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
|
/*
Unix SMB/CIFS implementation.
smbpasswd file format routines
Copyright (C) Andrew Tridgell 1992-1998
Modified by Jeremy Allison 1995.
Modified by Gerald (Jerry) Carter 2000-2001
Copyright (C) Tim Potter 2001
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.
*/
/*! \file lib/smbpasswd.c
The smbpasswd file is used to store encrypted passwords in a similar
fashion to the /etc/passwd file. The format is colon separated fields
with one user per line like so:
<username>:<uid>:<lanman hash>:<nt hash>:<acb info>:<last change time>
The username and uid must correspond to an entry in the /etc/passwd
file. The lanman and nt password hashes are 32 hex digits corresponding
to the 16-byte lanman and nt hashes respectively.
The password last change time is stored as a string of the format
LCD-<change time> where the change time is expressed as an
'N' No password
'D' Disabled
'H' Homedir required
'T' Temp account.
'U' User account (normal)
'M' MNS logon user account - what is this ?
'W' Workstation account
'S' Server account
'L' Locked account
'X' No Xpiry on password
'I' Interdomain trust account
*/
#include "includes.h"
/*! Convert 32 hex characters into a 16 byte array. */
BOOL smbpasswd_gethexpwd(char *p, unsigned char *pwd)
{
int i;
unsigned char lonybble, hinybble;
char *hexchars = "0123456789ABCDEF";
char *p1, *p2;
if (!p) return (False);
for (i = 0; i < 32; i += 2)
{
hinybble = toupper(p[i]);
lonybble = toupper(p[i + 1]);
p1 = strchr_m(hexchars, hinybble);
p2 = strchr_m(hexchars, lonybble);
if (!p1 || !p2)
{
return (False);
}
hinybble = PTR_DIFF(p1, hexchars);
lonybble = PTR_DIFF(p2, hexchars);
pwd[i / 2] = (hinybble << 4) | lonybble;
}
return (True);
}
/*! Convert a 16-byte array into 32 hex characters. */
void smbpasswd_sethexpwd(fstring p, unsigned char *pwd, uint16 acb_info)
{
if (pwd != NULL) {
int i;
for (i = 0; i < 16; i++)
slprintf(&p[i*2], 3, "%02X", pwd[i]);
} else {
if (acb_info & ACB_PWNOTREQ)
safe_strcpy(p, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX", 33);
else
safe_strcpy(p, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", 33);
}
}
/*! Decode the account control bits (ACB) info from a string. */
uint16 smbpasswd_decode_acb_info(const char *p)
{
uint16 acb_info = 0;
BOOL finished = False;
/*
* Check if the account type bits have been encoded after the
* NT password (in the form [NDHTUWSLXI]).
*/
if (*p != '[') return 0;
for (p++; *p && !finished; p++)
{
switch (*p) {
case 'N': /* 'N'o password. */
acb_info |= ACB_PWNOTREQ;
break;
case 'D': /* 'D'isabled. */
acb_info |= ACB_DISABLED;
break;
case 'H': /* 'H'omedir required. */
acb_info |= ACB_HOMDIRREQ;
break;
case 'T': /* 'T'emp account. */
acb_info |= ACB_TEMPDUP;
break;
case 'U': /* 'U'ser account (normal). */
acb_info |= ACB_NORMAL;
break;
case 'M': /* 'M'NS logon user account. What is this ? */
acb_info |= ACB_MNS;
break;
case 'W': /* 'W'orkstation account. */
acb_info |= ACB_WSTRUST;
break;
case 'S': /* 'S'erver account. */
acb_info |= ACB_SVRTRUST;
break;
case 'L': /* 'L'ocked account. */
acb_info |= ACB_AUTOLOCK;
break;
case 'X': /* No 'X'piry on password */
acb_info |= ACB_PWNOEXP;
break;
case 'I': /* 'I'nterdomain trust account. */
acb_info |= ACB_DOMTRUST;
break;
case ' ':
break;
case ':':
case '\n':
case '\0':
case ']':
default:
finished = True;
break;
}
}
return acb_info;
}
/*! Encode account control bits (ACBs) into a string. */
char *smbpasswd_encode_acb_info(uint16 acb_info)
{
static fstring acct_str;
size_t i = 0;
acct_str[i++] = '[';
if (acb_info & ACB_PWNOTREQ ) acct_str[i++] = 'N';
if (acb_info & ACB_DISABLED ) acct_str[i++] = 'D';
if (acb_info & ACB_HOMDIRREQ) acct_str[i++] = 'H';
if (acb_info & ACB_TEMPDUP ) acct_str[i++] = 'T';
if (acb_info & ACB_NORMAL ) acct_str[i++] = 'U';
if (acb_info & ACB_MNS ) acct_str[i++] = 'M';
if (acb_info & ACB_WSTRUST ) acct_str[i++] = 'W';
if (acb_info & ACB_SVRTRUST ) acct_str[i++] = 'S';
if (acb_info & ACB_AUTOLOCK ) acct_str[i++] = 'L';
if (acb_info & ACB_PWNOEXP ) acct_str[i++] = 'X';
if (acb_info & ACB_DOMTRUST ) acct_str[i++] = 'I';
for ( ; i < NEW_PW_FORMAT_SPACE_PADDED_LEN - 2 ; i++ )
acct_str[i] = ' ';
i = NEW_PW_FORMAT_SPACE_PADDED_LEN - 2;
acct_str[i++] = ']';
acct_str[i++] = '\0';
return acct_str;
}
|
