source: branches/samba-3.3.x/source/winbindd/idmap_util.c

Last change on this file was 222, checked in by Herwig Bauernfeind, 16 years ago

Update Samba 3.3 branch to 3.3.2
File size: 8.3 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 ID Mapping
4 Copyright (C) Simo Sorce 2003
5 Copyright (C) Jeremy Allison 2006
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.*/
19
20#include "includes.h"
21#include "winbindd.h"
22#include "winbindd_proto.h"
23
24#undef DBGC_CLASS
25#define DBGC_CLASS DBGC_IDMAP
26
27/*****************************************************************
28 Returns the SID mapped to the given UID.
29 If mapping is not possible returns an error.
30*****************************************************************/
31
32NTSTATUS idmap_uid_to_sid(const char *domname, DOM_SID *sid, uid_t uid)
33{
34 NTSTATUS ret;
35 struct id_map map;
36 bool expired;
37
38 DEBUG(10,("idmap_uid_to_sid: uid = [%lu], domain = '%s'\n",
39 (unsigned long)uid, domname?domname:"NULL"));
40
41 if (winbindd_use_idmap_cache()
42 && idmap_cache_find_uid2sid(uid, sid, &expired)) {
43 DEBUG(10, ("idmap_cache_find_uid2sid found %d%s\n", uid,
44 expired ? " (expired)": ""));
45 if (expired && idmap_is_online()) {
46 DEBUG(10, ("revalidating expired entry\n"));
47 goto backend;
48 }
49 if (is_null_sid(sid)) {
50 DEBUG(10, ("Returning negative cache entry\n"));
51 return NT_STATUS_NONE_MAPPED;
52 }
53 DEBUG(10, ("Returning positive cache entry\n"));
54 return NT_STATUS_OK;
55 }
56
57backend:
58 map.sid = sid;
59 map.xid.type = ID_TYPE_UID;
60 map.xid.id = uid;
61
62 ret = idmap_backends_unixid_to_sid(domname, &map);
63 if ( ! NT_STATUS_IS_OK(ret)) {
64 DEBUG(10, ("error mapping uid [%lu]\n", (unsigned long)uid));
65 return ret;
66 }
67
68 if (map.status != ID_MAPPED) {
69 if (winbindd_use_idmap_cache()) {
70 struct dom_sid null_sid;
71 ZERO_STRUCT(null_sid);
72 idmap_cache_set_sid2uid(&null_sid, uid);
73 }
74 DEBUG(10, ("uid [%lu] not mapped\n", (unsigned long)uid));
75 return NT_STATUS_NONE_MAPPED;
76 }
77
78 if (winbindd_use_idmap_cache()) {
79 idmap_cache_set_sid2uid(sid, uid);
80 }
81
82 return NT_STATUS_OK;
83}
84
85/*****************************************************************
86 Returns SID mapped to the given GID.
87 If mapping is not possible returns an error.
88*****************************************************************/
89
90NTSTATUS idmap_gid_to_sid(const char *domname, DOM_SID *sid, gid_t gid)
91{
92 NTSTATUS ret;
93 struct id_map map;
94 bool expired;
95
96 DEBUG(10,("idmap_gid_to_si: gid = [%lu], domain = '%s'\n",
97 (unsigned long)gid, domname?domname:"NULL"));
98
99 if (winbindd_use_idmap_cache()
100 && idmap_cache_find_gid2sid(gid, sid, &expired)) {
101 DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n", gid,
102 expired ? " (expired)": ""));
103 if (expired && idmap_is_online()) {
104 DEBUG(10, ("revalidating expired entry\n"));
105 goto backend;
106 }
107 if (is_null_sid(sid)) {
108 DEBUG(10, ("Returning negative cache entry\n"));
109 return NT_STATUS_NONE_MAPPED;
110 }
111 DEBUG(10, ("Returning positive cache entry\n"));
112 return NT_STATUS_OK;
113 }
114
115backend:
116 map.sid = sid;
117 map.xid.type = ID_TYPE_GID;
118 map.xid.id = gid;
119
120 ret = idmap_backends_unixid_to_sid(domname, &map);
121 if ( ! NT_STATUS_IS_OK(ret)) {
122 DEBUG(10, ("error mapping gid [%lu]\n", (unsigned long)gid));
123 return ret;
124 }
125
126 if (map.status != ID_MAPPED) {
127 if (winbindd_use_idmap_cache()) {
128 struct dom_sid null_sid;
129 ZERO_STRUCT(null_sid);
130 idmap_cache_set_sid2uid(&null_sid, gid);
131 }
132 DEBUG(10, ("gid [%lu] not mapped\n", (unsigned long)gid));
133 return NT_STATUS_NONE_MAPPED;
134 }
135
136 if (winbindd_use_idmap_cache()) {
137 idmap_cache_set_sid2gid(sid, gid);
138 }
139
140 return NT_STATUS_OK;
141}
142
143/*****************************************************************
144 Returns the UID mapped to the given SID.
145 If mapping is not possible or SID maps to a GID returns an error.
146*****************************************************************/
147
148NTSTATUS idmap_sid_to_uid(const char *dom_name, DOM_SID *sid, uid_t *uid)
149{
150 NTSTATUS ret;
151 struct id_map map;
152 bool expired;
153
154 DEBUG(10,("idmap_sid_to_uid: sid = [%s], domain = '%s'\n",
155 sid_string_dbg(sid), dom_name));
156
157 if (winbindd_use_idmap_cache()
158 && idmap_cache_find_sid2uid(sid, uid, &expired)) {
159 DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n",
160 (int)(*uid), expired ? " (expired)": ""));
161 if (expired && idmap_is_online()) {
162 DEBUG(10, ("revalidating expired entry\n"));
163 goto backend;
164 }
165 if ((*uid) == -1) {
166 DEBUG(10, ("Returning negative cache entry\n"));
167 return NT_STATUS_NONE_MAPPED;
168 }
169 DEBUG(10, ("Returning positive cache entry\n"));
170 return NT_STATUS_OK;
171 }
172
173backend:
174 map.sid = sid;
175 map.xid.type = ID_TYPE_UID;
176
177 ret = idmap_backends_sid_to_unixid(dom_name, &map);
178
179 if (NT_STATUS_IS_OK(ret) && (map.status == ID_MAPPED)) {
180 if (map.xid.type != ID_TYPE_UID) {
181 DEBUG(10, ("sid [%s] not mapped to a uid "
182 "[%u,%u,%u]\n",
183 sid_string_dbg(sid),
184 map.status,
185 map.xid.type,
186 map.xid.id));
187 if (winbindd_use_idmap_cache()) {
188 idmap_cache_set_sid2uid(sid, -1);
189 }
190 return NT_STATUS_NONE_MAPPED;
191 }
192 goto done;
193 }
194
195 if (dom_name[0] != '\0') {
196 /*
197 * We had the task to go to a specific domain which
198 * could not answer our request. Fail.
199 */
200 if (winbindd_use_idmap_cache()) {
201 idmap_cache_set_sid2uid(sid, -1);
202 }
203 return NT_STATUS_NONE_MAPPED;
204 }
205
206 ret = idmap_new_mapping(sid, ID_TYPE_UID, &map.xid);
207
208 if (!NT_STATUS_IS_OK(ret)) {
209 DEBUG(10, ("idmap_new_mapping failed: %s\n",
210 nt_errstr(ret)));
211 if (winbindd_use_idmap_cache()) {
212 idmap_cache_set_sid2uid(sid, -1);
213 }
214 return ret;
215 }
216
217done:
218 *uid = (uid_t)map.xid.id;
219 if (winbindd_use_idmap_cache()) {
220 idmap_cache_set_sid2uid(sid, *uid);
221 }
222 return NT_STATUS_OK;
223}
224
225/*****************************************************************
226 Returns the GID mapped to the given SID.
227 If mapping is not possible or SID maps to a UID returns an error.
228*****************************************************************/
229
230NTSTATUS idmap_sid_to_gid(const char *domname, DOM_SID *sid, gid_t *gid)
231{
232 NTSTATUS ret;
233 struct id_map map;
234 bool expired;
235
236 DEBUG(10,("idmap_sid_to_gid: sid = [%s], domain = '%s'\n",
237 sid_string_dbg(sid), domname));
238
239 if (winbindd_use_idmap_cache()
240 && idmap_cache_find_sid2gid(sid, gid, &expired)) {
241 DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
242 (int)(*gid), expired ? " (expired)": ""));
243 if (expired && idmap_is_online()) {
244 DEBUG(10, ("revalidating expired entry\n"));
245 goto backend;
246 }
247 if ((*gid) == -1) {
248 DEBUG(10, ("Returning negative cache entry\n"));
249 return NT_STATUS_NONE_MAPPED;
250 }
251 DEBUG(10, ("Returning positive cache entry\n"));
252 return NT_STATUS_OK;
253 }
254
255backend:
256 map.sid = sid;
257 map.xid.type = ID_TYPE_GID;
258
259 ret = idmap_backends_sid_to_unixid(domname, &map);
260 if (NT_STATUS_IS_OK(ret) && (map.status == ID_MAPPED)) {
261 if (map.xid.type != ID_TYPE_GID) {
262 DEBUG(10, ("sid [%s] not mapped to a gid "
263 "[%u,%u,%u]\n",
264 sid_string_dbg(sid),
265 map.status,
266 map.xid.type,
267 map.xid.id));
268 if (winbindd_use_idmap_cache()) {
269 idmap_cache_set_sid2gid(sid, -1);
270 }
271 return NT_STATUS_NONE_MAPPED;
272 }
273 goto done;
274 }
275
276 if (domname[0] != '\0') {
277 /*
278 * We had the task to go to a specific domain which
279 * could not answer our request. Fail.
280 */
281 if (winbindd_use_idmap_cache()) {
282 idmap_cache_set_sid2uid(sid, -1);
283 }
284 return NT_STATUS_NONE_MAPPED;
285 }
286
287 ret = idmap_new_mapping(sid, ID_TYPE_GID, &map.xid);
288
289 if (!NT_STATUS_IS_OK(ret)) {
290 DEBUG(10, ("idmap_new_mapping failed: %s\n",
291 nt_errstr(ret)));
292 if (winbindd_use_idmap_cache()) {
293 idmap_cache_set_sid2gid(sid, -1);
294 }
295 return ret;
296 }
297
298done:
299 *gid = map.xid.id;
300 if (winbindd_use_idmap_cache()) {
301 idmap_cache_set_sid2gid(sid, *gid);
302 }
303 return NT_STATUS_OK;
304}
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