Add smbldap_pull_sid
[ira/wip.git] / source3 / lib / smbldap.c
1 /* 
2    Unix SMB/CIFS implementation.
3    LDAP protocol helper functions for SAMBA
4    Copyright (C) Jean Fran├žois 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  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
337                                           const char *attribute,
338                                           TALLOC_CTX *mem_ctx)
339 {
340         char **values;
341         char *result;
342         size_t converted_size;
343         int i, num_values;
344
345         if (attribute == NULL) {
346                 return NULL;
347         }
348
349         values = ldap_get_values(ldap_struct, entry, attribute);
350
351         if (values == NULL) {
352                 DEBUG(10, ("attribute %s does not exist\n", attribute));
353                 return NULL;
354         }
355
356         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
357                 DEBUG(10, ("pull_utf8_talloc failed\n"));
358                 ldap_value_free(values);
359                 return NULL;
360         }
361
362         num_values = ldap_count_values(values);
363
364         for (i=1; i<num_values; i++) {
365                 char *tmp;
366
367                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
368                                       &converted_size)) {
369                         DEBUG(10, ("pull_utf8_talloc failed\n"));
370                         TALLOC_FREE(result);
371                         ldap_value_free(values);
372                         return NULL;
373                 }
374
375                 if (StrCaseCmp(tmp, result) < 0) {
376                         TALLOC_FREE(result);
377                         result = tmp;
378                 } else {
379                         TALLOC_FREE(tmp);
380                 }
381         }
382
383         ldap_value_free(values);
384
385 #ifdef DEBUG_PASSWORDS
386         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
387                      attribute, result));
388 #endif
389         return result;
390 }
391
392  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
393                        struct dom_sid *sid)
394 {
395         struct berval **values;
396         bool ret = False;
397
398         values = ldap_get_values_len(ld, msg, attrib);
399
400         if (!values) {
401                 return false;
402         }
403
404         if (values[0] != NULL) {
405                 ret = sid_parse(values[0]->bv_val, values[0]->bv_len, sid);
406         }
407
408         ldap_value_free_len(values);
409         return ret;
410 }
411
412  static int ldapmsg_destructor(LDAPMessage **result) {
413         ldap_msgfree(*result);
414         return 0;
415 }
416
417  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
418 {
419         LDAPMessage **handle;
420
421         if (result == NULL) {
422                 return;
423         }
424
425         handle = TALLOC_P(mem_ctx, LDAPMessage *);
426         SMB_ASSERT(handle != NULL);
427
428         *handle = result;
429         talloc_set_destructor(handle, ldapmsg_destructor);
430 }
431
432  static int ldapmod_destructor(LDAPMod ***mod) {
433         ldap_mods_free(*mod, True);
434         return 0;
435 }
436
437  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
438 {
439         LDAPMod ***handle;
440
441         if (mod == NULL) {
442                 return;
443         }
444
445         handle = TALLOC_P(mem_ctx, LDAPMod **);
446         SMB_ASSERT(handle != NULL);
447
448         *handle = mod;
449         talloc_set_destructor(handle, ldapmod_destructor);
450 }
451
452 /************************************************************************
453  Routine to manage the LDAPMod structure array
454  manage memory used by the array, by each struct, and values
455  ***********************************************************************/
456
457  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
458 {
459         LDAPMod **mods;
460         int i;
461         int j;
462
463         mods = *modlist;
464
465         /* sanity checks on the mod values */
466
467         if (attribute == NULL || *attribute == '\0') {
468                 return; 
469         }
470
471 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
472            left here so other do not re-add similar code   --jerry */
473         if (value == NULL || *value == '\0')
474                 return;
475 #endif
476
477         if (mods == NULL) {
478                 mods = SMB_MALLOC_P(LDAPMod *);
479                 if (mods == NULL) {
480                         smb_panic("smbldap_set_mod: out of memory!");
481                         /* notreached. */
482                 }
483                 mods[0] = NULL;
484         }
485
486         for (i = 0; mods[i] != NULL; ++i) {
487                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
488                         break;
489         }
490
491         if (mods[i] == NULL) {
492                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
493                 if (mods == NULL) {
494                         smb_panic("smbldap_set_mod: out of memory!");
495                         /* notreached. */
496                 }
497                 mods[i] = SMB_MALLOC_P(LDAPMod);
498                 if (mods[i] == NULL) {
499                         smb_panic("smbldap_set_mod: out of memory!");
500                         /* notreached. */
501                 }
502                 mods[i]->mod_op = modop;
503                 mods[i]->mod_values = NULL;
504                 mods[i]->mod_type = SMB_STRDUP(attribute);
505                 mods[i + 1] = NULL;
506         }
507
508         if (value != NULL) {
509                 char *utf8_value = NULL;
510                 size_t converted_size;
511
512                 j = 0;
513                 if (mods[i]->mod_values != NULL) {
514                         for (; mods[i]->mod_values[j] != NULL; j++);
515                 }
516                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
517                                                
518                 if (mods[i]->mod_values == NULL) {
519                         smb_panic("smbldap_set_mod: out of memory!");
520                         /* notreached. */
521                 }
522
523                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
524                         smb_panic("smbldap_set_mod: String conversion failure!");
525                         /* notreached. */
526                 }
527                 
528                 
529                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
530                 TALLOC_FREE(utf8_value);
531                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
532
533                 mods[i]->mod_values[j + 1] = NULL;
534         }
535         *modlist = mods;
536 }
537
538 /**********************************************************************
539   Set attribute to newval in LDAP, regardless of what value the
540   attribute had in LDAP before.
541 *********************************************************************/
542
543  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
544                       LDAPMod ***mods,
545                       const char *attribute, const char *newval)
546 {
547         char oldval[2048]; /* current largest allowed value is mungeddial */
548         bool existed;
549
550         if (attribute == NULL) {
551                 /* This can actually happen for ldapsam_compat where we for
552                  * example don't have a password history */
553                 return;
554         }
555
556         if (existing != NULL) {
557                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
558         } else {
559                 existed = False;
560                 *oldval = '\0';
561         }
562
563         /* all of our string attributes are case insensitive */
564         
565         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
566                 
567                 /* Believe it or not, but LDAP will deny a delete and
568                    an add at the same time if the values are the
569                    same... */
570                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
571                 return;
572         }
573
574         if (existed) {
575                 /* There has been no value before, so don't delete it.
576                  * Here's a possible race: We might end up with
577                  * duplicate attributes */
578                 /* By deleting exactly the value we found in the entry this
579                  * should be race-free in the sense that the LDAP-Server will
580                  * deny the complete operation if somebody changed the
581                  * attribute behind our back. */
582                 /* This will also allow modifying single valued attributes 
583                  * in Novell NDS. In NDS you have to first remove attribute and then
584                  * you could add new value */
585                 
586                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
587                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
588         }
589
590         /* Regardless of the real operation (add or modify)
591            we add the new value here. We rely on deleting
592            the old value, should it exist. */
593
594         if ((newval != NULL) && (strlen(newval) > 0)) {
595                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
596                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
597         }
598 }
599
600 /**********************************************************************
601  Some varients of the LDAP rebind code do not pass in the third 'arg' 
602  pointer to a void*, so we try and work around it by assuming that the 
603  value of the 'LDAP *' pointer is the same as the one we had passed in
604  **********************************************************************/
605
606 struct smbldap_state_lookup {
607         LDAP *ld;
608         struct smbldap_state *smbldap_state;
609         struct smbldap_state_lookup *prev, *next;
610 };
611
612 static struct smbldap_state_lookup *smbldap_state_lookup_list;
613
614 static struct smbldap_state *smbldap_find_state(LDAP *ld) 
615 {
616         struct smbldap_state_lookup *t;
617
618         for (t = smbldap_state_lookup_list; t; t = t->next) {
619                 if (t->ld == ld) {
620                         return t->smbldap_state;
621                 }
622         }
623         return NULL;
624 }
625
626 static void smbldap_delete_state(struct smbldap_state *smbldap_state) 
627 {
628         struct smbldap_state_lookup *t;
629
630         for (t = smbldap_state_lookup_list; t; t = t->next) {
631                 if (t->smbldap_state == smbldap_state) {
632                         DLIST_REMOVE(smbldap_state_lookup_list, t);
633                         SAFE_FREE(t);
634                         return;
635                 }
636         }
637 }
638
639 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state) 
640 {
641         struct smbldap_state *tmp_ldap_state;
642         struct smbldap_state_lookup *t;
643         
644         if ((tmp_ldap_state = smbldap_find_state(ld))) {
645                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
646                 return;
647         }
648
649         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
650         ZERO_STRUCTP(t);
651         
652         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
653         t->ld = ld;
654         t->smbldap_state = smbldap_state;
655 }
656
657 /********************************************************************
658  start TLS on an existing LDAP connection
659 *******************************************************************/
660
661 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
662
663 #ifdef LDAP_OPT_X_TLS
664         int rc;
665 #endif
666         
667         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
668                 return LDAP_SUCCESS;
669         }
670         
671 #ifdef LDAP_OPT_X_TLS
672         if (version != LDAP_VERSION3) {
673                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
674                 return LDAP_OPERATIONS_ERROR;
675         }
676
677         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
678                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
679                          ldap_err2string(rc)));
680                 return rc;
681         }
682
683         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
684         return LDAP_SUCCESS;
685 #else
686         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
687         return LDAP_OPERATIONS_ERROR;
688 #endif
689 }
690
691 /********************************************************************
692  setup a connection to the LDAP server based on a uri
693 *******************************************************************/
694
695 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
696 {
697         int rc;
698
699         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
700         
701 #ifdef HAVE_LDAP_INITIALIZE
702         
703         rc = ldap_initialize(ldap_struct, uri);
704         if (rc) {
705                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
706         }
707
708         return rc;
709 #else 
710
711         /* Parse the string manually */
712
713         {
714                 int port = 0;
715                 fstring protocol;
716                 fstring host;
717                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
718
719
720                 /* skip leading "URL:" (if any) */
721                 if ( strnequal( uri, "URL:", 4 ) ) {
722                         uri += 4;
723                 }
724                 
725                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
726                 
727                 if (port == 0) {
728                         if (strequal(protocol, "ldap")) {
729                                 port = LDAP_PORT;
730                         } else if (strequal(protocol, "ldaps")) {
731                                 port = LDAPS_PORT;
732                         } else {
733                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
734                         }
735                 }
736                 
737                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
738                         DEBUG(0, ("ldap_init failed !\n"));
739                         return LDAP_OPERATIONS_ERROR;
740                 }
741                 
742                 if (strequal(protocol, "ldaps")) {
743 #ifdef LDAP_OPT_X_TLS
744                         int tls = LDAP_OPT_X_TLS_HARD;
745                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
746                         {
747                                 DEBUG(0, ("Failed to setup a TLS session\n"));
748                         }
749                         
750                         DEBUG(3,("LDAPS option set...!\n"));
751 #else
752                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
753                         return LDAP_OPERATIONS_ERROR;
754 #endif /* LDAP_OPT_X_TLS */
755                 }
756         }
757 #endif /* HAVE_LDAP_INITIALIZE */
758
759
760         /* now set connection timeout */
761 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
762         {
763                 int ct = lp_ldap_connection_timeout()*1000;
764                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
765                 if (rc != LDAP_SUCCESS) {
766                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
767                                 ct, ldap_err2string(rc)));
768                 }
769         }
770 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
771         {
772                 struct timeval ct;
773                 ct.tv_usec = 0;
774                 ct.tv_sec = lp_ldap_connection_timeout();
775                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
776                 if (rc != LDAP_SUCCESS) {
777                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
778                                 (int)ct.tv_sec, ldap_err2string(rc)));
779                 }
780         }
781 #endif
782
783         return LDAP_SUCCESS;
784 }
785
786 /********************************************************************
787  try to upgrade to Version 3 LDAP if not already, in either case return current
788  version 
789  *******************************************************************/
790
791 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version) 
792 {
793         int version;
794         int rc;
795         
796         /* assume the worst */
797         *new_version = LDAP_VERSION2;
798
799         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
800         if (rc) {
801                 return rc;
802         }
803
804         if (version == LDAP_VERSION3) {
805                 *new_version = LDAP_VERSION3;
806                 return LDAP_SUCCESS;
807         }
808
809         /* try upgrade */
810         version = LDAP_VERSION3;
811         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
812         if (rc) {
813                 return rc;
814         }
815                 
816         *new_version = LDAP_VERSION3;
817         return LDAP_SUCCESS;
818 }
819
820 /*******************************************************************
821  open a connection to the ldap server (just until the bind)
822  ******************************************************************/
823
824 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
825 {
826         int rc, version;
827
828         rc = smb_ldap_setup_conn(ldap_struct, uri);
829         if (rc) {
830                 return rc;
831         }
832
833         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
834         if (rc) {
835                 return rc;
836         }
837
838         rc = smb_ldap_start_tls(*ldap_struct, version);
839         if (rc) {
840                 return rc;
841         }
842
843         return LDAP_SUCCESS;
844 }
845
846 /*******************************************************************
847  open a connection to the ldap server.
848 ******************************************************************/
849 static int smbldap_open_connection (struct smbldap_state *ldap_state)
850
851 {
852         int rc = LDAP_SUCCESS;
853         int version;
854         LDAP **ldap_struct = &ldap_state->ldap_struct;
855
856         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
857         if (rc) {
858                 return rc;
859         }
860
861         /* Store the LDAP pointer in a lookup list */
862
863         smbldap_store_state(*ldap_struct, ldap_state);
864
865         /* Upgrade to LDAPv3 if possible */
866
867         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
868         if (rc) {
869                 return rc;
870         }
871
872         /* Start TLS if required */
873
874         rc = smb_ldap_start_tls(*ldap_struct, version);
875         if (rc) {
876                 return rc;
877         }
878         
879         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
880         return rc;
881 }
882
883 /*******************************************************************
884  a rebind function for authenticated referrals
885  This version takes a void* that we can shove useful stuff in :-)
886 ******************************************************************/
887 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
888 #else
889 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp, 
890                                    int *methodp, int freeit, void *arg)
891 {
892         struct smbldap_state *ldap_state = arg;
893         
894         /** @TODO Should we be doing something to check what servers we rebind to?
895             Could we get a referral to a machine that we don't want to give our
896             username and password to? */
897         
898         if (freeit) {
899                 SAFE_FREE(*whop);
900                 if (*credp) {
901                         memset(*credp, '\0', strlen(*credp));
902                 }
903                 SAFE_FREE(*credp);
904         } else {
905                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n", 
906                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
907
908                 if (ldap_state->anonymous) {
909                         *whop = NULL;
910                         *credp = NULL;
911                 } else {
912                         *whop = SMB_STRDUP(ldap_state->bind_dn);
913                         if (!*whop) {
914                                 return LDAP_NO_MEMORY;
915                         }
916                         *credp = SMB_STRDUP(ldap_state->bind_secret);
917                         if (!*credp) {
918                                 SAFE_FREE(*whop);
919                                 return LDAP_NO_MEMORY;
920                         }
921                 }
922                 *methodp = LDAP_AUTH_SIMPLE;
923         }
924
925         GetTimeOfDay(&ldap_state->last_rebind);
926                 
927         return 0;
928 }
929 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
930
931 /*******************************************************************
932  a rebind function for authenticated referrals
933  This version takes a void* that we can shove useful stuff in :-)
934  and actually does the connection.
935 ******************************************************************/
936 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
937 static int rebindproc_connect_with_state (LDAP *ldap_struct, 
938                                           LDAP_CONST char *url, 
939                                           ber_tag_t request,
940                                           ber_int_t msgid, void *arg)
941 {
942         struct smbldap_state *ldap_state =
943                 (struct smbldap_state *)arg;
944         int rc;
945         int version;
946
947         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n", 
948                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
949
950         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
951          * itself) before rebinding to another LDAP server to avoid to expose
952          * our credentials. At least *try* to secure the connection - Guenther */
953
954         smb_ldap_upgrade_conn(ldap_struct, &version);
955         smb_ldap_start_tls(ldap_struct, version);
956
957         /** @TODO Should we be doing something to check what servers we rebind to?
958             Could we get a referral to a machine that we don't want to give our
959             username and password to? */
960
961         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
962
963         /* only set the last rebind timestamp when we did rebind after a
964          * non-read LDAP operation. That way we avoid the replication sleep
965          * after a simple redirected search operation - Guenther */
966
967         switch (request) {
968
969                 case LDAP_REQ_MODIFY:
970                 case LDAP_REQ_ADD:
971                 case LDAP_REQ_DELETE:
972                 case LDAP_REQ_MODDN:
973                 case LDAP_REQ_EXTENDED:
974                         DEBUG(10,("rebindproc_connect_with_state: "
975                                 "setting last_rebind timestamp "
976                                 "(req: 0x%02x)\n", (unsigned int)request));
977                         GetTimeOfDay(&ldap_state->last_rebind);
978                         break;
979                 default:
980                         ZERO_STRUCT(ldap_state->last_rebind);
981                         break;
982         }
983
984         return rc;
985 }
986 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
987
988 /*******************************************************************
989  Add a rebind function for authenticated referrals
990 ******************************************************************/
991 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
992 #else
993 # if LDAP_SET_REBIND_PROC_ARGS == 2
994 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
995                        int *method, int freeit )
996 {
997         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
998
999         return rebindproc_with_state(ldap_struct, whop, credp,
1000                                      method, freeit, ldap_state);
1001         
1002 }
1003 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1004 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1005
1006 /*******************************************************************
1007  a rebind function for authenticated referrals
1008  this also does the connection, but no void*.
1009 ******************************************************************/
1010 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1011 # if LDAP_SET_REBIND_PROC_ARGS == 2
1012 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1013                                ber_int_t msgid)
1014 {
1015         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1016
1017         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid, 
1018                                              ldap_state);
1019 }
1020 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1021 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1022
1023 /*******************************************************************
1024  connect to the ldap server under system privilege.
1025 ******************************************************************/
1026 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1027 {
1028         int rc;
1029         int version;
1030
1031         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1032
1033                 /* get the default dn and password only if they are not set already */
1034                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
1035                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1036                         return LDAP_INVALID_CREDENTIALS;
1037                 }
1038         }
1039
1040         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite 
1041            (OpenLDAP) doesnt' seem to support it */
1042            
1043         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1044                   ldap_state->uri, ldap_state->bind_dn));
1045
1046 #ifdef HAVE_LDAP_SET_REBIND_PROC
1047 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1048 # if LDAP_SET_REBIND_PROC_ARGS == 2     
1049         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect); 
1050 # endif
1051 # if LDAP_SET_REBIND_PROC_ARGS == 3     
1052         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);  
1053 # endif
1054 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1055 # if LDAP_SET_REBIND_PROC_ARGS == 2     
1056         ldap_set_rebind_proc(ldap_struct, &rebindproc); 
1057 # endif
1058 # if LDAP_SET_REBIND_PROC_ARGS == 3     
1059         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);  
1060 # endif
1061 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1062 #endif
1063
1064         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1065
1066         if (rc != LDAP_SUCCESS) {
1067                 char *ld_error = NULL;
1068                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1069                                 &ld_error);
1070                 DEBUG(ldap_state->num_failures ? 2 : 0,
1071                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1072                                ldap_state->uri,
1073                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1074                                ldap_err2string(rc),
1075                                ld_error ? ld_error : "(unknown)"));
1076                 SAFE_FREE(ld_error);
1077                 ldap_state->num_failures++;
1078                 return rc;
1079         }
1080
1081         ldap_state->num_failures = 0;
1082         ldap_state->paged_results = False;
1083
1084         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1085
1086         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1087                 ldap_state->paged_results = True;
1088         }
1089
1090         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1091         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n", 
1092                 ldap_state->paged_results ? "does" : "does not"));
1093         return rc;
1094 }
1095
1096 static void smbldap_idle_fn(struct event_context *event_ctx,
1097                             struct timed_event *te,
1098                             struct timeval now,
1099                             void *private_data);
1100
1101 /**********************************************************************
1102  Connect to LDAP server (called before every ldap operation)
1103 *********************************************************************/
1104 static int smbldap_open(struct smbldap_state *ldap_state)
1105 {
1106         int rc, opt_rc;
1107         bool reopen = False;
1108         SMB_ASSERT(ldap_state);
1109
1110         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1111
1112 #ifdef HAVE_UNIXSOCKET
1113                 struct sockaddr_un addr;
1114 #else
1115                 struct sockaddr addr;
1116 #endif
1117                 socklen_t len = sizeof(addr);
1118                 int sd;
1119
1120                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1121                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1122                         reopen = True;
1123
1124 #ifdef HAVE_UNIXSOCKET
1125                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1126                         reopen = True;
1127 #endif
1128                 if (reopen) {
1129                         /* the other end has died. reopen. */
1130                         ldap_unbind(ldap_state->ldap_struct);
1131                         ldap_state->ldap_struct = NULL;
1132                         ldap_state->last_ping = (time_t)0;
1133                 } else {
1134                         ldap_state->last_ping = time(NULL);
1135                 } 
1136         }
1137
1138         if (ldap_state->ldap_struct != NULL) {
1139                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1140                 return LDAP_SUCCESS;
1141         }
1142
1143         if ((rc = smbldap_open_connection(ldap_state))) {
1144                 return rc;
1145         }
1146
1147         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1148                 ldap_unbind(ldap_state->ldap_struct);
1149                 ldap_state->ldap_struct = NULL;
1150                 return rc;
1151         }
1152
1153
1154         ldap_state->last_ping = time(NULL);
1155         ldap_state->pid = sys_getpid();
1156
1157         TALLOC_FREE(ldap_state->idle_event);
1158
1159         if (ldap_state->event_context != NULL) {
1160                 ldap_state->idle_event = event_add_timed(
1161                         ldap_state->event_context, NULL,
1162                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1163                         smbldap_idle_fn, ldap_state);
1164         }
1165
1166         DEBUG(4,("The LDAP server is successfully connected\n"));
1167
1168         return LDAP_SUCCESS;
1169 }
1170
1171 /**********************************************************************
1172 Disconnect from LDAP server 
1173 *********************************************************************/
1174 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1175 {
1176         if (!ldap_state)
1177                 return NT_STATUS_INVALID_PARAMETER;
1178                 
1179         if (ldap_state->ldap_struct != NULL) {
1180                 ldap_unbind(ldap_state->ldap_struct);
1181                 ldap_state->ldap_struct = NULL;
1182         }
1183
1184         smbldap_delete_state(ldap_state);
1185         
1186         DEBUG(5,("The connection to the LDAP server was closed\n"));
1187         /* maybe free the results here --metze */
1188         
1189         return NT_STATUS_OK;
1190 }
1191
1192 static bool got_alarm;
1193
1194 static void (*old_handler)(int);
1195
1196 static void gotalarm_sig(int dummy)
1197 {
1198         got_alarm = True;
1199 }
1200
1201 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1202                             int *attempts, time_t endtime)
1203 {
1204         time_t now = time(NULL);
1205         int open_rc = LDAP_SERVER_DOWN;
1206
1207         if (*rc != LDAP_SERVER_DOWN)
1208                 goto no_next;
1209
1210         if (now >= endtime) {
1211                 smbldap_close(ldap_state);
1212                 *rc = LDAP_TIMEOUT;
1213                 goto no_next;
1214         }
1215
1216         if (*attempts == 0) {
1217                 got_alarm = False;
1218                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1219                 alarm(endtime - now);
1220
1221                 if (ldap_state->pid != sys_getpid())
1222                         smbldap_close(ldap_state);
1223         }
1224
1225         while (1) {
1226
1227                 if (*attempts != 0)
1228                         smb_msleep(1000);
1229
1230                 *attempts += 1;
1231
1232                 open_rc = smbldap_open(ldap_state);
1233
1234                 if (open_rc == LDAP_SUCCESS) {
1235                         ldap_state->last_use = now;
1236                         return True;
1237                 }
1238
1239                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1240                         /* The fact that we are non-root or any other
1241                          * access-denied condition will not change in the next
1242                          * round of trying */
1243                         *rc = open_rc;
1244                         break;
1245                 }
1246
1247                 if (got_alarm) {
1248                         *rc = LDAP_TIMEOUT;
1249                         break;
1250                 }
1251
1252                 if (open_rc != LDAP_SUCCESS) {
1253                         DEBUG(1, ("Connection to LDAP server failed for the "
1254                                   "%d try!\n", *attempts));
1255                 }
1256         }
1257
1258  no_next:
1259         CatchSignal(SIGALRM, old_handler);
1260         alarm(0);
1261         ldap_state->last_use = now;
1262         return False;
1263 }
1264
1265 /*********************************************************************
1266  ********************************************************************/
1267
1268 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1269                               const char *base, int scope, const char *filter, 
1270                               const char *attrs[], int attrsonly,
1271                               LDAPControl **sctrls, LDAPControl **cctrls, 
1272                               int sizelimit, LDAPMessage **res)
1273 {
1274         int             rc = LDAP_SERVER_DOWN;
1275         int             attempts = 0;
1276         char           *utf8_filter;
1277         time_t          endtime = time(NULL)+lp_ldap_timeout();
1278         struct          timeval timeout;
1279         size_t          converted_size;
1280
1281         SMB_ASSERT(ldap_state);
1282         
1283         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1284                  "scope => [%d]\n", base, filter, scope));
1285
1286         if (ldap_state->last_rebind.tv_sec > 0) {
1287                 struct timeval  tval;
1288                 int64_t tdiff = 0;
1289                 int             sleep_time = 0;
1290
1291                 ZERO_STRUCT(tval);
1292                 GetTimeOfDay(&tval);
1293
1294                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1295                 tdiff /= 1000; /* Convert to milliseconds. */
1296
1297                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1298                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1299
1300                 if (sleep_time > 0) {
1301                         /* we wait for the LDAP replication */
1302                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1303                                  "for LDAP replication.\n",sleep_time));
1304                         smb_msleep(sleep_time);
1305                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1306                 }
1307                 ZERO_STRUCT(ldap_state->last_rebind);
1308         }
1309
1310         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1311                 return LDAP_NO_MEMORY;
1312         }
1313
1314         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1315         timeout.tv_sec = lp_ldap_timeout();
1316         timeout.tv_usec = 0;
1317
1318         /* Setup alarm timeout.... Do we need both of these ? JRA.
1319          * Yes, I think we do need both of these. The server timeout only
1320          * covers the case where the server's operation takes too long. It
1321          * does not cover the case where the request hangs on its way to the
1322          * server. The server side timeout is not strictly necessary, it's
1323          * just a bit more kind to the server. VL. */
1324
1325         got_alarm = 0;
1326         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1327         alarm(lp_ldap_timeout());
1328         /* End setup timeout. */
1329
1330         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1331                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope, 
1332                                        utf8_filter,
1333                                        CONST_DISCARD(char **, attrs),
1334                                        attrsonly, sctrls, cctrls, &timeout,
1335                                        sizelimit, res);
1336                 if (rc != LDAP_SUCCESS) {
1337                         char *ld_error = NULL;
1338                         int ld_errno;
1339
1340                         ldap_get_option(ldap_state->ldap_struct,
1341                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1342
1343                         ldap_get_option(ldap_state->ldap_struct,
1344                                         LDAP_OPT_ERROR_STRING, &ld_error);
1345                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1346                                    "(%s)\n", base, ld_errno,
1347                                    ldap_err2string(rc),
1348                                    ld_error ? ld_error : "unknown"));
1349                         SAFE_FREE(ld_error);
1350
1351                         if (ld_errno == LDAP_SERVER_DOWN) {
1352                                 ldap_unbind(ldap_state->ldap_struct);
1353                                 ldap_state->ldap_struct = NULL;
1354                         }
1355                 }
1356         }
1357
1358         TALLOC_FREE(utf8_filter);
1359
1360         /* Teardown timeout. */
1361         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1362         alarm(0);
1363
1364         if (got_alarm != 0)
1365                 return LDAP_TIMELIMIT_EXCEEDED;
1366
1367         return rc;
1368 }
1369
1370 int smbldap_search(struct smbldap_state *ldap_state, 
1371                    const char *base, int scope, const char *filter, 
1372                    const char *attrs[], int attrsonly, 
1373                    LDAPMessage **res)
1374 {
1375         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1376                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1377 }
1378
1379 int smbldap_search_paged(struct smbldap_state *ldap_state, 
1380                          const char *base, int scope, const char *filter, 
1381                          const char **attrs, int attrsonly, int pagesize,
1382                          LDAPMessage **res, void **cookie)
1383 {
1384         LDAPControl     pr;
1385         LDAPControl     **rcontrols;
1386         LDAPControl     *controls[2] = { NULL, NULL};
1387         BerElement      *cookie_be = NULL;
1388         struct berval   *cookie_bv = NULL;
1389         int             tmp = 0, i, rc;
1390         bool            critical = True;
1391
1392         *res = NULL;
1393
1394         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1395                  "scope => [%d], pagesize => [%d]\n",
1396                  base, filter, scope, pagesize));
1397
1398         cookie_be = ber_alloc_t(LBER_USE_DER);
1399         if (cookie_be == NULL) {
1400                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1401                          "NULL\n"));
1402                 return LDAP_NO_MEMORY;
1403         }
1404
1405         /* construct cookie */
1406         if (*cookie != NULL) {
1407                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1408                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1409                 *cookie = NULL;
1410         } else {
1411                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1412         }
1413         ber_flatten(cookie_be, &cookie_bv);
1414
1415         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1416         pr.ldctl_iscritical = (char) critical;
1417         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1418         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1419
1420         controls[0] = &pr;
1421         controls[1] = NULL;
1422
1423         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs, 
1424                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1425
1426         ber_free(cookie_be, 1);
1427         ber_bvfree(cookie_bv);
1428
1429         if (rc != 0) {
1430                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1431                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1432                 goto done;
1433         }
1434
1435         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1436
1437         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL, 
1438                                NULL, NULL, &rcontrols,  0);
1439         if (rc != 0) {
1440                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1441                          "with [%s]\n", ldap_err2string(rc)));
1442                 goto done;
1443         }
1444
1445         if (rcontrols == NULL)
1446                 goto done;
1447
1448         for (i=0; rcontrols[i]; i++) {
1449
1450                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1451                         continue;
1452
1453                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1454                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1455                 /* the berval is the cookie, but must be freed when it is all
1456                    done */
1457                 if (cookie_bv->bv_len)
1458                         *cookie=ber_bvdup(cookie_bv);
1459                 else
1460                         *cookie=NULL;
1461                 ber_bvfree(cookie_bv);
1462                 ber_free(cookie_be, 1);
1463                 break;
1464         }
1465         ldap_controls_free(rcontrols);
1466 done:   
1467         return rc;
1468 }
1469
1470 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1471 {
1472         int             rc = LDAP_SERVER_DOWN;
1473         int             attempts = 0;
1474         char           *utf8_dn;
1475         time_t          endtime = time(NULL)+lp_ldap_timeout();
1476         size_t          converted_size;
1477
1478         SMB_ASSERT(ldap_state);
1479
1480         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1481
1482         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1483                 return LDAP_NO_MEMORY;
1484         }
1485
1486         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1487                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1488                 if (rc != LDAP_SUCCESS) {
1489                         char *ld_error = NULL;
1490                         int ld_errno;
1491
1492                         ldap_get_option(ldap_state->ldap_struct,
1493                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1494
1495                         ldap_get_option(ldap_state->ldap_struct,
1496                                         LDAP_OPT_ERROR_STRING, &ld_error);
1497                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1498                                    "(%s)\n", dn, ld_errno,
1499                                    ldap_err2string(rc),
1500                                    ld_error ? ld_error : "unknown"));
1501                         SAFE_FREE(ld_error);
1502
1503                         if (ld_errno == LDAP_SERVER_DOWN) {
1504                                 ldap_unbind(ldap_state->ldap_struct);
1505                                 ldap_state->ldap_struct = NULL;
1506                         }
1507                 }
1508         }
1509                 
1510         TALLOC_FREE(utf8_dn);
1511         return rc;
1512 }
1513
1514 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1515 {
1516         int             rc = LDAP_SERVER_DOWN;
1517         int             attempts = 0;
1518         char           *utf8_dn;
1519         time_t          endtime = time(NULL)+lp_ldap_timeout();
1520         size_t          converted_size;
1521         
1522         SMB_ASSERT(ldap_state);
1523
1524         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1525
1526         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1527                 return LDAP_NO_MEMORY;
1528         }
1529
1530         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1531                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1532                 if (rc != LDAP_SUCCESS) {
1533                         char *ld_error = NULL;
1534                         int ld_errno;
1535
1536                         ldap_get_option(ldap_state->ldap_struct,
1537                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1538
1539                         ldap_get_option(ldap_state->ldap_struct,
1540                                         LDAP_OPT_ERROR_STRING, &ld_error);
1541                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1542                                    "(%s)\n", dn, ld_errno,
1543                                    ldap_err2string(rc),
1544                                    ld_error ? ld_error : "unknown"));
1545                         SAFE_FREE(ld_error);
1546
1547                         if (ld_errno == LDAP_SERVER_DOWN) {
1548                                 ldap_unbind(ldap_state->ldap_struct);
1549                                 ldap_state->ldap_struct = NULL;
1550                         }
1551                 }
1552         }
1553         
1554         TALLOC_FREE(utf8_dn);
1555         return rc;
1556 }
1557
1558 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1559 {
1560         int             rc = LDAP_SERVER_DOWN;
1561         int             attempts = 0;
1562         char           *utf8_dn;
1563         time_t          endtime = time(NULL)+lp_ldap_timeout();
1564         size_t          converted_size;
1565         
1566         SMB_ASSERT(ldap_state);
1567
1568         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1569
1570         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1571                 return LDAP_NO_MEMORY;
1572         }
1573
1574         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1575                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1576                 if (rc != LDAP_SUCCESS) {
1577                         char *ld_error = NULL;
1578                         int ld_errno;
1579
1580                         ldap_get_option(ldap_state->ldap_struct,
1581                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1582
1583                         ldap_get_option(ldap_state->ldap_struct,
1584                                         LDAP_OPT_ERROR_STRING, &ld_error);
1585                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1586                                    "(%s)\n", dn, ld_errno,
1587                                    ldap_err2string(rc),
1588                                    ld_error ? ld_error : "unknown"));
1589                         SAFE_FREE(ld_error);
1590
1591                         if (ld_errno == LDAP_SERVER_DOWN) {
1592                                 ldap_unbind(ldap_state->ldap_struct);
1593                                 ldap_state->ldap_struct = NULL;
1594                         }
1595                 }
1596         }
1597         
1598         TALLOC_FREE(utf8_dn);
1599         return rc;
1600 }
1601
1602 int smbldap_extended_operation(struct smbldap_state *ldap_state, 
1603                                LDAP_CONST char *reqoid, struct berval *reqdata, 
1604                                LDAPControl **serverctrls, LDAPControl **clientctrls, 
1605                                char **retoidp, struct berval **retdatap)
1606 {
1607         int             rc = LDAP_SERVER_DOWN;
1608         int             attempts = 0;
1609         time_t          endtime = time(NULL)+lp_ldap_timeout();
1610         
1611         if (!ldap_state)
1612                 return (-1);
1613
1614         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1615                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1616                                                reqdata, serverctrls,
1617                                                clientctrls, retoidp, retdatap);
1618                 if (rc != LDAP_SUCCESS) {
1619                         char *ld_error = NULL;
1620                         int ld_errno;
1621
1622                         ldap_get_option(ldap_state->ldap_struct,
1623                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1624
1625                         ldap_get_option(ldap_state->ldap_struct,
1626                                         LDAP_OPT_ERROR_STRING, &ld_error);
1627                         DEBUG(10, ("Extended operation failed with error: "
1628                                    "%d (%s) (%s)\n", ld_errno,
1629                                    ldap_err2string(rc),
1630                                    ld_error ? ld_error : "unknown"));
1631                         SAFE_FREE(ld_error);
1632
1633                         if (ld_errno == LDAP_SERVER_DOWN) {
1634                                 ldap_unbind(ldap_state->ldap_struct);
1635                                 ldap_state->ldap_struct = NULL;
1636                         }
1637                 }
1638         }
1639                 
1640         return rc;
1641 }
1642
1643 /*******************************************************************
1644  run the search by name.
1645 ******************************************************************/
1646 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1647                            const char *filter, const char **search_attr,
1648                            LDAPMessage ** result)
1649 {
1650         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1651                               filter, search_attr, 0, result);
1652 }
1653
1654 static void smbldap_idle_fn(struct event_context *event_ctx,
1655                             struct timed_event *te,
1656                             struct timeval now,
1657                             void *private_data)
1658 {
1659         struct smbldap_state *state = (struct smbldap_state *)private_data;
1660
1661         TALLOC_FREE(state->idle_event);
1662
1663         if (state->ldap_struct == NULL) {
1664                 DEBUG(10,("ldap connection not connected...\n"));
1665                 return;
1666         }
1667                 
1668         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1669                 DEBUG(10,("ldap connection not idle...\n"));
1670
1671                 state->idle_event = event_add_timed(
1672                         event_ctx, NULL,
1673                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1674                         smbldap_idle_fn,
1675                         private_data);
1676                 return;
1677         }
1678                 
1679         DEBUG(7,("ldap connection idle...closing connection\n"));
1680         smbldap_close(state);
1681 }
1682
1683 /**********************************************************************
1684  Housekeeping
1685  *********************************************************************/
1686
1687 void smbldap_free_struct(struct smbldap_state **ldap_state) 
1688 {
1689         smbldap_close(*ldap_state);
1690         
1691         if ((*ldap_state)->bind_secret) {
1692                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1693         }
1694
1695         SAFE_FREE((*ldap_state)->bind_dn);
1696         SAFE_FREE((*ldap_state)->bind_secret);
1697
1698         TALLOC_FREE((*ldap_state)->idle_event);
1699
1700         *ldap_state = NULL;
1701
1702         /* No need to free any further, as it is talloc()ed */
1703 }
1704
1705
1706 /**********************************************************************
1707  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1708  *********************************************************************/
1709
1710 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1711                       const char *location,
1712                       struct smbldap_state **smbldap_state)
1713 {
1714         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1715         if (!*smbldap_state) {
1716                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1717                 return NT_STATUS_NO_MEMORY;
1718         }
1719
1720         if (location) {
1721                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1722         } else {
1723                 (*smbldap_state)->uri = "ldap://localhost";
1724         }
1725
1726         (*smbldap_state)->event_context = event_ctx;
1727
1728         return NT_STATUS_OK;
1729 }
1730
1731  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1732                          LDAPMessage *entry)
1733 {
1734         char *utf8_dn, *unix_dn;
1735         size_t converted_size;
1736
1737         utf8_dn = ldap_get_dn(ld, entry);
1738         if (!utf8_dn) {
1739                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1740                 return NULL;
1741         }
1742         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1743                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1744                            "[%s]\n", utf8_dn));
1745                 return NULL;
1746         }
1747         ldap_memfree(utf8_dn);
1748         return unix_dn;
1749 }
1750
1751 /*******************************************************************
1752  Check if root-dse has a certain Control or Extension
1753 ********************************************************************/
1754
1755 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value) 
1756 {
1757         LDAPMessage *msg = NULL;
1758         LDAPMessage *entry = NULL;
1759         char **values = NULL;
1760         int rc, num_result, num_values, i;
1761         bool result = False;
1762
1763         if (!attrs[0]) {
1764                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1765                 return False;
1766         }
1767
1768         if (!strequal(attrs[0], "supportedExtension") && 
1769             !strequal(attrs[0], "supportedControl") && 
1770             !strequal(attrs[0], "namingContexts")) {
1771                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1772                 return False;
1773         }
1774
1775         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE, 
1776                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1777
1778         if (rc != LDAP_SUCCESS) {
1779                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1780                 return False;
1781         }
1782
1783         num_result = ldap_count_entries(ld, msg);
1784
1785         if (num_result != 1) {
1786                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1787                 goto done;
1788         }
1789
1790         entry = ldap_first_entry(ld, msg);
1791
1792         if (entry == NULL) {
1793                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1794                 goto done;
1795         }
1796
1797         values = ldap_get_values(ld, entry, attrs[0]);
1798
1799         if (values == NULL) {
1800                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1801                 goto done;
1802         }
1803
1804         num_values = ldap_count_values(values);
1805
1806         if (num_values == 0) {
1807                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1808                 goto done;
1809         }
1810
1811         for (i=0; i<num_values; i++) {
1812                 if (strcmp(values[i], value) == 0)
1813                         result = True;
1814         }
1815
1816
1817  done:
1818         if (values != NULL)
1819                 ldap_value_free(values);
1820         if (msg != NULL)
1821                 ldap_msgfree(msg);
1822
1823         return result;
1824
1825 }
1826
1827 /*******************************************************************
1828  Check if LDAP-Server supports a certain Control (OID in string format)
1829 ********************************************************************/
1830
1831 bool smbldap_has_control(LDAP *ld, const char *control)
1832 {
1833         const char *attrs[] = { "supportedControl", NULL };
1834         return smbldap_check_root_dse(ld, attrs, control);
1835 }
1836
1837 /*******************************************************************
1838  Check if LDAP-Server supports a certain Extension (OID in string format)
1839 ********************************************************************/
1840
1841 bool smbldap_has_extension(LDAP *ld, const char *extension)
1842 {
1843         const char *attrs[] = { "supportedExtension", NULL };
1844         return smbldap_check_root_dse(ld, attrs, extension);
1845 }
1846
1847 /*******************************************************************
1848  Check if LDAP-Server holds a given namingContext
1849 ********************************************************************/
1850
1851 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1852 {
1853         const char *attrs[] = { "namingContexts", NULL };
1854         return smbldap_check_root_dse(ld, attrs, naming_context);
1855 }
1856
1857 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1858 {
1859         ldap_state->anonymous = anon;
1860
1861         /* free any previously set credential */
1862
1863         SAFE_FREE(ldap_state->bind_dn);
1864         if (ldap_state->bind_secret) {
1865                 /* make sure secrets are zeroed out of memory */
1866                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1867                 SAFE_FREE(ldap_state->bind_secret);
1868         }
1869
1870         if ( ! anon) {
1871                 ldap_state->bind_dn = SMB_STRDUP(dn);
1872                 ldap_state->bind_secret = SMB_STRDUP(secret);
1873         }
1874
1875         return True;
1876 }