38 #ifdef DES3_OLD_ENCTYPE 39 static krb5_error_code 40 DES3_string_to_key(krb5_context context, 41 krb5_enctype enctype, 42 krb5_data password, 43 krb5_salt salt, 44 krb5_data opaque, 45 krb5_keyblock *key) 46 { 47 char *str; 48 size_t len; 49 unsigned char tmp[24]; 50 DES_cblock keys[3]; 51 krb5_error_code ret; 52 53 len = password.length + salt.saltvalue.length; 54 str = malloc(len); 55 if(len != 0 && str == NULL) { 56 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", "")); 57 return ENOMEM; 58 } 59 memcpy(str, password.data, password.length); 60 memcpy(str + password.length, salt.saltvalue.data, salt.saltvalue.length); 61 { 62 DES_cblock ivec; 63 DES_key_schedule s[3]; 64 int i; 65 66 ret = _krb5_n_fold(str, len, tmp, 24); 67 if (ret) { 68 memset(str, 0, len); 69 free(str); 70 krb5_set_error_message(context, ret, N_("malloc: out of memory", "")); 71 return ret; 72 } 73 74 for(i = 0; i < 3; i++){ 75 memcpy(keys + i, tmp + i * 8, sizeof(keys[i])); 76 DES_set_odd_parity(keys + i); 77 if(DES_is_weak_key(keys + i)) 78 _krb5_xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0"); 79 DES_set_key_unchecked(keys + i, &s[i]); 80 } 81 memset(&ivec, 0, sizeof(ivec)); 82 DES_ede3_cbc_encrypt(tmp, 83 tmp, sizeof(tmp), 84 &s[0], &s[1], &s[2], &ivec, DES_ENCRYPT); 85 memset(s, 0, sizeof(s)); 86 memset(&ivec, 0, sizeof(ivec)); 87 for(i = 0; i < 3; i++){ 88 memcpy(keys + i, tmp + i * 8, sizeof(keys[i])); 89 DES_set_odd_parity(keys + i); 90 if(DES_is_weak_key(keys + i)) 91 _krb5_xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0"); 92 } 93 memset(tmp, 0, sizeof(tmp)); 94 } 95 key->keytype = enctype; 96 krb5_data_copy(&key->keyvalue, keys, sizeof(keys)); 97 memset(keys, 0, sizeof(keys)); 98 memset(str, 0, len); 99 free(str); 100 return 0; 101 } 102 #endif 103 104 static krb5_error_code 105 DES3_string_to_key_derived(krb5_context context, 106 krb5_enctype enctype, 107 krb5_data password, 108 krb5_salt salt, 109 krb5_data opaque, 110 krb5_keyblock *key) 111 { 112 krb5_error_code ret; 113 size_t len = password.length + salt.saltvalue.length; 114 char *s; 115 116 s = malloc(len); 117 if(len != 0 && s == NULL) { 118 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", "")); 119 return ENOMEM; 120 } 121 memcpy(s, password.data, password.length); 122 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length); 123 ret = krb5_string_to_key_derived(context, 124 s, 125 len, 126 enctype, 127 key); 128 memset(s, 0, len); 129 free(s); 130 return ret; 131 } 132 133 134 #ifdef DES3_OLD_ENCTYPE 135 struct salt_type _krb5_des3_salt[] = { 136 { 137 KRB5_PW_SALT, 138 "pw-salt", 139 DES3_string_to_key 140 }, 141 { 0 } 142 }; 143 #endif 144 145 struct salt_type _krb5_des3_salt_derived[] = { 146 { 147 KRB5_PW_SALT, 148 "pw-salt", 149 DES3_string_to_key_derived 150 }, 151 { 0 } 152 }; 153