1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* Password related utils for FreeIPA
*
* Authors: Simo Sorce <ssorce@redhat.com>
*
* Copyright (C) 2011,2012 Simo Sorce, Red Hat
* see file 'COPYING' for use and warranty information
*
* This program is free software you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdbool.h>
#include <iconv.h>
#include <openssl/des.h>
#include <openssl/md4.h>
#include <dirsrv/slapi-plugin.h>
#include "ipa_pwd.h"
#define KTF_DOS_CHARSET "CP850" /* same default as samba */
#define KTF_UTF8 "UTF-8"
#define KTF_UCS2 "UCS-2LE"
static const uint8_t parity_table[128] = {
1, 2, 4, 7, 8, 11, 13, 14, 16, 19, 21, 22, 25, 26, 28, 31,
32, 35, 37, 38, 41, 42, 44, 47, 49, 50, 52, 55, 56, 59, 61, 62,
64, 67, 69, 70, 73, 74, 76, 79, 81, 82, 84, 87, 88, 91, 93, 94,
97, 98,100,103,104,107,109,110,112,115,117,118,121,122,124,127,
128,131,133,134,137,138,140,143,145,146,148,151,152,155,157,158,
161,162,164,167,168,171,173,174,176,179,181,182,185,186,188,191,
193,194,196,199,200,203,205,206,208,211,213,214,217,218,220,223,
224,227,229,230,233,234,236,239,241,242,244,247,248,251,253,254
};
static void lm_shuffle(uint8_t *out, uint8_t *in)
{
out[0] = parity_table[in[0]>>1];
out[1] = parity_table[((in[0]<<6)|(in[1]>>2)) & 0x7F];
out[2] = parity_table[((in[1]<<5)|(in[2]>>3)) & 0x7F];
out[3] = parity_table[((in[2]<<4)|(in[3]>>4)) & 0x7F];
out[4] = parity_table[((in[3]<<3)|(in[4]>>5)) & 0x7F];
out[5] = parity_table[((in[4]<<2)|(in[5]>>6)) & 0x7F];
out[6] = parity_table[((in[5]<<1)|(in[6]>>7)) & 0x7F];
out[7] = parity_table[in[6] & 0x7F];
}
/* create the lm and nt hashes
newPassword: the clear text utf8 password
upperPasswd: upper case version of clear text utf8 password
do_lm_hash: determine if LM hash is generated
do_nt_hash: determine if NT hash is generated
keys[out]: array with generated hashes
*/
int encode_ntlm_keys(char *newPasswd,
char *upperPasswd,
bool do_lm_hash,
bool do_nt_hash,
struct ntlm_keys *keys)
{
int ret = 0;
/* do lanman first */
if (do_lm_hash) {
iconv_t cd;
size_t cs, il, ol;
char *inc, *outc;
char *asciiPasswd;
DES_key_schedule schedule;
DES_cblock deskey;
DES_cblock magic = "KGS!@#$%";
if (upperPasswd == NULL) {
ret = -1;
goto done;
}
il = strlen(upperPasswd);
/* TODO: must store the dos charset somewhere in the directory */
cd = iconv_open(KTF_DOS_CHARSET, KTF_UTF8);
if (cd == (iconv_t)(-1)) {
ret = -1;
goto done;
}
/* an ascii string can only be smaller than or equal to an utf8 one */
ol = il;
if (ol < 14) ol = 14;
asciiPasswd = calloc(ol+1, 1);
if (!asciiPasswd) {
iconv_close(cd);
ret = -1;
goto done;
}
inc = upperPasswd;
outc = asciiPasswd;
cs = iconv(cd, &inc, &il, &outc, &ol);
if (cs == -1) {
ret = -1;
free(asciiPasswd);
iconv_close(cd);
goto done;
}
/* done with these */
iconv_close(cd);
/* we are interested only in the first 14 ASCII chars for lanman */
if (strlen(asciiPasswd) > 14) {
asciiPasswd[14] = '\0';
}
/* first half */
lm_shuffle(deskey, (uint8_t *)asciiPasswd);
DES_set_key_unchecked(&deskey, &schedule);
DES_ecb_encrypt(&magic, (DES_cblock *)keys->lm,
&schedule, DES_ENCRYPT);
/* second half */
lm_shuffle(deskey, (uint8_t *)&asciiPasswd[7]);
DES_set_key_unchecked(&deskey, &schedule);
DES_ecb_encrypt(&magic, (DES_cblock *)&(keys->lm[8]),
&schedule, DES_ENCRYPT);
/* done with it */
free(asciiPasswd);
} else {
memset(keys->lm, 0, 16);
}
if (do_nt_hash) {
iconv_t cd;
size_t cs, il, ol, sl;
char *inc, *outc;
char *ucs2Passwd;
MD4_CTX md4ctx;
/* TODO: must store the dos charset somewhere in the directory */
cd = iconv_open(KTF_UCS2, KTF_UTF8);
if (cd == (iconv_t)(-1)) {
ret = -1;
goto done;
}
il = strlen(newPasswd);
/* an ucs2 string can be at most double than an utf8 one */
sl = ol = (il+1)*2;
ucs2Passwd = calloc(ol, 1);
if (!ucs2Passwd) {
ret = -1;
iconv_close(cd);
goto done;
}
inc = newPasswd;
outc = ucs2Passwd;
cs = iconv(cd, &inc, &il, &outc, &ol);
if (cs == -1) {
ret = -1;
free(ucs2Passwd);
iconv_close(cd);
goto done;
}
/* done with it */
iconv_close(cd);
/* get the final ucs2 string length */
sl -= ol;
ret = MD4_Init(&md4ctx);
if (ret == 0) {
ret = -1;
free(ucs2Passwd);
goto done;
}
ret = MD4_Update(&md4ctx, ucs2Passwd, sl);
if (ret == 0) {
ret = -1;
free(ucs2Passwd);
goto done;
}
ret = MD4_Final(keys->nt, &md4ctx);
if (ret == 0) {
ret = -1;
free(ucs2Passwd);
goto done;
}
} else {
memset(keys->nt, 0, 16);
}
ret = 0;
done:
return ret;
}
|
