1 /* $NetBSD: salt-des3.c,v 1.4 2023/06/19 21:41:44 christos 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 #ifdef DES3_OLD_ENCTYPE
39 static krb5_error_code
DES3_string_to_key(krb5_context context,krb5_enctype enctype,krb5_data password,krb5_salt salt,krb5_data opaque,krb5_keyblock * key)40 DES3_string_to_key(krb5_context context,
41 krb5_enctype enctype,
42 krb5_data password,
43 krb5_salt salt,
44 krb5_data opaque,
45 krb5_keyblock *key)
46 {
47 char *str;
48 size_t len;
49 unsigned char tmp[24];
50 DES_cblock keys[3];
51 krb5_error_code ret;
52
53 len = password.length + salt.saltvalue.length;
54 str = malloc(len);
55 if (len != 0 && str == NULL)
56 return krb5_enomem(context);
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_s(str, len, 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_xor8(*(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_s(&ivec, sizeof(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(s, sizeof(s), 0, sizeof(s));
84 memset_s(&ivec, sizeof(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_xor8(*(keys + i), (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
90 }
91 memset_s(tmp, sizeof(tmp), 0, sizeof(tmp));
92 }
93 key->keytype = enctype;
94 krb5_data_copy(&key->keyvalue, keys, sizeof(keys));
95 memset_s(keys, sizeof(keys), 0, sizeof(keys));
96 memset_s(str, len, 0, len);
97 free(str);
98 return 0;
99 }
100 #endif
101
102 static krb5_error_code
DES3_string_to_key_derived(krb5_context context,krb5_enctype enctype,krb5_data password,krb5_salt salt,krb5_data opaque,krb5_keyblock * key)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 return krb5_enomem(context);
117 memcpy(s, password.data, password.length);
118 if (salt.saltvalue.length)
119 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
120 ret = krb5_string_to_key_derived(context,
121 s,
122 len,
123 enctype,
124 key);
125 memset_s(s, len, 0, len);
126 free(s);
127 return ret;
128 }
129
130
131 #ifdef DES3_OLD_ENCTYPE
132 struct salt_type _krb5_des3_salt[] = {
133 {
134 KRB5_PW_SALT,
135 "pw-salt",
136 DES3_string_to_key
137 },
138 { 0, NULL, NULL }
139 };
140 #endif
141
142 struct salt_type _krb5_des3_salt_derived[] = {
143 {
144 KRB5_PW_SALT,
145 "pw-salt",
146 DES3_string_to_key_derived
147 },
148 { 0, NULL, NULL }
149 };
150