1*ebfedea0SLionel Sambuc /* $NetBSD: salt-aes.c,v 1.1.1.1 2011/04/13 18:15:37 elric Exp $ */
2*ebfedea0SLionel Sambuc
3*ebfedea0SLionel Sambuc /*
4*ebfedea0SLionel Sambuc * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
5*ebfedea0SLionel Sambuc * (Royal Institute of Technology, Stockholm, Sweden).
6*ebfedea0SLionel Sambuc * All rights reserved.
7*ebfedea0SLionel Sambuc *
8*ebfedea0SLionel Sambuc * Redistribution and use in source and binary forms, with or without
9*ebfedea0SLionel Sambuc * modification, are permitted provided that the following conditions
10*ebfedea0SLionel Sambuc * are met:
11*ebfedea0SLionel Sambuc *
12*ebfedea0SLionel Sambuc * 1. Redistributions of source code must retain the above copyright
13*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer.
14*ebfedea0SLionel Sambuc *
15*ebfedea0SLionel Sambuc * 2. Redistributions in binary form must reproduce the above copyright
16*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer in the
17*ebfedea0SLionel Sambuc * documentation and/or other materials provided with the distribution.
18*ebfedea0SLionel Sambuc *
19*ebfedea0SLionel Sambuc * 3. Neither the name of the Institute nor the names of its contributors
20*ebfedea0SLionel Sambuc * may be used to endorse or promote products derived from this software
21*ebfedea0SLionel Sambuc * without specific prior written permission.
22*ebfedea0SLionel Sambuc *
23*ebfedea0SLionel Sambuc * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24*ebfedea0SLionel Sambuc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25*ebfedea0SLionel Sambuc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26*ebfedea0SLionel Sambuc * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27*ebfedea0SLionel Sambuc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28*ebfedea0SLionel Sambuc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29*ebfedea0SLionel Sambuc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30*ebfedea0SLionel Sambuc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31*ebfedea0SLionel Sambuc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32*ebfedea0SLionel Sambuc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33*ebfedea0SLionel Sambuc * SUCH DAMAGE.
34*ebfedea0SLionel Sambuc */
35*ebfedea0SLionel Sambuc
36*ebfedea0SLionel Sambuc #include "krb5_locl.h"
37*ebfedea0SLionel Sambuc
38*ebfedea0SLionel Sambuc int _krb5_AES_string_to_default_iterator = 4096;
39*ebfedea0SLionel Sambuc
40*ebfedea0SLionel Sambuc static krb5_error_code
AES_string_to_key(krb5_context context,krb5_enctype enctype,krb5_data password,krb5_salt salt,krb5_data opaque,krb5_keyblock * key)41*ebfedea0SLionel Sambuc AES_string_to_key(krb5_context context,
42*ebfedea0SLionel Sambuc krb5_enctype enctype,
43*ebfedea0SLionel Sambuc krb5_data password,
44*ebfedea0SLionel Sambuc krb5_salt salt,
45*ebfedea0SLionel Sambuc krb5_data opaque,
46*ebfedea0SLionel Sambuc krb5_keyblock *key)
47*ebfedea0SLionel Sambuc {
48*ebfedea0SLionel Sambuc krb5_error_code ret;
49*ebfedea0SLionel Sambuc uint32_t iter;
50*ebfedea0SLionel Sambuc struct _krb5_encryption_type *et;
51*ebfedea0SLionel Sambuc struct _krb5_key_data kd;
52*ebfedea0SLionel Sambuc
53*ebfedea0SLionel Sambuc if (opaque.length == 0)
54*ebfedea0SLionel Sambuc iter = _krb5_AES_string_to_default_iterator;
55*ebfedea0SLionel Sambuc else if (opaque.length == 4) {
56*ebfedea0SLionel Sambuc unsigned long v;
57*ebfedea0SLionel Sambuc _krb5_get_int(opaque.data, &v, 4);
58*ebfedea0SLionel Sambuc iter = ((uint32_t)v);
59*ebfedea0SLionel Sambuc } else
60*ebfedea0SLionel Sambuc return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
61*ebfedea0SLionel Sambuc
62*ebfedea0SLionel Sambuc et = _krb5_find_enctype(enctype);
63*ebfedea0SLionel Sambuc if (et == NULL)
64*ebfedea0SLionel Sambuc return KRB5_PROG_KEYTYPE_NOSUPP;
65*ebfedea0SLionel Sambuc
66*ebfedea0SLionel Sambuc kd.schedule = NULL;
67*ebfedea0SLionel Sambuc ALLOC(kd.key, 1);
68*ebfedea0SLionel Sambuc if(kd.key == NULL) {
69*ebfedea0SLionel Sambuc krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
70*ebfedea0SLionel Sambuc return ENOMEM;
71*ebfedea0SLionel Sambuc }
72*ebfedea0SLionel Sambuc kd.key->keytype = enctype;
73*ebfedea0SLionel Sambuc ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
74*ebfedea0SLionel Sambuc if (ret) {
75*ebfedea0SLionel Sambuc krb5_set_error_message (context, ret, N_("malloc: out of memory", ""));
76*ebfedea0SLionel Sambuc return ret;
77*ebfedea0SLionel Sambuc }
78*ebfedea0SLionel Sambuc
79*ebfedea0SLionel Sambuc ret = PKCS5_PBKDF2_HMAC_SHA1(password.data, password.length,
80*ebfedea0SLionel Sambuc salt.saltvalue.data, salt.saltvalue.length,
81*ebfedea0SLionel Sambuc iter,
82*ebfedea0SLionel Sambuc et->keytype->size, kd.key->keyvalue.data);
83*ebfedea0SLionel Sambuc if (ret != 1) {
84*ebfedea0SLionel Sambuc _krb5_free_key_data(context, &kd, et);
85*ebfedea0SLionel Sambuc krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
86*ebfedea0SLionel Sambuc "Error calculating s2k");
87*ebfedea0SLionel Sambuc return KRB5_PROG_KEYTYPE_NOSUPP;
88*ebfedea0SLionel Sambuc }
89*ebfedea0SLionel Sambuc
90*ebfedea0SLionel Sambuc ret = _krb5_derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
91*ebfedea0SLionel Sambuc if (ret == 0)
92*ebfedea0SLionel Sambuc ret = krb5_copy_keyblock_contents(context, kd.key, key);
93*ebfedea0SLionel Sambuc _krb5_free_key_data(context, &kd, et);
94*ebfedea0SLionel Sambuc
95*ebfedea0SLionel Sambuc return ret;
96*ebfedea0SLionel Sambuc }
97*ebfedea0SLionel Sambuc
98*ebfedea0SLionel Sambuc struct salt_type _krb5_AES_salt[] = {
99*ebfedea0SLionel Sambuc {
100*ebfedea0SLionel Sambuc KRB5_PW_SALT,
101*ebfedea0SLionel Sambuc "pw-salt",
102*ebfedea0SLionel Sambuc AES_string_to_key
103*ebfedea0SLionel Sambuc },
104*ebfedea0SLionel Sambuc { 0 }
105*ebfedea0SLionel Sambuc };
106