summaryrefslogtreecommitdiff
path: root/source3/lib/tldap_util.c
blob: 7c579162a53ec8a0e1b74c2c672046ae8e006d96 (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
/*
   Unix SMB/CIFS implementation.
   Infrastructure for async ldap client requests
   Copyright (C) Volker Lendecke 2009

   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"

bool tldap_entry_values(struct tldap_message *msg, const char *attribute,
			int *num_values, DATA_BLOB **values)
{
	struct tldap_attribute *attributes;
	int i, num_attributes;

	if (!tldap_entry_attributes(msg, &num_attributes, &attributes)) {
		return false;
	}

	for (i=0; i<num_attributes; i++) {
		if (strequal(attribute, attributes[i].name)) {
			break;
		}
	}
	if (i == num_attributes) {
		return false;
	}
	*num_values = attributes[i].num_values;
	*values = attributes[i].values;
	return true;
}

bool tldap_get_single_valueblob(struct tldap_message *msg,
				const char *attribute, DATA_BLOB *blob)
{
	int num_values;
	DATA_BLOB *values;

	if (attribute == NULL) {
		return NULL;
	}
	if (!tldap_entry_values(msg, attribute, &num_values, &values)) {
		return NULL;
	}
	if (num_values != 1) {
		return NULL;
	}
	*blob = values[0];
	return true;
}

char *tldap_talloc_single_attribute(struct tldap_message *msg,
				    const char *attribute,
				    TALLOC_CTX *mem_ctx)
{
	DATA_BLOB val;
	char *result;
	size_t len;

	if (!tldap_get_single_valueblob(msg, attribute, &val)) {
		return false;
	}
	if (!convert_string_talloc(mem_ctx, CH_UTF8, CH_UNIX,
				   val.data, val.length,
				   &result, &len, false)) {
		return NULL;
	}
	return result;
}

bool tldap_pull_binsid(struct tldap_message *msg, const char *attribute,
		       struct dom_sid *sid)
{
	DATA_BLOB val;

	if (!tldap_get_single_valueblob(msg, attribute, &val)) {
		return false;
	}
	return sid_parse((char *)val.data, val.length, sid);
}

static bool tldap_add_blob_vals(TALLOC_CTX *mem_ctx, struct tldap_mod *mod,
				int num_newvals, DATA_BLOB *newvals)
{
	int num_values = talloc_array_length(mod->values);
	int i;
	DATA_BLOB *tmp;

	tmp = talloc_realloc(mem_ctx, mod->values, DATA_BLOB,
			     num_values + num_newvals);
	if (tmp == NULL) {
		return false;
	}
	mod->values = tmp;

	for (i=0; i<num_newvals; i++) {
		mod->values[i+num_values].data = (uint8_t *)talloc_memdup(
			mod->values, newvals[i].data, newvals[i].length);
		if (mod->values[i+num_values].data == NULL) {
			return false;
		}
		mod->values[i+num_values].length = newvals[i].length;
	}
	mod->num_values = num_values + num_newvals;
	return true;
}

bool tldap_add_mod_blobs(TALLOC_CTX *mem_ctx, struct tldap_mod **pmods,
			 int mod_op, const char *attrib,
			 int num_newvals, DATA_BLOB *newvals)
{
	struct tldap_mod new_mod;
	struct tldap_mod *mods = *pmods;
	struct tldap_mod *mod = NULL;
	int i, num_mods;

	if (mods == NULL) {
		mods = talloc_array(mem_ctx, struct tldap_mod, 0);
	}
	if (mods == NULL) {
		return false;
	}

	num_mods = talloc_array_length(mods);

	for (i=0; i<num_mods; i++) {
		if ((mods[i].mod_op == mod_op)
		    && strequal(mods[i].attribute, attrib)) {
			mod = &mods[i];
			break;
		}
	}

	if (mod == NULL) {
		new_mod.mod_op = mod_op;
		new_mod.attribute = talloc_strdup(mods, attrib);
		if (new_mod.attribute == NULL) {
			return false;
		}
		new_mod.num_values = 0;
		new_mod.values = NULL;
		mod = &new_mod;
	}

	if ((num_newvals != 0)
	    && !tldap_add_blob_vals(mods, mod, num_newvals, newvals)) {
		return false;
	}

	if (i == num_mods) {
		mods = talloc_realloc(talloc_tos(), mods, struct tldap_mod,
				      num_mods+1);
		if (mods == NULL) {
			return false;
		}
		mods[num_mods] = *mod;
	}

	*pmods = mods;
	return true;
}

bool tldap_add_mod_str(TALLOC_CTX *mem_ctx, struct tldap_mod **pmods,
		       int mod_op, const char *attrib, const char *str)
{
	DATA_BLOB utf8;
	bool ret;

	if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_UTF8, str,
				   strlen(str), &utf8.data, &utf8.length,
				   false)) {
		return false;
	}

	ret = tldap_add_mod_blobs(mem_ctx, pmods, mod_op, attrib, 1, &utf8);
	TALLOC_FREE(utf8.data);
	return ret;
}

static bool tldap_make_mod_blob_int(struct tldap_message *existing,
				    TALLOC_CTX *mem_ctx,
				    int *pnum_mods, struct tldap_mod **pmods,
				    const char *attrib, DATA_BLOB newval,
				    int (*comparison)(const DATA_BLOB *d1,
						      const DATA_BLOB *d2))
{
	int num_values = 0;
	DATA_BLOB *values = NULL;
	DATA_BLOB oldval = data_blob_null;

	if ((existing != NULL)
	    && tldap_entry_values(existing, attrib, &num_values, &values)) {

		if (num_values > 1) {
			/* can't change multivalue attributes atm */
			return false;
		}
		if (num_values == 1) {
			oldval = values[0];
		}
	}

	if ((oldval.data != NULL) && (newval.data != NULL)
	    && (comparison(&oldval, &newval) == 0)) {
		/* Believe it or not, but LDAP will deny a delete and
		   an add at the same time if the values are the
		   same... */
		DEBUG(10,("smbldap_make_mod_blob: attribute |%s| not "
			  "changed.\n", attrib));
		return true;
	}

	if (oldval.data != NULL) {
		/* By deleting exactly the value we found in the entry this
		 * should be race-free in the sense that the LDAP-Server will
		 * deny the complete operation if somebody changed the
		 * attribute behind our back. */
		/* This will also allow modifying single valued attributes in
		 * Novell NDS. In NDS you have to first remove attribute and
		 * then you could add new value */

		DEBUG(10, ("smbldap_make_mod_blob: deleting attribute |%s|\n",
			   attrib));
		if (!tldap_add_mod_blobs(mem_ctx, pmods, TLDAP_MOD_DELETE,
					 attrib, 1, &oldval)) {
			return false;
		}
	}

	/* Regardless of the real operation (add or modify)
	   we add the new value here. We rely on deleting
	   the old value, should it exist. */

	if (newval.data != NULL) {
		DEBUG(10, ("smbldap_make_mod: adding attribute |%s| value len "
			   "%d\n", attrib, (int)newval.length));
	        if (!tldap_add_mod_blobs(mem_ctx, pmods, TLDAP_MOD_ADD,
					 attrib, 1, &newval)) {
			return false;
		}
	}
	*pnum_mods = talloc_array_length(*pmods);
	return true;
}

bool tldap_make_mod_blob(struct tldap_message *existing, TALLOC_CTX *mem_ctx,
			 int *pnum_mods, struct tldap_mod **pmods,
			 const char *attrib, DATA_BLOB newval)
{
	return tldap_make_mod_blob_int(existing, mem_ctx, pnum_mods, pmods,
				       attrib, newval, data_blob_cmp);
}

static int compare_utf8_blobs(const DATA_BLOB *d1, const DATA_BLOB *d2)
{
	char *s1, *s2;
	size_t s1len, s2len;
	int ret;

	if (!convert_string_talloc(talloc_tos(), CH_UTF8, CH_UNIX, d1->data,
				   d1->length, &s1, &s1len, false)) {
		/* can't do much here */
		return 0;
	}
	if (!convert_string_talloc(talloc_tos(), CH_UTF8, CH_UNIX, d2->data,
				   d2->length, &s2, &s2len, false)) {
		/* can't do much here */
		TALLOC_FREE(s1);
		return 0;
	}
	ret = StrCaseCmp(s1, s2);
	TALLOC_FREE(s2);
	TALLOC_FREE(s1);
	return ret;
}

bool tldap_make_mod_fmt(struct tldap_message *existing, TALLOC_CTX *mem_ctx,
			int *pnum_mods, struct tldap_mod **pmods,
			const char *attrib, const char *fmt, ...)
{
	va_list ap;
	char *newval;
	bool ret;
	DATA_BLOB blob = data_blob_null;

	va_start(ap, fmt);
	newval = talloc_vasprintf(talloc_tos(), fmt, ap);
	va_end(ap);

	if (newval == NULL) {
		return false;
	}

	blob.length = strlen(newval);
	if (blob.length != 0) {
		blob.data = CONST_DISCARD(uint8_t *, newval);
	}
	ret = tldap_make_mod_blob_int(existing, mem_ctx, pnum_mods, pmods,
				      attrib, blob, compare_utf8_blobs);
	TALLOC_FREE(newval);
	return ret;
}

const char *tldap_errstr(TALLOC_CTX *mem_ctx, struct tldap_context *ld, int rc)
{
	const char *ld_error = NULL;
	char *res;

	ld_error = tldap_ctx_diagnosticmessage(ld);
	res = talloc_asprintf(mem_ctx, "LDAP error %d (%s), %s", rc,
			      tldap_err2string(rc),
			      ld_error ? ld_error : "unknown");
	return res;
}

int tldap_search_fmt(struct tldap_context *ld, const char *base, int scope,
		     const char *attrs[], int num_attrs, int attrsonly,
		     TALLOC_CTX *mem_ctx, struct tldap_message ***res,
		     const char *fmt, ...)
{
	va_list ap;
	char *filter;
	int ret;

	va_start(ap, fmt);
	filter = talloc_vasprintf(talloc_tos(), fmt, ap);
	va_end(ap);

	if (filter == NULL) {
		return TLDAP_NO_MEMORY;
	}
	ret = tldap_search(ld, base, scope, filter,
			   attrs, num_attrs, attrsonly,
			   NULL /*sctrls*/, NULL /*cctrls*/,
			   0 /*timelimit*/, 0 /*sizelimit*/, 0 /*deref*/,
			   mem_ctx, res, NULL);
	TALLOC_FREE(filter);
	return ret;
}

bool tldap_pull_uint64(struct tldap_message *msg, const char *attr,
		       uint64_t *presult)
{
	char *str;
	uint64_t result;

	str = tldap_talloc_single_attribute(msg, attr, talloc_tos());
	if (str == NULL) {
		DEBUG(10, ("Could not find attribute %s\n", attr));
		return false;
	}
	result = strtoull(str, NULL, 10);
	TALLOC_FREE(str);
	*presult = result;
	return true;
}

bool tldap_pull_uint32(struct tldap_message *msg, const char *attr,
		       uint32_t *presult)
{
	uint64_t result;

	if (!tldap_pull_uint64(msg, attr, &result)) {
		return false;
	}
	*presult = (uint32_t)result;
	return true;
}