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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/*
Unix SMB/CIFS mplementation.
The module that handles the Schema FSMO Role Owner
checkings, it also loads the dsdb_schema.
Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
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 "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "lib/ldb/include/ldb_private.h"
#include "dsdb/samdb/samdb.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "lib/util/dlinklist.h"
static int schema_fsmo_init(struct ldb_module *module)
{
WERROR status;
TALLOC_CTX *mem_ctx;
struct ldb_dn *schema_dn;
struct dsdb_schema *schema;
struct dsdb_schema_fsmo *schema_fsmo;
struct ldb_result *schema_res;
const struct ldb_val *prefix_val;
const struct ldb_val *info_val;
struct ldb_val info_val_default;
struct ldb_result *a_res;
struct ldb_result *c_res;
uint32_t i;
int ret;
static const char *schema_attrs[] = {
"prefixMap",
"schemaInfo",
"fSMORoleOwner",
NULL
};
if (dsdb_get_schema(module->ldb)) {
return ldb_next_init(module);
}
schema_dn = samdb_schema_dn(module->ldb);
if (!schema_dn) {
ldb_reset_err_string(module->ldb);
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"schema_fsmo_init: no schema dn present: (skip schema loading)\n");
return ldb_next_init(module);
}
mem_ctx = talloc_new(module);
if (!mem_ctx) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
schema_fsmo = talloc_zero(mem_ctx, struct dsdb_schema_fsmo);
if (!schema_fsmo) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
module->private_data = schema_fsmo;
schema = talloc_zero(mem_ctx, struct dsdb_schema);
if (!schema) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
/*
* setup the prefix mappings and schema info
*/
ret = ldb_search(module->ldb, schema_dn,
LDB_SCOPE_BASE,
NULL, schema_attrs,
&schema_res);
if (ret == LDB_ERR_NO_SUCH_OBJECT) {
ldb_reset_err_string(module->ldb);
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"schema_fsmo_init: no schema head present: (skip schema loading)\n");
talloc_free(mem_ctx);
return ldb_next_init(module);
} else if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_init: failed to search the schema head: %s",
ldb_errstring(module->ldb));
talloc_free(mem_ctx);
return ret;
}
talloc_steal(mem_ctx, schema_res);
if (schema_res->count == 0) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING,
"schema_fsmo_init: no schema head present: (skip schema loading)\n");
talloc_free(mem_ctx);
return ldb_next_init(module);
} else if (schema_res->count > 1) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_init: [%u] schema heads found on a base search",
schema_res->count);
talloc_free(mem_ctx);
return LDB_ERR_CONSTRAINT_VIOLATION;
}
prefix_val = ldb_msg_find_ldb_val(schema_res->msgs[0], "prefixMap");
if (!prefix_val) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_init: no prefixMap attribute found");
talloc_free(mem_ctx);
return LDB_ERR_CONSTRAINT_VIOLATION;
}
info_val = ldb_msg_find_ldb_val(schema_res->msgs[0], "schemaInfo");
if (!info_val) {
info_val_default = strhex_to_data_blob("FF0000000000000000000000000000000000000000");
if (!info_val_default.data) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
talloc_steal(mem_ctx, info_val_default.data);
info_val = &info_val_default;
}
status = dsdb_load_oid_mappings_ldb(schema, prefix_val, info_val);
if (!W_ERROR_IS_OK(status)) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_init: failed to load oid mappings: %s",
win_errstr(status));
talloc_free(mem_ctx);
return LDB_ERR_CONSTRAINT_VIOLATION;
}
/*
* load the attribute definitions
*/
ret = ldb_search(module->ldb, schema_dn,
LDB_SCOPE_ONELEVEL,
"(objectClass=attributeSchema)", NULL,
&a_res);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_init: failed to search attributeSchema objects: %s",
ldb_errstring(module->ldb));
talloc_free(mem_ctx);
return ret;
}
talloc_steal(mem_ctx, a_res);
for (i=0; i < a_res->count; i++) {
struct dsdb_attribute *sa;
sa = talloc_zero(schema, struct dsdb_attribute);
if (!sa) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
status = dsdb_attribute_from_ldb(schema, a_res->msgs[i], sa, sa);
if (!W_ERROR_IS_OK(status)) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_init: failed to load attriute definition: %s:%s",
ldb_dn_get_linearized(a_res->msgs[i]->dn),
win_errstr(status));
talloc_free(mem_ctx);
return LDB_ERR_CONSTRAINT_VIOLATION;
}
DLIST_ADD_END(schema->attributes, sa, struct dsdb_attribute *);
}
talloc_free(a_res);
/*
* load the objectClass definitions
*/
ret = ldb_search(module->ldb, schema_dn,
LDB_SCOPE_ONELEVEL,
"(objectClass=classSchema)", NULL,
&c_res);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(module->ldb,
"schema_fsmo_init: failed to search classSchema objects: %s",
ldb_errstring(module->ldb));
talloc_free(mem_ctx);
return ret;
}
talloc_steal(mem_ctx, c_res);
for (i=0; i < c_res->count; i++) {
struct dsdb_class *sc;
sc = talloc_zero(schema, struct dsdb_class);
if (!sc) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
status = dsdb_class_from_ldb(schema, c_res->msgs[i], sc, sc);
if (!W_ERROR_IS_OK(status)) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_init: failed to load class definition: %s:%s",
ldb_dn_get_linearized(c_res->msgs[i]->dn),
win_errstr(status));
talloc_free(mem_ctx);
return LDB_ERR_CONSTRAINT_VIOLATION;
}
DLIST_ADD_END(schema->classes, sc, struct dsdb_class *);
}
talloc_free(c_res);
/* dsdb_set_schema() steal schema into the ldb_context */
ret = dsdb_set_schema(module->ldb, schema);
if (ret != LDB_SUCCESS) {
ldb_debug_set(module->ldb, LDB_DEBUG_FATAL,
"schema_fsmo_init: dsdb_set_schema() failed: %d:%s",
ret, ldb_strerror(ret));
talloc_free(mem_ctx);
return ret;
}
schema_fsmo->master_dn = ldb_msg_find_attr_as_dn(module->ldb, schema_fsmo, schema_res->msgs[0], "fSMORoleOwner");
if (ldb_dn_compare(samdb_ntds_settings_dn(module->ldb), schema_fsmo->master_dn) == 0) {
schema_fsmo->we_are_master = true;
} else {
schema_fsmo->we_are_master = false;
}
if (ldb_set_opaque(module->ldb, "dsdb_schema_fsmo", schema_fsmo) != LDB_SUCCESS) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
talloc_steal(module, schema_fsmo);
ldb_debug(module->ldb, LDB_DEBUG_TRACE,
"schema_fsmo_init: we are master: %s\n",
(schema_fsmo->we_are_master?"yes":"no"));
talloc_free(mem_ctx);
return ldb_next_init(module);
}
_PUBLIC_ const struct ldb_module_ops ldb_schema_fsmo_module_ops = {
.name = "schema_fsmo",
.init_context = schema_fsmo_init
};
|
