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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
Unix SMB/CIFS implementation.
ID Mapping
Copyright (C) Simo Sorce 2003
Copyright (C) Jeremy Allison 2006
Copyright (C) Michael Adam 2010
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 "winbindd.h"
#include "winbindd_proto.h"
#include "idmap.h"
#include "idmap_cache.h"
#include "../libcli/security/security.h"
#include "secrets.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP
/*****************************************************************
Returns the SID mapped to the given UID.
If mapping is not possible returns an error.
*****************************************************************/
NTSTATUS idmap_uid_to_sid(const char *domname, struct dom_sid *sid, uid_t uid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("idmap_uid_to_sid: uid = [%lu], domain = '%s'\n",
(unsigned long)uid, domname?domname:"NULL"));
if (winbindd_use_idmap_cache()
&& idmap_cache_find_uid2sid(uid, sid, &expired)) {
DEBUG(10, ("idmap_cache_find_uid2sid found %u%s\n",
(unsigned int)uid,
expired ? " (expired)": ""));
if (expired && idmap_is_online()) {
DEBUG(10, ("revalidating expired entry\n"));
goto backend;
}
if (is_null_sid(sid)) {
DEBUG(10, ("Returning negative cache entry\n"));
return NT_STATUS_NONE_MAPPED;
}
DEBUG(10, ("Returning positive cache entry\n"));
return NT_STATUS_OK;
}
backend:
ZERO_STRUCT(map);
map.sid = sid;
map.xid.type = ID_TYPE_UID;
map.xid.id = uid;
ret = idmap_backends_unixid_to_sid(domname, &map);
if ( ! NT_STATUS_IS_OK(ret)) {
DEBUG(10, ("error mapping uid [%lu]\n", (unsigned long)uid));
return ret;
}
if (map.status != ID_MAPPED) {
if (winbindd_use_idmap_cache()) {
struct dom_sid null_sid;
struct unixid id;
id.type = ID_TYPE_UID;
id.id = uid;
ZERO_STRUCT(null_sid);
idmap_cache_set_sid2unixid(&null_sid, &id);
}
DEBUG(10, ("uid [%lu] not mapped\n", (unsigned long)uid));
return NT_STATUS_NONE_MAPPED;
}
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2unixid(sid, &map.xid);
}
return NT_STATUS_OK;
}
/*****************************************************************
Returns SID mapped to the given GID.
If mapping is not possible returns an error.
*****************************************************************/
NTSTATUS idmap_gid_to_sid(const char *domname, struct dom_sid *sid, gid_t gid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("idmap_gid_to_sid: gid = [%lu], domain = '%s'\n",
(unsigned long)gid, domname?domname:"NULL"));
if (winbindd_use_idmap_cache()
&& idmap_cache_find_gid2sid(gid, sid, &expired)) {
DEBUG(10, ("idmap_cache_find_gid2sid found %u%s\n",
(unsigned int)gid,
expired ? " (expired)": ""));
if (expired && idmap_is_online()) {
DEBUG(10, ("revalidating expired entry\n"));
goto backend;
}
if (is_null_sid(sid)) {
DEBUG(10, ("Returning negative cache entry\n"));
return NT_STATUS_NONE_MAPPED;
}
DEBUG(10, ("Returning positive cache entry\n"));
return NT_STATUS_OK;
}
backend:
ZERO_STRUCT(map);
map.sid = sid;
map.xid.type = ID_TYPE_GID;
map.xid.id = gid;
ret = idmap_backends_unixid_to_sid(domname, &map);
if ( ! NT_STATUS_IS_OK(ret)) {
DEBUG(10, ("error mapping gid [%lu]\n", (unsigned long)gid));
return ret;
}
if (map.status != ID_MAPPED) {
if (winbindd_use_idmap_cache()) {
struct dom_sid null_sid;
struct unixid id;
id.type = ID_TYPE_GID;
id.id = gid;
ZERO_STRUCT(null_sid);
idmap_cache_set_sid2unixid(&null_sid, &id);
}
DEBUG(10, ("gid [%lu] not mapped\n", (unsigned long)gid));
return NT_STATUS_NONE_MAPPED;
}
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2unixid(sid, &map.xid);
}
return NT_STATUS_OK;
}
/**
* check whether a given unix id is inside the filter range of an idmap domain
*/
bool idmap_unix_id_is_in_range(uint32_t id, struct idmap_domain *dom)
{
if (id == 0) {
/* 0 is not an allowed unix id for id mapping */
return false;
}
if ((dom->low_id && (id < dom->low_id)) ||
(dom->high_id && (id > dom->high_id)))
{
return false;
}
return true;
}
/**
* Helper for unixids_to_sids: find entry by id in mapping array,
* search up to IDMAP_AD_MAX_IDS entries
*/
struct id_map *idmap_find_map_by_id(struct id_map **maps, enum id_type type,
uint32_t id)
{
int i;
for (i = 0; i < IDMAP_LDAP_MAX_IDS; i++) {
if (maps[i] == NULL) { /* end of the run */
return NULL;
}
if ((maps[i]->xid.type == type) && (maps[i]->xid.id == id)) {
return maps[i];
}
}
return NULL;
}
/**
* Helper for sids_to_unix_ids: find entry by SID in mapping array,
* search up to IDMAP_AD_MAX_IDS entries
*/
struct id_map *idmap_find_map_by_sid(struct id_map **maps, struct dom_sid *sid)
{
int i;
for (i = 0; i < IDMAP_LDAP_MAX_IDS; i++) {
if (maps[i] == NULL) { /* end of the run */
return NULL;
}
if (dom_sid_equal(maps[i]->sid, sid)) {
return maps[i];
}
}
return NULL;
}
char *idmap_fetch_secret(const char *backend, const char *domain,
const char *identity)
{
char *tmp, *ret;
int r;
r = asprintf(&tmp, "IDMAP_%s_%s", backend, domain);
if (r < 0)
return NULL;
/* make sure the key is case insensitive */
if (!strupper_m(tmp)) {
SAFE_FREE(tmp);
return NULL;
}
ret = secrets_fetch_generic(tmp, identity);
SAFE_FREE(tmp);
return ret;
}
|
