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Cleanup size_t return values in convert_string_allocate
[Samba.git] / source / lib / smbldap.c
blob65a039b119190ca0a5e336995cb2b46ccee88c29
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
302 if (attribute == NULL) {
303 return NULL;
304 }
305
306 values = ldap_get_values(ldap_struct, entry, attribute);
307
308 if (values == NULL) {
309 DEBUG(10, ("attribute %s does not exist\n", attribute));
310 return NULL;
311 }
312
313 if (ldap_count_values(values) != 1) {
314 DEBUG(10, ("attribute %s has %d values, expected only one\n",
315 attribute, ldap_count_values(values)));
316 ldap_value_free(values);
317 return NULL;
318 }
319
320 if (pull_utf8_talloc(mem_ctx, &result, values[0]) == (size_t)-1) {
321 DEBUG(10, ("pull_utf8_talloc failed\n"));
322 ldap_value_free(values);
323 return NULL;
324 }
325
326 ldap_value_free(values);
327
328 #ifdef DEBUG_PASSWORDS
329 DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
330 attribute, result));
331 #endif
332 return result;
333 }
334
335 static int ldapmsg_destructor(LDAPMessage **result) {
336 ldap_msgfree(*result);
337 return 0;
338 }
339
340 void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
341 {
342 LDAPMessage **handle;
343
344 if (result == NULL) {
345 return;
346 }
347
348 handle = TALLOC_P(mem_ctx, LDAPMessage *);
349 SMB_ASSERT(handle != NULL);
350
351 *handle = result;
352 talloc_set_destructor(handle, ldapmsg_destructor);
353 }
354
355 static int ldapmod_destructor(LDAPMod ***mod) {
356 ldap_mods_free(*mod, True);
357 return 0;
358 }
359
360 void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
361 {
362 LDAPMod ***handle;
363
364 if (mod == NULL) {
365 return;
366 }
367
368 handle = TALLOC_P(mem_ctx, LDAPMod **);
369 SMB_ASSERT(handle != NULL);
370
371 *handle = mod;
372 talloc_set_destructor(handle, ldapmod_destructor);
373 }
374
375 /************************************************************************
376 Routine to manage the LDAPMod structure array
377 manage memory used by the array, by each struct, and values
378 ***********************************************************************/
379
380 void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
381 {
382 LDAPMod **mods;
383 int i;
384 int j;
385
386 mods = *modlist;
387
388 /* sanity checks on the mod values */
389
390 if (attribute == NULL || *attribute == '\0') {
391 return;
392 }
393
394 #if 0 /* commented out after discussion with abartlet. Do not reenable.
395 left here so other do not re-add similar code --jerry */
396 if (value == NULL || *value == '\0')
397 return;
398 #endif
399
400 if (mods == NULL) {
401 mods = SMB_MALLOC_P(LDAPMod *);
402 if (mods == NULL) {
403 smb_panic("smbldap_set_mod: out of memory!");
404 /* notreached. */
405 }
406 mods[0] = NULL;
407 }
408
409 for (i = 0; mods[i] != NULL; ++i) {
410 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
411 break;
412 }
413
414 if (mods[i] == NULL) {
415 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
416 if (mods == NULL) {
417 smb_panic("smbldap_set_mod: out of memory!");
418 /* notreached. */
419 }
420 mods[i] = SMB_MALLOC_P(LDAPMod);
421 if (mods[i] == NULL) {
422 smb_panic("smbldap_set_mod: out of memory!");
423 /* notreached. */
424 }
425 mods[i]->mod_op = modop;
426 mods[i]->mod_values = NULL;
427 mods[i]->mod_type = SMB_STRDUP(attribute);
428 mods[i + 1] = NULL;
429 }
430
431 if (value != NULL) {
432 char *utf8_value = NULL;
433
434 j = 0;
435 if (mods[i]->mod_values != NULL) {
436 for (; mods[i]->mod_values[j] != NULL; j++);
437 }
438 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
439
440 if (mods[i]->mod_values == NULL) {
441 smb_panic("smbldap_set_mod: out of memory!");
442 /* notreached. */
443 }
444
445 if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) {
446 smb_panic("smbldap_set_mod: String conversion failure!");
447 /* notreached. */
448 }
449
450 mods[i]->mod_values[j] = utf8_value;
451
452 mods[i]->mod_values[j + 1] = NULL;
453 }
454 *modlist = mods;
455 }
456
457 /**********************************************************************
458 Set attribute to newval in LDAP, regardless of what value the
459 attribute had in LDAP before.
460 *********************************************************************/
461
462 void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
463 LDAPMod ***mods,
464 const char *attribute, const char *newval)
465 {
466 char oldval[2048]; /* current largest allowed value is mungeddial */
467 bool existed;
468
469 if (attribute == NULL) {
470 /* This can actually happen for ldapsam_compat where we for
471 * example don't have a password history */
472 return;
473 }
474
475 if (existing != NULL) {
476 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
477 } else {
478 existed = False;
479 *oldval = '\0';
480 }
481
482 /* all of our string attributes are case insensitive */
483
484 if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
485
486 /* Believe it or not, but LDAP will deny a delete and
487 an add at the same time if the values are the
488 same... */
489 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
490 return;
491 }
492
493 if (existed) {
494 /* There has been no value before, so don't delete it.
495 * Here's a possible race: We might end up with
496 * duplicate attributes */
497 /* By deleting exactly the value we found in the entry this
498 * should be race-free in the sense that the LDAP-Server will
499 * deny the complete operation if somebody changed the
500 * attribute behind our back. */
501 /* This will also allow modifying single valued attributes
502 * in Novell NDS. In NDS you have to first remove attribute and then
503 * you could add new value */
504
505 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
506 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
507 }
508
509 /* Regardless of the real operation (add or modify)
510 we add the new value here. We rely on deleting
511 the old value, should it exist. */
512
513 if ((newval != NULL) && (strlen(newval) > 0)) {
514 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
515 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
516 }
517 }
518
519 /**********************************************************************
520 Some varients of the LDAP rebind code do not pass in the third 'arg'
521 pointer to a void*, so we try and work around it by assuming that the
522 value of the 'LDAP *' pointer is the same as the one we had passed in
523 **********************************************************************/
524
525 struct smbldap_state_lookup {
526 LDAP *ld;
527 struct smbldap_state *smbldap_state;
528 struct smbldap_state_lookup *prev, *next;
529 };
530
531 static struct smbldap_state_lookup *smbldap_state_lookup_list;
532
533 static struct smbldap_state *smbldap_find_state(LDAP *ld)
534 {
535 struct smbldap_state_lookup *t;
536
537 for (t = smbldap_state_lookup_list; t; t = t->next) {
538 if (t->ld == ld) {
539 return t->smbldap_state;
540 }
541 }
542 return NULL;
543 }
544
545 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
546 {
547 struct smbldap_state_lookup *t;
548
549 for (t = smbldap_state_lookup_list; t; t = t->next) {
550 if (t->smbldap_state == smbldap_state) {
551 DLIST_REMOVE(smbldap_state_lookup_list, t);
552 SAFE_FREE(t);
553 return;
554 }
555 }
556 }
557
558 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
559 {
560 struct smbldap_state *tmp_ldap_state;
561 struct smbldap_state_lookup *t;
562
563 if ((tmp_ldap_state = smbldap_find_state(ld))) {
564 SMB_ASSERT(tmp_ldap_state == smbldap_state);
565 return;
566 }
567
568 t = SMB_XMALLOC_P(struct smbldap_state_lookup);
569 ZERO_STRUCTP(t);
570
571 DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
572 t->ld = ld;
573 t->smbldap_state = smbldap_state;
574 }
575
576 /********************************************************************
577 start TLS on an existing LDAP connection
578 *******************************************************************/
579
580 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
581 {
582 int rc;
583
584 if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
585 return LDAP_SUCCESS;
586 }
587
588 #ifdef LDAP_OPT_X_TLS
589 if (version != LDAP_VERSION3) {
590 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
591 return LDAP_OPERATIONS_ERROR;
592 }
593
594 if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS) {
595 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
596 ldap_err2string(rc)));
597 return rc;
598 }
599
600 DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
601 return LDAP_SUCCESS;
602 #else
603 DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
604 return LDAP_OPERATIONS_ERROR;
605 #endif
606 }
607
608 /********************************************************************
609 setup a connection to the LDAP server based on a uri
610 *******************************************************************/
611
612 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
613 {
614 int rc;
615
616 DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
617
618 #ifdef HAVE_LDAP_INITIALIZE
619
620 rc = ldap_initialize(ldap_struct, uri);
621 if (rc) {
622 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
623 }
624
625 return rc;
626 #else
627
628 /* Parse the string manually */
629
630 {
631 int port = 0;
632 fstring protocol;
633 fstring host;
634 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
635
636
637 /* skip leading "URL:" (if any) */
638 if ( strnequal( uri, "URL:", 4 ) ) {
639 uri += 4;
640 }
641
642 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
643
644 if (port == 0) {
645 if (strequal(protocol, "ldap")) {
646 port = LDAP_PORT;
647 } else if (strequal(protocol, "ldaps")) {
648 port = LDAPS_PORT;
649 } else {
650 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
651 }
652 }
653
654 if ((*ldap_struct = ldap_init(host, port)) == NULL) {
655 DEBUG(0, ("ldap_init failed !\n"));
656 return LDAP_OPERATIONS_ERROR;
657 }
658
659 if (strequal(protocol, "ldaps")) {
660 #ifdef LDAP_OPT_X_TLS
661 int tls = LDAP_OPT_X_TLS_HARD;
662 if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
663 {
664 DEBUG(0, ("Failed to setup a TLS session\n"));
665 }
666
667 DEBUG(3,("LDAPS option set...!\n"));
668 #else
669 DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
670 return LDAP_OPERATIONS_ERROR;
671 #endif /* LDAP_OPT_X_TLS */
672 }
673
674 }
675 #endif /* HAVE_LDAP_INITIALIZE */
676 return LDAP_SUCCESS;
677 }
678
679 /********************************************************************
680 try to upgrade to Version 3 LDAP if not already, in either case return current
681 version
682 *******************************************************************/
683
684 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
685 {
686 int version;
687 int rc;
688
689 /* assume the worst */
690 *new_version = LDAP_VERSION2;
691
692 rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
693 if (rc) {
694 return rc;
695 }
696
697 if (version == LDAP_VERSION3) {
698 *new_version = LDAP_VERSION3;
699 return LDAP_SUCCESS;
700 }
701
702 /* try upgrade */
703 version = LDAP_VERSION3;
704 rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
705 if (rc) {
706 return rc;
707 }
708
709 *new_version = LDAP_VERSION3;
710 return LDAP_SUCCESS;
711 }
712
713 /*******************************************************************
714 open a connection to the ldap server (just until the bind)
715 ******************************************************************/
716
717 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
718 {
719 int rc, version;
720
721 rc = smb_ldap_setup_conn(ldap_struct, uri);
722 if (rc) {
723 return rc;
724 }
725
726 rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
727 if (rc) {
728 return rc;
729 }
730
731 rc = smb_ldap_start_tls(*ldap_struct, version);
732 if (rc) {
733 return rc;
734 }
735
736 return LDAP_SUCCESS;
737 }
738
739 /*******************************************************************
740 open a connection to the ldap server.
741 ******************************************************************/
742 static int smbldap_open_connection (struct smbldap_state *ldap_state)
743
744 {
745 int rc = LDAP_SUCCESS;
746 int version;
747 LDAP **ldap_struct = &ldap_state->ldap_struct;
748
749 rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
750 if (rc) {
751 return rc;
752 }
753
754 /* Store the LDAP pointer in a lookup list */
755
756 smbldap_store_state(*ldap_struct, ldap_state);
757
758 /* Upgrade to LDAPv3 if possible */
759
760 rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
761 if (rc) {
762 return rc;
763 }
764
765 /* Start TLS if required */
766
767 rc = smb_ldap_start_tls(*ldap_struct, version);
768 if (rc) {
769 return rc;
770 }
771
772 DEBUG(2, ("smbldap_open_connection: connection opened\n"));
773 return rc;
774 }
775
776 /*******************************************************************
777 a rebind function for authenticated referrals
778 This version takes a void* that we can shove useful stuff in :-)
779 ******************************************************************/
780 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
781 #else
782 static int rebindproc_with_state (LDAP * ld, char **whop, char **credp,
783 int *methodp, int freeit, void *arg)
784 {
785 struct smbldap_state *ldap_state = arg;
786
787 /** @TODO Should we be doing something to check what servers we rebind to?
788 Could we get a referral to a machine that we don't want to give our
789 username and password to? */
790
791 if (freeit) {
792 SAFE_FREE(*whop);
793 if (*credp) {
794 memset(*credp, '\0', strlen(*credp));
795 }
796 SAFE_FREE(*credp);
797 } else {
798 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
799 ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
800
801 if (ldap_state->anonymous) {
802 *whop = NULL;
803 *credp = NULL;
804 } else {
805 *whop = SMB_STRDUP(ldap_state->bind_dn);
806 if (!*whop) {
807 return LDAP_NO_MEMORY;
808 }
809 *credp = SMB_STRDUP(ldap_state->bind_secret);
810 if (!*credp) {
811 SAFE_FREE(*whop);
812 return LDAP_NO_MEMORY;
813 }
814 }
815 *methodp = LDAP_AUTH_SIMPLE;
816 }
817
818 GetTimeOfDay(&ldap_state->last_rebind);
819
820 return 0;
821 }
822 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
823
824 /*******************************************************************
825 a rebind function for authenticated referrals
826 This version takes a void* that we can shove useful stuff in :-)
827 and actually does the connection.
828 ******************************************************************/
829 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
830 static int rebindproc_connect_with_state (LDAP *ldap_struct,
831 LDAP_CONST char *url,
832 ber_tag_t request,
833 ber_int_t msgid, void *arg)
834 {
835 struct smbldap_state *ldap_state =
836 (struct smbldap_state *)arg;
837 int rc;
838 int version;
839
840 DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
841 url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
842
843 /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
844 * itself) before rebinding to another LDAP server to avoid to expose
845 * our credentials. At least *try* to secure the connection - Guenther */
846
847 smb_ldap_upgrade_conn(ldap_struct, &version);
848 smb_ldap_start_tls(ldap_struct, version);
849
850 /** @TODO Should we be doing something to check what servers we rebind to?
851 Could we get a referral to a machine that we don't want to give our
852 username and password to? */
853
854 rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
855
856 /* only set the last rebind timestamp when we did rebind after a
857 * non-read LDAP operation. That way we avoid the replication sleep
858 * after a simple redirected search operation - Guenther */
859
860 switch (request) {
861
862 case LDAP_REQ_MODIFY:
863 case LDAP_REQ_ADD:
864 case LDAP_REQ_DELETE:
865 case LDAP_REQ_MODDN:
866 case LDAP_REQ_EXTENDED:
867 DEBUG(10,("rebindproc_connect_with_state: "
868 "setting last_rebind timestamp "
869 "(req: 0x%02x)\n", (unsigned int)request));
870 GetTimeOfDay(&ldap_state->last_rebind);
871 break;
872 default:
873 ZERO_STRUCT(ldap_state->last_rebind);
874 break;
875 }
876
877 return rc;
878 }
879 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
880
881 /*******************************************************************
882 Add a rebind function for authenticated referrals
883 ******************************************************************/
884 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
885 #else
886 # if LDAP_SET_REBIND_PROC_ARGS == 2
887 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
888 int *method, int freeit )
889 {
890 struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
891
892 return rebindproc_with_state(ldap_struct, whop, credp,
893 method, freeit, ldap_state);
894
895 }
896 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
897 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
898
899 /*******************************************************************
900 a rebind function for authenticated referrals
901 this also does the connection, but no void*.
902 ******************************************************************/
903 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
904 # if LDAP_SET_REBIND_PROC_ARGS == 2
905 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
906 ber_int_t msgid)
907 {
908 struct smbldap_state *ldap_state = smbldap_find_state(ld);
909
910 return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
911 ldap_state);
912 }
913 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
914 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
915
916 /*******************************************************************
917 connect to the ldap server under system privilege.
918 ******************************************************************/
919 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
920 {
921 int rc;
922 int version;
923
924 if (!ldap_state->anonymous && !ldap_state->bind_dn) {
925
926 /* get the default dn and password only if they are not set already */
927 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
928 DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
929 return LDAP_INVALID_CREDENTIALS;
930 }
931 }
932
933 /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
934 (OpenLDAP) doesnt' seem to support it */
935
936 DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
937 ldap_state->uri, ldap_state->bind_dn));
938
939 #ifdef HAVE_LDAP_SET_REBIND_PROC
940 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
941 # if LDAP_SET_REBIND_PROC_ARGS == 2
942 ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
943 # endif
944 # if LDAP_SET_REBIND_PROC_ARGS == 3
945 ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
946 # endif
947 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
948 # if LDAP_SET_REBIND_PROC_ARGS == 2
949 ldap_set_rebind_proc(ldap_struct, &rebindproc);
950 # endif
951 # if LDAP_SET_REBIND_PROC_ARGS == 3
952 ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
953 # endif
954 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
955 #endif
956
957 rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
958
959 if (rc != LDAP_SUCCESS) {
960 char *ld_error = NULL;
961 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
962 &ld_error);
963 DEBUG(ldap_state->num_failures ? 2 : 0,
964 ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
965 ldap_state->uri,
966 ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
967 ldap_err2string(rc),
968 ld_error ? ld_error : "(unknown)"));
969 SAFE_FREE(ld_error);
970 ldap_state->num_failures++;
971 return rc;
972 }
973
974 ldap_state->num_failures = 0;
975 ldap_state->paged_results = False;
976
977 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
978
979 if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
980 ldap_state->paged_results = True;
981 }
982
983 DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
984 DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
985 ldap_state->paged_results ? "does" : "does not"));
986 return rc;
987 }
988
989 static void smbldap_idle_fn(struct event_context *event_ctx,
990 struct timed_event *te,
991 const struct timeval *now,
992 void *private_data);
993
994 /**********************************************************************
995 Connect to LDAP server (called before every ldap operation)
996 *********************************************************************/
997 static int smbldap_open(struct smbldap_state *ldap_state)
998 {
999 int rc, opt_rc;
1000 bool reopen = False;
1001 SMB_ASSERT(ldap_state);
1002
1003 #ifndef NO_LDAP_SECURITY
1004 if (geteuid() != 0) {
1005 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
1006 return LDAP_INSUFFICIENT_ACCESS;
1007 }
1008 #endif
1009
1010 if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1011
1012 #ifdef HAVE_UNIXSOCKET
1013 struct sockaddr_un addr;
1014 #else
1015 struct sockaddr addr;
1016 #endif
1017 socklen_t len = sizeof(addr);
1018 int sd;
1019
1020 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1021 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1022 reopen = True;
1023
1024 #ifdef HAVE_UNIXSOCKET
1025 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1026 reopen = True;
1027 #endif
1028 if (reopen) {
1029 /* the other end has died. reopen. */
1030 ldap_unbind(ldap_state->ldap_struct);
1031 ldap_state->ldap_struct = NULL;
1032 ldap_state->last_ping = (time_t)0;
1033 } else {
1034 ldap_state->last_ping = time(NULL);
1035 }
1036 }
1037
1038 if (ldap_state->ldap_struct != NULL) {
1039 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1040 return LDAP_SUCCESS;
1041 }
1042
1043 if ((rc = smbldap_open_connection(ldap_state))) {
1044 return rc;
1045 }
1046
1047 if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1048 ldap_unbind(ldap_state->ldap_struct);
1049 ldap_state->ldap_struct = NULL;
1050 return rc;
1051 }
1052
1053
1054 ldap_state->last_ping = time(NULL);
1055 ldap_state->pid = sys_getpid();
1056
1057 TALLOC_FREE(ldap_state->idle_event);
1058
1059 if (ldap_state->event_context != NULL) {
1060 ldap_state->idle_event = event_add_timed(
1061 ldap_state->event_context, NULL,
1062 timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1063 "smbldap_idle_fn", smbldap_idle_fn, ldap_state);
1064 }
1065
1066 DEBUG(4,("The LDAP server is successfully connected\n"));
1067
1068 return LDAP_SUCCESS;
1069 }
1070
1071 /**********************************************************************
1072 Disconnect from LDAP server
1073 *********************************************************************/
1074 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1075 {
1076 if (!ldap_state)
1077 return NT_STATUS_INVALID_PARAMETER;
1078
1079 if (ldap_state->ldap_struct != NULL) {
1080 ldap_unbind(ldap_state->ldap_struct);
1081 ldap_state->ldap_struct = NULL;
1082 }
1083
1084 smbldap_delete_state(ldap_state);
1085
1086 DEBUG(5,("The connection to the LDAP server was closed\n"));
1087 /* maybe free the results here --metze */
1088
1089 return NT_STATUS_OK;
1090 }
1091
1092 static bool got_alarm;
1093
1094 static void (*old_handler)(int);
1095
1096 static void gotalarm_sig(int dummy)
1097 {
1098 got_alarm = True;
1099 }
1100
1101 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1102 int *attempts, time_t endtime)
1103 {
1104 time_t now = time(NULL);
1105 int open_rc = LDAP_SERVER_DOWN;
1106
1107 if (*rc != LDAP_SERVER_DOWN)
1108 goto no_next;
1109
1110 if (now >= endtime) {
1111 smbldap_close(ldap_state);
1112 *rc = LDAP_TIMEOUT;
1113 goto no_next;
1114 }
1115
1116 if (*attempts == 0) {
1117 got_alarm = False;
1118 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1119 alarm(endtime - now);
1120
1121 if (ldap_state->pid != sys_getpid())
1122 smbldap_close(ldap_state);
1123 }
1124
1125 while (1) {
1126
1127 if (*attempts != 0)
1128 smb_msleep(1000);
1129
1130 *attempts += 1;
1131
1132 open_rc = smbldap_open(ldap_state);
1133
1134 if (open_rc == LDAP_SUCCESS) {
1135 ldap_state->last_use = now;
1136 return True;
1137 }
1138
1139 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1140 /* The fact that we are non-root or any other
1141 * access-denied condition will not change in the next
1142 * round of trying */
1143 *rc = open_rc;
1144 break;
1145 }
1146
1147 if (got_alarm) {
1148 *rc = LDAP_TIMEOUT;
1149 break;
1150 }
1151
1152 if (open_rc != LDAP_SUCCESS) {
1153 DEBUG(1, ("Connection to LDAP server failed for the "
1154 "%d try!\n", *attempts));
1155 }
1156 }
1157
1158 no_next:
1159 CatchSignal(SIGALRM, old_handler);
1160 alarm(0);
1161 ldap_state->last_use = now;
1162 return False;
1163 }
1164
1165 /*********************************************************************
1166 ********************************************************************/
1167
1168 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1169 const char *base, int scope, const char *filter,
1170 const char *attrs[], int attrsonly,
1171 LDAPControl **sctrls, LDAPControl **cctrls,
1172 int sizelimit, LDAPMessage **res)
1173 {
1174 int rc = LDAP_SERVER_DOWN;
1175 int attempts = 0;
1176 char *utf8_filter;
1177 time_t endtime = time(NULL)+lp_ldap_timeout();
1178 struct timeval timeout;
1179
1180 SMB_ASSERT(ldap_state);
1181
1182 DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1183 "scope => [%d]\n", base, filter, scope));
1184
1185 if (ldap_state->last_rebind.tv_sec > 0) {
1186 struct timeval tval;
1187 SMB_BIG_INT tdiff = 0;
1188 int sleep_time = 0;
1189
1190 ZERO_STRUCT(tval);
1191 GetTimeOfDay(&tval);
1192
1193 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1194 tdiff /= 1000; /* Convert to milliseconds. */
1195
1196 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1197 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1198
1199 if (sleep_time > 0) {
1200 /* we wait for the LDAP replication */
1201 DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1202 "for LDAP replication.\n",sleep_time));
1203 smb_msleep(sleep_time);
1204 DEBUG(5,("smbldap_search_ext: go on!\n"));
1205 }
1206 ZERO_STRUCT(ldap_state->last_rebind);
1207 }
1208
1209 if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
1210 return LDAP_NO_MEMORY;
1211 }
1212
1213 /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1214 timeout.tv_sec = lp_ldap_timeout();
1215 timeout.tv_usec = 0;
1216
1217 /* Setup alarm timeout.... Do we need both of these ? JRA.
1218 * Yes, I think we do need both of these. The server timeout only
1219 * covers the case where the server's operation takes too long. It
1220 * does not cover the case where the request hangs on its way to the
1221 * server. The server side timeout is not strictly necessary, it's
1222 * just a bit more kind to the server. VL. */
1223
1224 got_alarm = 0;
1225 CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1226 alarm(lp_ldap_timeout());
1227 /* End setup timeout. */
1228
1229 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1230 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1231 utf8_filter,
1232 CONST_DISCARD(char **, attrs),
1233 attrsonly, sctrls, cctrls, &timeout,
1234 sizelimit, res);
1235 if (rc != LDAP_SUCCESS) {
1236 char *ld_error = NULL;
1237 int ld_errno;
1238
1239 ldap_get_option(ldap_state->ldap_struct,
1240 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1241
1242 ldap_get_option(ldap_state->ldap_struct,
1243 LDAP_OPT_ERROR_STRING, &ld_error);
1244 DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1245 "(%s)\n", base, ld_errno,
1246 ldap_err2string(rc),
1247 ld_error ? ld_error : "unknown"));
1248 SAFE_FREE(ld_error);
1249
1250 if (ld_errno == LDAP_SERVER_DOWN) {
1251 ldap_unbind(ldap_state->ldap_struct);
1252 ldap_state->ldap_struct = NULL;
1253 }
1254 }
1255 }
1256
1257 SAFE_FREE(utf8_filter);
1258
1259 /* Teardown timeout. */
1260 CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1261 alarm(0);
1262
1263 if (got_alarm != 0)
1264 return LDAP_TIMELIMIT_EXCEEDED;
1265
1266 return rc;
1267 }
1268
1269 int smbldap_search(struct smbldap_state *ldap_state,
1270 const char *base, int scope, const char *filter,
1271 const char *attrs[], int attrsonly,
1272 LDAPMessage **res)
1273 {
1274 return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1275 attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1276 }
1277
1278 int smbldap_search_paged(struct smbldap_state *ldap_state,
1279 const char *base, int scope, const char *filter,
1280 const char **attrs, int attrsonly, int pagesize,
1281 LDAPMessage **res, void **cookie)
1282 {
1283 LDAPControl pr;
1284 LDAPControl **rcontrols;
1285 LDAPControl *controls[2] = { NULL, NULL};
1286 BerElement *cookie_be = NULL;
1287 struct berval *cookie_bv = NULL;
1288 int tmp = 0, i, rc;
1289 bool critical = True;
1290
1291 *res = NULL;
1292
1293 DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1294 "scope => [%d], pagesize => [%d]\n",
1295 base, filter, scope, pagesize));
1296
1297 cookie_be = ber_alloc_t(LBER_USE_DER);
1298 if (cookie_be == NULL) {
1299 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1300 "NULL\n"));
1301 return LDAP_NO_MEMORY;
1302 }
1303
1304 /* construct cookie */
1305 if (*cookie != NULL) {
1306 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1307 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1308 *cookie = NULL;
1309 } else {
1310 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1311 }
1312 ber_flatten(cookie_be, &cookie_bv);
1313
1314 pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1315 pr.ldctl_iscritical = (char) critical;
1316 pr.ldctl_value.bv_len = cookie_bv->bv_len;
1317 pr.ldctl_value.bv_val = cookie_bv->bv_val;
1318
1319 controls[0] = &pr;
1320 controls[1] = NULL;
1321
1322 rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1323 0, controls, NULL, LDAP_NO_LIMIT, res);
1324
1325 ber_free(cookie_be, 1);
1326 ber_bvfree(cookie_bv);
1327
1328 if (rc != 0) {
1329 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1330 "failed with [%s]\n", filter, ldap_err2string(rc)));
1331 goto done;
1332 }
1333
1334 DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1335
1336 rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1337 NULL, NULL, &rcontrols, 0);
1338 if (rc != 0) {
1339 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1340 "with [%s]\n", ldap_err2string(rc)));
1341 goto done;
1342 }
1343
1344 if (rcontrols == NULL)
1345 goto done;
1346
1347 for (i=0; rcontrols[i]; i++) {
1348
1349 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1350 continue;
1351
1352 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1353 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1354 /* the berval is the cookie, but must be freed when it is all
1355 done */
1356 if (cookie_bv->bv_len)
1357 *cookie=ber_bvdup(cookie_bv);
1358 else
1359 *cookie=NULL;
1360 ber_bvfree(cookie_bv);
1361 ber_free(cookie_be, 1);
1362 break;
1363 }
1364 ldap_controls_free(rcontrols);
1365 done:
1366 return rc;
1367 }
1368
1369 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1370 {
1371 int rc = LDAP_SERVER_DOWN;
1372 int attempts = 0;
1373 char *utf8_dn;
1374 time_t endtime = time(NULL)+lp_ldap_timeout();
1375
1376 SMB_ASSERT(ldap_state);
1377
1378 DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1379
1380 if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1381 return LDAP_NO_MEMORY;
1382 }
1383
1384 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1385 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1386 if (rc != LDAP_SUCCESS) {
1387 char *ld_error = NULL;
1388 int ld_errno;
1389
1390 ldap_get_option(ldap_state->ldap_struct,
1391 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1392
1393 ldap_get_option(ldap_state->ldap_struct,
1394 LDAP_OPT_ERROR_STRING, &ld_error);
1395 DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1396 "(%s)\n", dn, ld_errno,
1397 ldap_err2string(rc),
1398 ld_error ? ld_error : "unknown"));
1399 SAFE_FREE(ld_error);
1400
1401 if (ld_errno == LDAP_SERVER_DOWN) {
1402 ldap_unbind(ldap_state->ldap_struct);
1403 ldap_state->ldap_struct = NULL;
1404 }
1405 }
1406 }
1407
1408 SAFE_FREE(utf8_dn);
1409 return rc;
1410 }
1411
1412 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1413 {
1414 int rc = LDAP_SERVER_DOWN;
1415 int attempts = 0;
1416 char *utf8_dn;
1417 time_t endtime = time(NULL)+lp_ldap_timeout();
1418
1419 SMB_ASSERT(ldap_state);
1420
1421 DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1422
1423 if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1424 return LDAP_NO_MEMORY;
1425 }
1426
1427 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1428 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1429 if (rc != LDAP_SUCCESS) {
1430 char *ld_error = NULL;
1431 int ld_errno;
1432
1433 ldap_get_option(ldap_state->ldap_struct,
1434 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1435
1436 ldap_get_option(ldap_state->ldap_struct,
1437 LDAP_OPT_ERROR_STRING, &ld_error);
1438 DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1439 "(%s)\n", dn, ld_errno,
1440 ldap_err2string(rc),
1441 ld_error ? ld_error : "unknown"));
1442 SAFE_FREE(ld_error);
1443
1444 if (ld_errno == LDAP_SERVER_DOWN) {
1445 ldap_unbind(ldap_state->ldap_struct);
1446 ldap_state->ldap_struct = NULL;
1447 }
1448 }
1449 }
1450
1451 SAFE_FREE(utf8_dn);
1452 return rc;
1453 }
1454
1455 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1456 {
1457 int rc = LDAP_SERVER_DOWN;
1458 int attempts = 0;
1459 char *utf8_dn;
1460 time_t endtime = time(NULL)+lp_ldap_timeout();
1461
1462 SMB_ASSERT(ldap_state);
1463
1464 DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1465
1466 if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1467 return LDAP_NO_MEMORY;
1468 }
1469
1470 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1471 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1472 if (rc != LDAP_SUCCESS) {
1473 char *ld_error = NULL;
1474 int ld_errno;
1475
1476 ldap_get_option(ldap_state->ldap_struct,
1477 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1478
1479 ldap_get_option(ldap_state->ldap_struct,
1480 LDAP_OPT_ERROR_STRING, &ld_error);
1481 DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1482 "(%s)\n", dn, ld_errno,
1483 ldap_err2string(rc),
1484 ld_error ? ld_error : "unknown"));
1485 SAFE_FREE(ld_error);
1486
1487 if (ld_errno == LDAP_SERVER_DOWN) {
1488 ldap_unbind(ldap_state->ldap_struct);
1489 ldap_state->ldap_struct = NULL;
1490 }
1491 }
1492 }
1493
1494 SAFE_FREE(utf8_dn);
1495 return rc;
1496 }
1497
1498 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1499 LDAP_CONST char *reqoid, struct berval *reqdata,
1500 LDAPControl **serverctrls, LDAPControl **clientctrls,
1501 char **retoidp, struct berval **retdatap)
1502 {
1503 int rc = LDAP_SERVER_DOWN;
1504 int attempts = 0;
1505 time_t endtime = time(NULL)+lp_ldap_timeout();
1506
1507 if (!ldap_state)
1508 return (-1);
1509
1510 while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1511 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1512 reqdata, serverctrls,
1513 clientctrls, retoidp, retdatap);
1514 if (rc != LDAP_SUCCESS) {
1515 char *ld_error = NULL;
1516 int ld_errno;
1517
1518 ldap_get_option(ldap_state->ldap_struct,
1519 LDAP_OPT_ERROR_NUMBER, &ld_errno);
1520
1521 ldap_get_option(ldap_state->ldap_struct,
1522 LDAP_OPT_ERROR_STRING, &ld_error);
1523 DEBUG(10, ("Extended operation failed with error: "
1524 "%d (%s) (%s)\n", ld_errno,
1525 ldap_err2string(rc),
1526 ld_error ? ld_error : "unknown"));
1527 SAFE_FREE(ld_error);
1528
1529 if (ld_errno == LDAP_SERVER_DOWN) {
1530 ldap_unbind(ldap_state->ldap_struct);
1531 ldap_state->ldap_struct = NULL;
1532 }
1533 }
1534 }
1535
1536 return rc;
1537 }
1538
1539 /*******************************************************************
1540 run the search by name.
1541 ******************************************************************/
1542 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1543 const char *filter, const char **search_attr,
1544 LDAPMessage ** result)
1545 {
1546 return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1547 filter, search_attr, 0, result);
1548 }
1549
1550 static void smbldap_idle_fn(struct event_context *event_ctx,
1551 struct timed_event *te,
1552 const struct timeval *now,
1553 void *private_data)
1554 {
1555 struct smbldap_state *state = (struct smbldap_state *)private_data;
1556
1557 TALLOC_FREE(state->idle_event);
1558
1559 if (state->ldap_struct == NULL) {
1560 DEBUG(10,("ldap connection not connected...\n"));
1561 return;
1562 }
1563
1564 if ((state->last_use+SMBLDAP_IDLE_TIME) > now->tv_sec) {
1565 DEBUG(10,("ldap connection not idle...\n"));
1566
1567 state->idle_event = event_add_timed(
1568 event_ctx, NULL,
1569 timeval_add(now, SMBLDAP_IDLE_TIME, 0),
1570 "smbldap_idle_fn", smbldap_idle_fn,
1571 private_data);
1572 return;
1573 }
1574
1575 DEBUG(7,("ldap connection idle...closing connection\n"));
1576 smbldap_close(state);
1577 }
1578
1579 /**********************************************************************
1580 Housekeeping
1581 *********************************************************************/
1582
1583 void smbldap_free_struct(struct smbldap_state **ldap_state)
1584 {
1585 smbldap_close(*ldap_state);
1586
1587 if ((*ldap_state)->bind_secret) {
1588 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1589 }
1590
1591 SAFE_FREE((*ldap_state)->bind_dn);
1592 SAFE_FREE((*ldap_state)->bind_secret);
1593
1594 TALLOC_FREE((*ldap_state)->idle_event);
1595
1596 *ldap_state = NULL;
1597
1598 /* No need to free any further, as it is talloc()ed */
1599 }
1600
1601
1602 /**********************************************************************
1603 Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1604 *********************************************************************/
1605
1606 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1607 const char *location,
1608 struct smbldap_state **smbldap_state)
1609 {
1610 *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1611 if (!*smbldap_state) {
1612 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1613 return NT_STATUS_NO_MEMORY;
1614 }
1615
1616 if (location) {
1617 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1618 } else {
1619 (*smbldap_state)->uri = "ldap://localhost";
1620 }
1621
1622 (*smbldap_state)->event_context = event_ctx;
1623
1624 return NT_STATUS_OK;
1625 }
1626
1627 /*******************************************************************
1628 Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1629 ********************************************************************/
1630 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1631 {
1632 char *utf8_dn, *unix_dn;
1633
1634 utf8_dn = ldap_get_dn(ld, entry);
1635 if (!utf8_dn) {
1636 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1637 return NULL;
1638 }
1639 if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
1640 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
1641 return NULL;
1642 }
1643 ldap_memfree(utf8_dn);
1644 return unix_dn;
1645 }
1646
1647 const char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1648 LDAPMessage *entry)
1649 {
1650 char *utf8_dn, *unix_dn;
1651
1652 utf8_dn = ldap_get_dn(ld, entry);
1653 if (!utf8_dn) {
1654 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1655 return NULL;
1656 }
1657 if (pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn) == (size_t)-1) {
1658 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1659 "[%s]\n", utf8_dn));
1660 return NULL;
1661 }
1662 ldap_memfree(utf8_dn);
1663 return unix_dn;
1664 }
1665
1666 /*******************************************************************
1667 Check if root-dse has a certain Control or Extension
1668 ********************************************************************/
1669
1670 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1671 {
1672 LDAPMessage *msg = NULL;
1673 LDAPMessage *entry = NULL;
1674 char **values = NULL;
1675 int rc, num_result, num_values, i;
1676 bool result = False;
1677
1678 if (!attrs[0]) {
1679 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1680 return False;
1681 }
1682
1683 if (!strequal(attrs[0], "supportedExtension") &&
1684 !strequal(attrs[0], "supportedControl") &&
1685 !strequal(attrs[0], "namingContexts")) {
1686 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1687 return False;
1688 }
1689
1690 rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1691 "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1692
1693 if (rc != LDAP_SUCCESS) {
1694 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1695 return False;
1696 }
1697
1698 num_result = ldap_count_entries(ld, msg);
1699
1700 if (num_result != 1) {
1701 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1702 goto done;
1703 }
1704
1705 entry = ldap_first_entry(ld, msg);
1706
1707 if (entry == NULL) {
1708 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1709 goto done;
1710 }
1711
1712 values = ldap_get_values(ld, entry, attrs[0]);
1713
1714 if (values == NULL) {
1715 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1716 goto done;
1717 }
1718
1719 num_values = ldap_count_values(values);
1720
1721 if (num_values == 0) {
1722 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1723 goto done;
1724 }
1725
1726 for (i=0; i<num_values; i++) {
1727 if (strcmp(values[i], value) == 0)
1728 result = True;
1729 }
1730
1731
1732 done:
1733 if (values != NULL)
1734 ldap_value_free(values);
1735 if (msg != NULL)
1736 ldap_msgfree(msg);
1737
1738 return result;
1739
1740 }
1741
1742 /*******************************************************************
1743 Check if LDAP-Server supports a certain Control (OID in string format)
1744 ********************************************************************/
1745
1746 bool smbldap_has_control(LDAP *ld, const char *control)
1747 {
1748 const char *attrs[] = { "supportedControl", NULL };
1749 return smbldap_check_root_dse(ld, attrs, control);
1750 }
1751
1752 /*******************************************************************
1753 Check if LDAP-Server supports a certain Extension (OID in string format)
1754 ********************************************************************/
1755
1756 bool smbldap_has_extension(LDAP *ld, const char *extension)
1757 {
1758 const char *attrs[] = { "supportedExtension", NULL };
1759 return smbldap_check_root_dse(ld, attrs, extension);
1760 }
1761
1762 /*******************************************************************
1763 Check if LDAP-Server holds a given namingContext
1764 ********************************************************************/
1765
1766 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1767 {
1768 const char *attrs[] = { "namingContexts", NULL };
1769 return smbldap_check_root_dse(ld, attrs, naming_context);
1770 }
1771
1772 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1773 {
1774 ldap_state->anonymous = anon;
1775
1776 /* free any previously set credential */
1777
1778 SAFE_FREE(ldap_state->bind_dn);
1779 if (ldap_state->bind_secret) {
1780 /* make sure secrets are zeroed out of memory */
1781 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1782 SAFE_FREE(ldap_state->bind_secret);
1783 }
1784
1785 if ( ! anon) {
1786 ldap_state->bind_dn = SMB_STRDUP(dn);
1787 ldap_state->bind_secret = SMB_STRDUP(secret);
1788 }
1789
1790 return True;
1791 }
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