source3/lib/smbldap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    LDAP protocol helper functions for SAMBA
   4    Copyright (C) Jean François Micouleau       1998
   5    Copyright (C) Gerald Carter                  2001-2003
   6    Copyright (C) Shahms King                    2001
   7    Copyright (C) Andrew Bartlett                2002-2003
   8    Copyright (C) Stefan (metze) Metzmacher      2002-2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 */
  24
  25 #include "includes.h"
  26 #include "smbldap.h"
  27 #include "secrets.h"
  28 #include "../libcli/security/security.h"
  29
  30 /* Try not to hit the up or down server forever */
  31
  32 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  33 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  34
  35 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  36
  37
  38 /* attributes used by Samba 2.2 */
  39
  40 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  41         { LDAP_ATTR_UID,                "uid"           },
  42         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  43         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  44         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  45         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  46         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  47         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  48         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  49         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  50         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  51         { LDAP_ATTR_CN,                 "cn"            },
  52         { LDAP_ATTR_SN,                 "sn"            },
  53         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  54         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  55         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  56         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  57         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  58         { LDAP_ATTR_DESC,               "description"   },
  59         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  60         { LDAP_ATTR_USER_RID,           "rid"           },
  61         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  62         { LDAP_ATTR_LMPW,               "lmPassword"    },
  63         { LDAP_ATTR_NTPW,               "ntPassword"    },
  64         { LDAP_ATTR_DOMAIN,             "domain"        },
  65         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  66         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  67         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  68         { LDAP_ATTR_LIST_END,           NULL            }
  69 };
  70
  71 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  72         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  73         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  74         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  75         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  76         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  77         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  78         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  79         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  80         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  81         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  82         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  83         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  84         { LDAP_ATTR_USER_RID,           "rid"           },
  85         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  86         { LDAP_ATTR_LMPW,               "lmPassword"    },
  87         { LDAP_ATTR_NTPW,               "ntPassword"    },
  88         { LDAP_ATTR_DOMAIN,             "domain"        },
  89         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  90         { LDAP_ATTR_LIST_END,           NULL            }
  91 };
  92
  93 /* attributes used by Samba 3.0's sambaSamAccount */
  94
  95 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  96         { LDAP_ATTR_UID,                "uid"                   },
  97         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  98         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  99         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
 100         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 101         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 102         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 103         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 104         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 105         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 106         { LDAP_ATTR_CN,                 "cn"                    },
 107         { LDAP_ATTR_SN,                 "sn"                    },
 108         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 109         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 110         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 111         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 112         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 113         { LDAP_ATTR_DESC,               "description"           },
 114         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 115         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 116         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 117         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 118         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 119         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 120         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 121         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 122         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 123         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 124         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 125         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 126         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 127         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 128         { LDAP_ATTR_LIST_END,           NULL                    }
 129 };
 130
 131 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 132         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 133         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 134         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 135         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 136         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 137         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 138         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 139         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 140         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 141         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 142         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 143         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 144         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 145         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 146         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 147         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 148         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 149         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 150         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 151         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 152         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 153         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 154         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 155         { LDAP_ATTR_LIST_END,           NULL                    }
 156 };
 157
 158 /* attributes used for allocating RIDs */
 159
 160 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 161         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 162         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 163         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 164         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 165         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 166         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 167         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 168         { LDAP_ATTR_LIST_END,           NULL                    },
 169 };
 170
 171 /* Samba 3.0 group mapping attributes */
 172
 173 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 174         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 175         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 176         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 177         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 178         { LDAP_ATTR_DESC,               "description"           },
 179         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 180         { LDAP_ATTR_CN,                 "cn"                    },
 181         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 182         { LDAP_ATTR_LIST_END,           NULL                    }
 183 };
 184
 185 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 186         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 187         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 188         { LDAP_ATTR_DESC,               "description"           },
 189         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 190         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 191         { LDAP_ATTR_LIST_END,           NULL                    }
 192 };
 193
 194 /* idmap_ldap sambaUnixIdPool */
 195
 196 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 197         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 198         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 199         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 200         { LDAP_ATTR_LIST_END,           NULL                    }
 201 };
 202
 203 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 204         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 205         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 206         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 207         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 208         { LDAP_ATTR_LIST_END,           NULL                    }
 209 };
 210
 211 /**********************************************************************
 212  perform a simple table lookup and return the attribute name
 213  **********************************************************************/
 214
 215  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 216 {
 217         int i = 0;
 218
 219         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 220                 if ( table[i].attrib == key )
 221                         return table[i].name;
 222                 i++;
 223         }
 224
 225         return NULL;
 226 }
 227
 228
 229 /**********************************************************************
 230  Return the list of attribute names from a mapping table
 231  **********************************************************************/
 232
 233  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 234 {
 235         const char **names;
 236         int i = 0;
 237
 238         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 239                 i++;
 240         i++;
 241
 242         names = talloc_array( mem_ctx, const char*, i );
 243         if ( !names ) {
 244                 DEBUG(0,("get_attr_list: out of memory\n"));
 245                 return NULL;
 246         }
 247
 248         i = 0;
 249         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 250                 names[i] = talloc_strdup( names, table[i].name );
 251                 i++;
 252         }
 253         names[i] = NULL;
 254
 255         return names;
 256 }
 257
 258 /*******************************************************************
 259  Search an attribute and return the first value found.
 260 ******************************************************************/
 261
 262  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 263                                     const char *attribute, char *value,
 264                                     int max_len)
 265 {
 266         char **values;
 267         size_t size = 0;
 268
 269         if ( !attribute )
 270                 return False;
 271
 272         value[0] = '\0';
 273
 274         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 275                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 276
 277                 return False;
 278         }
 279
 280         if (!convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, &size)) {
 281                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 282                           attribute, values[0]));
 283                 ldap_value_free(values);
 284                 return False;
 285         }
 286
 287         ldap_value_free(values);
 288 #ifdef DEBUG_PASSWORDS
 289         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 290 #endif
 291         return True;
 292 }
 293
 294  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 295                                         const char *attribute,
 296                                         TALLOC_CTX *mem_ctx)
 297 {
 298         char **values;
 299         char *result;
 300         size_t converted_size;
 301
 302         if (attribute == NULL) {
 303                 return NULL;
 304         }
 305
 306         values = ldap_get_values(ldap_struct, entry, attribute);
 307
 308         if (values == NULL) {
 309                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 310                 return NULL;
 311         }
 312
 313         if (ldap_count_values(values) != 1) {
 314                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 315                            attribute, ldap_count_values(values)));
 316                 ldap_value_free(values);
 317                 return NULL;
 318         }
 319
 320         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 321                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 322                 ldap_value_free(values);
 323                 return NULL;
 324         }
 325
 326         ldap_value_free(values);
 327
 328 #ifdef DEBUG_PASSWORDS
 329         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 330                      attribute, result));
 331 #endif
 332         return result;
 333 }
 334
 335  char * smbldap_talloc_first_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 336                                        const char *attribute,
 337                                        TALLOC_CTX *mem_ctx)
 338 {
 339         char **values;
 340         char *result;
 341         size_t converted_size;
 342
 343         if (attribute == NULL) {
 344                 return NULL;
 345         }
 346
 347         values = ldap_get_values(ldap_struct, entry, attribute);
 348
 349         if (values == NULL) {
 350                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 351                 return NULL;
 352         }
 353
 354         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 355                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 356                 ldap_value_free(values);
 357                 return NULL;
 358         }
 359
 360         ldap_value_free(values);
 361
 362 #ifdef DEBUG_PASSWORDS
 363         DEBUG (100, ("smbldap_get_first_attribute: [%s] = [%s]\n",
 364                      attribute, result));
 365 #endif
 366         return result;
 367 }
 368
 369  char * smbldap_talloc_smallest_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 370                                           const char *attribute,
 371                                           TALLOC_CTX *mem_ctx)
 372 {
 373         char **values;
 374         char *result;
 375         size_t converted_size;
 376         int i, num_values;
 377
 378         if (attribute == NULL) {
 379                 return NULL;
 380         }
 381
 382         values = ldap_get_values(ldap_struct, entry, attribute);
 383
 384         if (values == NULL) {
 385                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 386                 return NULL;
 387         }
 388
 389         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 390                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 391                 ldap_value_free(values);
 392                 return NULL;
 393         }
 394
 395         num_values = ldap_count_values(values);
 396
 397         for (i=1; i<num_values; i++) {
 398                 char *tmp;
 399
 400                 if (!pull_utf8_talloc(mem_ctx, &tmp, values[i],
 401                                       &converted_size)) {
 402                         DEBUG(10, ("pull_utf8_talloc failed\n"));
 403                         TALLOC_FREE(result);
 404                         ldap_value_free(values);
 405                         return NULL;
 406                 }
 407
 408                 if (strcasecmp_m(tmp, result) < 0) {
 409                         TALLOC_FREE(result);
 410                         result = tmp;
 411                 } else {
 412                         TALLOC_FREE(tmp);
 413                 }
 414         }
 415
 416         ldap_value_free(values);
 417
 418 #ifdef DEBUG_PASSWORDS
 419         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 420                      attribute, result));
 421 #endif
 422         return result;
 423 }
 424
 425  bool smbldap_talloc_single_blob(TALLOC_CTX *mem_ctx, LDAP *ld,
 426                                  LDAPMessage *msg, const char *attrib,
 427                                  DATA_BLOB *blob)
 428 {
 429         struct berval **values;
 430
 431         values = ldap_get_values_len(ld, msg, attrib);
 432         if (!values) {
 433                 return false;
 434         }
 435
 436         if (ldap_count_values_len(values) != 1) {
 437                 DEBUG(10, ("Expected one value for %s, got %d\n", attrib,
 438                            ldap_count_values_len(values)));
 439                 return false;
 440         }
 441
 442         *blob = data_blob_talloc(mem_ctx, values[0]->bv_val,
 443                                  values[0]->bv_len);
 444         ldap_value_free_len(values);
 445
 446         return (blob->data != NULL);
 447 }
 448
 449  bool smbldap_pull_sid(LDAP *ld, LDAPMessage *msg, const char *attrib,
 450                        struct dom_sid *sid)
 451 {
 452         DATA_BLOB blob;
 453         bool ret;
 454
 455         if (!smbldap_talloc_single_blob(talloc_tos(), ld, msg, attrib,
 456                                         &blob)) {
 457                 return false;
 458         }
 459         ret = sid_parse((char *)blob.data, blob.length, sid);
 460         TALLOC_FREE(blob.data);
 461         return ret;
 462 }
 463
 464  static int ldapmsg_destructor(LDAPMessage **result) {
 465         ldap_msgfree(*result);
 466         return 0;
 467 }
 468
 469  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 470 {
 471         LDAPMessage **handle;
 472
 473         if (result == NULL) {
 474                 return;
 475         }
 476
 477         handle = talloc(mem_ctx, LDAPMessage *);
 478         SMB_ASSERT(handle != NULL);
 479
 480         *handle = result;
 481         talloc_set_destructor(handle, ldapmsg_destructor);
 482 }
 483
 484  static int ldapmod_destructor(LDAPMod ***mod) {
 485         ldap_mods_free(*mod, True);
 486         return 0;
 487 }
 488
 489  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 490 {
 491         LDAPMod ***handle;
 492
 493         if (mod == NULL) {
 494                 return;
 495         }
 496
 497         handle = talloc(mem_ctx, LDAPMod **);
 498         SMB_ASSERT(handle != NULL);
 499
 500         *handle = mod;
 501         talloc_set_destructor(handle, ldapmod_destructor);
 502 }
 503
 504 /************************************************************************
 505  Routine to manage the LDAPMod structure array
 506  manage memory used by the array, by each struct, and values
 507  ***********************************************************************/
 508
 509 static void smbldap_set_mod_internal(LDAPMod *** modlist, int modop, const char *attribute, const char *value, const DATA_BLOB *blob)
 510 {
 511         LDAPMod **mods;
 512         int i;
 513         int j;
 514
 515         mods = *modlist;
 516
 517         /* sanity checks on the mod values */
 518
 519         if (attribute == NULL || *attribute == '\0') {
 520                 return;
 521         }
 522
 523 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 524            left here so other do not re-add similar code   --jerry */
 525         if (value == NULL || *value == '\0')
 526                 return;
 527 #endif
 528
 529         if (mods == NULL) {
 530                 mods = SMB_MALLOC_P(LDAPMod *);
 531                 if (mods == NULL) {
 532                         smb_panic("smbldap_set_mod: out of memory!");
 533                         /* notreached. */
 534                 }
 535                 mods[0] = NULL;
 536         }
 537
 538         for (i = 0; mods[i] != NULL; ++i) {
 539                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 540                         break;
 541         }
 542
 543         if (mods[i] == NULL) {
 544                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 545                 if (mods == NULL) {
 546                         smb_panic("smbldap_set_mod: out of memory!");
 547                         /* notreached. */
 548                 }
 549                 mods[i] = SMB_MALLOC_P(LDAPMod);
 550                 if (mods[i] == NULL) {
 551                         smb_panic("smbldap_set_mod: out of memory!");
 552                         /* notreached. */
 553                 }
 554                 mods[i]->mod_op = modop;
 555                 mods[i]->mod_values = NULL;
 556                 mods[i]->mod_type = SMB_STRDUP(attribute);
 557                 mods[i + 1] = NULL;
 558         }
 559
 560         if (blob && (modop & LDAP_MOD_BVALUES)) {
 561                 j = 0;
 562                 if (mods[i]->mod_bvalues != NULL) {
 563                         for (; mods[i]->mod_bvalues[j] != NULL; j++);
 564                 }
 565                 mods[i]->mod_bvalues = SMB_REALLOC_ARRAY(mods[i]->mod_bvalues, struct berval *, j + 2);
 566
 567                 if (mods[i]->mod_bvalues == NULL) {
 568                         smb_panic("smbldap_set_mod: out of memory!");
 569                         /* notreached. */
 570                 }
 571
 572                 mods[i]->mod_bvalues[j] = SMB_MALLOC_P(struct berval);
 573                 SMB_ASSERT(mods[i]->mod_bvalues[j] != NULL);
 574
 575                 mods[i]->mod_bvalues[j]->bv_val = (char *)memdup(blob->data, blob->length);
 576                 SMB_ASSERT(mods[i]->mod_bvalues[j]->bv_val != NULL);
 577                 mods[i]->mod_bvalues[j]->bv_len = blob->length;
 578
 579                 mods[i]->mod_bvalues[j + 1] = NULL;
 580         } else if (value != NULL) {
 581                 char *utf8_value = NULL;
 582                 size_t converted_size;
 583
 584                 j = 0;
 585                 if (mods[i]->mod_values != NULL) {
 586                         for (; mods[i]->mod_values[j] != NULL; j++);
 587                 }
 588                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 589
 590                 if (mods[i]->mod_values == NULL) {
 591                         smb_panic("smbldap_set_mod: out of memory!");
 592                         /* notreached. */
 593                 }
 594
 595                 if (!push_utf8_talloc(talloc_tos(), &utf8_value, value, &converted_size)) {
 596                         smb_panic("smbldap_set_mod: String conversion failure!");
 597                         /* notreached. */
 598                 }
 599
 600                 mods[i]->mod_values[j] = SMB_STRDUP(utf8_value);
 601                 TALLOC_FREE(utf8_value);
 602                 SMB_ASSERT(mods[i]->mod_values[j] != NULL);
 603
 604                 mods[i]->mod_values[j + 1] = NULL;
 605         }
 606         *modlist = mods;
 607 }
 608
 609  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 610 {
 611         smbldap_set_mod_internal(modlist, modop, attribute, value, NULL);
 612 }
 613
 614  void smbldap_set_mod_blob(LDAPMod *** modlist, int modop, const char *attribute, const DATA_BLOB *value)
 615 {
 616         smbldap_set_mod_internal(modlist, modop | LDAP_MOD_BVALUES, attribute, NULL, value);
 617 }
 618
 619 /**********************************************************************
 620   Set attribute to newval in LDAP, regardless of what value the
 621   attribute had in LDAP before.
 622 *********************************************************************/
 623
 624 static void smbldap_make_mod_internal(LDAP *ldap_struct, LDAPMessage *existing,
 625                                       LDAPMod ***mods,
 626                                       const char *attribute, int op,
 627                                       const char *newval,
 628                                       const DATA_BLOB *newblob)
 629 {
 630         char oldval[2048]; /* current largest allowed value is mungeddial */
 631         bool existed;
 632         DATA_BLOB oldblob = data_blob_null;
 633
 634         if (attribute == NULL) {
 635                 /* This can actually happen for ldapsam_compat where we for
 636                  * example don't have a password history */
 637                 return;
 638         }
 639
 640         if (existing != NULL) {
 641                 if (op & LDAP_MOD_BVALUES) {
 642                         existed = smbldap_talloc_single_blob(talloc_tos(), ldap_struct, existing, attribute, &oldblob);
 643                 } else {
 644                         existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 645                 }
 646         } else {
 647                 existed = False;
 648                 *oldval = '\0';
 649         }
 650
 651         if (existed) {
 652                 bool equal = false;
 653                 if (op & LDAP_MOD_BVALUES) {
 654                         equal = (newblob && (data_blob_cmp(&oldblob, newblob) == 0));
 655                 } else {
 656                         /* all of our string attributes are case insensitive */
 657                         equal = (newval && (strcasecmp_m(oldval, newval) == 0));
 658                 }
 659
 660                 if (equal) {
 661                         /* Believe it or not, but LDAP will deny a delete and
 662                            an add at the same time if the values are the
 663                            same... */
 664                         DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 665                         return;
 666                 }
 667
 668                 /* There has been no value before, so don't delete it.
 669                  * Here's a possible race: We might end up with
 670                  * duplicate attributes */
 671                 /* By deleting exactly the value we found in the entry this
 672                  * should be race-free in the sense that the LDAP-Server will
 673                  * deny the complete operation if somebody changed the
 674                  * attribute behind our back. */
 675                 /* This will also allow modifying single valued attributes
 676                  * in Novell NDS. In NDS you have to first remove attribute and then
 677                  * you could add new value */
 678
 679                 if (op & LDAP_MOD_BVALUES) {
 680                         DEBUG(10,("smbldap_make_mod: deleting attribute |%s| blob\n", attribute));
 681                         smbldap_set_mod_blob(mods, LDAP_MOD_DELETE, attribute, &oldblob);
 682                 } else {
 683                         DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 684                         smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 685                 }
 686         }
 687
 688         /* Regardless of the real operation (add or modify)
 689            we add the new value here. We rely on deleting
 690            the old value, should it exist. */
 691
 692         if (op & LDAP_MOD_BVALUES) {
 693                 if (newblob && newblob->length) {
 694                         DEBUG(10,("smbldap_make_mod: adding attribute |%s| blob\n", attribute));
 695                         smbldap_set_mod_blob(mods, LDAP_MOD_ADD, attribute, newblob);
 696                 }
 697         } else {
 698                 if ((newval != NULL) && (strlen(newval) > 0)) {
 699                         DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 700                         smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 701                 }
 702         }
 703 }
 704
 705  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 706                       LDAPMod ***mods,
 707                       const char *attribute, const char *newval)
 708 {
 709         smbldap_make_mod_internal(ldap_struct, existing, mods, attribute,
 710                                   0, newval, NULL);
 711 }
 712
 713  void smbldap_make_mod_blob(LDAP *ldap_struct, LDAPMessage *existing,
 714                             LDAPMod ***mods,
 715                             const char *attribute, const DATA_BLOB *newblob)
 716 {
 717         smbldap_make_mod_internal(ldap_struct, existing, mods, attribute,
 718                                   LDAP_MOD_BVALUES, NULL, newblob);
 719 }
 720
 721 /**********************************************************************
 722  Some varients of the LDAP rebind code do not pass in the third 'arg'
 723  pointer to a void*, so we try and work around it by assuming that the
 724  value of the 'LDAP *' pointer is the same as the one we had passed in
 725  **********************************************************************/
 726
 727 struct smbldap_state_lookup {
 728         LDAP *ld;
 729         struct smbldap_state *smbldap_state;
 730         struct smbldap_state_lookup *prev, *next;
 731 };
 732
 733 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 734
 735 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 736 {
 737         struct smbldap_state_lookup *t;
 738
 739         for (t = smbldap_state_lookup_list; t; t = t->next) {
 740                 if (t->ld == ld) {
 741                         return t->smbldap_state;
 742                 }
 743         }
 744         return NULL;
 745 }
 746
 747 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 748 {
 749         struct smbldap_state_lookup *t;
 750
 751         for (t = smbldap_state_lookup_list; t; t = t->next) {
 752                 if (t->smbldap_state == smbldap_state) {
 753                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 754                         SAFE_FREE(t);
 755                         return;
 756                 }
 757         }
 758 }
 759
 760 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 761 {
 762         struct smbldap_state *tmp_ldap_state;
 763         struct smbldap_state_lookup *t;
 764
 765         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 766                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 767                 return;
 768         }
 769
 770         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 771         ZERO_STRUCTP(t);
 772
 773         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 774         t->ld = ld;
 775         t->smbldap_state = smbldap_state;
 776 }
 777
 778 /********************************************************************
 779  start TLS on an existing LDAP connection
 780 *******************************************************************/
 781
 782 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 783 {
 784 #ifdef LDAP_OPT_X_TLS
 785         int rc;
 786 #endif
 787
 788         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 789                 return LDAP_SUCCESS;
 790         }
 791
 792 #ifdef LDAP_OPT_X_TLS
 793         if (version != LDAP_VERSION3) {
 794                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 795                 return LDAP_OPERATIONS_ERROR;
 796         }
 797
 798         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 799                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 800                          ldap_err2string(rc)));
 801                 return rc;
 802         }
 803
 804         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 805         return LDAP_SUCCESS;
 806 #else
 807         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 808         return LDAP_OPERATIONS_ERROR;
 809 #endif
 810 }
 811
 812 /********************************************************************
 813  setup a connection to the LDAP server based on a uri
 814 *******************************************************************/
 815
 816 static int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 817 {
 818         int rc;
 819
 820         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 821
 822 #ifdef HAVE_LDAP_INITIALIZE
 823
 824         rc = ldap_initialize(ldap_struct, uri);
 825         if (rc) {
 826                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 827                 return rc;
 828         }
 829
 830         if (lp_ldap_follow_referral() != Auto) {
 831                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_REFERRALS,
 832                      lp_ldap_follow_referral() ? LDAP_OPT_ON : LDAP_OPT_OFF);
 833                 if (rc != LDAP_SUCCESS)
 834                         DEBUG(0, ("Failed to set LDAP_OPT_REFERRALS: %s\n",
 835                                 ldap_err2string(rc)));
 836         }
 837
 838         return LDAP_SUCCESS;
 839 #else
 840
 841         /* Parse the string manually */
 842
 843         {
 844                 int port = 0;
 845                 fstring protocol;
 846                 fstring host;
 847                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 848
 849
 850                 /* skip leading "URL:" (if any) */
 851                 if ( strnequal( uri, "URL:", 4 ) ) {
 852                         uri += 4;
 853                 }
 854
 855                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 856
 857                 if (port == 0) {
 858                         if (strequal(protocol, "ldap")) {
 859                                 port = LDAP_PORT;
 860                         } else if (strequal(protocol, "ldaps")) {
 861                                 port = LDAPS_PORT;
 862                         } else {
 863                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 864                         }
 865                 }
 866
 867                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 868                         DEBUG(0, ("ldap_init failed !\n"));
 869                         return LDAP_OPERATIONS_ERROR;
 870                 }
 871
 872                 if (strequal(protocol, "ldaps")) {
 873 #ifdef LDAP_OPT_X_TLS
 874                         int tls = LDAP_OPT_X_TLS_HARD;
 875                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 876                         {
 877                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 878                         }
 879
 880                         DEBUG(3,("LDAPS option set...!\n"));
 881 #else
 882                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 883                         return LDAP_OPERATIONS_ERROR;
 884 #endif /* LDAP_OPT_X_TLS */
 885                 }
 886         }
 887 #endif /* HAVE_LDAP_INITIALIZE */
 888
 889         /* now set connection timeout */
 890 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 891         {
 892                 int ct = lp_ldap_connection_timeout()*1000;
 893                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 894                 if (rc != LDAP_SUCCESS) {
 895                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 896                                 ct, ldap_err2string(rc)));
 897                 }
 898         }
 899 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 900         {
 901                 struct timeval ct;
 902                 ct.tv_usec = 0;
 903                 ct.tv_sec = lp_ldap_connection_timeout();
 904                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 905                 if (rc != LDAP_SUCCESS) {
 906                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 907                                 (int)ct.tv_sec, ldap_err2string(rc)));
 908                 }
 909         }
 910 #endif
 911
 912         return LDAP_SUCCESS;
 913 }
 914
 915 /********************************************************************
 916  try to upgrade to Version 3 LDAP if not already, in either case return current
 917  version
 918  *******************************************************************/
 919
 920 static int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 921 {
 922         int version;
 923         int rc;
 924
 925         /* assume the worst */
 926         *new_version = LDAP_VERSION2;
 927
 928         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 929         if (rc) {
 930                 return rc;
 931         }
 932
 933         if (version == LDAP_VERSION3) {
 934                 *new_version = LDAP_VERSION3;
 935                 return LDAP_SUCCESS;
 936         }
 937
 938         /* try upgrade */
 939         version = LDAP_VERSION3;
 940         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 941         if (rc) {
 942                 return rc;
 943         }
 944
 945         *new_version = LDAP_VERSION3;
 946         return LDAP_SUCCESS;
 947 }
 948
 949 /*******************************************************************
 950  open a connection to the ldap server (just until the bind)
 951  ******************************************************************/
 952
 953 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 954 {
 955         int rc, version;
 956
 957         rc = smb_ldap_setup_conn(ldap_struct, uri);
 958         if (rc) {
 959                 return rc;
 960         }
 961
 962         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 963         if (rc) {
 964                 return rc;
 965         }
 966
 967         rc = smb_ldap_start_tls(*ldap_struct, version);
 968         if (rc) {
 969                 return rc;
 970         }
 971
 972         return LDAP_SUCCESS;
 973 }
 974
 975 /*******************************************************************
 976  open a connection to the ldap server.
 977 ******************************************************************/
 978 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 979
 980 {
 981         int rc = LDAP_SUCCESS;
 982         int version;
 983         int deref;
 984         LDAP **ldap_struct = &ldap_state->ldap_struct;
 985
 986         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 987         if (rc) {
 988                 return rc;
 989         }
 990
 991         /* Store the LDAP pointer in a lookup list */
 992
 993         smbldap_store_state(*ldap_struct, ldap_state);
 994
 995         /* Upgrade to LDAPv3 if possible */
 996
 997         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 998         if (rc) {
 999                 return rc;
1000         }
1001
1002         /* Start TLS if required */
1003
1004         rc = smb_ldap_start_tls(*ldap_struct, version);
1005         if (rc) {
1006                 return rc;
1007         }
1008
1009         /* Set alias dereferencing method */
1010         deref = lp_ldap_deref();
1011         if (deref != -1) {
1012                 if (ldap_set_option (*ldap_struct, LDAP_OPT_DEREF, &deref) != LDAP_OPT_SUCCESS) {
1013                         DEBUG(1,("smbldap_open_connection: Failed to set dereferencing method: %d\n", deref));
1014                 } else {
1015                         DEBUG(5,("Set dereferencing method: %d\n", deref));
1016                 }
1017         }
1018
1019         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
1020         return rc;
1021 }
1022
1023 /*******************************************************************
1024  a rebind function for authenticated referrals
1025  This version takes a void* that we can shove useful stuff in :-)
1026 ******************************************************************/
1027 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1028 #else
1029 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
1030                                    int *methodp, int freeit, void *arg)
1031 {
1032         struct smbldap_state *ldap_state = arg;
1033         struct timespec ts;
1034
1035         /** @TODO Should we be doing something to check what servers we rebind to?
1036             Could we get a referral to a machine that we don't want to give our
1037             username and password to? */
1038
1039         if (freeit) {
1040                 SAFE_FREE(*whop);
1041                 if (*credp) {
1042                         memset(*credp, '\0', strlen(*credp));
1043                 }
1044                 SAFE_FREE(*credp);
1045         } else {
1046                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
1047                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
1048
1049                 if (ldap_state->anonymous) {
1050                         *whop = NULL;
1051                         *credp = NULL;
1052                 } else {
1053                         *whop = SMB_STRDUP(ldap_state->bind_dn);
1054                         if (!*whop) {
1055                                 return LDAP_NO_MEMORY;
1056                         }
1057                         *credp = SMB_STRDUP(ldap_state->bind_secret);
1058                         if (!*credp) {
1059                                 SAFE_FREE(*whop);
1060                                 return LDAP_NO_MEMORY;
1061                         }
1062                 }
1063                 *methodp = LDAP_AUTH_SIMPLE;
1064         }
1065
1066         clock_gettime_mono(&ts);
1067         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
1068
1069         return 0;
1070 }
1071 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1072
1073 /*******************************************************************
1074  a rebind function for authenticated referrals
1075  This version takes a void* that we can shove useful stuff in :-)
1076  and actually does the connection.
1077 ******************************************************************/
1078 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1079 static int rebindproc_connect_with_state (LDAP *ldap_struct,
1080                                           LDAP_CONST char *url,
1081                                           ber_tag_t request,
1082                                           ber_int_t msgid, void *arg)
1083 {
1084         struct smbldap_state *ldap_state =
1085                 (struct smbldap_state *)arg;
1086         int rc;
1087         struct timespec ts;
1088         int version;
1089
1090         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
1091                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
1092
1093         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
1094          * itself) before rebinding to another LDAP server to avoid to expose
1095          * our credentials. At least *try* to secure the connection - Guenther */
1096
1097         smb_ldap_upgrade_conn(ldap_struct, &version);
1098         smb_ldap_start_tls(ldap_struct, version);
1099
1100         /** @TODO Should we be doing something to check what servers we rebind to?
1101             Could we get a referral to a machine that we don't want to give our
1102             username and password to? */
1103
1104         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1105
1106         /* only set the last rebind timestamp when we did rebind after a
1107          * non-read LDAP operation. That way we avoid the replication sleep
1108          * after a simple redirected search operation - Guenther */
1109
1110         switch (request) {
1111
1112                 case LDAP_REQ_MODIFY:
1113                 case LDAP_REQ_ADD:
1114                 case LDAP_REQ_DELETE:
1115                 case LDAP_REQ_MODDN:
1116                 case LDAP_REQ_EXTENDED:
1117                         DEBUG(10,("rebindproc_connect_with_state: "
1118                                 "setting last_rebind timestamp "
1119                                 "(req: 0x%02x)\n", (unsigned int)request));
1120                         clock_gettime_mono(&ts);
1121                         ldap_state->last_rebind = convert_timespec_to_timeval(ts);
1122                         break;
1123                 default:
1124                         ZERO_STRUCT(ldap_state->last_rebind);
1125                         break;
1126         }
1127
1128         return rc;
1129 }
1130 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1131
1132 /*******************************************************************
1133  Add a rebind function for authenticated referrals
1134 ******************************************************************/
1135 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1136 #else
1137 # if LDAP_SET_REBIND_PROC_ARGS == 2
1138 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
1139                        int *method, int freeit )
1140 {
1141         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
1142
1143         return rebindproc_with_state(ldap_struct, whop, credp,
1144                                      method, freeit, ldap_state);
1145 }
1146 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1147 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1148
1149 /*******************************************************************
1150  a rebind function for authenticated referrals
1151  this also does the connection, but no void*.
1152 ******************************************************************/
1153 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1154 # if LDAP_SET_REBIND_PROC_ARGS == 2
1155 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
1156                                ber_int_t msgid)
1157 {
1158         struct smbldap_state *ldap_state = smbldap_find_state(ld);
1159
1160         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
1161                                              ldap_state);
1162 }
1163 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
1164 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1165
1166 /*******************************************************************
1167  connect to the ldap server under system privilege.
1168 ******************************************************************/
1169 static int smbldap_connect_system(struct smbldap_state *ldap_state)
1170 {
1171         LDAP *ldap_struct = ldap_state->ldap_struct;
1172         int rc;
1173         int version;
1174
1175         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
1176                 char *bind_dn = NULL;
1177                 char *bind_secret = NULL;
1178
1179                 /* get the default dn and password only if they are not set already */
1180                 if (!fetch_ldap_pw(&bind_dn, &bind_secret)) {
1181                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
1182                         rc = LDAP_INVALID_CREDENTIALS;
1183                         goto done;
1184                 }
1185                 smbldap_set_creds(ldap_state, false, bind_dn, bind_secret);
1186                 SAFE_FREE(bind_dn);
1187                 memset(bind_secret, '\0', strlen(bind_secret));
1188                 SAFE_FREE(bind_secret);
1189         }
1190
1191         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
1192            (OpenLDAP) doesnt' seem to support it */
1193
1194         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
1195                   ldap_state->uri, ldap_state->bind_dn));
1196
1197 #ifdef HAVE_LDAP_SET_REBIND_PROC
1198 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
1199 # if LDAP_SET_REBIND_PROC_ARGS == 2
1200         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
1201 # endif
1202 # if LDAP_SET_REBIND_PROC_ARGS == 3
1203         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
1204 # endif
1205 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1206 # if LDAP_SET_REBIND_PROC_ARGS == 2
1207         ldap_set_rebind_proc(ldap_struct, &rebindproc);
1208 # endif
1209 # if LDAP_SET_REBIND_PROC_ARGS == 3
1210         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
1211 # endif
1212 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
1213 #endif
1214
1215         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
1216
1217         if (rc != LDAP_SUCCESS) {
1218                 char *ld_error = NULL;
1219                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1220                                 &ld_error);
1221                 DEBUG(ldap_state->num_failures ? 2 : 0,
1222                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
1223                                ldap_state->uri,
1224                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
1225                                ldap_err2string(rc),
1226                                ld_error ? ld_error : "(unknown)"));
1227                 SAFE_FREE(ld_error);
1228                 ldap_state->num_failures++;
1229                 goto done;
1230         }
1231
1232         ldap_state->num_failures = 0;
1233         ldap_state->paged_results = False;
1234
1235         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1236
1237         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1238                 ldap_state->paged_results = True;
1239         }
1240
1241         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1242         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1243                 ldap_state->paged_results ? "does" : "does not"));
1244 done:
1245         if (rc != 0) {
1246                 ldap_unbind(ldap_struct);
1247                 ldap_state->ldap_struct = NULL;
1248         }
1249         return rc;
1250 }
1251
1252 static void smbldap_idle_fn(struct event_context *event_ctx,
1253                             struct timed_event *te,
1254                             struct timeval now_abs,
1255                             void *private_data);
1256
1257 /**********************************************************************
1258  Connect to LDAP server (called before every ldap operation)
1259 *********************************************************************/
1260 static int smbldap_open(struct smbldap_state *ldap_state)
1261 {
1262         int rc, opt_rc;
1263         bool reopen = False;
1264         SMB_ASSERT(ldap_state);
1265
1266         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time_mono(NULL))) {
1267
1268 #ifdef HAVE_UNIXSOCKET
1269                 struct sockaddr_un addr;
1270 #else
1271                 struct sockaddr addr;
1272 #endif
1273                 socklen_t len = sizeof(addr);
1274                 int sd;
1275
1276                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1277                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1278                         reopen = True;
1279
1280 #ifdef HAVE_UNIXSOCKET
1281                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1282                         reopen = True;
1283 #endif
1284                 if (reopen) {
1285                         /* the other end has died. reopen. */
1286                         ldap_unbind(ldap_state->ldap_struct);
1287                         ldap_state->ldap_struct = NULL;
1288                         ldap_state->last_ping = (time_t)0;
1289                 } else {
1290                         ldap_state->last_ping = time_mono(NULL);
1291                 }
1292         }
1293
1294         if (ldap_state->ldap_struct != NULL) {
1295                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1296                 return LDAP_SUCCESS;
1297         }
1298
1299         if ((rc = smbldap_open_connection(ldap_state))) {
1300                 return rc;
1301         }
1302
1303         if ((rc = smbldap_connect_system(ldap_state))) {
1304                 return rc;
1305         }
1306
1307
1308         ldap_state->last_ping = time_mono(NULL);
1309         ldap_state->pid = sys_getpid();
1310
1311         TALLOC_FREE(ldap_state->idle_event);
1312
1313         if (ldap_state->event_context != NULL) {
1314                 ldap_state->idle_event = event_add_timed(
1315                         ldap_state->event_context, ldap_state,
1316                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1317                         smbldap_idle_fn, ldap_state);
1318         }
1319
1320         DEBUG(4,("The LDAP server is successfully connected\n"));
1321
1322         return LDAP_SUCCESS;
1323 }
1324
1325 /**********************************************************************
1326 Disconnect from LDAP server
1327 *********************************************************************/
1328 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1329 {
1330         if (!ldap_state)
1331                 return NT_STATUS_INVALID_PARAMETER;
1332
1333         if (ldap_state->ldap_struct != NULL) {
1334                 ldap_unbind(ldap_state->ldap_struct);
1335                 ldap_state->ldap_struct = NULL;
1336         }
1337
1338         smbldap_delete_state(ldap_state);
1339
1340         TALLOC_FREE(ldap_state->idle_event);
1341
1342         DEBUG(5,("The connection to the LDAP server was closed\n"));
1343         /* maybe free the results here --metze */
1344
1345         return NT_STATUS_OK;
1346 }
1347
1348 static SIG_ATOMIC_T got_alarm;
1349
1350 static void gotalarm_sig(int dummy)
1351 {
1352         got_alarm = 1;
1353 }
1354
1355 static time_t calc_ldap_abs_endtime(int ldap_to)
1356 {
1357         if (ldap_to == 0) {
1358                 /* No timeout - don't
1359                    return a value for
1360                    the alarm. */
1361                 return (time_t)0;
1362         }
1363
1364         /* Make the alarm time one second beyond
1365            the timout we're setting for the
1366            remote search timeout, to allow that
1367            to fire in preference. */
1368
1369         return time_mono(NULL)+ldap_to+1;
1370 }
1371
1372 static int end_ldap_local_alarm(time_t absolute_endtime, int rc)
1373 {
1374         if (absolute_endtime) {
1375                 alarm(0);
1376                 CatchSignal(SIGALRM, SIG_IGN);
1377                 if (got_alarm) {
1378                         /* Client timeout error code. */
1379                         got_alarm = 0;
1380                         return LDAP_TIMEOUT;
1381                 }
1382         }
1383         return rc;
1384 }
1385
1386 static void setup_ldap_local_alarm(struct smbldap_state *ldap_state, time_t absolute_endtime)
1387 {
1388         time_t now = time_mono(NULL);
1389
1390         if (absolute_endtime) {
1391                 got_alarm = 0;
1392                 CatchSignal(SIGALRM, gotalarm_sig);
1393                 alarm(absolute_endtime - now);
1394         }
1395
1396         if (ldap_state->pid != sys_getpid()) {
1397                 smbldap_close(ldap_state);
1398         }
1399 }
1400
1401 static void get_ldap_errs(struct smbldap_state *ldap_state, char **pp_ld_error, int *p_ld_errno)
1402 {
1403         ldap_get_option(ldap_state->ldap_struct,
1404                         LDAP_OPT_ERROR_NUMBER, p_ld_errno);
1405
1406         ldap_get_option(ldap_state->ldap_struct,
1407                         LDAP_OPT_ERROR_STRING, pp_ld_error);
1408 }
1409
1410 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1411                             int *attempts, time_t abs_endtime)
1412 {
1413         time_t now = time_mono(NULL);
1414         int open_rc = LDAP_SERVER_DOWN;
1415
1416         if (*rc != LDAP_SERVER_DOWN)
1417                 goto no_next;
1418
1419         if (abs_endtime && now >= abs_endtime) {
1420                 smbldap_close(ldap_state);
1421                 *rc = LDAP_TIMEOUT;
1422                 goto no_next;
1423         }
1424
1425         while (1) {
1426
1427                 if (*attempts != 0)
1428                         smb_msleep(1000);
1429
1430                 *attempts += 1;
1431
1432                 open_rc = smbldap_open(ldap_state);
1433
1434                 if (open_rc == LDAP_SUCCESS) {
1435                         ldap_state->last_use = now;
1436                         return True;
1437                 }
1438
1439                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1440                         /* The fact that we are non-root or any other
1441                          * access-denied condition will not change in the next
1442                          * round of trying */
1443                         *rc = open_rc;
1444                         break;
1445                 }
1446
1447                 if (got_alarm) {
1448                         *rc = LDAP_TIMEOUT;
1449                         break;
1450                 }
1451
1452                 if (open_rc != LDAP_SUCCESS) {
1453                         DEBUG(1, ("Connection to LDAP server failed for the "
1454                                   "%d try!\n", *attempts));
1455                 }
1456         }
1457
1458  no_next:
1459         ldap_state->last_use = now;
1460         return False;
1461 }
1462
1463 /*********************************************************************
1464  ********************************************************************/
1465
1466 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1467                               const char *base, int scope, const char *filter,
1468                               const char *attrs[], int attrsonly,
1469                               LDAPControl **sctrls, LDAPControl **cctrls,
1470                               int sizelimit, LDAPMessage **res)
1471 {
1472         int             rc = LDAP_SERVER_DOWN;
1473         int             attempts = 0;
1474         char           *utf8_filter;
1475         int             to = lp_ldap_timeout();
1476         time_t          abs_endtime = calc_ldap_abs_endtime(to);
1477         struct          timeval timeout;
1478         struct          timeval *timeout_ptr = NULL;
1479         size_t          converted_size;
1480
1481         SMB_ASSERT(ldap_state);
1482
1483         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1484                  "scope => [%d]\n", base, filter, scope));
1485
1486         if (ldap_state->last_rebind.tv_sec > 0) {
1487                 struct timeval  tval;
1488                 struct timespec ts;
1489                 int64_t tdiff = 0;
1490                 int             sleep_time = 0;
1491
1492                 clock_gettime_mono(&ts);
1493                 tval = convert_timespec_to_timeval(ts);
1494
1495                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1496                 tdiff /= 1000; /* Convert to milliseconds. */
1497
1498                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1499                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1500
1501                 if (sleep_time > 0) {
1502                         /* we wait for the LDAP replication */
1503                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1504                                  "for LDAP replication.\n",sleep_time));
1505                         smb_msleep(sleep_time);
1506                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1507                 }
1508                 ZERO_STRUCT(ldap_state->last_rebind);
1509         }
1510
1511         if (!push_utf8_talloc(talloc_tos(), &utf8_filter, filter, &converted_size)) {
1512                 return LDAP_NO_MEMORY;
1513         }
1514
1515         /* Setup remote timeout for the ldap_search_ext_s call. */
1516         if (to) {
1517                 timeout.tv_sec = to;
1518                 timeout.tv_usec = 0;
1519                 timeout_ptr = &timeout;
1520         }
1521
1522         setup_ldap_local_alarm(ldap_state, abs_endtime);
1523
1524         while (another_ldap_try(ldap_state, &rc, &attempts, abs_endtime)) {
1525                 char *ld_error = NULL;
1526                 int ld_errno;
1527
1528                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1529                                        utf8_filter,
1530                                        discard_const_p(char *, attrs),
1531                                        attrsonly, sctrls, cctrls, timeout_ptr,
1532                                        sizelimit, res);
1533                 if (rc == LDAP_SUCCESS) {
1534                         break;
1535                 }
1536
1537                 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1538
1539                 DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1540                            "(%s)\n", base, ld_errno,
1541                            ldap_err2string(rc),
1542                            ld_error ? ld_error : "unknown"));
1543                 SAFE_FREE(ld_error);
1544
1545                 if (ld_errno == LDAP_SERVER_DOWN) {
1546                         ldap_unbind(ldap_state->ldap_struct);
1547                         ldap_state->ldap_struct = NULL;
1548                 }
1549         }
1550
1551         TALLOC_FREE(utf8_filter);
1552         return end_ldap_local_alarm(abs_endtime, rc);
1553 }
1554
1555 int smbldap_search(struct smbldap_state *ldap_state,
1556                    const char *base, int scope, const char *filter,
1557                    const char *attrs[], int attrsonly,
1558                    LDAPMessage **res)
1559 {
1560         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1561                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1562 }
1563
1564 int smbldap_search_paged(struct smbldap_state *ldap_state,
1565                          const char *base, int scope, const char *filter,
1566                          const char **attrs, int attrsonly, int pagesize,
1567                          LDAPMessage **res, void **cookie)
1568 {
1569         LDAPControl     pr;
1570         LDAPControl     **rcontrols;
1571         LDAPControl     *controls[2] = { NULL, NULL};
1572         BerElement      *cookie_be = NULL;
1573         struct berval   *cookie_bv = NULL;
1574         int             tmp = 0, i, rc;
1575         bool            critical = True;
1576
1577         *res = NULL;
1578
1579         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1580                  "scope => [%d], pagesize => [%d]\n",
1581                  base, filter, scope, pagesize));
1582
1583         cookie_be = ber_alloc_t(LBER_USE_DER);
1584         if (cookie_be == NULL) {
1585                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1586                          "NULL\n"));
1587                 return LDAP_NO_MEMORY;
1588         }
1589
1590         /* construct cookie */
1591         if (*cookie != NULL) {
1592                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1593                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1594                 *cookie = NULL;
1595         } else {
1596                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1597         }
1598         ber_flatten(cookie_be, &cookie_bv);
1599
1600         pr.ldctl_oid = discard_const_p(char, ADS_PAGE_CTL_OID);
1601         pr.ldctl_iscritical = (char) critical;
1602         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1603         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1604
1605         controls[0] = &pr;
1606         controls[1] = NULL;
1607
1608         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1609                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1610
1611         ber_free(cookie_be, 1);
1612         ber_bvfree(cookie_bv);
1613
1614         if (rc != 0) {
1615                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1616                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1617                 goto done;
1618         }
1619
1620         DEBUG(3,("smbldap_search_paged: search was successful\n"));
1621
1622         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1623                                NULL, NULL, &rcontrols,  0);
1624         if (rc != 0) {
1625                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1626                          "with [%s]\n", ldap_err2string(rc)));
1627                 goto done;
1628         }
1629
1630         if (rcontrols == NULL)
1631                 goto done;
1632
1633         for (i=0; rcontrols[i]; i++) {
1634
1635                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1636                         continue;
1637
1638                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1639                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1640                 /* the berval is the cookie, but must be freed when it is all
1641                    done */
1642                 if (cookie_bv->bv_len)
1643                         *cookie=ber_bvdup(cookie_bv);
1644                 else
1645                         *cookie=NULL;
1646                 ber_bvfree(cookie_bv);
1647                 ber_free(cookie_be, 1);
1648                 break;
1649         }
1650         ldap_controls_free(rcontrols);
1651 done:
1652         return rc;
1653 }
1654
1655 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1656 {
1657         int             rc = LDAP_SERVER_DOWN;
1658         int             attempts = 0;
1659         char           *utf8_dn;
1660         time_t          abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1661         size_t          converted_size;
1662
1663         SMB_ASSERT(ldap_state);
1664
1665         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1666
1667         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1668                 return LDAP_NO_MEMORY;
1669         }
1670
1671         setup_ldap_local_alarm(ldap_state, abs_endtime);
1672
1673         while (another_ldap_try(ldap_state, &rc, &attempts, abs_endtime)) {
1674                 char *ld_error = NULL;
1675                 int ld_errno;
1676
1677                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1678                 if (rc == LDAP_SUCCESS) {
1679                         break;
1680                 }
1681
1682                 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1683
1684                 DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1685                            "(%s)\n", dn, ld_errno,
1686                            ldap_err2string(rc),
1687                            ld_error ? ld_error : "unknown"));
1688                 SAFE_FREE(ld_error);
1689
1690                 if (ld_errno == LDAP_SERVER_DOWN) {
1691                         ldap_unbind(ldap_state->ldap_struct);
1692                         ldap_state->ldap_struct = NULL;
1693                 }
1694         }
1695
1696         TALLOC_FREE(utf8_dn);
1697         return end_ldap_local_alarm(abs_endtime, rc);
1698 }
1699
1700 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1701 {
1702         int             rc = LDAP_SERVER_DOWN;
1703         int             attempts = 0;
1704         char           *utf8_dn;
1705         time_t          abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1706         size_t          converted_size;
1707
1708         SMB_ASSERT(ldap_state);
1709
1710         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1711
1712         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1713                 return LDAP_NO_MEMORY;
1714         }
1715
1716         setup_ldap_local_alarm(ldap_state, abs_endtime);
1717
1718         while (another_ldap_try(ldap_state, &rc, &attempts, abs_endtime)) {
1719                 char *ld_error = NULL;
1720                 int ld_errno;
1721
1722                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1723                 if (rc == LDAP_SUCCESS) {
1724                         break;
1725                 }
1726
1727                 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1728
1729                 DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1730                            "(%s)\n", dn, ld_errno,
1731                            ldap_err2string(rc),
1732                            ld_error ? ld_error : "unknown"));
1733                 SAFE_FREE(ld_error);
1734
1735                 if (ld_errno == LDAP_SERVER_DOWN) {
1736                         ldap_unbind(ldap_state->ldap_struct);
1737                         ldap_state->ldap_struct = NULL;
1738                 }
1739         }
1740
1741         TALLOC_FREE(utf8_dn);
1742         return end_ldap_local_alarm(abs_endtime, rc);
1743 }
1744
1745 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1746 {
1747         int             rc = LDAP_SERVER_DOWN;
1748         int             attempts = 0;
1749         char           *utf8_dn;
1750         time_t          abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1751         size_t          converted_size;
1752
1753         SMB_ASSERT(ldap_state);
1754
1755         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1756
1757         if (!push_utf8_talloc(talloc_tos(), &utf8_dn, dn, &converted_size)) {
1758                 return LDAP_NO_MEMORY;
1759         }
1760
1761         setup_ldap_local_alarm(ldap_state, abs_endtime);
1762
1763         while (another_ldap_try(ldap_state, &rc, &attempts, abs_endtime)) {
1764                 char *ld_error = NULL;
1765                 int ld_errno;
1766
1767                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1768                 if (rc == LDAP_SUCCESS) {
1769                         break;
1770                 }
1771
1772                 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1773
1774                 DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1775                            "(%s)\n", dn, ld_errno,
1776                            ldap_err2string(rc),
1777                            ld_error ? ld_error : "unknown"));
1778                 SAFE_FREE(ld_error);
1779
1780                 if (ld_errno == LDAP_SERVER_DOWN) {
1781                         ldap_unbind(ldap_state->ldap_struct);
1782                         ldap_state->ldap_struct = NULL;
1783                 }
1784         }
1785
1786         TALLOC_FREE(utf8_dn);
1787         return end_ldap_local_alarm(abs_endtime, rc);
1788 }
1789
1790 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1791                                LDAP_CONST char *reqoid, struct berval *reqdata,
1792                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1793                                char **retoidp, struct berval **retdatap)
1794 {
1795         int             rc = LDAP_SERVER_DOWN;
1796         int             attempts = 0;
1797         time_t          abs_endtime = calc_ldap_abs_endtime(lp_ldap_timeout());
1798
1799         if (!ldap_state)
1800                 return (-1);
1801
1802         setup_ldap_local_alarm(ldap_state, abs_endtime);
1803
1804         while (another_ldap_try(ldap_state, &rc, &attempts, abs_endtime)) {
1805                 char *ld_error = NULL;
1806                 int ld_errno;
1807
1808                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1809                                                reqdata, serverctrls,
1810                                                clientctrls, retoidp, retdatap);
1811                 if (rc == LDAP_SUCCESS) {
1812                         break;
1813                 }
1814
1815                 get_ldap_errs(ldap_state, &ld_error, &ld_errno);
1816
1817                 DEBUG(10, ("Extended operation failed with error: "
1818                            "%d (%s) (%s)\n", ld_errno,
1819                            ldap_err2string(rc),
1820                            ld_error ? ld_error : "unknown"));
1821                 SAFE_FREE(ld_error);
1822
1823                 if (ld_errno == LDAP_SERVER_DOWN) {
1824                         ldap_unbind(ldap_state->ldap_struct);
1825                         ldap_state->ldap_struct = NULL;
1826                 }
1827         }
1828
1829         return end_ldap_local_alarm(abs_endtime, rc);
1830 }
1831
1832 /*******************************************************************
1833  run the search by name.
1834 ******************************************************************/
1835 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1836                            const char *filter, const char **search_attr,
1837                            LDAPMessage ** result)
1838 {
1839         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1840                               filter, search_attr, 0, result);
1841 }
1842
1843 static void smbldap_idle_fn(struct event_context *event_ctx,
1844                             struct timed_event *te,
1845                             struct timeval now_abs,
1846                             void *private_data)
1847 {
1848         struct smbldap_state *state = (struct smbldap_state *)private_data;
1849
1850         TALLOC_FREE(state->idle_event);
1851
1852         if (state->ldap_struct == NULL) {
1853                 DEBUG(10,("ldap connection not connected...\n"));
1854                 return;
1855         }
1856
1857         if ((state->last_use+SMBLDAP_IDLE_TIME) > time_mono(NULL)) {
1858                 DEBUG(10,("ldap connection not idle...\n"));
1859
1860                 /* this needs to be made monotonic clock aware inside tevent: */
1861                 state->idle_event = event_add_timed(
1862                         event_ctx, state,
1863                         timeval_add(&now_abs, SMBLDAP_IDLE_TIME, 0),
1864                         smbldap_idle_fn,
1865                         private_data);
1866                 return;
1867         }
1868
1869         DEBUG(7,("ldap connection idle...closing connection\n"));
1870         smbldap_close(state);
1871 }
1872
1873 /**********************************************************************
1874  Housekeeping
1875  *********************************************************************/
1876
1877 void smbldap_free_struct(struct smbldap_state **ldap_state)
1878 {
1879         smbldap_close(*ldap_state);
1880
1881         if ((*ldap_state)->bind_secret) {
1882                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1883         }
1884
1885         SAFE_FREE((*ldap_state)->bind_dn);
1886         SAFE_FREE((*ldap_state)->bind_secret);
1887
1888         TALLOC_FREE(*ldap_state);
1889
1890         /* No need to free any further, as it is talloc()ed */
1891 }
1892
1893 static int smbldap_state_destructor(struct smbldap_state *state)
1894 {
1895         smbldap_free_struct(&state);
1896         return 0;
1897 }
1898
1899
1900 /**********************************************************************
1901  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1902  *********************************************************************/
1903
1904 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1905                       const char *location,
1906                       struct smbldap_state **smbldap_state)
1907 {
1908         *smbldap_state = talloc_zero(mem_ctx, struct smbldap_state);
1909         if (!*smbldap_state) {
1910                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1911                 return NT_STATUS_NO_MEMORY;
1912         }
1913
1914         if (location) {
1915                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1916         } else {
1917                 (*smbldap_state)->uri = "ldap://localhost";
1918         }
1919
1920         (*smbldap_state)->event_context = event_ctx;
1921
1922         talloc_set_destructor(*smbldap_state, smbldap_state_destructor);
1923         return NT_STATUS_OK;
1924 }
1925
1926  char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1927                          LDAPMessage *entry)
1928 {
1929         char *utf8_dn, *unix_dn;
1930         size_t converted_size;
1931
1932         utf8_dn = ldap_get_dn(ld, entry);
1933         if (!utf8_dn) {
1934                 DEBUG (5, ("smbldap_talloc_dn: ldap_get_dn failed\n"));
1935                 return NULL;
1936         }
1937         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1938                 DEBUG (0, ("smbldap_talloc_dn: String conversion failure utf8 "
1939                            "[%s]\n", utf8_dn));
1940                 return NULL;
1941         }
1942         ldap_memfree(utf8_dn);
1943         return unix_dn;
1944 }
1945
1946 /*******************************************************************
1947  Check if root-dse has a certain Control or Extension
1948 ********************************************************************/
1949
1950 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1951 {
1952         LDAPMessage *msg = NULL;
1953         LDAPMessage *entry = NULL;
1954         char **values = NULL;
1955         int rc, num_result, num_values, i;
1956         bool result = False;
1957
1958         if (!attrs[0]) {
1959                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1960                 return False;
1961         }
1962
1963         if (!strequal(attrs[0], "supportedExtension") &&
1964             !strequal(attrs[0], "supportedControl") &&
1965             !strequal(attrs[0], "namingContexts")) {
1966                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1967                 return False;
1968         }
1969
1970         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1971                            "(objectclass=*)", discard_const_p(char *, attrs), 0 , &msg);
1972
1973         if (rc != LDAP_SUCCESS) {
1974                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1975                 return False;
1976         }
1977
1978         num_result = ldap_count_entries(ld, msg);
1979
1980         if (num_result != 1) {
1981                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1982                 goto done;
1983         }
1984
1985         entry = ldap_first_entry(ld, msg);
1986
1987         if (entry == NULL) {
1988                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1989                 goto done;
1990         }
1991
1992         values = ldap_get_values(ld, entry, attrs[0]);
1993
1994         if (values == NULL) {
1995                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1996                 goto done;
1997         }
1998
1999         num_values = ldap_count_values(values);
2000
2001         if (num_values == 0) {
2002                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
2003                 goto done;
2004         }
2005
2006         for (i=0; i<num_values; i++) {
2007                 if (strcmp(values[i], value) == 0)
2008                         result = True;
2009         }
2010
2011
2012  done:
2013         if (values != NULL)
2014                 ldap_value_free(values);
2015         if (msg != NULL)
2016                 ldap_msgfree(msg);
2017
2018         return result;
2019
2020 }
2021
2022 /*******************************************************************
2023  Check if LDAP-Server supports a certain Control (OID in string format)
2024 ********************************************************************/
2025
2026 bool smbldap_has_control(LDAP *ld, const char *control)
2027 {
2028         const char *attrs[] = { "supportedControl", NULL };
2029         return smbldap_check_root_dse(ld, attrs, control);
2030 }
2031
2032 /*******************************************************************
2033  Check if LDAP-Server supports a certain Extension (OID in string format)
2034 ********************************************************************/
2035
2036 bool smbldap_has_extension(LDAP *ld, const char *extension)
2037 {
2038         const char *attrs[] = { "supportedExtension", NULL };
2039         return smbldap_check_root_dse(ld, attrs, extension);
2040 }
2041
2042 /*******************************************************************
2043  Check if LDAP-Server holds a given namingContext
2044 ********************************************************************/
2045
2046 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
2047 {
2048         const char *attrs[] = { "namingContexts", NULL };
2049         return smbldap_check_root_dse(ld, attrs, naming_context);
2050 }
2051
2052 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
2053 {
2054         ldap_state->anonymous = anon;
2055
2056         /* free any previously set credential */
2057
2058         SAFE_FREE(ldap_state->bind_dn);
2059         if (ldap_state->bind_secret) {
2060                 /* make sure secrets are zeroed out of memory */
2061                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
2062                 SAFE_FREE(ldap_state->bind_secret);
2063         }
2064
2065         if ( ! anon) {
2066                 ldap_state->bind_dn = SMB_STRDUP(dn);
2067                 ldap_state->bind_secret = SMB_STRDUP(secret);
2068         }
2069
2070         return True;
2071 }