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 #include "secrets.h"
  28 #include "../libcli/security/security.h"
  29
  30 /* Try not to hit the up or down server forever */
  31
  32 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  33 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  34
  35 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  36
  37
  38 /* attributes used by Samba 2.2 */
  39
  40 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  41         { LDAP_ATTR_UID,                "uid"           },
  42         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  43         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  44         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  45         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  46         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  47         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  48         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  49         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  50         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  51         { LDAP_ATTR_CN,                 "cn"            },
  52         { LDAP_ATTR_SN,                 "sn"            },
  53         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  54         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  55         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  56         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  57         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  58         { LDAP_ATTR_DESC,               "description"   },
  59         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  60         { LDAP_ATTR_USER_RID,           "rid"           },
  61         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  62         { LDAP_ATTR_LMPW,               "lmPassword"    },
  63         { LDAP_ATTR_NTPW,               "ntPassword"    },
  64         { LDAP_ATTR_DOMAIN,             "domain"        },
  65         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  66         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  67         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  68         { LDAP_ATTR_LIST_END,           NULL            }
  69 };
  70
  71 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  72         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  73         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  74         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  75         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  76         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  77         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  78         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  79         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  80         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  81         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  82         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  83         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  84         { LDAP_ATTR_USER_RID,           "rid"           },
  85         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  86         { LDAP_ATTR_LMPW,               "lmPassword"    },
  87         { LDAP_ATTR_NTPW,               "ntPassword"    },
  88         { LDAP_ATTR_DOMAIN,             "domain"        },
  89         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  90         { LDAP_ATTR_LIST_END,           NULL            }
  91 };
  92
  93 /* attributes used by Samba 3.0's sambaSamAccount */
  94
  95 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  96         { LDAP_ATTR_UID,                "uid"                   },
  97         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  98         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  99         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
 100         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 101         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 102         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 103         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 104         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 105         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 106         { LDAP_ATTR_CN,                 "cn"                    },
 107         { LDAP_ATTR_SN,                 "sn"                    },
 108         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 109         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 110         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 111         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 112         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 113         { LDAP_ATTR_DESC,               "description"           },
 114         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 115         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 116         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 117         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 118         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 119         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 120         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 121         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 122         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 123         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 124         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 125         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 126         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 127         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 128         { LDAP_ATTR_LIST_END,           NULL                    }
 129 };
 130
 131 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 132         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 133         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 134         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 135         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 136         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 137         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 138         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 139         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 140         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 141         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 142         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 143         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 144         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 145         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 146         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 147         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 148         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 149         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 150         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 151         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 152         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 153         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 154         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 155         { LDAP_ATTR_LIST_END,           NULL                    }
 156 };
 157
 158 /* attributes used for allocating RIDs */
 159
 160 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 161         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 162         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 163         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 164         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 165         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 166         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 167         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 168         { LDAP_ATTR_LIST_END,           NULL                    },
 169 };
 170
 171 /* Samba 3.0 group mapping attributes */
 172
 173 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 174         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 175         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 176         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 177         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 178         { LDAP_ATTR_DESC,               "description"           },
 179         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 180         { LDAP_ATTR_CN,                 "cn"                    },
 181         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 182         { LDAP_ATTR_LIST_END,           NULL                    }
 183 };
 184
 185 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 186         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 187         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 188         { LDAP_ATTR_DESC,               "description"           },
 189         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 190         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 191         { LDAP_ATTR_LIST_END,           NULL                    }
 192 };
 193
 194 /* idmap_ldap sambaUnixIdPool */
 195
 196 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 197         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 198         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 199         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 200         { LDAP_ATTR_LIST_END,           NULL                    }
 201 };
 202
 203 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 204         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 205         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 206         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 207         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 208         { LDAP_ATTR_LIST_END,           NULL                    }
 209 };
 210
 211 /**********************************************************************
 212  perform a simple table lookup and return the attribute name
 213  **********************************************************************/
 214
 215  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 216 {
 217         int i = 0;
 218
 219         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 220                 if ( table[i].attrib == key )
 221                         return table[i].name;
 222                 i++;
 223         }
 224
 225         return NULL;
 226 }
 227
 228
 229 /**********************************************************************
 230  Return the list of attribute names from a mapping table
 231  **********************************************************************/
 232
 233  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 234 {
 235         const char **names;
 236         int i = 0;
 237
 238         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 239                 i++;
 240         i++;
 241
 242         names = TALLOC_ARRAY( mem_ctx, const char*, i );
 243         if ( !names ) {
 244                 DEBUG(0,("get_attr_list: out of memory\n"));
 245                 return NULL;
 246         }
 247
 248         i = 0;
 249         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 250                 names[i] = talloc_strdup( names, table[i].name );
 251                 i++;
 252         }
 253         names[i] = NULL;
 254
 255         return names;
 256 }
 257
 258 /*******************************************************************
 259  Search an attribute and return the first value found.
 260 ******************************************************************/
 261
 262  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 263                                     const char *attribute, char *value,
 264                                     int max_len)
 265 {
 266         char **values;
 267
 268         if ( !attribute )
 269                 return False;
 270
 271         value[0] = '\0';
 272
 273         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 274                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 275
 276                 return False;
 277         }
 278
 279         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 280                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 281                           attribute, values[0]));
 282                 ldap_value_free(values);
 283                 return False;
 284         }
 285
 286         ldap_value_free(values);
 287 #ifdef DEBUG_PASSWORDS
 288         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 289 #endif
 290         return True;
 291 }
 292
 293  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 294                                         const char *attribute,
 295                                         TALLOC_CTX *mem_ctx)
 296 {
 297         char **values;
 298         char *result;
 299         size_t converted_size;
 300
 301         if (attribute == NULL) {
 302                 return NULL;
 303         }
 304
 305         values = ldap_get_values(ldap_struct, entry, attribute);
 306
 307         if (values == NULL) {
 308                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 309                 return NULL;
 310         }
 311
 312         if (ldap_count_values(values) != 1) {
 313                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 314                            attribute, ldap_count_values(values)));
 315                 ldap_value_free(values);
 316                 return NULL;
 317         }
 318
 319         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 320                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 321                 ldap_value_free(values);
 322                 return NULL;
 323         }
 324
 325         ldap_value_free(values);
 326
 327 #ifdef DEBUG_PASSWORDS
 328         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 329                      attribute, result));
 330 #endif
 331         return result;
 332 }
 333
 334  char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 335                                        const char *attribute,
 336                                        TALLOC_CTX *mem_ctx)
 337 {
 338         char **values;
 339         char *result;
 340         size_t converted_size;
 341
 342         if (attribute == NULL) {
 343                 return NULL;
 344         }
 345
 346         values = ldap_get_values(ldap_struct, entry, attribute);
 347
 348         if (values == NULL) {
 349                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 350                 return NULL;
 351         }
 352
 353         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 354                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 355                 ldap_value_free(values);
 356                 return NULL;
 357         }
 358
 359         ldap_value_free(values);
 360
 361 #ifdef DEBUG_PASSWORDS
 362         DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n",
 363                      attribute, result));
 364 #endif
 365         return result;
 366 }
 367
 368  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 369                                           const char *attribute,
 370                                           TALLOC_CTX *mem_ctx)
 371 {
 372         char **values;
 373         char *result;
 374         size_t converted_size;
 375         int i, num_values;
 376
 377         if (attribute == NULL) {
 378                 return NULL;
 379         }
 380
 381         values = ldap_get_values(ldap_struct, entry, attribute);
 382
 383         if (values == NULL) {
 384                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 385                 return NULL;
 386         }
 387
 388         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 389                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 390                 ldap_value_free(values);
 391                 return NULL;
 392         }
 393
 394         num_values = ldap_count_values(values);
 395
 396         for (i=1; i<num_values; i++) {
 397                 char *tmp;
 398
 399                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
 400                                       &converted_size)) {
 401                         DEBUG(10, ("pull_utf8_talloc failed\n"));
 402                         TALLOC_FREE(result);
 403                         ldap_value_free(values);
 404                         return NULL;
 405                 }
 406
 407                 if (StrCaseCmp(tmp, result) < 0) {
 408                         TALLOC_FREE(result);
 409                         result = tmp;
 410                 } else {
 411                         TALLOC_FREE(tmp);
 412                 }
 413         }
 414
 415         ldap_value_free(values);
 416
 417 #ifdef DEBUG_PASSWORDS
 418         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 419                      attribute, result));
 420 #endif
 421         return result;
 422 }
 423
 424  bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
 425                                  LDAPMessage *msg, const char *attrib,
 426                                  DATA_BLOB *blob)
 427 {
 428         struct berval **values;
 429
 430         values = ldap_get_values_len(ld, msg, attrib);
 431         if (!values) {
 432                 return false;
 433         }
 434
 435         if (ldap_count_values_len(values) != 1) {
 436                 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
 437                            ldap_count_values_len(values)));
 438                 return false;
 439         }
 440
 441         *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
 442                                  values[0]->bv_len);
 443         ldap_value_free_len(values);
 444
 445         return (blob->data != NULL);
 446 }
 447
 448  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
 449                        struct dom_sid *sid)
 450 {
 451         DATA_BLOB blob;
 452         bool ret;
 453
 454         if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
 455                                         &blob)) {
 456                 return false;
 457         }
 458         ret = sid_parse((char *)blob.data, blob.length, sid);
 459         TALLOC_FREE(blob.data);
 460         return ret;
 461 }
 462
 463  static int ldapmsg_destructor(LDAPMessage **result) {
 464         ldap_msgfree(*result);
 465         return 0;
 466 }
 467
 468  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 469 {
 470         LDAPMessage **handle;
 471
 472         if (result == NULL) {
 473                 return;
 474         }
 475
 476         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 477         SMB_ASSERT(handle != NULL);
 478
 479         *handle = result;
 480         talloc_set_destructor(handle, ldapmsg_destructor);
 481 }
 482
 483  static int ldapmod_destructor(LDAPMod ***mod) {
 484         ldap_mods_free(*mod, True);
 485         return 0;
 486 }
 487
 488  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 489 {
 490         LDAPMod ***handle;
 491
 492         if (mod == NULL) {
 493                 return;
 494         }
 495
 496         handle = TALLOC_P(mem_ctx, LDAPMod **);
 497         SMB_ASSERT(handle != NULL);
 498
 499         *handle = mod;
 500         talloc_set_destructor(handle, ldapmod_destructor);
 501 }
 502
 503 /************************************************************************
 504  Routine to manage the LDAPMod structure array
 505  manage memory used by the array, by each struct, and values
 506  ***********************************************************************/
 507
 508 static void smbldap_set_mod_internal(LDAPMod *** modlist, int modop, const char *attribute, const char *value, const DATA_BLOB *blob)
 509 {
 510         LDAPMod **mods;
 511         int i;
 512         int j;
 513
 514         mods = *modlist;
 515
 516         /* sanity checks on the mod values */
 517
 518         if (attribute == NULL || *attribute == '\0') {
 519                 return;
 520         }
 521
 522 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 523            left here so other do not re-add similar code   --jerry */
 524         if (value == NULL || *value == '\0')
 525                 return;
 526 #endif
 527
 528         if (mods == NULL) {
 529                 mods = SMB_MALLOC_P(LDAPMod *);
 530                 if (mods == NULL) {
 531                         smb_panic("smbldap_set_mod: out of memory!");
 532                         /* notreached. */
 533                 }
 534                 mods[0] = NULL;
 535         }
 536
 537         for (i = 0; mods[i] != NULL; ++i) {
 538                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 539                         break;
 540         }
 541
 542         if (mods[i] == NULL) {
 543                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 544                 if (mods == NULL) {
 545                         smb_panic("smbldap_set_mod: out of memory!");
 546                         /* notreached. */
 547                 }
 548                 mods[i] = SMB_MALLOC_P(LDAPMod);
 549                 if (mods[i] == NULL) {
 550                         smb_panic("smbldap_set_mod: out of memory!");
 551                         /* notreached. */
 552                 }
 553                 mods[i]->mod_op = modop;
 554                 mods[i]->mod_values = NULL;
 555                 mods[i]->mod_type = SMB_STRDUP(attribute);
 556                 mods[i + 1] = NULL;
 557         }
 558
 559         if (blob && (modop & LDAP_MOD_BVALUES)) {
 560                 j = 0;
 561                 if (mods[i]->mod_bvalues != NULL) {
 562                         for (; mods[i]->mod_bvalues[j] != NULL; j++);
 563                 }
 564                 mods[i]->mod_bvalues = SMB_REALLOC_ARRAY(mods[i]->mod_bvalues, struct berval *, j + 2);
 565
 566                 if (mods[i]->mod_bvalues == NULL) {
 567                         smb_panic("smbldap_set_mod: out of memory!");
 568                         /* notreached. */
 569                 }
 570
 571                 mods[i]->mod_bvalues[j] = SMB_MALLOC_P(struct berval);
 572                 SMB_ASSERT(mods[i]->mod_bvalues[j] != NULL);
 573
 574                 mods[i]->mod_bvalues[j]->bv_val = (char *)memdup(blob->data, blob->length);
 575                 SMB_ASSERT(mods[i]->mod_bvalues[j]->bv_val != NULL);
 576                 mods[i]->mod_bvalues[j]->bv_len = blob->length;
 577
 578                 mods[i]->mod_bvalues[j + 1] = NULL;
 579         } else if (value != NULL) {
 580                 char *utf8_value = NULL;
 581                 size_t converted_size;
 582
 583                 j = 0;
 584                 if (mods[i]->mod_values != NULL) {
 585                         for (; mods[i]->mod_values[j] != NULL; j++);
 586                 }
 587                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 588
 589                 if (mods[i]->mod_values == NULL) {
 590                         smb_panic("smbldap_set_mod: out of memory!");
 591                         /* notreached. */
 592                 }
 593
 594                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
 595                         smb_panic("smbldap_set_mod: String conversion failure!");
 596                         /* notreached. */
 597                 }
 598
 599                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
 600                 TALLOC_FREE(utf8_value);
 601                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
 602
 603                 mods[i]->mod_values[j + 1] = NULL;
 604         }
 605         *modlist = mods;
 606 }
 607
 608  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 609 {
 610         smbldap_set_mod_internal(modlist, modop, attribute, value, NULL);
 611 }
 612
 613  void smbldap_set_mod_blob(LDAPMod *** modlist, int modop, const char *attribute, const DATA_BLOB *value)
 614 {
 615         smbldap_set_mod_internal(modlist, modop | LDAP_MOD_BVALUES, attribute, NULL, value);
 616 }
 617
 618 /**********************************************************************
 619   Set attribute to newval in LDAP, regardless of what value the
 620   attribute had in LDAP before.
 621 *********************************************************************/
 622
 623 static void smbldap_make_mod_internal(LDAP *ldap_struct, LDAPMessage *existing,
 624                                       LDAPMod ***mods,
 625                                       const char *attribute, int op,
 626                                       const char *newval,
 627                                       const DATA_BLOB *newblob)
 628 {
 629         char oldval[2048]; /* current largest allowed value is mungeddial */
 630         bool existed;
 631         DATA_BLOB oldblob = data_blob_null;
 632
 633         if (attribute == NULL) {
 634                 /* This can actually happen for ldapsam_compat where we for
 635                  * example don't have a password history */
 636                 return;
 637         }
 638
 639         if (existing != NULL) {
 640                 if (op & LDAP_MOD_BVALUES) {
 641                         existed = smbldap_talloc_single_blob(talloc_tos(), ldap_struct, existing, attribute, &oldblob);
 642                 } else {
 643                         existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 644                 }
 645         } else {
 646                 existed = False;
 647                 *oldval = '\0';
 648         }
 649
 650         if (existed) {
 651                 bool equal = false;
 652                 if (op & LDAP_MOD_BVALUES) {
 653                         equal = (newblob && (data_blob_cmp(&oldblob, newblob) == 0));
 654                 } else {
 655                         /* all of our string attributes are case insensitive */
 656                         equal = (newval && (StrCaseCmp(oldval, newval) == 0));
 657                 }
 658
 659                 if (equal) {
 660                         /* Believe it or not, but LDAP will deny a delete and
 661                            an add at the same time if the values are the
 662                            same... */
 663                         DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 664                         return;
 665                 }
 666
 667                 /* There has been no value before, so don't delete it.
 668                  * Here's a possible race: We might end up with
 669                  * duplicate attributes */
 670                 /* By deleting exactly the value we found in the entry this
 671                  * should be race-free in the sense that the LDAP-Server will
 672                  * deny the complete operation if somebody changed the
 673                  * attribute behind our back. */
 674                 /* This will also allow modifying single valued attributes
 675                  * in Novell NDS. In NDS you have to first remove attribute and then
 676                  * you could add new value */
 677
 678                 if (op & LDAP_MOD_BVALUES) {
 679                         DEBUG(10,("smbldap_make_mod: deleting attribute |%s| blob\n", attribute));
 680                         smbldap_set_mod_blob(mods, LDAP_MOD_DELETE, attribute, &oldblob);
 681                 } else {
 682                         DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 683                         smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 684                 }
 685         }
 686
 687         /* Regardless of the real operation (add or modify)
 688            we add the new value here. We rely on deleting
 689            the old value, should it exist. */
 690
 691         if (op & LDAP_MOD_BVALUES) {
 692                 if (newblob && newblob->length) {
 693                         DEBUG(10,("smbldap_make_mod: adding attribute |%s| blob\n", attribute));
 694                         smbldap_set_mod_blob(mods, LDAP_MOD_ADD, attribute, newblob);
 695                 }
 696         } else {
 697                 if ((newval != NULL) && (strlen(newval) > 0)) {
 698                         DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 699                         smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 700                 }
 701         }
 702 }
 703
 704  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 705                       LDAPMod ***mods,
 706                       const char *attribute, const char *newval)
 707 {
 708         smbldap_make_mod_internal(ldap_struct, existing, mods, attribute,
 709                                   0, newval, NULL);
 710 }
 711
 712  void smbldap_make_mod_blob(LDAP *ldap_struct, LDAPMessage *existing,
 713                             LDAPMod ***mods,
 714                             const char *attribute, const DATA_BLOB *newblob)
 715 {
 716         smbldap_make_mod_internal(ldap_struct, existing, mods, attribute,
 717                                   LDAP_MOD_BVALUES, NULL, newblob);
 718 }
 719
 720 /**********************************************************************
 721  Some varients of the LDAP rebind code do not pass in the third 'arg'
 722  pointer to a void*, so we try and work around it by assuming that the
 723  value of the 'LDAP *' pointer is the same as the one we had passed in
 724  **********************************************************************/
 725
 726 struct smbldap_state_lookup {
 727         LDAP *ld;
 728         struct smbldap_state *smbldap_state;
 729         struct smbldap_state_lookup *prev, *next;
 730 };
 731
 732 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 733
 734 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 735 {
 736         struct smbldap_state_lookup *t;
 737
 738         for (t = smbldap_state_lookup_list; t; t = t->next) {
 739                 if (t->ld == ld) {
 740                         return t->smbldap_state;
 741                 }
 742         }
 743         return NULL;
 744 }
 745
 746 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 747 {
 748         struct smbldap_state_lookup *t;
 749
 750         for (t = smbldap_state_lookup_list; t; t = t->next) {
 751                 if (t->smbldap_state == smbldap_state) {
 752                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 753                         SAFE_FREE(t);
 754                         return;
 755                 }
 756         }
 757 }
 758
 759 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 760 {
 761         struct smbldap_state *tmp_ldap_state;
 762         struct smbldap_state_lookup *t;
 763
 764         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 765                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 766                 return;
 767         }
 768
 769         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 770         ZERO_STRUCTP(t);
 771
 772         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 773         t->ld = ld;
 774         t->smbldap_state = smbldap_state;
 775 }
 776
 777 /********************************************************************
 778  start TLS on an existing LDAP connection
 779 *******************************************************************/
 780
 781 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 782 {
 783 #ifdef LDAP_OPT_X_TLS
 784         int rc;
 785 #endif
 786
 787         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 788                 return LDAP_SUCCESS;
 789         }
 790
 791 #ifdef LDAP_OPT_X_TLS
 792         if (version != LDAP_VERSION3) {
 793                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 794                 return LDAP_OPERATIONS_ERROR;
 795         }
 796
 797         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 798                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 799                          ldap_err2string(rc)));
 800                 return rc;
 801         }
 802
 803         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 804         return LDAP_SUCCESS;
 805 #else
 806         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 807         return LDAP_OPERATIONS_ERROR;
 808 #endif
 809 }
 810
 811 /********************************************************************
 812  setup a connection to the LDAP server based on a uri
 813 *******************************************************************/
 814
 815 static int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 816 {
 817         int rc;
 818
 819         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 820
 821 #ifdef HAVE_LDAP_INITIALIZE
 822
 823         rc = ldap_initialize(ldap_struct, uri);
 824         if (rc) {
 825                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 826                 return rc;
 827         }
 828
 829         if (lp_ldap_follow_referral() != Auto) {
 830                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS,
 831                      lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF);
 832                 if (rc != LDAP_SUCCESS)
 833                         DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n",
 834                                 ldap_err2string(rc)));
 835         }
 836
 837         return LDAP_SUCCESS;
 838 #else
 839
 840         /* Parse the string manually */
 841
 842         {
 843                 int port = 0;
 844                 fstring protocol;
 845                 fstring host;
 846                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 847
 848
 849                 /* skip leading "URL:" (if any) */
 850                 if ( strnequal( uri, "URL:", 4 ) ) {
 851                         uri += 4;
 852                 }
 853
 854                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 855
 856                 if (port == 0) {
 857                         if (strequal(protocol, "ldap")) {
 858                                 port = LDAP_PORT;
 859                         } else if (strequal(protocol, "ldaps")) {
 860                                 port = LDAPS_PORT;
 861                         } else {
 862                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 863                         }
 864                 }
 865
 866                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 867                         DEBUG(0, ("ldap_init failed !\n"));
 868                         return LDAP_OPERATIONS_ERROR;
 869                 }
 870
 871                 if (strequal(protocol, "ldaps")) {
 872 #ifdef LDAP_OPT_X_TLS
 873                         int tls = LDAP_OPT_X_TLS_HARD;
 874                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 875                         {
 876                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 877                         }
 878
 879                         DEBUG(3,("LDAPS option set...!\n"));
 880 #else
 881                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 882                         return LDAP_OPERATIONS_ERROR;
 883 #endif /* LDAP_OPT_X_TLS */
 884                 }
 885         }
 886 #endif /* HAVE_LDAP_INITIALIZE */
 887
 888         /* now set connection timeout */
 889 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 890         {
 891                 int ct = lp_ldap_connection_timeout()*1000;
 892                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 893                 if (rc != LDAP_SUCCESS) {
 894                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 895                                 ct, ldap_err2string(rc)));
 896                 }
 897         }
 898 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 899         {
 900                 struct timeval ct;
 901                 ct.tv_usec = 0;
 902                 ct.tv_sec = lp_ldap_connection_timeout();
 903                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 904                 if (rc != LDAP_SUCCESS) {
 905                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 906                                 (int)ct.tv_sec, ldap_err2string(rc)));
 907                 }
 908         }
 909 #endif
 910
 911         return LDAP_SUCCESS;
 912 }
 913
 914 /********************************************************************
 915  try to upgrade to Version 3 LDAP if not already, in either case return current
 916  version
 917  *******************************************************************/
 918
 919 static int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 920 {
 921         int version;
 922         int rc;
 923
 924         /* assume the worst */
 925         *new_version = LDAP_VERSION2;
 926
 927         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 928         if (rc) {
 929                 return rc;
 930         }
 931
 932         if (version == LDAP_VERSION3) {
 933                 *new_version = LDAP_VERSION3;
 934                 return LDAP_SUCCESS;
 935         }
 936
 937         /* try upgrade */
 938         version = LDAP_VERSION3;
 939         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 940         if (rc) {
 941                 return rc;
 942         }
 943
 944         *new_version = LDAP_VERSION3;
 945         return LDAP_SUCCESS;
 946 }
 947
 948 /*******************************************************************
 949  open a connection to the ldap server (just until the bind)
 950  ******************************************************************/
 951
 952 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 953 {
 954         int rc, version;
 955
 956         rc = smb_ldap_setup_conn(ldap_struct, uri);
 957         if (rc) {
 958                 return rc;
 959         }
 960
 961         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 962         if (rc) {
 963                 return rc;
 964         }
 965
 966         rc = smb_ldap_start_tls(*ldap_struct, version);
 967         if (rc) {
 968                 return rc;
 969         }
 970
 971         return LDAP_SUCCESS;
 972 }
 973
 974 /*******************************************************************
 975  open a connection to the ldap server.
 976 ******************************************************************/
 977 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 978
 979 {
 980         int rc = LDAP_SUCCESS;
 981         int version;
 982         int deref;
 983         LDAP **ldap_struct = &ldap_state->ldap_struct;
 984
 985         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 986         if (rc) {
 987                 return rc;
 988         }
 989
 990         /* Store the LDAP pointer in a lookup list */
 991
 992         smbldap_store_state(*ldap_struct, ldap_state);
 993
 994         /* Upgrade to LDAPv3 if possible */
 995
 996         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 997         if (rc) {
 998                 return rc;
 999         }
1000
1001         /* Start TLS if required */
1002
1003         rc = smb_ldap_start_tls(*ldap_struct, version);
1004         if (rc) {
1005                 return rc;
1006         }
1007
1008         /* Set alias dereferencing method */
1009         deref = lp_ldap_deref();
1010         if (deref != -1) {
1011                 if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) {
1012                         DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref));
1013                 } else {
1014                         DEBUG(5,("Set dereferencing method: %d\n", deref));
1015                 }
1016         }
1017
1018         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
1019         return rc;
1020 }
1021
1022 /*******************************************************************
1023  a rebind function for authenticated referrals
1024  This version takes a void* that we can shove useful stuff in :-)
1025 ******************************************************************/
1026 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1027 #else
1028 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
1029                                    int *methodp, int freeit, void *arg)
1030 {
1031         struct smbldap_state *ldap_state = arg;
1032         struct timespec ts;
1033
1034         /** @TODO Should we be doing something to check what servers we rebind to?
1035             Could we get a referral to a machine that we don't want to give our
1036             username and password to? */
1037
1038         if (freeit) {
1039                 SAFE_FREE(*whop);
1040                 if (*credp) {
1041                         memset(*credp, '\0', strlen(*credp));
1042                 }
1043                 SAFE_FREE(*credp);
1044         } else {
1045                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
1046                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
1047
1048                 if (ldap_state->anonymous) {
1049                         *whop = NULL;
1050                         *credp = NULL;
1051                 } else {
1052                         *whop = SMB_STRDUP(ldap_state->bind_dn);
1053                         if (!*whop) {
1054                                 return LDAP_NO_MEMORY;
1055                         }
1056                         *credp = SMB_STRDUP(ldap_state->bind_secret);
1057                         if (!*credp) {
1058                                 SAFE_FREE(*whop);
1059                                 return LDAP_NO_MEMORY;
1060                         }
1061                 }
1062                 *methodp = LDAP_AUTH_SIMPLE;
1063         }
1064
1065         clock_gettime_mono(&ts);
1066         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
1067
1068         return 0;
1069 }
1070 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1071
1072 /*******************************************************************
1073  a rebind function for authenticated referrals
1074  This version takes a void* that we can shove useful stuff in :-)
1075  and actually does the connection.
1076 ******************************************************************/
1077 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1078 static int rebindproc_connect_with_state (LDAP *ldap_struct,
1079                                           LDAP_CONST char *url,
1080                                           ber_tag_t request,
1081                                           ber_int_t msgid, void *arg)
1082 {
1083         struct smbldap_state *ldap_state =
1084                 (struct smbldap_state *)arg;
1085         int rc;
1086         struct timespec ts;
1087         int version;
1088
1089         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
1090                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
1091
1092         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
1093          * itself) before rebinding to another LDAP server to avoid to expose
1094          * our credentials. At least *try* to secure the connection - Guenther */
1095
1096         smb_ldap_upgrade_conn(ldap_struct, &version);
1097         smb_ldap_start_tls(ldap_struct, version);
1098
1099         /** @TODO Should we be doing something to check what servers we rebind to?
1100             Could we get a referral to a machine that we don't want to give our
1101             username and password to? */
1102
1103         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1104
1105         /* only set the last rebind timestamp when we did rebind after a
1106          * non-read LDAP operation. That way we avoid the replication sleep
1107          * after a simple redirected search operation - Guenther */
1108
1109         switch (request) {
1110
1111                 case LDAP_REQ_MODIFY:
1112                 case LDAP_REQ_ADD:
1113                 case LDAP_REQ_DELETE:
1114                 case LDAP_REQ_MODDN:
1115                 case LDAP_REQ_EXTENDED:
1116                         DEBUG(10,("rebindproc_connect_with_state: "
1117                                 "setting last_rebind timestamp "
1118                                 "(req: 0x%02x)\n", (unsigned int)request));
1119                         clock_gettime_mono(&ts);
1120                         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
1121                         break;
1122                 default:
1123                         ZERO_STRUCT(ldap_state->last_rebind);
1124                         break;
1125         }
1126
1127         return rc;
1128 }
1129 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1130
1131 /*******************************************************************
1132  Add a rebind function for authenticated referrals
1133 ******************************************************************/
1134 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1135 #else
1136 # if LDAP_SET_REBIND_PROC_ARGS == 2
1137 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
1138                        int *method, int freeit )
1139 {
1140         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
1141
1142         return rebindproc_with_state(ldap_struct, whop, credp,
1143                                      method, freeit, ldap_state);
1144 }
1145 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1146 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1147
1148 /*******************************************************************
1149  a rebind function for authenticated referrals
1150  this also does the connection, but no void*.
1151 ******************************************************************/
1152 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1153 # if LDAP_SET_REBIND_PROC_ARGS == 2
1154 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1155                                ber_int_t msgid)
1156 {
1157         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1158
1159         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
1160                                              ldap_state);
1161 }
1162 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1163 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1164
1165 /*******************************************************************
1166  connect to the ldap server under system privilege.
1167 ******************************************************************/
1168 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1169 {
1170         int rc;
1171         int version;
1172
1173         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1174                 char *bind_dn = NULL;
1175                 char *bind_secret = NULL;
1176
1177                 /* get the default dn and password only if they are not set already */
1178                 if (!fetch_ldap_pw(&bind_dn, &bind_secret)) {
1179                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1180                         return LDAP_INVALID_CREDENTIALS;
1181                 }
1182                 smbldap_set_creds(ldap_state, false, bind_dn, bind_secret);
1183                 SAFE_FREE(bind_dn);
1184                 memset(bind_secret, '\0', strlen(bind_secret));
1185                 SAFE_FREE(bind_secret);
1186         }
1187
1188         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
1189            (OpenLDAP) doesnt' seem to support it */
1190
1191         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1192                   ldap_state->uri, ldap_state->bind_dn));
1193
1194 #ifdef HAVE_LDAP_SET_REBIND_PROC
1195 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1196 # if LDAP_SET_REBIND_PROC_ARGS == 2
1197         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
1198 # endif
1199 # if LDAP_SET_REBIND_PROC_ARGS == 3
1200         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
1201 # endif
1202 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1203 # if LDAP_SET_REBIND_PROC_ARGS == 2
1204         ldap_set_rebind_proc(ldap_struct, &rebindproc);
1205 # endif
1206 # if LDAP_SET_REBIND_PROC_ARGS == 3
1207         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
1208 # endif
1209 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1210 #endif
1211
1212         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1213
1214         if (rc != LDAP_SUCCESS) {
1215                 char *ld_error = NULL;
1216                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1217                                 &ld_error);
1218                 DEBUG(ldap_state->num_failures ? 2 : 0,
1219                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1220                                ldap_state->uri,
1221                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1222                                ldap_err2string(rc),
1223                                ld_error ? ld_error : "(unknown)"));
1224                 SAFE_FREE(ld_error);
1225                 ldap_state->num_failures++;
1226                 return rc;
1227         }
1228
1229         ldap_state->num_failures = 0;
1230         ldap_state->paged_results = False;
1231
1232         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1233
1234         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1235                 ldap_state->paged_results = True;
1236         }
1237
1238         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1239         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1240                 ldap_state->paged_results ? "does" : "does not"));
1241         return rc;
1242 }
1243
1244 static void smbldap_idle_fn(struct event_context *event_ctx,
1245                             struct timed_event *te,
1246                             struct timeval now_abs,
1247                             void *private_data);
1248
1249 /**********************************************************************
1250  Connect to LDAP server (called before every ldap operation)
1251 *********************************************************************/
1252 static int smbldap_open(struct smbldap_state *ldap_state)
1253 {
1254         int rc, opt_rc;
1255         bool reopen = False;
1256         SMB_ASSERT(ldap_state);
1257
1258         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time_mono(NULL))) {
1259
1260 #ifdef HAVE_UNIXSOCKET
1261                 struct sockaddr_un addr;
1262 #else
1263                 struct sockaddr addr;
1264 #endif
1265                 socklen_t len = sizeof(addr);
1266                 int sd;
1267
1268                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1269                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1270                         reopen = True;
1271
1272 #ifdef HAVE_UNIXSOCKET
1273                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1274                         reopen = True;
1275 #endif
1276                 if (reopen) {
1277                         /* the other end has died. reopen. */
1278                         ldap_unbind(ldap_state->ldap_struct);
1279                         ldap_state->ldap_struct = NULL;
1280                         ldap_state->last_ping = (time_t)0;
1281                 } else {
1282                         ldap_state->last_ping = time_mono(NULL);
1283                 }
1284         }
1285
1286         if (ldap_state->ldap_struct != NULL) {
1287                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1288                 return LDAP_SUCCESS;
1289         }
1290
1291         if ((rc = smbldap_open_connection(ldap_state))) {
1292                 return rc;
1293         }
1294
1295         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1296                 ldap_unbind(ldap_state->ldap_struct);
1297                 ldap_state->ldap_struct = NULL;
1298                 return rc;
1299         }
1300
1301
1302         ldap_state->last_ping = time_mono(NULL);
1303         ldap_state->pid = sys_getpid();
1304
1305         TALLOC_FREE(ldap_state->idle_event);
1306
1307         if (ldap_state->event_context != NULL) {
1308                 ldap_state->idle_event = event_add_timed(
1309                         ldap_state->event_context, ldap_state,
1310                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1311                         smbldap_idle_fn, ldap_state);
1312         }
1313
1314         DEBUG(4,("The LDAP server is successfully connected\n"));
1315
1316         return LDAP_SUCCESS;
1317 }
1318
1319 /**********************************************************************
1320 Disconnect from LDAP server
1321 *********************************************************************/
1322 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1323 {
1324         if (!ldap_state)
1325                 return NT_STATUS_INVALID_PARAMETER;
1326
1327         if (ldap_state->ldap_struct != NULL) {
1328                 ldap_unbind(ldap_state->ldap_struct);
1329                 ldap_state->ldap_struct = NULL;
1330         }
1331
1332         smbldap_delete_state(ldap_state);
1333
1334         TALLOC_FREE(ldap_state->idle_event);
1335
1336         DEBUG(5,("The connection to the LDAP server was closed\n"));
1337         /* maybe free the results here --metze */
1338
1339         return NT_STATUS_OK;
1340 }
1341
1342 static bool got_alarm;
1343
1344 static void (*old_handler)(int);
1345
1346 static void gotalarm_sig(int dummy)
1347 {
1348         got_alarm = True;
1349 }
1350
1351 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1352                             int *attempts, time_t endtime)
1353 {
1354         time_t now = time_mono(NULL);
1355         int open_rc = LDAP_SERVER_DOWN;
1356
1357         if (*rc != LDAP_SERVER_DOWN)
1358                 goto no_next;
1359
1360         if (now >= endtime) {
1361                 smbldap_close(ldap_state);
1362                 *rc = LDAP_TIMEOUT;
1363                 goto no_next;
1364         }
1365
1366         if (*attempts == 0) {
1367                 got_alarm = False;
1368                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1369                 alarm(endtime - now);
1370
1371                 if (ldap_state->pid != sys_getpid())
1372                         smbldap_close(ldap_state);
1373         }
1374
1375         while (1) {
1376
1377                 if (*attempts != 0)
1378                         smb_msleep(1000);
1379
1380                 *attempts += 1;
1381
1382                 open_rc = smbldap_open(ldap_state);
1383
1384                 if (open_rc == LDAP_SUCCESS) {
1385                         ldap_state->last_use = now;
1386                         return True;
1387                 }
1388
1389                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1390                         /* The fact that we are non-root or any other
1391                          * access-denied condition will not change in the next
1392                          * round of trying */
1393                         *rc = open_rc;
1394                         break;
1395                 }
1396
1397                 if (got_alarm) {
1398                         *rc = LDAP_TIMEOUT;
1399                         break;
1400                 }
1401
1402                 if (open_rc != LDAP_SUCCESS) {
1403                         DEBUG(1, ("Connection to LDAP server failed for the "
1404                                   "%d try!\n", *attempts));
1405                 }
1406         }
1407
1408  no_next:
1409         CatchSignal(SIGALRM, old_handler);
1410         alarm(0);
1411         ldap_state->last_use = now;
1412         return False;
1413 }
1414
1415 /*********************************************************************
1416  ********************************************************************/
1417
1418 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1419                               const char *base, int scope, const char *filter,
1420                               const char *attrs[], int attrsonly,
1421                               LDAPControl **sctrls, LDAPControl **cctrls,
1422                               int sizelimit, LDAPMessage **res)
1423 {
1424         int             rc = LDAP_SERVER_DOWN;
1425         int             attempts = 0;
1426         char           *utf8_filter;
1427         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1428         struct          timeval timeout;
1429         size_t          converted_size;
1430
1431         SMB_ASSERT(ldap_state);
1432
1433         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1434                  "scope => [%d]\n", base, filter, scope));
1435
1436         if (ldap_state->last_rebind.tv_sec > 0) {
1437                 struct timeval  tval;
1438                 struct timespec ts;
1439                 int64_t tdiff = 0;
1440                 int             sleep_time = 0;
1441
1442                 clock_gettime_mono(&ts);
1443                 tval = convert_timespec_to_timeval(ts);
1444
1445                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1446                 tdiff /= 1000; /* Convert to milliseconds. */
1447
1448                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1449                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1450
1451                 if (sleep_time > 0) {
1452                         /* we wait for the LDAP replication */
1453                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1454                                  "for LDAP replication.\n",sleep_time));
1455                         smb_msleep(sleep_time);
1456                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1457                 }
1458                 ZERO_STRUCT(ldap_state->last_rebind);
1459         }
1460
1461         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1462                 return LDAP_NO_MEMORY;
1463         }
1464
1465         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1466         timeout.tv_sec = lp_ldap_timeout();
1467         timeout.tv_usec = 0;
1468
1469         /* Setup alarm timeout.... Do we need both of these ? JRA.
1470          * Yes, I think we do need both of these. The server timeout only
1471          * covers the case where the server's operation takes too long. It
1472          * does not cover the case where the request hangs on its way to the
1473          * server. The server side timeout is not strictly necessary, it's
1474          * just a bit more kind to the server. VL. */
1475
1476         got_alarm = 0;
1477         CatchSignal(SIGALRM, gotalarm_sig);
1478         alarm(lp_ldap_timeout());
1479         /* End setup timeout. */
1480
1481         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1482                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1483                                        utf8_filter,
1484                                        CONST_DISCARD(char **, attrs),
1485                                        attrsonly, sctrls, cctrls, &timeout,
1486                                        sizelimit, res);
1487                 if (rc != LDAP_SUCCESS) {
1488                         char *ld_error = NULL;
1489                         int ld_errno;
1490
1491                         ldap_get_option(ldap_state->ldap_struct,
1492                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1493
1494                         ldap_get_option(ldap_state->ldap_struct,
1495                                         LDAP_OPT_ERROR_STRING, &ld_error);
1496                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1497                                    "(%s)\n", base, ld_errno,
1498                                    ldap_err2string(rc),
1499                                    ld_error ? ld_error : "unknown"));
1500                         SAFE_FREE(ld_error);
1501
1502                         if (ld_errno == LDAP_SERVER_DOWN) {
1503                                 ldap_unbind(ldap_state->ldap_struct);
1504                                 ldap_state->ldap_struct = NULL;
1505                         }
1506                 }
1507         }
1508
1509         TALLOC_FREE(utf8_filter);
1510
1511         /* Teardown timeout. */
1512         CatchSignal(SIGALRM, SIG_IGN);
1513         alarm(0);
1514
1515         if (got_alarm != 0)
1516                 return LDAP_TIMELIMIT_EXCEEDED;
1517
1518         return rc;
1519 }
1520
1521 int smbldap_search(struct smbldap_state *ldap_state,
1522                    const char *base, int scope, const char *filter,
1523                    const char *attrs[], int attrsonly,
1524                    LDAPMessage **res)
1525 {
1526         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1527                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1528 }
1529
1530 int smbldap_search_paged(struct smbldap_state *ldap_state,
1531                          const char *base, int scope, const char *filter,
1532                          const char **attrs, int attrsonly, int pagesize,
1533                          LDAPMessage **res, void **cookie)
1534 {
1535         LDAPControl     pr;
1536         LDAPControl     **rcontrols;
1537         LDAPControl     *controls[2] = { NULL, NULL};
1538         BerElement      *cookie_be = NULL;
1539         struct berval   *cookie_bv = NULL;
1540         int             tmp = 0, i, rc;
1541         bool            critical = True;
1542
1543         *res = NULL;
1544
1545         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1546                  "scope => [%d], pagesize => [%d]\n",
1547                  base, filter, scope, pagesize));
1548
1549         cookie_be = ber_alloc_t(LBER_USE_DER);
1550         if (cookie_be == NULL) {
1551                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1552                          "NULL\n"));
1553                 return LDAP_NO_MEMORY;
1554         }
1555
1556         /* construct cookie */
1557         if (*cookie != NULL) {
1558                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1559                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1560                 *cookie = NULL;
1561         } else {
1562                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1563         }
1564         ber_flatten(cookie_be, &cookie_bv);
1565
1566         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1567         pr.ldctl_iscritical = (char) critical;
1568         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1569         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1570
1571         controls[0] = &pr;
1572         controls[1] = NULL;
1573
1574         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1575                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1576
1577         ber_free(cookie_be, 1);
1578         ber_bvfree(cookie_bv);
1579
1580         if (rc != 0) {
1581                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1582                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1583                 goto done;
1584         }
1585
1586         DEBUG(3,("smbldap_search_paged: search was successful\n"));
1587
1588         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1589                                NULL, NULL, &rcontrols,  0);
1590         if (rc != 0) {
1591                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1592                          "with [%s]\n", ldap_err2string(rc)));
1593                 goto done;
1594         }
1595
1596         if (rcontrols == NULL)
1597                 goto done;
1598
1599         for (i=0; rcontrols[i]; i++) {
1600
1601                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1602                         continue;
1603
1604                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1605                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1606                 /* the berval is the cookie, but must be freed when it is all
1607                    done */
1608                 if (cookie_bv->bv_len)
1609                         *cookie=ber_bvdup(cookie_bv);
1610                 else
1611                         *cookie=NULL;
1612                 ber_bvfree(cookie_bv);
1613                 ber_free(cookie_be, 1);
1614                 break;
1615         }
1616         ldap_controls_free(rcontrols);
1617 done:
1618         return rc;
1619 }
1620
1621 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1622 {
1623         int             rc = LDAP_SERVER_DOWN;
1624         int             attempts = 0;
1625         char           *utf8_dn;
1626         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1627         size_t          converted_size;
1628
1629         SMB_ASSERT(ldap_state);
1630
1631         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1632
1633         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1634                 return LDAP_NO_MEMORY;
1635         }
1636
1637         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1638                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1639                 if (rc != LDAP_SUCCESS) {
1640                         char *ld_error = NULL;
1641                         int ld_errno;
1642
1643                         ldap_get_option(ldap_state->ldap_struct,
1644                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1645
1646                         ldap_get_option(ldap_state->ldap_struct,
1647                                         LDAP_OPT_ERROR_STRING, &ld_error);
1648                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1649                                    "(%s)\n", dn, ld_errno,
1650                                    ldap_err2string(rc),
1651                                    ld_error ? ld_error : "unknown"));
1652                         SAFE_FREE(ld_error);
1653
1654                         if (ld_errno == LDAP_SERVER_DOWN) {
1655                                 ldap_unbind(ldap_state->ldap_struct);
1656                                 ldap_state->ldap_struct = NULL;
1657                         }
1658                 }
1659         }
1660
1661         TALLOC_FREE(utf8_dn);
1662         return rc;
1663 }
1664
1665 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1666 {
1667         int             rc = LDAP_SERVER_DOWN;
1668         int             attempts = 0;
1669         char           *utf8_dn;
1670         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1671         size_t          converted_size;
1672
1673         SMB_ASSERT(ldap_state);
1674
1675         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1676
1677         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1678                 return LDAP_NO_MEMORY;
1679         }
1680
1681         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1682                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1683                 if (rc != LDAP_SUCCESS) {
1684                         char *ld_error = NULL;
1685                         int ld_errno;
1686
1687                         ldap_get_option(ldap_state->ldap_struct,
1688                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1689
1690                         ldap_get_option(ldap_state->ldap_struct,
1691                                         LDAP_OPT_ERROR_STRING, &ld_error);
1692                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1693                                    "(%s)\n", dn, ld_errno,
1694                                    ldap_err2string(rc),
1695                                    ld_error ? ld_error : "unknown"));
1696                         SAFE_FREE(ld_error);
1697
1698                         if (ld_errno == LDAP_SERVER_DOWN) {
1699                                 ldap_unbind(ldap_state->ldap_struct);
1700                                 ldap_state->ldap_struct = NULL;
1701                         }
1702                 }
1703         }
1704
1705         TALLOC_FREE(utf8_dn);
1706         return rc;
1707 }
1708
1709 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1710 {
1711         int             rc = LDAP_SERVER_DOWN;
1712         int             attempts = 0;
1713         char           *utf8_dn;
1714         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1715         size_t          converted_size;
1716
1717         SMB_ASSERT(ldap_state);
1718
1719         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1720
1721         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1722                 return LDAP_NO_MEMORY;
1723         }
1724
1725         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1726                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1727                 if (rc != LDAP_SUCCESS) {
1728                         char *ld_error = NULL;
1729                         int ld_errno;
1730
1731                         ldap_get_option(ldap_state->ldap_struct,
1732                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1733
1734                         ldap_get_option(ldap_state->ldap_struct,
1735                                         LDAP_OPT_ERROR_STRING, &ld_error);
1736                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1737                                    "(%s)\n", dn, ld_errno,
1738                                    ldap_err2string(rc),
1739                                    ld_error ? ld_error : "unknown"));
1740                         SAFE_FREE(ld_error);
1741
1742                         if (ld_errno == LDAP_SERVER_DOWN) {
1743                                 ldap_unbind(ldap_state->ldap_struct);
1744                                 ldap_state->ldap_struct = NULL;
1745                         }
1746                 }
1747         }
1748
1749         TALLOC_FREE(utf8_dn);
1750         return rc;
1751 }
1752
1753 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1754                                LDAP_CONST char *reqoid, struct berval *reqdata,
1755                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1756                                char **retoidp, struct berval **retdatap)
1757 {
1758         int             rc = LDAP_SERVER_DOWN;
1759         int             attempts = 0;
1760         time_t          endtime = time_mono(NULL)+lp_ldap_timeout();
1761
1762         if (!ldap_state)
1763                 return (-1);
1764
1765         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1766                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1767                                                reqdata, serverctrls,
1768                                                clientctrls, retoidp, retdatap);
1769                 if (rc != LDAP_SUCCESS) {
1770                         char *ld_error = NULL;
1771                         int ld_errno;
1772
1773                         ldap_get_option(ldap_state->ldap_struct,
1774                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1775
1776                         ldap_get_option(ldap_state->ldap_struct,
1777                                         LDAP_OPT_ERROR_STRING, &ld_error);
1778                         DEBUG(10, ("Extended operation failed with error: "
1779                                    "%d (%s) (%s)\n", ld_errno,
1780                                    ldap_err2string(rc),
1781                                    ld_error ? ld_error : "unknown"));
1782                         SAFE_FREE(ld_error);
1783
1784                         if (ld_errno == LDAP_SERVER_DOWN) {
1785                                 ldap_unbind(ldap_state->ldap_struct);
1786                                 ldap_state->ldap_struct = NULL;
1787                         }
1788                 }
1789         }
1790
1791         return rc;
1792 }
1793
1794 /*******************************************************************
1795  run the search by name.
1796 ******************************************************************/
1797 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1798                            const char *filter, const char **search_attr,
1799                            LDAPMessage ** result)
1800 {
1801         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1802                               filter, search_attr, 0, result);
1803 }
1804
1805 static void smbldap_idle_fn(struct event_context *event_ctx,
1806                             struct timed_event *te,
1807                             struct timeval now_abs,
1808                             void *private_data)
1809 {
1810         struct smbldap_state *state = (struct smbldap_state *)private_data;
1811
1812         TALLOC_FREE(state->idle_event);
1813
1814         if (state->ldap_struct == NULL) {
1815                 DEBUG(10,("ldap connection not connected...\n"));
1816                 return;
1817         }
1818
1819         if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) {
1820                 DEBUG(10,("ldap connection not idle...\n"));
1821
1822                 /* this needs to be made monotonic clock aware inside tevent: */
1823                 state->idle_event = event_add_timed(
1824                         event_ctx, state,
1825                         timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0),
1826                         smbldap_idle_fn,
1827                         private_data);
1828                 return;
1829         }
1830
1831         DEBUG(7,("ldap connection idle...closing connection\n"));
1832         smbldap_close(state);
1833 }
1834
1835 /**********************************************************************
1836  Housekeeping
1837  *********************************************************************/
1838
1839 void smbldap_free_struct(struct smbldap_state **ldap_state)
1840 {
1841         smbldap_close(*ldap_state);
1842
1843         if ((*ldap_state)->bind_secret) {
1844                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1845         }
1846
1847         SAFE_FREE((*ldap_state)->bind_dn);
1848         SAFE_FREE((*ldap_state)->bind_secret);
1849
1850         TALLOC_FREE(*ldap_state);
1851
1852         /* No need to free any further, as it is talloc()ed */
1853 }
1854
1855
1856 /**********************************************************************
1857  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1858  *********************************************************************/
1859
1860 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1861                       const char *location,
1862                       struct smbldap_state **smbldap_state)
1863 {
1864         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1865         if (!*smbldap_state) {
1866                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1867                 return NT_STATUS_NO_MEMORY;
1868         }
1869
1870         if (location) {
1871                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1872         } else {
1873                 (*smbldap_state)->uri = "ldap://localhost";
1874         }
1875
1876         (*smbldap_state)->event_context = event_ctx;
1877
1878         return NT_STATUS_OK;
1879 }
1880
1881  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1882                          LDAPMessage *entry)
1883 {
1884         char *utf8_dn, *unix_dn;
1885         size_t converted_size;
1886
1887         utf8_dn = ldap_get_dn(ld, entry);
1888         if (!utf8_dn) {
1889                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1890                 return NULL;
1891         }
1892         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1893                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1894                            "[%s]\n", utf8_dn));
1895                 return NULL;
1896         }
1897         ldap_memfree(utf8_dn);
1898         return unix_dn;
1899 }
1900
1901 /*******************************************************************
1902  Check if root-dse has a certain Control or Extension
1903 ********************************************************************/
1904
1905 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1906 {
1907         LDAPMessage *msg = NULL;
1908         LDAPMessage *entry = NULL;
1909         char **values = NULL;
1910         int rc, num_result, num_values, i;
1911         bool result = False;
1912
1913         if (!attrs[0]) {
1914                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1915                 return False;
1916         }
1917
1918         if (!strequal(attrs[0], "supportedExtension") &&
1919             !strequal(attrs[0], "supportedControl") &&
1920             !strequal(attrs[0], "namingContexts")) {
1921                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1922                 return False;
1923         }
1924
1925         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1926                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1927
1928         if (rc != LDAP_SUCCESS) {
1929                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1930                 return False;
1931         }
1932
1933         num_result = ldap_count_entries(ld, msg);
1934
1935         if (num_result != 1) {
1936                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1937                 goto done;
1938         }
1939
1940         entry = ldap_first_entry(ld, msg);
1941
1942         if (entry == NULL) {
1943                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1944                 goto done;
1945         }
1946
1947         values = ldap_get_values(ld, entry, attrs[0]);
1948
1949         if (values == NULL) {
1950                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1951                 goto done;
1952         }
1953
1954         num_values = ldap_count_values(values);
1955
1956         if (num_values == 0) {
1957                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1958                 goto done;
1959         }
1960
1961         for (i=0; i<num_values; i++) {
1962                 if (strcmp(values[i], value) == 0)
1963                         result = True;
1964         }
1965
1966
1967  done:
1968         if (values != NULL)
1969                 ldap_value_free(values);
1970         if (msg != NULL)
1971                 ldap_msgfree(msg);
1972
1973         return result;
1974
1975 }
1976
1977 /*******************************************************************
1978  Check if LDAP-Server supports a certain Control (OID in string format)
1979 ********************************************************************/
1980
1981 bool smbldap_has_control(LDAP *ld, const char *control)
1982 {
1983         const char *attrs[] = { "supportedControl", NULL };
1984         return smbldap_check_root_dse(ld, attrs, control);
1985 }
1986
1987 /*******************************************************************
1988  Check if LDAP-Server supports a certain Extension (OID in string format)
1989 ********************************************************************/
1990
1991 bool smbldap_has_extension(LDAP *ld, const char *extension)
1992 {
1993         const char *attrs[] = { "supportedExtension", NULL };
1994         return smbldap_check_root_dse(ld, attrs, extension);
1995 }
1996
1997 /*******************************************************************
1998  Check if LDAP-Server holds a given namingContext
1999 ********************************************************************/
2000
2001 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
2002 {
2003         const char *attrs[] = { "namingContexts", NULL };
2004         return smbldap_check_root_dse(ld, attrs, naming_context);
2005 }
2006
2007 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
2008 {
2009         ldap_state->anonymous = anon;
2010
2011         /* free any previously set credential */
2012
2013         SAFE_FREE(ldap_state->bind_dn);
2014         if (ldap_state->bind_secret) {
2015                 /* make sure secrets are zeroed out of memory */
2016                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
2017                 SAFE_FREE(ldap_state->bind_secret);
2018         }
2019
2020         if ( ! anon) {
2021                 ldap_state->bind_dn = SMB_STRDUP(dn);
2022                 ldap_state->bind_secret = SMB_STRDUP(secret);
2023         }
2024
2025         return True;
2026 }