source/lib/smbldap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    LDAP protocol helper functions for SAMBA
   4    Copyright (C) Jean François Micouleau       1998
   5    Copyright (C) Gerald Carter                  2001-2003
   6    Copyright (C) Shahms King                    2001
   7    Copyright (C) Andrew Bartlett                2002-2003
   8    Copyright (C) Stefan (metze) Metzmacher      2002-2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 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, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 */
  25
  26 #include "includes.h"
  27 #include "smbldap.h"
  28
  29 #ifndef LDAP_OPT_SUCCESS
  30 #define LDAP_OPT_SUCCESS 0
  31 #endif
  32
  33 /* Try not to hit the up or down server forever */
  34
  35 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  36 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  37
  38 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  39
  40
  41 /* attributes used by Samba 2.2 */
  42
  43 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  44         { LDAP_ATTR_UID,                "uid"           },
  45         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  46         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  47         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  48         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  49         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  50         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  51         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  52         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  53         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  54         { LDAP_ATTR_CN,                 "cn"            },
  55         { LDAP_ATTR_SN,                 "sn"            },
  56         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  57         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  58         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  59         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  60         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  61         { LDAP_ATTR_DESC,               "description"   },
  62         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  63         { LDAP_ATTR_USER_RID,           "rid"           },
  64         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  65         { LDAP_ATTR_LMPW,               "lmPassword"    },
  66         { LDAP_ATTR_NTPW,               "ntPassword"    },
  67         { LDAP_ATTR_DOMAIN,             "domain"        },
  68         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  69         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  70         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  71         { LDAP_ATTR_LIST_END,           NULL            }
  72 };
  73
  74 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  75         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  76         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  77         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  78         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  79         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  80         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  81         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  82         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  83         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  84         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  85         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  86         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  87         { LDAP_ATTR_USER_RID,           "rid"           },
  88         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  89         { LDAP_ATTR_LMPW,               "lmPassword"    },
  90         { LDAP_ATTR_NTPW,               "ntPassword"    },
  91         { LDAP_ATTR_DOMAIN,             "domain"        },
  92         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  93         { LDAP_ATTR_LIST_END,           NULL            }
  94 };
  95
  96 /* attributes used by Samba 3.0's sambaSamAccount */
  97
  98 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  99         { LDAP_ATTR_UID,                "uid"                   },
 100         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 101         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 102         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
 103         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 104         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 105         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 106         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 107         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 108         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 109         { LDAP_ATTR_CN,                 "cn"                    },
 110         { LDAP_ATTR_SN,                 "sn"                    },
 111         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 112         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 113         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 114         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 115         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 116         { LDAP_ATTR_DESC,               "description"           },
 117         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 118         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 119         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 120         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 121         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 122         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 123         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 124         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 125         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 126         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 127         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 128         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 129         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 130         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 131         { LDAP_ATTR_LIST_END,           NULL                    }
 132 };
 133
 134 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 135         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 136         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 137         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 138         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 139         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 140         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 141         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 142         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 143         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 144         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 145         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 146         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 147         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 148         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 149         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 150         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 151         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 152         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 153         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 154         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 155         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 156         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 157         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 158         { LDAP_ATTR_LIST_END,           NULL                    }
 159 };
 160
 161 /* attributes used for allocating RIDs */
 162
 163 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 164         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 165         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 166         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 167         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 168         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 169         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 170         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 171         { LDAP_ATTR_LIST_END,           NULL                    },
 172 };
 173
 174 /* Samba 3.0 group mapping attributes */
 175
 176 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 177         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 178         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 179         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 180         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 181         { LDAP_ATTR_DESC,               "description"           },
 182         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 183         { LDAP_ATTR_CN,                 "cn"                    },
 184         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 185         { LDAP_ATTR_LIST_END,           NULL                    }
 186 };
 187
 188 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 189         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 190         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 191         { LDAP_ATTR_DESC,               "description"           },
 192         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 193         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 194         { LDAP_ATTR_LIST_END,           NULL                    }
 195 };
 196
 197 /* idmap_ldap sambaUnixIdPool */
 198
 199 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 200         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 201         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 202         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 203         { LDAP_ATTR_LIST_END,           NULL                    }
 204 };
 205
 206 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 207         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 208         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 209         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 210         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 211         { LDAP_ATTR_LIST_END,           NULL                    }
 212 };
 213
 214 /**********************************************************************
 215  perform a simple table lookup and return the attribute name
 216  **********************************************************************/
 217
 218  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 219 {
 220         int i = 0;
 221
 222         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 223                 if ( table[i].attrib == key )
 224                         return table[i].name;
 225                 i++;
 226         }
 227
 228         return NULL;
 229 }
 230
 231
 232 /**********************************************************************
 233  Return the list of attribute names from a mapping table
 234  **********************************************************************/
 235
 236  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 237 {
 238         const char **names;
 239         int i = 0;
 240
 241         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 242                 i++;
 243         i++;
 244
 245         names = TALLOC_ARRAY( mem_ctx, const char*, i );
 246         if ( !names ) {
 247                 DEBUG(0,("get_attr_list: out of memory\n"));
 248                 return NULL;
 249         }
 250
 251         i = 0;
 252         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 253                 names[i] = talloc_strdup( names, table[i].name );
 254                 i++;
 255         }
 256         names[i] = NULL;
 257
 258         return names;
 259 }
 260
 261 /*******************************************************************
 262  Search an attribute and return the first value found.
 263 ******************************************************************/
 264
 265  BOOL smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 266                                     const char *attribute, char *value,
 267                                     int max_len)
 268 {
 269         char **values;
 270
 271         if ( !attribute )
 272                 return False;
 273
 274         value[0] = '\0';
 275
 276         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 277                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 278
 279                 return False;
 280         }
 281
 282         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 283                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 284                           attribute, values[0]));
 285                 ldap_value_free(values);
 286                 return False;
 287         }
 288
 289         ldap_value_free(values);
 290 #ifdef DEBUG_PASSWORDS
 291         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 292 #endif
 293         return True;
 294 }
 295
 296  BOOL smbldap_get_single_pstring (LDAP * ldap_struct, LDAPMessage * entry,
 297                                   const char *attribute, pstring value)
 298 {
 299         return smbldap_get_single_attribute(ldap_struct, entry,
 300                                             attribute, value,
 301                                             sizeof(pstring));
 302 }
 303
 304  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 305                                         const char *attribute,
 306                                         TALLOC_CTX *mem_ctx)
 307 {
 308         char **values;
 309         char *result;
 310
 311         if (attribute == NULL) {
 312                 return NULL;
 313         }
 314
 315         values = ldap_get_values(ldap_struct, entry, attribute);
 316
 317         if (values == NULL) {
 318                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 319                 return NULL;
 320         }
 321
 322         if (ldap_count_values(values) != 1) {
 323                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 324                            attribute, ldap_count_values(values)));
 325                 ldap_value_free(values);
 326                 return NULL;
 327         }
 328
 329         if (pull_utf8_talloc(mem_ctx, &result, values[0]) == (size_t)-1) {
 330                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 331                 ldap_value_free(values);
 332                 return NULL;
 333         }
 334
 335         ldap_value_free(values);
 336
 337 #ifdef DEBUG_PASSWORDS
 338         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 339                      attribute, result));
 340 #endif
 341         return result;
 342 }
 343
 344  static int ldapmsg_destructor(LDAPMessage **result) {
 345         ldap_msgfree(*result);
 346         return 0;
 347 }
 348
 349  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 350 {
 351         LDAPMessage **handle;
 352
 353         if (result == NULL) {
 354                 return;
 355         }
 356
 357         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 358         SMB_ASSERT(handle != NULL);
 359
 360         *handle = result;
 361         talloc_set_destructor(handle, ldapmsg_destructor);
 362 }
 363
 364  static int ldapmod_destructor(LDAPMod ***mod) {
 365         ldap_mods_free(*mod, True);
 366         return 0;
 367 }
 368
 369  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 370 {
 371         LDAPMod ***handle;
 372
 373         if (mod == NULL) {
 374                 return;
 375         }
 376
 377         handle = TALLOC_P(mem_ctx, LDAPMod **);
 378         SMB_ASSERT(handle != NULL);
 379
 380         *handle = mod;
 381         talloc_set_destructor(handle, ldapmod_destructor);
 382 }
 383
 384 /************************************************************************
 385  Routine to manage the LDAPMod structure array
 386  manage memory used by the array, by each struct, and values
 387  ***********************************************************************/
 388
 389  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 390 {
 391         LDAPMod **mods;
 392         int i;
 393         int j;
 394
 395         mods = *modlist;
 396
 397         /* sanity checks on the mod values */
 398
 399         if (attribute == NULL || *attribute == '\0') {
 400                 return;
 401         }
 402
 403 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 404            left here so other do not re-add similar code   --jerry */
 405         if (value == NULL || *value == '\0')
 406                 return;
 407 #endif
 408
 409         if (mods == NULL) {
 410                 mods = SMB_MALLOC_P(LDAPMod *);
 411                 if (mods == NULL) {
 412                         smb_panic("smbldap_set_mod: out of memory!\n");
 413                         /* notreached. */
 414                         abort();
 415                 }
 416                 mods[0] = NULL;
 417         }
 418
 419         for (i = 0; mods[i] != NULL; ++i) {
 420                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 421                         break;
 422         }
 423
 424         if (mods[i] == NULL) {
 425                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 426                 if (mods == NULL) {
 427                         smb_panic("smbldap_set_mod: out of memory!\n");
 428                         /* notreached. */
 429                         abort();
 430                 }
 431                 mods[i] = SMB_MALLOC_P(LDAPMod);
 432                 if (mods[i] == NULL) {
 433                         smb_panic("smbldap_set_mod: out of memory!\n");
 434                         /* notreached. */
 435                         abort();
 436                 }
 437                 mods[i]->mod_op = modop;
 438                 mods[i]->mod_values = NULL;
 439                 mods[i]->mod_type = SMB_STRDUP(attribute);
 440                 mods[i + 1] = NULL;
 441         }
 442
 443         if (value != NULL) {
 444                 char *utf8_value = NULL;
 445
 446                 j = 0;
 447                 if (mods[i]->mod_values != NULL) {
 448                         for (; mods[i]->mod_values[j] != NULL; j++);
 449                 }
 450                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 451
 452                 if (mods[i]->mod_values == NULL) {
 453                         smb_panic("smbldap_set_mod: out of memory!\n");
 454                         /* notreached. */
 455                         abort();
 456                 }
 457
 458                 if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) {
 459                         smb_panic("smbldap_set_mod: String conversion failure!\n");
 460                         /* notreached. */
 461                         abort();
 462                 }
 463
 464                 mods[i]->mod_values[j] = utf8_value;
 465
 466                 mods[i]->mod_values[j + 1] = NULL;
 467         }
 468         *modlist = mods;
 469 }
 470
 471 /**********************************************************************
 472   Set attribute to newval in LDAP, regardless of what value the
 473   attribute had in LDAP before.
 474 *********************************************************************/
 475
 476  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 477                       LDAPMod ***mods,
 478                       const char *attribute, const char *newval)
 479 {
 480         char oldval[2048]; /* current largest allowed value is mungeddial */
 481         BOOL existed;
 482
 483         if (attribute == NULL) {
 484                 /* This can actually happen for ldapsam_compat where we for
 485                  * example don't have a password history */
 486                 return;
 487         }
 488
 489         if (existing != NULL) {
 490                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 491         } else {
 492                 existed = False;
 493                 *oldval = '\0';
 494         }
 495
 496         /* all of our string attributes are case insensitive */
 497
 498         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 499
 500                 /* Believe it or not, but LDAP will deny a delete and
 501                    an add at the same time if the values are the
 502                    same... */
 503                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 504                 return;
 505         }
 506
 507         if (existed) {
 508                 /* There has been no value before, so don't delete it.
 509                  * Here's a possible race: We might end up with
 510                  * duplicate attributes */
 511                 /* By deleting exactly the value we found in the entry this
 512                  * should be race-free in the sense that the LDAP-Server will
 513                  * deny the complete operation if somebody changed the
 514                  * attribute behind our back. */
 515                 /* This will also allow modifying single valued attributes
 516                  * in Novell NDS. In NDS you have to first remove attribute and then
 517                  * you could add new value */
 518
 519                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 520                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 521         }
 522
 523         /* Regardless of the real operation (add or modify)
 524            we add the new value here. We rely on deleting
 525            the old value, should it exist. */
 526
 527         if ((newval != NULL) && (strlen(newval) > 0)) {
 528                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 529                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 530         }
 531 }
 532
 533 /**********************************************************************
 534  Some varients of the LDAP rebind code do not pass in the third 'arg'
 535  pointer to a void*, so we try and work around it by assuming that the
 536  value of the 'LDAP *' pointer is the same as the one we had passed in
 537  **********************************************************************/
 538
 539 struct smbldap_state_lookup {
 540         LDAP *ld;
 541         struct smbldap_state *smbldap_state;
 542         struct smbldap_state_lookup *prev, *next;
 543 };
 544
 545 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 546
 547 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 548 {
 549         struct smbldap_state_lookup *t;
 550
 551         for (t = smbldap_state_lookup_list; t; t = t->next) {
 552                 if (t->ld == ld) {
 553                         return t->smbldap_state;
 554                 }
 555         }
 556         return NULL;
 557 }
 558
 559 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 560 {
 561         struct smbldap_state_lookup *t;
 562
 563         for (t = smbldap_state_lookup_list; t; t = t->next) {
 564                 if (t->smbldap_state == smbldap_state) {
 565                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 566                         SAFE_FREE(t);
 567                         return;
 568                 }
 569         }
 570 }
 571
 572 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 573 {
 574         struct smbldap_state *tmp_ldap_state;
 575         struct smbldap_state_lookup *t;
 576
 577         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 578                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 579                 return;
 580         }
 581
 582         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 583         ZERO_STRUCTP(t);
 584
 585         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 586         t->ld = ld;
 587         t->smbldap_state = smbldap_state;
 588 }
 589
 590 /********************************************************************
 591  start TLS on an existing LDAP connection
 592 *******************************************************************/
 593
 594 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 595 {
 596         int rc;
 597
 598         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 599                 return LDAP_SUCCESS;
 600         }
 601
 602 #ifdef LDAP_OPT_X_TLS
 603         if (version != LDAP_VERSION3) {
 604                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 605                 return LDAP_OPERATIONS_ERROR;
 606         }
 607
 608         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 609                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 610                          ldap_err2string(rc)));
 611                 return rc;
 612         }
 613
 614         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 615         return LDAP_SUCCESS;
 616 #else
 617         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 618         return LDAP_OPERATIONS_ERROR;
 619 #endif
 620 }
 621
 622 /********************************************************************
 623  setup a connection to the LDAP server based on a uri
 624 *******************************************************************/
 625
 626 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 627 {
 628         int rc;
 629
 630         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 631
 632 #ifdef HAVE_LDAP_INITIALIZE
 633
 634         rc = ldap_initialize(ldap_struct, uri);
 635         if (rc) {
 636                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 637         }
 638
 639         return rc;
 640 #else
 641
 642         /* Parse the string manually */
 643
 644         {
 645                 int port = 0;
 646                 fstring protocol;
 647                 fstring host;
 648                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 649
 650
 651                 /* skip leading "URL:" (if any) */
 652                 if ( strnequal( uri, "URL:", 4 ) ) {
 653                         uri += 4;
 654                 }
 655
 656                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 657
 658                 if (port == 0) {
 659                         if (strequal(protocol, "ldap")) {
 660                                 port = LDAP_PORT;
 661                         } else if (strequal(protocol, "ldaps")) {
 662                                 port = LDAPS_PORT;
 663                         } else {
 664                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 665                         }
 666                 }
 667
 668                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 669                         DEBUG(0, ("ldap_init failed !\n"));
 670                         return LDAP_OPERATIONS_ERROR;
 671                 }
 672
 673                 if (strequal(protocol, "ldaps")) {
 674 #ifdef LDAP_OPT_X_TLS
 675                         int tls = LDAP_OPT_X_TLS_HARD;
 676                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 677                         {
 678                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 679                         }
 680
 681                         DEBUG(3,("LDAPS option set...!\n"));
 682 #else
 683                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 684                         return LDAP_OPERATIONS_ERROR;
 685 #endif /* LDAP_OPT_X_TLS */
 686                 }
 687
 688         }
 689 #endif /* HAVE_LDAP_INITIALIZE */
 690         return LDAP_SUCCESS;
 691 }
 692
 693 /********************************************************************
 694  try to upgrade to Version 3 LDAP if not already, in either case return current
 695  version
 696  *******************************************************************/
 697
 698 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 699 {
 700         int version;
 701         int rc;
 702
 703         /* assume the worst */
 704         *new_version = LDAP_VERSION2;
 705
 706         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 707         if (rc) {
 708                 return rc;
 709         }
 710
 711         if (version == LDAP_VERSION3) {
 712                 *new_version = LDAP_VERSION3;
 713                 return LDAP_SUCCESS;
 714         }
 715
 716         /* try upgrade */
 717         version = LDAP_VERSION3;
 718         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 719         if (rc) {
 720                 return rc;
 721         }
 722
 723         *new_version = LDAP_VERSION3;
 724         return LDAP_SUCCESS;
 725 }
 726
 727 /*******************************************************************
 728  open a connection to the ldap server (just until the bind)
 729  ******************************************************************/
 730
 731 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 732 {
 733         int rc, version;
 734
 735         rc = smb_ldap_setup_conn(ldap_struct, uri);
 736         if (rc) {
 737                 return rc;
 738         }
 739
 740         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 741         if (rc) {
 742                 return rc;
 743         }
 744
 745         rc = smb_ldap_start_tls(*ldap_struct, version);
 746         if (rc) {
 747                 return rc;
 748         }
 749
 750         return LDAP_SUCCESS;
 751 }
 752
 753 /*******************************************************************
 754  open a connection to the ldap server.
 755 ******************************************************************/
 756 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 757
 758 {
 759         int rc = LDAP_SUCCESS;
 760         int version;
 761         LDAP **ldap_struct = &ldap_state->ldap_struct;
 762
 763         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 764         if (rc) {
 765                 return rc;
 766         }
 767
 768         /* Store the LDAP pointer in a lookup list */
 769
 770         smbldap_store_state(*ldap_struct, ldap_state);
 771
 772         /* Upgrade to LDAPv3 if possible */
 773
 774         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 775         if (rc) {
 776                 return rc;
 777         }
 778
 779         /* Start TLS if required */
 780
 781         rc = smb_ldap_start_tls(*ldap_struct, version);
 782         if (rc) {
 783                 return rc;
 784         }
 785
 786         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 787         return rc;
 788 }
 789
 790 /*******************************************************************
 791  a rebind function for authenticated referrals
 792  This version takes a void* that we can shove useful stuff in :-)
 793 ******************************************************************/
 794 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 795 #else
 796 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 797                                    int *methodp, int freeit, void *arg)
 798 {
 799         struct smbldap_state *ldap_state = arg;
 800
 801         /** @TODO Should we be doing something to check what servers we rebind to?
 802             Could we get a referral to a machine that we don't want to give our
 803             username and password to? */
 804
 805         if (freeit) {
 806                 SAFE_FREE(*whop);
 807                 if (*credp) {
 808                         memset(*credp, '\0', strlen(*credp));
 809                 }
 810                 SAFE_FREE(*credp);
 811         } else {
 812                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 813                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 814
 815                 if (ldap_state->anonymous) {
 816                         *whop = NULL;
 817                         *credp = NULL;
 818                 } else {
 819                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 820                         if (!*whop) {
 821                                 return LDAP_NO_MEMORY;
 822                         }
 823                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 824                         if (!*credp) {
 825                                 SAFE_FREE(*whop);
 826                                 return LDAP_NO_MEMORY;
 827                         }
 828                 }
 829                 *methodp = LDAP_AUTH_SIMPLE;
 830         }
 831
 832         GetTimeOfDay(&ldap_state->last_rebind);
 833
 834         return 0;
 835 }
 836 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 837
 838 /*******************************************************************
 839  a rebind function for authenticated referrals
 840  This version takes a void* that we can shove useful stuff in :-)
 841  and actually does the connection.
 842 ******************************************************************/
 843 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 844 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 845                                           LDAP_CONST char *url,
 846                                           ber_tag_t request,
 847                                           ber_int_t msgid, void *arg)
 848 {
 849         struct smbldap_state *ldap_state =
 850                 (struct smbldap_state *)arg;
 851         int rc;
 852         int version;
 853
 854         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
 855                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 856
 857         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
 858          * itself) before rebinding to another LDAP server to avoid to expose
 859          * our credentials. At least *try* to secure the connection - Guenther */
 860
 861         smb_ldap_upgrade_conn(ldap_struct, &version);
 862         smb_ldap_start_tls(ldap_struct, version);
 863
 864         /** @TODO Should we be doing something to check what servers we rebind to?
 865             Could we get a referral to a machine that we don't want to give our
 866             username and password to? */
 867
 868         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 869
 870         /* only set the last rebind timestamp when we did rebind after a
 871          * non-read LDAP operation. That way we avoid the replication sleep
 872          * after a simple redirected search operation - Guenther */
 873
 874         switch (request) {
 875
 876                 case LDAP_REQ_MODIFY:
 877                 case LDAP_REQ_ADD:
 878                 case LDAP_REQ_DELETE:
 879                 case LDAP_REQ_MODDN:
 880                 case LDAP_REQ_EXTENDED:
 881                         DEBUG(10,("rebindproc_connect_with_state: "
 882                                 "setting last_rebind timestamp "
 883                                 "(req: 0x%02x)\n", (unsigned int)request));
 884                         GetTimeOfDay(&ldap_state->last_rebind);
 885                         break;
 886                 default:
 887                         ZERO_STRUCT(ldap_state->last_rebind);
 888                         break;
 889         }
 890
 891         return rc;
 892 }
 893 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 894
 895 /*******************************************************************
 896  Add a rebind function for authenticated referrals
 897 ******************************************************************/
 898 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 899 #else
 900 # if LDAP_SET_REBIND_PROC_ARGS == 2
 901 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 902                        int *method, int freeit )
 903 {
 904         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 905
 906         return rebindproc_with_state(ldap_struct, whop, credp,
 907                                      method, freeit, ldap_state);
 908
 909 }
 910 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 911 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 912
 913 /*******************************************************************
 914  a rebind function for authenticated referrals
 915  this also does the connection, but no void*.
 916 ******************************************************************/
 917 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 918 # if LDAP_SET_REBIND_PROC_ARGS == 2
 919 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 920                                ber_int_t msgid)
 921 {
 922         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 923
 924         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 925                                              ldap_state);
 926 }
 927 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 928 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 929
 930 /*******************************************************************
 931  connect to the ldap server under system privilege.
 932 ******************************************************************/
 933 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 934 {
 935         int rc;
 936         int version;
 937
 938         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
 939
 940                 /* get the default dn and password only if they are not set already */
 941                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
 942                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 943                         return LDAP_INVALID_CREDENTIALS;
 944                 }
 945         }
 946
 947         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 948            (OpenLDAP) doesnt' seem to support it */
 949
 950         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 951                   ldap_state->uri, ldap_state->bind_dn));
 952
 953 #ifdef HAVE_LDAP_SET_REBIND_PROC
 954 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 955 # if LDAP_SET_REBIND_PROC_ARGS == 2
 956         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 957 # endif
 958 # if LDAP_SET_REBIND_PROC_ARGS == 3
 959         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 960 # endif
 961 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 962 # if LDAP_SET_REBIND_PROC_ARGS == 2
 963         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 964 # endif
 965 # if LDAP_SET_REBIND_PROC_ARGS == 3
 966         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 967 # endif
 968 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 969 #endif
 970
 971         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 972
 973         if (rc != LDAP_SUCCESS) {
 974                 char *ld_error = NULL;
 975                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 976                                 &ld_error);
 977                 DEBUG(ldap_state->num_failures ? 2 : 0,
 978                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
 979                                ldap_state->uri,
 980                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
 981                                ldap_err2string(rc),
 982                                ld_error ? ld_error : "(unknown)"));
 983                 SAFE_FREE(ld_error);
 984                 ldap_state->num_failures++;
 985                 return rc;
 986         }
 987
 988         ldap_state->num_failures = 0;
 989         ldap_state->paged_results = False;
 990
 991         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 992
 993         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
 994                 ldap_state->paged_results = True;
 995         }
 996
 997         DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n"));
 998         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
 999                 ldap_state->paged_results ? "does" : "does not"));
1000         return rc;
1001 }
1002
1003 /**********************************************************************
1004  Connect to LDAP server (called before every ldap operation)
1005 *********************************************************************/
1006 static int smbldap_open(struct smbldap_state *ldap_state)
1007 {
1008         int rc, opt_rc;
1009         BOOL reopen = False;
1010         SMB_ASSERT(ldap_state);
1011
1012 #ifndef NO_LDAP_SECURITY
1013         if (geteuid() != 0) {
1014                 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
1015                 return  LDAP_INSUFFICIENT_ACCESS;
1016         }
1017 #endif
1018
1019         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1020
1021 #ifdef HAVE_UNIXSOCKET
1022                 struct sockaddr_un addr;
1023 #else
1024                 struct sockaddr addr;
1025 #endif
1026                 socklen_t len = sizeof(addr);
1027                 int sd;
1028
1029                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1030                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1031                         reopen = True;
1032
1033 #ifdef HAVE_UNIXSOCKET
1034                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1035                         reopen = True;
1036 #endif
1037                 if (reopen) {
1038                         /* the other end has died. reopen. */
1039                         ldap_unbind(ldap_state->ldap_struct);
1040                         ldap_state->ldap_struct = NULL;
1041                         ldap_state->last_ping = (time_t)0;
1042                 } else {
1043                         ldap_state->last_ping = time(NULL);
1044                 }
1045         }
1046
1047         if (ldap_state->ldap_struct != NULL) {
1048                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1049                 return LDAP_SUCCESS;
1050         }
1051
1052         if ((rc = smbldap_open_connection(ldap_state))) {
1053                 return rc;
1054         }
1055
1056         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1057                 ldap_unbind(ldap_state->ldap_struct);
1058                 ldap_state->ldap_struct = NULL;
1059                 return rc;
1060         }
1061
1062
1063         ldap_state->last_ping = time(NULL);
1064         ldap_state->pid = sys_getpid();
1065         DEBUG(4,("The LDAP server is succesfully connected\n"));
1066
1067         return LDAP_SUCCESS;
1068 }
1069
1070 /**********************************************************************
1071 Disconnect from LDAP server
1072 *********************************************************************/
1073 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1074 {
1075         if (!ldap_state)
1076                 return NT_STATUS_INVALID_PARAMETER;
1077
1078         if (ldap_state->ldap_struct != NULL) {
1079                 ldap_unbind(ldap_state->ldap_struct);
1080                 ldap_state->ldap_struct = NULL;
1081         }
1082
1083         smbldap_delete_state(ldap_state);
1084
1085         DEBUG(5,("The connection to the LDAP server was closed\n"));
1086         /* maybe free the results here --metze */
1087
1088         return NT_STATUS_OK;
1089 }
1090
1091 static BOOL got_alarm;
1092
1093 static void (*old_handler)(int);
1094
1095 static void gotalarm_sig(int dummy)
1096 {
1097         got_alarm = True;
1098 }
1099
1100 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1101                             int *attempts, time_t endtime)
1102 {
1103         time_t now = time(NULL);
1104         int open_rc = LDAP_SERVER_DOWN;
1105
1106         if (*rc != LDAP_SERVER_DOWN)
1107                 goto no_next;
1108
1109         if (now >= endtime) {
1110                 smbldap_close(ldap_state);
1111                 *rc = LDAP_TIMEOUT;
1112                 goto no_next;
1113         }
1114
1115         if (*attempts == 0) {
1116                 got_alarm = False;
1117                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1118                 alarm(endtime - now);
1119
1120                 if (ldap_state->pid != sys_getpid())
1121                         smbldap_close(ldap_state);
1122         }
1123
1124         while (1) {
1125
1126                 if (*attempts != 0)
1127                         smb_msleep(1000);
1128
1129                 *attempts += 1;
1130
1131                 open_rc = smbldap_open(ldap_state);
1132
1133                 if (open_rc == LDAP_SUCCESS) {
1134                         ldap_state->last_use = now;
1135                         return True;
1136                 }
1137
1138                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1139                         /* The fact that we are non-root or any other
1140                          * access-denied condition will not change in the next
1141                          * round of trying */
1142                         *rc = open_rc;
1143                         break;
1144                 }
1145
1146                 if (got_alarm) {
1147                         *rc = LDAP_TIMEOUT;
1148                         break;
1149                 }
1150
1151                 if (open_rc != LDAP_SUCCESS) {
1152                         DEBUG(1, ("Connection to LDAP server failed for the "
1153                                   "%d try!\n", *attempts));
1154                 }
1155         }
1156
1157  no_next:
1158         CatchSignal(SIGALRM, old_handler);
1159         alarm(0);
1160         ldap_state->last_use = now;
1161         return False;
1162 }
1163
1164 /*********************************************************************
1165  ********************************************************************/
1166
1167 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1168                               const char *base, int scope, const char *filter,
1169                               const char *attrs[], int attrsonly,
1170                               LDAPControl **sctrls, LDAPControl **cctrls,
1171                               int sizelimit, LDAPMessage **res)
1172 {
1173         int             rc = LDAP_SERVER_DOWN;
1174         int             attempts = 0;
1175         char           *utf8_filter;
1176         time_t          endtime = time(NULL)+lp_ldap_timeout();
1177         struct          timeval timeout;
1178
1179         SMB_ASSERT(ldap_state);
1180
1181         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1182                  "scope => [%d]\n", base, filter, scope));
1183
1184         if (ldap_state->last_rebind.tv_sec > 0) {
1185                 struct timeval  tval;
1186                 SMB_BIG_INT     tdiff = 0;
1187                 int             sleep_time = 0;
1188
1189                 ZERO_STRUCT(tval);
1190                 GetTimeOfDay(&tval);
1191
1192                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1193                 tdiff /= 1000; /* Convert to milliseconds. */
1194
1195                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1196                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1197
1198                 if (sleep_time > 0) {
1199                         /* we wait for the LDAP replication */
1200                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1201                                  "for LDAP replication.\n",sleep_time));
1202                         smb_msleep(sleep_time);
1203                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1204                 }
1205                 ZERO_STRUCT(ldap_state->last_rebind);
1206         }
1207
1208         if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
1209                 return LDAP_NO_MEMORY;
1210         }
1211
1212         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1213         timeout.tv_sec = lp_ldap_timeout();
1214         timeout.tv_usec = 0;
1215
1216         /* Setup alarm timeout.... Do we need both of these ? JRA.
1217          * Yes, I think we do need both of these. The server timeout only
1218          * covers the case where the server's operation takes too long. It
1219          * does not cover the case where the request hangs on its way to the
1220          * server. The server side timeout is not strictly necessary, it's
1221          * just a bit more kind to the server. VL. */
1222
1223         got_alarm = 0;
1224         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1225         alarm(lp_ldap_timeout());
1226         /* End setup timeout. */
1227
1228         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1229                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1230                                        utf8_filter,
1231                                        CONST_DISCARD(char **, attrs),
1232                                        attrsonly, sctrls, cctrls, &timeout,
1233                                        sizelimit, res);
1234                 if (rc != LDAP_SUCCESS) {
1235                         char *ld_error = NULL;
1236                         int ld_errno;
1237
1238                         ldap_get_option(ldap_state->ldap_struct,
1239                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1240
1241                         ldap_get_option(ldap_state->ldap_struct,
1242                                         LDAP_OPT_ERROR_STRING, &ld_error);
1243                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1244                                    "(%s)\n", base, ld_errno,
1245                                    ldap_err2string(rc),
1246                                    ld_error ? ld_error : "unknown"));
1247                         SAFE_FREE(ld_error);
1248
1249                         if (ld_errno == LDAP_SERVER_DOWN) {
1250                                 ldap_unbind(ldap_state->ldap_struct);
1251                                 ldap_state->ldap_struct = NULL;
1252                         }
1253                 }
1254         }
1255
1256         SAFE_FREE(utf8_filter);
1257
1258         /* Teardown timeout. */
1259         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1260         alarm(0);
1261
1262         if (got_alarm != 0)
1263                 return LDAP_TIMELIMIT_EXCEEDED;
1264
1265         return rc;
1266 }
1267
1268 int smbldap_search(struct smbldap_state *ldap_state,
1269                    const char *base, int scope, const char *filter,
1270                    const char *attrs[], int attrsonly,
1271                    LDAPMessage **res)
1272 {
1273         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1274                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1275 }
1276
1277 int smbldap_search_paged(struct smbldap_state *ldap_state,
1278                          const char *base, int scope, const char *filter,
1279                          const char **attrs, int attrsonly, int pagesize,
1280                          LDAPMessage **res, void **cookie)
1281 {
1282         LDAPControl     pr;
1283         LDAPControl     **rcontrols;
1284         LDAPControl     *controls[2] = { NULL, NULL};
1285         BerElement      *cookie_be = NULL;
1286         struct berval   *cookie_bv = NULL;
1287         int             tmp = 0, i, rc;
1288         BOOL            critical = True;
1289
1290         *res = NULL;
1291
1292         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1293                  "scope => [%d], pagesize => [%d]\n",
1294                  base, filter, scope, pagesize));
1295
1296         cookie_be = ber_alloc_t(LBER_USE_DER);
1297         if (cookie_be == NULL) {
1298                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1299                          "NULL\n"));
1300                 return LDAP_NO_MEMORY;
1301         }
1302
1303         /* construct cookie */
1304         if (*cookie != NULL) {
1305                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1306                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1307                 *cookie = NULL;
1308         } else {
1309                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1310         }
1311         ber_flatten(cookie_be, &cookie_bv);
1312
1313         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1314         pr.ldctl_iscritical = (char) critical;
1315         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1316         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1317
1318         controls[0] = &pr;
1319         controls[1] = NULL;
1320
1321         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1322                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1323
1324         ber_free(cookie_be, 1);
1325         ber_bvfree(cookie_bv);
1326
1327         if (rc != 0) {
1328                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1329                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1330                 goto done;
1331         }
1332
1333         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1334
1335         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1336                                NULL, NULL, &rcontrols,  0);
1337         if (rc != 0) {
1338                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1339                          "with [%s]\n", ldap_err2string(rc)));
1340                 goto done;
1341         }
1342
1343         if (rcontrols == NULL)
1344                 goto done;
1345
1346         for (i=0; rcontrols[i]; i++) {
1347
1348                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1349                         continue;
1350
1351                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1352                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1353                 /* the berval is the cookie, but must be freed when it is all
1354                    done */
1355                 if (cookie_bv->bv_len)
1356                         *cookie=ber_bvdup(cookie_bv);
1357                 else
1358                         *cookie=NULL;
1359                 ber_bvfree(cookie_bv);
1360                 ber_free(cookie_be, 1);
1361                 break;
1362         }
1363         ldap_controls_free(rcontrols);
1364 done:
1365         return rc;
1366 }
1367
1368 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1369 {
1370         int             rc = LDAP_SERVER_DOWN;
1371         int             attempts = 0;
1372         char           *utf8_dn;
1373         time_t          endtime = time(NULL)+lp_ldap_timeout();
1374
1375         SMB_ASSERT(ldap_state);
1376
1377         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1378
1379         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1380                 return LDAP_NO_MEMORY;
1381         }
1382
1383         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1384                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1385                 if (rc != LDAP_SUCCESS) {
1386                         char *ld_error = NULL;
1387                         int ld_errno;
1388
1389                         ldap_get_option(ldap_state->ldap_struct,
1390                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1391
1392                         ldap_get_option(ldap_state->ldap_struct,
1393                                         LDAP_OPT_ERROR_STRING, &ld_error);
1394                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1395                                    "(%s)\n", dn, ld_errno,
1396                                    ldap_err2string(rc),
1397                                    ld_error ? ld_error : "unknown"));
1398                         SAFE_FREE(ld_error);
1399
1400                         if (ld_errno == LDAP_SERVER_DOWN) {
1401                                 ldap_unbind(ldap_state->ldap_struct);
1402                                 ldap_state->ldap_struct = NULL;
1403                         }
1404                 }
1405         }
1406
1407         SAFE_FREE(utf8_dn);
1408         return rc;
1409 }
1410
1411 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1412 {
1413         int             rc = LDAP_SERVER_DOWN;
1414         int             attempts = 0;
1415         char           *utf8_dn;
1416         time_t          endtime = time(NULL)+lp_ldap_timeout();
1417
1418         SMB_ASSERT(ldap_state);
1419
1420         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1421
1422         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1423                 return LDAP_NO_MEMORY;
1424         }
1425
1426         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1427                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1428                 if (rc != LDAP_SUCCESS) {
1429                         char *ld_error = NULL;
1430                         int ld_errno;
1431
1432                         ldap_get_option(ldap_state->ldap_struct,
1433                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1434
1435                         ldap_get_option(ldap_state->ldap_struct,
1436                                         LDAP_OPT_ERROR_STRING, &ld_error);
1437                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1438                                    "(%s)\n", dn, ld_errno,
1439                                    ldap_err2string(rc),
1440                                    ld_error ? ld_error : "unknown"));
1441                         SAFE_FREE(ld_error);
1442
1443                         if (ld_errno == LDAP_SERVER_DOWN) {
1444                                 ldap_unbind(ldap_state->ldap_struct);
1445                                 ldap_state->ldap_struct = NULL;
1446                         }
1447                 }
1448         }
1449
1450         SAFE_FREE(utf8_dn);
1451         return rc;
1452 }
1453
1454 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1455 {
1456         int             rc = LDAP_SERVER_DOWN;
1457         int             attempts = 0;
1458         char           *utf8_dn;
1459         time_t          endtime = time(NULL)+lp_ldap_timeout();
1460
1461         SMB_ASSERT(ldap_state);
1462
1463         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1464
1465         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1466                 return LDAP_NO_MEMORY;
1467         }
1468
1469         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1470                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1471                 if (rc != LDAP_SUCCESS) {
1472                         char *ld_error = NULL;
1473                         int ld_errno;
1474
1475                         ldap_get_option(ldap_state->ldap_struct,
1476                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1477
1478                         ldap_get_option(ldap_state->ldap_struct,
1479                                         LDAP_OPT_ERROR_STRING, &ld_error);
1480                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1481                                    "(%s)\n", dn, ld_errno,
1482                                    ldap_err2string(rc),
1483                                    ld_error ? ld_error : "unknown"));
1484                         SAFE_FREE(ld_error);
1485
1486                         if (ld_errno == LDAP_SERVER_DOWN) {
1487                                 ldap_unbind(ldap_state->ldap_struct);
1488                                 ldap_state->ldap_struct = NULL;
1489                         }
1490                 }
1491         }
1492
1493         SAFE_FREE(utf8_dn);
1494         return rc;
1495 }
1496
1497 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1498                                LDAP_CONST char *reqoid, struct berval *reqdata,
1499                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1500                                char **retoidp, struct berval **retdatap)
1501 {
1502         int             rc = LDAP_SERVER_DOWN;
1503         int             attempts = 0;
1504         time_t          endtime = time(NULL)+lp_ldap_timeout();
1505
1506         if (!ldap_state)
1507                 return (-1);
1508
1509         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1510                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1511                                                reqdata, serverctrls,
1512                                                clientctrls, retoidp, retdatap);
1513                 if (rc != LDAP_SUCCESS) {
1514                         char *ld_error = NULL;
1515                         int ld_errno;
1516
1517                         ldap_get_option(ldap_state->ldap_struct,
1518                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1519
1520                         ldap_get_option(ldap_state->ldap_struct,
1521                                         LDAP_OPT_ERROR_STRING, &ld_error);
1522                         DEBUG(10, ("Extended operation failed with error: "
1523                                    "%d (%s) (%s)\n", ld_errno,
1524                                    ldap_err2string(rc),
1525                                    ld_error ? ld_error : "unknown"));
1526                         SAFE_FREE(ld_error);
1527
1528                         if (ld_errno == LDAP_SERVER_DOWN) {
1529                                 ldap_unbind(ldap_state->ldap_struct);
1530                                 ldap_state->ldap_struct = NULL;
1531                         }
1532                 }
1533         }
1534
1535         return rc;
1536 }
1537
1538 /*******************************************************************
1539  run the search by name.
1540 ******************************************************************/
1541 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1542                            const char *filter, const char **search_attr,
1543                            LDAPMessage ** result)
1544 {
1545         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1546                               filter, search_attr, 0, result);
1547 }
1548
1549 static void smbldap_idle_fn(void **data, time_t *interval, time_t now)
1550 {
1551         struct smbldap_state *state = (struct smbldap_state *)(*data);
1552
1553         if (state->ldap_struct == NULL) {
1554                 DEBUG(10,("ldap connection not connected...\n"));
1555                 return;
1556         }
1557
1558         if ((state->last_use+SMBLDAP_IDLE_TIME) > now) {
1559                 DEBUG(10,("ldap connection not idle...\n"));
1560                 return;
1561         }
1562
1563         DEBUG(7,("ldap connection idle...closing connection\n"));
1564         smbldap_close(state);
1565 }
1566
1567 /**********************************************************************
1568  Housekeeping
1569  *********************************************************************/
1570
1571 void smbldap_free_struct(struct smbldap_state **ldap_state)
1572 {
1573         smbldap_close(*ldap_state);
1574
1575         if ((*ldap_state)->bind_secret) {
1576                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1577         }
1578
1579         SAFE_FREE((*ldap_state)->bind_dn);
1580         SAFE_FREE((*ldap_state)->bind_secret);
1581
1582         smb_unregister_idle_event((*ldap_state)->event_id);
1583
1584         *ldap_state = NULL;
1585
1586         /* No need to free any further, as it is talloc()ed */
1587 }
1588
1589
1590 /**********************************************************************
1591  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1592  *********************************************************************/
1593
1594 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, const char *location, struct smbldap_state **smbldap_state)
1595 {
1596         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1597         if (!*smbldap_state) {
1598                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1599                 return NT_STATUS_NO_MEMORY;
1600         }
1601
1602         if (location) {
1603                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1604         } else {
1605                 (*smbldap_state)->uri = "ldap://localhost";
1606         }
1607
1608         (*smbldap_state)->event_id =
1609                 smb_register_idle_event(smbldap_idle_fn, (void *)(*smbldap_state),
1610                                         SMBLDAP_IDLE_TIME);
1611
1612         if ((*smbldap_state)->event_id == SMB_EVENT_ID_INVALID) {
1613                 DEBUG(0,("Failed to register LDAP idle event!\n"));
1614                 return NT_STATUS_INVALID_HANDLE;
1615         }
1616
1617         return NT_STATUS_OK;
1618 }
1619
1620 /*******************************************************************
1621  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1622 ********************************************************************/
1623 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1624 {
1625         char *utf8_dn, *unix_dn;
1626
1627         utf8_dn = ldap_get_dn(ld, entry);
1628         if (!utf8_dn) {
1629                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1630                 return NULL;
1631         }
1632         if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
1633                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
1634                 return NULL;
1635         }
1636         ldap_memfree(utf8_dn);
1637         return unix_dn;
1638 }
1639
1640  const char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1641                                LDAPMessage *entry)
1642 {
1643         char *utf8_dn, *unix_dn;
1644
1645         utf8_dn = ldap_get_dn(ld, entry);
1646         if (!utf8_dn) {
1647                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1648                 return NULL;
1649         }
1650         if (pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn) == (size_t)-1) {
1651                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1652                            "[%s]\n", utf8_dn));
1653                 return NULL;
1654         }
1655         ldap_memfree(utf8_dn);
1656         return unix_dn;
1657 }
1658
1659 /*******************************************************************
1660  Check if root-dse has a certain Control or Extension
1661 ********************************************************************/
1662
1663 static BOOL smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1664 {
1665         LDAPMessage *msg = NULL;
1666         LDAPMessage *entry = NULL;
1667         char **values = NULL;
1668         int rc, num_result, num_values, i;
1669         BOOL result = False;
1670
1671         if (!attrs[0]) {
1672                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1673                 return False;
1674         }
1675
1676         if (!strequal(attrs[0], "supportedExtension") &&
1677             !strequal(attrs[0], "supportedControl") &&
1678             !strequal(attrs[0], "namingContexts")) {
1679                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1680                 return False;
1681         }
1682
1683         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1684                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1685
1686         if (rc != LDAP_SUCCESS) {
1687                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1688                 return False;
1689         }
1690
1691         num_result = ldap_count_entries(ld, msg);
1692
1693         if (num_result != 1) {
1694                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1695                 goto done;
1696         }
1697
1698         entry = ldap_first_entry(ld, msg);
1699
1700         if (entry == NULL) {
1701                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1702                 goto done;
1703         }
1704
1705         values = ldap_get_values(ld, entry, attrs[0]);
1706
1707         if (values == NULL) {
1708                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1709                 goto done;
1710         }
1711
1712         num_values = ldap_count_values(values);
1713
1714         if (num_values == 0) {
1715                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1716                 goto done;
1717         }
1718
1719         for (i=0; i<num_values; i++) {
1720                 if (strcmp(values[i], value) == 0)
1721                         result = True;
1722         }
1723
1724
1725  done:
1726         if (values != NULL)
1727                 ldap_value_free(values);
1728         if (msg != NULL)
1729                 ldap_msgfree(msg);
1730
1731         return result;
1732
1733 }
1734
1735 /*******************************************************************
1736  Check if LDAP-Server supports a certain Control (OID in string format)
1737 ********************************************************************/
1738
1739 BOOL smbldap_has_control(LDAP *ld, const char *control)
1740 {
1741         const char *attrs[] = { "supportedControl", NULL };
1742         return smbldap_check_root_dse(ld, attrs, control);
1743 }
1744
1745 /*******************************************************************
1746  Check if LDAP-Server supports a certain Extension (OID in string format)
1747 ********************************************************************/
1748
1749 BOOL smbldap_has_extension(LDAP *ld, const char *extension)
1750 {
1751         const char *attrs[] = { "supportedExtension", NULL };
1752         return smbldap_check_root_dse(ld, attrs, extension);
1753 }
1754
1755 /*******************************************************************
1756  Check if LDAP-Server holds a given namingContext
1757 ********************************************************************/
1758
1759 BOOL smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1760 {
1761         const char *attrs[] = { "namingContexts", NULL };
1762         return smbldap_check_root_dse(ld, attrs, naming_context);
1763 }
1764
1765 BOOL smbldap_set_creds(struct smbldap_state *ldap_state, BOOL anon, const char *dn, const char *secret)
1766 {
1767         ldap_state->anonymous = anon;
1768
1769         /* free any previously set credential */
1770
1771         SAFE_FREE(ldap_state->bind_dn);
1772         if (ldap_state->bind_secret) {
1773                 /* make sure secrets are zeroed out of memory */
1774                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1775                 SAFE_FREE(ldap_state->bind_secret);
1776         }
1777
1778         if ( ! anon) {
1779                 ldap_state->bind_dn = SMB_STRDUP(dn);
1780                 ldap_state->bind_secret = SMB_STRDUP(secret);
1781         }
1782
1783         return True;
1784 }