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         size_t converted_size;
 302
 303         if (attribute == NULL) {
 304                 return NULL;
 305         }
 306
 307         values = ldap_get_values(ldap_struct, entry, attribute);
 308
 309         if (values == NULL) {
 310                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 311                 return NULL;
 312         }
 313
 314         if (ldap_count_values(values) != 1) {
 315                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 316                            attribute, ldap_count_values(values)));
 317                 ldap_value_free(values);
 318                 return NULL;
 319         }
 320
 321         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 322                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 323                 ldap_value_free(values);
 324                 return NULL;
 325         }
 326
 327         ldap_value_free(values);
 328
 329 #ifdef DEBUG_PASSWORDS
 330         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 331                      attribute, result));
 332 #endif
 333         return result;
 334 }
 335
 336  static int ldapmsg_destructor(LDAPMessage **result) {
 337         ldap_msgfree(*result);
 338         return 0;
 339 }
 340
 341  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 342 {
 343         LDAPMessage **handle;
 344
 345         if (result == NULL) {
 346                 return;
 347         }
 348
 349         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 350         SMB_ASSERT(handle != NULL);
 351
 352         *handle = result;
 353         talloc_set_destructor(handle, ldapmsg_destructor);
 354 }
 355
 356  static int ldapmod_destructor(LDAPMod ***mod) {
 357         ldap_mods_free(*mod, True);
 358         return 0;
 359 }
 360
 361  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 362 {
 363         LDAPMod ***handle;
 364
 365         if (mod == NULL) {
 366                 return;
 367         }
 368
 369         handle = TALLOC_P(mem_ctx, LDAPMod **);
 370         SMB_ASSERT(handle != NULL);
 371
 372         *handle = mod;
 373         talloc_set_destructor(handle, ldapmod_destructor);
 374 }
 375
 376 /************************************************************************
 377  Routine to manage the LDAPMod structure array
 378  manage memory used by the array, by each struct, and values
 379  ***********************************************************************/
 380
 381  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 382 {
 383         LDAPMod **mods;
 384         int i;
 385         int j;
 386
 387         mods = *modlist;
 388
 389         /* sanity checks on the mod values */
 390
 391         if (attribute == NULL || *attribute == '\0') {
 392                 return;
 393         }
 394
 395 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 396            left here so other do not re-add similar code   --jerry */
 397         if (value == NULL || *value == '\0')
 398                 return;
 399 #endif
 400
 401         if (mods == NULL) {
 402                 mods = SMB_MALLOC_P(LDAPMod *);
 403                 if (mods == NULL) {
 404                         smb_panic("smbldap_set_mod: out of memory!");
 405                         /* notreached. */
 406                 }
 407                 mods[0] = NULL;
 408         }
 409
 410         for (i = 0; mods[i] != NULL; ++i) {
 411                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 412                         break;
 413         }
 414
 415         if (mods[i] == NULL) {
 416                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 417                 if (mods == NULL) {
 418                         smb_panic("smbldap_set_mod: out of memory!");
 419                         /* notreached. */
 420                 }
 421                 mods[i] = SMB_MALLOC_P(LDAPMod);
 422                 if (mods[i] == NULL) {
 423                         smb_panic("smbldap_set_mod: out of memory!");
 424                         /* notreached. */
 425                 }
 426                 mods[i]->mod_op = modop;
 427                 mods[i]->mod_values = NULL;
 428                 mods[i]->mod_type = SMB_STRDUP(attribute);
 429                 mods[i + 1] = NULL;
 430         }
 431
 432         if (value != NULL) {
 433                 char *utf8_value = NULL;
 434                 size_t converted_size;
 435
 436                 j = 0;
 437                 if (mods[i]->mod_values != NULL) {
 438                         for (; mods[i]->mod_values[j] != NULL; j++);
 439                 }
 440                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 441
 442                 if (mods[i]->mod_values == NULL) {
 443                         smb_panic("smbldap_set_mod: out of memory!");
 444                         /* notreached. */
 445                 }
 446
 447                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
 448                         smb_panic("smbldap_set_mod: String conversion failure!");
 449                         /* notreached. */
 450                 }
 451
 452
 453                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
 454                 TALLOC_FREE(utf8_value);
 455                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
 456
 457                 mods[i]->mod_values[j + 1] = NULL;
 458         }
 459         *modlist = mods;
 460 }
 461
 462 /**********************************************************************
 463   Set attribute to newval in LDAP, regardless of what value the
 464   attribute had in LDAP before.
 465 *********************************************************************/
 466
 467  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 468                       LDAPMod ***mods,
 469                       const char *attribute, const char *newval)
 470 {
 471         char oldval[2048]; /* current largest allowed value is mungeddial */
 472         bool existed;
 473
 474         if (attribute == NULL) {
 475                 /* This can actually happen for ldapsam_compat where we for
 476                  * example don't have a password history */
 477                 return;
 478         }
 479
 480         if (existing != NULL) {
 481                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 482         } else {
 483                 existed = False;
 484                 *oldval = '\0';
 485         }
 486
 487         /* all of our string attributes are case insensitive */
 488
 489         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 490
 491                 /* Believe it or not, but LDAP will deny a delete and
 492                    an add at the same time if the values are the
 493                    same... */
 494                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 495                 return;
 496         }
 497
 498         if (existed) {
 499                 /* There has been no value before, so don't delete it.
 500                  * Here's a possible race: We might end up with
 501                  * duplicate attributes */
 502                 /* By deleting exactly the value we found in the entry this
 503                  * should be race-free in the sense that the LDAP-Server will
 504                  * deny the complete operation if somebody changed the
 505                  * attribute behind our back. */
 506                 /* This will also allow modifying single valued attributes
 507                  * in Novell NDS. In NDS you have to first remove attribute and then
 508                  * you could add new value */
 509
 510                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 511                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 512         }
 513
 514         /* Regardless of the real operation (add or modify)
 515            we add the new value here. We rely on deleting
 516            the old value, should it exist. */
 517
 518         if ((newval != NULL) && (strlen(newval) > 0)) {
 519                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 520                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 521         }
 522 }
 523
 524 /**********************************************************************
 525  Some varients of the LDAP rebind code do not pass in the third 'arg'
 526  pointer to a void*, so we try and work around it by assuming that the
 527  value of the 'LDAP *' pointer is the same as the one we had passed in
 528  **********************************************************************/
 529
 530 struct smbldap_state_lookup {
 531         LDAP *ld;
 532         struct smbldap_state *smbldap_state;
 533         struct smbldap_state_lookup *prev, *next;
 534 };
 535
 536 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 537
 538 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 539 {
 540         struct smbldap_state_lookup *t;
 541
 542         for (t = smbldap_state_lookup_list; t; t = t->next) {
 543                 if (t->ld == ld) {
 544                         return t->smbldap_state;
 545                 }
 546         }
 547         return NULL;
 548 }
 549
 550 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 551 {
 552         struct smbldap_state_lookup *t;
 553
 554         for (t = smbldap_state_lookup_list; t; t = t->next) {
 555                 if (t->smbldap_state == smbldap_state) {
 556                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 557                         SAFE_FREE(t);
 558                         return;
 559                 }
 560         }
 561 }
 562
 563 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 564 {
 565         struct smbldap_state *tmp_ldap_state;
 566         struct smbldap_state_lookup *t;
 567
 568         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 569                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 570                 return;
 571         }
 572
 573         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 574         ZERO_STRUCTP(t);
 575
 576         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 577         t->ld = ld;
 578         t->smbldap_state = smbldap_state;
 579 }
 580
 581 /********************************************************************
 582  start TLS on an existing LDAP connection
 583 *******************************************************************/
 584
 585 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 586 {
 587 #ifdef LDAP_OPT_X_TLS
 588         int rc;
 589 #endif
 590
 591         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 592                 return LDAP_SUCCESS;
 593         }
 594
 595 #ifdef LDAP_OPT_X_TLS
 596         if (version != LDAP_VERSION3) {
 597                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 598                 return LDAP_OPERATIONS_ERROR;
 599         }
 600
 601         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 602                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 603                          ldap_err2string(rc)));
 604                 return rc;
 605         }
 606
 607         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 608         return LDAP_SUCCESS;
 609 #else
 610         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 611         return LDAP_OPERATIONS_ERROR;
 612 #endif
 613 }
 614
 615 /********************************************************************
 616  setup a connection to the LDAP server based on a uri
 617 *******************************************************************/
 618
 619 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 620 {
 621         int rc;
 622
 623         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 624
 625 #ifdef HAVE_LDAP_INITIALIZE
 626
 627         rc = ldap_initialize(ldap_struct, uri);
 628         if (rc) {
 629                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 630         }
 631
 632         return rc;
 633 #else
 634
 635         /* Parse the string manually */
 636
 637         {
 638                 int port = 0;
 639                 fstring protocol;
 640                 fstring host;
 641                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 642
 643
 644                 /* skip leading "URL:" (if any) */
 645                 if ( strnequal( uri, "URL:", 4 ) ) {
 646                         uri += 4;
 647                 }
 648
 649                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 650
 651                 if (port == 0) {
 652                         if (strequal(protocol, "ldap")) {
 653                                 port = LDAP_PORT;
 654                         } else if (strequal(protocol, "ldaps")) {
 655                                 port = LDAPS_PORT;
 656                         } else {
 657                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 658                         }
 659                 }
 660
 661                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 662                         DEBUG(0, ("ldap_init failed !\n"));
 663                         return LDAP_OPERATIONS_ERROR;
 664                 }
 665
 666                 if (strequal(protocol, "ldaps")) {
 667 #ifdef LDAP_OPT_X_TLS
 668                         int tls = LDAP_OPT_X_TLS_HARD;
 669                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 670                         {
 671                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 672                         }
 673
 674                         DEBUG(3,("LDAPS option set...!\n"));
 675 #else
 676                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 677                         return LDAP_OPERATIONS_ERROR;
 678 #endif /* LDAP_OPT_X_TLS */
 679                 }
 680         }
 681 #endif /* HAVE_LDAP_INITIALIZE */
 682
 683
 684         /* now set connection timeout */
 685 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 686         {
 687                 int ct = lp_ldap_connection_timeout()*1000;
 688                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 689                 if (rc != LDAP_SUCCESS) {
 690                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 691                                 ct, ldap_err2string(rc)));
 692                 }
 693         }
 694 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 695         {
 696                 struct timeval ct;
 697                 ct.tv_usec = 0;
 698                 ct.tv_sec = lp_ldap_connection_timeout();
 699                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 700                 if (rc != LDAP_SUCCESS) {
 701                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 702                                 (int)ct.tv_sec, ldap_err2string(rc)));
 703                 }
 704         }
 705 #endif
 706
 707         return LDAP_SUCCESS;
 708 }
 709
 710 /********************************************************************
 711  try to upgrade to Version 3 LDAP if not already, in either case return current
 712  version
 713  *******************************************************************/
 714
 715 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 716 {
 717         int version;
 718         int rc;
 719
 720         /* assume the worst */
 721         *new_version = LDAP_VERSION2;
 722
 723         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 724         if (rc) {
 725                 return rc;
 726         }
 727
 728         if (version == LDAP_VERSION3) {
 729                 *new_version = LDAP_VERSION3;
 730                 return LDAP_SUCCESS;
 731         }
 732
 733         /* try upgrade */
 734         version = LDAP_VERSION3;
 735         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 736         if (rc) {
 737                 return rc;
 738         }
 739
 740         *new_version = LDAP_VERSION3;
 741         return LDAP_SUCCESS;
 742 }
 743
 744 /*******************************************************************
 745  open a connection to the ldap server (just until the bind)
 746  ******************************************************************/
 747
 748 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 749 {
 750         int rc, version;
 751
 752         rc = smb_ldap_setup_conn(ldap_struct, uri);
 753         if (rc) {
 754                 return rc;
 755         }
 756
 757         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 758         if (rc) {
 759                 return rc;
 760         }
 761
 762         rc = smb_ldap_start_tls(*ldap_struct, version);
 763         if (rc) {
 764                 return rc;
 765         }
 766
 767         return LDAP_SUCCESS;
 768 }
 769
 770 /*******************************************************************
 771  open a connection to the ldap server.
 772 ******************************************************************/
 773 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 774
 775 {
 776         int rc = LDAP_SUCCESS;
 777         int version;
 778         LDAP **ldap_struct = &ldap_state->ldap_struct;
 779
 780         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 781         if (rc) {
 782                 return rc;
 783         }
 784
 785         /* Store the LDAP pointer in a lookup list */
 786
 787         smbldap_store_state(*ldap_struct, ldap_state);
 788
 789         /* Upgrade to LDAPv3 if possible */
 790
 791         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 792         if (rc) {
 793                 return rc;
 794         }
 795
 796         /* Start TLS if required */
 797
 798         rc = smb_ldap_start_tls(*ldap_struct, version);
 799         if (rc) {
 800                 return rc;
 801         }
 802
 803         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 804         return rc;
 805 }
 806
 807 /*******************************************************************
 808  a rebind function for authenticated referrals
 809  This version takes a void* that we can shove useful stuff in :-)
 810 ******************************************************************/
 811 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 812 #else
 813 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 814                                    int *methodp, int freeit, void *arg)
 815 {
 816         struct smbldap_state *ldap_state = arg;
 817
 818         /** @TODO Should we be doing something to check what servers we rebind to?
 819             Could we get a referral to a machine that we don't want to give our
 820             username and password to? */
 821
 822         if (freeit) {
 823                 SAFE_FREE(*whop);
 824                 if (*credp) {
 825                         memset(*credp, '\0', strlen(*credp));
 826                 }
 827                 SAFE_FREE(*credp);
 828         } else {
 829                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 830                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 831
 832                 if (ldap_state->anonymous) {
 833                         *whop = NULL;
 834                         *credp = NULL;
 835                 } else {
 836                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 837                         if (!*whop) {
 838                                 return LDAP_NO_MEMORY;
 839                         }
 840                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 841                         if (!*credp) {
 842                                 SAFE_FREE(*whop);
 843                                 return LDAP_NO_MEMORY;
 844                         }
 845                 }
 846                 *methodp = LDAP_AUTH_SIMPLE;
 847         }
 848
 849         GetTimeOfDay(&ldap_state->last_rebind);
 850
 851         return 0;
 852 }
 853 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 854
 855 /*******************************************************************
 856  a rebind function for authenticated referrals
 857  This version takes a void* that we can shove useful stuff in :-)
 858  and actually does the connection.
 859 ******************************************************************/
 860 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 861 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 862                                           LDAP_CONST char *url,
 863                                           ber_tag_t request,
 864                                           ber_int_t msgid, void *arg)
 865 {
 866         struct smbldap_state *ldap_state =
 867                 (struct smbldap_state *)arg;
 868         int rc;
 869         int version;
 870
 871         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
 872                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 873
 874         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
 875          * itself) before rebinding to another LDAP server to avoid to expose
 876          * our credentials. At least *try* to secure the connection - Guenther */
 877
 878         smb_ldap_upgrade_conn(ldap_struct, &version);
 879         smb_ldap_start_tls(ldap_struct, version);
 880
 881         /** @TODO Should we be doing something to check what servers we rebind to?
 882             Could we get a referral to a machine that we don't want to give our
 883             username and password to? */
 884
 885         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 886
 887         /* only set the last rebind timestamp when we did rebind after a
 888          * non-read LDAP operation. That way we avoid the replication sleep
 889          * after a simple redirected search operation - Guenther */
 890
 891         switch (request) {
 892
 893                 case LDAP_REQ_MODIFY:
 894                 case LDAP_REQ_ADD:
 895                 case LDAP_REQ_DELETE:
 896                 case LDAP_REQ_MODDN:
 897                 case LDAP_REQ_EXTENDED:
 898                         DEBUG(10,("rebindproc_connect_with_state: "
 899                                 "setting last_rebind timestamp "
 900                                 "(req: 0x%02x)\n", (unsigned int)request));
 901                         GetTimeOfDay(&ldap_state->last_rebind);
 902                         break;
 903                 default:
 904                         ZERO_STRUCT(ldap_state->last_rebind);
 905                         break;
 906         }
 907
 908         return rc;
 909 }
 910 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 911
 912 /*******************************************************************
 913  Add a rebind function for authenticated referrals
 914 ******************************************************************/
 915 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 916 #else
 917 # if LDAP_SET_REBIND_PROC_ARGS == 2
 918 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 919                        int *method, int freeit )
 920 {
 921         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 922
 923         return rebindproc_with_state(ldap_struct, whop, credp,
 924                                      method, freeit, ldap_state);
 925
 926 }
 927 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 928 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 929
 930 /*******************************************************************
 931  a rebind function for authenticated referrals
 932  this also does the connection, but no void*.
 933 ******************************************************************/
 934 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 935 # if LDAP_SET_REBIND_PROC_ARGS == 2
 936 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 937                                ber_int_t msgid)
 938 {
 939         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 940
 941         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 942                                              ldap_state);
 943 }
 944 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 945 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 946
 947 /*******************************************************************
 948  connect to the ldap server under system privilege.
 949 ******************************************************************/
 950 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 951 {
 952         int rc;
 953         int version;
 954
 955         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
 956
 957                 /* get the default dn and password only if they are not set already */
 958                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
 959                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 960                         return LDAP_INVALID_CREDENTIALS;
 961                 }
 962         }
 963
 964         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 965            (OpenLDAP) doesnt' seem to support it */
 966
 967         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 968                   ldap_state->uri, ldap_state->bind_dn));
 969
 970 #ifdef HAVE_LDAP_SET_REBIND_PROC
 971 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 972 # if LDAP_SET_REBIND_PROC_ARGS == 2
 973         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 974 # endif
 975 # if LDAP_SET_REBIND_PROC_ARGS == 3
 976         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 977 # endif
 978 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 979 # if LDAP_SET_REBIND_PROC_ARGS == 2
 980         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 981 # endif
 982 # if LDAP_SET_REBIND_PROC_ARGS == 3
 983         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 984 # endif
 985 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 986 #endif
 987
 988         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 989
 990         if (rc != LDAP_SUCCESS) {
 991                 char *ld_error = NULL;
 992                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 993                                 &ld_error);
 994                 DEBUG(ldap_state->num_failures ? 2 : 0,
 995                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
 996                                ldap_state->uri,
 997                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
 998                                ldap_err2string(rc),
 999                                ld_error ? ld_error : "(unknown)"));
1000                 SAFE_FREE(ld_error);
1001                 ldap_state->num_failures++;
1002                 return rc;
1003         }
1004
1005         ldap_state->num_failures = 0;
1006         ldap_state->paged_results = False;
1007
1008         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1009
1010         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1011                 ldap_state->paged_results = True;
1012         }
1013
1014         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1015         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1016                 ldap_state->paged_results ? "does" : "does not"));
1017         return rc;
1018 }
1019
1020 static void smbldap_idle_fn(struct event_context *event_ctx,
1021                             struct timed_event *te,
1022                             struct timeval now,
1023                             void *private_data);
1024
1025 /**********************************************************************
1026  Connect to LDAP server (called before every ldap operation)
1027 *********************************************************************/
1028 static int smbldap_open(struct smbldap_state *ldap_state)
1029 {
1030         int rc, opt_rc;
1031         bool reopen = False;
1032         SMB_ASSERT(ldap_state);
1033
1034         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1035
1036 #ifdef HAVE_UNIXSOCKET
1037                 struct sockaddr_un addr;
1038 #else
1039                 struct sockaddr addr;
1040 #endif
1041                 socklen_t len = sizeof(addr);
1042                 int sd;
1043
1044                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1045                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1046                         reopen = True;
1047
1048 #ifdef HAVE_UNIXSOCKET
1049                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1050                         reopen = True;
1051 #endif
1052                 if (reopen) {
1053                         /* the other end has died. reopen. */
1054                         ldap_unbind(ldap_state->ldap_struct);
1055                         ldap_state->ldap_struct = NULL;
1056                         ldap_state->last_ping = (time_t)0;
1057                 } else {
1058                         ldap_state->last_ping = time(NULL);
1059                 }
1060         }
1061
1062         if (ldap_state->ldap_struct != NULL) {
1063                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1064                 return LDAP_SUCCESS;
1065         }
1066
1067         if ((rc = smbldap_open_connection(ldap_state))) {
1068                 return rc;
1069         }
1070
1071         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1072                 ldap_unbind(ldap_state->ldap_struct);
1073                 ldap_state->ldap_struct = NULL;
1074                 return rc;
1075         }
1076
1077
1078         ldap_state->last_ping = time(NULL);
1079         ldap_state->pid = sys_getpid();
1080
1081         TALLOC_FREE(ldap_state->idle_event);
1082
1083         if (ldap_state->event_context != NULL) {
1084                 ldap_state->idle_event = event_add_timed(
1085                         ldap_state->event_context, NULL,
1086                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1087                         smbldap_idle_fn, ldap_state);
1088         }
1089
1090         DEBUG(4,("The LDAP server is successfully connected\n"));
1091
1092         return LDAP_SUCCESS;
1093 }
1094
1095 /**********************************************************************
1096 Disconnect from LDAP server
1097 *********************************************************************/
1098 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1099 {
1100         if (!ldap_state)
1101                 return NT_STATUS_INVALID_PARAMETER;
1102
1103         if (ldap_state->ldap_struct != NULL) {
1104                 ldap_unbind(ldap_state->ldap_struct);
1105                 ldap_state->ldap_struct = NULL;
1106         }
1107
1108         smbldap_delete_state(ldap_state);
1109
1110         DEBUG(5,("The connection to the LDAP server was closed\n"));
1111         /* maybe free the results here --metze */
1112
1113         return NT_STATUS_OK;
1114 }
1115
1116 static bool got_alarm;
1117
1118 static void (*old_handler)(int);
1119
1120 static void gotalarm_sig(int dummy)
1121 {
1122         got_alarm = True;
1123 }
1124
1125 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1126                             int *attempts, time_t endtime)
1127 {
1128         time_t now = time(NULL);
1129         int open_rc = LDAP_SERVER_DOWN;
1130
1131         if (*rc != LDAP_SERVER_DOWN)
1132                 goto no_next;
1133
1134         if (now >= endtime) {
1135                 smbldap_close(ldap_state);
1136                 *rc = LDAP_TIMEOUT;
1137                 goto no_next;
1138         }
1139
1140         if (*attempts == 0) {
1141                 got_alarm = False;
1142                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1143                 alarm(endtime - now);
1144
1145                 if (ldap_state->pid != sys_getpid())
1146                         smbldap_close(ldap_state);
1147         }
1148
1149         while (1) {
1150
1151                 if (*attempts != 0)
1152                         smb_msleep(1000);
1153
1154                 *attempts += 1;
1155
1156                 open_rc = smbldap_open(ldap_state);
1157
1158                 if (open_rc == LDAP_SUCCESS) {
1159                         ldap_state->last_use = now;
1160                         return True;
1161                 }
1162
1163                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1164                         /* The fact that we are non-root or any other
1165                          * access-denied condition will not change in the next
1166                          * round of trying */
1167                         *rc = open_rc;
1168                         break;
1169                 }
1170
1171                 if (got_alarm) {
1172                         *rc = LDAP_TIMEOUT;
1173                         break;
1174                 }
1175
1176                 if (open_rc != LDAP_SUCCESS) {
1177                         DEBUG(1, ("Connection to LDAP server failed for the "
1178                                   "%d try!\n", *attempts));
1179                 }
1180         }
1181
1182  no_next:
1183         CatchSignal(SIGALRM, old_handler);
1184         alarm(0);
1185         ldap_state->last_use = now;
1186         return False;
1187 }
1188
1189 /*********************************************************************
1190  ********************************************************************/
1191
1192 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1193                               const char *base, int scope, const char *filter,
1194                               const char *attrs[], int attrsonly,
1195                               LDAPControl **sctrls, LDAPControl **cctrls,
1196                               int sizelimit, LDAPMessage **res)
1197 {
1198         int             rc = LDAP_SERVER_DOWN;
1199         int             attempts = 0;
1200         char           *utf8_filter;
1201         time_t          endtime = time(NULL)+lp_ldap_timeout();
1202         struct          timeval timeout;
1203         size_t          converted_size;
1204
1205         SMB_ASSERT(ldap_state);
1206
1207         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1208                  "scope => [%d]\n", base, filter, scope));
1209
1210         if (ldap_state->last_rebind.tv_sec > 0) {
1211                 struct timeval  tval;
1212                 int64_t tdiff = 0;
1213                 int             sleep_time = 0;
1214
1215                 ZERO_STRUCT(tval);
1216                 GetTimeOfDay(&tval);
1217
1218                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1219                 tdiff /= 1000; /* Convert to milliseconds. */
1220
1221                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1222                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1223
1224                 if (sleep_time > 0) {
1225                         /* we wait for the LDAP replication */
1226                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1227                                  "for LDAP replication.\n",sleep_time));
1228                         smb_msleep(sleep_time);
1229                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1230                 }
1231                 ZERO_STRUCT(ldap_state->last_rebind);
1232         }
1233
1234         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1235                 return LDAP_NO_MEMORY;
1236         }
1237
1238         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1239         timeout.tv_sec = lp_ldap_timeout();
1240         timeout.tv_usec = 0;
1241
1242         /* Setup alarm timeout.... Do we need both of these ? JRA.
1243          * Yes, I think we do need both of these. The server timeout only
1244          * covers the case where the server's operation takes too long. It
1245          * does not cover the case where the request hangs on its way to the
1246          * server. The server side timeout is not strictly necessary, it's
1247          * just a bit more kind to the server. VL. */
1248
1249         got_alarm = 0;
1250         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1251         alarm(lp_ldap_timeout());
1252         /* End setup timeout. */
1253
1254         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1255                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1256                                        utf8_filter,
1257                                        CONST_DISCARD(char **, attrs),
1258                                        attrsonly, sctrls, cctrls, &timeout,
1259                                        sizelimit, res);
1260                 if (rc != LDAP_SUCCESS) {
1261                         char *ld_error = NULL;
1262                         int ld_errno;
1263
1264                         ldap_get_option(ldap_state->ldap_struct,
1265                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1266
1267                         ldap_get_option(ldap_state->ldap_struct,
1268                                         LDAP_OPT_ERROR_STRING, &ld_error);
1269                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1270                                    "(%s)\n", base, ld_errno,
1271                                    ldap_err2string(rc),
1272                                    ld_error ? ld_error : "unknown"));
1273                         SAFE_FREE(ld_error);
1274
1275                         if (ld_errno == LDAP_SERVER_DOWN) {
1276                                 ldap_unbind(ldap_state->ldap_struct);
1277                                 ldap_state->ldap_struct = NULL;
1278                         }
1279                 }
1280         }
1281
1282         TALLOC_FREE(utf8_filter);
1283
1284         /* Teardown timeout. */
1285         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1286         alarm(0);
1287
1288         if (got_alarm != 0)
1289                 return LDAP_TIMELIMIT_EXCEEDED;
1290
1291         return rc;
1292 }
1293
1294 int smbldap_search(struct smbldap_state *ldap_state,
1295                    const char *base, int scope, const char *filter,
1296                    const char *attrs[], int attrsonly,
1297                    LDAPMessage **res)
1298 {
1299         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1300                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1301 }
1302
1303 int smbldap_search_paged(struct smbldap_state *ldap_state,
1304                          const char *base, int scope, const char *filter,
1305                          const char **attrs, int attrsonly, int pagesize,
1306                          LDAPMessage **res, void **cookie)
1307 {
1308         LDAPControl     pr;
1309         LDAPControl     **rcontrols;
1310         LDAPControl     *controls[2] = { NULL, NULL};
1311         BerElement      *cookie_be = NULL;
1312         struct berval   *cookie_bv = NULL;
1313         int             tmp = 0, i, rc;
1314         bool            critical = True;
1315
1316         *res = NULL;
1317
1318         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1319                  "scope => [%d], pagesize => [%d]\n",
1320                  base, filter, scope, pagesize));
1321
1322         cookie_be = ber_alloc_t(LBER_USE_DER);
1323         if (cookie_be == NULL) {
1324                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1325                          "NULL\n"));
1326                 return LDAP_NO_MEMORY;
1327         }
1328
1329         /* construct cookie */
1330         if (*cookie != NULL) {
1331                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1332                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1333                 *cookie = NULL;
1334         } else {
1335                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1336         }
1337         ber_flatten(cookie_be, &cookie_bv);
1338
1339         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1340         pr.ldctl_iscritical = (char) critical;
1341         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1342         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1343
1344         controls[0] = &pr;
1345         controls[1] = NULL;
1346
1347         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1348                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1349
1350         ber_free(cookie_be, 1);
1351         ber_bvfree(cookie_bv);
1352
1353         if (rc != 0) {
1354                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1355                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1356                 goto done;
1357         }
1358
1359         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1360
1361         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1362                                NULL, NULL, &rcontrols,  0);
1363         if (rc != 0) {
1364                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1365                          "with [%s]\n", ldap_err2string(rc)));
1366                 goto done;
1367         }
1368
1369         if (rcontrols == NULL)
1370                 goto done;
1371
1372         for (i=0; rcontrols[i]; i++) {
1373
1374                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1375                         continue;
1376
1377                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1378                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1379                 /* the berval is the cookie, but must be freed when it is all
1380                    done */
1381                 if (cookie_bv->bv_len)
1382                         *cookie=ber_bvdup(cookie_bv);
1383                 else
1384                         *cookie=NULL;
1385                 ber_bvfree(cookie_bv);
1386                 ber_free(cookie_be, 1);
1387                 break;
1388         }
1389         ldap_controls_free(rcontrols);
1390 done:
1391         return rc;
1392 }
1393
1394 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1395 {
1396         int             rc = LDAP_SERVER_DOWN;
1397         int             attempts = 0;
1398         char           *utf8_dn;
1399         time_t          endtime = time(NULL)+lp_ldap_timeout();
1400         size_t          converted_size;
1401
1402         SMB_ASSERT(ldap_state);
1403
1404         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1405
1406         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1407                 return LDAP_NO_MEMORY;
1408         }
1409
1410         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1411                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1412                 if (rc != LDAP_SUCCESS) {
1413                         char *ld_error = NULL;
1414                         int ld_errno;
1415
1416                         ldap_get_option(ldap_state->ldap_struct,
1417                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1418
1419                         ldap_get_option(ldap_state->ldap_struct,
1420                                         LDAP_OPT_ERROR_STRING, &ld_error);
1421                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1422                                    "(%s)\n", dn, ld_errno,
1423                                    ldap_err2string(rc),
1424                                    ld_error ? ld_error : "unknown"));
1425                         SAFE_FREE(ld_error);
1426
1427                         if (ld_errno == LDAP_SERVER_DOWN) {
1428                                 ldap_unbind(ldap_state->ldap_struct);
1429                                 ldap_state->ldap_struct = NULL;
1430                         }
1431                 }
1432         }
1433
1434         TALLOC_FREE(utf8_dn);
1435         return rc;
1436 }
1437
1438 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1439 {
1440         int             rc = LDAP_SERVER_DOWN;
1441         int             attempts = 0;
1442         char           *utf8_dn;
1443         time_t          endtime = time(NULL)+lp_ldap_timeout();
1444         size_t          converted_size;
1445
1446         SMB_ASSERT(ldap_state);
1447
1448         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1449
1450         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1451                 return LDAP_NO_MEMORY;
1452         }
1453
1454         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1455                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1456                 if (rc != LDAP_SUCCESS) {
1457                         char *ld_error = NULL;
1458                         int ld_errno;
1459
1460                         ldap_get_option(ldap_state->ldap_struct,
1461                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1462
1463                         ldap_get_option(ldap_state->ldap_struct,
1464                                         LDAP_OPT_ERROR_STRING, &ld_error);
1465                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1466                                    "(%s)\n", dn, ld_errno,
1467                                    ldap_err2string(rc),
1468                                    ld_error ? ld_error : "unknown"));
1469                         SAFE_FREE(ld_error);
1470
1471                         if (ld_errno == LDAP_SERVER_DOWN) {
1472                                 ldap_unbind(ldap_state->ldap_struct);
1473                                 ldap_state->ldap_struct = NULL;
1474                         }
1475                 }
1476         }
1477
1478         TALLOC_FREE(utf8_dn);
1479         return rc;
1480 }
1481
1482 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1483 {
1484         int             rc = LDAP_SERVER_DOWN;
1485         int             attempts = 0;
1486         char           *utf8_dn;
1487         time_t          endtime = time(NULL)+lp_ldap_timeout();
1488         size_t          converted_size;
1489
1490         SMB_ASSERT(ldap_state);
1491
1492         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1493
1494         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1495                 return LDAP_NO_MEMORY;
1496         }
1497
1498         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1499                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1500                 if (rc != LDAP_SUCCESS) {
1501                         char *ld_error = NULL;
1502                         int ld_errno;
1503
1504                         ldap_get_option(ldap_state->ldap_struct,
1505                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1506
1507                         ldap_get_option(ldap_state->ldap_struct,
1508                                         LDAP_OPT_ERROR_STRING, &ld_error);
1509                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1510                                    "(%s)\n", dn, ld_errno,
1511                                    ldap_err2string(rc),
1512                                    ld_error ? ld_error : "unknown"));
1513                         SAFE_FREE(ld_error);
1514
1515                         if (ld_errno == LDAP_SERVER_DOWN) {
1516                                 ldap_unbind(ldap_state->ldap_struct);
1517                                 ldap_state->ldap_struct = NULL;
1518                         }
1519                 }
1520         }
1521
1522         TALLOC_FREE(utf8_dn);
1523         return rc;
1524 }
1525
1526 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1527                                LDAP_CONST char *reqoid, struct berval *reqdata,
1528                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1529                                char **retoidp, struct berval **retdatap)
1530 {
1531         int             rc = LDAP_SERVER_DOWN;
1532         int             attempts = 0;
1533         time_t          endtime = time(NULL)+lp_ldap_timeout();
1534
1535         if (!ldap_state)
1536                 return (-1);
1537
1538         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1539                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1540                                                reqdata, serverctrls,
1541                                                clientctrls, retoidp, retdatap);
1542                 if (rc != LDAP_SUCCESS) {
1543                         char *ld_error = NULL;
1544                         int ld_errno;
1545
1546                         ldap_get_option(ldap_state->ldap_struct,
1547                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1548
1549                         ldap_get_option(ldap_state->ldap_struct,
1550                                         LDAP_OPT_ERROR_STRING, &ld_error);
1551                         DEBUG(10, ("Extended operation failed with error: "
1552                                    "%d (%s) (%s)\n", ld_errno,
1553                                    ldap_err2string(rc),
1554                                    ld_error ? ld_error : "unknown"));
1555                         SAFE_FREE(ld_error);
1556
1557                         if (ld_errno == LDAP_SERVER_DOWN) {
1558                                 ldap_unbind(ldap_state->ldap_struct);
1559                                 ldap_state->ldap_struct = NULL;
1560                         }
1561                 }
1562         }
1563
1564         return rc;
1565 }
1566
1567 /*******************************************************************
1568  run the search by name.
1569 ******************************************************************/
1570 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1571                            const char *filter, const char **search_attr,
1572                            LDAPMessage ** result)
1573 {
1574         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1575                               filter, search_attr, 0, result);
1576 }
1577
1578 static void smbldap_idle_fn(struct event_context *event_ctx,
1579                             struct timed_event *te,
1580                             struct timeval now,
1581                             void *private_data)
1582 {
1583         struct smbldap_state *state = (struct smbldap_state *)private_data;
1584
1585         TALLOC_FREE(state->idle_event);
1586
1587         if (state->ldap_struct == NULL) {
1588                 DEBUG(10,("ldap connection not connected...\n"));
1589                 return;
1590         }
1591
1592         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1593                 DEBUG(10,("ldap connection not idle...\n"));
1594
1595                 state->idle_event = event_add_timed(
1596                         event_ctx, NULL,
1597                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1598                         smbldap_idle_fn,
1599                         private_data);
1600                 return;
1601         }
1602
1603         DEBUG(7,("ldap connection idle...closing connection\n"));
1604         smbldap_close(state);
1605 }
1606
1607 /**********************************************************************
1608  Housekeeping
1609  *********************************************************************/
1610
1611 void smbldap_free_struct(struct smbldap_state **ldap_state)
1612 {
1613         smbldap_close(*ldap_state);
1614
1615         if ((*ldap_state)->bind_secret) {
1616                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1617         }
1618
1619         SAFE_FREE((*ldap_state)->bind_dn);
1620         SAFE_FREE((*ldap_state)->bind_secret);
1621
1622         TALLOC_FREE((*ldap_state)->idle_event);
1623
1624         *ldap_state = NULL;
1625
1626         /* No need to free any further, as it is talloc()ed */
1627 }
1628
1629
1630 /**********************************************************************
1631  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1632  *********************************************************************/
1633
1634 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1635                       const char *location,
1636                       struct smbldap_state **smbldap_state)
1637 {
1638         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1639         if (!*smbldap_state) {
1640                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1641                 return NT_STATUS_NO_MEMORY;
1642         }
1643
1644         if (location) {
1645                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1646         } else {
1647                 (*smbldap_state)->uri = "ldap://localhost";
1648         }
1649
1650         (*smbldap_state)->event_context = event_ctx;
1651
1652         return NT_STATUS_OK;
1653 }
1654
1655  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1656                          LDAPMessage *entry)
1657 {
1658         char *utf8_dn, *unix_dn;
1659         size_t converted_size;
1660
1661         utf8_dn = ldap_get_dn(ld, entry);
1662         if (!utf8_dn) {
1663                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1664                 return NULL;
1665         }
1666         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1667                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1668                            "[%s]\n", utf8_dn));
1669                 return NULL;
1670         }
1671         ldap_memfree(utf8_dn);
1672         return unix_dn;
1673 }
1674
1675 /*******************************************************************
1676  Check if root-dse has a certain Control or Extension
1677 ********************************************************************/
1678
1679 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1680 {
1681         LDAPMessage *msg = NULL;
1682         LDAPMessage *entry = NULL;
1683         char **values = NULL;
1684         int rc, num_result, num_values, i;
1685         bool result = False;
1686
1687         if (!attrs[0]) {
1688                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1689                 return False;
1690         }
1691
1692         if (!strequal(attrs[0], "supportedExtension") &&
1693             !strequal(attrs[0], "supportedControl") &&
1694             !strequal(attrs[0], "namingContexts")) {
1695                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1696                 return False;
1697         }
1698
1699         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1700                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1701
1702         if (rc != LDAP_SUCCESS) {
1703                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1704                 return False;
1705         }
1706
1707         num_result = ldap_count_entries(ld, msg);
1708
1709         if (num_result != 1) {
1710                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1711                 goto done;
1712         }
1713
1714         entry = ldap_first_entry(ld, msg);
1715
1716         if (entry == NULL) {
1717                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1718                 goto done;
1719         }
1720
1721         values = ldap_get_values(ld, entry, attrs[0]);
1722
1723         if (values == NULL) {
1724                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1725                 goto done;
1726         }
1727
1728         num_values = ldap_count_values(values);
1729
1730         if (num_values == 0) {
1731                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1732                 goto done;
1733         }
1734
1735         for (i=0; i<num_values; i++) {
1736                 if (strcmp(values[i], value) == 0)
1737                         result = True;
1738         }
1739
1740
1741  done:
1742         if (values != NULL)
1743                 ldap_value_free(values);
1744         if (msg != NULL)
1745                 ldap_msgfree(msg);
1746
1747         return result;
1748
1749 }
1750
1751 /*******************************************************************
1752  Check if LDAP-Server supports a certain Control (OID in string format)
1753 ********************************************************************/
1754
1755 bool smbldap_has_control(LDAP *ld, const char *control)
1756 {
1757         const char *attrs[] = { "supportedControl", NULL };
1758         return smbldap_check_root_dse(ld, attrs, control);
1759 }
1760
1761 /*******************************************************************
1762  Check if LDAP-Server supports a certain Extension (OID in string format)
1763 ********************************************************************/
1764
1765 bool smbldap_has_extension(LDAP *ld, const char *extension)
1766 {
1767         const char *attrs[] = { "supportedExtension", NULL };
1768         return smbldap_check_root_dse(ld, attrs, extension);
1769 }
1770
1771 /*******************************************************************
1772  Check if LDAP-Server holds a given namingContext
1773 ********************************************************************/
1774
1775 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1776 {
1777         const char *attrs[] = { "namingContexts", NULL };
1778         return smbldap_check_root_dse(ld, attrs, naming_context);
1779 }
1780
1781 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1782 {
1783         ldap_state->anonymous = anon;
1784
1785         /* free any previously set credential */
1786
1787         SAFE_FREE(ldap_state->bind_dn);
1788         if (ldap_state->bind_secret) {
1789                 /* make sure secrets are zeroed out of memory */
1790                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1791                 SAFE_FREE(ldap_state->bind_secret);
1792         }
1793
1794         if ( ! anon) {
1795                 ldap_state->bind_dn = SMB_STRDUP(dn);
1796                 ldap_state->bind_secret = SMB_STRDUP(secret);
1797         }
1798
1799         return True;
1800 }