2 Unix SMB/CIFS implementation.
3 Net_sam_logon info3 helpers
4 Copyright (C) Alexander Bokovoy 2002.
5 Copyright (C) Andrew Bartlett 2002.
6 Copyright (C) Gerald Carter 2003.
7 Copyright (C) Tim Potter 2003.
8 Copyright (C) Guenther Deschner 2008.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "system/filesys.h"
26 #include "librpc/gen_ndr/ndr_krb5pac.h"
27 #include "../libcli/security/security.h"
30 #define NETSAMLOGON_TDB "netsamlogon_cache.tdb"
32 static TDB_CONTEXT *netsamlogon_tdb = NULL;
34 /***********************************************************************
36 ***********************************************************************/
38 bool netsamlogon_cache_init(void)
40 bool first_try = true;
43 struct tdb_context *tdb;
45 if (netsamlogon_tdb) {
49 path = cache_path(NETSAMLOGON_TDB);
54 tdb = tdb_open_log(path, 0, TDB_DEFAULT|TDB_INCOMPATIBLE_HASH,
55 O_RDWR | O_CREAT, 0600);
57 DEBUG(0,("tdb_open_log('%s') - failed\n", path));
61 ret = tdb_check(tdb, NULL, NULL);
64 DEBUG(0,("tdb_check('%s') - failed\n", path));
68 netsamlogon_tdb = tdb;
79 DEBUG(0,("retry after truncate for '%s'\n", path));
80 ret = truncate(path, 0);
82 DBG_ERR("truncate failed: %s\n", strerror(errno));
90 /***********************************************************************
91 Clear cache getpwnam and getgroups entries from the winbindd cache
92 ***********************************************************************/
94 void netsamlogon_clear_cached_user(const struct dom_sid *user_sid)
98 if (!netsamlogon_cache_init()) {
99 DEBUG(0,("netsamlogon_clear_cached_user: cannot open "
105 /* Prepare key as DOMAIN-SID/USER-RID string */
106 sid_to_fstring(keystr, user_sid);
108 DEBUG(10,("netsamlogon_clear_cached_user: SID [%s]\n", keystr));
110 tdb_delete_bystring(netsamlogon_tdb, keystr);
113 /***********************************************************************
114 Store a netr_SamInfo3 structure in a tdb for later user
115 username should be in UTF-8 format
116 ***********************************************************************/
118 bool netsamlogon_cache_store(const char *username, struct netr_SamInfo3 *info3)
123 struct dom_sid user_sid;
124 time_t t = time(NULL);
125 TALLOC_CTX *tmp_ctx = talloc_stackframe();
127 enum ndr_err_code ndr_err;
128 struct netsamlogoncache_entry r;
134 if (!netsamlogon_cache_init()) {
135 DEBUG(0,("netsamlogon_cache_store: cannot open %s for write!\n",
140 sid_compose(&user_sid, info3->base.domain_sid, info3->base.rid);
142 /* Prepare key as DOMAIN-SID/USER-RID string */
143 sid_to_fstring(keystr, &user_sid);
145 DEBUG(10,("netsamlogon_cache_store: SID [%s]\n", keystr));
149 if (info3->base.full_name.string == NULL) {
150 struct netr_SamInfo3 *cached_info3;
151 const char *full_name = NULL;
153 cached_info3 = netsamlogon_cache_get(tmp_ctx, &user_sid);
154 if (cached_info3 != NULL) {
155 full_name = cached_info3->base.full_name.string;
158 if (full_name != NULL) {
159 info3->base.full_name.string = talloc_strdup(info3, full_name);
163 /* only Samba fills in the username, not sure why NT doesn't */
164 /* so we fill it in since winbindd_getpwnam() makes use of it */
166 if (!info3->base.account_name.string) {
167 info3->base.account_name.string = talloc_strdup(info3, username);
173 if (DEBUGLEVEL >= 10) {
174 NDR_PRINT_DEBUG(netsamlogoncache_entry, &r);
177 ndr_err = ndr_push_struct_blob(&blob, tmp_ctx, &r,
178 (ndr_push_flags_fn_t)ndr_push_netsamlogoncache_entry);
179 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
180 DEBUG(0,("netsamlogon_cache_store: failed to push entry to cache\n"));
181 TALLOC_FREE(tmp_ctx);
185 data.dsize = blob.length;
186 data.dptr = blob.data;
188 if (tdb_store_bystring(netsamlogon_tdb, keystr, data, TDB_REPLACE) == 0) {
192 TALLOC_FREE(tmp_ctx);
197 /***********************************************************************
198 Retrieves a netr_SamInfo3 structure from a tdb. Caller must
199 free the user_info struct (malloc()'d memory)
200 ***********************************************************************/
202 struct netr_SamInfo3 *netsamlogon_cache_get(TALLOC_CTX *mem_ctx, const struct dom_sid *user_sid)
204 struct netr_SamInfo3 *info3 = NULL;
207 enum ndr_err_code ndr_err;
209 struct netsamlogoncache_entry r;
211 if (!netsamlogon_cache_init()) {
212 DEBUG(0,("netsamlogon_cache_get: cannot open %s for write!\n",
217 /* Prepare key as DOMAIN-SID/USER-RID string */
218 sid_to_fstring(keystr, user_sid);
219 DEBUG(10,("netsamlogon_cache_get: SID [%s]\n", keystr));
220 data = tdb_fetch_bystring( netsamlogon_tdb, keystr );
226 info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
231 blob = data_blob_const(data.dptr, data.dsize);
233 ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, &r,
234 (ndr_pull_flags_fn_t)ndr_pull_netsamlogoncache_entry);
236 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
237 DEBUG(0,("netsamlogon_cache_get: failed to pull entry from cache\n"));
238 tdb_delete_bystring(netsamlogon_tdb, keystr);
243 if (DEBUGLEVEL >= 10) {
244 NDR_PRINT_DEBUG(netsamlogoncache_entry, &r);
247 info3 = (struct netr_SamInfo3 *)talloc_memdup(mem_ctx, &r.info3,
251 SAFE_FREE(data.dptr);
256 bool netsamlogon_cache_have(const struct dom_sid *user_sid)
258 TALLOC_CTX *mem_ctx = talloc_init("netsamlogon_cache_have");
259 struct netr_SamInfo3 *info3 = NULL;
265 info3 = netsamlogon_cache_get(mem_ctx, user_sid);
267 result = (info3 != NULL);
269 talloc_destroy(mem_ctx);