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  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 337                                           const char *attribute,
 338                                           TALLOC_CTX *mem_ctx)
 339 {
 340         char **values;
 341         char *result;
 342         size_t converted_size;
 343         int i, num_values;
 344
 345         if (attribute == NULL) {
 346                 return NULL;
 347         }
 348
 349         values = ldap_get_values(ldap_struct, entry, attribute);
 350
 351         if (values == NULL) {
 352                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 353                 return NULL;
 354         }
 355
 356         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 357                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 358                 ldap_value_free(values);
 359                 return NULL;
 360         }
 361
 362         num_values = ldap_count_values(values);
 363
 364         for (i=1; i<num_values; i++) {
 365                 char *tmp;
 366
 367                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
 368                                       &converted_size)) {
 369                         DEBUG(10, ("pull_utf8_talloc failed\n"));
 370                         TALLOC_FREE(result);
 371                         ldap_value_free(values);
 372                         return NULL;
 373                 }
 374
 375                 if (StrCaseCmp(tmp, result) < 0) {
 376                         TALLOC_FREE(result);
 377                         result = tmp;
 378                 } else {
 379                         TALLOC_FREE(tmp);
 380                 }
 381         }
 382
 383         ldap_value_free(values);
 384
 385 #ifdef DEBUG_PASSWORDS
 386         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 387                      attribute, result));
 388 #endif
 389         return result;
 390 }
 391
 392  bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
 393                                  LDAPMessage *msg, const char *attrib,
 394                                  DATA_BLOB *blob)
 395 {
 396         struct berval **values;
 397
 398         values = ldap_get_values_len(ld, msg, attrib);
 399         if (!values) {
 400                 return false;
 401         }
 402
 403         if (ldap_count_values_len(values) != 1) {
 404                 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
 405                            ldap_count_values_len(values)));
 406                 return false;
 407         }
 408
 409         *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
 410                                  values[0]->bv_len);
 411         ldap_value_free_len(values);
 412
 413         return (blob->data != NULL);
 414 }
 415
 416  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
 417                        struct dom_sid *sid)
 418 {
 419         DATA_BLOB blob;
 420         bool ret;
 421
 422         if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
 423                                         &blob)) {
 424                 return false;
 425         }
 426         ret = sid_parse((char *)blob.data, blob.length, sid);
 427         TALLOC_FREE(blob.data);
 428         return ret;
 429 }
 430
 431  static int ldapmsg_destructor(LDAPMessage **result) {
 432         ldap_msgfree(*result);
 433         return 0;
 434 }
 435
 436  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 437 {
 438         LDAPMessage **handle;
 439
 440         if (result == NULL) {
 441                 return;
 442         }
 443
 444         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 445         SMB_ASSERT(handle != NULL);
 446
 447         *handle = result;
 448         talloc_set_destructor(handle, ldapmsg_destructor);
 449 }
 450
 451  static int ldapmod_destructor(LDAPMod ***mod) {
 452         ldap_mods_free(*mod, True);
 453         return 0;
 454 }
 455
 456  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 457 {
 458         LDAPMod ***handle;
 459
 460         if (mod == NULL) {
 461                 return;
 462         }
 463
 464         handle = TALLOC_P(mem_ctx, LDAPMod **);
 465         SMB_ASSERT(handle != NULL);
 466
 467         *handle = mod;
 468         talloc_set_destructor(handle, ldapmod_destructor);
 469 }
 470
 471 /************************************************************************
 472  Routine to manage the LDAPMod structure array
 473  manage memory used by the array, by each struct, and values
 474  ***********************************************************************/
 475
 476  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 477 {
 478         LDAPMod **mods;
 479         int i;
 480         int j;
 481
 482         mods = *modlist;
 483
 484         /* sanity checks on the mod values */
 485
 486         if (attribute == NULL || *attribute == '\0') {
 487                 return;
 488         }
 489
 490 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 491            left here so other do not re-add similar code   --jerry */
 492         if (value == NULL || *value == '\0')
 493                 return;
 494 #endif
 495
 496         if (mods == NULL) {
 497                 mods = SMB_MALLOC_P(LDAPMod *);
 498                 if (mods == NULL) {
 499                         smb_panic("smbldap_set_mod: out of memory!");
 500                         /* notreached. */
 501                 }
 502                 mods[0] = NULL;
 503         }
 504
 505         for (i = 0; mods[i] != NULL; ++i) {
 506                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 507                         break;
 508         }
 509
 510         if (mods[i] == NULL) {
 511                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 512                 if (mods == NULL) {
 513                         smb_panic("smbldap_set_mod: out of memory!");
 514                         /* notreached. */
 515                 }
 516                 mods[i] = SMB_MALLOC_P(LDAPMod);
 517                 if (mods[i] == NULL) {
 518                         smb_panic("smbldap_set_mod: out of memory!");
 519                         /* notreached. */
 520                 }
 521                 mods[i]->mod_op = modop;
 522                 mods[i]->mod_values = NULL;
 523                 mods[i]->mod_type = SMB_STRDUP(attribute);
 524                 mods[i + 1] = NULL;
 525         }
 526
 527         if (value != NULL) {
 528                 char *utf8_value = NULL;
 529                 size_t converted_size;
 530
 531                 j = 0;
 532                 if (mods[i]->mod_values != NULL) {
 533                         for (; mods[i]->mod_values[j] != NULL; j++);
 534                 }
 535                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 536
 537                 if (mods[i]->mod_values == NULL) {
 538                         smb_panic("smbldap_set_mod: out of memory!");
 539                         /* notreached. */
 540                 }
 541
 542                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
 543                         smb_panic("smbldap_set_mod: String conversion failure!");
 544                         /* notreached. */
 545                 }
 546
 547                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
 548                 TALLOC_FREE(utf8_value);
 549                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
 550
 551                 mods[i]->mod_values[j + 1] = NULL;
 552         }
 553         *modlist = mods;
 554 }
 555
 556 /**********************************************************************
 557   Set attribute to newval in LDAP, regardless of what value the
 558   attribute had in LDAP before.
 559 *********************************************************************/
 560
 561  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 562                       LDAPMod ***mods,
 563                       const char *attribute, const char *newval)
 564 {
 565         char oldval[2048]; /* current largest allowed value is mungeddial */
 566         bool existed;
 567
 568         if (attribute == NULL) {
 569                 /* This can actually happen for ldapsam_compat where we for
 570                  * example don't have a password history */
 571                 return;
 572         }
 573
 574         if (existing != NULL) {
 575                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 576         } else {
 577                 existed = False;
 578                 *oldval = '\0';
 579         }
 580
 581         /* all of our string attributes are case insensitive */
 582
 583         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 584
 585                 /* Believe it or not, but LDAP will deny a delete and
 586                    an add at the same time if the values are the
 587                    same... */
 588                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 589                 return;
 590         }
 591
 592         if (existed) {
 593                 /* There has been no value before, so don't delete it.
 594                  * Here's a possible race: We might end up with
 595                  * duplicate attributes */
 596                 /* By deleting exactly the value we found in the entry this
 597                  * should be race-free in the sense that the LDAP-Server will
 598                  * deny the complete operation if somebody changed the
 599                  * attribute behind our back. */
 600                 /* This will also allow modifying single valued attributes
 601                  * in Novell NDS. In NDS you have to first remove attribute and then
 602                  * you could add new value */
 603
 604                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 605                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 606         }
 607
 608         /* Regardless of the real operation (add or modify)
 609            we add the new value here. We rely on deleting
 610            the old value, should it exist. */
 611
 612         if ((newval != NULL) && (strlen(newval) > 0)) {
 613                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 614                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 615         }
 616 }
 617
 618 /**********************************************************************
 619  Some varients of the LDAP rebind code do not pass in the third 'arg'
 620  pointer to a void*, so we try and work around it by assuming that the
 621  value of the 'LDAP *' pointer is the same as the one we had passed in
 622  **********************************************************************/
 623
 624 struct smbldap_state_lookup {
 625         LDAP *ld;
 626         struct smbldap_state *smbldap_state;
 627         struct smbldap_state_lookup *prev, *next;
 628 };
 629
 630 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 631
 632 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 633 {
 634         struct smbldap_state_lookup *t;
 635
 636         for (t = smbldap_state_lookup_list; t; t = t->next) {
 637                 if (t->ld == ld) {
 638                         return t->smbldap_state;
 639                 }
 640         }
 641         return NULL;
 642 }
 643
 644 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 645 {
 646         struct smbldap_state_lookup *t;
 647
 648         for (t = smbldap_state_lookup_list; t; t = t->next) {
 649                 if (t->smbldap_state == smbldap_state) {
 650                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 651                         SAFE_FREE(t);
 652                         return;
 653                 }
 654         }
 655 }
 656
 657 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 658 {
 659         struct smbldap_state *tmp_ldap_state;
 660         struct smbldap_state_lookup *t;
 661
 662         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 663                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 664                 return;
 665         }
 666
 667         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 668         ZERO_STRUCTP(t);
 669
 670         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 671         t->ld = ld;
 672         t->smbldap_state = smbldap_state;
 673 }
 674
 675 /********************************************************************
 676  start TLS on an existing LDAP connection
 677 *******************************************************************/
 678
 679 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 680 {
 681 #ifdef LDAP_OPT_X_TLS
 682         int rc;
 683 #endif
 684
 685         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 686                 return LDAP_SUCCESS;
 687         }
 688
 689 #ifdef LDAP_OPT_X_TLS
 690         if (version != LDAP_VERSION3) {
 691                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 692                 return LDAP_OPERATIONS_ERROR;
 693         }
 694
 695         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 696                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 697                          ldap_err2string(rc)));
 698                 return rc;
 699         }
 700
 701         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 702         return LDAP_SUCCESS;
 703 #else
 704         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 705         return LDAP_OPERATIONS_ERROR;
 706 #endif
 707 }
 708
 709 /********************************************************************
 710  setup a connection to the LDAP server based on a uri
 711 *******************************************************************/
 712
 713 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 714 {
 715         int rc;
 716
 717         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 718
 719 #ifdef HAVE_LDAP_INITIALIZE
 720
 721         rc = ldap_initialize(ldap_struct, uri);
 722         if (rc) {
 723                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 724         }
 725
 726         return rc;
 727 #else
 728
 729         /* Parse the string manually */
 730
 731         {
 732                 int port = 0;
 733                 fstring protocol;
 734                 fstring host;
 735                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 736
 737
 738                 /* skip leading "URL:" (if any) */
 739                 if ( strnequal( uri, "URL:", 4 ) ) {
 740                         uri += 4;
 741                 }
 742
 743                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 744
 745                 if (port == 0) {
 746                         if (strequal(protocol, "ldap")) {
 747                                 port = LDAP_PORT;
 748                         } else if (strequal(protocol, "ldaps")) {
 749                                 port = LDAPS_PORT;
 750                         } else {
 751                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 752                         }
 753                 }
 754
 755                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 756                         DEBUG(0, ("ldap_init failed !\n"));
 757                         return LDAP_OPERATIONS_ERROR;
 758                 }
 759
 760                 if (strequal(protocol, "ldaps")) {
 761 #ifdef LDAP_OPT_X_TLS
 762                         int tls = LDAP_OPT_X_TLS_HARD;
 763                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 764                         {
 765                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 766                         }
 767
 768                         DEBUG(3,("LDAPS option set...!\n"));
 769 #else
 770                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 771                         return LDAP_OPERATIONS_ERROR;
 772 #endif /* LDAP_OPT_X_TLS */
 773                 }
 774         }
 775 #endif /* HAVE_LDAP_INITIALIZE */
 776
 777
 778         /* now set connection timeout */
 779 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 780         {
 781                 int ct = lp_ldap_connection_timeout()*1000;
 782                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 783                 if (rc != LDAP_SUCCESS) {
 784                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 785                                 ct, ldap_err2string(rc)));
 786                 }
 787         }
 788 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 789         {
 790                 struct timeval ct;
 791                 ct.tv_usec = 0;
 792                 ct.tv_sec = lp_ldap_connection_timeout();
 793                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 794                 if (rc != LDAP_SUCCESS) {
 795                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 796                                 (int)ct.tv_sec, ldap_err2string(rc)));
 797                 }
 798         }
 799 #endif
 800
 801         return LDAP_SUCCESS;
 802 }
 803
 804 /********************************************************************
 805  try to upgrade to Version 3 LDAP if not already, in either case return current
 806  version
 807  *******************************************************************/
 808
 809 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 810 {
 811         int version;
 812         int rc;
 813
 814         /* assume the worst */
 815         *new_version = LDAP_VERSION2;
 816
 817         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 818         if (rc) {
 819                 return rc;
 820         }
 821
 822         if (version == LDAP_VERSION3) {
 823                 *new_version = LDAP_VERSION3;
 824                 return LDAP_SUCCESS;
 825         }
 826
 827         /* try upgrade */
 828         version = LDAP_VERSION3;
 829         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 830         if (rc) {
 831                 return rc;
 832         }
 833
 834         *new_version = LDAP_VERSION3;
 835         return LDAP_SUCCESS;
 836 }
 837
 838 /*******************************************************************
 839  open a connection to the ldap server (just until the bind)
 840  ******************************************************************/
 841
 842 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 843 {
 844         int rc, version;
 845
 846         rc = smb_ldap_setup_conn(ldap_struct, uri);
 847         if (rc) {
 848                 return rc;
 849         }
 850
 851         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 852         if (rc) {
 853                 return rc;
 854         }
 855
 856         rc = smb_ldap_start_tls(*ldap_struct, version);
 857         if (rc) {
 858                 return rc;
 859         }
 860
 861         return LDAP_SUCCESS;
 862 }
 863
 864 /*******************************************************************
 865  open a connection to the ldap server.
 866 ******************************************************************/
 867 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 868
 869 {
 870         int rc = LDAP_SUCCESS;
 871         int version;
 872         LDAP **ldap_struct = &ldap_state->ldap_struct;
 873
 874         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 875         if (rc) {
 876                 return rc;
 877         }
 878
 879         /* Store the LDAP pointer in a lookup list */
 880
 881         smbldap_store_state(*ldap_struct, ldap_state);
 882
 883         /* Upgrade to LDAPv3 if possible */
 884
 885         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 886         if (rc) {
 887                 return rc;
 888         }
 889
 890         /* Start TLS if required */
 891
 892         rc = smb_ldap_start_tls(*ldap_struct, version);
 893         if (rc) {
 894                 return rc;
 895         }
 896
 897         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 898         return rc;
 899 }
 900
 901 /*******************************************************************
 902  a rebind function for authenticated referrals
 903  This version takes a void* that we can shove useful stuff in :-)
 904 ******************************************************************/
 905 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 906 #else
 907 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 908                                    int *methodp, int freeit, void *arg)
 909 {
 910         struct smbldap_state *ldap_state = arg;
 911
 912         /** @TODO Should we be doing something to check what servers we rebind to?
 913             Could we get a referral to a machine that we don't want to give our
 914             username and password to? */
 915
 916         if (freeit) {
 917                 SAFE_FREE(*whop);
 918                 if (*credp) {
 919                         memset(*credp, '\0', strlen(*credp));
 920                 }
 921                 SAFE_FREE(*credp);
 922         } else {
 923                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 924                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 925
 926                 if (ldap_state->anonymous) {
 927                         *whop = NULL;
 928                         *credp = NULL;
 929                 } else {
 930                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 931                         if (!*whop) {
 932                                 return LDAP_NO_MEMORY;
 933                         }
 934                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 935                         if (!*credp) {
 936                                 SAFE_FREE(*whop);
 937                                 return LDAP_NO_MEMORY;
 938                         }
 939                 }
 940                 *methodp = LDAP_AUTH_SIMPLE;
 941         }
 942
 943         GetTimeOfDay(&ldap_state->last_rebind);
 944
 945         return 0;
 946 }
 947 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 948
 949 /*******************************************************************
 950  a rebind function for authenticated referrals
 951  This version takes a void* that we can shove useful stuff in :-)
 952  and actually does the connection.
 953 ******************************************************************/
 954 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 955 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 956                                           LDAP_CONST char *url,
 957                                           ber_tag_t request,
 958                                           ber_int_t msgid, void *arg)
 959 {
 960         struct smbldap_state *ldap_state =
 961                 (struct smbldap_state *)arg;
 962         int rc;
 963         int version;
 964
 965         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
 966                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 967
 968         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
 969          * itself) before rebinding to another LDAP server to avoid to expose
 970          * our credentials. At least *try* to secure the connection - Guenther */
 971
 972         smb_ldap_upgrade_conn(ldap_struct, &version);
 973         smb_ldap_start_tls(ldap_struct, version);
 974
 975         /** @TODO Should we be doing something to check what servers we rebind to?
 976             Could we get a referral to a machine that we don't want to give our
 977             username and password to? */
 978
 979         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 980
 981         /* only set the last rebind timestamp when we did rebind after a
 982          * non-read LDAP operation. That way we avoid the replication sleep
 983          * after a simple redirected search operation - Guenther */
 984
 985         switch (request) {
 986
 987                 case LDAP_REQ_MODIFY:
 988                 case LDAP_REQ_ADD:
 989                 case LDAP_REQ_DELETE:
 990                 case LDAP_REQ_MODDN:
 991                 case LDAP_REQ_EXTENDED:
 992                         DEBUG(10,("rebindproc_connect_with_state: "
 993                                 "setting last_rebind timestamp "
 994                                 "(req: 0x%02x)\n", (unsigned int)request));
 995                         GetTimeOfDay(&ldap_state->last_rebind);
 996                         break;
 997                 default:
 998                         ZERO_STRUCT(ldap_state->last_rebind);
 999                         break;
1000         }
1001
1002         return rc;
1003 }
1004 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1005
1006 /*******************************************************************
1007  Add a rebind function for authenticated referrals
1008 ******************************************************************/
1009 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1010 #else
1011 # if LDAP_SET_REBIND_PROC_ARGS == 2
1012 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
1013                        int *method, int freeit )
1014 {
1015         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
1016
1017         return rebindproc_with_state(ldap_struct, whop, credp,
1018                                      method, freeit, ldap_state);
1019 }
1020 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1021 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1022
1023 /*******************************************************************
1024  a rebind function for authenticated referrals
1025  this also does the connection, but no void*.
1026 ******************************************************************/
1027 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1028 # if LDAP_SET_REBIND_PROC_ARGS == 2
1029 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1030                                ber_int_t msgid)
1031 {
1032         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1033
1034         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
1035                                              ldap_state);
1036 }
1037 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1038 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1039
1040 /*******************************************************************
1041  connect to the ldap server under system privilege.
1042 ******************************************************************/
1043 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
1044 {
1045         int rc;
1046         int version;
1047
1048         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1049
1050                 /* get the default dn and password only if they are not set already */
1051                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
1052                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1053                         return LDAP_INVALID_CREDENTIALS;
1054                 }
1055         }
1056
1057         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
1058            (OpenLDAP) doesnt' seem to support it */
1059
1060         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1061                   ldap_state->uri, ldap_state->bind_dn));
1062
1063 #ifdef HAVE_LDAP_SET_REBIND_PROC
1064 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1065 # if LDAP_SET_REBIND_PROC_ARGS == 2
1066         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
1067 # endif
1068 # if LDAP_SET_REBIND_PROC_ARGS == 3
1069         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
1070 # endif
1071 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1072 # if LDAP_SET_REBIND_PROC_ARGS == 2
1073         ldap_set_rebind_proc(ldap_struct, &rebindproc);
1074 # endif
1075 # if LDAP_SET_REBIND_PROC_ARGS == 3
1076         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
1077 # endif
1078 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1079 #endif
1080
1081         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1082
1083         if (rc != LDAP_SUCCESS) {
1084                 char *ld_error = NULL;
1085                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1086                                 &ld_error);
1087                 DEBUG(ldap_state->num_failures ? 2 : 0,
1088                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1089                                ldap_state->uri,
1090                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1091                                ldap_err2string(rc),
1092                                ld_error ? ld_error : "(unknown)"));
1093                 SAFE_FREE(ld_error);
1094                 ldap_state->num_failures++;
1095                 return rc;
1096         }
1097
1098         ldap_state->num_failures = 0;
1099         ldap_state->paged_results = False;
1100
1101         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1102
1103         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1104                 ldap_state->paged_results = True;
1105         }
1106
1107         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1108         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1109                 ldap_state->paged_results ? "does" : "does not"));
1110         return rc;
1111 }
1112
1113 static void smbldap_idle_fn(struct event_context *event_ctx,
1114                             struct timed_event *te,
1115                             struct timeval now,
1116                             void *private_data);
1117
1118 /**********************************************************************
1119  Connect to LDAP server (called before every ldap operation)
1120 *********************************************************************/
1121 static int smbldap_open(struct smbldap_state *ldap_state)
1122 {
1123         int rc, opt_rc;
1124         bool reopen = False;
1125         SMB_ASSERT(ldap_state);
1126
1127         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1128
1129 #ifdef HAVE_UNIXSOCKET
1130                 struct sockaddr_un addr;
1131 #else
1132                 struct sockaddr addr;
1133 #endif
1134                 socklen_t len = sizeof(addr);
1135                 int sd;
1136
1137                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1138                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1139                         reopen = True;
1140
1141 #ifdef HAVE_UNIXSOCKET
1142                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1143                         reopen = True;
1144 #endif
1145                 if (reopen) {
1146                         /* the other end has died. reopen. */
1147                         ldap_unbind(ldap_state->ldap_struct);
1148                         ldap_state->ldap_struct = NULL;
1149                         ldap_state->last_ping = (time_t)0;
1150                 } else {
1151                         ldap_state->last_ping = time(NULL);
1152                 }
1153         }
1154
1155         if (ldap_state->ldap_struct != NULL) {
1156                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1157                 return LDAP_SUCCESS;
1158         }
1159
1160         if ((rc = smbldap_open_connection(ldap_state))) {
1161                 return rc;
1162         }
1163
1164         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1165                 ldap_unbind(ldap_state->ldap_struct);
1166                 ldap_state->ldap_struct = NULL;
1167                 return rc;
1168         }
1169
1170
1171         ldap_state->last_ping = time(NULL);
1172         ldap_state->pid = sys_getpid();
1173
1174         TALLOC_FREE(ldap_state->idle_event);
1175
1176         if (ldap_state->event_context != NULL) {
1177                 ldap_state->idle_event = event_add_timed(
1178                         ldap_state->event_context, NULL,
1179                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1180                         smbldap_idle_fn, ldap_state);
1181         }
1182
1183         DEBUG(4,("The LDAP server is successfully connected\n"));
1184
1185         return LDAP_SUCCESS;
1186 }
1187
1188 /**********************************************************************
1189 Disconnect from LDAP server
1190 *********************************************************************/
1191 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1192 {
1193         if (!ldap_state)
1194                 return NT_STATUS_INVALID_PARAMETER;
1195
1196         if (ldap_state->ldap_struct != NULL) {
1197                 ldap_unbind(ldap_state->ldap_struct);
1198                 ldap_state->ldap_struct = NULL;
1199         }
1200
1201         smbldap_delete_state(ldap_state);
1202
1203         DEBUG(5,("The connection to the LDAP server was closed\n"));
1204         /* maybe free the results here --metze */
1205
1206         return NT_STATUS_OK;
1207 }
1208
1209 static bool got_alarm;
1210
1211 static void (*old_handler)(int);
1212
1213 static void gotalarm_sig(int dummy)
1214 {
1215         got_alarm = True;
1216 }
1217
1218 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1219                             int *attempts, time_t endtime)
1220 {
1221         time_t now = time(NULL);
1222         int open_rc = LDAP_SERVER_DOWN;
1223
1224         if (*rc != LDAP_SERVER_DOWN)
1225                 goto no_next;
1226
1227         if (now >= endtime) {
1228                 smbldap_close(ldap_state);
1229                 *rc = LDAP_TIMEOUT;
1230                 goto no_next;
1231         }
1232
1233         if (*attempts == 0) {
1234                 got_alarm = False;
1235                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1236                 alarm(endtime - now);
1237
1238                 if (ldap_state->pid != sys_getpid())
1239                         smbldap_close(ldap_state);
1240         }
1241
1242         while (1) {
1243
1244                 if (*attempts != 0)
1245                         smb_msleep(1000);
1246
1247                 *attempts += 1;
1248
1249                 open_rc = smbldap_open(ldap_state);
1250
1251                 if (open_rc == LDAP_SUCCESS) {
1252                         ldap_state->last_use = now;
1253                         return True;
1254                 }
1255
1256                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1257                         /* The fact that we are non-root or any other
1258                          * access-denied condition will not change in the next
1259                          * round of trying */
1260                         *rc = open_rc;
1261                         break;
1262                 }
1263
1264                 if (got_alarm) {
1265                         *rc = LDAP_TIMEOUT;
1266                         break;
1267                 }
1268
1269                 if (open_rc != LDAP_SUCCESS) {
1270                         DEBUG(1, ("Connection to LDAP server failed for the "
1271                                   "%d try!\n", *attempts));
1272                 }
1273         }
1274
1275  no_next:
1276         CatchSignal(SIGALRM, old_handler);
1277         alarm(0);
1278         ldap_state->last_use = now;
1279         return False;
1280 }
1281
1282 /*********************************************************************
1283  ********************************************************************/
1284
1285 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1286                               const char *base, int scope, const char *filter,
1287                               const char *attrs[], int attrsonly,
1288                               LDAPControl **sctrls, LDAPControl **cctrls,
1289                               int sizelimit, LDAPMessage **res)
1290 {
1291         int             rc = LDAP_SERVER_DOWN;
1292         int             attempts = 0;
1293         char           *utf8_filter;
1294         time_t          endtime = time(NULL)+lp_ldap_timeout();
1295         struct          timeval timeout;
1296         size_t          converted_size;
1297
1298         SMB_ASSERT(ldap_state);
1299
1300         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1301                  "scope => [%d]\n", base, filter, scope));
1302
1303         if (ldap_state->last_rebind.tv_sec > 0) {
1304                 struct timeval  tval;
1305                 int64_t tdiff = 0;
1306                 int             sleep_time = 0;
1307
1308                 ZERO_STRUCT(tval);
1309                 GetTimeOfDay(&tval);
1310
1311                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1312                 tdiff /= 1000; /* Convert to milliseconds. */
1313
1314                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1315                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1316
1317                 if (sleep_time > 0) {
1318                         /* we wait for the LDAP replication */
1319                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1320                                  "for LDAP replication.\n",sleep_time));
1321                         smb_msleep(sleep_time);
1322                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1323                 }
1324                 ZERO_STRUCT(ldap_state->last_rebind);
1325         }
1326
1327         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1328                 return LDAP_NO_MEMORY;
1329         }
1330
1331         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1332         timeout.tv_sec = lp_ldap_timeout();
1333         timeout.tv_usec = 0;
1334
1335         /* Setup alarm timeout.... Do we need both of these ? JRA.
1336          * Yes, I think we do need both of these. The server timeout only
1337          * covers the case where the server's operation takes too long. It
1338          * does not cover the case where the request hangs on its way to the
1339          * server. The server side timeout is not strictly necessary, it's
1340          * just a bit more kind to the server. VL. */
1341
1342         got_alarm = 0;
1343         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1344         alarm(lp_ldap_timeout());
1345         /* End setup timeout. */
1346
1347         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1348                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1349                                        utf8_filter,
1350                                        CONST_DISCARD(char **, attrs),
1351                                        attrsonly, sctrls, cctrls, &timeout,
1352                                        sizelimit, res);
1353                 if (rc != LDAP_SUCCESS) {
1354                         char *ld_error = NULL;
1355                         int ld_errno;
1356
1357                         ldap_get_option(ldap_state->ldap_struct,
1358                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1359
1360                         ldap_get_option(ldap_state->ldap_struct,
1361                                         LDAP_OPT_ERROR_STRING, &ld_error);
1362                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1363                                    "(%s)\n", base, ld_errno,
1364                                    ldap_err2string(rc),
1365                                    ld_error ? ld_error : "unknown"));
1366                         SAFE_FREE(ld_error);
1367
1368                         if (ld_errno == LDAP_SERVER_DOWN) {
1369                                 ldap_unbind(ldap_state->ldap_struct);
1370                                 ldap_state->ldap_struct = NULL;
1371                         }
1372                 }
1373         }
1374
1375         TALLOC_FREE(utf8_filter);
1376
1377         /* Teardown timeout. */
1378         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1379         alarm(0);
1380
1381         if (got_alarm != 0)
1382                 return LDAP_TIMELIMIT_EXCEEDED;
1383
1384         return rc;
1385 }
1386
1387 int smbldap_search(struct smbldap_state *ldap_state,
1388                    const char *base, int scope, const char *filter,
1389                    const char *attrs[], int attrsonly,
1390                    LDAPMessage **res)
1391 {
1392         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1393                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1394 }
1395
1396 int smbldap_search_paged(struct smbldap_state *ldap_state,
1397                          const char *base, int scope, const char *filter,
1398                          const char **attrs, int attrsonly, int pagesize,
1399                          LDAPMessage **res, void **cookie)
1400 {
1401         LDAPControl     pr;
1402         LDAPControl     **rcontrols;
1403         LDAPControl     *controls[2] = { NULL, NULL};
1404         BerElement      *cookie_be = NULL;
1405         struct berval   *cookie_bv = NULL;
1406         int             tmp = 0, i, rc;
1407         bool            critical = True;
1408
1409         *res = NULL;
1410
1411         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1412                  "scope => [%d], pagesize => [%d]\n",
1413                  base, filter, scope, pagesize));
1414
1415         cookie_be = ber_alloc_t(LBER_USE_DER);
1416         if (cookie_be == NULL) {
1417                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1418                          "NULL\n"));
1419                 return LDAP_NO_MEMORY;
1420         }
1421
1422         /* construct cookie */
1423         if (*cookie != NULL) {
1424                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1425                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1426                 *cookie = NULL;
1427         } else {
1428                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1429         }
1430         ber_flatten(cookie_be, &cookie_bv);
1431
1432         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1433         pr.ldctl_iscritical = (char) critical;
1434         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1435         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1436
1437         controls[0] = &pr;
1438         controls[1] = NULL;
1439
1440         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1441                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1442
1443         ber_free(cookie_be, 1);
1444         ber_bvfree(cookie_bv);
1445
1446         if (rc != 0) {
1447                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1448                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1449                 goto done;
1450         }
1451
1452         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1453
1454         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1455                                NULL, NULL, &rcontrols,  0);
1456         if (rc != 0) {
1457                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1458                          "with [%s]\n", ldap_err2string(rc)));
1459                 goto done;
1460         }
1461
1462         if (rcontrols == NULL)
1463                 goto done;
1464
1465         for (i=0; rcontrols[i]; i++) {
1466
1467                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1468                         continue;
1469
1470                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1471                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1472                 /* the berval is the cookie, but must be freed when it is all
1473                    done */
1474                 if (cookie_bv->bv_len)
1475                         *cookie=ber_bvdup(cookie_bv);
1476                 else
1477                         *cookie=NULL;
1478                 ber_bvfree(cookie_bv);
1479                 ber_free(cookie_be, 1);
1480                 break;
1481         }
1482         ldap_controls_free(rcontrols);
1483 done:
1484         return rc;
1485 }
1486
1487 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1488 {
1489         int             rc = LDAP_SERVER_DOWN;
1490         int             attempts = 0;
1491         char           *utf8_dn;
1492         time_t          endtime = time(NULL)+lp_ldap_timeout();
1493         size_t          converted_size;
1494
1495         SMB_ASSERT(ldap_state);
1496
1497         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1498
1499         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1500                 return LDAP_NO_MEMORY;
1501         }
1502
1503         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1504                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1505                 if (rc != LDAP_SUCCESS) {
1506                         char *ld_error = NULL;
1507                         int ld_errno;
1508
1509                         ldap_get_option(ldap_state->ldap_struct,
1510                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1511
1512                         ldap_get_option(ldap_state->ldap_struct,
1513                                         LDAP_OPT_ERROR_STRING, &ld_error);
1514                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1515                                    "(%s)\n", dn, ld_errno,
1516                                    ldap_err2string(rc),
1517                                    ld_error ? ld_error : "unknown"));
1518                         SAFE_FREE(ld_error);
1519
1520                         if (ld_errno == LDAP_SERVER_DOWN) {
1521                                 ldap_unbind(ldap_state->ldap_struct);
1522                                 ldap_state->ldap_struct = NULL;
1523                         }
1524                 }
1525         }
1526
1527         TALLOC_FREE(utf8_dn);
1528         return rc;
1529 }
1530
1531 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1532 {
1533         int             rc = LDAP_SERVER_DOWN;
1534         int             attempts = 0;
1535         char           *utf8_dn;
1536         time_t          endtime = time(NULL)+lp_ldap_timeout();
1537         size_t          converted_size;
1538
1539         SMB_ASSERT(ldap_state);
1540
1541         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1542
1543         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1544                 return LDAP_NO_MEMORY;
1545         }
1546
1547         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1548                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1549                 if (rc != LDAP_SUCCESS) {
1550                         char *ld_error = NULL;
1551                         int ld_errno;
1552
1553                         ldap_get_option(ldap_state->ldap_struct,
1554                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1555
1556                         ldap_get_option(ldap_state->ldap_struct,
1557                                         LDAP_OPT_ERROR_STRING, &ld_error);
1558                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1559                                    "(%s)\n", dn, ld_errno,
1560                                    ldap_err2string(rc),
1561                                    ld_error ? ld_error : "unknown"));
1562                         SAFE_FREE(ld_error);
1563
1564                         if (ld_errno == LDAP_SERVER_DOWN) {
1565                                 ldap_unbind(ldap_state->ldap_struct);
1566                                 ldap_state->ldap_struct = NULL;
1567                         }
1568                 }
1569         }
1570
1571         TALLOC_FREE(utf8_dn);
1572         return rc;
1573 }
1574
1575 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1576 {
1577         int             rc = LDAP_SERVER_DOWN;
1578         int             attempts = 0;
1579         char           *utf8_dn;
1580         time_t          endtime = time(NULL)+lp_ldap_timeout();
1581         size_t          converted_size;
1582
1583         SMB_ASSERT(ldap_state);
1584
1585         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1586
1587         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1588                 return LDAP_NO_MEMORY;
1589         }
1590
1591         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1592                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1593                 if (rc != LDAP_SUCCESS) {
1594                         char *ld_error = NULL;
1595                         int ld_errno;
1596
1597                         ldap_get_option(ldap_state->ldap_struct,
1598                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1599
1600                         ldap_get_option(ldap_state->ldap_struct,
1601                                         LDAP_OPT_ERROR_STRING, &ld_error);
1602                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1603                                    "(%s)\n", dn, ld_errno,
1604                                    ldap_err2string(rc),
1605                                    ld_error ? ld_error : "unknown"));
1606                         SAFE_FREE(ld_error);
1607
1608                         if (ld_errno == LDAP_SERVER_DOWN) {
1609                                 ldap_unbind(ldap_state->ldap_struct);
1610                                 ldap_state->ldap_struct = NULL;
1611                         }
1612                 }
1613         }
1614
1615         TALLOC_FREE(utf8_dn);
1616         return rc;
1617 }
1618
1619 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1620                                LDAP_CONST char *reqoid, struct berval *reqdata,
1621                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1622                                char **retoidp, struct berval **retdatap)
1623 {
1624         int             rc = LDAP_SERVER_DOWN;
1625         int             attempts = 0;
1626         time_t          endtime = time(NULL)+lp_ldap_timeout();
1627
1628         if (!ldap_state)
1629                 return (-1);
1630
1631         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1632                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1633                                                reqdata, serverctrls,
1634                                                clientctrls, retoidp, retdatap);
1635                 if (rc != LDAP_SUCCESS) {
1636                         char *ld_error = NULL;
1637                         int ld_errno;
1638
1639                         ldap_get_option(ldap_state->ldap_struct,
1640                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1641
1642                         ldap_get_option(ldap_state->ldap_struct,
1643                                         LDAP_OPT_ERROR_STRING, &ld_error);
1644                         DEBUG(10, ("Extended operation failed with error: "
1645                                    "%d (%s) (%s)\n", ld_errno,
1646                                    ldap_err2string(rc),
1647                                    ld_error ? ld_error : "unknown"));
1648                         SAFE_FREE(ld_error);
1649
1650                         if (ld_errno == LDAP_SERVER_DOWN) {
1651                                 ldap_unbind(ldap_state->ldap_struct);
1652                                 ldap_state->ldap_struct = NULL;
1653                         }
1654                 }
1655         }
1656
1657         return rc;
1658 }
1659
1660 /*******************************************************************
1661  run the search by name.
1662 ******************************************************************/
1663 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1664                            const char *filter, const char **search_attr,
1665                            LDAPMessage ** result)
1666 {
1667         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1668                               filter, search_attr, 0, result);
1669 }
1670
1671 static void smbldap_idle_fn(struct event_context *event_ctx,
1672                             struct timed_event *te,
1673                             struct timeval now,
1674                             void *private_data)
1675 {
1676         struct smbldap_state *state = (struct smbldap_state *)private_data;
1677
1678         TALLOC_FREE(state->idle_event);
1679
1680         if (state->ldap_struct == NULL) {
1681                 DEBUG(10,("ldap connection not connected...\n"));
1682                 return;
1683         }
1684
1685         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1686                 DEBUG(10,("ldap connection not idle...\n"));
1687
1688                 state->idle_event = event_add_timed(
1689                         event_ctx, NULL,
1690                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1691                         smbldap_idle_fn,
1692                         private_data);
1693                 return;
1694         }
1695
1696         DEBUG(7,("ldap connection idle...closing connection\n"));
1697         smbldap_close(state);
1698 }
1699
1700 /**********************************************************************
1701  Housekeeping
1702  *********************************************************************/
1703
1704 void smbldap_free_struct(struct smbldap_state **ldap_state)
1705 {
1706         smbldap_close(*ldap_state);
1707
1708         if ((*ldap_state)->bind_secret) {
1709                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1710         }
1711
1712         SAFE_FREE((*ldap_state)->bind_dn);
1713         SAFE_FREE((*ldap_state)->bind_secret);
1714
1715         TALLOC_FREE((*ldap_state)->idle_event);
1716
1717         *ldap_state = NULL;
1718
1719         /* No need to free any further, as it is talloc()ed */
1720 }
1721
1722
1723 /**********************************************************************
1724  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1725  *********************************************************************/
1726
1727 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1728                       const char *location,
1729                       struct smbldap_state **smbldap_state)
1730 {
1731         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1732         if (!*smbldap_state) {
1733                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1734                 return NT_STATUS_NO_MEMORY;
1735         }
1736
1737         if (location) {
1738                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1739         } else {
1740                 (*smbldap_state)->uri = "ldap://localhost";
1741         }
1742
1743         (*smbldap_state)->event_context = event_ctx;
1744
1745         return NT_STATUS_OK;
1746 }
1747
1748  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1749                          LDAPMessage *entry)
1750 {
1751         char *utf8_dn, *unix_dn;
1752         size_t converted_size;
1753
1754         utf8_dn = ldap_get_dn(ld, entry);
1755         if (!utf8_dn) {
1756                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1757                 return NULL;
1758         }
1759         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1760                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1761                            "[%s]\n", utf8_dn));
1762                 return NULL;
1763         }
1764         ldap_memfree(utf8_dn);
1765         return unix_dn;
1766 }
1767
1768 /*******************************************************************
1769  Check if root-dse has a certain Control or Extension
1770 ********************************************************************/
1771
1772 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1773 {
1774         LDAPMessage *msg = NULL;
1775         LDAPMessage *entry = NULL;
1776         char **values = NULL;
1777         int rc, num_result, num_values, i;
1778         bool result = False;
1779
1780         if (!attrs[0]) {
1781                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1782                 return False;
1783         }
1784
1785         if (!strequal(attrs[0], "supportedExtension") &&
1786             !strequal(attrs[0], "supportedControl") &&
1787             !strequal(attrs[0], "namingContexts")) {
1788                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1789                 return False;
1790         }
1791
1792         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1793                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1794
1795         if (rc != LDAP_SUCCESS) {
1796                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1797                 return False;
1798         }
1799
1800         num_result = ldap_count_entries(ld, msg);
1801
1802         if (num_result != 1) {
1803                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1804                 goto done;
1805         }
1806
1807         entry = ldap_first_entry(ld, msg);
1808
1809         if (entry == NULL) {
1810                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1811                 goto done;
1812         }
1813
1814         values = ldap_get_values(ld, entry, attrs[0]);
1815
1816         if (values == NULL) {
1817                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1818                 goto done;
1819         }
1820
1821         num_values = ldap_count_values(values);
1822
1823         if (num_values == 0) {
1824                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1825                 goto done;
1826         }
1827
1828         for (i=0; i<num_values; i++) {
1829                 if (strcmp(values[i], value) == 0)
1830                         result = True;
1831         }
1832
1833
1834  done:
1835         if (values != NULL)
1836                 ldap_value_free(values);
1837         if (msg != NULL)
1838                 ldap_msgfree(msg);
1839
1840         return result;
1841
1842 }
1843
1844 /*******************************************************************
1845  Check if LDAP-Server supports a certain Control (OID in string format)
1846 ********************************************************************/
1847
1848 bool smbldap_has_control(LDAP *ld, const char *control)
1849 {
1850         const char *attrs[] = { "supportedControl", NULL };
1851         return smbldap_check_root_dse(ld, attrs, control);
1852 }
1853
1854 /*******************************************************************
1855  Check if LDAP-Server supports a certain Extension (OID in string format)
1856 ********************************************************************/
1857
1858 bool smbldap_has_extension(LDAP *ld, const char *extension)
1859 {
1860         const char *attrs[] = { "supportedExtension", NULL };
1861         return smbldap_check_root_dse(ld, attrs, extension);
1862 }
1863
1864 /*******************************************************************
1865  Check if LDAP-Server holds a given namingContext
1866 ********************************************************************/
1867
1868 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1869 {
1870         const char *attrs[] = { "namingContexts", NULL };
1871         return smbldap_check_root_dse(ld, attrs, naming_context);
1872 }
1873
1874 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1875 {
1876         ldap_state->anonymous = anon;
1877
1878         /* free any previously set credential */
1879
1880         SAFE_FREE(ldap_state->bind_dn);
1881         if (ldap_state->bind_secret) {
1882                 /* make sure secrets are zeroed out of memory */
1883                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1884                 SAFE_FREE(ldap_state->bind_secret);
1885         }
1886
1887         if ( ! anon) {
1888                 ldap_state->bind_dn = SMB_STRDUP(dn);
1889                 ldap_state->bind_secret = SMB_STRDUP(secret);
1890         }
1891
1892         return True;
1893 }