summaryrefslogtreecommitdiff
path: root/source4/dsdb/samdb/ldb_modules/samldb.c
blob: 5ed84cc10d3c796feacb1079e2f02e9154aa34af (plain)
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
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
/* 
   SAM ldb module

   Copyright (C) Simo Sorce  2004

   * NOTICE: this module is NOT released under the GNU LGPL license as
   * other ldb code. This module is release under the GNU GPL v2 or
   * later license.

   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/*
 *  Name: ldb
 *
 *  Component: ldb samldb module
 *
 *  Description: add embedded user/group creation functionality
 *
 *  Author: Simo Sorce
 */

#include "includes.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_private.h"
#include "system/time.h"
#include "librpc/gen_ndr/ndr_security.h"

#define SAM_ACCOUNT_NAME_BASE "$000000-000000000000"

static int samldb_search_bytree(struct ldb_module *module, const struct ldb_dn *base,
				enum ldb_scope scope, struct ldb_parse_tree *tree,
				const char * const *attrs, struct ldb_message ***res)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_search\n");
	return ldb_next_search_bytree(module, base, scope, tree, attrs, res);
}

/*
  allocate a new id, attempting to do it atomically
  return 0 on failure, the id on success
*/
static int samldb_allocate_next_rid(struct ldb_context *ldb, TALLOC_CTX *mem_ctx,
				   const struct ldb_dn *dn, uint32_t *id)
{
	const char * const attrs[2] = { "nextRid", NULL };
	struct ldb_message **res = NULL;
	struct ldb_message msg;
	int ret;
	const char *str;
	struct ldb_val vals[2];
	struct ldb_message_element els[2];

	ret = ldb_search(ldb, dn, LDB_SCOPE_BASE, "nextRid=*", attrs, &res);
	if (ret != 1) {
		if (res) talloc_free(res);
		return -1;
	}
	str = ldb_msg_find_string(res[0], "nextRid", NULL);
	if (str == NULL) {
		ldb_debug(ldb, LDB_DEBUG_FATAL, "attribute nextRid not found in %s\n", ldb_dn_linearize(res, dn));
		talloc_free(res);
		return -1;
	}

	*id = strtol(str, NULL, 0);
	if ((*id)+1 == 0) {
		/* out of IDs ! */
		ldb_debug(ldb, LDB_DEBUG_FATAL, "Are we out of valid IDs ?\n");
		talloc_free(res);
		return -1;
	}
	talloc_free(res);

	/* we do a delete and add as a single operation. That prevents
	   a race */
	ZERO_STRUCT(msg);
	msg.dn = ldb_dn_copy(mem_ctx, dn);
	if (!msg.dn) {
		return -1;
	}
	msg.num_elements = 2;
	msg.elements = els;

	els[0].num_values = 1;
	els[0].values = &vals[0];
	els[0].flags = LDB_FLAG_MOD_DELETE;
	els[0].name = talloc_strdup(mem_ctx, "nextRid");
	if (!els[0].name) {
		return -1;
	}

	els[1].num_values = 1;
	els[1].values = &vals[1];
	els[1].flags = LDB_FLAG_MOD_ADD;
	els[1].name = els[0].name;

	vals[0].data = (uint8_t *)talloc_asprintf(mem_ctx, "%u", *id);
	if (!vals[0].data) {
		return -1;
	}
	vals[0].length = strlen((char *)vals[0].data);

	vals[1].data = (uint8_t *)talloc_asprintf(mem_ctx, "%u", (*id)+1);
	if (!vals[1].data) {
		return -1;
	}
	vals[1].length = strlen((char *)vals[1].data);

	ret = ldb_modify(ldb, &msg);
	if (ret != 0) {
		return 1;
	}

	(*id)++;

	return 0;
}

static struct ldb_dn *samldb_search_domain(struct ldb_module *module, TALLOC_CTX *mem_ctx, const struct ldb_dn *dn)
{
	TALLOC_CTX *local_ctx;
	struct ldb_dn *sdn;
	struct ldb_message **res = NULL;
	int ret = 0;

	local_ctx = talloc_named(mem_ctx, 0, "samldb_search_domain memory conext");
	if (local_ctx == NULL) return NULL;

	sdn = ldb_dn_copy(local_ctx, dn);
	do {
		ret = ldb_search(module->ldb, sdn, LDB_SCOPE_BASE, "objectClass=domain", NULL, &res);
		talloc_free(res);

		if (ret == 1)
			break;

	} while ((sdn = ldb_dn_get_parent(local_ctx, sdn)));

	if (ret != 1) {
		talloc_free(local_ctx);
		return NULL;
	}

	talloc_steal(mem_ctx, sdn);
	talloc_free(local_ctx);

	return sdn;
}

/* search the domain related to the provided dn
   allocate a new RID for the domain
   return the new sid string
*/
static struct dom_sid *samldb_get_new_sid(struct ldb_module *module, 
					  TALLOC_CTX *mem_ctx, const struct ldb_dn *obj_dn)
{
	const char * const attrs[2] = { "objectSid", NULL };
	struct ldb_message **res = NULL;
	const struct ldb_dn *dom_dn;
	uint32_t rid;
	int ret;
	struct dom_sid *dom_sid, *obj_sid;

	/* get the domain component part of the provided dn */

	/* FIXME: quick search here, I think we should use something like
	   ldap_parse_dn here to be 100% sure we get the right domain dn */

	/* FIXME: "dc=" is probably not utf8 safe either,
	   we need a multibyte safe substring search function here */
	
	dom_dn = samldb_search_domain(module, mem_ctx, obj_dn);
	if (dom_dn == NULL) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "Invalid dn (%s) not child of a domain object!\n", ldb_dn_linearize(mem_ctx, obj_dn));
		return NULL;
	}

	/* find the domain sid */

	ret = ldb_search(module->ldb, dom_dn, LDB_SCOPE_BASE, "objectSid=*", attrs, &res);
	if (ret != 1) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_get_new_sid: error retrieving domain sid!\n");
		talloc_free(res);
		return NULL;
	}

	dom_sid = samdb_result_dom_sid(res, res[0], "objectSid");
	if (dom_sid == NULL) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_get_new_sid: error retrieving domain sid!\n");
		talloc_free(res);
		return NULL;
	}

	/* allocate a new Rid for the domain */
	ret = samldb_allocate_next_rid(module->ldb, mem_ctx, dom_dn, &rid);
	if (ret != 0) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "Failed to increment nextRid of %s\n", ldb_dn_linearize(mem_ctx, dom_dn));
		talloc_free(res);
		return NULL;
	}

	/* return the new object sid */
	obj_sid = dom_sid_add_rid(mem_ctx, dom_sid, rid);

	talloc_free(res);

	return obj_sid;
}

static char *samldb_generate_samAccountName(const void *mem_ctx) {
	char *name;

	name = talloc_strdup(mem_ctx, SAM_ACCOUNT_NAME_BASE);
	/* TODO: randomize name */	

	return name;
}

/* if value is not null also check for attribute to have exactly that value */
static struct ldb_message_element *samldb_find_attribute(const struct ldb_message *msg, const char *name, const char *value)
{
	int i, j;

	for (i = 0; i < msg->num_elements; i++) {
		if (ldb_attr_cmp(name, msg->elements[i].name) == 0) {
			if (!value) {
				return &msg->elements[i];
			}
			for (j = 0; j < msg->elements[i].num_values; j++) {
				if (strcasecmp(value, 
					       (char *)msg->elements[i].values[j].data) == 0) {
					return &msg->elements[i];
				}
			}
		}
	}

	return NULL;
}

static BOOL samldb_msg_add_string(struct ldb_module *module, struct ldb_message *msg, const char *name, const char *value)
{
	char *aname = talloc_strdup(msg, name);
	char *aval = talloc_strdup(msg, value);

	if (aname == NULL || aval == NULL) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_msg_add_string: talloc_strdup failed!\n");
		return False;
	}

	if (ldb_msg_add_string(msg, aname, aval) != 0) {
		return False;
	}

	return True;
}

static BOOL samldb_msg_add_sid(struct ldb_module *module, struct ldb_message *msg, const char *name, const struct dom_sid *sid)
{
	struct ldb_val v;
	NTSTATUS status;
	status = ndr_push_struct_blob(&v, msg, sid, 
				      (ndr_push_flags_fn_t)ndr_push_dom_sid);
	if (!NT_STATUS_IS_OK(status)) {
		return -1;
	}
	return (ldb_msg_add_value(msg, name, &v) == 0);
}

static BOOL samldb_find_or_add_attribute(struct ldb_module *module, struct ldb_message *msg, const char *name, const char *value, const char *set_value)
{
	if (samldb_find_attribute(msg, name, value) == NULL) {
		return samldb_msg_add_string(module, msg, name, set_value);
	}
	return True;
}

static int samldb_copy_template(struct ldb_module *module, struct ldb_message *msg, const char *filter)
{
	struct ldb_message **res, *t;
	int ret, i, j;
	

	/* pull the template record */
	ret = ldb_search(module->ldb, NULL, LDB_SCOPE_SUBTREE, filter, NULL, &res);
	if (ret != 1) {
		ldb_debug(module->ldb, LDB_DEBUG_WARNING, "samldb: ERROR: template '%s' matched %d records\n", filter, ret);
		return -1;
	}
	t = res[0];

	for (i = 0; i < t->num_elements; i++) {
		struct ldb_message_element *el = &t->elements[i];
		/* some elements should not be copied from the template */
		if (strcasecmp(el->name, "cn") == 0 ||
		    strcasecmp(el->name, "name") == 0 ||
		    strcasecmp(el->name, "sAMAccountName") == 0 ||
		    strcasecmp(el->name, "objectGUID") == 0) {
			continue;
		}
		for (j = 0; j < el->num_values; j++) {
			if (strcasecmp(el->name, "objectClass") == 0 &&
			    (strcasecmp((char *)el->values[j].data, "Template") == 0 ||
			     strcasecmp((char *)el->values[j].data, "userTemplate") == 0 ||
			     strcasecmp((char *)el->values[j].data, "groupTemplate") == 0 ||
			     strcasecmp((char *)el->values[j].data, "foreignSecurityPrincipalTemplate") == 0 ||
			     strcasecmp((char *)el->values[j].data, "aliasTemplate") == 0 || 
			     strcasecmp((char *)el->values[j].data, "trustedDomainTemplate") == 0 || 
			     strcasecmp((char *)el->values[j].data, "secretTemplate") == 0)) {
				continue;
			}
			if ( ! samldb_find_or_add_attribute(module, msg, el->name, 
							    NULL,
							    (char *)el->values[j].data)) {
				ldb_debug(module->ldb, LDB_DEBUG_FATAL, "Attribute adding failed...\n");
				talloc_free(res);
				return -1;
			}
		}
	}

	talloc_free(res);

	return 0;
}

static struct ldb_message *samldb_fill_group_object(struct ldb_module *module, const struct ldb_message *msg)
{
	struct ldb_message *msg2;
	struct ldb_message_element *attribute;
	struct ldb_dn_component *rdn;

	if (samldb_find_attribute(msg, "objectclass", "group") == NULL) {
		return NULL;
	}

	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_fill_group_object\n");

	/* build the new msg */
	msg2 = ldb_msg_copy(module->ldb, msg);
	if (!msg2) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_group_object: ldb_msg_copy failed!\n");
		return NULL;
	}

	if (samldb_copy_template(module, msg2, "(&(CN=TemplateGroup)(objectclass=groupTemplate))") != 0) {
		ldb_debug(module->ldb, LDB_DEBUG_WARNING, "samldb_fill_group_object: Error copying template!\n");
		return NULL;
	}

	if ((rdn = ldb_dn_get_rdn(msg2, msg2->dn)) == NULL) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_group_object: Bad DN (%s)!\n", ldb_dn_linearize(msg2, msg2->dn));
		return NULL;
	}
	if (strcasecmp(rdn->name, "cn") != 0) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_group_object: Bad RDN (%s) for group!\n", rdn->name);
		return NULL;
	}

	if ((attribute = samldb_find_attribute(msg2, "objectSid", NULL)) == NULL ) {
		struct dom_sid *sid = samldb_get_new_sid(module, msg2, msg2->dn);
		if (sid == NULL) {
			ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_group_object: internal error! Can't generate new sid\n");
			return NULL;
		}

		if (!samldb_msg_add_sid(module, msg2, "objectSid", sid)) {
			talloc_free(sid);
			return NULL;
		}
		talloc_free(sid);
	}

	if ( ! samldb_find_or_add_attribute(module, msg2, "sAMAccountName", NULL, samldb_generate_samAccountName(msg2))) {
		return NULL;
	}

	talloc_steal(msg, msg2);

	return msg2;
}

static struct ldb_message *samldb_fill_user_or_computer_object(struct ldb_module *module, const struct ldb_message *msg)
{
	struct ldb_message *msg2;
	struct ldb_message_element *attribute;
	struct ldb_dn_component *rdn;

	if ((samldb_find_attribute(msg, "objectclass", "user") == NULL) && 
	    (samldb_find_attribute(msg, "objectclass", "computer") == NULL)) {
		return NULL;
	}

	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_fill_user_or_computer_object\n");

	/* build the new msg */
	msg2 = ldb_msg_copy(module->ldb, msg);
	if (!msg2) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_group_object: ldb_msg_copy failed!\n");
		return NULL;
	}

	if (samldb_find_attribute(msg, "objectclass", "computer") != NULL) {
		if (samldb_copy_template(module, msg2, "(&(CN=TemplateMemberServer)(objectclass=userTemplate))") != 0) {
			ldb_debug(module->ldb, LDB_DEBUG_WARNING, "samldb_fill_user_or_computer_object: Error copying computer template!\n");
			return NULL;
		}
	} else {
		if (samldb_copy_template(module, msg2, "(&(CN=TemplateUser)(objectclass=userTemplate))") != 0) {
			ldb_debug(module->ldb, LDB_DEBUG_WARNING, "samldb_fill_user_or_computer_object: Error copying user template!\n");
			return NULL;
		}
	}

	if ((rdn = ldb_dn_get_rdn(msg2, msg2->dn)) == NULL) {
		return NULL;
	}
	if (strcasecmp(rdn->name, "cn") != 0) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_user_or_computer_object: Bad RDN (%s) for user/computer!\n", rdn->name);
		return NULL;
	}

	/* if the only attribute was: "objectclass: computer", then make sure we also add "user" objectclass */
	if ( ! samldb_find_or_add_attribute(module, msg2, "objectclass", "user", "user")) {
		return NULL;
	}

	if ((attribute = samldb_find_attribute(msg2, "objectSid", NULL)) == NULL ) {
		struct dom_sid *sid;
		sid = samldb_get_new_sid(module, msg2, msg2->dn);
		if (sid == NULL) {
			ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_user_or_computer_object: internal error! Can't generate new sid\n");
			return NULL;
		}

		if ( ! samldb_msg_add_sid(module, msg2, "objectSid", sid)) {
			talloc_free(sid);
			return NULL;
		}
		talloc_free(sid);
	}

	if ( ! samldb_find_or_add_attribute(module, msg2, "sAMAccountName", NULL, samldb_generate_samAccountName(msg2))) {
		return NULL;
	}

	/* TODO: objectCategory, userAccountControl, badPwdCount, codePage, countryCode, badPasswordTime, lastLogoff, lastLogon, pwdLastSet, primaryGroupID, accountExpires, logonCount */

	return msg2;
}

static struct ldb_message *samldb_fill_foreignSecurityPrincipal_object(struct ldb_module *module, const struct ldb_message *msg)
{
	struct ldb_message *msg2;
	struct ldb_message_element *attribute;
	struct ldb_dn_component *rdn;

	if (samldb_find_attribute(msg, "objectclass", "foreignSecurityPrincipal") == NULL) {
		return NULL;
	}

	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_fill_foreignSecurityPrincipal_object\n");

	/* build the new msg */
	msg2 = ldb_msg_copy(module->ldb, msg);
	if (!msg2) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_foreignSecurityPrincpal_object: ldb_msg_copy failed!\n");
		return NULL;
	}

	talloc_steal(msg, msg2);

	if (samldb_copy_template(module, msg2, "(&(CN=TemplateForeignSecurityPrincipal)(objectclass=foreignSecurityPrincipalTemplate))") != 0) {
		ldb_debug(module->ldb, LDB_DEBUG_WARNING, "samldb_fill_foreignSecurityPrincipal_object: Error copying template!\n");
		return NULL;
	}

	if ((rdn = ldb_dn_get_rdn(msg2, msg2->dn)) == NULL) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_foreignSecurityPrincipal_object: Bad DN (%s)!\n", ldb_dn_linearize(msg2, msg2->dn));
		return NULL;
	}
	if (strcasecmp(rdn->name, "cn") != 0) {
		ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_foreignSecurityPrincipal_object: Bad RDN (%s) for foreignSecurityPrincpal!\n", rdn->name);
		return NULL;
	}

	if ((attribute = samldb_find_attribute(msg2, "objectSid", NULL)) == NULL ) {
		struct dom_sid *sid = dom_sid_parse_talloc(msg2, (char *)rdn->value.data);
		if (sid == NULL) {
			ldb_debug(module->ldb, LDB_DEBUG_FATAL, "samldb_fill_foreignSecurityPrincipal_object: internal error! Can't parse sid in CN\n");
			return NULL;
		}

		if (!samldb_msg_add_sid(module, msg2, "objectSid", sid)) {
			talloc_free(sid);
			return NULL;
		}
		talloc_free(sid);
	}

	return msg2;
}

/* add_record */
static int samldb_add_record(struct ldb_module *module, const struct ldb_message *msg)
{
	struct ldb_message *msg2 = NULL;
	int ret;

	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_add_record\n");

	
	if (ldb_dn_is_special(msg->dn)) { /* do not manipulate our control entries */
		return ldb_next_add_record(module, msg);
	}

	/* is user or computer?  add all relevant missing objects */
	msg2 = samldb_fill_user_or_computer_object(module, msg);

	/* is group? add all relevant missing objects */
	if ( ! msg2 ) {
		msg2 = samldb_fill_group_object(module, msg);
	}

	/* perhaps a foreignSecurityPrincipal? */
	if ( ! msg2 ) {
		msg2 = samldb_fill_foreignSecurityPrincipal_object(module, msg);
	}

	if (msg2) {
		ret = ldb_next_add_record(module, msg2);
	} else {
		ret = ldb_next_add_record(module, msg);
	}

	return ret;
}

/* modify_record: change modifyTimestamp as well */
static int samldb_modify_record(struct ldb_module *module, const struct ldb_message *msg)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_modify_record\n");
	return ldb_next_modify_record(module, msg);
}

static int samldb_delete_record(struct ldb_module *module, const struct ldb_dn *dn)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_delete_record\n");
	return ldb_next_delete_record(module, dn);
}

static int samldb_rename_record(struct ldb_module *module, const struct ldb_dn *olddn, const struct ldb_dn *newdn)
{
	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "samldb_rename_record\n");
	return ldb_next_rename_record(module, olddn, newdn);
}

static int samldb_destructor(void *module_ctx)
{
	/* struct ldb_module *ctx = module_ctx; */
	/* put your clean-up functions here */
	return 0;
}

static const struct ldb_module_ops samldb_ops = {
	.name          = "samldb",
	.search_bytree = samldb_search_bytree,
	.add_record    = samldb_add_record,
	.modify_record = samldb_modify_record,
	.delete_record = samldb_delete_record,
	.rename_record = samldb_rename_record
};


/* the init function */
#ifdef HAVE_DLOPEN_DISABLED
 struct ldb_module *init_module(struct ldb_context *ldb, const char *options[])
#else
struct ldb_module *samldb_module_init(struct ldb_context *ldb, const char *options[])
#endif
{
	struct ldb_module *ctx;

	ctx = talloc(ldb, struct ldb_module);
	if (!ctx)
		return NULL;

	ctx->private_data = NULL;
	ctx->ldb = ldb;
	ctx->prev = ctx->next = NULL;
	ctx->ops = &samldb_ops;

	talloc_set_destructor(ctx, samldb_destructor);

	return ctx;
}