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