source: vendor/3.5.2/source3/winbindd/idmap_util.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 8.0 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 %u%s\n",
44 (unsigned int)uid,
45 expired ? " (expired)": ""));
46 if (expired && idmap_is_online()) {
47 DEBUG(10, ("revalidating expired entry\n"));
48 goto backend;
49 }
50 if (is_null_sid(sid)) {
51 DEBUG(10, ("Returning negative cache entry\n"));
52 return NT_STATUS_NONE_MAPPED;
53 }
54 DEBUG(10, ("Returning positive cache entry\n"));
55 return NT_STATUS_OK;
56 }
57
58backend:
59 map.sid = sid;
60 map.xid.type = ID_TYPE_UID;
61 map.xid.id = uid;
62
63 ret = idmap_backends_unixid_to_sid(domname, &map);
64 if ( ! NT_STATUS_IS_OK(ret)) {
65 DEBUG(10, ("error mapping uid [%lu]\n", (unsigned long)uid));
66 return ret;
67 }
68
69 if (map.status != ID_MAPPED) {
70 if (winbindd_use_idmap_cache()) {
71 struct dom_sid null_sid;
72 ZERO_STRUCT(null_sid);
73 idmap_cache_set_sid2uid(&null_sid, uid);
74 }
75 DEBUG(10, ("uid [%lu] not mapped\n", (unsigned long)uid));
76 return NT_STATUS_NONE_MAPPED;
77 }
78
79 if (winbindd_use_idmap_cache()) {
80 idmap_cache_set_sid2uid(sid, uid);
81 }
82
83 return NT_STATUS_OK;
84}
85
86/*****************************************************************
87 Returns SID mapped to the given GID.
88 If mapping is not possible returns an error.
89*****************************************************************/
90
91NTSTATUS idmap_gid_to_sid(const char *domname, DOM_SID *sid, gid_t gid)
92{
93 NTSTATUS ret;
94 struct id_map map;
95 bool expired;
96
97 DEBUG(10,("idmap_gid_to_sid: gid = [%lu], domain = '%s'\n",
98 (unsigned long)gid, domname?domname:"NULL"));
99
100 if (winbindd_use_idmap_cache()
101 && idmap_cache_find_gid2sid(gid, sid, &expired)) {
102 DEBUG(10, ("idmap_cache_find_gid2sid found %u%s\n",
103 (unsigned int)gid,
104 expired ? " (expired)": ""));
105 if (expired && idmap_is_online()) {
106 DEBUG(10, ("revalidating expired entry\n"));
107 goto backend;
108 }
109 if (is_null_sid(sid)) {
110 DEBUG(10, ("Returning negative cache entry\n"));
111 return NT_STATUS_NONE_MAPPED;
112 }
113 DEBUG(10, ("Returning positive cache entry\n"));
114 return NT_STATUS_OK;
115 }
116
117backend:
118 map.sid = sid;
119 map.xid.type = ID_TYPE_GID;
120 map.xid.id = gid;
121
122 ret = idmap_backends_unixid_to_sid(domname, &map);
123 if ( ! NT_STATUS_IS_OK(ret)) {
124 DEBUG(10, ("error mapping gid [%lu]\n", (unsigned long)gid));
125 return ret;
126 }
127
128 if (map.status != ID_MAPPED) {
129 if (winbindd_use_idmap_cache()) {
130 struct dom_sid null_sid;
131 ZERO_STRUCT(null_sid);
132 idmap_cache_set_sid2uid(&null_sid, gid);
133 }
134 DEBUG(10, ("gid [%lu] not mapped\n", (unsigned long)gid));
135 return NT_STATUS_NONE_MAPPED;
136 }
137
138 if (winbindd_use_idmap_cache()) {
139 idmap_cache_set_sid2gid(sid, gid);
140 }
141
142 return NT_STATUS_OK;
143}
144
145/*****************************************************************
146 Returns the UID mapped to the given SID.
147 If mapping is not possible or SID maps to a GID returns an error.
148*****************************************************************/
149
150NTSTATUS idmap_sid_to_uid(const char *dom_name, DOM_SID *sid, uid_t *uid)
151{
152 NTSTATUS ret;
153 struct id_map map;
154 bool expired;
155
156 DEBUG(10,("idmap_sid_to_uid: sid = [%s], domain = '%s'\n",
157 sid_string_dbg(sid), dom_name));
158
159 if (winbindd_use_idmap_cache()
160 && idmap_cache_find_sid2uid(sid, uid, &expired)) {
161 DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n",
162 (int)(*uid), expired ? " (expired)": ""));
163 if (expired && idmap_is_online()) {
164 DEBUG(10, ("revalidating expired entry\n"));
165 goto backend;
166 }
167 if ((*uid) == -1) {
168 DEBUG(10, ("Returning negative cache entry\n"));
169 return NT_STATUS_NONE_MAPPED;
170 }
171 DEBUG(10, ("Returning positive cache entry\n"));
172 return NT_STATUS_OK;
173 }
174
175backend:
176 map.sid = sid;
177 map.xid.type = ID_TYPE_UID;
178
179 ret = idmap_backends_sid_to_unixid(dom_name, &map);
180
181 if (NT_STATUS_IS_OK(ret) && (map.status == ID_MAPPED)) {
182 if (map.xid.type != ID_TYPE_UID) {
183 DEBUG(10, ("sid [%s] not mapped to a uid "
184 "[%u,%u,%u]\n",
185 sid_string_dbg(sid),
186 map.status,
187 map.xid.type,
188 map.xid.id));
189 if (winbindd_use_idmap_cache()) {
190 idmap_cache_set_sid2uid(sid, -1);
191 }
192 return NT_STATUS_NONE_MAPPED;
193 }
194 goto done;
195 }
196
197 if (dom_name[0] != '\0') {
198 /*
199 * We had the task to go to a specific domain which
200 * could not answer our request. Fail.
201 */
202 if (winbindd_use_idmap_cache()) {
203 idmap_cache_set_sid2uid(sid, -1);
204 }
205 return NT_STATUS_NONE_MAPPED;
206 }
207
208 ret = idmap_new_mapping(sid, ID_TYPE_UID, &map.xid);
209
210 if (!NT_STATUS_IS_OK(ret)) {
211 DEBUG(10, ("idmap_new_mapping failed: %s\n",
212 nt_errstr(ret)));
213 if (winbindd_use_idmap_cache()) {
214 idmap_cache_set_sid2uid(sid, -1);
215 }
216 return ret;
217 }
218
219done:
220 *uid = (uid_t)map.xid.id;
221 if (winbindd_use_idmap_cache()) {
222 idmap_cache_set_sid2uid(sid, *uid);
223 }
224 return NT_STATUS_OK;
225}
226
227/*****************************************************************
228 Returns the GID mapped to the given SID.
229 If mapping is not possible or SID maps to a UID returns an error.
230*****************************************************************/
231
232NTSTATUS idmap_sid_to_gid(const char *domname, DOM_SID *sid, gid_t *gid)
233{
234 NTSTATUS ret;
235 struct id_map map;
236 bool expired;
237
238 DEBUG(10,("idmap_sid_to_gid: sid = [%s], domain = '%s'\n",
239 sid_string_dbg(sid), domname));
240
241 if (winbindd_use_idmap_cache()
242 && idmap_cache_find_sid2gid(sid, gid, &expired)) {
243 DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
244 (int)(*gid), expired ? " (expired)": ""));
245 if (expired && idmap_is_online()) {
246 DEBUG(10, ("revalidating expired entry\n"));
247 goto backend;
248 }
249 if ((*gid) == -1) {
250 DEBUG(10, ("Returning negative cache entry\n"));
251 return NT_STATUS_NONE_MAPPED;
252 }
253 DEBUG(10, ("Returning positive cache entry\n"));
254 return NT_STATUS_OK;
255 }
256
257backend:
258 map.sid = sid;
259 map.xid.type = ID_TYPE_GID;
260
261 ret = idmap_backends_sid_to_unixid(domname, &map);
262 if (NT_STATUS_IS_OK(ret) && (map.status == ID_MAPPED)) {
263 if (map.xid.type != ID_TYPE_GID) {
264 DEBUG(10, ("sid [%s] not mapped to a gid "
265 "[%u,%u,%u]\n",
266 sid_string_dbg(sid),
267 map.status,
268 map.xid.type,
269 map.xid.id));
270 if (winbindd_use_idmap_cache()) {
271 idmap_cache_set_sid2gid(sid, -1);
272 }
273 return NT_STATUS_NONE_MAPPED;
274 }
275 goto done;
276 }
277
278 if (domname[0] != '\0') {
279 /*
280 * We had the task to go to a specific domain which
281 * could not answer our request. Fail.
282 */
283 if (winbindd_use_idmap_cache()) {
284 idmap_cache_set_sid2uid(sid, -1);
285 }
286 return NT_STATUS_NONE_MAPPED;
287 }
288
289 ret = idmap_new_mapping(sid, ID_TYPE_GID, &map.xid);
290
291 if (!NT_STATUS_IS_OK(ret)) {
292 DEBUG(10, ("idmap_new_mapping failed: %s\n",
293 nt_errstr(ret)));
294 if (winbindd_use_idmap_cache()) {
295 idmap_cache_set_sid2gid(sid, -1);
296 }
297 return ret;
298 }
299
300done:
301 *gid = map.xid.id;
302 if (winbindd_use_idmap_cache()) {
303 idmap_cache_set_sid2gid(sid, *gid);
304 }
305 return NT_STATUS_OK;
306}
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