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 37 static krb5_error_code 38 DES3_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 DES_set_odd_parity(keys + i); 75 if(DES_is_weak_key(keys + i)) 76 _krb5_xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0"); 77 DES_set_key_unchecked(keys + i, &s[i]); 78 } 79 memset(&ivec, 0, sizeof(ivec)); 80 DES_ede3_cbc_encrypt(tmp, 81 tmp, sizeof(tmp), 82 &s[0], &s[1], &s[2], &ivec, DES_ENCRYPT); 83 memset(s, 0, sizeof(s)); 84 memset(&ivec, 0, sizeof(ivec)); 85 for(i = 0; i < 3; i++){ 86 memcpy(keys + i, tmp + i * 8, sizeof(keys[i])); 87 DES_set_odd_parity(keys + i); 88 if(DES_is_weak_key(keys + i)) 89 _krb5_xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0"); 90 } 91 memset(tmp, 0, sizeof(tmp)); 92 } 93 key->keytype = enctype; 94 krb5_data_copy(&key->keyvalue, keys, sizeof(keys)); 95 memset(keys, 0, sizeof(keys)); 96 memset(str, 0, len); 97 free(str); 98 return 0; 99 } 100 #endif 101 102 static krb5_error_code 103 DES3_string_to_key_derived(krb5_context context, 104 krb5_enctype enctype, 105 krb5_data password, 106 krb5_salt salt, 107 krb5_data opaque, 108 krb5_keyblock *key) 109 { 110 krb5_error_code ret; 111 size_t len = password.length + salt.saltvalue.length; 112 char *s; 113 114 s = malloc(len); 115 if(len != 0 && s == NULL) { 116 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", "")); 117 return ENOMEM; 118 } 119 memcpy(s, password.data, password.length); 120 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length); 121 ret = krb5_string_to_key_derived(context, 122 s, 123 len, 124 enctype, 125 key); 126 memset(s, 0, len); 127 free(s); 128 return ret; 129 } 130 131 132 #ifdef DES3_OLD_ENCTYPE 133 struct salt_type _krb5_des3_salt[] = { 134 { 135 KRB5_PW_SALT, 136 "pw-salt", 137 DES3_string_to_key 138 }, 139 { 0 } 140 }; 141 #endif 142 143 struct salt_type _krb5_des3_salt_derived[] = { 144 { 145 KRB5_PW_SALT, 146 "pw-salt", 147 DES3_string_to_key_derived 148 }, 149 { 0 } 150 }; 151