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
|
/*
Unix SMB/CIFS implementation.
struct samu local cache for
Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2004.
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 "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_PASSDB
#define LOGIN_CACHE_FILE "login_cache.tdb"
#define SAM_CACHE_FORMAT "dwwd"
static TDB_CONTEXT *cache;
bool login_cache_init(void)
{
char* cache_fname = NULL;
/* skip file open if it's already opened */
if (cache) return True;
cache_fname = cache_path(LOGIN_CACHE_FILE);
if (cache_fname == NULL) {
DEBUG(0, ("Filename allocation failed.\n"));
return False;
}
DEBUG(5, ("Opening cache file at %s\n", cache_fname));
cache = tdb_open_log(cache_fname, 0, TDB_DEFAULT,
O_RDWR|O_CREAT, 0644);
if (!cache)
DEBUG(5, ("Attempt to open %s failed.\n", cache_fname));
TALLOC_FREE(cache_fname);
return (cache ? True : False);
}
bool login_cache_shutdown(void)
{
/* tdb_close routine returns -1 on error */
if (!cache) return False;
DEBUG(5, ("Closing cache file\n"));
return tdb_close(cache) != -1;
}
/* if we can't read the cache, oh well, no need to return anything */
bool login_cache_read(struct samu *sampass, struct login_cache *entry)
{
char *keystr;
TDB_DATA databuf;
uint32_t entry_timestamp = 0, bad_password_time = 0;
if (!login_cache_init()) {
return false;
}
if (pdb_get_nt_username(sampass) == NULL) {
return false;
}
keystr = SMB_STRDUP(pdb_get_nt_username(sampass));
if (!keystr || !keystr[0]) {
SAFE_FREE(keystr);
return false;
}
DEBUG(7, ("Looking up login cache for user %s\n",
keystr));
databuf = tdb_fetch_bystring(cache, keystr);
SAFE_FREE(keystr);
ZERO_STRUCTP(entry);
if (tdb_unpack (databuf.dptr, databuf.dsize, SAM_CACHE_FORMAT,
&entry_timestamp,
&entry->acct_ctrl,
&entry->bad_password_count,
&bad_password_time) == -1) {
DEBUG(7, ("No cache entry found\n"));
SAFE_FREE(databuf.dptr);
return false;
}
/* Deal with possible 64-bit time_t. */
entry->entry_timestamp = (time_t)entry_timestamp;
entry->bad_password_time = (time_t)bad_password_time;
SAFE_FREE(databuf.dptr);
DEBUG(5, ("Found login cache entry: timestamp %12u, flags 0x%x, count %d, time %12u\n",
(unsigned int)entry->entry_timestamp, entry->acct_ctrl,
entry->bad_password_count, (unsigned int)entry->bad_password_time));
return true;
}
bool login_cache_write(const struct samu *sampass,
const struct login_cache *entry)
{
char *keystr;
TDB_DATA databuf;
bool ret;
uint32_t entry_timestamp;
uint32_t bad_password_time = entry->bad_password_time;
if (!login_cache_init())
return False;
if (pdb_get_nt_username(sampass) == NULL) {
return False;
}
keystr = SMB_STRDUP(pdb_get_nt_username(sampass));
if (!keystr || !keystr[0]) {
SAFE_FREE(keystr);
return False;
}
entry_timestamp = (uint32_t)time(NULL);
databuf.dsize =
tdb_pack(NULL, 0, SAM_CACHE_FORMAT,
entry_timestamp,
entry->acct_ctrl,
entry->bad_password_count,
bad_password_time);
databuf.dptr = SMB_MALLOC_ARRAY(uint8, databuf.dsize);
if (!databuf.dptr) {
SAFE_FREE(keystr);
return False;
}
if (tdb_pack(databuf.dptr, databuf.dsize, SAM_CACHE_FORMAT,
entry_timestamp,
entry->acct_ctrl,
entry->bad_password_count,
bad_password_time)
!= databuf.dsize) {
SAFE_FREE(keystr);
SAFE_FREE(databuf.dptr);
return False;
}
ret = tdb_store_bystring(cache, keystr, databuf, 0);
SAFE_FREE(keystr);
SAFE_FREE(databuf.dptr);
return ret == 0;
}
bool login_cache_delentry(const struct samu *sampass)
{
int ret;
char *keystr;
if (!login_cache_init())
return False;
if (pdb_get_nt_username(sampass) == NULL) {
return False;
}
keystr = SMB_STRDUP(pdb_get_nt_username(sampass));
if (!keystr || !keystr[0]) {
SAFE_FREE(keystr);
return False;
}
DEBUG(9, ("About to delete entry for %s\n", keystr));
ret = tdb_delete_bystring(cache, keystr);
DEBUG(9, ("tdb_delete returned %d\n", ret));
SAFE_FREE(keystr);
return ret == 0;
}
|
