1/* 2 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include "krb5_locl.h" 35 36#ifdef DES3_OLD_ENCTYPE 37static krb5_error_code 38DES3_string_to_key(krb5_context context, 39 krb5_enctype enctype, 40 krb5_data password, 41 krb5_salt salt, 42 krb5_data opaque, 43 krb5_keyblock *key) 44{ 45 char *str; 46 size_t len; 47 unsigned char tmp[24]; 48 DES_cblock keys[3]; 49 krb5_error_code ret; 50 51 len = password.length + salt.saltvalue.length; 52 str = malloc(len); 53 if(len != 0 && str == NULL) { 54 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", "")); 55 return ENOMEM; 56 } 57 memcpy(str, password.data, password.length); 58 memcpy(str + password.length, salt.saltvalue.data, salt.saltvalue.length); 59 { 60 DES_cblock ivec; 61 DES_key_schedule s[3]; 62 int i; 63 64 ret = _krb5_n_fold(str, len, tmp, 24); 65 if (ret) { 66 memset(str, 0, len); 67 free(str); 68 krb5_set_error_message(context, ret, N_("malloc: out of memory", "")); 69 return ret; 70 } 71 72 for(i = 0; i < 3; i++){ 73 memcpy(keys + i, tmp + i * 8, sizeof(keys[i])); 74 CCDesSetOddParity(keys + i, sizeof(keys[i])); 75 if(CCDesIsWeakKey(keys + i, sizeof(keys[i]))) 76 _krb5_xor((void *)(keys + i), 77 (const unsigned char*)"\0\0\0\0\0\0\0\xf0"); 78 DES_set_key_unchecked(keys + i, &s[i]); 79 } 80 memset(&ivec, 0, sizeof(ivec)); 81 DES_ede3_cbc_encrypt(tmp, 82 tmp, sizeof(tmp), 83 &s[0], &s[1], &s[2], &ivec, DES_ENCRYPT); 84 memset(s, 0, sizeof(s)); 85 memset(&ivec, 0, sizeof(ivec)); 86 for(i = 0; i < 3; i++){ 87 memcpy(keys + i, tmp + i * 8, sizeof(keys[i])); 88 CCDesSetOddParity(keys + i, sizeof(keys[i])); 89 if(CCDesIsWeakKey(keys + i, sizeof(keys[i]))) 90 _krb5_xor((void *)(keys + i), 91 (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 104static krb5_error_code 105DES3_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 135struct 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 145struct 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