source3/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 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 */
  24
  25 #include "includes.h"
  26 #include "smbldap.h"
  27
  28 #ifndef LDAP_OPT_SUCCESS
  29 #define LDAP_OPT_SUCCESS 0
  30 #endif
  31
  32 /* Try not to hit the up or down server forever */
  33
  34 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  35 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  36
  37 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  38
  39
  40 /* attributes used by Samba 2.2 */
  41
  42 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  43         { LDAP_ATTR_UID,                "uid"           },
  44         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  45         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  46         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  47         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  48         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  49         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  50         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  51         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  52         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  53         { LDAP_ATTR_CN,                 "cn"            },
  54         { LDAP_ATTR_SN,                 "sn"            },
  55         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  56         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  57         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  58         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  59         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  60         { LDAP_ATTR_DESC,               "description"   },
  61         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  62         { LDAP_ATTR_USER_RID,           "rid"           },
  63         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  64         { LDAP_ATTR_LMPW,               "lmPassword"    },
  65         { LDAP_ATTR_NTPW,               "ntPassword"    },
  66         { LDAP_ATTR_DOMAIN,             "domain"        },
  67         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  68         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  69         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  70         { LDAP_ATTR_LIST_END,           NULL            }
  71 };
  72
  73 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  74         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  75         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  76         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  77         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  78         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  79         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  80         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  81         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  82         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  83         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  84         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  85         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  86         { LDAP_ATTR_USER_RID,           "rid"           },
  87         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  88         { LDAP_ATTR_LMPW,               "lmPassword"    },
  89         { LDAP_ATTR_NTPW,               "ntPassword"    },
  90         { LDAP_ATTR_DOMAIN,             "domain"        },
  91         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  92         { LDAP_ATTR_LIST_END,           NULL            }
  93 };
  94
  95 /* attributes used by Samba 3.0's sambaSamAccount */
  96
  97 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  98         { LDAP_ATTR_UID,                "uid"                   },
  99         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 100         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 101         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
 102         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 103         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 104         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 105         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 106         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 107         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 108         { LDAP_ATTR_CN,                 "cn"                    },
 109         { LDAP_ATTR_SN,                 "sn"                    },
 110         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 111         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 112         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 113         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 114         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 115         { LDAP_ATTR_DESC,               "description"           },
 116         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 117         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 118         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 119         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 120         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 121         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 122         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 123         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 124         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 125         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 126         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 127         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 128         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 129         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 130         { LDAP_ATTR_LIST_END,           NULL                    }
 131 };
 132
 133 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 134         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 135         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 136         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 137         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 138         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 139         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 140         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 141         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 142         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 143         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 144         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 145         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 146         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 147         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 148         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 149         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 150         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 151         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 152         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 153         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 154         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 155         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 156         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 157         { LDAP_ATTR_LIST_END,           NULL                    }
 158 };
 159
 160 /* attributes used for allocating RIDs */
 161
 162 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 163         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 164         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 165         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 166         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 167         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 168         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 169         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 170         { LDAP_ATTR_LIST_END,           NULL                    },
 171 };
 172
 173 /* Samba 3.0 group mapping attributes */
 174
 175 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 176         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 177         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 178         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 179         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 180         { LDAP_ATTR_DESC,               "description"           },
 181         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 182         { LDAP_ATTR_CN,                 "cn"                    },
 183         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 184         { LDAP_ATTR_LIST_END,           NULL                    }
 185 };
 186
 187 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 188         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 189         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 190         { LDAP_ATTR_DESC,               "description"           },
 191         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 192         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 193         { LDAP_ATTR_LIST_END,           NULL                    }
 194 };
 195
 196 /* idmap_ldap sambaUnixIdPool */
 197
 198 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 199         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 200         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 201         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 202         { LDAP_ATTR_LIST_END,           NULL                    }
 203 };
 204
 205 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 206         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 207         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 208         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 209         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 210         { LDAP_ATTR_LIST_END,           NULL                    }
 211 };
 212
 213 /**********************************************************************
 214  perform a simple table lookup and return the attribute name
 215  **********************************************************************/
 216
 217  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 218 {
 219         int i = 0;
 220
 221         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 222                 if ( table[i].attrib == key )
 223                         return table[i].name;
 224                 i++;
 225         }
 226
 227         return NULL;
 228 }
 229
 230
 231 /**********************************************************************
 232  Return the list of attribute names from a mapping table
 233  **********************************************************************/
 234
 235  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 236 {
 237         const char **names;
 238         int i = 0;
 239
 240         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 241                 i++;
 242         i++;
 243
 244         names = TALLOC_ARRAY( mem_ctx, const char*, i );
 245         if ( !names ) {
 246                 DEBUG(0,("get_attr_list: out of memory\n"));
 247                 return NULL;
 248         }
 249
 250         i = 0;
 251         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 252                 names[i] = talloc_strdup( names, table[i].name );
 253                 i++;
 254         }
 255         names[i] = NULL;
 256
 257         return names;
 258 }
 259
 260 /*******************************************************************
 261  Search an attribute and return the first value found.
 262 ******************************************************************/
 263
 264  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 265                                     const char *attribute, char *value,
 266                                     int max_len)
 267 {
 268         char **values;
 269
 270         if ( !attribute )
 271                 return False;
 272
 273         value[0] = '\0';
 274
 275         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 276                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 277
 278                 return False;
 279         }
 280
 281         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 282                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 283                           attribute, values[0]));
 284                 ldap_value_free(values);
 285                 return False;
 286         }
 287
 288         ldap_value_free(values);
 289 #ifdef DEBUG_PASSWORDS
 290         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 291 #endif
 292         return True;
 293 }
 294
 295  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 296                                         const char *attribute,
 297                                         TALLOC_CTX *mem_ctx)
 298 {
 299         char **values;
 300         char *result;
 301
 302         if (attribute == NULL) {
 303                 return NULL;
 304         }
 305
 306         values = ldap_get_values(ldap_struct, entry, attribute);
 307
 308         if (values == NULL) {
 309                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 310                 return NULL;
 311         }
 312
 313         if (ldap_count_values(values) != 1) {
 314                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 315                            attribute, ldap_count_values(values)));
 316                 ldap_value_free(values);
 317                 return NULL;
 318         }
 319
 320         if (pull_utf8_talloc(mem_ctx, &result, values[0]) == (size_t)-1) {
 321                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 322                 ldap_value_free(values);
 323                 return NULL;
 324         }
 325
 326         ldap_value_free(values);
 327
 328 #ifdef DEBUG_PASSWORDS
 329         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 330                      attribute, result));
 331 #endif
 332         return result;
 333 }
 334
 335  static int ldapmsg_destructor(LDAPMessage **result) {
 336         ldap_msgfree(*result);
 337         return 0;
 338 }
 339
 340  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 341 {
 342         LDAPMessage **handle;
 343
 344         if (result == NULL) {
 345                 return;
 346         }
 347
 348         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 349         SMB_ASSERT(handle != NULL);
 350
 351         *handle = result;
 352         talloc_set_destructor(handle, ldapmsg_destructor);
 353 }
 354
 355  static int ldapmod_destructor(LDAPMod ***mod) {
 356         ldap_mods_free(*mod, True);
 357         return 0;
 358 }
 359
 360  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 361 {
 362         LDAPMod ***handle;
 363
 364         if (mod == NULL) {
 365                 return;
 366         }
 367
 368         handle = TALLOC_P(mem_ctx, LDAPMod **);
 369         SMB_ASSERT(handle != NULL);
 370
 371         *handle = mod;
 372         talloc_set_destructor(handle, ldapmod_destructor);
 373 }
 374
 375 /************************************************************************
 376  Routine to manage the LDAPMod structure array
 377  manage memory used by the array, by each struct, and values
 378  ***********************************************************************/
 379
 380  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 381 {
 382         LDAPMod **mods;
 383         int i;
 384         int j;
 385
 386         mods = *modlist;
 387
 388         /* sanity checks on the mod values */
 389
 390         if (attribute == NULL || *attribute == '\0') {
 391                 return;
 392         }
 393
 394 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 395            left here so other do not re-add similar code   --jerry */
 396         if (value == NULL || *value == '\0')
 397                 return;
 398 #endif
 399
 400         if (mods == NULL) {
 401                 mods = SMB_MALLOC_P(LDAPMod *);
 402                 if (mods == NULL) {
 403                         smb_panic("smbldap_set_mod: out of memory!");
 404                         /* notreached. */
 405                 }
 406                 mods[0] = NULL;
 407         }
 408
 409         for (i = 0; mods[i] != NULL; ++i) {
 410                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 411                         break;
 412         }
 413
 414         if (mods[i] == NULL) {
 415                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 416                 if (mods == NULL) {
 417                         smb_panic("smbldap_set_mod: out of memory!");
 418                         /* notreached. */
 419                 }
 420                 mods[i] = SMB_MALLOC_P(LDAPMod);
 421                 if (mods[i] == NULL) {
 422                         smb_panic("smbldap_set_mod: out of memory!");
 423                         /* notreached. */
 424                 }
 425                 mods[i]->mod_op = modop;
 426                 mods[i]->mod_values = NULL;
 427                 mods[i]->mod_type = SMB_STRDUP(attribute);
 428                 mods[i + 1] = NULL;
 429         }
 430
 431         if (value != NULL) {
 432                 char *utf8_value = NULL;
 433
 434                 j = 0;
 435                 if (mods[i]->mod_values != NULL) {
 436                         for (; mods[i]->mod_values[j] != NULL; j++);
 437                 }
 438                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 439
 440                 if (mods[i]->mod_values == NULL) {
 441                         smb_panic("smbldap_set_mod: out of memory!");
 442                         /* notreached. */
 443                 }
 444
 445                 if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) {
 446                         smb_panic("smbldap_set_mod: String conversion failure!");
 447                         /* notreached. */
 448                 }
 449
 450                 mods[i]->mod_values[j] = utf8_value;
 451
 452                 mods[i]->mod_values[j + 1] = NULL;
 453         }
 454         *modlist = mods;
 455 }
 456
 457 /**********************************************************************
 458   Set attribute to newval in LDAP, regardless of what value the
 459   attribute had in LDAP before.
 460 *********************************************************************/
 461
 462  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 463                       LDAPMod ***mods,
 464                       const char *attribute, const char *newval)
 465 {
 466         char oldval[2048]; /* current largest allowed value is mungeddial */
 467         bool existed;
 468
 469         if (attribute == NULL) {
 470                 /* This can actually happen for ldapsam_compat where we for
 471                  * example don't have a password history */
 472                 return;
 473         }
 474
 475         if (existing != NULL) {
 476                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 477         } else {
 478                 existed = False;
 479                 *oldval = '\0';
 480         }
 481
 482         /* all of our string attributes are case insensitive */
 483
 484         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 485
 486                 /* Believe it or not, but LDAP will deny a delete and
 487                    an add at the same time if the values are the
 488                    same... */
 489                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 490                 return;
 491         }
 492
 493         if (existed) {
 494                 /* There has been no value before, so don't delete it.
 495                  * Here's a possible race: We might end up with
 496                  * duplicate attributes */
 497                 /* By deleting exactly the value we found in the entry this
 498                  * should be race-free in the sense that the LDAP-Server will
 499                  * deny the complete operation if somebody changed the
 500                  * attribute behind our back. */
 501                 /* This will also allow modifying single valued attributes
 502                  * in Novell NDS. In NDS you have to first remove attribute and then
 503                  * you could add new value */
 504
 505                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 506                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 507         }
 508
 509         /* Regardless of the real operation (add or modify)
 510            we add the new value here. We rely on deleting
 511            the old value, should it exist. */
 512
 513         if ((newval != NULL) && (strlen(newval) > 0)) {
 514                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 515                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 516         }
 517 }
 518
 519 /**********************************************************************
 520  Some varients of the LDAP rebind code do not pass in the third 'arg'
 521  pointer to a void*, so we try and work around it by assuming that the
 522  value of the 'LDAP *' pointer is the same as the one we had passed in
 523  **********************************************************************/
 524
 525 struct smbldap_state_lookup {
 526         LDAP *ld;
 527         struct smbldap_state *smbldap_state;
 528         struct smbldap_state_lookup *prev, *next;
 529 };
 530
 531 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 532
 533 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 534 {
 535         struct smbldap_state_lookup *t;
 536
 537         for (t = smbldap_state_lookup_list; t; t = t->next) {
 538                 if (t->ld == ld) {
 539                         return t->smbldap_state;
 540                 }
 541         }
 542         return NULL;
 543 }
 544
 545 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 546 {
 547         struct smbldap_state_lookup *t;
 548
 549         for (t = smbldap_state_lookup_list; t; t = t->next) {
 550                 if (t->smbldap_state == smbldap_state) {
 551                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 552                         SAFE_FREE(t);
 553                         return;
 554                 }
 555         }
 556 }
 557
 558 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 559 {
 560         struct smbldap_state *tmp_ldap_state;
 561         struct smbldap_state_lookup *t;
 562
 563         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 564                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 565                 return;
 566         }
 567
 568         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 569         ZERO_STRUCTP(t);
 570
 571         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 572         t->ld = ld;
 573         t->smbldap_state = smbldap_state;
 574 }
 575
 576 /********************************************************************
 577  start TLS on an existing LDAP connection
 578 *******************************************************************/
 579
 580 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 581 {
 582         int rc;
 583
 584         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 585                 return LDAP_SUCCESS;
 586         }
 587
 588 #ifdef LDAP_OPT_X_TLS
 589         if (version != LDAP_VERSION3) {
 590                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 591                 return LDAP_OPERATIONS_ERROR;
 592         }
 593
 594         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 595                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 596                          ldap_err2string(rc)));
 597                 return rc;
 598         }
 599
 600         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 601         return LDAP_SUCCESS;
 602 #else
 603         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 604         return LDAP_OPERATIONS_ERROR;
 605 #endif
 606 }
 607
 608 /********************************************************************
 609  setup a connection to the LDAP server based on a uri
 610 *******************************************************************/
 611
 612 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 613 {
 614         int rc;
 615
 616         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 617
 618 #ifdef HAVE_LDAP_INITIALIZE
 619
 620         rc = ldap_initialize(ldap_struct, uri);
 621         if (rc) {
 622                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 623         }
 624
 625         return rc;
 626 #else
 627
 628         /* Parse the string manually */
 629
 630         {
 631                 int port = 0;
 632                 fstring protocol;
 633                 fstring host;
 634                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 635
 636
 637                 /* skip leading "URL:" (if any) */
 638                 if ( strnequal( uri, "URL:", 4 ) ) {
 639                         uri += 4;
 640                 }
 641
 642                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 643
 644                 if (port == 0) {
 645                         if (strequal(protocol, "ldap")) {
 646                                 port = LDAP_PORT;
 647                         } else if (strequal(protocol, "ldaps")) {
 648                                 port = LDAPS_PORT;
 649                         } else {
 650                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 651                         }
 652                 }
 653
 654                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 655                         DEBUG(0, ("ldap_init failed !\n"));
 656                         return LDAP_OPERATIONS_ERROR;
 657                 }
 658
 659                 if (strequal(protocol, "ldaps")) {
 660 #ifdef LDAP_OPT_X_TLS
 661                         int tls = LDAP_OPT_X_TLS_HARD;
 662                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 663                         {
 664                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 665                         }
 666
 667                         DEBUG(3,("LDAPS option set...!\n"));
 668 #else
 669                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 670                         return LDAP_OPERATIONS_ERROR;
 671 #endif /* LDAP_OPT_X_TLS */
 672                 }
 673
 674         }
 675 #endif /* HAVE_LDAP_INITIALIZE */
 676         return LDAP_SUCCESS;
 677 }
 678
 679 /********************************************************************
 680  try to upgrade to Version 3 LDAP if not already, in either case return current
 681  version
 682  *******************************************************************/
 683
 684 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 685 {
 686         int version;
 687         int rc;
 688
 689         /* assume the worst */
 690         *new_version = LDAP_VERSION2;
 691
 692         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 693         if (rc) {
 694                 return rc;
 695         }
 696
 697         if (version == LDAP_VERSION3) {
 698                 *new_version = LDAP_VERSION3;
 699                 return LDAP_SUCCESS;
 700         }
 701
 702         /* try upgrade */
 703         version = LDAP_VERSION3;
 704         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 705         if (rc) {
 706                 return rc;
 707         }
 708
 709         *new_version = LDAP_VERSION3;
 710         return LDAP_SUCCESS;
 711 }
 712
 713 /*******************************************************************
 714  open a connection to the ldap server (just until the bind)
 715  ******************************************************************/
 716
 717 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 718 {
 719         int rc, version;
 720
 721         rc = smb_ldap_setup_conn(ldap_struct, uri);
 722         if (rc) {
 723                 return rc;
 724         }
 725
 726         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 727         if (rc) {
 728                 return rc;
 729         }
 730
 731         rc = smb_ldap_start_tls(*ldap_struct, version);
 732         if (rc) {
 733                 return rc;
 734         }
 735
 736         return LDAP_SUCCESS;
 737 }
 738
 739 /*******************************************************************
 740  open a connection to the ldap server.
 741 ******************************************************************/
 742 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 743
 744 {
 745         int rc = LDAP_SUCCESS;
 746         int version;
 747         LDAP **ldap_struct = &ldap_state->ldap_struct;
 748
 749         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 750         if (rc) {
 751                 return rc;
 752         }
 753
 754         /* Store the LDAP pointer in a lookup list */
 755
 756         smbldap_store_state(*ldap_struct, ldap_state);
 757
 758         /* Upgrade to LDAPv3 if possible */
 759
 760         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 761         if (rc) {
 762                 return rc;
 763         }
 764
 765         /* Start TLS if required */
 766
 767         rc = smb_ldap_start_tls(*ldap_struct, version);
 768         if (rc) {
 769                 return rc;
 770         }
 771
 772         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 773         return rc;
 774 }
 775
 776 /*******************************************************************
 777  a rebind function for authenticated referrals
 778  This version takes a void* that we can shove useful stuff in :-)
 779 ******************************************************************/
 780 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 781 #else
 782 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 783                                    int *methodp, int freeit, void *arg)
 784 {
 785         struct smbldap_state *ldap_state = arg;
 786
 787         /** @TODO Should we be doing something to check what servers we rebind to?
 788             Could we get a referral to a machine that we don't want to give our
 789             username and password to? */
 790
 791         if (freeit) {
 792                 SAFE_FREE(*whop);
 793                 if (*credp) {
 794                         memset(*credp, '\0', strlen(*credp));
 795                 }
 796                 SAFE_FREE(*credp);
 797         } else {
 798                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 799                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 800
 801                 if (ldap_state->anonymous) {
 802                         *whop = NULL;
 803                         *credp = NULL;
 804                 } else {
 805                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 806                         if (!*whop) {
 807                                 return LDAP_NO_MEMORY;
 808                         }
 809                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 810                         if (!*credp) {
 811                                 SAFE_FREE(*whop);
 812                                 return LDAP_NO_MEMORY;
 813                         }
 814                 }
 815                 *methodp = LDAP_AUTH_SIMPLE;
 816         }
 817
 818         GetTimeOfDay(&ldap_state->last_rebind);
 819
 820         return 0;
 821 }
 822 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 823
 824 /*******************************************************************
 825  a rebind function for authenticated referrals
 826  This version takes a void* that we can shove useful stuff in :-)
 827  and actually does the connection.
 828 ******************************************************************/
 829 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 830 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 831                                           LDAP_CONST char *url,
 832                                           ber_tag_t request,
 833                                           ber_int_t msgid, void *arg)
 834 {
 835         struct smbldap_state *ldap_state =
 836                 (struct smbldap_state *)arg;
 837         int rc;
 838         int version;
 839
 840         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
 841                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 842
 843         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
 844          * itself) before rebinding to another LDAP server to avoid to expose
 845          * our credentials. At least *try* to secure the connection - Guenther */
 846
 847         smb_ldap_upgrade_conn(ldap_struct, &version);
 848         smb_ldap_start_tls(ldap_struct, version);
 849
 850         /** @TODO Should we be doing something to check what servers we rebind to?
 851             Could we get a referral to a machine that we don't want to give our
 852             username and password to? */
 853
 854         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 855
 856         /* only set the last rebind timestamp when we did rebind after a
 857          * non-read LDAP operation. That way we avoid the replication sleep
 858          * after a simple redirected search operation - Guenther */
 859
 860         switch (request) {
 861
 862                 case LDAP_REQ_MODIFY:
 863                 case LDAP_REQ_ADD:
 864                 case LDAP_REQ_DELETE:
 865                 case LDAP_REQ_MODDN:
 866                 case LDAP_REQ_EXTENDED:
 867                         DEBUG(10,("rebindproc_connect_with_state: "
 868                                 "setting last_rebind timestamp "
 869                                 "(req: 0x%02x)\n", (unsigned int)request));
 870                         GetTimeOfDay(&ldap_state->last_rebind);
 871                         break;
 872                 default:
 873                         ZERO_STRUCT(ldap_state->last_rebind);
 874                         break;
 875         }
 876
 877         return rc;
 878 }
 879 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 880
 881 /*******************************************************************
 882  Add a rebind function for authenticated referrals
 883 ******************************************************************/
 884 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 885 #else
 886 # if LDAP_SET_REBIND_PROC_ARGS == 2
 887 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 888                        int *method, int freeit )
 889 {
 890         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 891
 892         return rebindproc_with_state(ldap_struct, whop, credp,
 893                                      method, freeit, ldap_state);
 894
 895 }
 896 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 897 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 898
 899 /*******************************************************************
 900  a rebind function for authenticated referrals
 901  this also does the connection, but no void*.
 902 ******************************************************************/
 903 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 904 # if LDAP_SET_REBIND_PROC_ARGS == 2
 905 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 906                                ber_int_t msgid)
 907 {
 908         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 909
 910         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 911                                              ldap_state);
 912 }
 913 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 914 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 915
 916 /*******************************************************************
 917  connect to the ldap server under system privilege.
 918 ******************************************************************/
 919 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 920 {
 921         int rc;
 922         int version;
 923
 924         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
 925
 926                 /* get the default dn and password only if they are not set already */
 927                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
 928                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 929                         return LDAP_INVALID_CREDENTIALS;
 930                 }
 931         }
 932
 933         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 934            (OpenLDAP) doesnt' seem to support it */
 935
 936         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 937                   ldap_state->uri, ldap_state->bind_dn));
 938
 939 #ifdef HAVE_LDAP_SET_REBIND_PROC
 940 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 941 # if LDAP_SET_REBIND_PROC_ARGS == 2
 942         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 943 # endif
 944 # if LDAP_SET_REBIND_PROC_ARGS == 3
 945         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 946 # endif
 947 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 948 # if LDAP_SET_REBIND_PROC_ARGS == 2
 949         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 950 # endif
 951 # if LDAP_SET_REBIND_PROC_ARGS == 3
 952         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 953 # endif
 954 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 955 #endif
 956
 957         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 958
 959         if (rc != LDAP_SUCCESS) {
 960                 char *ld_error = NULL;
 961                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 962                                 &ld_error);
 963                 DEBUG(ldap_state->num_failures ? 2 : 0,
 964                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
 965                                ldap_state->uri,
 966                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
 967                                ldap_err2string(rc),
 968                                ld_error ? ld_error : "(unknown)"));
 969                 SAFE_FREE(ld_error);
 970                 ldap_state->num_failures++;
 971                 return rc;
 972         }
 973
 974         ldap_state->num_failures = 0;
 975         ldap_state->paged_results = False;
 976
 977         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 978
 979         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
 980                 ldap_state->paged_results = True;
 981         }
 982
 983         DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n"));
 984         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
 985                 ldap_state->paged_results ? "does" : "does not"));
 986         return rc;
 987 }
 988
 989 static void smbldap_idle_fn(struct event_context *event_ctx,
 990                             struct timed_event *te,
 991                             const struct timeval *now,
 992                             void *private_data);
 993
 994 /**********************************************************************
 995  Connect to LDAP server (called before every ldap operation)
 996 *********************************************************************/
 997 static int smbldap_open(struct smbldap_state *ldap_state)
 998 {
 999         int rc, opt_rc;
1000         bool reopen = False;
1001         SMB_ASSERT(ldap_state);
1002
1003 #ifndef NO_LDAP_SECURITY
1004         if (geteuid() != 0) {
1005                 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
1006                 return  LDAP_INSUFFICIENT_ACCESS;
1007         }
1008 #endif
1009
1010         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1011
1012 #ifdef HAVE_UNIXSOCKET
1013                 struct sockaddr_un addr;
1014 #else
1015                 struct sockaddr addr;
1016 #endif
1017                 socklen_t len = sizeof(addr);
1018                 int sd;
1019
1020                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1021                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1022                         reopen = True;
1023
1024 #ifdef HAVE_UNIXSOCKET
1025                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1026                         reopen = True;
1027 #endif
1028                 if (reopen) {
1029                         /* the other end has died. reopen. */
1030                         ldap_unbind(ldap_state->ldap_struct);
1031                         ldap_state->ldap_struct = NULL;
1032                         ldap_state->last_ping = (time_t)0;
1033                 } else {
1034                         ldap_state->last_ping = time(NULL);
1035                 }
1036         }
1037
1038         if (ldap_state->ldap_struct != NULL) {
1039                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1040                 return LDAP_SUCCESS;
1041         }
1042
1043         if ((rc = smbldap_open_connection(ldap_state))) {
1044                 return rc;
1045         }
1046
1047         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1048                 ldap_unbind(ldap_state->ldap_struct);
1049                 ldap_state->ldap_struct = NULL;
1050                 return rc;
1051         }
1052
1053
1054         ldap_state->last_ping = time(NULL);
1055         ldap_state->pid = sys_getpid();
1056
1057         TALLOC_FREE(ldap_state->idle_event);
1058
1059         if (ldap_state->event_context != NULL) {
1060                 ldap_state->idle_event = event_add_timed(
1061                         ldap_state->event_context, NULL,
1062                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1063                         "smbldap_idle_fn", smbldap_idle_fn, ldap_state);
1064         }
1065
1066         DEBUG(4,("The LDAP server is succesfully connected\n"));
1067
1068         return LDAP_SUCCESS;
1069 }
1070
1071 /**********************************************************************
1072 Disconnect from LDAP server
1073 *********************************************************************/
1074 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1075 {
1076         if (!ldap_state)
1077                 return NT_STATUS_INVALID_PARAMETER;
1078
1079         if (ldap_state->ldap_struct != NULL) {
1080                 ldap_unbind(ldap_state->ldap_struct);
1081                 ldap_state->ldap_struct = NULL;
1082         }
1083
1084         smbldap_delete_state(ldap_state);
1085
1086         DEBUG(5,("The connection to the LDAP server was closed\n"));
1087         /* maybe free the results here --metze */
1088
1089         return NT_STATUS_OK;
1090 }
1091
1092 static bool got_alarm;
1093
1094 static void (*old_handler)(int);
1095
1096 static void gotalarm_sig(int dummy)
1097 {
1098         got_alarm = True;
1099 }
1100
1101 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1102                             int *attempts, time_t endtime)
1103 {
1104         time_t now = time(NULL);
1105         int open_rc = LDAP_SERVER_DOWN;
1106
1107         if (*rc != LDAP_SERVER_DOWN)
1108                 goto no_next;
1109
1110         if (now >= endtime) {
1111                 smbldap_close(ldap_state);
1112                 *rc = LDAP_TIMEOUT;
1113                 goto no_next;
1114         }
1115
1116         if (*attempts == 0) {
1117                 got_alarm = False;
1118                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1119                 alarm(endtime - now);
1120
1121                 if (ldap_state->pid != sys_getpid())
1122                         smbldap_close(ldap_state);
1123         }
1124
1125         while (1) {
1126
1127                 if (*attempts != 0)
1128                         smb_msleep(1000);
1129
1130                 *attempts += 1;
1131
1132                 open_rc = smbldap_open(ldap_state);
1133
1134                 if (open_rc == LDAP_SUCCESS) {
1135                         ldap_state->last_use = now;
1136                         return True;
1137                 }
1138
1139                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1140                         /* The fact that we are non-root or any other
1141                          * access-denied condition will not change in the next
1142                          * round of trying */
1143                         *rc = open_rc;
1144                         break;
1145                 }
1146
1147                 if (got_alarm) {
1148                         *rc = LDAP_TIMEOUT;
1149                         break;
1150                 }
1151
1152                 if (open_rc != LDAP_SUCCESS) {
1153                         DEBUG(1, ("Connection to LDAP server failed for the "
1154                                   "%d try!\n", *attempts));
1155                 }
1156         }
1157
1158  no_next:
1159         CatchSignal(SIGALRM, old_handler);
1160         alarm(0);
1161         ldap_state->last_use = now;
1162         return False;
1163 }
1164
1165 /*********************************************************************
1166  ********************************************************************/
1167
1168 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1169                               const char *base, int scope, const char *filter,
1170                               const char *attrs[], int attrsonly,
1171                               LDAPControl **sctrls, LDAPControl **cctrls,
1172                               int sizelimit, LDAPMessage **res)
1173 {
1174         int             rc = LDAP_SERVER_DOWN;
1175         int             attempts = 0;
1176         char           *utf8_filter;
1177         time_t          endtime = time(NULL)+lp_ldap_timeout();
1178         struct          timeval timeout;
1179
1180         SMB_ASSERT(ldap_state);
1181
1182         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1183                  "scope => [%d]\n", base, filter, scope));
1184
1185         if (ldap_state->last_rebind.tv_sec > 0) {
1186                 struct timeval  tval;
1187                 SMB_BIG_INT     tdiff = 0;
1188                 int             sleep_time = 0;
1189
1190                 ZERO_STRUCT(tval);
1191                 GetTimeOfDay(&tval);
1192
1193                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1194                 tdiff /= 1000; /* Convert to milliseconds. */
1195
1196                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1197                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1198
1199                 if (sleep_time > 0) {
1200                         /* we wait for the LDAP replication */
1201                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1202                                  "for LDAP replication.\n",sleep_time));
1203                         smb_msleep(sleep_time);
1204                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1205                 }
1206                 ZERO_STRUCT(ldap_state->last_rebind);
1207         }
1208
1209         if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
1210                 return LDAP_NO_MEMORY;
1211         }
1212
1213         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1214         timeout.tv_sec = lp_ldap_timeout();
1215         timeout.tv_usec = 0;
1216
1217         /* Setup alarm timeout.... Do we need both of these ? JRA.
1218          * Yes, I think we do need both of these. The server timeout only
1219          * covers the case where the server's operation takes too long. It
1220          * does not cover the case where the request hangs on its way to the
1221          * server. The server side timeout is not strictly necessary, it's
1222          * just a bit more kind to the server. VL. */
1223
1224         got_alarm = 0;
1225         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1226         alarm(lp_ldap_timeout());
1227         /* End setup timeout. */
1228
1229         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1230                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1231                                        utf8_filter,
1232                                        CONST_DISCARD(char **, attrs),
1233                                        attrsonly, sctrls, cctrls, &timeout,
1234                                        sizelimit, res);
1235                 if (rc != LDAP_SUCCESS) {
1236                         char *ld_error = NULL;
1237                         int ld_errno;
1238
1239                         ldap_get_option(ldap_state->ldap_struct,
1240                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1241
1242                         ldap_get_option(ldap_state->ldap_struct,
1243                                         LDAP_OPT_ERROR_STRING, &ld_error);
1244                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1245                                    "(%s)\n", base, ld_errno,
1246                                    ldap_err2string(rc),
1247                                    ld_error ? ld_error : "unknown"));
1248                         SAFE_FREE(ld_error);
1249
1250                         if (ld_errno == LDAP_SERVER_DOWN) {
1251                                 ldap_unbind(ldap_state->ldap_struct);
1252                                 ldap_state->ldap_struct = NULL;
1253                         }
1254                 }
1255         }
1256
1257         SAFE_FREE(utf8_filter);
1258
1259         /* Teardown timeout. */
1260         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1261         alarm(0);
1262
1263         if (got_alarm != 0)
1264                 return LDAP_TIMELIMIT_EXCEEDED;
1265
1266         return rc;
1267 }
1268
1269 int smbldap_search(struct smbldap_state *ldap_state,
1270                    const char *base, int scope, const char *filter,
1271                    const char *attrs[], int attrsonly,
1272                    LDAPMessage **res)
1273 {
1274         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1275                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1276 }
1277
1278 int smbldap_search_paged(struct smbldap_state *ldap_state,
1279                          const char *base, int scope, const char *filter,
1280                          const char **attrs, int attrsonly, int pagesize,
1281                          LDAPMessage **res, void **cookie)
1282 {
1283         LDAPControl     pr;
1284         LDAPControl     **rcontrols;
1285         LDAPControl     *controls[2] = { NULL, NULL};
1286         BerElement      *cookie_be = NULL;
1287         struct berval   *cookie_bv = NULL;
1288         int             tmp = 0, i, rc;
1289         bool            critical = True;
1290
1291         *res = NULL;
1292
1293         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1294                  "scope => [%d], pagesize => [%d]\n",
1295                  base, filter, scope, pagesize));
1296
1297         cookie_be = ber_alloc_t(LBER_USE_DER);
1298         if (cookie_be == NULL) {
1299                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1300                          "NULL\n"));
1301                 return LDAP_NO_MEMORY;
1302         }
1303
1304         /* construct cookie */
1305         if (*cookie != NULL) {
1306                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1307                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1308                 *cookie = NULL;
1309         } else {
1310                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1311         }
1312         ber_flatten(cookie_be, &cookie_bv);
1313
1314         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1315         pr.ldctl_iscritical = (char) critical;
1316         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1317         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1318
1319         controls[0] = &pr;
1320         controls[1] = NULL;
1321
1322         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1323                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1324
1325         ber_free(cookie_be, 1);
1326         ber_bvfree(cookie_bv);
1327
1328         if (rc != 0) {
1329                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1330                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1331                 goto done;
1332         }
1333
1334         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1335
1336         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1337                                NULL, NULL, &rcontrols,  0);
1338         if (rc != 0) {
1339                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1340                          "with [%s]\n", ldap_err2string(rc)));
1341                 goto done;
1342         }
1343
1344         if (rcontrols == NULL)
1345                 goto done;
1346
1347         for (i=0; rcontrols[i]; i++) {
1348
1349                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1350                         continue;
1351
1352                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1353                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1354                 /* the berval is the cookie, but must be freed when it is all
1355                    done */
1356                 if (cookie_bv->bv_len)
1357                         *cookie=ber_bvdup(cookie_bv);
1358                 else
1359                         *cookie=NULL;
1360                 ber_bvfree(cookie_bv);
1361                 ber_free(cookie_be, 1);
1362                 break;
1363         }
1364         ldap_controls_free(rcontrols);
1365 done:
1366         return rc;
1367 }
1368
1369 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1370 {
1371         int             rc = LDAP_SERVER_DOWN;
1372         int             attempts = 0;
1373         char           *utf8_dn;
1374         time_t          endtime = time(NULL)+lp_ldap_timeout();
1375
1376         SMB_ASSERT(ldap_state);
1377
1378         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1379
1380         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1381                 return LDAP_NO_MEMORY;
1382         }
1383
1384         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1385                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1386                 if (rc != LDAP_SUCCESS) {
1387                         char *ld_error = NULL;
1388                         int ld_errno;
1389
1390                         ldap_get_option(ldap_state->ldap_struct,
1391                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1392
1393                         ldap_get_option(ldap_state->ldap_struct,
1394                                         LDAP_OPT_ERROR_STRING, &ld_error);
1395                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1396                                    "(%s)\n", dn, ld_errno,
1397                                    ldap_err2string(rc),
1398                                    ld_error ? ld_error : "unknown"));
1399                         SAFE_FREE(ld_error);
1400
1401                         if (ld_errno == LDAP_SERVER_DOWN) {
1402                                 ldap_unbind(ldap_state->ldap_struct);
1403                                 ldap_state->ldap_struct = NULL;
1404                         }
1405                 }
1406         }
1407
1408         SAFE_FREE(utf8_dn);
1409         return rc;
1410 }
1411
1412 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1413 {
1414         int             rc = LDAP_SERVER_DOWN;
1415         int             attempts = 0;
1416         char           *utf8_dn;
1417         time_t          endtime = time(NULL)+lp_ldap_timeout();
1418
1419         SMB_ASSERT(ldap_state);
1420
1421         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1422
1423         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1424                 return LDAP_NO_MEMORY;
1425         }
1426
1427         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1428                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1429                 if (rc != LDAP_SUCCESS) {
1430                         char *ld_error = NULL;
1431                         int ld_errno;
1432
1433                         ldap_get_option(ldap_state->ldap_struct,
1434                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1435
1436                         ldap_get_option(ldap_state->ldap_struct,
1437                                         LDAP_OPT_ERROR_STRING, &ld_error);
1438                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1439                                    "(%s)\n", dn, ld_errno,
1440                                    ldap_err2string(rc),
1441                                    ld_error ? ld_error : "unknown"));
1442                         SAFE_FREE(ld_error);
1443
1444                         if (ld_errno == LDAP_SERVER_DOWN) {
1445                                 ldap_unbind(ldap_state->ldap_struct);
1446                                 ldap_state->ldap_struct = NULL;
1447                         }
1448                 }
1449         }
1450
1451         SAFE_FREE(utf8_dn);
1452         return rc;
1453 }
1454
1455 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1456 {
1457         int             rc = LDAP_SERVER_DOWN;
1458         int             attempts = 0;
1459         char           *utf8_dn;
1460         time_t          endtime = time(NULL)+lp_ldap_timeout();
1461
1462         SMB_ASSERT(ldap_state);
1463
1464         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1465
1466         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1467                 return LDAP_NO_MEMORY;
1468         }
1469
1470         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1471                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1472                 if (rc != LDAP_SUCCESS) {
1473                         char *ld_error = NULL;
1474                         int ld_errno;
1475
1476                         ldap_get_option(ldap_state->ldap_struct,
1477                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1478
1479                         ldap_get_option(ldap_state->ldap_struct,
1480                                         LDAP_OPT_ERROR_STRING, &ld_error);
1481                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1482                                    "(%s)\n", dn, ld_errno,
1483                                    ldap_err2string(rc),
1484                                    ld_error ? ld_error : "unknown"));
1485                         SAFE_FREE(ld_error);
1486
1487                         if (ld_errno == LDAP_SERVER_DOWN) {
1488                                 ldap_unbind(ldap_state->ldap_struct);
1489                                 ldap_state->ldap_struct = NULL;
1490                         }
1491                 }
1492         }
1493
1494         SAFE_FREE(utf8_dn);
1495         return rc;
1496 }
1497
1498 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1499                                LDAP_CONST char *reqoid, struct berval *reqdata,
1500                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1501                                char **retoidp, struct berval **retdatap)
1502 {
1503         int             rc = LDAP_SERVER_DOWN;
1504         int             attempts = 0;
1505         time_t          endtime = time(NULL)+lp_ldap_timeout();
1506
1507         if (!ldap_state)
1508                 return (-1);
1509
1510         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1511                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1512                                                reqdata, serverctrls,
1513                                                clientctrls, retoidp, retdatap);
1514                 if (rc != LDAP_SUCCESS) {
1515                         char *ld_error = NULL;
1516                         int ld_errno;
1517
1518                         ldap_get_option(ldap_state->ldap_struct,
1519                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1520
1521                         ldap_get_option(ldap_state->ldap_struct,
1522                                         LDAP_OPT_ERROR_STRING, &ld_error);
1523                         DEBUG(10, ("Extended operation failed with error: "
1524                                    "%d (%s) (%s)\n", ld_errno,
1525                                    ldap_err2string(rc),
1526                                    ld_error ? ld_error : "unknown"));
1527                         SAFE_FREE(ld_error);
1528
1529                         if (ld_errno == LDAP_SERVER_DOWN) {
1530                                 ldap_unbind(ldap_state->ldap_struct);
1531                                 ldap_state->ldap_struct = NULL;
1532                         }
1533                 }
1534         }
1535
1536         return rc;
1537 }
1538
1539 /*******************************************************************
1540  run the search by name.
1541 ******************************************************************/
1542 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1543                            const char *filter, const char **search_attr,
1544                            LDAPMessage ** result)
1545 {
1546         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1547                               filter, search_attr, 0, result);
1548 }
1549
1550 static void smbldap_idle_fn(struct event_context *event_ctx,
1551                             struct timed_event *te,
1552                             const struct timeval *now,
1553                             void *private_data)
1554 {
1555         struct smbldap_state *state = (struct smbldap_state *)private_data;
1556
1557         TALLOC_FREE(state->idle_event);
1558
1559         if (state->ldap_struct == NULL) {
1560                 DEBUG(10,("ldap connection not connected...\n"));
1561                 return;
1562         }
1563
1564         if ((state->last_use+SMBLDAP_IDLE_TIME) > now->tv_sec) {
1565                 DEBUG(10,("ldap connection not idle...\n"));
1566
1567                 state->idle_event = event_add_timed(
1568                         event_ctx, NULL,
1569                         timeval_add(now, SMBLDAP_IDLE_TIME, 0),
1570                         "smbldap_idle_fn", smbldap_idle_fn,
1571                         private_data);
1572                 return;
1573         }
1574
1575         DEBUG(7,("ldap connection idle...closing connection\n"));
1576         smbldap_close(state);
1577 }
1578
1579 /**********************************************************************
1580  Housekeeping
1581  *********************************************************************/
1582
1583 void smbldap_free_struct(struct smbldap_state **ldap_state)
1584 {
1585         smbldap_close(*ldap_state);
1586
1587         if ((*ldap_state)->bind_secret) {
1588                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1589         }
1590
1591         SAFE_FREE((*ldap_state)->bind_dn);
1592         SAFE_FREE((*ldap_state)->bind_secret);
1593
1594         TALLOC_FREE((*ldap_state)->idle_event);
1595
1596         *ldap_state = NULL;
1597
1598         /* No need to free any further, as it is talloc()ed */
1599 }
1600
1601
1602 /**********************************************************************
1603  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1604  *********************************************************************/
1605
1606 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1607                       const char *location,
1608                       struct smbldap_state **smbldap_state)
1609 {
1610         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1611         if (!*smbldap_state) {
1612                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1613                 return NT_STATUS_NO_MEMORY;
1614         }
1615
1616         if (location) {
1617                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1618         } else {
1619                 (*smbldap_state)->uri = "ldap://localhost";
1620         }
1621
1622         (*smbldap_state)->event_context = event_ctx;
1623
1624         return NT_STATUS_OK;
1625 }
1626
1627 /*******************************************************************
1628  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1629 ********************************************************************/
1630 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1631 {
1632         char *utf8_dn, *unix_dn;
1633
1634         utf8_dn = ldap_get_dn(ld, entry);
1635         if (!utf8_dn) {
1636                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1637                 return NULL;
1638         }
1639         if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
1640                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
1641                 return NULL;
1642         }
1643         ldap_memfree(utf8_dn);
1644         return unix_dn;
1645 }
1646
1647  const char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1648                                LDAPMessage *entry)
1649 {
1650         char *utf8_dn, *unix_dn;
1651
1652         utf8_dn = ldap_get_dn(ld, entry);
1653         if (!utf8_dn) {
1654                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1655                 return NULL;
1656         }
1657         if (pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn) == (size_t)-1) {
1658                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1659                            "[%s]\n", utf8_dn));
1660                 return NULL;
1661         }
1662         ldap_memfree(utf8_dn);
1663         return unix_dn;
1664 }
1665
1666 /*******************************************************************
1667  Check if root-dse has a certain Control or Extension
1668 ********************************************************************/
1669
1670 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1671 {
1672         LDAPMessage *msg = NULL;
1673         LDAPMessage *entry = NULL;
1674         char **values = NULL;
1675         int rc, num_result, num_values, i;
1676         bool result = False;
1677
1678         if (!attrs[0]) {
1679                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1680                 return False;
1681         }
1682
1683         if (!strequal(attrs[0], "supportedExtension") &&
1684             !strequal(attrs[0], "supportedControl") &&
1685             !strequal(attrs[0], "namingContexts")) {
1686                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1687                 return False;
1688         }
1689
1690         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1691                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1692
1693         if (rc != LDAP_SUCCESS) {
1694                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1695                 return False;
1696         }
1697
1698         num_result = ldap_count_entries(ld, msg);
1699
1700         if (num_result != 1) {
1701                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1702                 goto done;
1703         }
1704
1705         entry = ldap_first_entry(ld, msg);
1706
1707         if (entry == NULL) {
1708                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1709                 goto done;
1710         }
1711
1712         values = ldap_get_values(ld, entry, attrs[0]);
1713
1714         if (values == NULL) {
1715                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1716                 goto done;
1717         }
1718
1719         num_values = ldap_count_values(values);
1720
1721         if (num_values == 0) {
1722                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1723                 goto done;
1724         }
1725
1726         for (i=0; i<num_values; i++) {
1727                 if (strcmp(values[i], value) == 0)
1728                         result = True;
1729         }
1730
1731
1732  done:
1733         if (values != NULL)
1734                 ldap_value_free(values);
1735         if (msg != NULL)
1736                 ldap_msgfree(msg);
1737
1738         return result;
1739
1740 }
1741
1742 /*******************************************************************
1743  Check if LDAP-Server supports a certain Control (OID in string format)
1744 ********************************************************************/
1745
1746 bool smbldap_has_control(LDAP *ld, const char *control)
1747 {
1748         const char *attrs[] = { "supportedControl", NULL };
1749         return smbldap_check_root_dse(ld, attrs, control);
1750 }
1751
1752 /*******************************************************************
1753  Check if LDAP-Server supports a certain Extension (OID in string format)
1754 ********************************************************************/
1755
1756 bool smbldap_has_extension(LDAP *ld, const char *extension)
1757 {
1758         const char *attrs[] = { "supportedExtension", NULL };
1759         return smbldap_check_root_dse(ld, attrs, extension);
1760 }
1761
1762 /*******************************************************************
1763  Check if LDAP-Server holds a given namingContext
1764 ********************************************************************/
1765
1766 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1767 {
1768         const char *attrs[] = { "namingContexts", NULL };
1769         return smbldap_check_root_dse(ld, attrs, naming_context);
1770 }
1771
1772 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1773 {
1774         ldap_state->anonymous = anon;
1775
1776         /* free any previously set credential */
1777
1778         SAFE_FREE(ldap_state->bind_dn);
1779         if (ldap_state->bind_secret) {
1780                 /* make sure secrets are zeroed out of memory */
1781                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1782                 SAFE_FREE(ldap_state->bind_secret);
1783         }
1784
1785         if ( ! anon) {
1786                 ldap_state->bind_dn = SMB_STRDUP(dn);
1787                 ldap_state->bind_secret = SMB_STRDUP(secret);
1788         }
1789
1790         return True;
1791 }