source3/lib/smbldap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    LDAP protocol helper functions for SAMBA
   4    Copyright (C) Jean François Micouleau       1998
   5    Copyright (C) Gerald Carter                  2001-2003
   6    Copyright (C) Shahms King                    2001
   7    Copyright (C) Andrew Bartlett                2002-2003
   8    Copyright (C) Stefan (metze) Metzmacher      2002-2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 */
  24
  25 #include "includes.h"
  26 #include "smbldap.h"
  27
  28 #ifndef LDAP_OPT_SUCCESS
  29 #define LDAP_OPT_SUCCESS 0
  30 #endif
  31
  32 /* Try not to hit the up or down server forever */
  33
  34 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  35 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  36
  37 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  38
  39
  40 /* attributes used by Samba 2.2 */
  41
  42 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  43         { LDAP_ATTR_UID,                "uid"           },
  44         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  45         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  46         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  47         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  48         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  49         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  50         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  51         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  52         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  53         { LDAP_ATTR_CN,                 "cn"            },
  54         { LDAP_ATTR_SN,                 "sn"            },
  55         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  56         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  57         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  58         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  59         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  60         { LDAP_ATTR_DESC,               "description"   },
  61         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  62         { LDAP_ATTR_USER_RID,           "rid"           },
  63         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  64         { LDAP_ATTR_LMPW,               "lmPassword"    },
  65         { LDAP_ATTR_NTPW,               "ntPassword"    },
  66         { LDAP_ATTR_DOMAIN,             "domain"        },
  67         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  68         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  69         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  70         { LDAP_ATTR_LIST_END,           NULL            }
  71 };
  72
  73 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  74         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  75         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  76         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  77         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  78         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  79         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  80         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  81         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  82         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  83         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  84         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  85         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  86         { LDAP_ATTR_USER_RID,           "rid"           },
  87         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  88         { LDAP_ATTR_LMPW,               "lmPassword"    },
  89         { LDAP_ATTR_NTPW,               "ntPassword"    },
  90         { LDAP_ATTR_DOMAIN,             "domain"        },
  91         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  92         { LDAP_ATTR_LIST_END,           NULL            }
  93 };
  94
  95 /* attributes used by Samba 3.0's sambaSamAccount */
  96
  97 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  98         { LDAP_ATTR_UID,                "uid"                   },
  99         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 100         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 101         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
 102         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 103         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 104         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 105         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 106         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 107         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 108         { LDAP_ATTR_CN,                 "cn"                    },
 109         { LDAP_ATTR_SN,                 "sn"                    },
 110         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 111         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 112         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 113         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 114         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 115         { LDAP_ATTR_DESC,               "description"           },
 116         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 117         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 118         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 119         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 120         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 121         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 122         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 123         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 124         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 125         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 126         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 127         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 128         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 129         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 130         { LDAP_ATTR_LIST_END,           NULL                    }
 131 };
 132
 133 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 134         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 135         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 136         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 137         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 138         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 139         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 140         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 141         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 142         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 143         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 144         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 145         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 146         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 147         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 148         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 149         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 150         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 151         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 152         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 153         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 154         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 155         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 156         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 157         { LDAP_ATTR_LIST_END,           NULL                    }
 158 };
 159
 160 /* attributes used for allocating RIDs */
 161
 162 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 163         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 164         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 165         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 166         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 167         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 168         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 169         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 170         { LDAP_ATTR_LIST_END,           NULL                    },
 171 };
 172
 173 /* Samba 3.0 group mapping attributes */
 174
 175 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 176         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 177         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 178         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 179         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 180         { LDAP_ATTR_DESC,               "description"           },
 181         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 182         { LDAP_ATTR_CN,                 "cn"                    },
 183         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 184         { LDAP_ATTR_LIST_END,           NULL                    }
 185 };
 186
 187 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 188         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 189         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 190         { LDAP_ATTR_DESC,               "description"           },
 191         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 192         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 193         { LDAP_ATTR_LIST_END,           NULL                    }
 194 };
 195
 196 /* idmap_ldap sambaUnixIdPool */
 197
 198 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 199         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 200         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 201         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 202         { LDAP_ATTR_LIST_END,           NULL                    }
 203 };
 204
 205 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 206         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 207         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 208         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 209         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 210         { LDAP_ATTR_LIST_END,           NULL                    }
 211 };
 212
 213 /**********************************************************************
 214  perform a simple table lookup and return the attribute name
 215  **********************************************************************/
 216
 217  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 218 {
 219         int i = 0;
 220
 221         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 222                 if ( table[i].attrib == key )
 223                         return table[i].name;
 224                 i++;
 225         }
 226
 227         return NULL;
 228 }
 229
 230
 231 /**********************************************************************
 232  Return the list of attribute names from a mapping table
 233  **********************************************************************/
 234
 235  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 236 {
 237         const char **names;
 238         int i = 0;
 239
 240         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 241                 i++;
 242         i++;
 243
 244         names = TALLOC_ARRAY( mem_ctx, const char*, i );
 245         if ( !names ) {
 246                 DEBUG(0,("get_attr_list: out of memory\n"));
 247                 return NULL;
 248         }
 249
 250         i = 0;
 251         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 252                 names[i] = talloc_strdup( names, table[i].name );
 253                 i++;
 254         }
 255         names[i] = NULL;
 256
 257         return names;
 258 }
 259
 260 /*******************************************************************
 261  Search an attribute and return the first value found.
 262 ******************************************************************/
 263
 264  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 265                                     const char *attribute, char *value,
 266                                     int max_len)
 267 {
 268         char **values;
 269
 270         if ( !attribute )
 271                 return False;
 272
 273         value[0] = '\0';
 274
 275         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 276                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 277
 278                 return False;
 279         }
 280
 281         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 282                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 283                           attribute, values[0]));
 284                 ldap_value_free(values);
 285                 return False;
 286         }
 287
 288         ldap_value_free(values);
 289 #ifdef DEBUG_PASSWORDS
 290         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 291 #endif
 292         return True;
 293 }
 294
 295  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 296                                         const char *attribute,
 297                                         TALLOC_CTX *mem_ctx)
 298 {
 299         char **values;
 300         char *result;
 301         size_t converted_size;
 302
 303         if (attribute == NULL) {
 304                 return NULL;
 305         }
 306
 307         values = ldap_get_values(ldap_struct, entry, attribute);
 308
 309         if (values == NULL) {
 310                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 311                 return NULL;
 312         }
 313
 314         if (ldap_count_values(values) != 1) {
 315                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 316                            attribute, ldap_count_values(values)));
 317                 ldap_value_free(values);
 318                 return NULL;
 319         }
 320
 321         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 322                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 323                 ldap_value_free(values);
 324                 return NULL;
 325         }
 326
 327         ldap_value_free(values);
 328
 329 #ifdef DEBUG_PASSWORDS
 330         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 331                      attribute, result));
 332 #endif
 333         return result;
 334 }
 335
 336  static int ldapmsg_destructor(LDAPMessage **result) {
 337         ldap_msgfree(*result);
 338         return 0;
 339 }
 340
 341  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 342 {
 343         LDAPMessage **handle;
 344
 345         if (result == NULL) {
 346                 return;
 347         }
 348
 349         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 350         SMB_ASSERT(handle != NULL);
 351
 352         *handle = result;
 353         talloc_set_destructor(handle, ldapmsg_destructor);
 354 }
 355
 356  static int ldapmod_destructor(LDAPMod ***mod) {
 357         ldap_mods_free(*mod, True);
 358         return 0;
 359 }
 360
 361  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 362 {
 363         LDAPMod ***handle;
 364
 365         if (mod == NULL) {
 366                 return;
 367         }
 368
 369         handle = TALLOC_P(mem_ctx, LDAPMod **);
 370         SMB_ASSERT(handle != NULL);
 371
 372         *handle = mod;
 373         talloc_set_destructor(handle, ldapmod_destructor);
 374 }
 375
 376 /************************************************************************
 377  Routine to manage the LDAPMod structure array
 378  manage memory used by the array, by each struct, and values
 379  ***********************************************************************/
 380
 381  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 382 {
 383         LDAPMod **mods;
 384         int i;
 385         int j;
 386
 387         mods = *modlist;
 388
 389         /* sanity checks on the mod values */
 390
 391         if (attribute == NULL || *attribute == '\0') {
 392                 return;
 393         }
 394
 395 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 396            left here so other do not re-add similar code   --jerry */
 397         if (value == NULL || *value == '\0')
 398                 return;
 399 #endif
 400
 401         if (mods == NULL) {
 402                 mods = SMB_MALLOC_P(LDAPMod *);
 403                 if (mods == NULL) {
 404                         smb_panic("smbldap_set_mod: out of memory!");
 405                         /* notreached. */
 406                 }
 407                 mods[0] = NULL;
 408         }
 409
 410         for (i = 0; mods[i] != NULL; ++i) {
 411                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 412                         break;
 413         }
 414
 415         if (mods[i] == NULL) {
 416                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 417                 if (mods == NULL) {
 418                         smb_panic("smbldap_set_mod: out of memory!");
 419                         /* notreached. */
 420                 }
 421                 mods[i] = SMB_MALLOC_P(LDAPMod);
 422                 if (mods[i] == NULL) {
 423                         smb_panic("smbldap_set_mod: out of memory!");
 424                         /* notreached. */
 425                 }
 426                 mods[i]->mod_op = modop;
 427                 mods[i]->mod_values = NULL;
 428                 mods[i]->mod_type = SMB_STRDUP(attribute);
 429                 mods[i + 1] = NULL;
 430         }
 431
 432         if (value != NULL) {
 433                 char *utf8_value = NULL;
 434                 size_t converted_size;
 435
 436                 j = 0;
 437                 if (mods[i]->mod_values != NULL) {
 438                         for (; mods[i]->mod_values[j] != NULL; j++);
 439                 }
 440                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 441
 442                 if (mods[i]->mod_values == NULL) {
 443                         smb_panic("smbldap_set_mod: out of memory!");
 444                         /* notreached. */
 445                 }
 446
 447                 if (!push_utf8_allocate(&utf8_value, value, &converted_size)) {
 448                         smb_panic("smbldap_set_mod: String conversion failure!");
 449                         /* notreached. */
 450                 }
 451
 452                 mods[i]->mod_values[j] = utf8_value;
 453
 454                 mods[i]->mod_values[j + 1] = NULL;
 455         }
 456         *modlist = mods;
 457 }
 458
 459 /**********************************************************************
 460   Set attribute to newval in LDAP, regardless of what value the
 461   attribute had in LDAP before.
 462 *********************************************************************/
 463
 464  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 465                       LDAPMod ***mods,
 466                       const char *attribute, const char *newval)
 467 {
 468         char oldval[2048]; /* current largest allowed value is mungeddial */
 469         bool existed;
 470
 471         if (attribute == NULL) {
 472                 /* This can actually happen for ldapsam_compat where we for
 473                  * example don't have a password history */
 474                 return;
 475         }
 476
 477         if (existing != NULL) {
 478                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 479         } else {
 480                 existed = False;
 481                 *oldval = '\0';
 482         }
 483
 484         /* all of our string attributes are case insensitive */
 485
 486         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 487
 488                 /* Believe it or not, but LDAP will deny a delete and
 489                    an add at the same time if the values are the
 490                    same... */
 491                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 492                 return;
 493         }
 494
 495         if (existed) {
 496                 /* There has been no value before, so don't delete it.
 497                  * Here's a possible race: We might end up with
 498                  * duplicate attributes */
 499                 /* By deleting exactly the value we found in the entry this
 500                  * should be race-free in the sense that the LDAP-Server will
 501                  * deny the complete operation if somebody changed the
 502                  * attribute behind our back. */
 503                 /* This will also allow modifying single valued attributes
 504                  * in Novell NDS. In NDS you have to first remove attribute and then
 505                  * you could add new value */
 506
 507                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 508                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 509         }
 510
 511         /* Regardless of the real operation (add or modify)
 512            we add the new value here. We rely on deleting
 513            the old value, should it exist. */
 514
 515         if ((newval != NULL) && (strlen(newval) > 0)) {
 516                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 517                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 518         }
 519 }
 520
 521 /**********************************************************************
 522  Some varients of the LDAP rebind code do not pass in the third 'arg'
 523  pointer to a void*, so we try and work around it by assuming that the
 524  value of the 'LDAP *' pointer is the same as the one we had passed in
 525  **********************************************************************/
 526
 527 struct smbldap_state_lookup {
 528         LDAP *ld;
 529         struct smbldap_state *smbldap_state;
 530         struct smbldap_state_lookup *prev, *next;
 531 };
 532
 533 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 534
 535 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 536 {
 537         struct smbldap_state_lookup *t;
 538
 539         for (t = smbldap_state_lookup_list; t; t = t->next) {
 540                 if (t->ld == ld) {
 541                         return t->smbldap_state;
 542                 }
 543         }
 544         return NULL;
 545 }
 546
 547 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 548 {
 549         struct smbldap_state_lookup *t;
 550
 551         for (t = smbldap_state_lookup_list; t; t = t->next) {
 552                 if (t->smbldap_state == smbldap_state) {
 553                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 554                         SAFE_FREE(t);
 555                         return;
 556                 }
 557         }
 558 }
 559
 560 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 561 {
 562         struct smbldap_state *tmp_ldap_state;
 563         struct smbldap_state_lookup *t;
 564
 565         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 566                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 567                 return;
 568         }
 569
 570         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 571         ZERO_STRUCTP(t);
 572
 573         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 574         t->ld = ld;
 575         t->smbldap_state = smbldap_state;
 576 }
 577
 578 /********************************************************************
 579  start TLS on an existing LDAP connection
 580 *******************************************************************/
 581
 582 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 583 {
 584 #ifdef LDAP_OPT_X_TLS
 585         int rc;
 586 #endif
 587
 588         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 589                 return LDAP_SUCCESS;
 590         }
 591
 592 #ifdef LDAP_OPT_X_TLS
 593         if (version != LDAP_VERSION3) {
 594                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 595                 return LDAP_OPERATIONS_ERROR;
 596         }
 597
 598         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 599                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 600                          ldap_err2string(rc)));
 601                 return rc;
 602         }
 603
 604         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 605         return LDAP_SUCCESS;
 606 #else
 607         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 608         return LDAP_OPERATIONS_ERROR;
 609 #endif
 610 }
 611
 612 /********************************************************************
 613  setup a connection to the LDAP server based on a uri
 614 *******************************************************************/
 615
 616 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 617 {
 618         int rc;
 619
 620         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 621
 622 #ifdef HAVE_LDAP_INITIALIZE
 623
 624         rc = ldap_initialize(ldap_struct, uri);
 625         if (rc) {
 626                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 627         }
 628
 629         return rc;
 630 #else
 631
 632         /* Parse the string manually */
 633
 634         {
 635                 int port = 0;
 636                 fstring protocol;
 637                 fstring host;
 638                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 639
 640
 641                 /* skip leading "URL:" (if any) */
 642                 if ( strnequal( uri, "URL:", 4 ) ) {
 643                         uri += 4;
 644                 }
 645
 646                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 647
 648                 if (port == 0) {
 649                         if (strequal(protocol, "ldap")) {
 650                                 port = LDAP_PORT;
 651                         } else if (strequal(protocol, "ldaps")) {
 652                                 port = LDAPS_PORT;
 653                         } else {
 654                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 655                         }
 656                 }
 657
 658                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 659                         DEBUG(0, ("ldap_init failed !\n"));
 660                         return LDAP_OPERATIONS_ERROR;
 661                 }
 662
 663                 if (strequal(protocol, "ldaps")) {
 664 #ifdef LDAP_OPT_X_TLS
 665                         int tls = LDAP_OPT_X_TLS_HARD;
 666                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 667                         {
 668                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 669                         }
 670
 671                         DEBUG(3,("LDAPS option set...!\n"));
 672 #else
 673                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 674                         return LDAP_OPERATIONS_ERROR;
 675 #endif /* LDAP_OPT_X_TLS */
 676                 }
 677         }
 678 #endif /* HAVE_LDAP_INITIALIZE */
 679
 680
 681         /* now set connection timeout */
 682 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 683         {
 684                 int ct = lp_ldap_connection_timeout()*1000;
 685                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 686                 if (rc != LDAP_SUCCESS) {
 687                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 688                                 ct, ldap_err2string(rc)));
 689                 }
 690         }
 691 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 692         {
 693                 struct timeval ct;
 694                 ct.tv_usec = 0;
 695                 ct.tv_sec = lp_ldap_connection_timeout();
 696                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 697                 if (rc != LDAP_SUCCESS) {
 698                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 699                                 (int)ct.tv_sec, ldap_err2string(rc)));
 700                 }
 701         }
 702 #endif
 703
 704         return LDAP_SUCCESS;
 705 }
 706
 707 /********************************************************************
 708  try to upgrade to Version 3 LDAP if not already, in either case return current
 709  version
 710  *******************************************************************/
 711
 712 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 713 {
 714         int version;
 715         int rc;
 716
 717         /* assume the worst */
 718         *new_version = LDAP_VERSION2;
 719
 720         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 721         if (rc) {
 722                 return rc;
 723         }
 724
 725         if (version == LDAP_VERSION3) {
 726                 *new_version = LDAP_VERSION3;
 727                 return LDAP_SUCCESS;
 728         }
 729
 730         /* try upgrade */
 731         version = LDAP_VERSION3;
 732         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 733         if (rc) {
 734                 return rc;
 735         }
 736
 737         *new_version = LDAP_VERSION3;
 738         return LDAP_SUCCESS;
 739 }
 740
 741 /*******************************************************************
 742  open a connection to the ldap server (just until the bind)
 743  ******************************************************************/
 744
 745 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 746 {
 747         int rc, version;
 748
 749         rc = smb_ldap_setup_conn(ldap_struct, uri);
 750         if (rc) {
 751                 return rc;
 752         }
 753
 754         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 755         if (rc) {
 756                 return rc;
 757         }
 758
 759         rc = smb_ldap_start_tls(*ldap_struct, version);
 760         if (rc) {
 761                 return rc;
 762         }
 763
 764         return LDAP_SUCCESS;
 765 }
 766
 767 /*******************************************************************
 768  open a connection to the ldap server.
 769 ******************************************************************/
 770 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 771
 772 {
 773         int rc = LDAP_SUCCESS;
 774         int version;
 775         LDAP **ldap_struct = &ldap_state->ldap_struct;
 776
 777         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 778         if (rc) {
 779                 return rc;
 780         }
 781
 782         /* Store the LDAP pointer in a lookup list */
 783
 784         smbldap_store_state(*ldap_struct, ldap_state);
 785
 786         /* Upgrade to LDAPv3 if possible */
 787
 788         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 789         if (rc) {
 790                 return rc;
 791         }
 792
 793         /* Start TLS if required */
 794
 795         rc = smb_ldap_start_tls(*ldap_struct, version);
 796         if (rc) {
 797                 return rc;
 798         }
 799
 800         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 801         return rc;
 802 }
 803
 804 /*******************************************************************
 805  a rebind function for authenticated referrals
 806  This version takes a void* that we can shove useful stuff in :-)
 807 ******************************************************************/
 808 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 809 #else
 810 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 811                                    int *methodp, int freeit, void *arg)
 812 {
 813         struct smbldap_state *ldap_state = arg;
 814
 815         /** @TODO Should we be doing something to check what servers we rebind to?
 816             Could we get a referral to a machine that we don't want to give our
 817             username and password to? */
 818
 819         if (freeit) {
 820                 SAFE_FREE(*whop);
 821                 if (*credp) {
 822                         memset(*credp, '\0', strlen(*credp));
 823                 }
 824                 SAFE_FREE(*credp);
 825         } else {
 826                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 827                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 828
 829                 if (ldap_state->anonymous) {
 830                         *whop = NULL;
 831                         *credp = NULL;
 832                 } else {
 833                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 834                         if (!*whop) {
 835                                 return LDAP_NO_MEMORY;
 836                         }
 837                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 838                         if (!*credp) {
 839                                 SAFE_FREE(*whop);
 840                                 return LDAP_NO_MEMORY;
 841                         }
 842                 }
 843                 *methodp = LDAP_AUTH_SIMPLE;
 844         }
 845
 846         GetTimeOfDay(&ldap_state->last_rebind);
 847
 848         return 0;
 849 }
 850 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 851
 852 /*******************************************************************
 853  a rebind function for authenticated referrals
 854  This version takes a void* that we can shove useful stuff in :-)
 855  and actually does the connection.
 856 ******************************************************************/
 857 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 858 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 859                                           LDAP_CONST char *url,
 860                                           ber_tag_t request,
 861                                           ber_int_t msgid, void *arg)
 862 {
 863         struct smbldap_state *ldap_state =
 864                 (struct smbldap_state *)arg;
 865         int rc;
 866         int version;
 867
 868         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
 869                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 870
 871         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
 872          * itself) before rebinding to another LDAP server to avoid to expose
 873          * our credentials. At least *try* to secure the connection - Guenther */
 874
 875         smb_ldap_upgrade_conn(ldap_struct, &version);
 876         smb_ldap_start_tls(ldap_struct, version);
 877
 878         /** @TODO Should we be doing something to check what servers we rebind to?
 879             Could we get a referral to a machine that we don't want to give our
 880             username and password to? */
 881
 882         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 883
 884         /* only set the last rebind timestamp when we did rebind after a
 885          * non-read LDAP operation. That way we avoid the replication sleep
 886          * after a simple redirected search operation - Guenther */
 887
 888         switch (request) {
 889
 890                 case LDAP_REQ_MODIFY:
 891                 case LDAP_REQ_ADD:
 892                 case LDAP_REQ_DELETE:
 893                 case LDAP_REQ_MODDN:
 894                 case LDAP_REQ_EXTENDED:
 895                         DEBUG(10,("rebindproc_connect_with_state: "
 896                                 "setting last_rebind timestamp "
 897                                 "(req: 0x%02x)\n", (unsigned int)request));
 898                         GetTimeOfDay(&ldap_state->last_rebind);
 899                         break;
 900                 default:
 901                         ZERO_STRUCT(ldap_state->last_rebind);
 902                         break;
 903         }
 904
 905         return rc;
 906 }
 907 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 908
 909 /*******************************************************************
 910  Add a rebind function for authenticated referrals
 911 ******************************************************************/
 912 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 913 #else
 914 # if LDAP_SET_REBIND_PROC_ARGS == 2
 915 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 916                        int *method, int freeit )
 917 {
 918         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 919
 920         return rebindproc_with_state(ldap_struct, whop, credp,
 921                                      method, freeit, ldap_state);
 922
 923 }
 924 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 925 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 926
 927 /*******************************************************************
 928  a rebind function for authenticated referrals
 929  this also does the connection, but no void*.
 930 ******************************************************************/
 931 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 932 # if LDAP_SET_REBIND_PROC_ARGS == 2
 933 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 934                                ber_int_t msgid)
 935 {
 936         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 937
 938         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 939                                              ldap_state);
 940 }
 941 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 942 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 943
 944 /*******************************************************************
 945  connect to the ldap server under system privilege.
 946 ******************************************************************/
 947 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 948 {
 949         int rc;
 950         int version;
 951
 952         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
 953
 954                 /* get the default dn and password only if they are not set already */
 955                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
 956                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 957                         return LDAP_INVALID_CREDENTIALS;
 958                 }
 959         }
 960
 961         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 962            (OpenLDAP) doesnt' seem to support it */
 963
 964         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 965                   ldap_state->uri, ldap_state->bind_dn));
 966
 967 #ifdef HAVE_LDAP_SET_REBIND_PROC
 968 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 969 # if LDAP_SET_REBIND_PROC_ARGS == 2
 970         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 971 # endif
 972 # if LDAP_SET_REBIND_PROC_ARGS == 3
 973         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 974 # endif
 975 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 976 # if LDAP_SET_REBIND_PROC_ARGS == 2
 977         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 978 # endif
 979 # if LDAP_SET_REBIND_PROC_ARGS == 3
 980         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 981 # endif
 982 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 983 #endif
 984
 985         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 986
 987         if (rc != LDAP_SUCCESS) {
 988                 char *ld_error = NULL;
 989                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 990                                 &ld_error);
 991                 DEBUG(ldap_state->num_failures ? 2 : 0,
 992                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
 993                                ldap_state->uri,
 994                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
 995                                ldap_err2string(rc),
 996                                ld_error ? ld_error : "(unknown)"));
 997                 SAFE_FREE(ld_error);
 998                 ldap_state->num_failures++;
 999                 return rc;
1000         }
1001
1002         ldap_state->num_failures = 0;
1003         ldap_state->paged_results = False;
1004
1005         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1006
1007         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1008                 ldap_state->paged_results = True;
1009         }
1010
1011         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1012         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1013                 ldap_state->paged_results ? "does" : "does not"));
1014         return rc;
1015 }
1016
1017 static void smbldap_idle_fn(struct event_context *event_ctx,
1018                             struct timed_event *te,
1019                             struct timeval now,
1020                             void *private_data);
1021
1022 /**********************************************************************
1023  Connect to LDAP server (called before every ldap operation)
1024 *********************************************************************/
1025 static int smbldap_open(struct smbldap_state *ldap_state)
1026 {
1027         int rc, opt_rc;
1028         bool reopen = False;
1029         SMB_ASSERT(ldap_state);
1030
1031         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1032
1033 #ifdef HAVE_UNIXSOCKET
1034                 struct sockaddr_un addr;
1035 #else
1036                 struct sockaddr addr;
1037 #endif
1038                 socklen_t len = sizeof(addr);
1039                 int sd;
1040
1041                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1042                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1043                         reopen = True;
1044
1045 #ifdef HAVE_UNIXSOCKET
1046                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1047                         reopen = True;
1048 #endif
1049                 if (reopen) {
1050                         /* the other end has died. reopen. */
1051                         ldap_unbind(ldap_state->ldap_struct);
1052                         ldap_state->ldap_struct = NULL;
1053                         ldap_state->last_ping = (time_t)0;
1054                 } else {
1055                         ldap_state->last_ping = time(NULL);
1056                 }
1057         }
1058
1059         if (ldap_state->ldap_struct != NULL) {
1060                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1061                 return LDAP_SUCCESS;
1062         }
1063
1064         if ((rc = smbldap_open_connection(ldap_state))) {
1065                 return rc;
1066         }
1067
1068         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1069                 ldap_unbind(ldap_state->ldap_struct);
1070                 ldap_state->ldap_struct = NULL;
1071                 return rc;
1072         }
1073
1074
1075         ldap_state->last_ping = time(NULL);
1076         ldap_state->pid = sys_getpid();
1077
1078         TALLOC_FREE(ldap_state->idle_event);
1079
1080         if (ldap_state->event_context != NULL) {
1081                 ldap_state->idle_event = event_add_timed(
1082                         ldap_state->event_context, NULL,
1083                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1084                         smbldap_idle_fn, ldap_state);
1085         }
1086
1087         DEBUG(4,("The LDAP server is successfully connected\n"));
1088
1089         return LDAP_SUCCESS;
1090 }
1091
1092 /**********************************************************************
1093 Disconnect from LDAP server
1094 *********************************************************************/
1095 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1096 {
1097         if (!ldap_state)
1098                 return NT_STATUS_INVALID_PARAMETER;
1099
1100         if (ldap_state->ldap_struct != NULL) {
1101                 ldap_unbind(ldap_state->ldap_struct);
1102                 ldap_state->ldap_struct = NULL;
1103         }
1104
1105         smbldap_delete_state(ldap_state);
1106
1107         DEBUG(5,("The connection to the LDAP server was closed\n"));
1108         /* maybe free the results here --metze */
1109
1110         return NT_STATUS_OK;
1111 }
1112
1113 static bool got_alarm;
1114
1115 static void (*old_handler)(int);
1116
1117 static void gotalarm_sig(int dummy)
1118 {
1119         got_alarm = True;
1120 }
1121
1122 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1123                             int *attempts, time_t endtime)
1124 {
1125         time_t now = time(NULL);
1126         int open_rc = LDAP_SERVER_DOWN;
1127
1128         if (*rc != LDAP_SERVER_DOWN)
1129                 goto no_next;
1130
1131         if (now >= endtime) {
1132                 smbldap_close(ldap_state);
1133                 *rc = LDAP_TIMEOUT;
1134                 goto no_next;
1135         }
1136
1137         if (*attempts == 0) {
1138                 got_alarm = False;
1139                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1140                 alarm(endtime - now);
1141
1142                 if (ldap_state->pid != sys_getpid())
1143                         smbldap_close(ldap_state);
1144         }
1145
1146         while (1) {
1147
1148                 if (*attempts != 0)
1149                         smb_msleep(1000);
1150
1151                 *attempts += 1;
1152
1153                 open_rc = smbldap_open(ldap_state);
1154
1155                 if (open_rc == LDAP_SUCCESS) {
1156                         ldap_state->last_use = now;
1157                         return True;
1158                 }
1159
1160                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1161                         /* The fact that we are non-root or any other
1162                          * access-denied condition will not change in the next
1163                          * round of trying */
1164                         *rc = open_rc;
1165                         break;
1166                 }
1167
1168                 if (got_alarm) {
1169                         *rc = LDAP_TIMEOUT;
1170                         break;
1171                 }
1172
1173                 if (open_rc != LDAP_SUCCESS) {
1174                         DEBUG(1, ("Connection to LDAP server failed for the "
1175                                   "%d try!\n", *attempts));
1176                 }
1177         }
1178
1179  no_next:
1180         CatchSignal(SIGALRM, old_handler);
1181         alarm(0);
1182         ldap_state->last_use = now;
1183         return False;
1184 }
1185
1186 /*********************************************************************
1187  ********************************************************************/
1188
1189 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1190                               const char *base, int scope, const char *filter,
1191                               const char *attrs[], int attrsonly,
1192                               LDAPControl **sctrls, LDAPControl **cctrls,
1193                               int sizelimit, LDAPMessage **res)
1194 {
1195         int             rc = LDAP_SERVER_DOWN;
1196         int             attempts = 0;
1197         char           *utf8_filter;
1198         time_t          endtime = time(NULL)+lp_ldap_timeout();
1199         struct          timeval timeout;
1200         size_t          converted_size;
1201
1202         SMB_ASSERT(ldap_state);
1203
1204         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1205                  "scope => [%d]\n", base, filter, scope));
1206
1207         if (ldap_state->last_rebind.tv_sec > 0) {
1208                 struct timeval  tval;
1209                 int64_t tdiff = 0;
1210                 int             sleep_time = 0;
1211
1212                 ZERO_STRUCT(tval);
1213                 GetTimeOfDay(&tval);
1214
1215                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1216                 tdiff /= 1000; /* Convert to milliseconds. */
1217
1218                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1219                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1220
1221                 if (sleep_time > 0) {
1222                         /* we wait for the LDAP replication */
1223                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1224                                  "for LDAP replication.\n",sleep_time));
1225                         smb_msleep(sleep_time);
1226                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1227                 }
1228                 ZERO_STRUCT(ldap_state->last_rebind);
1229         }
1230
1231         if (!push_utf8_allocate(&utf8_filter, filter, &converted_size)) {
1232                 return LDAP_NO_MEMORY;
1233         }
1234
1235         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1236         timeout.tv_sec = lp_ldap_timeout();
1237         timeout.tv_usec = 0;
1238
1239         /* Setup alarm timeout.... Do we need both of these ? JRA.
1240          * Yes, I think we do need both of these. The server timeout only
1241          * covers the case where the server's operation takes too long. It
1242          * does not cover the case where the request hangs on its way to the
1243          * server. The server side timeout is not strictly necessary, it's
1244          * just a bit more kind to the server. VL. */
1245
1246         got_alarm = 0;
1247         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1248         alarm(lp_ldap_timeout());
1249         /* End setup timeout. */
1250
1251         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1252                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1253                                        utf8_filter,
1254                                        CONST_DISCARD(char **, attrs),
1255                                        attrsonly, sctrls, cctrls, &timeout,
1256                                        sizelimit, res);
1257                 if (rc != LDAP_SUCCESS) {
1258                         char *ld_error = NULL;
1259                         int ld_errno;
1260
1261                         ldap_get_option(ldap_state->ldap_struct,
1262                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1263
1264                         ldap_get_option(ldap_state->ldap_struct,
1265                                         LDAP_OPT_ERROR_STRING, &ld_error);
1266                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1267                                    "(%s)\n", base, ld_errno,
1268                                    ldap_err2string(rc),
1269                                    ld_error ? ld_error : "unknown"));
1270                         SAFE_FREE(ld_error);
1271
1272                         if (ld_errno == LDAP_SERVER_DOWN) {
1273                                 ldap_unbind(ldap_state->ldap_struct);
1274                                 ldap_state->ldap_struct = NULL;
1275                         }
1276                 }
1277         }
1278
1279         SAFE_FREE(utf8_filter);
1280
1281         /* Teardown timeout. */
1282         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1283         alarm(0);
1284
1285         if (got_alarm != 0)
1286                 return LDAP_TIMELIMIT_EXCEEDED;
1287
1288         return rc;
1289 }
1290
1291 int smbldap_search(struct smbldap_state *ldap_state,
1292                    const char *base, int scope, const char *filter,
1293                    const char *attrs[], int attrsonly,
1294                    LDAPMessage **res)
1295 {
1296         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1297                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1298 }
1299
1300 int smbldap_search_paged(struct smbldap_state *ldap_state,
1301                          const char *base, int scope, const char *filter,
1302                          const char **attrs, int attrsonly, int pagesize,
1303                          LDAPMessage **res, void **cookie)
1304 {
1305         LDAPControl     pr;
1306         LDAPControl     **rcontrols;
1307         LDAPControl     *controls[2] = { NULL, NULL};
1308         BerElement      *cookie_be = NULL;
1309         struct berval   *cookie_bv = NULL;
1310         int             tmp = 0, i, rc;
1311         bool            critical = True;
1312
1313         *res = NULL;
1314
1315         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1316                  "scope => [%d], pagesize => [%d]\n",
1317                  base, filter, scope, pagesize));
1318
1319         cookie_be = ber_alloc_t(LBER_USE_DER);
1320         if (cookie_be == NULL) {
1321                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1322                          "NULL\n"));
1323                 return LDAP_NO_MEMORY;
1324         }
1325
1326         /* construct cookie */
1327         if (*cookie != NULL) {
1328                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1329                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1330                 *cookie = NULL;
1331         } else {
1332                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1333         }
1334         ber_flatten(cookie_be, &cookie_bv);
1335
1336         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1337         pr.ldctl_iscritical = (char) critical;
1338         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1339         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1340
1341         controls[0] = &pr;
1342         controls[1] = NULL;
1343
1344         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1345                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1346
1347         ber_free(cookie_be, 1);
1348         ber_bvfree(cookie_bv);
1349
1350         if (rc != 0) {
1351                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1352                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1353                 goto done;
1354         }
1355
1356         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1357
1358         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1359                                NULL, NULL, &rcontrols,  0);
1360         if (rc != 0) {
1361                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1362                          "with [%s]\n", ldap_err2string(rc)));
1363                 goto done;
1364         }
1365
1366         if (rcontrols == NULL)
1367                 goto done;
1368
1369         for (i=0; rcontrols[i]; i++) {
1370
1371                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1372                         continue;
1373
1374                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1375                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1376                 /* the berval is the cookie, but must be freed when it is all
1377                    done */
1378                 if (cookie_bv->bv_len)
1379                         *cookie=ber_bvdup(cookie_bv);
1380                 else
1381                         *cookie=NULL;
1382                 ber_bvfree(cookie_bv);
1383                 ber_free(cookie_be, 1);
1384                 break;
1385         }
1386         ldap_controls_free(rcontrols);
1387 done:
1388         return rc;
1389 }
1390
1391 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1392 {
1393         int             rc = LDAP_SERVER_DOWN;
1394         int             attempts = 0;
1395         char           *utf8_dn;
1396         time_t          endtime = time(NULL)+lp_ldap_timeout();
1397         size_t          converted_size;
1398
1399         SMB_ASSERT(ldap_state);
1400
1401         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1402
1403         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1404                 return LDAP_NO_MEMORY;
1405         }
1406
1407         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1408                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1409                 if (rc != LDAP_SUCCESS) {
1410                         char *ld_error = NULL;
1411                         int ld_errno;
1412
1413                         ldap_get_option(ldap_state->ldap_struct,
1414                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1415
1416                         ldap_get_option(ldap_state->ldap_struct,
1417                                         LDAP_OPT_ERROR_STRING, &ld_error);
1418                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1419                                    "(%s)\n", dn, ld_errno,
1420                                    ldap_err2string(rc),
1421                                    ld_error ? ld_error : "unknown"));
1422                         SAFE_FREE(ld_error);
1423
1424                         if (ld_errno == LDAP_SERVER_DOWN) {
1425                                 ldap_unbind(ldap_state->ldap_struct);
1426                                 ldap_state->ldap_struct = NULL;
1427                         }
1428                 }
1429         }
1430
1431         SAFE_FREE(utf8_dn);
1432         return rc;
1433 }
1434
1435 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1436 {
1437         int             rc = LDAP_SERVER_DOWN;
1438         int             attempts = 0;
1439         char           *utf8_dn;
1440         time_t          endtime = time(NULL)+lp_ldap_timeout();
1441         size_t          converted_size;
1442
1443         SMB_ASSERT(ldap_state);
1444
1445         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1446
1447         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1448                 return LDAP_NO_MEMORY;
1449         }
1450
1451         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1452                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1453                 if (rc != LDAP_SUCCESS) {
1454                         char *ld_error = NULL;
1455                         int ld_errno;
1456
1457                         ldap_get_option(ldap_state->ldap_struct,
1458                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1459
1460                         ldap_get_option(ldap_state->ldap_struct,
1461                                         LDAP_OPT_ERROR_STRING, &ld_error);
1462                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1463                                    "(%s)\n", dn, ld_errno,
1464                                    ldap_err2string(rc),
1465                                    ld_error ? ld_error : "unknown"));
1466                         SAFE_FREE(ld_error);
1467
1468                         if (ld_errno == LDAP_SERVER_DOWN) {
1469                                 ldap_unbind(ldap_state->ldap_struct);
1470                                 ldap_state->ldap_struct = NULL;
1471                         }
1472                 }
1473         }
1474
1475         SAFE_FREE(utf8_dn);
1476         return rc;
1477 }
1478
1479 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1480 {
1481         int             rc = LDAP_SERVER_DOWN;
1482         int             attempts = 0;
1483         char           *utf8_dn;
1484         time_t          endtime = time(NULL)+lp_ldap_timeout();
1485         size_t          converted_size;
1486
1487         SMB_ASSERT(ldap_state);
1488
1489         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1490
1491         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1492                 return LDAP_NO_MEMORY;
1493         }
1494
1495         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1496                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1497                 if (rc != LDAP_SUCCESS) {
1498                         char *ld_error = NULL;
1499                         int ld_errno;
1500
1501                         ldap_get_option(ldap_state->ldap_struct,
1502                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1503
1504                         ldap_get_option(ldap_state->ldap_struct,
1505                                         LDAP_OPT_ERROR_STRING, &ld_error);
1506                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1507                                    "(%s)\n", dn, ld_errno,
1508                                    ldap_err2string(rc),
1509                                    ld_error ? ld_error : "unknown"));
1510                         SAFE_FREE(ld_error);
1511
1512                         if (ld_errno == LDAP_SERVER_DOWN) {
1513                                 ldap_unbind(ldap_state->ldap_struct);
1514                                 ldap_state->ldap_struct = NULL;
1515                         }
1516                 }
1517         }
1518
1519         SAFE_FREE(utf8_dn);
1520         return rc;
1521 }
1522
1523 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1524                                LDAP_CONST char *reqoid, struct berval *reqdata,
1525                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1526                                char **retoidp, struct berval **retdatap)
1527 {
1528         int             rc = LDAP_SERVER_DOWN;
1529         int             attempts = 0;
1530         time_t          endtime = time(NULL)+lp_ldap_timeout();
1531
1532         if (!ldap_state)
1533                 return (-1);
1534
1535         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1536                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1537                                                reqdata, serverctrls,
1538                                                clientctrls, retoidp, retdatap);
1539                 if (rc != LDAP_SUCCESS) {
1540                         char *ld_error = NULL;
1541                         int ld_errno;
1542
1543                         ldap_get_option(ldap_state->ldap_struct,
1544                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1545
1546                         ldap_get_option(ldap_state->ldap_struct,
1547                                         LDAP_OPT_ERROR_STRING, &ld_error);
1548                         DEBUG(10, ("Extended operation failed with error: "
1549                                    "%d (%s) (%s)\n", ld_errno,
1550                                    ldap_err2string(rc),
1551                                    ld_error ? ld_error : "unknown"));
1552                         SAFE_FREE(ld_error);
1553
1554                         if (ld_errno == LDAP_SERVER_DOWN) {
1555                                 ldap_unbind(ldap_state->ldap_struct);
1556                                 ldap_state->ldap_struct = NULL;
1557                         }
1558                 }
1559         }
1560
1561         return rc;
1562 }
1563
1564 /*******************************************************************
1565  run the search by name.
1566 ******************************************************************/
1567 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1568                            const char *filter, const char **search_attr,
1569                            LDAPMessage ** result)
1570 {
1571         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1572                               filter, search_attr, 0, result);
1573 }
1574
1575 static void smbldap_idle_fn(struct event_context *event_ctx,
1576                             struct timed_event *te,
1577                             struct timeval now,
1578                             void *private_data)
1579 {
1580         struct smbldap_state *state = (struct smbldap_state *)private_data;
1581
1582         TALLOC_FREE(state->idle_event);
1583
1584         if (state->ldap_struct == NULL) {
1585                 DEBUG(10,("ldap connection not connected...\n"));
1586                 return;
1587         }
1588
1589         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1590                 DEBUG(10,("ldap connection not idle...\n"));
1591
1592                 state->idle_event = event_add_timed(
1593                         event_ctx, NULL,
1594                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1595                         smbldap_idle_fn,
1596                         private_data);
1597                 return;
1598         }
1599
1600         DEBUG(7,("ldap connection idle...closing connection\n"));
1601         smbldap_close(state);
1602 }
1603
1604 /**********************************************************************
1605  Housekeeping
1606  *********************************************************************/
1607
1608 void smbldap_free_struct(struct smbldap_state **ldap_state)
1609 {
1610         smbldap_close(*ldap_state);
1611
1612         if ((*ldap_state)->bind_secret) {
1613                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1614         }
1615
1616         SAFE_FREE((*ldap_state)->bind_dn);
1617         SAFE_FREE((*ldap_state)->bind_secret);
1618
1619         TALLOC_FREE((*ldap_state)->idle_event);
1620
1621         *ldap_state = NULL;
1622
1623         /* No need to free any further, as it is talloc()ed */
1624 }
1625
1626
1627 /**********************************************************************
1628  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1629  *********************************************************************/
1630
1631 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1632                       const char *location,
1633                       struct smbldap_state **smbldap_state)
1634 {
1635         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1636         if (!*smbldap_state) {
1637                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1638                 return NT_STATUS_NO_MEMORY;
1639         }
1640
1641         if (location) {
1642                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1643         } else {
1644                 (*smbldap_state)->uri = "ldap://localhost";
1645         }
1646
1647         (*smbldap_state)->event_context = event_ctx;
1648
1649         return NT_STATUS_OK;
1650 }
1651
1652 /*******************************************************************
1653  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1654 ********************************************************************/
1655 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1656 {
1657         char *utf8_dn, *unix_dn;
1658         size_t converted_size;
1659
1660         utf8_dn = ldap_get_dn(ld, entry);
1661         if (!utf8_dn) {
1662                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1663                 return NULL;
1664         }
1665         if (!pull_utf8_allocate(&unix_dn, utf8_dn, &converted_size)) {
1666                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1667                            "[%s]\n", utf8_dn));
1668                 return NULL;
1669         }
1670         ldap_memfree(utf8_dn);
1671         return unix_dn;
1672 }
1673
1674  const char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1675                                LDAPMessage *entry)
1676 {
1677         char *utf8_dn, *unix_dn;
1678         size_t converted_size;
1679
1680         utf8_dn = ldap_get_dn(ld, entry);
1681         if (!utf8_dn) {
1682                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1683                 return NULL;
1684         }
1685         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1686                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1687                            "[%s]\n", utf8_dn));
1688                 return NULL;
1689         }
1690         ldap_memfree(utf8_dn);
1691         return unix_dn;
1692 }
1693
1694 /*******************************************************************
1695  Check if root-dse has a certain Control or Extension
1696 ********************************************************************/
1697
1698 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1699 {
1700         LDAPMessage *msg = NULL;
1701         LDAPMessage *entry = NULL;
1702         char **values = NULL;
1703         int rc, num_result, num_values, i;
1704         bool result = False;
1705
1706         if (!attrs[0]) {
1707                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1708                 return False;
1709         }
1710
1711         if (!strequal(attrs[0], "supportedExtension") &&
1712             !strequal(attrs[0], "supportedControl") &&
1713             !strequal(attrs[0], "namingContexts")) {
1714                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1715                 return False;
1716         }
1717
1718         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1719                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1720
1721         if (rc != LDAP_SUCCESS) {
1722                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1723                 return False;
1724         }
1725
1726         num_result = ldap_count_entries(ld, msg);
1727
1728         if (num_result != 1) {
1729                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1730                 goto done;
1731         }
1732
1733         entry = ldap_first_entry(ld, msg);
1734
1735         if (entry == NULL) {
1736                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1737                 goto done;
1738         }
1739
1740         values = ldap_get_values(ld, entry, attrs[0]);
1741
1742         if (values == NULL) {
1743                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1744                 goto done;
1745         }
1746
1747         num_values = ldap_count_values(values);
1748
1749         if (num_values == 0) {
1750                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1751                 goto done;
1752         }
1753
1754         for (i=0; i<num_values; i++) {
1755                 if (strcmp(values[i], value) == 0)
1756                         result = True;
1757         }
1758
1759
1760  done:
1761         if (values != NULL)
1762                 ldap_value_free(values);
1763         if (msg != NULL)
1764                 ldap_msgfree(msg);
1765
1766         return result;
1767
1768 }
1769
1770 /*******************************************************************
1771  Check if LDAP-Server supports a certain Control (OID in string format)
1772 ********************************************************************/
1773
1774 bool smbldap_has_control(LDAP *ld, const char *control)
1775 {
1776         const char *attrs[] = { "supportedControl", NULL };
1777         return smbldap_check_root_dse(ld, attrs, control);
1778 }
1779
1780 /*******************************************************************
1781  Check if LDAP-Server supports a certain Extension (OID in string format)
1782 ********************************************************************/
1783
1784 bool smbldap_has_extension(LDAP *ld, const char *extension)
1785 {
1786         const char *attrs[] = { "supportedExtension", NULL };
1787         return smbldap_check_root_dse(ld, attrs, extension);
1788 }
1789
1790 /*******************************************************************
1791  Check if LDAP-Server holds a given namingContext
1792 ********************************************************************/
1793
1794 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1795 {
1796         const char *attrs[] = { "namingContexts", NULL };
1797         return smbldap_check_root_dse(ld, attrs, naming_context);
1798 }
1799
1800 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1801 {
1802         ldap_state->anonymous = anon;
1803
1804         /* free any previously set credential */
1805
1806         SAFE_FREE(ldap_state->bind_dn);
1807         if (ldap_state->bind_secret) {
1808                 /* make sure secrets are zeroed out of memory */
1809                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1810                 SAFE_FREE(ldap_state->bind_secret);
1811         }
1812
1813         if ( ! anon) {
1814                 ldap_state->bind_dn = SMB_STRDUP(dn);
1815                 ldap_state->bind_secret = SMB_STRDUP(secret);
1816         }
1817
1818         return True;
1819 }