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 static krb5_error_code 37 ARCFOUR_string_to_key(krb5_context context, 38 krb5_enctype enctype, 39 krb5_data password, 40 krb5_salt salt, 41 krb5_data opaque, 42 krb5_keyblock *key) 43 { 44 krb5_error_code ret; 45 uint16_t *s = NULL; 46 size_t len = 0, i; 47 EVP_MD_CTX *m; 48 49 m = EVP_MD_CTX_create(); 50 if (m == NULL) { 51 ret = ENOMEM; 52 krb5_set_error_message(context, ret, N_("malloc: out of memory", "")); 53 goto out; 54 } 55 56 EVP_DigestInit_ex(m, EVP_md4(), NULL); 57 58 ret = wind_utf8ucs2_length(password.data, &len); 59 if (ret) { 60 krb5_set_error_message (context, ret, 61 N_("Password not an UCS2 string", "")); 62 goto out; 63 } 64 65 s = malloc (len * sizeof(s[0])); 66 if (len != 0 && s == NULL) { 67 krb5_set_error_message (context, ENOMEM, 68 N_("malloc: out of memory", "")); 69 ret = ENOMEM; 70 goto out; 71 } 72 73 ret = wind_utf8ucs2(password.data, s, &len); 74 if (ret) { 75 krb5_set_error_message (context, ret, 76 N_("Password not an UCS2 string", "")); 77 goto out; 78 } 79 80 /* LE encoding */ 81 for (i = 0; i < len; i++) { 82 unsigned char p; 83 p = (s[i] & 0xff); 84 EVP_DigestUpdate (m, &p, 1); 85 p = (s[i] >> 8) & 0xff; 86 EVP_DigestUpdate (m, &p, 1); 87 } 88 89 key->keytype = enctype; 90 ret = krb5_data_alloc (&key->keyvalue, 16); 91 if (ret) { 92 krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", "")); 93 goto out; 94 } 95 EVP_DigestFinal_ex (m, key->keyvalue.data, NULL); 96 97 out: 98 EVP_MD_CTX_destroy(m); 99 if (s) 100 memset (s, 0, len); 101 free (s); 102 return ret; 103 } 104 105 struct salt_type _krb5_arcfour_salt[] = { 106 { 107 KRB5_PW_SALT, 108 "pw-salt", 109 ARCFOUR_string_to_key 110 }, 111 { 0 } 112 }; 113