1/* $NetBSD: salt-aes-sha1.c,v 1.2 2017/01/28 21:31:49 christos Exp $ */ 2 3/* 4 * Copyright (c) 1997 - 2008 Kungliga Tekniska H��gskolan 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 38int _krb5_AES_SHA1_string_to_default_iterator = 4096; 39 40static krb5_error_code 41AES_SHA1_string_to_key(krb5_context context, 42 krb5_enctype enctype, 43 krb5_data password, 44 krb5_salt salt, 45 krb5_data opaque, 46 krb5_keyblock *key) 47{ 48 krb5_error_code ret; 49 uint32_t iter; 50 struct _krb5_encryption_type *et; 51 struct _krb5_key_data kd; 52 53 if (opaque.length == 0) 54 iter = _krb5_AES_SHA1_string_to_default_iterator; 55 else if (opaque.length == 4) { 56 unsigned long v; 57 _krb5_get_int(opaque.data, &v, 4); 58 iter = ((uint32_t)v); 59 } else 60 return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */ 61 62 et = _krb5_find_enctype(enctype); 63 if (et == NULL) 64 return KRB5_PROG_KEYTYPE_NOSUPP; 65 66 kd.schedule = NULL; 67 ALLOC(kd.key, 1); 68 if (kd.key == NULL) 69 return krb5_enomem(context); 70 kd.key->keytype = enctype; 71 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size); 72 if (ret) { 73 krb5_set_error_message (context, ret, N_("malloc: out of memory", "")); 74 return ret; 75 } 76 77 ret = PKCS5_PBKDF2_HMAC(password.data, password.length, 78 salt.saltvalue.data, salt.saltvalue.length, 79 iter, 80 EVP_sha1(), 81 et->keytype->size, kd.key->keyvalue.data); 82 if (ret != 1) { 83 _krb5_free_key_data(context, &kd, et); 84 krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP, 85 "Error calculating s2k"); 86 return KRB5_PROG_KEYTYPE_NOSUPP; 87 } 88 89 ret = _krb5_derive_key(context, et, &kd, "kerberos", strlen("kerberos")); 90 if (ret == 0) 91 ret = krb5_copy_keyblock_contents(context, kd.key, key); 92 _krb5_free_key_data(context, &kd, et); 93 94 return ret; 95} 96 97struct salt_type _krb5_AES_SHA1_salt[] = { 98 { 99 KRB5_PW_SALT, 100 "pw-salt", 101 AES_SHA1_string_to_key 102 }, 103 { 0, NULL, NULL } 104}; 105