Add smbldap_talloc_single_blob()
[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_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
393                                  LDAPMessage *msg, const char *attrib,
394                                  DATA_BLOB *blob)
395 {
396         struct berval **values;
397
398         values = ldap_get_values_len(ld, msg, attrib);
399         if (!values) {
400                 return false;
401         }
402
403         if (ldap_count_values_len(values) != 1) {
404                 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
405                            ldap_count_values_len(values)));
406                 return false;
407         }
408
409         *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
410                                  values[0]->bv_len);
411         ldap_value_free_len(values);
412
413         return (blob->data != NULL);
414 }
415
416  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
417                        struct dom_sid *sid)
418 {
419         DATA_BLOB blob;
420         bool ret;
421
422         if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
423                                         &blob)) {
424                 return false;
425         }
426         ret = sid_parse((char *)blob.data, blob.length, sid);
427         TALLOC_FREE(blob.data);
428         return ret;
429 }
430
431  static int ldapmsg_destructor(LDAPMessage **result) {
432         ldap_msgfree(*result);
433         return 0;
434 }
435
436  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
437 {
438         LDAPMessage **handle;
439
440         if (result == NULL) {
441                 return;
442         }
443
444         handle = TALLOC_P(mem_ctx, LDAPMessage *);
445         SMB_ASSERT(handle != NULL);
446
447         *handle = result;
448         talloc_set_destructor(handle, ldapmsg_destructor);
449 }
450
451  static int ldapmod_destructor(LDAPMod ***mod) {
452         ldap_mods_free(*mod, True);
453         return 0;
454 }
455
456  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
457 {
458         LDAPMod ***handle;
459
460         if (mod == NULL) {
461                 return;
462         }
463
464         handle = TALLOC_P(mem_ctx, LDAPMod **);
465         SMB_ASSERT(handle != NULL);
466
467         *handle = mod;
468         talloc_set_destructor(handle, ldapmod_destructor);
469 }
470
471 /************************************************************************
472  Routine to manage the LDAPMod structure array
473  manage memory used by the array, by each struct, and values
474  ***********************************************************************/
475
476  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
477 {
478         LDAPMod **mods;
479         int i;
480         int j;
481
482         mods = *modlist;
483
484         /* sanity checks on the mod values */
485
486         if (attribute == NULL || *attribute == '\0') {
487                 return; 
488         }
489
490 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
491            left here so other do not re-add similar code   --jerry */
492         if (value == NULL || *value == '\0')
493                 return;
494 #endif
495
496         if (mods == NULL) {
497                 mods = SMB_MALLOC_P(LDAPMod *);
498                 if (mods == NULL) {
499                         smb_panic("smbldap_set_mod: out of memory!");
500                         /* notreached. */
501                 }
502                 mods[0] = NULL;
503         }
504
505         for (i = 0; mods[i] != NULL; ++i) {
506                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
507                         break;
508         }
509
510         if (mods[i] == NULL) {
511                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
512                 if (mods == NULL) {
513                         smb_panic("smbldap_set_mod: out of memory!");
514                         /* notreached. */
515                 }
516                 mods[i] = SMB_MALLOC_P(LDAPMod);
517                 if (mods[i] == NULL) {
518                         smb_panic("smbldap_set_mod: out of memory!");
519                         /* notreached. */
520                 }
521                 mods[i]->mod_op = modop;
522                 mods[i]->mod_values = NULL;
523                 mods[i]->mod_type = SMB_STRDUP(attribute);
524                 mods[i + 1] = NULL;
525         }
526
527         if (value != NULL) {
528                 char *utf8_value = NULL;
529                 size_t converted_size;
530
531                 j = 0;
532                 if (mods[i]->mod_values != NULL) {
533                         for (; mods[i]->mod_values[j] != NULL; j++);
534                 }
535                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
536                                                
537                 if (mods[i]->mod_values == NULL) {
538                         smb_panic("smbldap_set_mod: out of memory!");
539                         /* notreached. */
540                 }
541
542                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
543                         smb_panic("smbldap_set_mod: String conversion failure!");
544                         /* notreached. */
545                 }
546                 
547                 
548                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
549                 TALLOC_FREE(utf8_value);
550                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
551
552                 mods[i]->mod_values[j + 1] = NULL;
553         }
554         *modlist = mods;
555 }
556
557 /**********************************************************************
558   Set attribute to newval in LDAP, regardless of what value the
559   attribute had in LDAP before.
560 *********************************************************************/
561
562  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
563                       LDAPMod ***mods,
564                       const char *attribute, const char *newval)
565 {
566         char oldval[2048]; /* current largest allowed value is mungeddial */
567         bool existed;
568
569         if (attribute == NULL) {
570                 /* This can actually happen for ldapsam_compat where we for
571                  * example don't have a password history */
572                 return;
573         }
574
575         if (existing != NULL) {
576                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
577         } else {
578                 existed = False;
579                 *oldval = '\0';
580         }
581
582         /* all of our string attributes are case insensitive */
583         
584         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
585                 
586                 /* Believe it or not, but LDAP will deny a delete and
587                    an add at the same time if the values are the
588                    same... */
589                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
590                 return;
591         }
592
593         if (existed) {
594                 /* There has been no value before, so don't delete it.
595                  * Here's a possible race: We might end up with
596                  * duplicate attributes */
597                 /* By deleting exactly the value we found in the entry this
598                  * should be race-free in the sense that the LDAP-Server will
599                  * deny the complete operation if somebody changed the
600                  * attribute behind our back. */
601                 /* This will also allow modifying single valued attributes 
602                  * in Novell NDS. In NDS you have to first remove attribute and then
603                  * you could add new value */
604                 
605                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
606                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
607         }
608
609         /* Regardless of the real operation (add or modify)
610            we add the new value here. We rely on deleting
611            the old value, should it exist. */
612
613         if ((newval != NULL) && (strlen(newval) > 0)) {
614                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
615                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
616         }
617 }
618
619 /**********************************************************************
620  Some varients of the LDAP rebind code do not pass in the third 'arg' 
621  pointer to a void*, so we try and work around it by assuming that the 
622  value of the 'LDAP *' pointer is the same as the one we had passed in
623  **********************************************************************/
624
625 struct smbldap_state_lookup {
626         LDAP *ld;
627         struct smbldap_state *smbldap_state;
628         struct smbldap_state_lookup *prev, *next;
629 };
630
631 static struct smbldap_state_lookup *smbldap_state_lookup_list;
632
633 static struct smbldap_state *smbldap_find_state(LDAP *ld) 
634 {
635         struct smbldap_state_lookup *t;
636
637         for (t = smbldap_state_lookup_list; t; t = t->next) {
638                 if (t->ld == ld) {
639                         return t->smbldap_state;
640                 }
641         }
642         return NULL;
643 }
644
645 static void smbldap_delete_state(struct smbldap_state *smbldap_state) 
646 {
647         struct smbldap_state_lookup *t;
648
649         for (t = smbldap_state_lookup_list; t; t = t->next) {
650                 if (t->smbldap_state == smbldap_state) {
651                         DLIST_REMOVE(smbldap_state_lookup_list, t);
652                         SAFE_FREE(t);
653                         return;
654                 }
655         }
656 }
657
658 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state) 
659 {
660         struct smbldap_state *tmp_ldap_state;
661         struct smbldap_state_lookup *t;
662         
663         if ((tmp_ldap_state = smbldap_find_state(ld))) {
664                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
665                 return;
666         }
667
668         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
669         ZERO_STRUCTP(t);
670         
671         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
672         t->ld = ld;
673         t->smbldap_state = smbldap_state;
674 }
675
676 /********************************************************************
677  start TLS on an existing LDAP connection
678 *******************************************************************/
679
680 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
681
682 #ifdef LDAP_OPT_X_TLS
683         int rc;
684 #endif
685         
686         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
687                 return LDAP_SUCCESS;
688         }
689         
690 #ifdef LDAP_OPT_X_TLS
691         if (version != LDAP_VERSION3) {
692                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
693                 return LDAP_OPERATIONS_ERROR;
694         }
695
696         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
697                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
698                          ldap_err2string(rc)));
699                 return rc;
700         }
701
702         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
703         return LDAP_SUCCESS;
704 #else
705         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
706         return LDAP_OPERATIONS_ERROR;
707 #endif
708 }
709
710 /********************************************************************
711  setup a connection to the LDAP server based on a uri
712 *******************************************************************/
713
714 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
715 {
716         int rc;
717
718         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
719         
720 #ifdef HAVE_LDAP_INITIALIZE
721         
722         rc = ldap_initialize(ldap_struct, uri);
723         if (rc) {
724                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
725         }
726
727         return rc;
728 #else 
729
730         /* Parse the string manually */
731
732         {
733                 int port = 0;
734                 fstring protocol;
735                 fstring host;
736                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
737
738
739                 /* skip leading "URL:" (if any) */
740                 if ( strnequal( uri, "URL:", 4 ) ) {
741                         uri += 4;
742                 }
743                 
744                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
745                 
746                 if (port == 0) {
747                         if (strequal(protocol, "ldap")) {
748                                 port = LDAP_PORT;
749                         } else if (strequal(protocol, "ldaps")) {
750                                 port = LDAPS_PORT;
751                         } else {
752                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
753                         }
754                 }
755                 
756                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
757                         DEBUG(0, ("ldap_init failed !\n"));
758                         return LDAP_OPERATIONS_ERROR;
759                 }
760                 
761                 if (strequal(protocol, "ldaps")) {
762 #ifdef LDAP_OPT_X_TLS
763                         int tls = LDAP_OPT_X_TLS_HARD;
764                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
765                         {
766                                 DEBUG(0, ("Failed to setup a TLS session\n"));
767                         }
768                         
769                         DEBUG(3,("LDAPS option set...!\n"));
770 #else
771                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
772                         return LDAP_OPERATIONS_ERROR;
773 #endif /* LDAP_OPT_X_TLS */
774                 }
775         }
776 #endif /* HAVE_LDAP_INITIALIZE */
777
778
779         /* now set connection timeout */
780 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
781         {
782                 int ct = lp_ldap_connection_timeout()*1000;
783                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
784                 if (rc != LDAP_SUCCESS) {
785                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
786                                 ct, ldap_err2string(rc)));
787                 }
788         }
789 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
790         {
791                 struct timeval ct;
792                 ct.tv_usec = 0;
793                 ct.tv_sec = lp_ldap_connection_timeout();
794                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
795                 if (rc != LDAP_SUCCESS) {
796                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
797                                 (int)ct.tv_sec, ldap_err2string(rc)));
798                 }
799         }
800 #endif
801
802         return LDAP_SUCCESS;
803 }
804
805 /********************************************************************
806  try to upgrade to Version 3 LDAP if not already, in either case return current
807  version 
808  *******************************************************************/
809
810 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version) 
811 {
812         int version;
813         int rc;
814         
815         /* assume the worst */
816         *new_version = LDAP_VERSION2;
817
818         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
819         if (rc) {
820                 return rc;
821         }
822
823         if (version == LDAP_VERSION3) {
824                 *new_version = LDAP_VERSION3;
825                 return LDAP_SUCCESS;
826         }
827
828         /* try upgrade */
829         version = LDAP_VERSION3;
830         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
831         if (rc) {
832                 return rc;
833         }
834                 
835         *new_version = LDAP_VERSION3;
836         return LDAP_SUCCESS;
837 }
838
839 /*******************************************************************
840  open a connection to the ldap server (just until the bind)
841  ******************************************************************/
842
843 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
844 {
845         int rc, version;
846
847         rc = smb_ldap_setup_conn(ldap_struct, uri);
848         if (rc) {
849                 return rc;
850         }
851
852         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
853         if (rc) {
854                 return rc;
855         }
856
857         rc = smb_ldap_start_tls(*ldap_struct, version);
858         if (rc) {
859                 return rc;
860         }
861
862         return LDAP_SUCCESS;
863 }
864
865 /*******************************************************************
866  open a connection to the ldap server.
867 ******************************************************************/
868 static int smbldap_open_connection (struct smbldap_state *ldap_state)
869
870 {
871         int rc = LDAP_SUCCESS;
872         int version;
873         LDAP **ldap_struct = &ldap_state->ldap_struct;
874
875         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
876         if (rc) {
877                 return rc;
878         }
879
880         /* Store the LDAP pointer in a lookup list */
881
882         smbldap_store_state(*ldap_struct, ldap_state);
883
884         /* Upgrade to LDAPv3 if possible */
885
886         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
887         if (rc) {
888                 return rc;
889         }
890
891         /* Start TLS if required */
892
893         rc = smb_ldap_start_tls(*ldap_struct, version);
894         if (rc) {
895                 return rc;
896         }
897         
898         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
899         return rc;
900 }
901
902 /*******************************************************************
903  a rebind function for authenticated referrals
904  This version takes a void* that we can shove useful stuff in :-)
905 ******************************************************************/
906 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
907 #else
908 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp, 
909                                    int *methodp, int freeit, void *arg)
910 {
911         struct smbldap_state *ldap_state = arg;
912         
913         /** @TODO Should we be doing something to check what servers we rebind to?
914             Could we get a referral to a machine that we don't want to give our
915             username and password to? */
916         
917         if (freeit) {
918                 SAFE_FREE(*whop);
919                 if (*credp) {
920                         memset(*credp, '\0', strlen(*credp));
921                 }
922                 SAFE_FREE(*credp);
923         } else {
924                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n", 
925                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
926
927                 if (ldap_state->anonymous) {
928                         *whop = NULL;
929                         *credp = NULL;
930                 } else {
931                         *whop = SMB_STRDUP(ldap_state->bind_dn);
932                         if (!*whop) {
933                                 return LDAP_NO_MEMORY;
934                         }
935                         *credp = SMB_STRDUP(ldap_state->bind_secret);
936                         if (!*credp) {
937                                 SAFE_FREE(*whop);
938                                 return LDAP_NO_MEMORY;
939                         }
940                 }
941                 *methodp = LDAP_AUTH_SIMPLE;
942         }
943
944         GetTimeOfDay(&ldap_state->last_rebind);
945                 
946         return 0;
947 }
948 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
949
950 /*******************************************************************
951  a rebind function for authenticated referrals
952  This version takes a void* that we can shove useful stuff in :-)
953  and actually does the connection.
954 ******************************************************************/
955 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
956 static int rebindproc_connect_with_state (LDAP *ldap_struct, 
957                                           LDAP_CONST char *url, 
958                                           ber_tag_t request,
959                                           ber_int_t msgid, void *arg)
960 {
961         struct smbldap_state *ldap_state =
962                 (struct smbldap_state *)arg;
963         int rc;
964         int version;
965
966         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n", 
967                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
968
969         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
970          * itself) before rebinding to another LDAP server to avoid to expose
971          * our credentials. At least *try* to secure the connection - Guenther */
972
973         smb_ldap_upgrade_conn(ldap_struct, &version);
974         smb_ldap_start_tls(ldap_struct, version);
975
976         /** @TODO Should we be doing something to check what servers we rebind to?
977             Could we get a referral to a machine that we don't want to give our
978             username and password to? */
979
980         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
981
982         /* only set the last rebind timestamp when we did rebind after a
983          * non-read LDAP operation. That way we avoid the replication sleep
984          * after a simple redirected search operation - Guenther */
985
986         switch (request) {
987
988                 case LDAP_REQ_MODIFY:
989                 case LDAP_REQ_ADD:
990                 case LDAP_REQ_DELETE:
991                 case LDAP_REQ_MODDN:
992                 case LDAP_REQ_EXTENDED:
993                         DEBUG(10,("rebindproc_connect_with_state: "
994                                 "setting last_rebind timestamp "
995                                 "(req: 0x%02x)\n", (unsigned int)request));
996                         GetTimeOfDay(&ldap_state->last_rebind);
997                         break;
998                 default:
999                         ZERO_STRUCT(ldap_state->last_rebind);
1000                         break;
1001         }
1002
1003         return rc;
1004 }
1005 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1006
1007 /*******************************************************************
1008  Add a rebind function for authenticated referrals
1009 ******************************************************************/
1010 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1011 #else
1012 # if LDAP_SET_REBIND_PROC_ARGS == 2
1013 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
1014                        int *method, int freeit )
1015 {
1016         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
1017
1018         return rebindproc_with_state(ldap_struct, whop, credp,
1019                                      method, freeit, ldap_state);
1020         
1021 }
1022 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1023 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1024
1025 /*******************************************************************
1026  a rebind function for authenticated referrals
1027  this also does the connection, but no void*.
1028 ******************************************************************/
1029 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1030 # if LDAP_SET_REBIND_PROC_ARGS == 2
1031 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1032                                ber_int_t msgid)
1033 {
1034         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1035
1036         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid, 
1037                                              ldap_state);
1038 }
1039 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1040 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1041
1042 /*******************************************************************
1043  connect to the ldap server under system privilege.
1044 ******************************************************************/
1045 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1046 {
1047         int rc;
1048         int version;
1049
1050         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1051
1052                 /* get the default dn and password only if they are not set already */
1053                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
1054                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1055                         return LDAP_INVALID_CREDENTIALS;
1056                 }
1057         }
1058
1059         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite 
1060            (OpenLDAP) doesnt' seem to support it */
1061            
1062         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1063                   ldap_state->uri, ldap_state->bind_dn));
1064
1065 #ifdef HAVE_LDAP_SET_REBIND_PROC
1066 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1067 # if LDAP_SET_REBIND_PROC_ARGS == 2     
1068         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect); 
1069 # endif
1070 # if LDAP_SET_REBIND_PROC_ARGS == 3     
1071         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);  
1072 # endif
1073 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1074 # if LDAP_SET_REBIND_PROC_ARGS == 2     
1075         ldap_set_rebind_proc(ldap_struct, &rebindproc); 
1076 # endif
1077 # if LDAP_SET_REBIND_PROC_ARGS == 3     
1078         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);  
1079 # endif
1080 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1081 #endif
1082
1083         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1084
1085         if (rc != LDAP_SUCCESS) {
1086                 char *ld_error = NULL;
1087                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1088                                 &ld_error);
1089                 DEBUG(ldap_state->num_failures ? 2 : 0,
1090                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1091                                ldap_state->uri,
1092                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1093                                ldap_err2string(rc),
1094                                ld_error ? ld_error : "(unknown)"));
1095                 SAFE_FREE(ld_error);
1096                 ldap_state->num_failures++;
1097                 return rc;
1098         }
1099
1100         ldap_state->num_failures = 0;
1101         ldap_state->paged_results = False;
1102
1103         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1104
1105         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1106                 ldap_state->paged_results = True;
1107         }
1108
1109         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1110         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n", 
1111                 ldap_state->paged_results ? "does" : "does not"));
1112         return rc;
1113 }
1114
1115 static void smbldap_idle_fn(struct event_context *event_ctx,
1116                             struct timed_event *te,
1117                             struct timeval now,
1118                             void *private_data);
1119
1120 /**********************************************************************
1121  Connect to LDAP server (called before every ldap operation)
1122 *********************************************************************/
1123 static int smbldap_open(struct smbldap_state *ldap_state)
1124 {
1125         int rc, opt_rc;
1126         bool reopen = False;
1127         SMB_ASSERT(ldap_state);
1128
1129         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1130
1131 #ifdef HAVE_UNIXSOCKET
1132                 struct sockaddr_un addr;
1133 #else
1134                 struct sockaddr addr;
1135 #endif
1136                 socklen_t len = sizeof(addr);
1137                 int sd;
1138
1139                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1140                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1141                         reopen = True;
1142
1143 #ifdef HAVE_UNIXSOCKET
1144                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1145                         reopen = True;
1146 #endif
1147                 if (reopen) {
1148                         /* the other end has died. reopen. */
1149                         ldap_unbind(ldap_state->ldap_struct);
1150                         ldap_state->ldap_struct = NULL;
1151                         ldap_state->last_ping = (time_t)0;
1152                 } else {
1153                         ldap_state->last_ping = time(NULL);
1154                 } 
1155         }
1156
1157         if (ldap_state->ldap_struct != NULL) {
1158                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1159                 return LDAP_SUCCESS;
1160         }
1161
1162         if ((rc = smbldap_open_connection(ldap_state))) {
1163                 return rc;
1164         }
1165
1166         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1167                 ldap_unbind(ldap_state->ldap_struct);
1168                 ldap_state->ldap_struct = NULL;
1169                 return rc;
1170         }
1171
1172
1173         ldap_state->last_ping = time(NULL);
1174         ldap_state->pid = sys_getpid();
1175
1176         TALLOC_FREE(ldap_state->idle_event);
1177
1178         if (ldap_state->event_context != NULL) {
1179                 ldap_state->idle_event = event_add_timed(
1180                         ldap_state->event_context, NULL,
1181                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1182                         smbldap_idle_fn, ldap_state);
1183         }
1184
1185         DEBUG(4,("The LDAP server is successfully connected\n"));
1186
1187         return LDAP_SUCCESS;
1188 }
1189
1190 /**********************************************************************
1191 Disconnect from LDAP server 
1192 *********************************************************************/
1193 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1194 {
1195         if (!ldap_state)
1196                 return NT_STATUS_INVALID_PARAMETER;
1197                 
1198         if (ldap_state->ldap_struct != NULL) {
1199                 ldap_unbind(ldap_state->ldap_struct);
1200                 ldap_state->ldap_struct = NULL;
1201         }
1202
1203         smbldap_delete_state(ldap_state);
1204         
1205         DEBUG(5,("The connection to the LDAP server was closed\n"));
1206         /* maybe free the results here --metze */
1207         
1208         return NT_STATUS_OK;
1209 }
1210
1211 static bool got_alarm;
1212
1213 static void (*old_handler)(int);
1214
1215 static void gotalarm_sig(int dummy)
1216 {
1217         got_alarm = True;
1218 }
1219
1220 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1221                             int *attempts, time_t endtime)
1222 {
1223         time_t now = time(NULL);
1224         int open_rc = LDAP_SERVER_DOWN;
1225
1226         if (*rc != LDAP_SERVER_DOWN)
1227                 goto no_next;
1228
1229         if (now >= endtime) {
1230                 smbldap_close(ldap_state);
1231                 *rc = LDAP_TIMEOUT;
1232                 goto no_next;
1233         }
1234
1235         if (*attempts == 0) {
1236                 got_alarm = False;
1237                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1238                 alarm(endtime - now);
1239
1240                 if (ldap_state->pid != sys_getpid())
1241                         smbldap_close(ldap_state);
1242         }
1243
1244         while (1) {
1245
1246                 if (*attempts != 0)
1247                         smb_msleep(1000);
1248
1249                 *attempts += 1;
1250
1251                 open_rc = smbldap_open(ldap_state);
1252
1253                 if (open_rc == LDAP_SUCCESS) {
1254                         ldap_state->last_use = now;
1255                         return True;
1256                 }
1257
1258                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1259                         /* The fact that we are non-root or any other
1260                          * access-denied condition will not change in the next
1261                          * round of trying */
1262                         *rc = open_rc;
1263                         break;
1264                 }
1265
1266                 if (got_alarm) {
1267                         *rc = LDAP_TIMEOUT;
1268                         break;
1269                 }
1270
1271                 if (open_rc != LDAP_SUCCESS) {
1272                         DEBUG(1, ("Connection to LDAP server failed for the "
1273                                   "%d try!\n", *attempts));
1274                 }
1275         }
1276
1277  no_next:
1278         CatchSignal(SIGALRM, old_handler);
1279         alarm(0);
1280         ldap_state->last_use = now;
1281         return False;
1282 }
1283
1284 /*********************************************************************
1285  ********************************************************************/
1286
1287 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1288                               const char *base, int scope, const char *filter, 
1289                               const char *attrs[], int attrsonly,
1290                               LDAPControl **sctrls, LDAPControl **cctrls, 
1291                               int sizelimit, LDAPMessage **res)
1292 {
1293         int             rc = LDAP_SERVER_DOWN;
1294         int             attempts = 0;
1295         char           *utf8_filter;
1296         time_t          endtime = time(NULL)+lp_ldap_timeout();
1297         struct          timeval timeout;
1298         size_t          converted_size;
1299
1300         SMB_ASSERT(ldap_state);
1301         
1302         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1303                  "scope => [%d]\n", base, filter, scope));
1304
1305         if (ldap_state->last_rebind.tv_sec > 0) {
1306                 struct timeval  tval;
1307                 int64_t tdiff = 0;
1308                 int             sleep_time = 0;
1309
1310                 ZERO_STRUCT(tval);
1311                 GetTimeOfDay(&tval);
1312
1313                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1314                 tdiff /= 1000; /* Convert to milliseconds. */
1315
1316                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1317                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1318
1319                 if (sleep_time > 0) {
1320                         /* we wait for the LDAP replication */
1321                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1322                                  "for LDAP replication.\n",sleep_time));
1323                         smb_msleep(sleep_time);
1324                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1325                 }
1326                 ZERO_STRUCT(ldap_state->last_rebind);
1327         }
1328
1329         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1330                 return LDAP_NO_MEMORY;
1331         }
1332
1333         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1334         timeout.tv_sec = lp_ldap_timeout();
1335         timeout.tv_usec = 0;
1336
1337         /* Setup alarm timeout.... Do we need both of these ? JRA.
1338          * Yes, I think we do need both of these. The server timeout only
1339          * covers the case where the server's operation takes too long. It
1340          * does not cover the case where the request hangs on its way to the
1341          * server. The server side timeout is not strictly necessary, it's
1342          * just a bit more kind to the server. VL. */
1343
1344         got_alarm = 0;
1345         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1346         alarm(lp_ldap_timeout());
1347         /* End setup timeout. */
1348
1349         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1350                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope, 
1351                                        utf8_filter,
1352                                        CONST_DISCARD(char **, attrs),
1353                                        attrsonly, sctrls, cctrls, &timeout,
1354                                        sizelimit, res);
1355                 if (rc != LDAP_SUCCESS) {
1356                         char *ld_error = NULL;
1357                         int ld_errno;
1358
1359                         ldap_get_option(ldap_state->ldap_struct,
1360                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1361
1362                         ldap_get_option(ldap_state->ldap_struct,
1363                                         LDAP_OPT_ERROR_STRING, &ld_error);
1364                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1365                                    "(%s)\n", base, ld_errno,
1366                                    ldap_err2string(rc),
1367                                    ld_error ? ld_error : "unknown"));
1368                         SAFE_FREE(ld_error);
1369
1370                         if (ld_errno == LDAP_SERVER_DOWN) {
1371                                 ldap_unbind(ldap_state->ldap_struct);
1372                                 ldap_state->ldap_struct = NULL;
1373                         }
1374                 }
1375         }
1376
1377         TALLOC_FREE(utf8_filter);
1378
1379         /* Teardown timeout. */
1380         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1381         alarm(0);
1382
1383         if (got_alarm != 0)
1384                 return LDAP_TIMELIMIT_EXCEEDED;
1385
1386         return rc;
1387 }
1388
1389 int smbldap_search(struct smbldap_state *ldap_state, 
1390                    const char *base, int scope, const char *filter, 
1391                    const char *attrs[], int attrsonly, 
1392                    LDAPMessage **res)
1393 {
1394         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1395                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1396 }
1397
1398 int smbldap_search_paged(struct smbldap_state *ldap_state, 
1399                          const char *base, int scope, const char *filter, 
1400                          const char **attrs, int attrsonly, int pagesize,
1401                          LDAPMessage **res, void **cookie)
1402 {
1403         LDAPControl     pr;
1404         LDAPControl     **rcontrols;
1405         LDAPControl     *controls[2] = { NULL, NULL};
1406         BerElement      *cookie_be = NULL;
1407         struct berval   *cookie_bv = NULL;
1408         int             tmp = 0, i, rc;
1409         bool            critical = True;
1410
1411         *res = NULL;
1412
1413         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1414                  "scope => [%d], pagesize => [%d]\n",
1415                  base, filter, scope, pagesize));
1416
1417         cookie_be = ber_alloc_t(LBER_USE_DER);
1418         if (cookie_be == NULL) {
1419                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1420                          "NULL\n"));
1421                 return LDAP_NO_MEMORY;
1422         }
1423
1424         /* construct cookie */
1425         if (*cookie != NULL) {
1426                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1427                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1428                 *cookie = NULL;
1429         } else {
1430                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1431         }
1432         ber_flatten(cookie_be, &cookie_bv);
1433
1434         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1435         pr.ldctl_iscritical = (char) critical;
1436         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1437         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1438
1439         controls[0] = &pr;
1440         controls[1] = NULL;
1441
1442         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs, 
1443                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1444
1445         ber_free(cookie_be, 1);
1446         ber_bvfree(cookie_bv);
1447
1448         if (rc != 0) {
1449                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1450                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1451                 goto done;
1452         }
1453
1454         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1455
1456         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL, 
1457                                NULL, NULL, &rcontrols,  0);
1458         if (rc != 0) {
1459                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1460                          "with [%s]\n", ldap_err2string(rc)));
1461                 goto done;
1462         }
1463
1464         if (rcontrols == NULL)
1465                 goto done;
1466
1467         for (i=0; rcontrols[i]; i++) {
1468
1469                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1470                         continue;
1471
1472                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1473                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1474                 /* the berval is the cookie, but must be freed when it is all
1475                    done */
1476                 if (cookie_bv->bv_len)
1477                         *cookie=ber_bvdup(cookie_bv);
1478                 else
1479                         *cookie=NULL;
1480                 ber_bvfree(cookie_bv);
1481                 ber_free(cookie_be, 1);
1482                 break;
1483         }
1484         ldap_controls_free(rcontrols);
1485 done:   
1486         return rc;
1487 }
1488
1489 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1490 {
1491         int             rc = LDAP_SERVER_DOWN;
1492         int             attempts = 0;
1493         char           *utf8_dn;
1494         time_t          endtime = time(NULL)+lp_ldap_timeout();
1495         size_t          converted_size;
1496
1497         SMB_ASSERT(ldap_state);
1498
1499         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1500
1501         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1502                 return LDAP_NO_MEMORY;
1503         }
1504
1505         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1506                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1507                 if (rc != LDAP_SUCCESS) {
1508                         char *ld_error = NULL;
1509                         int ld_errno;
1510
1511                         ldap_get_option(ldap_state->ldap_struct,
1512                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1513
1514                         ldap_get_option(ldap_state->ldap_struct,
1515                                         LDAP_OPT_ERROR_STRING, &ld_error);
1516                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1517                                    "(%s)\n", dn, ld_errno,
1518                                    ldap_err2string(rc),
1519                                    ld_error ? ld_error : "unknown"));
1520                         SAFE_FREE(ld_error);
1521
1522                         if (ld_errno == LDAP_SERVER_DOWN) {
1523                                 ldap_unbind(ldap_state->ldap_struct);
1524                                 ldap_state->ldap_struct = NULL;
1525                         }
1526                 }
1527         }
1528                 
1529         TALLOC_FREE(utf8_dn);
1530         return rc;
1531 }
1532
1533 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1534 {
1535         int             rc = LDAP_SERVER_DOWN;
1536         int             attempts = 0;
1537         char           *utf8_dn;
1538         time_t          endtime = time(NULL)+lp_ldap_timeout();
1539         size_t          converted_size;
1540         
1541         SMB_ASSERT(ldap_state);
1542
1543         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1544
1545         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1546                 return LDAP_NO_MEMORY;
1547         }
1548
1549         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1550                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1551                 if (rc != LDAP_SUCCESS) {
1552                         char *ld_error = NULL;
1553                         int ld_errno;
1554
1555                         ldap_get_option(ldap_state->ldap_struct,
1556                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1557
1558                         ldap_get_option(ldap_state->ldap_struct,
1559                                         LDAP_OPT_ERROR_STRING, &ld_error);
1560                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1561                                    "(%s)\n", dn, ld_errno,
1562                                    ldap_err2string(rc),
1563                                    ld_error ? ld_error : "unknown"));
1564                         SAFE_FREE(ld_error);
1565
1566                         if (ld_errno == LDAP_SERVER_DOWN) {
1567                                 ldap_unbind(ldap_state->ldap_struct);
1568                                 ldap_state->ldap_struct = NULL;
1569                         }
1570                 }
1571         }
1572         
1573         TALLOC_FREE(utf8_dn);
1574         return rc;
1575 }
1576
1577 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1578 {
1579         int             rc = LDAP_SERVER_DOWN;
1580         int             attempts = 0;
1581         char           *utf8_dn;
1582         time_t          endtime = time(NULL)+lp_ldap_timeout();
1583         size_t          converted_size;
1584         
1585         SMB_ASSERT(ldap_state);
1586
1587         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1588
1589         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1590                 return LDAP_NO_MEMORY;
1591         }
1592
1593         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1594                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1595                 if (rc != LDAP_SUCCESS) {
1596                         char *ld_error = NULL;
1597                         int ld_errno;
1598
1599                         ldap_get_option(ldap_state->ldap_struct,
1600                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1601
1602                         ldap_get_option(ldap_state->ldap_struct,
1603                                         LDAP_OPT_ERROR_STRING, &ld_error);
1604                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1605                                    "(%s)\n", dn, ld_errno,
1606                                    ldap_err2string(rc),
1607                                    ld_error ? ld_error : "unknown"));
1608                         SAFE_FREE(ld_error);
1609
1610                         if (ld_errno == LDAP_SERVER_DOWN) {
1611                                 ldap_unbind(ldap_state->ldap_struct);
1612                                 ldap_state->ldap_struct = NULL;
1613                         }
1614                 }
1615         }
1616         
1617         TALLOC_FREE(utf8_dn);
1618         return rc;
1619 }
1620
1621 int smbldap_extended_operation(struct smbldap_state *ldap_state, 
1622                                LDAP_CONST char *reqoid, struct berval *reqdata, 
1623                                LDAPControl **serverctrls, LDAPControl **clientctrls, 
1624                                char **retoidp, struct berval **retdatap)
1625 {
1626         int             rc = LDAP_SERVER_DOWN;
1627         int             attempts = 0;
1628         time_t          endtime = time(NULL)+lp_ldap_timeout();
1629         
1630         if (!ldap_state)
1631                 return (-1);
1632
1633         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1634                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1635                                                reqdata, serverctrls,
1636                                                clientctrls, retoidp, retdatap);
1637                 if (rc != LDAP_SUCCESS) {
1638                         char *ld_error = NULL;
1639                         int ld_errno;
1640
1641                         ldap_get_option(ldap_state->ldap_struct,
1642                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1643
1644                         ldap_get_option(ldap_state->ldap_struct,
1645                                         LDAP_OPT_ERROR_STRING, &ld_error);
1646                         DEBUG(10, ("Extended operation failed with error: "
1647                                    "%d (%s) (%s)\n", ld_errno,
1648                                    ldap_err2string(rc),
1649                                    ld_error ? ld_error : "unknown"));
1650                         SAFE_FREE(ld_error);
1651
1652                         if (ld_errno == LDAP_SERVER_DOWN) {
1653                                 ldap_unbind(ldap_state->ldap_struct);
1654                                 ldap_state->ldap_struct = NULL;
1655                         }
1656                 }
1657         }
1658                 
1659         return rc;
1660 }
1661
1662 /*******************************************************************
1663  run the search by name.
1664 ******************************************************************/
1665 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1666                            const char *filter, const char **search_attr,
1667                            LDAPMessage ** result)
1668 {
1669         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1670                               filter, search_attr, 0, result);
1671 }
1672
1673 static void smbldap_idle_fn(struct event_context *event_ctx,
1674                             struct timed_event *te,
1675                             struct timeval now,
1676                             void *private_data)
1677 {
1678         struct smbldap_state *state = (struct smbldap_state *)private_data;
1679
1680         TALLOC_FREE(state->idle_event);
1681
1682         if (state->ldap_struct == NULL) {
1683                 DEBUG(10,("ldap connection not connected...\n"));
1684                 return;
1685         }
1686                 
1687         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1688                 DEBUG(10,("ldap connection not idle...\n"));
1689
1690                 state->idle_event = event_add_timed(
1691                         event_ctx, NULL,
1692                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1693                         smbldap_idle_fn,
1694                         private_data);
1695                 return;
1696         }
1697                 
1698         DEBUG(7,("ldap connection idle...closing connection\n"));
1699         smbldap_close(state);
1700 }
1701
1702 /**********************************************************************
1703  Housekeeping
1704  *********************************************************************/
1705
1706 void smbldap_free_struct(struct smbldap_state **ldap_state) 
1707 {
1708         smbldap_close(*ldap_state);
1709         
1710         if ((*ldap_state)->bind_secret) {
1711                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1712         }
1713
1714         SAFE_FREE((*ldap_state)->bind_dn);
1715         SAFE_FREE((*ldap_state)->bind_secret);
1716
1717         TALLOC_FREE((*ldap_state)->idle_event);
1718
1719         *ldap_state = NULL;
1720
1721         /* No need to free any further, as it is talloc()ed */
1722 }
1723
1724
1725 /**********************************************************************
1726  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1727  *********************************************************************/
1728
1729 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1730                       const char *location,
1731                       struct smbldap_state **smbldap_state)
1732 {
1733         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1734         if (!*smbldap_state) {
1735                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1736                 return NT_STATUS_NO_MEMORY;
1737         }
1738
1739         if (location) {
1740                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1741         } else {
1742                 (*smbldap_state)->uri = "ldap://localhost";
1743         }
1744
1745         (*smbldap_state)->event_context = event_ctx;
1746
1747         return NT_STATUS_OK;
1748 }
1749
1750  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1751                          LDAPMessage *entry)
1752 {
1753         char *utf8_dn, *unix_dn;
1754         size_t converted_size;
1755
1756         utf8_dn = ldap_get_dn(ld, entry);
1757         if (!utf8_dn) {
1758                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1759                 return NULL;
1760         }
1761         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1762                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1763                            "[%s]\n", utf8_dn));
1764                 return NULL;
1765         }
1766         ldap_memfree(utf8_dn);
1767         return unix_dn;
1768 }
1769
1770 /*******************************************************************
1771  Check if root-dse has a certain Control or Extension
1772 ********************************************************************/
1773
1774 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value) 
1775 {
1776         LDAPMessage *msg = NULL;
1777         LDAPMessage *entry = NULL;
1778         char **values = NULL;
1779         int rc, num_result, num_values, i;
1780         bool result = False;
1781
1782         if (!attrs[0]) {
1783                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1784                 return False;
1785         }
1786
1787         if (!strequal(attrs[0], "supportedExtension") && 
1788             !strequal(attrs[0], "supportedControl") && 
1789             !strequal(attrs[0], "namingContexts")) {
1790                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1791                 return False;
1792         }
1793
1794         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE, 
1795                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1796
1797         if (rc != LDAP_SUCCESS) {
1798                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1799                 return False;
1800         }
1801
1802         num_result = ldap_count_entries(ld, msg);
1803
1804         if (num_result != 1) {
1805                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1806                 goto done;
1807         }
1808
1809         entry = ldap_first_entry(ld, msg);
1810
1811         if (entry == NULL) {
1812                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1813                 goto done;
1814         }
1815
1816         values = ldap_get_values(ld, entry, attrs[0]);
1817
1818         if (values == NULL) {
1819                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1820                 goto done;
1821         }
1822
1823         num_values = ldap_count_values(values);
1824
1825         if (num_values == 0) {
1826                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1827                 goto done;
1828         }
1829
1830         for (i=0; i<num_values; i++) {
1831                 if (strcmp(values[i], value) == 0)
1832                         result = True;
1833         }
1834
1835
1836  done:
1837         if (values != NULL)
1838                 ldap_value_free(values);
1839         if (msg != NULL)
1840                 ldap_msgfree(msg);
1841
1842         return result;
1843
1844 }
1845
1846 /*******************************************************************
1847  Check if LDAP-Server supports a certain Control (OID in string format)
1848 ********************************************************************/
1849
1850 bool smbldap_has_control(LDAP *ld, const char *control)
1851 {
1852         const char *attrs[] = { "supportedControl", NULL };
1853         return smbldap_check_root_dse(ld, attrs, control);
1854 }
1855
1856 /*******************************************************************
1857  Check if LDAP-Server supports a certain Extension (OID in string format)
1858 ********************************************************************/
1859
1860 bool smbldap_has_extension(LDAP *ld, const char *extension)
1861 {
1862         const char *attrs[] = { "supportedExtension", NULL };
1863         return smbldap_check_root_dse(ld, attrs, extension);
1864 }
1865
1866 /*******************************************************************
1867  Check if LDAP-Server holds a given namingContext
1868 ********************************************************************/
1869
1870 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1871 {
1872         const char *attrs[] = { "namingContexts", NULL };
1873         return smbldap_check_root_dse(ld, attrs, naming_context);
1874 }
1875
1876 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1877 {
1878         ldap_state->anonymous = anon;
1879
1880         /* free any previously set credential */
1881
1882         SAFE_FREE(ldap_state->bind_dn);
1883         if (ldap_state->bind_secret) {
1884                 /* make sure secrets are zeroed out of memory */
1885                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1886                 SAFE_FREE(ldap_state->bind_secret);
1887         }
1888
1889         if ( ! anon) {
1890                 ldap_state->bind_dn = SMB_STRDUP(dn);
1891                 ldap_state->bind_secret = SMB_STRDUP(secret);
1892         }
1893
1894         return True;
1895 }