1 /* $NetBSD: salt-arcfour.c,v 1.1.1.2 2014/04/24 12:45:51 pettai Exp $ */
2
3 /*
4 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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
38 static krb5_error_code
ARCFOUR_string_to_key(krb5_context context,krb5_enctype enctype,krb5_data password,krb5_salt salt,krb5_data opaque,krb5_keyblock * key)39 ARCFOUR_string_to_key(krb5_context context,
40 krb5_enctype enctype,
41 krb5_data password,
42 krb5_salt salt,
43 krb5_data opaque,
44 krb5_keyblock *key)
45 {
46 krb5_error_code ret;
47 uint16_t *s = NULL;
48 size_t len = 0, i;
49 EVP_MD_CTX *m;
50
51 m = EVP_MD_CTX_create();
52 if (m == NULL) {
53 ret = ENOMEM;
54 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
55 goto out;
56 }
57
58 EVP_DigestInit_ex(m, EVP_md4(), NULL);
59
60 ret = wind_utf8ucs2_length(password.data, &len);
61 if (ret) {
62 krb5_set_error_message (context, ret,
63 N_("Password not an UCS2 string", ""));
64 goto out;
65 }
66
67 s = malloc (len * sizeof(s[0]));
68 if (len != 0 && s == NULL) {
69 krb5_set_error_message (context, ENOMEM,
70 N_("malloc: out of memory", ""));
71 ret = ENOMEM;
72 goto out;
73 }
74
75 ret = wind_utf8ucs2(password.data, s, &len);
76 if (ret) {
77 krb5_set_error_message (context, ret,
78 N_("Password not an UCS2 string", ""));
79 goto out;
80 }
81
82 /* LE encoding */
83 for (i = 0; i < len; i++) {
84 unsigned char p;
85 p = (s[i] & 0xff);
86 EVP_DigestUpdate (m, &p, 1);
87 p = (s[i] >> 8) & 0xff;
88 EVP_DigestUpdate (m, &p, 1);
89 }
90
91 key->keytype = enctype;
92 ret = krb5_data_alloc (&key->keyvalue, 16);
93 if (ret) {
94 krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
95 goto out;
96 }
97 EVP_DigestFinal_ex (m, key->keyvalue.data, NULL);
98
99 out:
100 EVP_MD_CTX_destroy(m);
101 if (s)
102 memset (s, 0, len);
103 free (s);
104 return ret;
105 }
106
107 struct salt_type _krb5_arcfour_salt[] = {
108 {
109 KRB5_PW_SALT,
110 "pw-salt",
111 ARCFOUR_string_to_key
112 },
113 { 0 }
114 };
115