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s3: Update waf build to include missed dependancy on Lion.
[Samba/gebeck_regimport.git] / source3 / lib / smbldap.c
blob51bcabd5ebf58784b0d0da9b2b3b70e74ac16f92
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
30 /* Try not to hit the up or down server forever */
31
32 #define SMBLDAP_DONT_PING_TIME 10 /* ping only all 10 seconds */
33 #define SMBLDAP_NUM_RETRIES 8 /* retry only 8 times */
34
35 #define SMBLDAP_IDLE_TIME 150 /* After 2.5 minutes disconnect */
36
37
38 /*******************************************************************
39 Search an attribute and return the first value found.
40 ******************************************************************/
41
42 bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
43 const char *attribute, char *value,
44 int max_len)
45 {
46 char **values;
47 size_t size = 0;
48
49 if ( !attribute )
50 return False;
51
52 value[0] = '\0';
53
54 if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
55 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
56
57 return False;
58 }
59
60 if (!convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, &size)) {
61 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
62 attribute, values[0]));
63 ldap_value_free(values);
64 return False;
65 }
66
67 ldap_value_free(values);
68 #ifdef DEBUG_PASSWORDS
69 DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
70 #endif
71 return True;
72 }
73
74 char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
75 const char *attribute,
76 TALLOC_CTX *mem_ctx)
77 {
78 char **values;
79 char *result;
80 size_t converted_size;
81
82 if (attribute == NULL) {
83 return NULL;
84 }
85
86 values = ldap_get_values(ldap_struct, entry, attribute);
87
88 if (values == NULL) {
89 DEBUG(10, ("attribute %s does not exist\n", attribute));
90 return NULL;
91 }
92
93 if (ldap_count_values(values) != 1) {
94 DEBUG(10, ("attribute %s has %d values, expected only one\n",
95 attribute, ldap_count_values(values)));
96 ldap_value_free(values);
97 return NULL;
98 }
99
100 if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
101 DEBUG(10, ("pull_utf8_talloc failed\n"));
102 ldap_value_free(values);
103 return NULL;
104 }
105
106 ldap_value_free(values);
107
108 #ifdef DEBUG_PASSWORDS
109 DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
110 attribute, result));
111 #endif
112 return result;
113 }
114
115 char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry,
116 const char *attribute,
117 TALLOC_CTX *mem_ctx)
118 {
119 char **values;
120 char *result;
121 size_t converted_size;
122
123 if (attribute == NULL) {
124 return NULL;
125 }
126
127 values = ldap_get_values(ldap_struct, entry, attribute);
128
129 if (values == NULL) {
130 DEBUG(10, ("attribute %s does not exist\n", attribute));
131 return NULL;
132 }
133
134 if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
135 DEBUG(10, ("pull_utf8_talloc failed\n"));
136 ldap_value_free(values);
137 return NULL;
138 }
139
140 ldap_value_free(values);
141
142 #ifdef DEBUG_PASSWORDS
143 DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n",
144 attribute, result));
145 #endif
146 return result;
147 }
148
149 char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
150 const char *attribute,
151 TALLOC_CTX *mem_ctx)
152 {
153 char **values;
154 char *result;
155 size_t converted_size;
156 int i, num_values;
157
158 if (attribute == NULL) {
159 return NULL;
160 }
161
162 values = ldap_get_values(ldap_struct, entry, attribute);
163
164 if (values == NULL) {
165 DEBUG(10, ("attribute %s does not exist\n", attribute));
166 return NULL;
167 }
168
169 if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
170 DEBUG(10, ("pull_utf8_talloc failed\n"));
171 ldap_value_free(values);
172 return NULL;
173 }
174
175 num_values = ldap_count_values(values);
176
177 for (i=1; i<num_values; i++) {
178 char *tmp;
179
180 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
181 &converted_size)) {
182 DEBUG(10, ("pull_utf8_talloc failed\n"));
183 TALLOC_FREE(result);
184 ldap_value_free(values);
185 return NULL;
186 }
187
188 if (strcasecmp_m(tmp, result) < 0) {
189 TALLOC_FREE(result);
190 result = tmp;
191 } else {
192 TALLOC_FREE(tmp);
193 }
194 }
195
196 ldap_value_free(values);
197
198 #ifdef DEBUG_PASSWORDS
199 DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
200 attribute, result));
201 #endif
202 return result;
203 }
204
205 bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
206 LDAPMessage *msg, const char *attrib,
207 DATA_BLOB *blob)
208 {
209 struct berval **values;
210
211 values = ldap_get_values_len(ld, msg, attrib);
212 if (!values) {
213 return false;
214 }
215
216 if (ldap_count_values_len(values) != 1) {
217 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
218 ldap_count_values_len(values)));
219 return false;
220 }
221
222 *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
223 values[0]->bv_len);
224 ldap_value_free_len(values);
225
226 return (blob->data != NULL);
227 }
228
229 bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
230 struct dom_sid *sid)
231 {
232 DATA_BLOB blob;
233 bool ret;
234
235 if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
236 &blob)) {
237 return false;
238 }
239 ret = sid_parse((char *)blob.data, blob.length, sid);
240 TALLOC_FREE(blob.data);
241 return ret;
242 }
243
244 static int ldapmsg_destructor(LDAPMessage **result) {
245 ldap_msgfree(*result);
246 return 0;
247 }
248
249 void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
250 {
251 LDAPMessage **handle;
252
253 if (result == NULL) {
254 return;
255 }
256
257 handle = talloc(mem_ctx, LDAPMessage *);
258 SMB_ASSERT(handle != NULL);
259
260 *handle = result;
261 talloc_set_destructor(handle, ldapmsg_destructor);
262 }
263
264 static int ldapmod_destructor(LDAPMod ***mod) {
265 ldap_mods_free(*mod, True);
266 return 0;
267 }
268
269 void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
270 {
271 LDAPMod ***handle;
272
273 if (mod == NULL) {
274 return;
275 }
276
277 handle = talloc(mem_ctx, LDAPMod **);
278 SMB_ASSERT(handle != NULL);
279
280 *handle = mod;
281 talloc_set_destructor(handle, ldapmod_destructor);
282 }
283
284 /************************************************************************
285 Routine to manage the LDAPMod structure array
286 manage memory used by the array, by each struct, and values
287 ***********************************************************************/
288
289 static void smbldap_set_mod_internal(LDAPMod *** modlist, int modop, const char *attribute, const char *value, const DATA_BLOB *blob)
290 {
291 LDAPMod **mods;
292 int i;
293 int j;
294
295 mods = *modlist;
296
297 /* sanity checks on the mod values */
298
299 if (attribute == NULL || *attribute == '\0') {
300 return;
301 }
302
303 #if 0 /* commented out after discussion with abartlet. Do not reenable.
304 left here so other do not re-add similar code --jerry */
305 if (value == NULL || *value == '\0')
306 return;
307 #endif
308
309 if (mods == NULL) {
310 mods = SMB_MALLOC_P(LDAPMod *);
311 if (mods == NULL) {
312 smb_panic("smbldap_set_mod: out of memory!");
313 /* notreached. */
314 }
315 mods[0] = NULL;
316 }
317
318 for (i = 0; mods[i] != NULL; ++i) {
319 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
320 break;
321 }
322
323 if (mods[i] == NULL) {
324 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
325 if (mods == NULL) {
326 smb_panic("smbldap_set_mod: out of memory!");
327 /* notreached. */
328 }
329 mods[i] = SMB_MALLOC_P(LDAPMod);
330 if (mods[i] == NULL) {
331 smb_panic("smbldap_set_mod: out of memory!");
332 /* notreached. */
333 }
334 mods[i]->mod_op = modop;
335 mods[i]->mod_values = NULL;
336 mods[i]->mod_type = SMB_STRDUP(attribute);
337 mods[i + 1] = NULL;
338 }
339
340 if (blob && (modop & LDAP_MOD_BVALUES)) {
341 j = 0;
342 if (mods[i]->mod_bvalues != NULL) {
343 for (; mods[i]->mod_bvalues[j] != NULL; j++);
344 }
345 mods[i]->mod_bvalues = SMB_REALLOC_ARRAY(mods[i]->mod_bvalues, struct berval *, j + 2);
346
347 if (mods[i]->mod_bvalues == NULL) {
348 smb_panic("smbldap_set_mod: out of memory!");
349 /* notreached. */
350 }
351
352 mods[i]->mod_bvalues[j] = SMB_MALLOC_P(struct berval);
353 SMB_ASSERT(mods[i]->mod_bvalues[j] != NULL);
354
355 mods[i]->mod_bvalues[j]->bv_val = (char *)memdup(blob->data, blob->length);
356 SMB_ASSERT(mods[i]->mod_bvalues[j]->bv_val != NULL);
357 mods[i]->mod_bvalues[j]->bv_len = blob->length;
358
359 mods[i]->mod_bvalues[j + 1] = NULL;
360 } else if (value != NULL) {
361 char *utf8_value = NULL;
362 size_t converted_size;
363
364 j = 0;
365 if (mods[i]->mod_values != NULL) {
366 for (; mods[i]->mod_values[j] != NULL; j++);
367 }
368 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
369
370 if (mods[i]->mod_values == NULL) {
371 smb_panic("smbldap_set_mod: out of memory!");
372 /* notreached. */
373 }
374
375 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
376 smb_panic("smbldap_set_mod: String conversion failure!");
377 /* notreached. */
378 }
379
380 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
381 TALLOC_FREE(utf8_value);
382 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
383
384 mods[i]->mod_values[j + 1] = NULL;
385 }
386 *modlist = mods;
387 }
388
389 void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
390 {
391 smbldap_set_mod_internal(modlist, modop, attribute, value, NULL);
392 }
393
394 void smbldap_set_mod_blob(LDAPMod *** modlist, int modop, const char *attribute, const DATA_BLOB *value)
395 {
396 smbldap_set_mod_internal(modlist, modop | LDAP_MOD_BVALUES, attribute, NULL, value);
397 }
398
399 /**********************************************************************
400 Set attribute to newval in LDAP, regardless of what value the
401 attribute had in LDAP before.
402 *********************************************************************/
403
404 static void smbldap_make_mod_internal(LDAP *ldap_struct, LDAPMessage *existing,
405 LDAPMod ***mods,
406 const char *attribute, int op,
407 const char *newval,
408 const DATA_BLOB *newblob)
409 {
410 char oldval[2048]; /* current largest allowed value is mungeddial */
411 bool existed;
412 DATA_BLOB oldblob = data_blob_null;
413
414 if (attribute == NULL) {
415 /* This can actually happen for ldapsam_compat where we for
416 * example don't have a password history */
417 return;
418 }
419
420 if (existing != NULL) {
421 if (op & LDAP_MOD_BVALUES) {
422 existed = smbldap_talloc_single_blob(talloc_tos(), ldap_struct, existing, attribute, &oldblob);
423 } else {
424 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
425 }
426 } else {
427 existed = False;
428 *oldval = '\0';
429 }
430
431 if (existed) {
432 bool equal = false;
433 if (op & LDAP_MOD_BVALUES) {
434 equal = (newblob && (data_blob_cmp(&oldblob, newblob) == 0));
435 } else {
436 /* all of our string attributes are case insensitive */
437 equal = (newval && (strcasecmp_m(oldval, newval) == 0));
438 }
439
440 if (equal) {
441 /* Believe it or not, but LDAP will deny a delete and
442 an add at the same time if the values are the
443 same... */
444 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
445 return;
446 }
447
448 /* There has been no value before, so don't delete it.
449 * Here's a possible race: We might end up with
450 * duplicate attributes */
451 /* By deleting exactly the value we found in the entry this
452 * should be race-free in the sense that the LDAP-Server will
453 * deny the complete operation if somebody changed the
454 * attribute behind our back. */
455 /* This will also allow modifying single valued attributes
456 * in Novell NDS. In NDS you have to first remove attribute and then
457 * you could add new value */
458
459 if (op & LDAP_MOD_BVALUES) {
460 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| blob\n", attribute));
461 smbldap_set_mod_blob(mods, LDAP_MOD_DELETE, attribute, &oldblob);
462 } else {
463 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
464 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
465 }
466 }
467
468 /* Regardless of the real operation (add or modify)
469 we add the new value here. We rely on deleting
470 the old value, should it exist. */
471
472 if (op & LDAP_MOD_BVALUES) {
473 if (newblob && newblob->length) {
474 DEBUG(10,("smbldap_make_mod: adding attribute |%s| blob\n", attribute));
475 smbldap_set_mod_blob(mods, LDAP_MOD_ADD, attribute, newblob);
476 }
477 } else {
478 if ((newval != NULL) && (strlen(newval) > 0)) {
479 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
480 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
481 }
482 }
483 }
484
485 void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
486 LDAPMod ***mods,
487 const char *attribute, const char *newval)
488 {
489 smbldap_make_mod_internal(ldap_struct, existing, mods, attribute,
490 0, newval, NULL);
491 }
492
493 void smbldap_make_mod_blob(LDAP *ldap_struct, LDAPMessage *existing,
494 LDAPMod ***mods,
495 const char *attribute, const DATA_BLOB *newblob)
496 {
497 smbldap_make_mod_internal(ldap_struct, existing, mods, attribute,
498 LDAP_MOD_BVALUES, NULL, newblob);
499 }
500
501 /**********************************************************************
502 Some varients of the LDAP rebind code do not pass in the third 'arg'
503 pointer to a void*, so we try and work around it by assuming that the
504 value of the 'LDAP *' pointer is the same as the one we had passed in
505 **********************************************************************/
506
507 struct smbldap_state_lookup {
508 LDAP *ld;
509 struct smbldap_state *smbldap_state;
510 struct smbldap_state_lookup *prev, *next;
511 };
512
513 static struct smbldap_state_lookup *smbldap_state_lookup_list;
514
515 static struct smbldap_state *smbldap_find_state(LDAP *ld)
516 {
517 struct smbldap_state_lookup *t;
518
519 for (t = smbldap_state_lookup_list; t; t = t->next) {
520 if (t->ld == ld) {
521 return t->smbldap_state;
522 }
523 }
524 return NULL;
525 }
526
527 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
528 {
529 struct smbldap_state_lookup *t;
530
531 for (t = smbldap_state_lookup_list; t; t = t->next) {
532 if (t->smbldap_state == smbldap_state) {
533 DLIST_REMOVE(smbldap_state_lookup_list, t);
534 SAFE_FREE(t);
535 return;
536 }
537 }
538 }
539
540 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
541 {
542 struct smbldap_state *tmp_ldap_state;
543 struct smbldap_state_lookup *t;
544
545 if ((tmp_ldap_state = smbldap_find_state(ld))) {
546 SMB_ASSERT(tmp_ldap_state == smbldap_state);
547 return;
548 }
549
550 t = SMB_XMALLOC_P(struct smbldap_state_lookup);
551 ZERO_STRUCTP(t);
552
553 DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
554 t->ld = ld;
555 t->smbldap_state = smbldap_state;
556 }
557
558 /********************************************************************
559 start TLS on an existing LDAP connection
560 *******************************************************************/
561
562 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
563 {
564 #ifdef LDAP_OPT_X_TLS
565 int rc;
566 #endif
567
568 if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
569 return LDAP_SUCCESS;
570 }
571
572 #ifdef LDAP_OPT_X_TLS
573 if (version != LDAP_VERSION3) {
574 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
575 return LDAP_OPERATIONS_ERROR;
576 }
577
578 if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS) {
579 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
580 ldap_err2string(rc)));
581 return rc;
582 }
583
584 DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
585 return LDAP_SUCCESS;
586 #else
587 DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
588 return LDAP_OPERATIONS_ERROR;
589 #endif
590 }
591
592 /********************************************************************
593 setup a connection to the LDAP server based on a uri
594 *******************************************************************/
595
596 static int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
597 {
598 int rc;
599
600 DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
601
602 #ifdef HAVE_LDAP_INITIALIZE
603
604 rc = ldap_initialize(ldap_struct, uri);
605 if (rc) {
606 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
607 return rc;
608 }
609
610 if (lp_ldap_follow_referral() != Auto) {
611 rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS,
612 lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF);
613 if (rc != LDAP_SUCCESS)
614 DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n",
615 ldap_err2string(rc)));
616 }
617
618 return LDAP_SUCCESS;
619 #else
620
621 /* Parse the string manually */
622
623 {
624 int port = 0;
625 fstring protocol;
626 fstring host;
627 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
628
629
630 /* skip leading "URL:" (if any) */
631 if ( strnequal( uri, "URL:", 4 ) ) {
632 uri += 4;
633 }
634
635 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
636
637 if (port == 0) {
638 if (strequal(protocol, "ldap")) {
639 port = LDAP_PORT;
640 } else if (strequal(protocol, "ldaps")) {
641 port = LDAPS_PORT;
642 } else {
643 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
644 }
645 }
646
647 if ((*ldap_struct = ldap_init(host, port)) == NULL) {
648 DEBUG(0, ("ldap_init failed !\n"));
649 return LDAP_OPERATIONS_ERROR;
650 }
651
652 if (strequal(protocol, "ldaps")) {
653 #ifdef LDAP_OPT_X_TLS
654 int tls = LDAP_OPT_X_TLS_HARD;
655 if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
656 {
657 DEBUG(0, ("Failed to setup a TLS session\n"));
658 }
659
660 DEBUG(3,("LDAPS option set...!\n"));
661 #else
662 DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
663 return LDAP_OPERATIONS_ERROR;
664 #endif /* LDAP_OPT_X_TLS */
665 }
666 }
667 #endif /* HAVE_LDAP_INITIALIZE */
668
669 /* now set connection timeout */
670 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
671 {
672 int ct = lp_ldap_connection_timeout()*1000;
673 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
674 if (rc != LDAP_SUCCESS) {
675 DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
676 ct, ldap_err2string(rc)));
677 }
678 }
679 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
680 {
681 struct timeval ct;
682 ct.tv_usec = 0;
683 ct.tv_sec = lp_ldap_connection_timeout();
684 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
685 if (rc != LDAP_SUCCESS) {
686 DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
687 (int)ct.tv_sec, ldap_err2string(rc)));
688 }
689 }
690 #endif
691
692 return LDAP_SUCCESS;
693 }
694
695 /********************************************************************
696 try to upgrade to Version 3 LDAP if not already, in either case return current
697 version
698 *******************************************************************/
699
700 static int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
701 {
702 int version;
703 int rc;
704
705 /* assume the worst */
706 *new_version = LDAP_VERSION2;
707
708 rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
709 if (rc) {
710 return rc;
711 }
712
713 if (version == LDAP_VERSION3) {
714 *new_version = LDAP_VERSION3;
715 return LDAP_SUCCESS;
716 }
717
718 /* try upgrade */
719 version = LDAP_VERSION3;
720 rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
721 if (rc) {
722 return rc;
723 }
724
725 *new_version = LDAP_VERSION3;
726 return LDAP_SUCCESS;
727 }
728
729 /*******************************************************************
730 open a connection to the ldap server (just until the bind)
731 ******************************************************************/
732
733 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
734 {
735 int rc, version;
736
737 rc = smb_ldap_setup_conn(ldap_struct, uri);
738 if (rc) {
739 return rc;
740 }
741
742 rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
743 if (rc) {
744 return rc;
745 }
746
747 rc = smb_ldap_start_tls(*ldap_struct, version);
748 if (rc) {
749 return rc;
750 }
751
752 return LDAP_SUCCESS;
753 }
754
755 /*******************************************************************
756 open a connection to the ldap server.
757 ******************************************************************/
758 static int smbldap_open_connection (struct smbldap_state *ldap_state)
759
760 {
761 int rc = LDAP_SUCCESS;
762 int version;
763 int deref;
764 LDAP **ldap_struct = &ldap_state->ldap_struct;
765
766 rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
767 if (rc) {
768 return rc;
769 }
770
771 /* Store the LDAP pointer in a lookup list */
772
773 smbldap_store_state(*ldap_struct, ldap_state);
774
775 /* Upgrade to LDAPv3 if possible */
776
777 rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
778 if (rc) {
779 return rc;
780 }
781
782 /* Start TLS if required */
783
784 rc = smb_ldap_start_tls(*ldap_struct, version);
785 if (rc) {
786 return rc;
787 }
788
789 /* Set alias dereferencing method */
790 deref = lp_ldap_deref();
791 if (deref != -1) {
792 if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) {
793 DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref));
794 } else {
795 DEBUG(5,("Set dereferencing method: %d\n", deref));
796 }
797 }
798
799 DEBUG(2, ("smbldap_open_connection: connection opened\n"));
800 return rc;
801 }
802
803 /*******************************************************************
804 a rebind function for authenticated referrals
805 This version takes a void* that we can shove useful stuff in :-)
806 ******************************************************************/
807 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
808 #else
809 static int rebindproc_with_state (LDAP * ld, char **whop, char **credp,
810 int *methodp, int freeit, void *arg)
811 {
812 struct smbldap_state *ldap_state = arg;
813 struct timespec ts;
814
815 /** @TODO Should we be doing something to check what servers we rebind to?
816 Could we get a referral to a machine that we don't want to give our
817 username and password to? */
818
819 if (freeit) {
820 SAFE_FREE(*whop);
821 if (*credp) {
822 memset(*credp, '\0', strlen(*credp));
823 }
824 SAFE_FREE(*credp);
825 } else {
826 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
827 ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
828
829 if (ldap_state->anonymous) {
830 *whop = NULL;
831 *credp = NULL;
832 } else {
833 *whop = SMB_STRDUP(ldap_state->bind_dn);
834 if (!*whop) {
835 return LDAP_NO_MEMORY;
836 }
837 *credp = SMB_STRDUP(ldap_state->bind_secret);
838 if (!*credp) {
839 SAFE_FREE(*whop);
840 return LDAP_NO_MEMORY;
841 }
842 }
843 *methodp = LDAP_AUTH_SIMPLE;
844 }
845
846 clock_gettime_mono(&ts);
847 ldap_state->last_rebind = convert_timespec_to_timeval(ts);
848
849 return 0;
850 }
851 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
852
853 /*******************************************************************
854 a rebind function for authenticated referrals
855 This version takes a void* that we can shove useful stuff in :-)
856 and actually does the connection.
857 ******************************************************************/
858 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
859 static int rebindproc_connect_with_state (LDAP *ldap_struct,
860 LDAP_CONST char *url,
861 ber_tag_t request,
862 ber_int_t msgid, void *arg)
863 {
864 struct smbldap_state *ldap_state =
865 (struct smbldap_state *)arg;
866 int rc;
867 struct timespec ts;
868 int version;
869
870 DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
871 url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
872
873 /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
874 * itself) before rebinding to another LDAP server to avoid to expose
875 * our credentials. At least *try* to secure the connection - Guenther */
876
877 smb_ldap_upgrade_conn(ldap_struct, &version);
878 smb_ldap_start_tls(ldap_struct, version);
879
880 /** @TODO Should we be doing something to check what servers we rebind to?
881 Could we get a referral to a machine that we don't want to give our
882 username and password to? */
883
884 rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
885
886 /* only set the last rebind timestamp when we did rebind after a
887 * non-read LDAP operation. That way we avoid the replication sleep
888 * after a simple redirected search operation - Guenther */
889
890 switch (request) {
891
892 case LDAP_REQ_MODIFY:
893 case LDAP_REQ_ADD:
894 case LDAP_REQ_DELETE:
895 case LDAP_REQ_MODDN:
896 case LDAP_REQ_EXTENDED:
897 DEBUG(10,("rebindproc_connect_with_state: "
898 "setting last_rebind timestamp "
899 "(req: 0x%02x)\n", (unsigned int)request));
900 clock_gettime_mono(&ts);
901 ldap_state->last_rebind = convert_timespec_to_timeval(ts);
902 break;
903 default:
904 ZERO_STRUCT(ldap_state->last_rebind);
905 break;
906 }
907
908 return rc;
909 }
910 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
911
912 /*******************************************************************
913 Add a rebind function for authenticated referrals
914 ******************************************************************/
915 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
916 #else
917 # if LDAP_SET_REBIND_PROC_ARGS == 2
918 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
919 int *method, int freeit )
920 {
921 struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
922
923 return rebindproc_with_state(ldap_struct, whop, credp,
924 method, freeit, ldap_state);
925 }
926 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
927 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
928
929 /*******************************************************************
930 a rebind function for authenticated referrals
931 this also does the connection, but no void*.
932 ******************************************************************/
933 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
934 # if LDAP_SET_REBIND_PROC_ARGS == 2
935 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
936 ber_int_t msgid)
937 {
938 struct smbldap_state *ldap_state = smbldap_find_state(ld);
939
940 return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
941 ldap_state);
942 }
943 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
944 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
945
946 /*******************************************************************
947 connect to the ldap server under system privilege.
948 ******************************************************************/
949 static int smbldap_connect_system(struct smbldap_state *ldap_state)
950 {
951 LDAP *ldap_struct = ldap_state->ldap_struct;
952 int rc;
953 int version;
954
955 /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
956 (OpenLDAP) doesnt' seem to support it */
957
958 DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
959 ldap_state->uri, ldap_state->bind_dn));
960
961 #ifdef HAVE_LDAP_SET_REBIND_PROC
962 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
963 # if LDAP_SET_REBIND_PROC_ARGS == 2
964 ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
965 # endif
966 # if LDAP_SET_REBIND_PROC_ARGS == 3
967 ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
968 # endif
969 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
970 # if LDAP_SET_REBIND_PROC_ARGS == 2
971 ldap_set_rebind_proc(ldap_struct, &rebindproc);
972 # endif
973 # if LDAP_SET_REBIND_PROC_ARGS == 3
974 ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
975 # endif
976 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
977 #endif
978
979 rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
980
981 if (rc != LDAP_SUCCESS) {
982 char *ld_error = NULL;
983 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
984 &ld_error);
985 DEBUG(ldap_state->num_failures ? 2 : 0,
986 ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
987 ldap_state->uri,
988 ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
989 ldap_err2string(rc),
990 ld_error ? ld_error : "(unknown)"));
991 SAFE_FREE(ld_error);
992 ldap_state->num_failures++;
993 goto done;
994 }
995
996 ldap_state->num_failures = 0;
997 ldap_state->paged_results = False;
998
999 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1000
1001 if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1002 ldap_state->paged_results = True;
1003 }
1004
1005 DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1006 DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1007 ldap_state->paged_results ? "does" : "does not"));
1008 done:
1009 if (rc != 0) {
1010 ldap_unbind(ldap_struct);
1011 ldap_state->ldap_struct = NULL;
1012 }
1013 return rc;
1014 }
1015
1016 static void smbldap_idle_fn(struct tevent_context *tevent_ctx,
1017 struct timed_event *te,
1018 struct timeval now_abs,
1019 void *private_data);
1020
1021 /**********************************************************************
1022 Connect to LDAP server (called before every ldap operation)
1023 *********************************************************************/
1024 static int smbldap_open(struct smbldap_state *ldap_state)
1025 {
1026 int rc, opt_rc;
1027 bool reopen = False;
1028 SMB_ASSERT(ldap_state);
1029
1030 if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time_mono(NULL))) {
1031
1032 #ifdef HAVE_UNIXSOCKET
1033 struct sockaddr_un addr;
1034 #else
1035 struct sockaddr addr;
1036 #endif
1037 socklen_t len = sizeof(addr);
1038 int sd;
1039
1040 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1041 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1042 reopen = True;
1043
1044 #ifdef HAVE_UNIXSOCKET
1045 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1046 reopen = True;
1047 #endif
1048 if (reopen) {
1049 /* the other end has died. reopen. */
1050 ldap_unbind(ldap_state->ldap_struct);
1051 ldap_state->ldap_struct = NULL;
1052 ldap_state->last_ping = (time_t)0;
1053 } else {
1054 ldap_state->last_ping = time_mono(NULL);
1055 }
1056 }
1057
1058 if (ldap_state->ldap_struct != NULL) {
1059 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1060 return LDAP_SUCCESS;
1061 }
1062
1063 if ((rc = smbldap_open_connection(ldap_state))) {
1064 return rc;
1065 }
1066
1067 if ((rc = smbldap_connect_system(ldap_state))) {
1068 return rc;
1069 }
1070
1071
1072 ldap_state->last_ping = time_mono(NULL);
1073 ldap_state->pid = sys_getpid();
1074
1075 TALLOC_FREE(ldap_state->idle_event);
1076
1077 if (ldap_state->tevent_context != NULL) {
1078 ldap_state->idle_event = tevent_add_timer(
1079 ldap_state->tevent_context, ldap_state,
1080 timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1081 smbldap_idle_fn, ldap_state);
1082 }
1083
1084 DEBUG(4,("The LDAP server is successfully connected\n"));
1085
1086 return LDAP_SUCCESS;
1087 }
1088
1089 /**********************************************************************
1090 Disconnect from LDAP server
1091 *********************************************************************/
1092 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1093 {
1094 if (!ldap_state)
1095 return NT_STATUS_INVALID_PARAMETER;
1096
1097 if (ldap_state->ldap_struct != NULL) {
1098 ldap_unbind(ldap_state->ldap_struct);
1099 ldap_state->ldap_struct = NULL;
1100 }
1101
1102 smbldap_delete_state(ldap_state);
1103
1104 TALLOC_FREE(ldap_state->idle_event);
1105
1106 DEBUG(5,("The connection to the LDAP server was closed\n"));
1107 /* maybe free the results here --metze */
1108
1109 return NT_STATUS_OK;
1110 }
1111
1112 static SIG_ATOMIC_T got_alarm;
1113
1114 static void gotalarm_sig(int dummy)
1115 {
1116 got_alarm = 1;
1117 }
1118
1119 static time_t calc_ldap_abs_endtime(int ldap_to)
1120 {
1121 if (ldap_to == 0) {
1122 /* No timeout - don't
1123 return a value for
1124 the alarm. */
1125 return (time_t)0;
1126 }
1127
1128 /* Make the alarm time one second beyond
1129 the timout we're setting for the
1130 remote search timeout, to allow that
1131 to fire in preference. */
1132
1133 return time_mono(NULL)+ldap_to+1;
1134 }
1135
1136 static int end_ldap_local_alarm(time_t absolute_endtime, int rc)
1137 {
1138 if (absolute_endtime) {
1139 alarm(0);
1140 CatchSignal(SIGALRM, SIG_IGN);
1141 if (got_alarm) {
1142 /* Client timeout error code. */
1143 got_alarm = 0;
1144 return LDAP_TIMEOUT;
1145 }
1146 }
1147 return rc;
1148 }
1149
1150 static void setup_ldap_local_alarm(struct smbldap_state *ldap_state, time_t absolute_endtime)
1151 {
1152 time_t now = time_mono(NULL);
1153
1154 if (absolute_endtime) {
1155 got_alarm = 0;
1156 CatchSignal(SIGALRM, gotalarm_sig);
1157 alarm(absolute_endtime - now);
1158 }
1159
1160 if (ldap_state->pid != sys_getpid()) {
1161 smbldap_close(ldap_state);
1162 }
1163 }
1164
1165 static void get_ldap_errs(struct smbldap_state *ldap_state, char **pp_ld_error, int *p_ld_errno)
1166 {
1167 ldap_get_option(ldap_state->ldap_struct,
1168 LDAP_OPT_ERROR_NUMBER, p_ld_errno);
1169
1170 ldap_get_option(ldap_state->ldap_struct,
1171 LDAP_OPT_ERROR_STRING, pp_ld_error);
1172 }
1173
1174 static int get_cached_ldap_connect(struct smbldap_state *ldap_state, time_t abs_endtime)
1175 {
1176 int attempts = 0;
1177
1178 while (1) {
1179 int rc;
1180 time_t now;
1181
1182 now = time_mono(NULL);
1183 ldap_state->last_use = now;
1184
1185 if (abs_endtime && now > abs_endtime) {
1186 smbldap_close(ldap_state);
1187 return LDAP_TIMEOUT;
1188 }
1189
1190 rc = smbldap_open(ldap_state);
1191
1192 if (rc == LDAP_SUCCESS) {
1193 return LDAP_SUCCESS;
1194 }
1195
1196 attempts++;
1197 DEBUG(1, ("Connection to LDAP server failed for the "
1198 "%d try!\n", attempts));
1199
1200 if (rc == LDAP_INSUFFICIENT_ACCESS) {
1201 /* The fact that we are non-root or any other
1202 * access-denied condition will not change in the next
1203 * round of trying */
1204 return rc;
1205 }
1206
1207 if (got_alarm) {
1208 smbldap_close(ldap_state);
1209 return LDAP_TIMEOUT;
1210 }
1211
1212 smb_msleep(1000);
1213
1214 if (got_alarm) {
1215 smbldap_close(ldap_state);
1216 return LDAP_TIMEOUT;
1217 }
1218 }
1219 }
1220
1221 /*********************************************************************
1222 ********************************************************************/
1223
1224 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1225 const char *base, int scope, const char *filter,
1226 const char *attrs[], int attrsonly,
1227 LDAPControl **sctrls, LDAPControl **cctrls,
1228 int sizelimit, LDAPMessage **res)
1229 {
1230 int rc = LDAP_SERVER_DOWN;
1231 char *utf8_filter;
1232 int to = lp_ldap_timeout();
1233 time_t abs_endtime = calc_ldap_abs_endtime(to);
1234 struct timeval timeout;
1235 struct timeval *timeout_ptr = NULL;
1236 size_t converted_size;
1237
1238 SMB_ASSERT(ldap_state);
1239
1240 DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1241 "scope => [%d]\n", base, filter, scope));
1242
1243 if (ldap_state->last_rebind.tv_sec > 0) {
1244 struct timeval tval;
1245 struct timespec ts;
1246 int64_t tdiff = 0;
1247 int sleep_time = 0;
1248
1249 clock_gettime_mono(&ts);
1250 tval = convert_timespec_to_timeval(ts);
1251
1252 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1253 tdiff /= 1000; /* Convert to milliseconds. */
1254
1255 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1256 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1257
1258 if (sleep_time > 0) {
1259 /* we wait for the LDAP replication */
1260 DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1261 "for LDAP replication.\n",sleep_time));
1262 smb_msleep(sleep_time);
1263 DEBUG(5,("smbldap_search_ext: go on!\n"));
1264 }
1265 ZERO_STRUCT(ldap_state->last_rebind);
1266 }
1267
1268 if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1269 return LDAP_NO_MEMORY;
1270 }
1271
1272 /* Setup remote timeout for the ldap_search_ext_s call. */
1273 if (to) {
1274 timeout.tv_sec = to;
1275 timeout.tv_usec = 0;
1276 timeout_ptr = &timeout;
1277 }
1278
1279 setup_ldap_local_alarm(ldap_state, abs_endtime);
1280
1281 while (1) {
1282 char *ld_error = NULL;
1283 int ld_errno;
1284
1285 rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1286 if (rc != LDAP_SUCCESS) {
1287 break;
1288 }
1289
1290 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1291 utf8_filter,
1292 discard_const_p(char *, attrs),
1293 attrsonly, sctrls, cctrls, timeout_ptr,
1294 sizelimit, res);
1295 if (rc == LDAP_SUCCESS) {
1296 break;
1297 }
1298
1299 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1300
1301 DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1302 "(%s)\n", base, ld_errno,
1303 ldap_err2string(rc),
1304 ld_error ? ld_error : "unknown"));
1305 SAFE_FREE(ld_error);
1306
1307 if (ld_errno != LDAP_SERVER_DOWN) {
1308 break;
1309 }
1310 ldap_unbind(ldap_state->ldap_struct);
1311 ldap_state->ldap_struct = NULL;
1312 }
1313
1314 TALLOC_FREE(utf8_filter);
1315 return end_ldap_local_alarm(abs_endtime, rc);
1316 }
1317
1318 int smbldap_search(struct smbldap_state *ldap_state,
1319 const char *base, int scope, const char *filter,
1320 const char *attrs[], int attrsonly,
1321 LDAPMessage **res)
1322 {
1323 return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1324 attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1325 }
1326
1327 int smbldap_search_paged(struct smbldap_state *ldap_state,
1328 const char *base, int scope, const char *filter,
1329 const char **attrs, int attrsonly, int pagesize,
1330 LDAPMessage **res, void **cookie)
1331 {
1332 LDAPControl pr;
1333 LDAPControl **rcontrols;
1334 LDAPControl *controls[2] = { NULL, NULL};
1335 BerElement *cookie_be = NULL;
1336 struct berval *cookie_bv = NULL;
1337 int tmp = 0, i, rc;
1338 bool critical = True;
1339
1340 *res = NULL;
1341
1342 DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1343 "scope => [%d], pagesize => [%d]\n",
1344 base, filter, scope, pagesize));
1345
1346 cookie_be = ber_alloc_t(LBER_USE_DER);
1347 if (cookie_be == NULL) {
1348 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1349 "NULL\n"));
1350 return LDAP_NO_MEMORY;
1351 }
1352
1353 /* construct cookie */
1354 if (*cookie != NULL) {
1355 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1356 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1357 *cookie = NULL;
1358 } else {
1359 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1360 }
1361 ber_flatten(cookie_be, &cookie_bv);
1362
1363 pr.ldctl_oid = discard_const_p(char, ADS_PAGE_CTL_OID);
1364 pr.ldctl_iscritical = (char) critical;
1365 pr.ldctl_value.bv_len = cookie_bv->bv_len;
1366 pr.ldctl_value.bv_val = cookie_bv->bv_val;
1367
1368 controls[0] = &pr;
1369 controls[1] = NULL;
1370
1371 rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1372 0, controls, NULL, LDAP_NO_LIMIT, res);
1373
1374 ber_free(cookie_be, 1);
1375 ber_bvfree(cookie_bv);
1376
1377 if (rc != 0) {
1378 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1379 "failed with [%s]\n", filter, ldap_err2string(rc)));
1380 goto done;
1381 }
1382
1383 DEBUG(3,("smbldap_search_paged: search was successful\n"));
1384
1385 rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1386 NULL, NULL, &rcontrols, 0);
1387 if (rc != 0) {
1388 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1389 "with [%s]\n", ldap_err2string(rc)));
1390 goto done;
1391 }
1392
1393 if (rcontrols == NULL)
1394 goto done;
1395
1396 for (i=0; rcontrols[i]; i++) {
1397
1398 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1399 continue;
1400
1401 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1402 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1403 /* the berval is the cookie, but must be freed when it is all
1404 done */
1405 if (cookie_bv->bv_len)
1406 *cookie=ber_bvdup(cookie_bv);
1407 else
1408 *cookie=NULL;
1409 ber_bvfree(cookie_bv);
1410 ber_free(cookie_be, 1);
1411 break;
1412 }
1413 ldap_controls_free(rcontrols);
1414 done:
1415 return rc;
1416 }
1417
1418 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1419 {
1420 int rc = LDAP_SERVER_DOWN;
1421 char *utf8_dn;
1422 time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1423 size_t converted_size;
1424
1425 SMB_ASSERT(ldap_state);
1426
1427 DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1428
1429 if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1430 return LDAP_NO_MEMORY;
1431 }
1432
1433 setup_ldap_local_alarm(ldap_state, abs_endtime);
1434
1435 while (1) {
1436 char *ld_error = NULL;
1437 int ld_errno;
1438
1439 rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1440 if (rc != LDAP_SUCCESS) {
1441 break;
1442 }
1443
1444 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1445 if (rc == LDAP_SUCCESS) {
1446 break;
1447 }
1448
1449 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1450
1451 DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1452 "(%s)\n", dn, ld_errno,
1453 ldap_err2string(rc),
1454 ld_error ? ld_error : "unknown"));
1455 SAFE_FREE(ld_error);
1456
1457 if (ld_errno != LDAP_SERVER_DOWN) {
1458 break;
1459 }
1460 ldap_unbind(ldap_state->ldap_struct);
1461 ldap_state->ldap_struct = NULL;
1462 }
1463
1464 TALLOC_FREE(utf8_dn);
1465 return end_ldap_local_alarm(abs_endtime, rc);
1466 }
1467
1468 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1469 {
1470 int rc = LDAP_SERVER_DOWN;
1471 char *utf8_dn;
1472 time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1473 size_t converted_size;
1474
1475 SMB_ASSERT(ldap_state);
1476
1477 DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1478
1479 if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1480 return LDAP_NO_MEMORY;
1481 }
1482
1483 setup_ldap_local_alarm(ldap_state, abs_endtime);
1484
1485 while (1) {
1486 char *ld_error = NULL;
1487 int ld_errno;
1488
1489 rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1490 if (rc != LDAP_SUCCESS) {
1491 break;
1492 }
1493
1494 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1495 if (rc == LDAP_SUCCESS) {
1496 break;
1497 }
1498
1499 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1500
1501 DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1502 "(%s)\n", dn, ld_errno,
1503 ldap_err2string(rc),
1504 ld_error ? ld_error : "unknown"));
1505 SAFE_FREE(ld_error);
1506
1507 if (ld_errno != LDAP_SERVER_DOWN) {
1508 break;
1509 }
1510 ldap_unbind(ldap_state->ldap_struct);
1511 ldap_state->ldap_struct = NULL;
1512 }
1513
1514 TALLOC_FREE(utf8_dn);
1515 return end_ldap_local_alarm(abs_endtime, rc);
1516 }
1517
1518 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1519 {
1520 int rc = LDAP_SERVER_DOWN;
1521 char *utf8_dn;
1522 time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1523 size_t converted_size;
1524
1525 SMB_ASSERT(ldap_state);
1526
1527 DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1528
1529 if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1530 return LDAP_NO_MEMORY;
1531 }
1532
1533 setup_ldap_local_alarm(ldap_state, abs_endtime);
1534
1535 while (1) {
1536 char *ld_error = NULL;
1537 int ld_errno;
1538
1539 rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1540 if (rc != LDAP_SUCCESS) {
1541 break;
1542 }
1543
1544 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1545 if (rc == LDAP_SUCCESS) {
1546 break;
1547 }
1548
1549 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1550
1551 DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1552 "(%s)\n", dn, ld_errno,
1553 ldap_err2string(rc),
1554 ld_error ? ld_error : "unknown"));
1555 SAFE_FREE(ld_error);
1556
1557 if (ld_errno != LDAP_SERVER_DOWN) {
1558 break;
1559 }
1560 ldap_unbind(ldap_state->ldap_struct);
1561 ldap_state->ldap_struct = NULL;
1562 }
1563
1564 TALLOC_FREE(utf8_dn);
1565 return end_ldap_local_alarm(abs_endtime, rc);
1566 }
1567
1568 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1569 LDAP_CONST char *reqoid, struct berval *reqdata,
1570 LDAPControl **serverctrls, LDAPControl **clientctrls,
1571 char **retoidp, struct berval **retdatap)
1572 {
1573 int rc = LDAP_SERVER_DOWN;
1574 time_t abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1575
1576 if (!ldap_state)
1577 return (-1);
1578
1579 setup_ldap_local_alarm(ldap_state, abs_endtime);
1580
1581 while (1) {
1582 char *ld_error = NULL;
1583 int ld_errno;
1584
1585 rc = get_cached_ldap_connect(ldap_state, abs_endtime);
1586 if (rc != LDAP_SUCCESS) {
1587 break;
1588 }
1589
1590 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1591 reqdata, serverctrls,
1592 clientctrls, retoidp, retdatap);
1593 if (rc == LDAP_SUCCESS) {
1594 break;
1595 }
1596
1597 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1598
1599 DEBUG(10, ("Extended operation failed with error: "
1600 "%d (%s) (%s)\n", ld_errno,
1601 ldap_err2string(rc),
1602 ld_error ? ld_error : "unknown"));
1603 SAFE_FREE(ld_error);
1604
1605 if (ld_errno != LDAP_SERVER_DOWN) {
1606 break;
1607 }
1608 ldap_unbind(ldap_state->ldap_struct);
1609 ldap_state->ldap_struct = NULL;
1610 }
1611
1612 return end_ldap_local_alarm(abs_endtime, rc);
1613 }
1614
1615 /*******************************************************************
1616 run the search by name.
1617 ******************************************************************/
1618 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1619 const char *filter, const char **search_attr,
1620 LDAPMessage ** result)
1621 {
1622 return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1623 filter, search_attr, 0, result);
1624 }
1625
1626 static void smbldap_idle_fn(struct tevent_context *tevent_ctx,
1627 struct timed_event *te,
1628 struct timeval now_abs,
1629 void *private_data)
1630 {
1631 struct smbldap_state *state = (struct smbldap_state *)private_data;
1632
1633 TALLOC_FREE(state->idle_event);
1634
1635 if (state->ldap_struct == NULL) {
1636 DEBUG(10,("ldap connection not connected...\n"));
1637 return;
1638 }
1639
1640 if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) {
1641 DEBUG(10,("ldap connection not idle...\n"));
1642
1643 /* this needs to be made monotonic clock aware inside tevent: */
1644 state->idle_event = tevent_add_timer(
1645 tevent_ctx, state,
1646 timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0),
1647 smbldap_idle_fn,
1648 private_data);
1649 return;
1650 }
1651
1652 DEBUG(7,("ldap connection idle...closing connection\n"));
1653 smbldap_close(state);
1654 }
1655
1656 /**********************************************************************
1657 Housekeeping
1658 *********************************************************************/
1659
1660 void smbldap_free_struct(struct smbldap_state **ldap_state)
1661 {
1662 smbldap_close(*ldap_state);
1663
1664 if ((*ldap_state)->bind_secret) {
1665 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1666 }
1667
1668 SAFE_FREE((*ldap_state)->bind_dn);
1669 SAFE_FREE((*ldap_state)->bind_secret);
1670
1671 TALLOC_FREE(*ldap_state);
1672
1673 /* No need to free any further, as it is talloc()ed */
1674 }
1675
1676 static int smbldap_state_destructor(struct smbldap_state *state)
1677 {
1678 smbldap_free_struct(&state);
1679 return 0;
1680 }
1681
1682
1683 /**********************************************************************
1684 Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1685 *********************************************************************/
1686
1687 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct tevent_context *tevent_ctx,
1688 const char *location,
1689 bool anon,
1690 const char *bind_dn,
1691 const char *bind_secret,
1692 struct smbldap_state **smbldap_state)
1693 {
1694 *smbldap_state = talloc_zero(mem_ctx, struct smbldap_state);
1695 if (!*smbldap_state) {
1696 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1697 return NT_STATUS_NO_MEMORY;
1698 }
1699
1700 if (location) {
1701 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1702 } else {
1703 (*smbldap_state)->uri = "ldap://localhost";
1704 }
1705
1706 (*smbldap_state)->tevent_context = tevent_ctx;
1707
1708 if (bind_dn && bind_secret) {
1709 smbldap_set_creds(*smbldap_state, anon, bind_dn, bind_secret);
1710 }
1711
1712 talloc_set_destructor(*smbldap_state, smbldap_state_destructor);
1713 return NT_STATUS_OK;
1714 }
1715
1716 char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1717 LDAPMessage *entry)
1718 {
1719 char *utf8_dn, *unix_dn;
1720 size_t converted_size;
1721
1722 utf8_dn = ldap_get_dn(ld, entry);
1723 if (!utf8_dn) {
1724 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1725 return NULL;
1726 }
1727 if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1728 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1729 "[%s]\n", utf8_dn));
1730 return NULL;
1731 }
1732 ldap_memfree(utf8_dn);
1733 return unix_dn;
1734 }
1735
1736 /*******************************************************************
1737 Check if root-dse has a certain Control or Extension
1738 ********************************************************************/
1739
1740 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1741 {
1742 LDAPMessage *msg = NULL;
1743 LDAPMessage *entry = NULL;
1744 char **values = NULL;
1745 int rc, num_result, num_values, i;
1746 bool result = False;
1747
1748 if (!attrs[0]) {
1749 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1750 return False;
1751 }
1752
1753 if (!strequal(attrs[0], "supportedExtension") &&
1754 !strequal(attrs[0], "supportedControl") &&
1755 !strequal(attrs[0], "namingContexts")) {
1756 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1757 return False;
1758 }
1759
1760 rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1761 "(objectclass=*)", discard_const_p(char *, attrs), 0 , &msg);
1762
1763 if (rc != LDAP_SUCCESS) {
1764 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1765 return False;
1766 }
1767
1768 num_result = ldap_count_entries(ld, msg);
1769
1770 if (num_result != 1) {
1771 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1772 goto done;
1773 }
1774
1775 entry = ldap_first_entry(ld, msg);
1776
1777 if (entry == NULL) {
1778 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1779 goto done;
1780 }
1781
1782 values = ldap_get_values(ld, entry, attrs[0]);
1783
1784 if (values == NULL) {
1785 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1786 goto done;
1787 }
1788
1789 num_values = ldap_count_values(values);
1790
1791 if (num_values == 0) {
1792 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1793 goto done;
1794 }
1795
1796 for (i=0; i<num_values; i++) {
1797 if (strcmp(values[i], value) == 0)
1798 result = True;
1799 }
1800
1801
1802 done:
1803 if (values != NULL)
1804 ldap_value_free(values);
1805 if (msg != NULL)
1806 ldap_msgfree(msg);
1807
1808 return result;
1809
1810 }
1811
1812 /*******************************************************************
1813 Check if LDAP-Server supports a certain Control (OID in string format)
1814 ********************************************************************/
1815
1816 bool smbldap_has_control(LDAP *ld, const char *control)
1817 {
1818 const char *attrs[] = { "supportedControl", NULL };
1819 return smbldap_check_root_dse(ld, attrs, control);
1820 }
1821
1822 /*******************************************************************
1823 Check if LDAP-Server supports a certain Extension (OID in string format)
1824 ********************************************************************/
1825
1826 bool smbldap_has_extension(LDAP *ld, const char *extension)
1827 {
1828 const char *attrs[] = { "supportedExtension", NULL };
1829 return smbldap_check_root_dse(ld, attrs, extension);
1830 }
1831
1832 /*******************************************************************
1833 Check if LDAP-Server holds a given namingContext
1834 ********************************************************************/
1835
1836 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1837 {
1838 const char *attrs[] = { "namingContexts", NULL };
1839 return smbldap_check_root_dse(ld, attrs, naming_context);
1840 }
1841
1842 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1843 {
1844 ldap_state->anonymous = anon;
1845
1846 /* free any previously set credential */
1847
1848 SAFE_FREE(ldap_state->bind_dn);
1849 if (ldap_state->bind_secret) {
1850 /* make sure secrets are zeroed out of memory */
1851 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1852 SAFE_FREE(ldap_state->bind_secret);
1853 }
1854
1855 if ( ! anon) {
1856 ldap_state->bind_dn = SMB_STRDUP(dn);
1857 ldap_state->bind_secret = SMB_STRDUP(secret);
1858 }
1859
1860 return True;
1861 }
reg import