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
|
#ifdef SMB_PASSWD
/*
Unix SMB/Netbios implementation.
Version 1.9.
SMB parameters and setup
Copyright (C) Andrew Tridgell 1992-1997
Modified by Jeremy Allison 1995.
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "des.h"
#include "md4.h"
extern int DEBUGLEVEL;
#include "byteorder.h"
void str_to_key(uchar *str,uchar *key)
{
void des_set_odd_parity(des_cblock *);
int i;
key[0] = str[0]>>1;
key[1] = ((str[0]&0x01)<<6) | (str[1]>>2);
key[2] = ((str[1]&0x03)<<5) | (str[2]>>3);
key[3] = ((str[2]&0x07)<<4) | (str[3]>>4);
key[4] = ((str[3]&0x0F)<<3) | (str[4]>>5);
key[5] = ((str[4]&0x1F)<<2) | (str[5]>>6);
key[6] = ((str[5]&0x3F)<<1) | (str[6]>>7);
key[7] = str[6]&0x7F;
for (i=0;i<8;i++) {
key[i] = (key[i]<<1);
}
des_set_odd_parity((des_cblock *)key);
}
void D1(uchar *k, uchar *d, uchar *out)
{
des_key_schedule ks;
des_cblock deskey;
str_to_key(k,(uchar *)deskey);
#ifdef __FreeBSD__
des_set_key(&deskey,ks);
#else /* __FreeBSD__ */
des_set_key((des_cblock *)deskey,ks);
#endif /* __FreeBsd */
des_ecb_encrypt((des_cblock *)d,(des_cblock *)out, ks, DES_DECRYPT);
}
void E1(uchar *k, uchar *d, uchar *out)
{
des_key_schedule ks;
des_cblock deskey;
str_to_key(k,(uchar *)deskey);
#ifdef __FreeBSD__
des_set_key(&deskey,ks);
#else /* __FreeBsd__ */
des_set_key((des_cblock *)deskey,ks);
#endif /* __FreeBsd__ */
des_ecb_encrypt((des_cblock *)d,(des_cblock *)out, ks, DES_ENCRYPT);
}
void E_P16(uchar *p14,uchar *p16)
{
uchar sp7[7];
/* the following constant makes us compatible with other
implementations. Note that publishing this constant does not reduce the
security of the encryption mechanism */
uchar sp8[] = {0xAA,0xD3,0xB4,0x35,0xB5,0x14,0x4,0xEE};
uchar x[8];
memset(sp7,'\0',7);
D1(sp7, sp8, x);
E1(p14, x, p16);
E1(p14+7, x, p16+8);
}
void E_P24(uchar *p21, uchar *c8, uchar *p24)
{
E1(p21, c8, p24);
E1(p21+7, c8, p24+8);
E1(p21+14, c8, p24+16);
}
/*
This implements the X/Open SMB password encryption
It takes a password, a 8 byte "crypt key" and puts 24 bytes of
encrypted password into p24 */
void SMBencrypt(uchar *passwd, uchar *c8, uchar *p24)
{
uchar p14[15], p21[21];
memset(p21,'\0',21);
memset(p14,'\0',14);
StrnCpy((char *)p14,(char *)passwd,14);
strupper((char *)p14);
E_P16(p14, p21);
E_P24(p21, c8, p24);
}
/* Routines for Windows NT MD4 Hash functions. */
static int _my_wcslen(int16 *str)
{
int len = 0;
while(*str++ != 0)
len++;
return len;
}
/*
* Convert a string into an NT UNICODE string.
* Note that regardless of processor type
* this must be in intel (little-endian)
* format.
*/
static int _my_mbstowcs(int16 *dst, uchar *src, int len)
{
int i;
int16 val;
for(i = 0; i < len; i++) {
val = *src;
SSVAL(dst,0,val);
dst++;
src++;
if(val == 0)
break;
}
return i;
}
/*
* Creates the MD4 Hash of the users password in NT UNICODE.
*/
void E_md4hash(uchar *passwd, uchar *p16)
{
int i, len;
int16 wpwd[129];
MDstruct MD;
/* Password cannot be longer than 128 characters */
len = strlen((char *)passwd);
if(len > 128)
len = 128;
/* Password must be converted to NT unicode */
_my_mbstowcs( wpwd, passwd, len);
wpwd[len] = 0; /* Ensure string is null terminated */
/* Calculate length in bytes */
len = _my_wcslen(wpwd) * sizeof(int16);
MDbegin(&MD);
for(i = 0; i + 64 <= len; i += 64)
MDupdate(&MD,wpwd + (i/2), 512);
MDupdate(&MD,wpwd + (i/2),(len-i)*8);
SIVAL(p16,0,MD.buffer[0]);
SIVAL(p16,4,MD.buffer[1]);
SIVAL(p16,8,MD.buffer[2]);
SIVAL(p16,12,MD.buffer[3]);
}
/* Does the NT MD4 hash then des encryption. */
void SMBNTencrypt(uchar *passwd, uchar *c8, uchar *p24)
{
uchar p21[21];
memset(p21,'\0',21);
E_md4hash(passwd, p21);
E_P24(p21, c8, p24);
}
#else
void smbencrypt_dummy(void){}
#endif
|
