summaryrefslogtreecommitdiff
path: root/source4/lib/ldb/modules/rdn_name.c
blob: a0867c0f51d33501fbb335d908ab481453f7231e (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
/* 
   ldb database library

   Copyright (C) Andrew Bartlett 2005-2009
   Copyright (C) Simo Sorce 2006-2008

     ** NOTE! The following LGPL license applies to the ldb
     ** library. This does NOT imply that all of Samba is released
     ** under the LGPL
   
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/

/*
 *  Name: rdn_name
 *
 *  Component: ldb rdn name module
 *
 *  Description: keep a consistent name attribute on objects manpulations
 *
 *  Author: Andrew Bartlett
 *
 *  Modifications:
 *    - made the module async
 *      Simo Sorce Mar 2006
 */

#include "ldb_includes.h"
#include "ldb_module.h"

struct rename_context {
	struct ldb_module *module;
	struct ldb_request *req;

	struct ldb_reply *ares;
};

static int rdn_name_add_callback(struct ldb_request *req,
				 struct ldb_reply *ares)
{
	struct rename_context *ac;

	ac = talloc_get_type(req->context, struct rename_context);

	if (!ares) {
		return ldb_module_done(ac->req, NULL, NULL,
					LDB_ERR_OPERATIONS_ERROR);
	}

	if (ares->type == LDB_REPLY_REFERRAL) {
		return ldb_module_send_referral(ac->req, ares->referral);
	}

	if (ares->error != LDB_SUCCESS) {
		return ldb_module_done(ac->req, ares->controls,
					ares->response, ares->error);
	}

	if (ares->type != LDB_REPLY_DONE) {
		return ldb_module_done(ac->req, NULL, NULL,
					LDB_ERR_OPERATIONS_ERROR);
	}

	return ldb_module_done(ac->req, ares->controls,
					ares->response, LDB_SUCCESS);
}

static int rdn_name_add(struct ldb_module *module, struct ldb_request *req)
{
	struct ldb_context *ldb;
	struct ldb_request *down_req;
	struct rename_context *ac;
	struct ldb_message *msg;
	struct ldb_message_element *attribute;
	const struct ldb_schema_attribute *a;
	const char *rdn_name;
	struct ldb_val rdn_val;
	unsigned int i;
	int ret;

	ldb = ldb_module_get_ctx(module);

	/* do not manipulate our control entries */
	if (ldb_dn_is_special(req->op.add.message->dn)) {
		return ldb_next_request(module, req);
	}

	ac = talloc_zero(req, struct rename_context);
	if (ac == NULL) {
		return LDB_ERR_OPERATIONS_ERROR;
	}

	ac->module = module;
	ac->req = req;

	msg = ldb_msg_copy_shallow(req, req->op.add.message);
	if (msg == NULL) {
		return LDB_ERR_OPERATIONS_ERROR;
	}

	rdn_name = ldb_dn_get_rdn_name(msg->dn);
	if (rdn_name == NULL) {
		return LDB_ERR_OPERATIONS_ERROR;
	}
	
	rdn_val = ldb_val_dup(msg, ldb_dn_get_rdn_val(msg->dn));
	
	/* Perhaps someone above us tried to set this? Then ignore it */
	ldb_msg_remove_attr(msg, "name");

	ret = ldb_msg_add_value(msg, "name", &rdn_val, NULL);
	if (ret != LDB_SUCCESS) {
		return ret;
	}

	a = ldb_schema_attribute_by_name(ldb, rdn_name);
	if (a == NULL) {
		return LDB_ERR_OPERATIONS_ERROR;
	}

	attribute = ldb_msg_find_element(msg, rdn_name);
	if (!attribute) {
		/* add entry with normalised RDN information if possible */
		if (a->name != NULL) {
			ret = ldb_msg_add_value(msg, a->name, &rdn_val, NULL);
		} else {
			ret = ldb_msg_add_value(msg, rdn_name, &rdn_val, NULL);
		}
		if (ret != LDB_SUCCESS) {
			return ret;
		}
	} else {
		/* normalise attribute name if possible */
		if (a->name != NULL) {
			attribute->name = a->name;
		}
		/* normalise attribute value */
		for (i = 0; i < attribute->num_values; i++) {
			bool matched;
			if (a->syntax->operator_fn) {
				ret = a->syntax->operator_fn(ldb, LDB_OP_EQUALITY, a,
							     &rdn_val, &attribute->values[i], &matched);
				if (ret != LDB_SUCCESS) return ret;
			} else {
				matched = (a->syntax->comparison_fn(ldb, msg,
								    &rdn_val, &attribute->values[i]) == 0);
			}
			if (matched) {
				/* overwrite so it matches in case */
				attribute->values[i] = rdn_val;
				break;
			}
		}
		if (i == attribute->num_values) {
			char *rdn_errstring = talloc_asprintf(ac,
				"RDN mismatch on %s: %s (%.*s) should match one of:", 
				ldb_dn_get_linearized(msg->dn), rdn_name, 
				(int)rdn_val.length, (const char *)rdn_val.data);
			for (i = 0; i < attribute->num_values; i++) {
				rdn_errstring = talloc_asprintf_append(
					rdn_errstring, " (%.*s)",
					(int)attribute->values[i].length, 
					(const char *)attribute->values[i].data);
			}
			ldb_set_errstring(ldb, rdn_errstring);
			/* Match AD's error here */
			return LDB_ERR_INVALID_DN_SYNTAX;
		}
	}

	ret = ldb_build_add_req(&down_req, ldb, req,
				msg,
				req->controls,
				ac, rdn_name_add_callback,
				req);
	if (ret != LDB_SUCCESS) {
		return ret;
	}

	talloc_steal(down_req, msg);

	/* go on with the call chain */
	return ldb_next_request(module, down_req);
}

static int rdn_modify_callback(struct ldb_request *req, struct ldb_reply *ares)
{
	struct rename_context *ac;

	ac = talloc_get_type(req->context, struct rename_context);

	if (!ares) {
		return ldb_module_done(ac->req, NULL, NULL,
					LDB_ERR_OPERATIONS_ERROR);
	}

	if (ares->type == LDB_REPLY_REFERRAL) {
		return ldb_module_send_referral(ac->req, ares->referral);
	}

	if (ares->error != LDB_SUCCESS) {
		return ldb_module_done(ac->req, ares->controls,
					ares->response, ares->error);
	}

	/* the only supported reply right now is a LDB_REPLY_DONE */
	if (ares->type != LDB_REPLY_DONE) {
		return ldb_module_done(ac->req, NULL, NULL,
					LDB_ERR_OPERATIONS_ERROR);
	}

	/* send saved controls eventually */
	return ldb_module_done(ac->req, ac->ares->controls,
				ac->ares->response, LDB_SUCCESS);
}

static int rdn_rename_callback(struct ldb_request *req, struct ldb_reply *ares)
{
	struct ldb_context *ldb;
	struct rename_context *ac;
	struct ldb_request *mod_req;
	const char *rdn_name;
	struct ldb_val rdn_val;
	struct ldb_message *msg;
	int ret;

	ac = talloc_get_type(req->context, struct rename_context);
	ldb = ldb_module_get_ctx(ac->module);

	if (!ares) {
		goto error;
	}

	if (ares->type == LDB_REPLY_REFERRAL) {
		return ldb_module_send_referral(ac->req, ares->referral);
	}

	if (ares->error != LDB_SUCCESS) {
		return ldb_module_done(ac->req, ares->controls,
					ares->response, ares->error);
	}

	/* the only supported reply right now is a LDB_REPLY_DONE */
	if (ares->type != LDB_REPLY_DONE) {
		goto error;
	}

	/* save reply for caller */
	ac->ares = talloc_steal(ac, ares);

	msg = ldb_msg_new(ac);
	if (msg == NULL) {
		goto error;
	}
	msg->dn = ldb_dn_copy(msg, ac->req->op.rename.newdn);
	if (msg->dn == NULL) {
		goto error;
	}
	rdn_name = ldb_dn_get_rdn_name(ac->req->op.rename.newdn);
	if (rdn_name == NULL) {
		goto error;
	}
	
	rdn_val = ldb_val_dup(msg, ldb_dn_get_rdn_val(ac->req->op.rename.newdn));
	
	if (ldb_msg_add_empty(msg, rdn_name, LDB_FLAG_MOD_REPLACE, NULL) != 0) {
		goto error;
	}
	if (ldb_msg_add_value(msg, rdn_name, &rdn_val, NULL) != 0) {
		goto error;
	}
	if (ldb_msg_add_empty(msg, "name", LDB_FLAG_MOD_REPLACE, NULL) != 0) {
		goto error;
	}
	if (ldb_msg_add_value(msg, "name", &rdn_val, NULL) != 0) {
		goto error;
	}

	ret = ldb_build_mod_req(&mod_req, ldb,
				ac, msg, NULL,
				ac, rdn_modify_callback,
				req);
	if (ret != LDB_SUCCESS) {
		return ldb_module_done(ac->req, NULL, NULL, ret);
	}
	talloc_steal(mod_req, msg);

	/* go on with the call chain */
	return ldb_next_request(ac->module, mod_req);

error:
	return ldb_module_done(ac->req, NULL, NULL,
						 LDB_ERR_OPERATIONS_ERROR);
}

static int rdn_name_rename(struct ldb_module *module, struct ldb_request *req)
{
	struct ldb_context *ldb;
	struct rename_context *ac;
	struct ldb_request *down_req;
	int ret;

	ldb = ldb_module_get_ctx(module);

	/* do not manipulate our control entries */
	if (ldb_dn_is_special(req->op.rename.newdn)) {
		return ldb_next_request(module, req);
	}

	ac = talloc_zero(req, struct rename_context);
	if (ac == NULL) {
		return LDB_ERR_OPERATIONS_ERROR;
	}

	ac->module = module;
	ac->req = req;

	ret = ldb_build_rename_req(&down_req,
				   ldb,
				   ac,
				   req->op.rename.olddn,
				   req->op.rename.newdn,
				   req->controls,
				   ac,
				   rdn_rename_callback,
				   req);

	if (ret != LDB_SUCCESS) {
		return ret;
	}

	/* rename first, modify "name" if rename is ok */
	return ldb_next_request(module, down_req);
}

static int rdn_name_modify(struct ldb_module *module, struct ldb_request *req)
{
	struct ldb_context *ldb;

	ldb = ldb_module_get_ctx(module);

	/* do not manipulate our control entries */
	if (ldb_dn_is_special(req->op.mod.message->dn)) {
		return ldb_next_request(module, req);
	}

	if (ldb_msg_find_element(req->op.mod.message, "distinguishedName")) {
		ldb_asprintf_errstring(ldb, "Modify of 'distinguishedName' on %s not permitted, must use 'rename' operation instead",
				       ldb_dn_get_linearized(req->op.mod.message->dn));
		return LDB_ERR_CONSTRAINT_VIOLATION;
	}

	if (ldb_msg_find_element(req->op.mod.message, "name")) {
		ldb_asprintf_errstring(ldb, "Modify of 'name' on %s not permitted, must use 'rename' operation instead",
				       ldb_dn_get_linearized(req->op.mod.message->dn));
		return LDB_ERR_NOT_ALLOWED_ON_RDN;
	}

	if (ldb_msg_find_element(req->op.mod.message, ldb_dn_get_rdn_name(req->op.mod.message->dn))) {
		ldb_asprintf_errstring(ldb, "Modify of RDN '%s' on %s not permitted, must use 'rename' operation instead",
				       ldb_dn_get_rdn_name(req->op.mod.message->dn), ldb_dn_get_linearized(req->op.mod.message->dn));
		return LDB_ERR_NOT_ALLOWED_ON_RDN;
	}

	/* All OK, they kept their fingers out of the special attributes */
	return ldb_next_request(module, req);
}

const struct ldb_module_ops ldb_rdn_name_module_ops = {
	.name              = "rdn_name",
	.add               = rdn_name_add,
	.modify            = rdn_name_modify,
	.rename            = rdn_name_rename
};