source: branches/samba-3.5.x/source3/winbindd/idmap_util.c

Last change on this file was 596, checked in by Herwig Bauernfeind, 14 years ago

Samba 3.5: Update trunk to 3.5.8
File size: 9.0 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 true if the request was for a specific domain, or
29 for a sid we are authoritative for - BUILTIN, or our own domain.
30*****************************************************************/
31
32static bool is_specific_domain_request(const char *dom_name, DOM_SID *sid)
33{
34 if (dom_name && dom_name[0] != '\0') {
35 return true;
36 }
37 if (sid_check_is_in_builtin(sid) ||
38 sid_check_is_in_our_domain(sid)) {
39 return true;
40 }
41 return false;
42}
43
44/*****************************************************************
45 Returns the SID mapped to the given UID.
46 If mapping is not possible returns an error.
47*****************************************************************/
48
49NTSTATUS idmap_uid_to_sid(const char *domname, DOM_SID *sid, uid_t uid)
50{
51 NTSTATUS ret;
52 struct id_map map;
53 bool expired;
54
55 DEBUG(10,("idmap_uid_to_sid: uid = [%lu], domain = '%s'\n",
56 (unsigned long)uid, domname?domname:"NULL"));
57
58 if (winbindd_use_idmap_cache()
59 && idmap_cache_find_uid2sid(uid, sid, &expired)) {
60 DEBUG(10, ("idmap_cache_find_uid2sid found %u%s\n",
61 (unsigned int)uid,
62 expired ? " (expired)": ""));
63 if (expired && idmap_is_online()) {
64 DEBUG(10, ("revalidating expired entry\n"));
65 goto backend;
66 }
67 if (is_null_sid(sid)) {
68 DEBUG(10, ("Returning negative cache entry\n"));
69 return NT_STATUS_NONE_MAPPED;
70 }
71 DEBUG(10, ("Returning positive cache entry\n"));
72 return NT_STATUS_OK;
73 }
74
75backend:
76 map.sid = sid;
77 map.xid.type = ID_TYPE_UID;
78 map.xid.id = uid;
79
80 ret = idmap_backends_unixid_to_sid(domname, &map);
81 if ( ! NT_STATUS_IS_OK(ret)) {
82 DEBUG(10, ("error mapping uid [%lu]\n", (unsigned long)uid));
83 return ret;
84 }
85
86 if (map.status != ID_MAPPED) {
87 if (winbindd_use_idmap_cache()) {
88 struct dom_sid null_sid;
89 ZERO_STRUCT(null_sid);
90 idmap_cache_set_sid2uid(&null_sid, uid);
91 }
92 DEBUG(10, ("uid [%lu] not mapped\n", (unsigned long)uid));
93 return NT_STATUS_NONE_MAPPED;
94 }
95
96 if (winbindd_use_idmap_cache()) {
97 idmap_cache_set_sid2uid(sid, uid);
98 }
99
100 return NT_STATUS_OK;
101}
102
103/*****************************************************************
104 Returns SID mapped to the given GID.
105 If mapping is not possible returns an error.
106*****************************************************************/
107
108NTSTATUS idmap_gid_to_sid(const char *domname, DOM_SID *sid, gid_t gid)
109{
110 NTSTATUS ret;
111 struct id_map map;
112 bool expired;
113
114 DEBUG(10,("idmap_gid_to_sid: gid = [%lu], domain = '%s'\n",
115 (unsigned long)gid, domname?domname:"NULL"));
116
117 if (winbindd_use_idmap_cache()
118 && idmap_cache_find_gid2sid(gid, sid, &expired)) {
119 DEBUG(10, ("idmap_cache_find_gid2sid found %u%s\n",
120 (unsigned int)gid,
121 expired ? " (expired)": ""));
122 if (expired && idmap_is_online()) {
123 DEBUG(10, ("revalidating expired entry\n"));
124 goto backend;
125 }
126 if (is_null_sid(sid)) {
127 DEBUG(10, ("Returning negative cache entry\n"));
128 return NT_STATUS_NONE_MAPPED;
129 }
130 DEBUG(10, ("Returning positive cache entry\n"));
131 return NT_STATUS_OK;
132 }
133
134backend:
135 map.sid = sid;
136 map.xid.type = ID_TYPE_GID;
137 map.xid.id = gid;
138
139 ret = idmap_backends_unixid_to_sid(domname, &map);
140 if ( ! NT_STATUS_IS_OK(ret)) {
141 DEBUG(10, ("error mapping gid [%lu]\n", (unsigned long)gid));
142 return ret;
143 }
144
145 if (map.status != ID_MAPPED) {
146 if (winbindd_use_idmap_cache()) {
147 struct dom_sid null_sid;
148 ZERO_STRUCT(null_sid);
149 idmap_cache_set_sid2uid(&null_sid, gid);
150 }
151 DEBUG(10, ("gid [%lu] not mapped\n", (unsigned long)gid));
152 return NT_STATUS_NONE_MAPPED;
153 }
154
155 if (winbindd_use_idmap_cache()) {
156 idmap_cache_set_sid2gid(sid, gid);
157 }
158
159 return NT_STATUS_OK;
160}
161
162/*****************************************************************
163 Returns the UID mapped to the given SID.
164 If mapping is not possible or SID maps to a GID returns an error.
165*****************************************************************/
166
167NTSTATUS idmap_sid_to_uid(const char *dom_name, DOM_SID *sid, uid_t *uid)
168{
169 NTSTATUS ret;
170 struct id_map map;
171 bool expired;
172
173 DEBUG(10,("idmap_sid_to_uid: sid = [%s], domain = '%s'\n",
174 sid_string_dbg(sid), dom_name));
175
176 if (winbindd_use_idmap_cache()
177 && idmap_cache_find_sid2uid(sid, uid, &expired)) {
178 DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n",
179 (int)(*uid), expired ? " (expired)": ""));
180 if (expired && idmap_is_online()) {
181 DEBUG(10, ("revalidating expired entry\n"));
182 goto backend;
183 }
184 if ((*uid) == -1) {
185 DEBUG(10, ("Returning negative cache entry\n"));
186 return NT_STATUS_NONE_MAPPED;
187 }
188 DEBUG(10, ("Returning positive cache entry\n"));
189 return NT_STATUS_OK;
190 }
191
192backend:
193 map.sid = sid;
194 map.xid.type = ID_TYPE_UID;
195
196 ret = idmap_backends_sid_to_unixid(dom_name, &map);
197
198 if (NT_STATUS_IS_OK(ret) && (map.status == ID_MAPPED)) {
199 if (map.xid.type != ID_TYPE_UID) {
200 DEBUG(10, ("sid [%s] not mapped to a uid "
201 "[%u,%u,%u]\n",
202 sid_string_dbg(sid),
203 map.status,
204 map.xid.type,
205 map.xid.id));
206 if (winbindd_use_idmap_cache()) {
207 idmap_cache_set_sid2uid(sid, -1);
208 }
209 return NT_STATUS_NONE_MAPPED;
210 }
211 goto done;
212 }
213
214 if (is_specific_domain_request(dom_name, sid)) {
215 /*
216 * We had the task to go to a specific domain or
217 * a domain for which we are authoritative for and
218 * it could not answer our request. Fail.
219 */
220 if (winbindd_use_idmap_cache()) {
221 idmap_cache_set_sid2uid(sid, -1);
222 }
223 return NT_STATUS_NONE_MAPPED;
224 }
225
226 ret = idmap_new_mapping(sid, ID_TYPE_UID, &map.xid);
227
228 if (!NT_STATUS_IS_OK(ret)) {
229 DEBUG(10, ("idmap_new_mapping failed: %s\n",
230 nt_errstr(ret)));
231 if (winbindd_use_idmap_cache()) {
232 idmap_cache_set_sid2uid(sid, -1);
233 }
234 return ret;
235 }
236
237done:
238 *uid = (uid_t)map.xid.id;
239 if (winbindd_use_idmap_cache()) {
240 idmap_cache_set_sid2uid(sid, *uid);
241 }
242 return NT_STATUS_OK;
243}
244
245/*****************************************************************
246 Returns the GID mapped to the given SID.
247 If mapping is not possible or SID maps to a UID returns an error.
248*****************************************************************/
249
250NTSTATUS idmap_sid_to_gid(const char *domname, DOM_SID *sid, gid_t *gid)
251{
252 NTSTATUS ret;
253 struct id_map map;
254 bool expired;
255
256 DEBUG(10,("idmap_sid_to_gid: sid = [%s], domain = '%s'\n",
257 sid_string_dbg(sid), domname));
258
259 if (winbindd_use_idmap_cache()
260 && idmap_cache_find_sid2gid(sid, gid, &expired)) {
261 DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
262 (int)(*gid), expired ? " (expired)": ""));
263 if (expired && idmap_is_online()) {
264 DEBUG(10, ("revalidating expired entry\n"));
265 goto backend;
266 }
267 if ((*gid) == -1) {
268 DEBUG(10, ("Returning negative cache entry\n"));
269 return NT_STATUS_NONE_MAPPED;
270 }
271 DEBUG(10, ("Returning positive cache entry\n"));
272 return NT_STATUS_OK;
273 }
274
275backend:
276 map.sid = sid;
277 map.xid.type = ID_TYPE_GID;
278
279 ret = idmap_backends_sid_to_unixid(domname, &map);
280 if (NT_STATUS_IS_OK(ret) && (map.status == ID_MAPPED)) {
281 if (map.xid.type != ID_TYPE_GID) {
282 DEBUG(10, ("sid [%s] not mapped to a gid "
283 "[%u,%u,%u]\n",
284 sid_string_dbg(sid),
285 map.status,
286 map.xid.type,
287 map.xid.id));
288 if (winbindd_use_idmap_cache()) {
289 idmap_cache_set_sid2gid(sid, -1);
290 }
291 return NT_STATUS_NONE_MAPPED;
292 }
293 goto done;
294 }
295
296 if (is_specific_domain_request(domname, sid)) {
297 /*
298 * We had the task to go to a specific domain or
299 * a domain for which we are authoritative for and
300 * it could not answer our request. Fail.
301 */
302 if (winbindd_use_idmap_cache()) {
303 idmap_cache_set_sid2uid(sid, -1);
304 }
305 return NT_STATUS_NONE_MAPPED;
306 }
307
308 ret = idmap_new_mapping(sid, ID_TYPE_GID, &map.xid);
309
310 if (!NT_STATUS_IS_OK(ret)) {
311 DEBUG(10, ("idmap_new_mapping failed: %s\n",
312 nt_errstr(ret)));
313 if (winbindd_use_idmap_cache()) {
314 idmap_cache_set_sid2gid(sid, -1);
315 }
316 return ret;
317 }
318
319done:
320 *gid = map.xid.id;
321 if (winbindd_use_idmap_cache()) {
322 idmap_cache_set_sid2gid(sid, *gid);
323 }
324 return NT_STATUS_OK;
325}
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