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Use fsp->posix_open in preference if we have it.
[Samba.git] / source / lib / smbldap.c
blob7e9f1ac9158af5e7d6265a648f26fcfc4371b9c0
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
28 #ifndef LDAP_OPT_SUCCESS
29 #define LDAP_OPT_SUCCESS 0
30 #endif
31
32 /* Try not to hit the up or down server forever */
33
34 #define SMBLDAP_DONT_PING_TIME 10 /* ping only all 10 seconds */
35 #define SMBLDAP_NUM_RETRIES 8 /* retry only 8 times */
36
37 #define SMBLDAP_IDLE_TIME 150 /* After 2.5 minutes disconnect */
38
39
40 /* attributes used by Samba 2.2 */
41
42 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
43 { LDAP_ATTR_UID, "uid" },
44 { LDAP_ATTR_UIDNUMBER, LDAP_ATTRIBUTE_UIDNUMBER},
45 { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER},
46 { LDAP_ATTR_UNIX_HOME, "homeDirectory" },
47 { LDAP_ATTR_PWD_LAST_SET, "pwdLastSet" },
48 { LDAP_ATTR_PWD_CAN_CHANGE, "pwdCanChange" },
49 { LDAP_ATTR_PWD_MUST_CHANGE, "pwdMustChange" },
50 { LDAP_ATTR_LOGON_TIME, "logonTime" },
51 { LDAP_ATTR_LOGOFF_TIME, "logoffTime" },
52 { LDAP_ATTR_KICKOFF_TIME, "kickoffTime" },
53 { LDAP_ATTR_CN, "cn" },
54 { LDAP_ATTR_SN, "sn" },
55 { LDAP_ATTR_DISPLAY_NAME, "displayName" },
56 { LDAP_ATTR_HOME_PATH, "smbHome" },
57 { LDAP_ATTR_HOME_DRIVE, "homeDrive" },
58 { LDAP_ATTR_LOGON_SCRIPT, "scriptPath" },
59 { LDAP_ATTR_PROFILE_PATH, "profilePath" },
60 { LDAP_ATTR_DESC, "description" },
61 { LDAP_ATTR_USER_WKS, "userWorkstations"},
62 { LDAP_ATTR_USER_RID, "rid" },
63 { LDAP_ATTR_PRIMARY_GROUP_RID, "primaryGroupID"},
64 { LDAP_ATTR_LMPW, "lmPassword" },
65 { LDAP_ATTR_NTPW, "ntPassword" },
66 { LDAP_ATTR_DOMAIN, "domain" },
67 { LDAP_ATTR_OBJCLASS, "objectClass" },
68 { LDAP_ATTR_ACB_INFO, "acctFlags" },
69 { LDAP_ATTR_MOD_TIMESTAMP, "modifyTimestamp" },
70 { LDAP_ATTR_LIST_END, NULL }
71 };
72
73 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
74 { LDAP_ATTR_PWD_LAST_SET, "pwdLastSet" },
75 { LDAP_ATTR_PWD_CAN_CHANGE, "pwdCanChange" },
76 { LDAP_ATTR_PWD_MUST_CHANGE, "pwdMustChange" },
77 { LDAP_ATTR_LOGON_TIME, "logonTime" },
78 { LDAP_ATTR_LOGOFF_TIME, "logoffTime" },
79 { LDAP_ATTR_KICKOFF_TIME, "kickoffTime" },
80 { LDAP_ATTR_DISPLAY_NAME, "displayName" },
81 { LDAP_ATTR_HOME_PATH, "smbHome" },
82 { LDAP_ATTR_HOME_DRIVE, "homeDrives" },
83 { LDAP_ATTR_LOGON_SCRIPT, "scriptPath" },
84 { LDAP_ATTR_PROFILE_PATH, "profilePath" },
85 { LDAP_ATTR_USER_WKS, "userWorkstations"},
86 { LDAP_ATTR_USER_RID, "rid" },
87 { LDAP_ATTR_PRIMARY_GROUP_RID, "primaryGroupID"},
88 { LDAP_ATTR_LMPW, "lmPassword" },
89 { LDAP_ATTR_NTPW, "ntPassword" },
90 { LDAP_ATTR_DOMAIN, "domain" },
91 { LDAP_ATTR_ACB_INFO, "acctFlags" },
92 { LDAP_ATTR_LIST_END, NULL }
93 };
94
95 /* attributes used by Samba 3.0's sambaSamAccount */
96
97 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
98 { LDAP_ATTR_UID, "uid" },
99 { LDAP_ATTR_UIDNUMBER, LDAP_ATTRIBUTE_UIDNUMBER},
100 { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER},
101 { LDAP_ATTR_UNIX_HOME, "homeDirectory" },
102 { LDAP_ATTR_PWD_LAST_SET, "sambaPwdLastSet" },
103 { LDAP_ATTR_PWD_CAN_CHANGE, "sambaPwdCanChange" },
104 { LDAP_ATTR_PWD_MUST_CHANGE, "sambaPwdMustChange" },
105 { LDAP_ATTR_LOGON_TIME, "sambaLogonTime" },
106 { LDAP_ATTR_LOGOFF_TIME, "sambaLogoffTime" },
107 { LDAP_ATTR_KICKOFF_TIME, "sambaKickoffTime" },
108 { LDAP_ATTR_CN, "cn" },
109 { LDAP_ATTR_SN, "sn" },
110 { LDAP_ATTR_DISPLAY_NAME, "displayName" },
111 { LDAP_ATTR_HOME_DRIVE, "sambaHomeDrive" },
112 { LDAP_ATTR_HOME_PATH, "sambaHomePath" },
113 { LDAP_ATTR_LOGON_SCRIPT, "sambaLogonScript" },
114 { LDAP_ATTR_PROFILE_PATH, "sambaProfilePath" },
115 { LDAP_ATTR_DESC, "description" },
116 { LDAP_ATTR_USER_WKS, "sambaUserWorkstations" },
117 { LDAP_ATTR_USER_SID, LDAP_ATTRIBUTE_SID },
118 { LDAP_ATTR_PRIMARY_GROUP_SID, "sambaPrimaryGroupSID" },
119 { LDAP_ATTR_LMPW, "sambaLMPassword" },
120 { LDAP_ATTR_NTPW, "sambaNTPassword" },
121 { LDAP_ATTR_DOMAIN, "sambaDomainName" },
122 { LDAP_ATTR_OBJCLASS, "objectClass" },
123 { LDAP_ATTR_ACB_INFO, "sambaAcctFlags" },
124 { LDAP_ATTR_MUNGED_DIAL, "sambaMungedDial" },
125 { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
126 { LDAP_ATTR_BAD_PASSWORD_TIME, "sambaBadPasswordTime" },
127 { LDAP_ATTR_PWD_HISTORY, "sambaPasswordHistory" },
128 { LDAP_ATTR_MOD_TIMESTAMP, "modifyTimestamp" },
129 { LDAP_ATTR_LOGON_HOURS, "sambaLogonHours" },
130 { LDAP_ATTR_LIST_END, NULL }
131 };
132
133 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
134 { LDAP_ATTR_PWD_LAST_SET, "sambaPwdLastSet" },
135 { LDAP_ATTR_PWD_CAN_CHANGE, "sambaPwdCanChange" },
136 { LDAP_ATTR_PWD_MUST_CHANGE, "sambaPwdMustChange" },
137 { LDAP_ATTR_LOGON_TIME, "sambaLogonTime" },
138 { LDAP_ATTR_LOGOFF_TIME, "sambaLogoffTime" },
139 { LDAP_ATTR_KICKOFF_TIME, "sambaKickoffTime" },
140 { LDAP_ATTR_DISPLAY_NAME, "displayName" },
141 { LDAP_ATTR_HOME_DRIVE, "sambaHomeDrive" },
142 { LDAP_ATTR_HOME_PATH, "sambaHomePath" },
143 { LDAP_ATTR_LOGON_SCRIPT, "sambaLogonScript" },
144 { LDAP_ATTR_PROFILE_PATH, "sambaProfilePath" },
145 { LDAP_ATTR_USER_WKS, "sambaUserWorkstations" },
146 { LDAP_ATTR_USER_SID, LDAP_ATTRIBUTE_SID },
147 { LDAP_ATTR_PRIMARY_GROUP_SID, "sambaPrimaryGroupSID" },
148 { LDAP_ATTR_LMPW, "sambaLMPassword" },
149 { LDAP_ATTR_NTPW, "sambaNTPassword" },
150 { LDAP_ATTR_DOMAIN, "sambaDomainName" },
151 { LDAP_ATTR_ACB_INFO, "sambaAcctFlags" },
152 { LDAP_ATTR_MUNGED_DIAL, "sambaMungedDial" },
153 { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
154 { LDAP_ATTR_BAD_PASSWORD_TIME, "sambaBadPasswordTime" },
155 { LDAP_ATTR_PWD_HISTORY, "sambaPasswordHistory" },
156 { LDAP_ATTR_LOGON_HOURS, "sambaLogonHours" },
157 { LDAP_ATTR_LIST_END, NULL }
158 };
159
160 /* attributes used for allocating RIDs */
161
162 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
163 { LDAP_ATTR_DOMAIN, "sambaDomainName" },
164 { LDAP_ATTR_NEXT_RID, "sambaNextRid" },
165 { LDAP_ATTR_NEXT_USERRID, "sambaNextUserRid" },
166 { LDAP_ATTR_NEXT_GROUPRID, "sambaNextGroupRid" },
167 { LDAP_ATTR_DOM_SID, LDAP_ATTRIBUTE_SID },
168 { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
169 { LDAP_ATTR_OBJCLASS, "objectClass" },
170 { LDAP_ATTR_LIST_END, NULL },
171 };
172
173 /* Samba 3.0 group mapping attributes */
174
175 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
176 { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER},
177 { LDAP_ATTR_GROUP_SID, LDAP_ATTRIBUTE_SID },
178 { LDAP_ATTR_GROUP_TYPE, "sambaGroupType" },
179 { LDAP_ATTR_SID_LIST, "sambaSIDList" },
180 { LDAP_ATTR_DESC, "description" },
181 { LDAP_ATTR_DISPLAY_NAME, "displayName" },
182 { LDAP_ATTR_CN, "cn" },
183 { LDAP_ATTR_OBJCLASS, "objectClass" },
184 { LDAP_ATTR_LIST_END, NULL }
185 };
186
187 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
188 { LDAP_ATTR_GROUP_SID, LDAP_ATTRIBUTE_SID },
189 { LDAP_ATTR_GROUP_TYPE, "sambaGroupType" },
190 { LDAP_ATTR_DESC, "description" },
191 { LDAP_ATTR_DISPLAY_NAME, "displayName" },
192 { LDAP_ATTR_SID_LIST, "sambaSIDList" },
193 { LDAP_ATTR_LIST_END, NULL }
194 };
195
196 /* idmap_ldap sambaUnixIdPool */
197
198 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
199 { LDAP_ATTR_UIDNUMBER, LDAP_ATTRIBUTE_UIDNUMBER},
200 { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER},
201 { LDAP_ATTR_OBJCLASS, "objectClass" },
202 { LDAP_ATTR_LIST_END, NULL }
203 };
204
205 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
206 { LDAP_ATTR_SID, LDAP_ATTRIBUTE_SID },
207 { LDAP_ATTR_UIDNUMBER, LDAP_ATTRIBUTE_UIDNUMBER},
208 { LDAP_ATTR_GIDNUMBER, LDAP_ATTRIBUTE_GIDNUMBER},
209 { LDAP_ATTR_OBJCLASS, "objectClass" },
210 { LDAP_ATTR_LIST_END, NULL }
211 };
212
213 /**********************************************************************
214 perform a simple table lookup and return the attribute name
215 **********************************************************************/
216
217 const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
218 {
219 int i = 0;
220
221 while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
222 if ( table[i].attrib == key )
223 return table[i].name;
224 i++;
225 }
226
227 return NULL;
228 }
229
230
231 /**********************************************************************
232 Return the list of attribute names from a mapping table
233 **********************************************************************/
234
235 const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
236 {
237 const char **names;
238 int i = 0;
239
240 while ( table[i].attrib != LDAP_ATTR_LIST_END )
241 i++;
242 i++;
243
244 names = TALLOC_ARRAY( mem_ctx, const char*, i );
245 if ( !names ) {
246 DEBUG(0,("get_attr_list: out of memory\n"));
247 return NULL;
248 }
249
250 i = 0;
251 while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
252 names[i] = talloc_strdup( names, table[i].name );
253 i++;
254 }
255 names[i] = NULL;
256
257 return names;
258 }
259
260 /*******************************************************************
261 Search an attribute and return the first value found.
262 ******************************************************************/
263
264 bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
265 const char *attribute, char *value,
266 int max_len)
267 {
268 char **values;
269
270 if ( !attribute )
271 return False;
272
273 value[0] = '\0';
274
275 if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
276 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
277
278 return False;
279 }
280
281 if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
282 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
283 attribute, values[0]));
284 ldap_value_free(values);
285 return False;
286 }
287
288 ldap_value_free(values);
289 #ifdef DEBUG_PASSWORDS
290 DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
291 #endif
292 return True;
293 }
294
295 char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
296 const char *attribute,
297 TALLOC_CTX *mem_ctx)
298 {
299 char **values;
300 char *result;
301 size_t converted_size;
302
303 if (attribute == NULL) {
304 return NULL;
305 }
306
307 values = ldap_get_values(ldap_struct, entry, attribute);
308
309 if (values == NULL) {
310 DEBUG(10, ("attribute %s does not exist\n", attribute));
311 return NULL;
312 }
313
314 if (ldap_count_values(values) != 1) {
315 DEBUG(10, ("attribute %s has %d values, expected only one\n",
316 attribute, ldap_count_values(values)));
317 ldap_value_free(values);
318 return NULL;
319 }
320
321 if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
322 DEBUG(10, ("pull_utf8_talloc failed\n"));
323 ldap_value_free(values);
324 return NULL;
325 }
326
327 ldap_value_free(values);
328
329 #ifdef DEBUG_PASSWORDS
330 DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
331 attribute, result));
332 #endif
333 return result;
334 }
335
336 static int ldapmsg_destructor(LDAPMessage **result) {
337 ldap_msgfree(*result);
338 return 0;
339 }
340
341 void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
342 {
343 LDAPMessage **handle;
344
345 if (result == NULL) {
346 return;
347 }
348
349 handle = TALLOC_P(mem_ctx, LDAPMessage *);
350 SMB_ASSERT(handle != NULL);
351
352 *handle = result;
353 talloc_set_destructor(handle, ldapmsg_destructor);
354 }
355
356 static int ldapmod_destructor(LDAPMod ***mod) {
357 ldap_mods_free(*mod, True);
358 return 0;
359 }
360
361 void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
362 {
363 LDAPMod ***handle;
364
365 if (mod == NULL) {
366 return;
367 }
368
369 handle = TALLOC_P(mem_ctx, LDAPMod **);
370 SMB_ASSERT(handle != NULL);
371
372 *handle = mod;
373 talloc_set_destructor(handle, ldapmod_destructor);
374 }
375
376 /************************************************************************
377 Routine to manage the LDAPMod structure array
378 manage memory used by the array, by each struct, and values
379 ***********************************************************************/
380
381 void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
382 {
383 LDAPMod **mods;
384 int i;
385 int j;
386
387 mods = *modlist;
388
389 /* sanity checks on the mod values */
390
391 if (attribute == NULL || *attribute == '\0') {
392 return;
393 }
394
395 #if 0 /* commented out after discussion with abartlet. Do not reenable.
396 left here so other do not re-add similar code --jerry */
397 if (value == NULL || *value == '\0')
398 return;
399 #endif
400
401 if (mods == NULL) {
402 mods = SMB_MALLOC_P(LDAPMod *);
403 if (mods == NULL) {
404 smb_panic("smbldap_set_mod: out of memory!");
405 /* notreached. */
406 }
407 mods[0] = NULL;
408 }
409
410 for (i = 0; mods[i] != NULL; ++i) {
411 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
412 break;
413 }
414
415 if (mods[i] == NULL) {
416 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
417 if (mods == NULL) {
418 smb_panic("smbldap_set_mod: out of memory!");
419 /* notreached. */
420 }
421 mods[i] = SMB_MALLOC_P(LDAPMod);
422 if (mods[i] == NULL) {
423 smb_panic("smbldap_set_mod: out of memory!");
424 /* notreached. */
425 }
426 mods[i]->mod_op = modop;
427 mods[i]->mod_values = NULL;
428 mods[i]->mod_type = SMB_STRDUP(attribute);
429 mods[i + 1] = NULL;
430 }
431
432 if (value != NULL) {
433 char *utf8_value = NULL;
434 size_t converted_size;
435
436 j = 0;
437 if (mods[i]->mod_values != NULL) {
438 for (; mods[i]->mod_values[j] != NULL; j++);
439 }
440 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
441
442 if (mods[i]->mod_values == NULL) {
443 smb_panic("smbldap_set_mod: out of memory!");
444 /* notreached. */
445 }
446
447 if (!push_utf8_allocate(&utf8_value, value, &converted_size)) {
448 smb_panic("smbldap_set_mod: String conversion failure!");
449 /* notreached. */
450 }
451
452 mods[i]->mod_values[j] = utf8_value;
453
454 mods[i]->mod_values[j + 1] = NULL;
455 }
456 *modlist = mods;
457 }
458
459 /**********************************************************************
460 Set attribute to newval in LDAP, regardless of what value the
461 attribute had in LDAP before.
462 *********************************************************************/
463
464 void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
465 LDAPMod ***mods,
466 const char *attribute, const char *newval)
467 {
468 char oldval[2048]; /* current largest allowed value is mungeddial */
469 bool existed;
470
471 if (attribute == NULL) {
472 /* This can actually happen for ldapsam_compat where we for
473 * example don't have a password history */
474 return;
475 }
476
477 if (existing != NULL) {
478 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
479 } else {
480 existed = False;
481 *oldval = '\0';
482 }
483
484 /* all of our string attributes are case insensitive */
485
486 if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
487
488 /* Believe it or not, but LDAP will deny a delete and
489 an add at the same time if the values are the
490 same... */
491 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
492 return;
493 }
494
495 if (existed) {
496 /* There has been no value before, so don't delete it.
497 * Here's a possible race: We might end up with
498 * duplicate attributes */
499 /* By deleting exactly the value we found in the entry this
500 * should be race-free in the sense that the LDAP-Server will
501 * deny the complete operation if somebody changed the
502 * attribute behind our back. */
503 /* This will also allow modifying single valued attributes
504 * in Novell NDS. In NDS you have to first remove attribute and then
505 * you could add new value */
506
507 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
508 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
509 }
510
511 /* Regardless of the real operation (add or modify)
512 we add the new value here. We rely on deleting
513 the old value, should it exist. */
514
515 if ((newval != NULL) && (strlen(newval) > 0)) {
516 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
517 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
518 }
519 }
520
521 /**********************************************************************
522 Some varients of the LDAP rebind code do not pass in the third 'arg'
523 pointer to a void*, so we try and work around it by assuming that the
524 value of the 'LDAP *' pointer is the same as the one we had passed in
525 **********************************************************************/
526
527 struct smbldap_state_lookup {
528 LDAP *ld;
529 struct smbldap_state *smbldap_state;
530 struct smbldap_state_lookup *prev, *next;
531 };
532
533 static struct smbldap_state_lookup *smbldap_state_lookup_list;
534
535 static struct smbldap_state *smbldap_find_state(LDAP *ld)
536 {
537 struct smbldap_state_lookup *t;
538
539 for (t = smbldap_state_lookup_list; t; t = t->next) {
540 if (t->ld == ld) {
541 return t->smbldap_state;
542 }
543 }
544 return NULL;
545 }
546
547 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
548 {
549 struct smbldap_state_lookup *t;
550
551 for (t = smbldap_state_lookup_list; t; t = t->next) {
552 if (t->smbldap_state == smbldap_state) {
553 DLIST_REMOVE(smbldap_state_lookup_list, t);
554 SAFE_FREE(t);
555 return;
556 }
557 }
558 }
559
560 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
561 {
562 struct smbldap_state *tmp_ldap_state;
563 struct smbldap_state_lookup *t;
564
565 if ((tmp_ldap_state = smbldap_find_state(ld))) {
566 SMB_ASSERT(tmp_ldap_state == smbldap_state);
567 return;
568 }
569
570 t = SMB_XMALLOC_P(struct smbldap_state_lookup);
571 ZERO_STRUCTP(t);
572
573 DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
574 t->ld = ld;
575 t->smbldap_state = smbldap_state;
576 }
577
578 /********************************************************************
579 start TLS on an existing LDAP connection
580 *******************************************************************/
581
582 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
583 {
584 #ifdef LDAP_OPT_X_TLS
585 int rc;
586 #endif
587
588 if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
589 return LDAP_SUCCESS;
590 }
591
592 #ifdef LDAP_OPT_X_TLS
593 if (version != LDAP_VERSION3) {
594 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
595 return LDAP_OPERATIONS_ERROR;
596 }
597
598 if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS) {
599 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
600 ldap_err2string(rc)));
601 return rc;
602 }
603
604 DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
605 return LDAP_SUCCESS;
606 #else
607 DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
608 return LDAP_OPERATIONS_ERROR;
609 #endif
610 }
611
612 /********************************************************************
613 setup a connection to the LDAP server based on a uri
614 *******************************************************************/
615
616 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
617 {
618 int rc;
619
620 DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
621
622 #ifdef HAVE_LDAP_INITIALIZE
623
624 rc = ldap_initialize(ldap_struct, uri);
625 if (rc) {
626 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
627 }
628
629 return rc;
630 #else
631
632 /* Parse the string manually */
633
634 {
635 int port = 0;
636 fstring protocol;
637 fstring host;
638 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
639
640
641 /* skip leading "URL:" (if any) */
642 if ( strnequal( uri, "URL:", 4 ) ) {
643 uri += 4;
644 }
645
646 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
647
648 if (port == 0) {
649 if (strequal(protocol, "ldap")) {
650 port = LDAP_PORT;
651 } else if (strequal(protocol, "ldaps")) {
652 port = LDAPS_PORT;
653 } else {
654 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
655 }
656 }
657
658 if ((*ldap_struct = ldap_init(host, port)) == NULL) {
659 DEBUG(0, ("ldap_init failed !\n"));
660 return LDAP_OPERATIONS_ERROR;
661 }
662
663 if (strequal(protocol, "ldaps")) {
664 #ifdef LDAP_OPT_X_TLS
665 int tls = LDAP_OPT_X_TLS_HARD;
666 if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
667 {
668 DEBUG(0, ("Failed to setup a TLS session\n"));
669 }
670
671 DEBUG(3,("LDAPS option set...!\n"));
672 #else
673 DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
674 return LDAP_OPERATIONS_ERROR;
675 #endif /* LDAP_OPT_X_TLS */
676 }
677 }
678 #endif /* HAVE_LDAP_INITIALIZE */
679
680
681 /* now set connection timeout */
682 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
683 {
684 int ct = lp_ldap_connection_timeout()*1000;
685 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
686 if (rc != LDAP_SUCCESS) {
687 DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
688 ct, ldap_err2string(rc)));
689 }
690 }
691 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
692 {
693 struct timeval ct;
694 ct.tv_usec = 0;
695 ct.tv_sec = lp_ldap_connection_timeout();
696 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
697 if (rc != LDAP_SUCCESS) {
698 DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
699 (int)ct.tv_sec, ldap_err2string(rc)));
700 }
701 }
702 #endif
703
704 return LDAP_SUCCESS;
705 }
706
707 /********************************************************************
708 try to upgrade to Version 3 LDAP if not already, in either case return current
709 version
710 *******************************************************************/
711
712 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
713 {
714 int version;
715 int rc;
716
717 /* assume the worst */
718 *new_version = LDAP_VERSION2;
719
720 rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
721 if (rc) {
722 return rc;
723 }
724
725 if (version == LDAP_VERSION3) {
726 *new_version = LDAP_VERSION3;
727 return LDAP_SUCCESS;
728 }
729
730 /* try upgrade */
731 version = LDAP_VERSION3;
732 rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
733 if (rc) {
734 return rc;
735 }
736
737 *new_version = LDAP_VERSION3;
738 return LDAP_SUCCESS;
739 }
740
741 /*******************************************************************
742 open a connection to the ldap server (just until the bind)
743 ******************************************************************/
744
745 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
746 {
747 int rc, version;
748
749 rc = smb_ldap_setup_conn(ldap_struct, uri);
750 if (rc) {
751 return rc;
752 }
753
754 rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
755 if (rc) {
756 return rc;
757 }
758
759 rc = smb_ldap_start_tls(*ldap_struct, version);
760 if (rc) {
761 return rc;
762 }
763
764 return LDAP_SUCCESS;
765 }
766
767 /*******************************************************************
768 open a connection to the ldap server.
769 ******************************************************************/
770 static int smbldap_open_connection (struct smbldap_state *ldap_state)
771
772 {
773 int rc = LDAP_SUCCESS;
774 int version;
775 LDAP **ldap_struct = &ldap_state->ldap_struct;
776
777 rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
778 if (rc) {
779 return rc;
780 }
781
782 /* Store the LDAP pointer in a lookup list */
783
784 smbldap_store_state(*ldap_struct, ldap_state);
785
786 /* Upgrade to LDAPv3 if possible */
787
788 rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
789 if (rc) {
790 return rc;
791 }
792
793 /* Start TLS if required */
794
795 rc = smb_ldap_start_tls(*ldap_struct, version);
796 if (rc) {
797 return rc;
798 }
799
800 DEBUG(2, ("smbldap_open_connection: connection opened\n"));
801 return rc;
802 }
803
804 /*******************************************************************
805 a rebind function for authenticated referrals
806 This version takes a void* that we can shove useful stuff in :-)
807 ******************************************************************/
808 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
809 #else
810 static int rebindproc_with_state (LDAP * ld, char **whop, char **credp,
811 int *methodp, int freeit, void *arg)
812 {
813 struct smbldap_state *ldap_state = arg;
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 GetTimeOfDay(&ldap_state->last_rebind);
847
848 return 0;
849 }
850 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
851
852 /*******************************************************************
853 a rebind function for authenticated referrals
854 This version takes a void* that we can shove useful stuff in :-)
855 and actually does the connection.
856 ******************************************************************/
857 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
858 static int rebindproc_connect_with_state (LDAP *ldap_struct,
859 LDAP_CONST char *url,
860 ber_tag_t request,
861 ber_int_t msgid, void *arg)
862 {
863 struct smbldap_state *ldap_state =
864 (struct smbldap_state *)arg;
865 int rc;
866 int version;
867
868 DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
869 url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
870
871 /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
872 * itself) before rebinding to another LDAP server to avoid to expose
873 * our credentials. At least *try* to secure the connection - Guenther */
874
875 smb_ldap_upgrade_conn(ldap_struct, &version);
876 smb_ldap_start_tls(ldap_struct, version);
877
878 /** @TODO Should we be doing something to check what servers we rebind to?
879 Could we get a referral to a machine that we don't want to give our
880 username and password to? */
881
882 rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
883
884 /* only set the last rebind timestamp when we did rebind after a
885 * non-read LDAP operation. That way we avoid the replication sleep
886 * after a simple redirected search operation - Guenther */
887
888 switch (request) {
889
890 case LDAP_REQ_MODIFY:
891 case LDAP_REQ_ADD:
892 case LDAP_REQ_DELETE:
893 case LDAP_REQ_MODDN:
894 case LDAP_REQ_EXTENDED:
895 DEBUG(10,("rebindproc_connect_with_state: "
896 "setting last_rebind timestamp "
897 "(req: 0x%02x)\n", (unsigned int)request));
898 GetTimeOfDay(&ldap_state->last_rebind);
899 break;
900 default:
901 ZERO_STRUCT(ldap_state->last_rebind);
902 break;
903 }
904
905 return rc;
906 }
907 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
908
909 /*******************************************************************
910 Add a rebind function for authenticated referrals
911 ******************************************************************/
912 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
913 #else
914 # if LDAP_SET_REBIND_PROC_ARGS == 2
915 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
916 int *method, int freeit )
917 {
918 struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
919
920 return rebindproc_with_state(ldap_struct, whop, credp,
921 method, freeit, ldap_state);
922
923 }
924 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
925 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
926
927 /*******************************************************************
928 a rebind function for authenticated referrals
929 this also does the connection, but no void*.
930 ******************************************************************/
931 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
932 # if LDAP_SET_REBIND_PROC_ARGS == 2
933 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
934 ber_int_t msgid)
935 {
936 struct smbldap_state *ldap_state = smbldap_find_state(ld);
937
938 return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
939 ldap_state);
940 }
941 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
942 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
943
944 /*******************************************************************
945 connect to the ldap server under system privilege.
946 ******************************************************************/
947 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
948 {
949 int rc;
950 int version;
951
952 if (!ldap_state->anonymous && !ldap_state->bind_dn) {
953
954 /* get the default dn and password only if they are not set already */
955 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
956 DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
957 return LDAP_INVALID_CREDENTIALS;
958 }
959 }
960
961 /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
962 (OpenLDAP) doesnt' seem to support it */
963
964 DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
965 ldap_state->uri, ldap_state->bind_dn));
966
967 #ifdef HAVE_LDAP_SET_REBIND_PROC
968 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
969 # if LDAP_SET_REBIND_PROC_ARGS == 2
970 ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
971 # endif
972 # if LDAP_SET_REBIND_PROC_ARGS == 3
973 ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
974 # endif
975 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
976 # if LDAP_SET_REBIND_PROC_ARGS == 2
977 ldap_set_rebind_proc(ldap_struct, &rebindproc);
978 # endif
979 # if LDAP_SET_REBIND_PROC_ARGS == 3
980 ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
981 # endif
982 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
983 #endif
984
985 rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
986
987 if (rc != LDAP_SUCCESS) {
988 char *ld_error = NULL;
989 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
990 &ld_error);
991 DEBUG(ldap_state->num_failures ? 2 : 0,
992 ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
993 ldap_state->uri,
994 ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
995 ldap_err2string(rc),
996 ld_error ? ld_error : "(unknown)"));
997 SAFE_FREE(ld_error);
998 ldap_state->num_failures++;
999 return rc;
1000 }
1001
1002 ldap_state->num_failures = 0;
1003 ldap_state->paged_results = False;
1004
1005 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1006
1007 if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1008 ldap_state->paged_results = True;
1009 }
1010
1011 DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1012 DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1013 ldap_state->paged_results ? "does" : "does not"));
1014 return rc;
1015 }
1016
1017 static void smbldap_idle_fn(struct event_context *event_ctx,
1018 struct timed_event *te,
1019 struct timeval now,
1020 void *private_data);
1021
1022 /**********************************************************************
1023 Connect to LDAP server (called before every ldap operation)
1024 *********************************************************************/
1025 static int smbldap_open(struct smbldap_state *ldap_state)
1026 {
1027 int rc, opt_rc;
1028 bool reopen = False;
1029 SMB_ASSERT(ldap_state);
1030
1031 if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1032
1033 #ifdef HAVE_UNIXSOCKET
1034 struct sockaddr_un addr;
1035 #else
1036 struct sockaddr addr;
1037 #endif
1038 socklen_t len = sizeof(addr);
1039 int sd;
1040
1041 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1042 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1043 reopen = True;
1044
1045 #ifdef HAVE_UNIXSOCKET
1046 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1047 reopen = True;
1048 #endif
1049 if (reopen) {
1050 /* the other end has died. reopen. */
1051 ldap_unbind(ldap_state->ldap_struct);
1052 ldap_state->ldap_struct = NULL;
1053 ldap_state->last_ping = (time_t)0;
1054 } else {
1055 ldap_state->last_ping = time(NULL);
1056 }
1057 }
1058
1059 if (ldap_state->ldap_struct != NULL) {
1060 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1061 return LDAP_SUCCESS;
1062 }
1063
1064 if ((rc = smbldap_open_connection(ldap_state))) {
1065 return rc;
1066 }
1067
1068 if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1069 ldap_unbind(ldap_state->ldap_struct);
1070 ldap_state->ldap_struct = NULL;
1071 return rc;
1072 }
1073
1074
1075 ldap_state->last_ping = time(NULL);
1076 ldap_state->pid = sys_getpid();
1077
1078 TALLOC_FREE(ldap_state->idle_event);
1079
1080 if (ldap_state->event_context != NULL) {
1081 ldap_state->idle_event = event_add_timed(
1082 ldap_state->event_context, NULL,
1083 timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1084 smbldap_idle_fn, ldap_state);
1085 }
1086
1087 DEBUG(4,("The LDAP server is successfully connected\n"));
1088
1089 return LDAP_SUCCESS;
1090 }
1091
1092 /**********************************************************************
1093 Disconnect from LDAP server
1094 *********************************************************************/
1095 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1096 {
1097 if (!ldap_state)
1098 return NT_STATUS_INVALID_PARAMETER;
1099
1100 if (ldap_state->ldap_struct != NULL) {
1101 ldap_unbind(ldap_state->ldap_struct);
1102 ldap_state->ldap_struct = NULL;
1103 }
1104
1105 smbldap_delete_state(ldap_state);
1106
1107 DEBUG(5,("The connection to the LDAP server was closed\n"));
1108 /* maybe free the results here --metze */
1109
1110 return NT_STATUS_OK;
1111 }
1112
1113 static bool got_alarm;
1114
1115 static void (*old_handler)(int);
1116
1117 static void gotalarm_sig(int dummy)
1118 {
1119 got_alarm = True;
1120 }
1121
1122 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1123 int *attempts, time_t endtime)
1124 {
1125 time_t now = time(NULL);
1126 int open_rc = LDAP_SERVER_DOWN;
1127
1128 if (*rc != LDAP_SERVER_DOWN)
1129 goto no_next;
1130
1131 if (now >= endtime) {
1132 smbldap_close(ldap_state);
1133 *rc = LDAP_TIMEOUT;
1134 goto no_next;
1135 }
1136
1137 if (*attempts == 0) {
1138 got_alarm = False;
1139 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1140 alarm(endtime - now);
1141
1142 if (ldap_state->pid != sys_getpid())
1143 smbldap_close(ldap_state);
1144 }
1145
1146 while (1) {
1147
1148 if (*attempts != 0)
1149 smb_msleep(1000);
1150
1151 *attempts += 1;
1152
1153 open_rc = smbldap_open(ldap_state);
1154
1155 if (open_rc == LDAP_SUCCESS) {
1156 ldap_state->last_use = now;
1157 return True;
1158 }
1159
1160 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1161 /* The fact that we are non-root or any other
1162 * access-denied condition will not change in the next
1163 * round of trying */
1164 *rc = open_rc;
1165 break;
1166 }
1167
1168 if (got_alarm) {
1169 *rc = LDAP_TIMEOUT;
1170 break;
1171 }
1172
1173 if (open_rc != LDAP_SUCCESS) {
1174 DEBUG(1, ("Connection to LDAP server failed for the "
1175 "%d try!\n", *attempts));
1176 }
1177 }
1178
1179 no_next:
1180 CatchSignal(SIGALRM, old_handler);
1181 alarm(0);
1182 ldap_state->last_use = now;
1183 return False;
1184 }
1185
1186 /*********************************************************************
1187 ********************************************************************/
1188
1189 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1190 const char *base, int scope, const char *filter,
1191 const char *attrs[], int attrsonly,
1192 LDAPControl **sctrls, LDAPControl **cctrls,
1193 int sizelimit, LDAPMessage **res)
1194 {
1195 int rc = LDAP_SERVER_DOWN;
1196 int attempts = 0;
1197 char *utf8_filter;
1198 time_t endtime = time(NULL)+lp_ldap_timeout();
1199 struct timeval timeout;
1200 size_t converted_size;
1201
1202 SMB_ASSERT(ldap_state);
1203
1204 DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1205 "scope => [%d]\n", base, filter, scope));
1206
1207 if (ldap_state->last_rebind.tv_sec > 0) {
1208 struct timeval tval;
1209 SMB_BIG_INT tdiff = 0;
1210 int sleep_time = 0;
1211
1212 ZERO_STRUCT(tval);
1213 GetTimeOfDay(&tval);
1214
1215 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1216 tdiff /= 1000; /* Convert to milliseconds. */
1217
1218 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1219 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1220
1221 if (sleep_time > 0) {
1222 /* we wait for the LDAP replication */
1223 DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1224 "for LDAP replication.\n",sleep_time));
1225 smb_msleep(sleep_time);
1226 DEBUG(5,("smbldap_search_ext: go on!\n"));
1227 }
1228 ZERO_STRUCT(ldap_state->last_rebind);
1229 }
1230
1231 if (!push_utf8_allocate(&utf8_filter, filter, &converted_size)) {
1232 return LDAP_NO_MEMORY;
1233 }
1234
1235 /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1236 timeout.tv_sec = lp_ldap_timeout();
1237 timeout.tv_usec = 0;
1238
1239 /* Setup alarm timeout.... Do we need both of these ? JRA.
1240 * Yes, I think we do need both of these. The server timeout only
1241 * covers the case where the server's operation takes too long. It
1242 * does not cover the case where the request hangs on its way to the
1243 * server. The server side timeout is not strictly necessary, it's
1244 * just a bit more kind to the server. VL. */
1245
1246 got_alarm = 0;
1247 CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1248 alarm(lp_ldap_timeout());
1249 /* End setup timeout. */
1250
1251 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1252 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1253 utf8_filter,
1254 CONST_DISCARD(char **, attrs),
1255 attrsonly, sctrls, cctrls, &timeout,
1256 sizelimit, res);
1257 if (rc != LDAP_SUCCESS) {
1258 char *ld_error = NULL;
1259 int ld_errno;
1260
1261 ldap_get_option(ldap_state->ldap_struct,
1262 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1263
1264 ldap_get_option(ldap_state->ldap_struct,
1265 LDAP_OPT_ERROR_STRING, &ld_error);
1266 DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1267 "(%s)\n", base, ld_errno,
1268 ldap_err2string(rc),
1269 ld_error ? ld_error : "unknown"));
1270 SAFE_FREE(ld_error);
1271
1272 if (ld_errno == LDAP_SERVER_DOWN) {
1273 ldap_unbind(ldap_state->ldap_struct);
1274 ldap_state->ldap_struct = NULL;
1275 }
1276 }
1277 }
1278
1279 SAFE_FREE(utf8_filter);
1280
1281 /* Teardown timeout. */
1282 CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1283 alarm(0);
1284
1285 if (got_alarm != 0)
1286 return LDAP_TIMELIMIT_EXCEEDED;
1287
1288 return rc;
1289 }
1290
1291 int smbldap_search(struct smbldap_state *ldap_state,
1292 const char *base, int scope, const char *filter,
1293 const char *attrs[], int attrsonly,
1294 LDAPMessage **res)
1295 {
1296 return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1297 attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1298 }
1299
1300 int smbldap_search_paged(struct smbldap_state *ldap_state,
1301 const char *base, int scope, const char *filter,
1302 const char **attrs, int attrsonly, int pagesize,
1303 LDAPMessage **res, void **cookie)
1304 {
1305 LDAPControl pr;
1306 LDAPControl **rcontrols;
1307 LDAPControl *controls[2] = { NULL, NULL};
1308 BerElement *cookie_be = NULL;
1309 struct berval *cookie_bv = NULL;
1310 int tmp = 0, i, rc;
1311 bool critical = True;
1312
1313 *res = NULL;
1314
1315 DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1316 "scope => [%d], pagesize => [%d]\n",
1317 base, filter, scope, pagesize));
1318
1319 cookie_be = ber_alloc_t(LBER_USE_DER);
1320 if (cookie_be == NULL) {
1321 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1322 "NULL\n"));
1323 return LDAP_NO_MEMORY;
1324 }
1325
1326 /* construct cookie */
1327 if (*cookie != NULL) {
1328 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1329 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1330 *cookie = NULL;
1331 } else {
1332 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1333 }
1334 ber_flatten(cookie_be, &cookie_bv);
1335
1336 pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1337 pr.ldctl_iscritical = (char) critical;
1338 pr.ldctl_value.bv_len = cookie_bv->bv_len;
1339 pr.ldctl_value.bv_val = cookie_bv->bv_val;
1340
1341 controls[0] = &pr;
1342 controls[1] = NULL;
1343
1344 rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1345 0, controls, NULL, LDAP_NO_LIMIT, res);
1346
1347 ber_free(cookie_be, 1);
1348 ber_bvfree(cookie_bv);
1349
1350 if (rc != 0) {
1351 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1352 "failed with [%s]\n", filter, ldap_err2string(rc)));
1353 goto done;
1354 }
1355
1356 DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1357
1358 rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1359 NULL, NULL, &rcontrols, 0);
1360 if (rc != 0) {
1361 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1362 "with [%s]\n", ldap_err2string(rc)));
1363 goto done;
1364 }
1365
1366 if (rcontrols == NULL)
1367 goto done;
1368
1369 for (i=0; rcontrols[i]; i++) {
1370
1371 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1372 continue;
1373
1374 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1375 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1376 /* the berval is the cookie, but must be freed when it is all
1377 done */
1378 if (cookie_bv->bv_len)
1379 *cookie=ber_bvdup(cookie_bv);
1380 else
1381 *cookie=NULL;
1382 ber_bvfree(cookie_bv);
1383 ber_free(cookie_be, 1);
1384 break;
1385 }
1386 ldap_controls_free(rcontrols);
1387 done:
1388 return rc;
1389 }
1390
1391 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1392 {
1393 int rc = LDAP_SERVER_DOWN;
1394 int attempts = 0;
1395 char *utf8_dn;
1396 time_t endtime = time(NULL)+lp_ldap_timeout();
1397 size_t converted_size;
1398
1399 SMB_ASSERT(ldap_state);
1400
1401 DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1402
1403 if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1404 return LDAP_NO_MEMORY;
1405 }
1406
1407 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1408 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1409 if (rc != LDAP_SUCCESS) {
1410 char *ld_error = NULL;
1411 int ld_errno;
1412
1413 ldap_get_option(ldap_state->ldap_struct,
1414 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1415
1416 ldap_get_option(ldap_state->ldap_struct,
1417 LDAP_OPT_ERROR_STRING, &ld_error);
1418 DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1419 "(%s)\n", dn, ld_errno,
1420 ldap_err2string(rc),
1421 ld_error ? ld_error : "unknown"));
1422 SAFE_FREE(ld_error);
1423
1424 if (ld_errno == LDAP_SERVER_DOWN) {
1425 ldap_unbind(ldap_state->ldap_struct);
1426 ldap_state->ldap_struct = NULL;
1427 }
1428 }
1429 }
1430
1431 SAFE_FREE(utf8_dn);
1432 return rc;
1433 }
1434
1435 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1436 {
1437 int rc = LDAP_SERVER_DOWN;
1438 int attempts = 0;
1439 char *utf8_dn;
1440 time_t endtime = time(NULL)+lp_ldap_timeout();
1441 size_t converted_size;
1442
1443 SMB_ASSERT(ldap_state);
1444
1445 DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1446
1447 if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1448 return LDAP_NO_MEMORY;
1449 }
1450
1451 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1452 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1453 if (rc != LDAP_SUCCESS) {
1454 char *ld_error = NULL;
1455 int ld_errno;
1456
1457 ldap_get_option(ldap_state->ldap_struct,
1458 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1459
1460 ldap_get_option(ldap_state->ldap_struct,
1461 LDAP_OPT_ERROR_STRING, &ld_error);
1462 DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1463 "(%s)\n", dn, ld_errno,
1464 ldap_err2string(rc),
1465 ld_error ? ld_error : "unknown"));
1466 SAFE_FREE(ld_error);
1467
1468 if (ld_errno == LDAP_SERVER_DOWN) {
1469 ldap_unbind(ldap_state->ldap_struct);
1470 ldap_state->ldap_struct = NULL;
1471 }
1472 }
1473 }
1474
1475 SAFE_FREE(utf8_dn);
1476 return rc;
1477 }
1478
1479 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1480 {
1481 int rc = LDAP_SERVER_DOWN;
1482 int attempts = 0;
1483 char *utf8_dn;
1484 time_t endtime = time(NULL)+lp_ldap_timeout();
1485 size_t converted_size;
1486
1487 SMB_ASSERT(ldap_state);
1488
1489 DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1490
1491 if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1492 return LDAP_NO_MEMORY;
1493 }
1494
1495 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1496 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1497 if (rc != LDAP_SUCCESS) {
1498 char *ld_error = NULL;
1499 int ld_errno;
1500
1501 ldap_get_option(ldap_state->ldap_struct,
1502 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1503
1504 ldap_get_option(ldap_state->ldap_struct,
1505 LDAP_OPT_ERROR_STRING, &ld_error);
1506 DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1507 "(%s)\n", dn, ld_errno,
1508 ldap_err2string(rc),
1509 ld_error ? ld_error : "unknown"));
1510 SAFE_FREE(ld_error);
1511
1512 if (ld_errno == LDAP_SERVER_DOWN) {
1513 ldap_unbind(ldap_state->ldap_struct);
1514 ldap_state->ldap_struct = NULL;
1515 }
1516 }
1517 }
1518
1519 SAFE_FREE(utf8_dn);
1520 return rc;
1521 }
1522
1523 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1524 LDAP_CONST char *reqoid, struct berval *reqdata,
1525 LDAPControl **serverctrls, LDAPControl **clientctrls,
1526 char **retoidp, struct berval **retdatap)
1527 {
1528 int rc = LDAP_SERVER_DOWN;
1529 int attempts = 0;
1530 time_t endtime = time(NULL)+lp_ldap_timeout();
1531
1532 if (!ldap_state)
1533 return (-1);
1534
1535 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1536 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1537 reqdata, serverctrls,
1538 clientctrls, retoidp, retdatap);
1539 if (rc != LDAP_SUCCESS) {
1540 char *ld_error = NULL;
1541 int ld_errno;
1542
1543 ldap_get_option(ldap_state->ldap_struct,
1544 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1545
1546 ldap_get_option(ldap_state->ldap_struct,
1547 LDAP_OPT_ERROR_STRING, &ld_error);
1548 DEBUG(10, ("Extended operation failed with error: "
1549 "%d (%s) (%s)\n", ld_errno,
1550 ldap_err2string(rc),
1551 ld_error ? ld_error : "unknown"));
1552 SAFE_FREE(ld_error);
1553
1554 if (ld_errno == LDAP_SERVER_DOWN) {
1555 ldap_unbind(ldap_state->ldap_struct);
1556 ldap_state->ldap_struct = NULL;
1557 }
1558 }
1559 }
1560
1561 return rc;
1562 }
1563
1564 /*******************************************************************
1565 run the search by name.
1566 ******************************************************************/
1567 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1568 const char *filter, const char **search_attr,
1569 LDAPMessage ** result)
1570 {
1571 return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1572 filter, search_attr, 0, result);
1573 }
1574
1575 static void smbldap_idle_fn(struct event_context *event_ctx,
1576 struct timed_event *te,
1577 struct timeval now,
1578 void *private_data)
1579 {
1580 struct smbldap_state *state = (struct smbldap_state *)private_data;
1581
1582 TALLOC_FREE(state->idle_event);
1583
1584 if (state->ldap_struct == NULL) {
1585 DEBUG(10,("ldap connection not connected...\n"));
1586 return;
1587 }
1588
1589 if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1590 DEBUG(10,("ldap connection not idle...\n"));
1591
1592 state->idle_event = event_add_timed(
1593 event_ctx, NULL,
1594 timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1595 smbldap_idle_fn,
1596 private_data);
1597 return;
1598 }
1599
1600 DEBUG(7,("ldap connection idle...closing connection\n"));
1601 smbldap_close(state);
1602 }
1603
1604 /**********************************************************************
1605 Housekeeping
1606 *********************************************************************/
1607
1608 void smbldap_free_struct(struct smbldap_state **ldap_state)
1609 {
1610 smbldap_close(*ldap_state);
1611
1612 if ((*ldap_state)->bind_secret) {
1613 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1614 }
1615
1616 SAFE_FREE((*ldap_state)->bind_dn);
1617 SAFE_FREE((*ldap_state)->bind_secret);
1618
1619 TALLOC_FREE((*ldap_state)->idle_event);
1620
1621 *ldap_state = NULL;
1622
1623 /* No need to free any further, as it is talloc()ed */
1624 }
1625
1626
1627 /**********************************************************************
1628 Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1629 *********************************************************************/
1630
1631 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1632 const char *location,
1633 struct smbldap_state **smbldap_state)
1634 {
1635 *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1636 if (!*smbldap_state) {
1637 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1638 return NT_STATUS_NO_MEMORY;
1639 }
1640
1641 if (location) {
1642 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1643 } else {
1644 (*smbldap_state)->uri = "ldap://localhost";
1645 }
1646
1647 (*smbldap_state)->event_context = event_ctx;
1648
1649 return NT_STATUS_OK;
1650 }
1651
1652 /*******************************************************************
1653 Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1654 ********************************************************************/
1655 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1656 {
1657 char *utf8_dn, *unix_dn;
1658 size_t converted_size;
1659
1660 utf8_dn = ldap_get_dn(ld, entry);
1661 if (!utf8_dn) {
1662 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1663 return NULL;
1664 }
1665 if (!pull_utf8_allocate(&unix_dn, utf8_dn, &converted_size)) {
1666 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1667 "[%s]\n", utf8_dn));
1668 return NULL;
1669 }
1670 ldap_memfree(utf8_dn);
1671 return unix_dn;
1672 }
1673
1674 const char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1675 LDAPMessage *entry)
1676 {
1677 char *utf8_dn, *unix_dn;
1678 size_t converted_size;
1679
1680 utf8_dn = ldap_get_dn(ld, entry);
1681 if (!utf8_dn) {
1682 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1683 return NULL;
1684 }
1685 if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1686 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1687 "[%s]\n", utf8_dn));
1688 return NULL;
1689 }
1690 ldap_memfree(utf8_dn);
1691 return unix_dn;
1692 }
1693
1694 /*******************************************************************
1695 Check if root-dse has a certain Control or Extension
1696 ********************************************************************/
1697
1698 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1699 {
1700 LDAPMessage *msg = NULL;
1701 LDAPMessage *entry = NULL;
1702 char **values = NULL;
1703 int rc, num_result, num_values, i;
1704 bool result = False;
1705
1706 if (!attrs[0]) {
1707 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1708 return False;
1709 }
1710
1711 if (!strequal(attrs[0], "supportedExtension") &&
1712 !strequal(attrs[0], "supportedControl") &&
1713 !strequal(attrs[0], "namingContexts")) {
1714 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1715 return False;
1716 }
1717
1718 rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1719 "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1720
1721 if (rc != LDAP_SUCCESS) {
1722 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1723 return False;
1724 }
1725
1726 num_result = ldap_count_entries(ld, msg);
1727
1728 if (num_result != 1) {
1729 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1730 goto done;
1731 }
1732
1733 entry = ldap_first_entry(ld, msg);
1734
1735 if (entry == NULL) {
1736 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1737 goto done;
1738 }
1739
1740 values = ldap_get_values(ld, entry, attrs[0]);
1741
1742 if (values == NULL) {
1743 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1744 goto done;
1745 }
1746
1747 num_values = ldap_count_values(values);
1748
1749 if (num_values == 0) {
1750 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1751 goto done;
1752 }
1753
1754 for (i=0; i<num_values; i++) {
1755 if (strcmp(values[i], value) == 0)
1756 result = True;
1757 }
1758
1759
1760 done:
1761 if (values != NULL)
1762 ldap_value_free(values);
1763 if (msg != NULL)
1764 ldap_msgfree(msg);
1765
1766 return result;
1767
1768 }
1769
1770 /*******************************************************************
1771 Check if LDAP-Server supports a certain Control (OID in string format)
1772 ********************************************************************/
1773
1774 bool smbldap_has_control(LDAP *ld, const char *control)
1775 {
1776 const char *attrs[] = { "supportedControl", NULL };
1777 return smbldap_check_root_dse(ld, attrs, control);
1778 }
1779
1780 /*******************************************************************
1781 Check if LDAP-Server supports a certain Extension (OID in string format)
1782 ********************************************************************/
1783
1784 bool smbldap_has_extension(LDAP *ld, const char *extension)
1785 {
1786 const char *attrs[] = { "supportedExtension", NULL };
1787 return smbldap_check_root_dse(ld, attrs, extension);
1788 }
1789
1790 /*******************************************************************
1791 Check if LDAP-Server holds a given namingContext
1792 ********************************************************************/
1793
1794 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1795 {
1796 const char *attrs[] = { "namingContexts", NULL };
1797 return smbldap_check_root_dse(ld, attrs, naming_context);
1798 }
1799
1800 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1801 {
1802 ldap_state->anonymous = anon;
1803
1804 /* free any previously set credential */
1805
1806 SAFE_FREE(ldap_state->bind_dn);
1807 if (ldap_state->bind_secret) {
1808 /* make sure secrets are zeroed out of memory */
1809 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1810 SAFE_FREE(ldap_state->bind_secret);
1811 }
1812
1813 if ( ! anon) {
1814 ldap_state->bind_dn = SMB_STRDUP(dn);
1815 ldap_state->bind_secret = SMB_STRDUP(secret);
1816 }
1817
1818 return True;
1819 }
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