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
|
/*
* Samba Unix/Linux SMB client library
*
* Copyright (C) Gregor Beck 2011
*
* 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"
#include "smbd/globals.h"
#include "smbd/smbd.h"
#include "../libcli/security/dom_sid.h"
#include "idmap_cache.h"
#include "passdb/lookup_sid.h"
#include "auth.h"
#include "messages.h"
#include "lib/id_cache.h"
static bool uid_in_use(const struct user_struct* user, uid_t uid)
{
while (user) {
if (user->session_info && (user->session_info->unix_token->uid == uid)) {
return true;
}
user = user->next;
}
return false;
}
static bool gid_in_use(const struct user_struct* user, gid_t gid)
{
while (user) {
if (user->session_info != NULL) {
int i;
struct security_unix_token *utok = user->session_info->unix_token;
if (utok->gid == gid) {
return true;
}
for(i=0; i<utok->ngroups; i++) {
if (utok->groups[i] == gid) {
return true;
}
}
}
user = user->next;
}
return false;
}
static bool sid_in_use(const struct user_struct* user, const struct dom_sid* psid)
{
uid_t uid;
gid_t gid;
if (sid_to_gid(psid, &gid)) {
return gid_in_use(user, gid);
} else if (sid_to_uid(psid, &uid)) {
return uid_in_use(user, uid);
}
return false;
}
static bool id_in_use(const struct user_struct* user,
const struct id_cache_ref* id)
{
switch(id->type) {
case UID:
return uid_in_use(user, id->id.uid);
case GID:
return gid_in_use(user, id->id.gid);
case SID:
return sid_in_use(user, &id->id.sid);
default:
break;
}
return false;
}
static void id_cache_kill(struct messaging_context *msg_ctx,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB* data)
{
const char *msg = (data && data->data) ? (const char *)data->data : "<NULL>";
struct user_struct *validated_users = smbd_server_conn->smb1.sessions.validated_users;
struct id_cache_ref id;
if (!id_cache_ref_parse(msg, &id)) {
DEBUG(0, ("Invalid ?ID: %s\n", msg));
return;
}
if (id_in_use(validated_users, &id)) {
exit_server_cleanly(msg);
}
}
void id_cache_register_kill_msg(struct messaging_context *ctx)
{
messaging_register(ctx, NULL, ID_CACHE_KILL, id_cache_kill);
}
|
