Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 : LDAP protocol helper functions for SAMBA
4 : Copyright (C) Jean François Micouleau 1998
5 : Copyright (C) Gerald Carter 2001-2003
6 : Copyright (C) Shahms King 2001
7 : Copyright (C) Andrew Bartlett 2002-2003
8 : Copyright (C) Stefan (metze) Metzmacher 2002-2003
9 :
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.
14 :
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.
19 :
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/>.
22 :
23 : */
24 :
25 : #include "includes.h"
26 : #include "smbldap.h"
27 : #include "../libcli/security/security.h"
28 : #include <tevent.h>
29 : #include "lib/param/loadparm.h"
30 :
31 : /* Try not to hit the up or down server forever */
32 :
33 : #define SMBLDAP_DONT_PING_TIME 10 /* ping only all 10 seconds */
34 : #define SMBLDAP_NUM_RETRIES 8 /* retry only 8 times */
35 :
36 : #define SMBLDAP_IDLE_TIME 150 /* After 2.5 minutes disconnect */
37 :
38 : struct smbldap_state {
39 : LDAP *ldap_struct;
40 : pid_t pid;
41 : time_t last_ping; /* monotonic */
42 : /* retrieve-once info */
43 : const char *uri;
44 :
45 : /* credentials */
46 : bool anonymous;
47 : char *bind_dn;
48 : char *bind_secret;
49 : smbldap_bind_callback_fn bind_callback;
50 : void *bind_callback_data;
51 :
52 : bool paged_results;
53 :
54 : unsigned int num_failures;
55 :
56 : time_t last_use; /* monotonic */
57 : struct tevent_context *tevent_context;
58 : struct tevent_timer *idle_event;
59 :
60 : struct timeval last_rebind; /* monotonic */
61 : };
62 :
63 0 : LDAP *smbldap_get_ldap(struct smbldap_state *state)
64 : {
65 0 : return state->ldap_struct;
66 : }
67 :
68 0 : bool smbldap_get_paged_results(struct smbldap_state *state)
69 : {
70 0 : return state->paged_results;
71 : }
72 :
73 0 : void smbldap_set_paged_results(struct smbldap_state *state,
74 : bool paged_results)
75 : {
76 0 : state->paged_results = paged_results;
77 0 : }
78 :
79 0 : void smbldap_set_bind_callback(struct smbldap_state *state,
80 : smbldap_bind_callback_fn callback,
81 : void *callback_data)
82 : {
83 0 : state->bind_callback = callback;
84 0 : state->bind_callback_data = callback_data;
85 0 : }
86 : /*******************************************************************
87 : Search an attribute and return the first value found.
88 : ******************************************************************/
89 :
90 0 : bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
91 : const char *attribute, char *value,
92 : int max_len)
93 : {
94 0 : char **values;
95 0 : size_t size = 0;
96 :
97 0 : if ( !attribute )
98 0 : return False;
99 :
100 0 : value[0] = '\0';
101 :
102 0 : if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
103 0 : DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
104 :
105 0 : return False;
106 : }
107 :
108 0 : if (!convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, &size)) {
109 0 : DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
110 : attribute, values[0]));
111 0 : ldap_value_free(values);
112 0 : return False;
113 : }
114 :
115 0 : ldap_value_free(values);
116 : #ifdef DEBUG_PASSWORDS
117 : DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
118 : #endif
119 0 : return True;
120 : }
121 :
122 0 : char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
123 : const char *attribute,
124 : TALLOC_CTX *mem_ctx)
125 : {
126 0 : char **values;
127 0 : char *result;
128 0 : size_t converted_size;
129 :
130 0 : if (attribute == NULL) {
131 0 : return NULL;
132 : }
133 :
134 0 : values = ldap_get_values(ldap_struct, entry, attribute);
135 :
136 0 : if (values == NULL) {
137 0 : DEBUG(10, ("attribute %s does not exist\n", attribute));
138 0 : return NULL;
139 : }
140 :
141 0 : if (ldap_count_values(values) != 1) {
142 0 : DEBUG(10, ("attribute %s has %d values, expected only one\n",
143 : attribute, ldap_count_values(values)));
144 0 : ldap_value_free(values);
145 0 : return NULL;
146 : }
147 :
148 0 : if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
149 0 : DEBUG(10, ("pull_utf8_talloc failed\n"));
150 0 : ldap_value_free(values);
151 0 : return NULL;
152 : }
153 :
154 0 : ldap_value_free(values);
155 :
156 : #ifdef DEBUG_PASSWORDS
157 : DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
158 : attribute, result));
159 : #endif
160 0 : return result;
161 : }
162 :
163 0 : char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry,
164 : const char *attribute,
165 : TALLOC_CTX *mem_ctx)
166 : {
167 0 : char **values;
168 0 : char *result;
169 0 : size_t converted_size;
170 :
171 0 : if (attribute == NULL) {
172 0 : return NULL;
173 : }
174 :
175 0 : values = ldap_get_values(ldap_struct, entry, attribute);
176 :
177 0 : if (values == NULL) {
178 0 : DEBUG(10, ("attribute %s does not exist\n", attribute));
179 0 : return NULL;
180 : }
181 :
182 0 : if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
183 0 : DEBUG(10, ("pull_utf8_talloc failed\n"));
184 0 : ldap_value_free(values);
185 0 : return NULL;
186 : }
187 :
188 0 : ldap_value_free(values);
189 :
190 : #ifdef DEBUG_PASSWORDS
191 : DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n",
192 : attribute, result));
193 : #endif
194 0 : return result;
195 : }
196 :
197 0 : char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
198 : const char *attribute,
199 : TALLOC_CTX *mem_ctx)
200 : {
201 0 : char **values;
202 0 : char *result;
203 0 : size_t converted_size;
204 0 : int i, num_values;
205 :
206 0 : if (attribute == NULL) {
207 0 : return NULL;
208 : }
209 :
210 0 : values = ldap_get_values(ldap_struct, entry, attribute);
211 :
212 0 : if (values == NULL) {
213 0 : DEBUG(10, ("attribute %s does not exist\n", attribute));
214 0 : return NULL;
215 : }
216 :
217 0 : if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
218 0 : DEBUG(10, ("pull_utf8_talloc failed\n"));
219 0 : ldap_value_free(values);
220 0 : return NULL;
221 : }
222 :
223 0 : num_values = ldap_count_values(values);
224 :
225 0 : for (i=1; i<num_values; i++) {
226 0 : char *tmp;
227 :
228 0 : if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
229 : &converted_size)) {
230 0 : DEBUG(10, ("pull_utf8_talloc failed\n"));
231 0 : TALLOC_FREE(result);
232 0 : ldap_value_free(values);
233 0 : return NULL;
234 : }
235 :
236 0 : if (strcasecmp_m(tmp, result) < 0) {
237 0 : TALLOC_FREE(result);
238 0 : result = tmp;
239 : } else {
240 0 : TALLOC_FREE(tmp);
241 : }
242 : }
243 :
244 0 : ldap_value_free(values);
245 :
246 : #ifdef DEBUG_PASSWORDS
247 : DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
248 : attribute, result));
249 : #endif
250 0 : return result;
251 : }
252 :
253 178 : bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
254 : LDAPMessage *msg, const char *attrib,
255 : DATA_BLOB *blob)
256 : {
257 0 : struct berval **values;
258 :
259 178 : values = ldap_get_values_len(ld, msg, attrib);
260 178 : if (!values) {
261 0 : return false;
262 : }
263 :
264 178 : if (ldap_count_values_len(values) != 1) {
265 0 : DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
266 : ldap_count_values_len(values)));
267 0 : return false;
268 : }
269 :
270 178 : *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
271 : values[0]->bv_len);
272 178 : ldap_value_free_len(values);
273 :
274 178 : return (blob->data != NULL);
275 : }
276 :
277 178 : bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
278 : struct dom_sid *sid)
279 : {
280 0 : DATA_BLOB blob;
281 0 : ssize_t ret;
282 :
283 178 : if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
284 : &blob)) {
285 0 : return false;
286 : }
287 178 : ret = sid_parse(blob.data, blob.length, sid);
288 178 : TALLOC_FREE(blob.data);
289 178 : return (ret != -1);
290 : }
291 :
292 0 : static int ldapmsg_destructor(LDAPMessage **result) {
293 0 : ldap_msgfree(*result);
294 0 : return 0;
295 : }
296 :
297 0 : void smbldap_talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
298 : {
299 0 : LDAPMessage **handle;
300 :
301 0 : if (result == NULL) {
302 0 : return;
303 : }
304 :
305 0 : handle = talloc(mem_ctx, LDAPMessage *);
306 0 : SMB_ASSERT(handle != NULL);
307 :
308 0 : *handle = result;
309 0 : talloc_set_destructor(handle, ldapmsg_destructor);
310 : }
311 :
312 0 : static int ldapmod_destructor(LDAPMod ***mod) {
313 0 : ldap_mods_free(*mod, True);
314 0 : return 0;
315 : }
316 :
317 0 : void smbldap_talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
318 : {
319 0 : LDAPMod ***handle;
320 :
321 0 : if (mod == NULL) {
322 0 : return;
323 : }
324 :
325 0 : handle = talloc(mem_ctx, LDAPMod **);
326 0 : SMB_ASSERT(handle != NULL);
327 :
328 0 : *handle = mod;
329 0 : talloc_set_destructor(handle, ldapmod_destructor);
330 : }
331 :
332 : /************************************************************************
333 : Routine to manage the LDAPMod structure array
334 : manage memory used by the array, by each struct, and values
335 : ***********************************************************************/
336 :
337 0 : static void smbldap_set_mod_internal(LDAPMod *** modlist, int modop, const char *attribute, const char *value, const DATA_BLOB *blob)
338 : {
339 0 : LDAPMod **mods;
340 0 : int i;
341 0 : int j;
342 :
343 0 : mods = *modlist;
344 :
345 : /* sanity checks on the mod values */
346 :
347 0 : if (attribute == NULL || *attribute == '\0') {
348 0 : return;
349 : }
350 :
351 : #if 0 /* commented out after discussion with abartlet. Do not re-enable.
352 : left here so other do not re-add similar code --jerry */
353 : if (value == NULL || *value == '\0')
354 : return;
355 : #endif
356 :
357 0 : if (mods == NULL) {
358 0 : mods = SMB_MALLOC_P(LDAPMod *);
359 0 : if (mods == NULL) {
360 0 : smb_panic("smbldap_set_mod: out of memory!");
361 : /* notreached. */
362 : }
363 0 : mods[0] = NULL;
364 : }
365 :
366 0 : for (i = 0; mods[i] != NULL; ++i) {
367 0 : if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
368 0 : break;
369 : }
370 :
371 0 : if (mods[i] == NULL) {
372 0 : mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
373 0 : if (mods == NULL) {
374 0 : smb_panic("smbldap_set_mod: out of memory!");
375 : /* notreached. */
376 : }
377 0 : mods[i] = SMB_MALLOC_P(LDAPMod);
378 0 : if (mods[i] == NULL) {
379 0 : smb_panic("smbldap_set_mod: out of memory!");
380 : /* notreached. */
381 : }
382 0 : mods[i]->mod_op = modop;
383 0 : mods[i]->mod_values = NULL;
384 0 : mods[i]->mod_type = SMB_STRDUP(attribute);
385 0 : mods[i + 1] = NULL;
386 : }
387 :
388 0 : if (blob && (modop & LDAP_MOD_BVALUES)) {
389 0 : j = 0;
390 0 : if (mods[i]->mod_bvalues != NULL) {
391 0 : for (; mods[i]->mod_bvalues[j] != NULL; j++);
392 : }
393 0 : mods[i]->mod_bvalues = SMB_REALLOC_ARRAY(mods[i]->mod_bvalues, struct berval *, j + 2);
394 :
395 0 : if (mods[i]->mod_bvalues == NULL) {
396 0 : smb_panic("smbldap_set_mod: out of memory!");
397 : /* notreached. */
398 : }
399 :
400 0 : mods[i]->mod_bvalues[j] = SMB_MALLOC_P(struct berval);
401 0 : SMB_ASSERT(mods[i]->mod_bvalues[j] != NULL);
402 :
403 0 : mods[i]->mod_bvalues[j]->bv_val = (char *)smb_memdup(blob->data, blob->length);
404 0 : SMB_ASSERT(mods[i]->mod_bvalues[j]->bv_val != NULL);
405 0 : mods[i]->mod_bvalues[j]->bv_len = blob->length;
406 :
407 0 : mods[i]->mod_bvalues[j + 1] = NULL;
408 0 : } else if (value != NULL) {
409 0 : char *utf8_value = NULL;
410 0 : size_t converted_size;
411 :
412 0 : j = 0;
413 0 : if (mods[i]->mod_values != NULL) {
414 0 : for (; mods[i]->mod_values[j] != NULL; j++);
415 : }
416 0 : mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
417 :
418 0 : if (mods[i]->mod_values == NULL) {
419 0 : smb_panic("smbldap_set_mod: out of memory!");
420 : /* notreached. */
421 : }
422 :
423 0 : if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
424 0 : smb_panic("smbldap_set_mod: String conversion failure!");
425 : /* notreached. */
426 : }
427 :
428 0 : mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
429 0 : TALLOC_FREE(utf8_value);
430 0 : SMB_ASSERT(mods[i]->mod_values[j] != NULL);
431 :
432 0 : mods[i]->mod_values[j + 1] = NULL;
433 : }
434 0 : *modlist = mods;
435 : }
436 :
437 0 : void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
438 : {
439 0 : smbldap_set_mod_internal(modlist, modop, attribute, value, NULL);
440 0 : }
441 :
442 0 : void smbldap_set_mod_blob(LDAPMod *** modlist, int modop, const char *attribute, const DATA_BLOB *value)
443 : {
444 0 : smbldap_set_mod_internal(modlist, modop | LDAP_MOD_BVALUES, attribute, NULL, value);
445 0 : }
446 :
447 : /**********************************************************************
448 : Set attribute to newval in LDAP, regardless of what value the
449 : attribute had in LDAP before.
450 : *********************************************************************/
451 :
452 0 : static void smbldap_make_mod_internal(LDAP *ldap_struct, LDAPMessage *existing,
453 : LDAPMod ***mods,
454 : const char *attribute, int op,
455 : const char *newval,
456 : const DATA_BLOB *newblob)
457 : {
458 0 : char oldval[2048]; /* current largest allowed value is mungeddial */
459 0 : bool existed;
460 0 : DATA_BLOB oldblob = data_blob_null;
461 :
462 0 : if (existing != NULL) {
463 0 : if (op & LDAP_MOD_BVALUES) {
464 0 : existed = smbldap_talloc_single_blob(talloc_tos(), ldap_struct, existing, attribute, &oldblob);
465 : } else {
466 0 : existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
467 : }
468 : } else {
469 0 : existed = False;
470 0 : *oldval = '\0';
471 : }
472 :
473 0 : if (existed) {
474 0 : bool equal = false;
475 0 : if (op & LDAP_MOD_BVALUES) {
476 0 : equal = (newblob && (data_blob_cmp(&oldblob, newblob) == 0));
477 : } else {
478 : /* all of our string attributes are case insensitive */
479 0 : equal = (newval && (strcasecmp_m(oldval, newval) == 0));
480 : }
481 :
482 0 : if (equal) {
483 : /* Believe it or not, but LDAP will deny a delete and
484 : an add at the same time if the values are the
485 : same... */
486 0 : DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
487 0 : return;
488 : }
489 :
490 : /* There has been no value before, so don't delete it.
491 : * Here's a possible race: We might end up with
492 : * duplicate attributes */
493 : /* By deleting exactly the value we found in the entry this
494 : * should be race-free in the sense that the LDAP-Server will
495 : * deny the complete operation if somebody changed the
496 : * attribute behind our back. */
497 : /* This will also allow modifying single valued attributes
498 : * in Novell NDS. In NDS you have to first remove attribute and then
499 : * you could add new value */
500 :
501 0 : if (op & LDAP_MOD_BVALUES) {
502 0 : DEBUG(10,("smbldap_make_mod: deleting attribute |%s| blob\n", attribute));
503 0 : smbldap_set_mod_blob(mods, LDAP_MOD_DELETE, attribute, &oldblob);
504 : } else {
505 0 : DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
506 0 : smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
507 : }
508 : }
509 :
510 : /* Regardless of the real operation (add or modify)
511 : we add the new value here. We rely on deleting
512 : the old value, should it exist. */
513 :
514 0 : if (op & LDAP_MOD_BVALUES) {
515 0 : if (newblob && newblob->length) {
516 0 : DEBUG(10,("smbldap_make_mod: adding attribute |%s| blob\n", attribute));
517 0 : smbldap_set_mod_blob(mods, LDAP_MOD_ADD, attribute, newblob);
518 : }
519 : } else {
520 0 : if ((newval != NULL) && (strlen(newval) > 0)) {
521 0 : DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
522 0 : smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
523 : }
524 : }
525 : }
526 :
527 0 : void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
528 : LDAPMod ***mods,
529 : const char *attribute, const char *newval)
530 : {
531 0 : smbldap_make_mod_internal(ldap_struct, existing, mods, attribute,
532 : 0, newval, NULL);
533 0 : }
534 :
535 0 : void smbldap_make_mod_blob(LDAP *ldap_struct, LDAPMessage *existing,
536 : LDAPMod ***mods,
537 : const char *attribute, const DATA_BLOB *newblob)
538 : {
539 0 : smbldap_make_mod_internal(ldap_struct, existing, mods, attribute,
540 : LDAP_MOD_BVALUES, NULL, newblob);
541 0 : }
542 :
543 : /**********************************************************************
544 : Some variants of the LDAP rebind code do not pass in the third 'arg'
545 : pointer to a void*, so we try and work around it by assuming that the
546 : value of the 'LDAP *' pointer is the same as the one we had passed in
547 : **********************************************************************/
548 :
549 : struct smbldap_state_lookup {
550 : LDAP *ld;
551 : struct smbldap_state *smbldap_state;
552 : struct smbldap_state_lookup *prev, *next;
553 : };
554 :
555 : static struct smbldap_state_lookup *smbldap_state_lookup_list;
556 :
557 0 : static struct smbldap_state *smbldap_find_state(LDAP *ld)
558 : {
559 0 : struct smbldap_state_lookup *t;
560 :
561 0 : for (t = smbldap_state_lookup_list; t; t = t->next) {
562 0 : if (t->ld == ld) {
563 0 : return t->smbldap_state;
564 : }
565 : }
566 0 : return NULL;
567 : }
568 :
569 0 : static void smbldap_delete_state(struct smbldap_state *smbldap_state)
570 : {
571 0 : struct smbldap_state_lookup *t;
572 :
573 0 : for (t = smbldap_state_lookup_list; t; t = t->next) {
574 0 : if (t->smbldap_state == smbldap_state) {
575 0 : DLIST_REMOVE(smbldap_state_lookup_list, t);
576 0 : SAFE_FREE(t);
577 0 : return;
578 : }
579 : }
580 : }
581 :
582 0 : static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
583 : {
584 0 : struct smbldap_state *tmp_ldap_state;
585 0 : struct smbldap_state_lookup *t;
586 :
587 0 : if ((tmp_ldap_state = smbldap_find_state(ld))) {
588 0 : SMB_ASSERT(tmp_ldap_state == smbldap_state);
589 0 : return;
590 : }
591 :
592 0 : t = SMB_XMALLOC_P(struct smbldap_state_lookup);
593 0 : ZERO_STRUCTP(t);
594 :
595 0 : DLIST_ADD_END(smbldap_state_lookup_list, t);
596 0 : t->ld = ld;
597 0 : t->smbldap_state = smbldap_state;
598 : }
599 :
600 : /********************************************************************
601 : start TLS on an existing LDAP connection per config
602 : *******************************************************************/
603 :
604 0 : int smbldap_start_tls(LDAP *ldap_struct, int version)
605 : {
606 0 : if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
607 0 : return LDAP_SUCCESS;
608 : }
609 :
610 0 : return smbldap_start_tls_start(ldap_struct, version);
611 : }
612 :
613 : /********************************************************************
614 : start TLS on an existing LDAP connection unconditionally
615 : *******************************************************************/
616 :
617 0 : int smbldap_start_tls_start(LDAP *ldap_struct, int version)
618 : {
619 : #ifdef LDAP_OPT_X_TLS
620 0 : int rc,tls;
621 :
622 : /* check if we use ldaps already */
623 0 : ldap_get_option(ldap_struct, LDAP_OPT_X_TLS, &tls);
624 0 : if (tls == LDAP_OPT_X_TLS_HARD) {
625 0 : return LDAP_SUCCESS;
626 : }
627 :
628 0 : if (version != LDAP_VERSION3) {
629 0 : DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
630 0 : return LDAP_OPERATIONS_ERROR;
631 : }
632 :
633 0 : if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS) {
634 0 : DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
635 : ldap_err2string(rc)));
636 0 : return rc;
637 : }
638 :
639 0 : DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
640 0 : return LDAP_SUCCESS;
641 : #else
642 : DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
643 : return LDAP_OPERATIONS_ERROR;
644 : #endif
645 : }
646 :
647 : /********************************************************************
648 : setup a connection to the LDAP server based on a uri
649 : *******************************************************************/
650 :
651 0 : static int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
652 : {
653 0 : int rc;
654 :
655 0 : DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
656 :
657 : #ifdef HAVE_LDAP_INITIALIZE
658 :
659 0 : rc = ldap_initialize(ldap_struct, uri);
660 0 : if (rc) {
661 0 : DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
662 0 : return rc;
663 : }
664 :
665 0 : if (lp_ldap_follow_referral() != Auto) {
666 0 : rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS,
667 0 : lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF);
668 0 : if (rc != LDAP_SUCCESS)
669 0 : DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n",
670 : ldap_err2string(rc)));
671 : }
672 :
673 : #else
674 :
675 : /* Parse the string manually */
676 :
677 : {
678 : int port = 0;
679 : fstring protocol;
680 : fstring host;
681 : SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
682 :
683 :
684 : /* skip leading "URL:" (if any) */
685 : if ( strnequal( uri, "URL:", 4 ) ) {
686 : uri += 4;
687 : }
688 :
689 : sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
690 :
691 : if (port == 0) {
692 : if (strequal(protocol, "ldap")) {
693 : port = LDAP_PORT;
694 : } else if (strequal(protocol, "ldaps")) {
695 : port = LDAPS_PORT;
696 : } else {
697 : DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
698 : }
699 : }
700 :
701 : if ((*ldap_struct = ldap_init(host, port)) == NULL) {
702 : DEBUG(0, ("ldap_init failed !\n"));
703 : return LDAP_OPERATIONS_ERROR;
704 : }
705 :
706 : if (strequal(protocol, "ldaps")) {
707 : #ifdef LDAP_OPT_X_TLS
708 : int tls = LDAP_OPT_X_TLS_HARD;
709 : if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
710 : {
711 : DEBUG(0, ("Failed to setup a TLS session\n"));
712 : }
713 :
714 : DEBUG(3,("LDAPS option set...!\n"));
715 : #else
716 : DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
717 : return LDAP_OPERATIONS_ERROR;
718 : #endif /* LDAP_OPT_X_TLS */
719 : }
720 : }
721 :
722 : /* now set connection timeout */
723 : #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
724 : {
725 : int ct = lp_ldap_connection_timeout()*1000;
726 : rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
727 : if (rc != LDAP_SUCCESS) {
728 : DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
729 : ct, ldap_err2string(rc)));
730 : }
731 : }
732 : #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
733 : {
734 : struct timeval ct;
735 : ct.tv_usec = 0;
736 : ct.tv_sec = lp_ldap_connection_timeout();
737 : rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
738 : if (rc != LDAP_SUCCESS) {
739 : DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
740 : (int)ct.tv_sec, ldap_err2string(rc)));
741 : }
742 : }
743 : #endif
744 :
745 : #endif /* HAVE_LDAP_INITIALIZE */
746 0 : return LDAP_SUCCESS;
747 : }
748 :
749 : /********************************************************************
750 : try to upgrade to Version 3 LDAP if not already, in either case return current
751 : version
752 : *******************************************************************/
753 :
754 0 : static int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
755 : {
756 0 : int version;
757 0 : int rc;
758 :
759 : /* assume the worst */
760 0 : *new_version = LDAP_VERSION2;
761 :
762 0 : rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
763 0 : if (rc) {
764 0 : return rc;
765 : }
766 :
767 0 : if (version == LDAP_VERSION3) {
768 0 : *new_version = LDAP_VERSION3;
769 0 : return LDAP_SUCCESS;
770 : }
771 :
772 : /* try upgrade */
773 0 : version = LDAP_VERSION3;
774 0 : rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
775 0 : if (rc) {
776 0 : return rc;
777 : }
778 :
779 0 : *new_version = LDAP_VERSION3;
780 0 : return LDAP_SUCCESS;
781 : }
782 :
783 : /*******************************************************************
784 : open a connection to the ldap server (just until the bind)
785 : ******************************************************************/
786 :
787 0 : int smbldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
788 : {
789 0 : int rc, version;
790 :
791 0 : rc = smb_ldap_setup_conn(ldap_struct, uri);
792 0 : if (rc) {
793 0 : return rc;
794 : }
795 :
796 0 : rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
797 0 : if (rc) {
798 0 : return rc;
799 : }
800 :
801 0 : rc = smbldap_start_tls(*ldap_struct, version);
802 0 : if (rc) {
803 0 : return rc;
804 : }
805 :
806 0 : return LDAP_SUCCESS;
807 : }
808 :
809 : /*******************************************************************
810 : open a connection to the ldap server.
811 : ******************************************************************/
812 0 : static int smbldap_open_connection (struct smbldap_state *ldap_state)
813 :
814 : {
815 0 : int rc = LDAP_SUCCESS;
816 0 : int version;
817 0 : int deref;
818 0 : LDAP **ldap_struct = &ldap_state->ldap_struct;
819 :
820 0 : rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
821 0 : if (rc) {
822 0 : return rc;
823 : }
824 :
825 : /* Store the LDAP pointer in a lookup list */
826 :
827 0 : smbldap_store_state(*ldap_struct, ldap_state);
828 :
829 : /* Upgrade to LDAPv3 if possible */
830 :
831 0 : rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
832 0 : if (rc) {
833 0 : return rc;
834 : }
835 :
836 : /* Start TLS if required */
837 :
838 0 : rc = smbldap_start_tls(*ldap_struct, version);
839 0 : if (rc) {
840 0 : return rc;
841 : }
842 :
843 : /* Set alias dereferencing method */
844 0 : deref = lp_ldap_deref();
845 0 : if (deref != -1) {
846 0 : if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) {
847 0 : DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref));
848 : } else {
849 0 : DEBUG(5,("Set dereferencing method: %d\n", deref));
850 : }
851 : }
852 :
853 0 : DEBUG(2, ("smbldap_open_connection: connection opened\n"));
854 0 : return rc;
855 : }
856 :
857 : /*******************************************************************
858 : a rebind function for authenticated referrals
859 : This version takes a void* that we can shove useful stuff in :-)
860 : ******************************************************************/
861 : #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
862 : #else
863 : static int rebindproc_with_state (LDAP * ld, char **whop, char **credp,
864 : int *methodp, int freeit, void *arg)
865 : {
866 : struct smbldap_state *ldap_state = arg;
867 : struct timespec ts;
868 :
869 : /** @TODO Should we be doing something to check what servers we rebind to?
870 : Could we get a referral to a machine that we don't want to give our
871 : username and password to? */
872 :
873 : if (freeit) {
874 : SAFE_FREE(*whop);
875 : if (*credp) {
876 : memset(*credp, '\0', strlen(*credp));
877 : }
878 : SAFE_FREE(*credp);
879 : } else {
880 : DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
881 : ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
882 :
883 : if (ldap_state->anonymous) {
884 : *whop = NULL;
885 : *credp = NULL;
886 : } else {
887 : *whop = SMB_STRDUP(ldap_state->bind_dn);
888 : if (!*whop) {
889 : return LDAP_NO_MEMORY;
890 : }
891 : *credp = SMB_STRDUP(ldap_state->bind_secret);
892 : if (!*credp) {
893 : SAFE_FREE(*whop);
894 : return LDAP_NO_MEMORY;
895 : }
896 : }
897 : *methodp = LDAP_AUTH_SIMPLE;
898 : }
899 :
900 : clock_gettime_mono(&ts);
901 : ldap_state->last_rebind = convert_timespec_to_timeval(ts);
902 :
903 : return 0;
904 : }
905 : #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
906 :
907 : /*******************************************************************
908 : a rebind function for authenticated referrals
909 : This version takes a void* that we can shove useful stuff in :-)
910 : and actually does the connection.
911 : ******************************************************************/
912 : #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
913 0 : static int rebindproc_connect_with_state (LDAP *ldap_struct,
914 : LDAP_CONST char *url,
915 : ber_tag_t request,
916 : ber_int_t msgid, void *arg)
917 : {
918 0 : struct smbldap_state *ldap_state =
919 : (struct smbldap_state *)arg;
920 0 : int rc;
921 0 : struct timespec ts;
922 0 : int version;
923 :
924 0 : DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
925 : url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
926 :
927 : /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
928 : * itself) before rebinding to another LDAP server to avoid to expose
929 : * our credentials. At least *try* to secure the connection - Guenther */
930 :
931 0 : smb_ldap_upgrade_conn(ldap_struct, &version);
932 0 : smbldap_start_tls(ldap_struct, version);
933 :
934 : /** @TODO Should we be doing something to check what servers we rebind to?
935 : Could we get a referral to a machine that we don't want to give our
936 : username and password to? */
937 :
938 0 : rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
939 :
940 : /* only set the last rebind timestamp when we did rebind after a
941 : * non-read LDAP operation. That way we avoid the replication sleep
942 : * after a simple redirected search operation - Guenther */
943 :
944 0 : switch (request) {
945 :
946 0 : case LDAP_REQ_MODIFY:
947 : case LDAP_REQ_ADD:
948 : case LDAP_REQ_DELETE:
949 : case LDAP_REQ_MODDN:
950 : case LDAP_REQ_EXTENDED:
951 0 : DEBUG(10,("rebindproc_connect_with_state: "
952 : "setting last_rebind timestamp "
953 : "(req: 0x%02x)\n", (unsigned int)request));
954 0 : clock_gettime_mono(&ts);
955 0 : ldap_state->last_rebind = convert_timespec_to_timeval(ts);
956 0 : break;
957 0 : default:
958 0 : ZERO_STRUCT(ldap_state->last_rebind);
959 0 : break;
960 : }
961 :
962 0 : return rc;
963 : }
964 : #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
965 :
966 : /*******************************************************************
967 : Add a rebind function for authenticated referrals
968 : ******************************************************************/
969 : #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
970 : #else
971 : # if LDAP_SET_REBIND_PROC_ARGS == 2
972 : static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
973 : int *method, int freeit )
974 : {
975 : struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
976 :
977 : return rebindproc_with_state(ldap_struct, whop, credp,
978 : method, freeit, ldap_state);
979 : }
980 : # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
981 : #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
982 :
983 : /*******************************************************************
984 : a rebind function for authenticated referrals
985 : this also does the connection, but no void*.
986 : ******************************************************************/
987 : #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
988 : # if LDAP_SET_REBIND_PROC_ARGS == 2
989 : static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
990 : ber_int_t msgid)
991 : {
992 : struct smbldap_state *ldap_state = smbldap_find_state(ld);
993 :
994 : return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
995 : ldap_state);
996 : }
997 : # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
998 : #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
999 :
1000 : /*******************************************************************
1001 : connect to the ldap server under system privilege.
1002 : ******************************************************************/
1003 0 : static int smbldap_connect_system(struct smbldap_state *ldap_state)
1004 : {
1005 0 : LDAP *ldap_struct = smbldap_get_ldap(ldap_state);
1006 0 : int rc;
1007 0 : int version;
1008 :
1009 : /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
1010 : (OpenLDAP) doesn't seem to support it */
1011 :
1012 0 : DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1013 : ldap_state->uri, ldap_state->bind_dn));
1014 :
1015 : #ifdef HAVE_LDAP_SET_REBIND_PROC
1016 : #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1017 : # if LDAP_SET_REBIND_PROC_ARGS == 2
1018 : ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
1019 : # endif
1020 : # if LDAP_SET_REBIND_PROC_ARGS == 3
1021 0 : ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
1022 : # endif
1023 : #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1024 : # if LDAP_SET_REBIND_PROC_ARGS == 2
1025 : ldap_set_rebind_proc(ldap_struct, &rebindproc);
1026 : # endif
1027 : # if LDAP_SET_REBIND_PROC_ARGS == 3
1028 : ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
1029 : # endif
1030 : #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1031 : #endif
1032 :
1033 : /* When there is an alternative bind callback is set,
1034 : attempt to use it to perform the bind */
1035 0 : if (ldap_state->bind_callback != NULL) {
1036 : /* We have to allow bind callback to be run under become_root/unbecome_root
1037 : to make sure within smbd the callback has proper write access to its resources,
1038 : like credential cache. This is similar to passdb case where this callback is supposed
1039 : to be used. When used outside smbd, become_root()/unbecome_root() are no-op.
1040 : */
1041 0 : become_root();
1042 0 : rc = ldap_state->bind_callback(ldap_struct, ldap_state, ldap_state->bind_callback_data);
1043 0 : unbecome_root();
1044 : } else {
1045 0 : rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1046 : }
1047 :
1048 0 : if (rc != LDAP_SUCCESS) {
1049 0 : char *ld_error = NULL;
1050 0 : ldap_get_option(smbldap_get_ldap(ldap_state),
1051 : LDAP_OPT_ERROR_STRING,
1052 : &ld_error);
1053 0 : DEBUG(ldap_state->num_failures ? 2 : 0,
1054 : ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1055 : ldap_state->uri,
1056 : ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1057 : ldap_err2string(rc),
1058 : ld_error ? ld_error : "(unknown)"));
1059 0 : SAFE_FREE(ld_error);
1060 0 : ldap_state->num_failures++;
1061 0 : goto done;
1062 : }
1063 :
1064 0 : ldap_state->num_failures = 0;
1065 0 : ldap_state->paged_results = False;
1066 :
1067 0 : ldap_get_option(smbldap_get_ldap(ldap_state),
1068 : LDAP_OPT_PROTOCOL_VERSION, &version);
1069 :
1070 0 : if (smbldap_has_control(smbldap_get_ldap(ldap_state), ADS_PAGE_CTL_OID)
1071 0 : && version == 3) {
1072 0 : ldap_state->paged_results = True;
1073 : }
1074 :
1075 0 : DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1076 0 : DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1077 : ldap_state->paged_results ? "does" : "does not"));
1078 0 : done:
1079 0 : if (rc != 0) {
1080 0 : ldap_unbind(ldap_struct);
1081 0 : ldap_state->ldap_struct = NULL;
1082 : }
1083 0 : return rc;
1084 : }
1085 :
1086 : static void smbldap_idle_fn(struct tevent_context *tevent_ctx,
1087 : struct tevent_timer *te,
1088 : struct timeval now_abs,
1089 : void *private_data);
1090 :
1091 : /**********************************************************************
1092 : Connect to LDAP server (called before every ldap operation)
1093 : *********************************************************************/
1094 0 : static int smbldap_open(struct smbldap_state *ldap_state)
1095 : {
1096 0 : int rc, opt_rc;
1097 0 : bool reopen = False;
1098 0 : SMB_ASSERT(ldap_state);
1099 :
1100 0 : if ((smbldap_get_ldap(ldap_state) != NULL) &&
1101 0 : ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) <
1102 0 : time_mono(NULL))) {
1103 :
1104 : #ifdef HAVE_UNIXSOCKET
1105 0 : struct sockaddr_un addr;
1106 : #else
1107 : struct sockaddr_storage addr;
1108 : #endif
1109 0 : socklen_t len = sizeof(addr);
1110 0 : int sd;
1111 :
1112 0 : opt_rc = ldap_get_option(smbldap_get_ldap(ldap_state),
1113 : LDAP_OPT_DESC, &sd);
1114 0 : if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1115 0 : reopen = True;
1116 :
1117 : #ifdef HAVE_UNIXSOCKET
1118 0 : if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1119 0 : reopen = True;
1120 : #endif
1121 0 : if (reopen) {
1122 : /* the other end has died. reopen. */
1123 0 : ldap_unbind(smbldap_get_ldap(ldap_state));
1124 0 : ldap_state->ldap_struct = NULL;
1125 0 : ldap_state->last_ping = (time_t)0;
1126 : } else {
1127 0 : ldap_state->last_ping = time_mono(NULL);
1128 : }
1129 : }
1130 :
1131 0 : if (smbldap_get_ldap(ldap_state) != NULL) {
1132 0 : DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1133 0 : return LDAP_SUCCESS;
1134 : }
1135 :
1136 0 : if ((rc = smbldap_open_connection(ldap_state))) {
1137 0 : return rc;
1138 : }
1139 :
1140 0 : if ((rc = smbldap_connect_system(ldap_state))) {
1141 0 : return rc;
1142 : }
1143 :
1144 :
1145 0 : ldap_state->last_ping = time_mono(NULL);
1146 0 : ldap_state->pid = getpid();
1147 :
1148 0 : TALLOC_FREE(ldap_state->idle_event);
1149 :
1150 0 : if (ldap_state->tevent_context != NULL) {
1151 0 : ldap_state->idle_event = tevent_add_timer(
1152 : ldap_state->tevent_context, ldap_state,
1153 : timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1154 : smbldap_idle_fn, ldap_state);
1155 : }
1156 :
1157 0 : DEBUG(4,("The LDAP server is successfully connected\n"));
1158 :
1159 0 : return LDAP_SUCCESS;
1160 : }
1161 :
1162 : /**********************************************************************
1163 : Disconnect from LDAP server
1164 : *********************************************************************/
1165 0 : static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1166 : {
1167 0 : if (!ldap_state)
1168 0 : return NT_STATUS_INVALID_PARAMETER;
1169 :
1170 0 : if (smbldap_get_ldap(ldap_state) != NULL) {
1171 0 : ldap_unbind(smbldap_get_ldap(ldap_state));
1172 0 : ldap_state->ldap_struct = NULL;
1173 : }
1174 :
1175 0 : smbldap_delete_state(ldap_state);
1176 :
1177 0 : TALLOC_FREE(ldap_state->idle_event);
1178 :
1179 0 : DEBUG(5,("The connection to the LDAP server was closed\n"));
1180 : /* maybe free the results here --metze */
1181 :
1182 0 : return NT_STATUS_OK;
1183 : }
1184 :
1185 : static SIG_ATOMIC_T got_alarm;
1186 :
1187 0 : static void gotalarm_sig(int dummy)
1188 : {
1189 0 : got_alarm = 1;
1190 0 : }
1191 :
1192 0 : static time_t calc_ldap_abs_endtime(int ldap_to)
1193 : {
1194 0 : if (ldap_to == 0) {
1195 : /* No timeout - don't
1196 : return a value for
1197 : the alarm. */
1198 0 : return (time_t)0;
1199 : }
1200 :
1201 : /* Make the alarm time one second beyond
1202 : the timeout we're setting for the
1203 : remote search timeout, to allow that
1204 : to fire in preference. */
1205 :
1206 0 : return time_mono(NULL)+ldap_to+1;
1207 : }
1208 :
1209 0 : static int end_ldap_local_alarm(time_t absolute_endtime, int rc)
1210 : {
1211 0 : if (absolute_endtime) {
1212 0 : alarm(0);
1213 0 : CatchSignal(SIGALRM, SIG_IGN);
1214 0 : if (got_alarm) {
1215 : /* Client timeout error code. */
1216 0 : got_alarm = 0;
1217 0 : return LDAP_TIMEOUT;
1218 : }
1219 : }
1220 0 : return rc;
1221 : }
1222 :
1223 0 : static void setup_ldap_local_alarm(struct smbldap_state *ldap_state, time_t absolute_endtime)
1224 : {
1225 0 : time_t now = time_mono(NULL);
1226 :
1227 0 : if (absolute_endtime) {
1228 0 : got_alarm = 0;
1229 0 : CatchSignal(SIGALRM, gotalarm_sig);
1230 0 : alarm(absolute_endtime - now);
1231 : }
1232 :
1233 0 : if (ldap_state->pid != getpid()) {
1234 0 : smbldap_close(ldap_state);
1235 : }
1236 0 : }
1237 :
1238 0 : static void get_ldap_errs(struct smbldap_state *ldap_state, char **pp_ld_error, int *p_ld_errno)
1239 : {
1240 0 : ldap_get_option(smbldap_get_ldap(ldap_state),
1241 : LDAP_OPT_ERROR_NUMBER, p_ld_errno);
1242 :
1243 0 : ldap_get_option(smbldap_get_ldap(ldap_state),
1244 : LDAP_OPT_ERROR_STRING, pp_ld_error);
1245 0 : }
1246 :
1247 0 : static int get_cached_ldap_connect(struct smbldap_state *ldap_state, time_t abs_endtime)
1248 : {
1249 0 : int attempts = 0;
1250 :
1251 0 : while (1) {
1252 0 : int rc;
1253 0 : time_t now;
1254 :
1255 0 : now = time_mono(NULL);
1256 0 : ldap_state->last_use = now;
1257 :
1258 0 : if (abs_endtime && now > abs_endtime) {
1259 0 : smbldap_close(ldap_state);
1260 0 : return LDAP_TIMEOUT;
1261 : }
1262 :
1263 0 : rc = smbldap_open(ldap_state);
1264 :
1265 0 : if (rc == LDAP_SUCCESS) {
1266 0 : return LDAP_SUCCESS;
1267 : }
1268 :
1269 0 : attempts++;
1270 0 : DEBUG(1, ("Connection to LDAP server failed for the "
1271 : "%d try!\n", attempts));
1272 :
1273 0 : if (rc == LDAP_INSUFFICIENT_ACCESS) {
1274 : /* The fact that we are non-root or any other
1275 : * access-denied condition will not change in the next
1276 : * round of trying */
1277 0 : return rc;
1278 : }
1279 :
1280 0 : if (got_alarm) {
1281 0 : smbldap_close(ldap_state);
1282 0 : return LDAP_TIMEOUT;
1283 : }
1284 :
1285 0 : smb_msleep(1000);
1286 :
1287 0 : if (got_alarm) {
1288 0 : smbldap_close(ldap_state);
1289 0 : return LDAP_TIMEOUT;
1290 : }
1291 : }
1292 : }
1293 :
1294 : /*********************************************************************
1295 : ********************************************************************/
1296 :
1297 0 : static int smbldap_search_ext(struct smbldap_state *ldap_state,
1298 : const char *base, int scope, const char *filter,
1299 : const char *attrs[], int attrsonly,
1300 : LDAPControl **sctrls, LDAPControl **cctrls,
1301 : int sizelimit, LDAPMessage **res)
1302 : {
1303 0 : int rc = LDAP_SERVER_DOWN;
1304 0 : char *utf8_filter;
1305 0 : int to = lp_ldap_timeout();
1306 0 : time_t abs_endtime = calc_ldap_abs_endtime(to);
1307 0 : struct timeval timeout;
1308 0 : struct timeval *timeout_ptr = NULL;
1309 0 : size_t converted_size;
1310 :
1311 0 : SMB_ASSERT(ldap_state);
1312 :
1313 0 : DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1314 : "scope => [%d]\n", base, filter, scope));
1315 :
1316 0 : if (ldap_state->last_rebind.tv_sec > 0) {
1317 0 : struct timeval tval;
1318 0 : struct timespec ts;
1319 0 : int64_t tdiff = 0;
1320 0 : int sleep_time = 0;
1321 :
1322 0 : clock_gettime_mono(&ts);
1323 0 : tval = convert_timespec_to_timeval(ts);
1324 :
1325 0 : tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1326 0 : tdiff /= 1000; /* Convert to milliseconds. */
1327 :
1328 0 : sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1329 0 : sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1330 :
1331 0 : if (sleep_time > 0) {
1332 : /* we wait for the LDAP replication */
1333 0 : DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1334 : "for LDAP replication.\n",sleep_time));
1335 0 : smb_msleep(sleep_time);
1336 0 : DEBUG(5,("smbldap_search_ext: go on!\n"));
1337 : }
1338 0 : ZERO_STRUCT(ldap_state->last_rebind);
1339 : }
1340 :
1341 0 : if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1342 0 : return LDAP_NO_MEMORY;
1343 : }
1344 :
1345 : /* Setup remote timeout for the ldap_search_ext_s call. */
1346 0 : if (to) {
1347 0 : timeout.tv_sec = to;
1348 0 : timeout.tv_usec = 0;
1349 0 : timeout_ptr = &timeout;
1350 : }
1351 :
1352 0 : setup_ldap_local_alarm(ldap_state, abs_endtime);
1353 :
1354 0 : while (1) {
1355 0 : char *ld_error = NULL;
1356 0 : int ld_errno;
1357 :
1358 0 : rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1359 0 : if (rc != LDAP_SUCCESS) {
1360 0 : break;
1361 : }
1362 :
1363 0 : rc = ldap_search_ext_s(smbldap_get_ldap(ldap_state),
1364 : base, scope,
1365 : utf8_filter,
1366 : discard_const_p(char *, attrs),
1367 : attrsonly, sctrls, cctrls, timeout_ptr,
1368 : sizelimit, res);
1369 0 : if (rc == LDAP_SUCCESS) {
1370 0 : break;
1371 : }
1372 :
1373 0 : get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1374 :
1375 0 : DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1376 : "(%s)\n", base, ld_errno,
1377 : ldap_err2string(rc),
1378 : ld_error ? ld_error : "unknown"));
1379 0 : SAFE_FREE(ld_error);
1380 :
1381 0 : if (ld_errno != LDAP_SERVER_DOWN) {
1382 0 : break;
1383 : }
1384 0 : ldap_unbind(smbldap_get_ldap(ldap_state));
1385 0 : ldap_state->ldap_struct = NULL;
1386 : }
1387 :
1388 0 : TALLOC_FREE(utf8_filter);
1389 0 : return end_ldap_local_alarm(abs_endtime, rc);
1390 : }
1391 :
1392 0 : int smbldap_search(struct smbldap_state *ldap_state,
1393 : const char *base, int scope, const char *filter,
1394 : const char *attrs[], int attrsonly,
1395 : LDAPMessage **res)
1396 : {
1397 0 : return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1398 : attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1399 : }
1400 :
1401 0 : int smbldap_search_paged(struct smbldap_state *ldap_state,
1402 : const char *base, int scope, const char *filter,
1403 : const char **attrs, int attrsonly, int pagesize,
1404 : LDAPMessage **res, void **cookie)
1405 : {
1406 0 : LDAPControl pr;
1407 0 : LDAPControl **rcontrols;
1408 0 : LDAPControl *controls[2] = { NULL, NULL};
1409 0 : BerElement *cookie_be = NULL;
1410 0 : struct berval *cookie_bv = NULL;
1411 0 : int tmp = 0, i, rc;
1412 0 : bool critical = True;
1413 :
1414 0 : *res = NULL;
1415 :
1416 0 : DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1417 : "scope => [%d], pagesize => [%d]\n",
1418 : base, filter, scope, pagesize));
1419 :
1420 0 : cookie_be = ber_alloc_t(LBER_USE_DER);
1421 0 : if (cookie_be == NULL) {
1422 0 : DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1423 : "NULL\n"));
1424 0 : return LDAP_NO_MEMORY;
1425 : }
1426 :
1427 : /* construct cookie */
1428 0 : if (*cookie != NULL) {
1429 0 : ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1430 0 : ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1431 0 : *cookie = NULL;
1432 : } else {
1433 0 : ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1434 : }
1435 0 : ber_flatten(cookie_be, &cookie_bv);
1436 :
1437 0 : pr.ldctl_oid = discard_const_p(char, ADS_PAGE_CTL_OID);
1438 0 : pr.ldctl_iscritical = (char) critical;
1439 0 : pr.ldctl_value.bv_len = cookie_bv->bv_len;
1440 0 : pr.ldctl_value.bv_val = cookie_bv->bv_val;
1441 :
1442 0 : controls[0] = ≺
1443 0 : controls[1] = NULL;
1444 :
1445 0 : rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1446 : 0, controls, NULL, LDAP_NO_LIMIT, res);
1447 :
1448 0 : ber_free(cookie_be, 1);
1449 0 : ber_bvfree(cookie_bv);
1450 :
1451 0 : if (rc != 0) {
1452 0 : DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1453 : "failed with [%s]\n", filter, ldap_err2string(rc)));
1454 0 : goto done;
1455 : }
1456 :
1457 0 : DEBUG(3,("smbldap_search_paged: search was successful\n"));
1458 :
1459 0 : rc = ldap_parse_result(smbldap_get_ldap(ldap_state), *res, NULL, NULL,
1460 : NULL, NULL, &rcontrols, 0);
1461 0 : if (rc != 0) {
1462 0 : DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1463 : "with [%s]\n", ldap_err2string(rc)));
1464 0 : goto done;
1465 : }
1466 :
1467 0 : if (rcontrols == NULL)
1468 0 : goto done;
1469 :
1470 0 : for (i=0; rcontrols[i]; i++) {
1471 :
1472 0 : if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1473 0 : continue;
1474 :
1475 0 : cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1476 0 : ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1477 : /* the berval is the cookie, but must be freed when it is all
1478 : done */
1479 0 : if (cookie_bv->bv_len)
1480 0 : *cookie=ber_bvdup(cookie_bv);
1481 : else
1482 0 : *cookie=NULL;
1483 0 : ber_bvfree(cookie_bv);
1484 0 : ber_free(cookie_be, 1);
1485 0 : break;
1486 : }
1487 0 : ldap_controls_free(rcontrols);
1488 0 : done:
1489 0 : return rc;
1490 : }
1491 :
1492 0 : int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1493 : {
1494 0 : int rc = LDAP_SERVER_DOWN;
1495 0 : char *utf8_dn;
1496 0 : time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1497 0 : size_t converted_size;
1498 :
1499 0 : SMB_ASSERT(ldap_state);
1500 :
1501 0 : DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1502 :
1503 0 : if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1504 0 : return LDAP_NO_MEMORY;
1505 : }
1506 :
1507 0 : setup_ldap_local_alarm(ldap_state, abs_endtime);
1508 :
1509 0 : while (1) {
1510 0 : char *ld_error = NULL;
1511 0 : int ld_errno;
1512 :
1513 0 : rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1514 0 : if (rc != LDAP_SUCCESS) {
1515 0 : break;
1516 : }
1517 :
1518 0 : rc = ldap_modify_s(smbldap_get_ldap(ldap_state), utf8_dn,
1519 : attrs);
1520 0 : if (rc == LDAP_SUCCESS) {
1521 0 : break;
1522 : }
1523 :
1524 0 : get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1525 :
1526 0 : DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1527 : "(%s)\n", dn, ld_errno,
1528 : ldap_err2string(rc),
1529 : ld_error ? ld_error : "unknown"));
1530 0 : SAFE_FREE(ld_error);
1531 :
1532 0 : if (ld_errno != LDAP_SERVER_DOWN) {
1533 0 : break;
1534 : }
1535 0 : ldap_unbind(smbldap_get_ldap(ldap_state));
1536 0 : ldap_state->ldap_struct = NULL;
1537 : }
1538 :
1539 0 : TALLOC_FREE(utf8_dn);
1540 0 : return end_ldap_local_alarm(abs_endtime, rc);
1541 : }
1542 :
1543 0 : int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1544 : {
1545 0 : int rc = LDAP_SERVER_DOWN;
1546 0 : char *utf8_dn;
1547 0 : time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1548 0 : size_t converted_size;
1549 :
1550 0 : SMB_ASSERT(ldap_state);
1551 :
1552 0 : DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1553 :
1554 0 : if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1555 0 : return LDAP_NO_MEMORY;
1556 : }
1557 :
1558 0 : setup_ldap_local_alarm(ldap_state, abs_endtime);
1559 :
1560 0 : while (1) {
1561 0 : char *ld_error = NULL;
1562 0 : int ld_errno;
1563 :
1564 0 : rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1565 0 : if (rc != LDAP_SUCCESS) {
1566 0 : break;
1567 : }
1568 :
1569 0 : rc = ldap_add_s(smbldap_get_ldap(ldap_state), utf8_dn, attrs);
1570 0 : if (rc == LDAP_SUCCESS) {
1571 0 : break;
1572 : }
1573 :
1574 0 : get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1575 :
1576 0 : DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1577 : "(%s)\n", dn, ld_errno,
1578 : ldap_err2string(rc),
1579 : ld_error ? ld_error : "unknown"));
1580 0 : SAFE_FREE(ld_error);
1581 :
1582 0 : if (ld_errno != LDAP_SERVER_DOWN) {
1583 0 : break;
1584 : }
1585 0 : ldap_unbind(smbldap_get_ldap(ldap_state));
1586 0 : ldap_state->ldap_struct = NULL;
1587 : }
1588 :
1589 0 : TALLOC_FREE(utf8_dn);
1590 0 : return end_ldap_local_alarm(abs_endtime, rc);
1591 : }
1592 :
1593 0 : int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1594 : {
1595 0 : int rc = LDAP_SERVER_DOWN;
1596 0 : char *utf8_dn;
1597 0 : time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1598 0 : size_t converted_size;
1599 :
1600 0 : SMB_ASSERT(ldap_state);
1601 :
1602 0 : DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1603 :
1604 0 : if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1605 0 : return LDAP_NO_MEMORY;
1606 : }
1607 :
1608 0 : setup_ldap_local_alarm(ldap_state, abs_endtime);
1609 :
1610 0 : while (1) {
1611 0 : char *ld_error = NULL;
1612 0 : int ld_errno;
1613 :
1614 0 : rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1615 0 : if (rc != LDAP_SUCCESS) {
1616 0 : break;
1617 : }
1618 :
1619 0 : rc = ldap_delete_s(smbldap_get_ldap(ldap_state), utf8_dn);
1620 0 : if (rc == LDAP_SUCCESS) {
1621 0 : break;
1622 : }
1623 :
1624 0 : get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1625 :
1626 0 : DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1627 : "(%s)\n", dn, ld_errno,
1628 : ldap_err2string(rc),
1629 : ld_error ? ld_error : "unknown"));
1630 0 : SAFE_FREE(ld_error);
1631 :
1632 0 : if (ld_errno != LDAP_SERVER_DOWN) {
1633 0 : break;
1634 : }
1635 0 : ldap_unbind(smbldap_get_ldap(ldap_state));
1636 0 : ldap_state->ldap_struct = NULL;
1637 : }
1638 :
1639 0 : TALLOC_FREE(utf8_dn);
1640 0 : return end_ldap_local_alarm(abs_endtime, rc);
1641 : }
1642 :
1643 0 : int smbldap_extended_operation(struct smbldap_state *ldap_state,
1644 : LDAP_CONST char *reqoid, struct berval *reqdata,
1645 : LDAPControl **serverctrls, LDAPControl **clientctrls,
1646 : char **retoidp, struct berval **retdatap)
1647 : {
1648 0 : int rc = LDAP_SERVER_DOWN;
1649 0 : time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1650 :
1651 0 : if (!ldap_state)
1652 0 : return (-1);
1653 :
1654 0 : setup_ldap_local_alarm(ldap_state, abs_endtime);
1655 :
1656 0 : while (1) {
1657 0 : char *ld_error = NULL;
1658 0 : int ld_errno;
1659 :
1660 0 : rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1661 0 : if (rc != LDAP_SUCCESS) {
1662 0 : break;
1663 : }
1664 :
1665 0 : rc = ldap_extended_operation_s(smbldap_get_ldap(ldap_state),
1666 : reqoid,
1667 : reqdata, serverctrls,
1668 : clientctrls, retoidp, retdatap);
1669 0 : if (rc == LDAP_SUCCESS) {
1670 0 : break;
1671 : }
1672 :
1673 0 : get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1674 :
1675 0 : DEBUG(10, ("Extended operation failed with error: "
1676 : "%d (%s) (%s)\n", ld_errno,
1677 : ldap_err2string(rc),
1678 : ld_error ? ld_error : "unknown"));
1679 0 : SAFE_FREE(ld_error);
1680 :
1681 0 : if (ld_errno != LDAP_SERVER_DOWN) {
1682 0 : break;
1683 : }
1684 0 : ldap_unbind(smbldap_get_ldap(ldap_state));
1685 0 : ldap_state->ldap_struct = NULL;
1686 : }
1687 :
1688 0 : return end_ldap_local_alarm(abs_endtime, rc);
1689 : }
1690 :
1691 : /*******************************************************************
1692 : run the search by name.
1693 : ******************************************************************/
1694 0 : int smbldap_search_suffix (struct smbldap_state *ldap_state,
1695 : const char *filter, const char **search_attr,
1696 : LDAPMessage ** result)
1697 : {
1698 0 : return smbldap_search(ldap_state, lp_ldap_suffix(),
1699 : LDAP_SCOPE_SUBTREE,
1700 : filter, search_attr, 0, result);
1701 : }
1702 :
1703 0 : static void smbldap_idle_fn(struct tevent_context *tevent_ctx,
1704 : struct tevent_timer *te,
1705 : struct timeval now_abs,
1706 : void *private_data)
1707 : {
1708 0 : struct smbldap_state *state = (struct smbldap_state *)private_data;
1709 :
1710 0 : TALLOC_FREE(state->idle_event);
1711 :
1712 0 : if (smbldap_get_ldap(state) == NULL) {
1713 0 : DEBUG(10,("ldap connection not connected...\n"));
1714 0 : return;
1715 : }
1716 :
1717 0 : if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) {
1718 0 : DEBUG(10,("ldap connection not idle...\n"));
1719 :
1720 : /* this needs to be made monotonic clock aware inside tevent: */
1721 0 : state->idle_event = tevent_add_timer(
1722 : tevent_ctx, state,
1723 : timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0),
1724 : smbldap_idle_fn,
1725 : private_data);
1726 0 : return;
1727 : }
1728 :
1729 0 : DEBUG(7,("ldap connection idle...closing connection\n"));
1730 0 : smbldap_close(state);
1731 : }
1732 :
1733 : /**********************************************************************
1734 : Housekeeping
1735 : *********************************************************************/
1736 :
1737 0 : void smbldap_free_struct(struct smbldap_state **ldap_state)
1738 : {
1739 0 : smbldap_close(*ldap_state);
1740 :
1741 0 : if ((*ldap_state)->bind_secret) {
1742 0 : memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1743 : }
1744 :
1745 0 : SAFE_FREE((*ldap_state)->bind_dn);
1746 0 : BURN_FREE_STR((*ldap_state)->bind_secret);
1747 0 : smbldap_set_bind_callback(*ldap_state, NULL, NULL);
1748 :
1749 0 : TALLOC_FREE(*ldap_state);
1750 :
1751 : /* No need to free any further, as it is talloc()ed */
1752 0 : }
1753 :
1754 0 : static int smbldap_state_destructor(struct smbldap_state *state)
1755 : {
1756 0 : smbldap_free_struct(&state);
1757 0 : return 0;
1758 : }
1759 :
1760 :
1761 : /**********************************************************************
1762 : Initialise the 'general' ldap structures, on which ldap operations may be conducted
1763 : *********************************************************************/
1764 :
1765 0 : NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct tevent_context *tevent_ctx,
1766 : const char *location,
1767 : bool anon,
1768 : const char *bind_dn,
1769 : const char *bind_secret,
1770 : struct smbldap_state **smbldap_state)
1771 : {
1772 0 : *smbldap_state = talloc_zero(mem_ctx, struct smbldap_state);
1773 0 : if (!*smbldap_state) {
1774 0 : DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1775 0 : return NT_STATUS_NO_MEMORY;
1776 : }
1777 :
1778 0 : if (location) {
1779 0 : (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1780 : } else {
1781 0 : (*smbldap_state)->uri = "ldap://localhost";
1782 : }
1783 :
1784 0 : (*smbldap_state)->tevent_context = tevent_ctx;
1785 :
1786 0 : if (bind_dn && bind_secret) {
1787 0 : smbldap_set_creds(*smbldap_state, anon, bind_dn, bind_secret);
1788 : }
1789 :
1790 0 : talloc_set_destructor(*smbldap_state, smbldap_state_destructor);
1791 0 : return NT_STATUS_OK;
1792 : }
1793 :
1794 0 : char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1795 : LDAPMessage *entry)
1796 : {
1797 0 : char *utf8_dn, *unix_dn;
1798 0 : size_t converted_size;
1799 :
1800 0 : utf8_dn = ldap_get_dn(ld, entry);
1801 0 : if (!utf8_dn) {
1802 0 : DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1803 0 : return NULL;
1804 : }
1805 0 : if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1806 0 : DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1807 : "[%s]\n", utf8_dn));
1808 0 : return NULL;
1809 : }
1810 0 : ldap_memfree(utf8_dn);
1811 0 : return unix_dn;
1812 : }
1813 :
1814 : /*******************************************************************
1815 : Check if root-dse has a certain Control or Extension
1816 : ********************************************************************/
1817 :
1818 0 : static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1819 : {
1820 0 : LDAPMessage *msg = NULL;
1821 0 : LDAPMessage *entry = NULL;
1822 0 : char **values = NULL;
1823 0 : int rc, num_result, num_values, i;
1824 0 : bool result = False;
1825 :
1826 0 : if (!attrs[0]) {
1827 0 : DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1828 0 : return False;
1829 : }
1830 :
1831 0 : if (!strequal(attrs[0], "supportedExtension") &&
1832 0 : !strequal(attrs[0], "supportedControl") &&
1833 0 : !strequal(attrs[0], "namingContexts")) {
1834 0 : DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1835 0 : return False;
1836 : }
1837 :
1838 0 : rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1839 : "(objectclass=*)", discard_const_p(char *, attrs), 0 , &msg);
1840 :
1841 0 : if (rc != LDAP_SUCCESS) {
1842 0 : DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1843 0 : return False;
1844 : }
1845 :
1846 0 : num_result = ldap_count_entries(ld, msg);
1847 :
1848 0 : if (num_result != 1) {
1849 0 : DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1850 0 : goto done;
1851 : }
1852 :
1853 0 : entry = ldap_first_entry(ld, msg);
1854 :
1855 0 : if (entry == NULL) {
1856 0 : DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1857 0 : goto done;
1858 : }
1859 :
1860 0 : values = ldap_get_values(ld, entry, attrs[0]);
1861 :
1862 0 : if (values == NULL) {
1863 0 : DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1864 0 : goto done;
1865 : }
1866 :
1867 0 : num_values = ldap_count_values(values);
1868 :
1869 0 : if (num_values == 0) {
1870 0 : DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1871 0 : goto done;
1872 : }
1873 :
1874 0 : for (i=0; i<num_values; i++) {
1875 0 : if (strcmp(values[i], value) == 0)
1876 0 : result = True;
1877 : }
1878 :
1879 :
1880 0 : done:
1881 0 : if (values != NULL)
1882 0 : ldap_value_free(values);
1883 0 : if (msg != NULL)
1884 0 : ldap_msgfree(msg);
1885 :
1886 0 : return result;
1887 :
1888 : }
1889 :
1890 : /*******************************************************************
1891 : Check if LDAP-Server supports a certain Control (OID in string format)
1892 : ********************************************************************/
1893 :
1894 0 : bool smbldap_has_control(LDAP *ld, const char *control)
1895 : {
1896 0 : const char *attrs[] = { "supportedControl", NULL };
1897 0 : return smbldap_check_root_dse(ld, attrs, control);
1898 : }
1899 :
1900 : /*******************************************************************
1901 : Check if LDAP-Server supports a certain Extension (OID in string format)
1902 : ********************************************************************/
1903 :
1904 0 : bool smbldap_has_extension(LDAP *ld, const char *extension)
1905 : {
1906 0 : const char *attrs[] = { "supportedExtension", NULL };
1907 0 : return smbldap_check_root_dse(ld, attrs, extension);
1908 : }
1909 :
1910 : /*******************************************************************
1911 : Check if LDAP-Server holds a given namingContext
1912 : ********************************************************************/
1913 :
1914 0 : bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1915 : {
1916 0 : const char *attrs[] = { "namingContexts", NULL };
1917 0 : return smbldap_check_root_dse(ld, attrs, naming_context);
1918 : }
1919 :
1920 0 : bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1921 : {
1922 0 : ldap_state->anonymous = anon;
1923 :
1924 : /* free any previously set credential */
1925 :
1926 0 : SAFE_FREE(ldap_state->bind_dn);
1927 0 : smbldap_set_bind_callback(ldap_state, NULL, NULL);
1928 :
1929 0 : if (ldap_state->bind_secret) {
1930 : /* make sure secrets are zeroed out of memory */
1931 0 : memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1932 0 : SAFE_FREE(ldap_state->bind_secret);
1933 : }
1934 :
1935 0 : if ( ! anon) {
1936 0 : ldap_state->bind_dn = SMB_STRDUP(dn);
1937 0 : ldap_state->bind_secret = SMB_STRDUP(secret);
1938 : }
1939 :
1940 0 : return True;
1941 : }
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