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 2 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, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 */
  25
  26 #include "includes.h"
  27 #include "smbldap.h"
  28
  29 #ifndef LDAP_OPT_SUCCESS
  30 #define LDAP_OPT_SUCCESS 0
  31 #endif
  32
  33 /* Try not to hit the up or down server forever */
  34
  35 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  36 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  37
  38 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  39
  40
  41 /* attributes used by Samba 2.2 */
  42
  43 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  44         { LDAP_ATTR_UID,                "uid"           },
  45         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  46         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  47         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  48         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  49         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  50         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  51         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  52         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  53         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  54         { LDAP_ATTR_CN,                 "cn"            },
  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_DISPLAY_NAME,       "displayName"           },
 110         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 111         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 112         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 113         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 114         { LDAP_ATTR_DESC,               "description"           },
 115         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 116         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 117         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 118         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 119         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 120         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 121         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 122         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 123         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 124         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 125         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 126         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 127         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 128         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 129         { LDAP_ATTR_LIST_END,           NULL                    }
 130 };
 131
 132 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 133         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 134         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 135         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 136         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 137         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 138         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 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( 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 = SMB_MALLOC_ARRAY( 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] = SMB_STRDUP( table[i].name );
 251                 i++;
 252         }
 253         names[i] = NULL;
 254
 255         return names;
 256 }
 257
 258 /*********************************************************************
 259  Cleanup
 260  ********************************************************************/
 261
 262  void free_attr_list( const char **list )
 263 {
 264         int i = 0;
 265
 266         if ( !list )
 267                 return;
 268
 269         while ( list[i] ) {
 270                 /* SAFE_FREE generates a warning here that can't be gotten rid
 271                  * of with CONST_DISCARD */
 272                 if (list[i] != NULL) {
 273                         free(CONST_DISCARD(char *, list[i]));
 274                 }
 275                 i+=1;
 276         }
 277
 278         SAFE_FREE( list );
 279 }
 280
 281 /*******************************************************************
 282  Search an attribute and return the first value found.
 283 ******************************************************************/
 284
 285  BOOL smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 286                                     const char *attribute, char *value,
 287                                     int max_len)
 288 {
 289         char **values;
 290
 291         if ( !attribute )
 292                 return False;
 293
 294         value[0] = '\0';
 295
 296         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 297                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 298
 299                 return False;
 300         }
 301
 302         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 303                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 304                           attribute, values[0]));
 305                 ldap_value_free(values);
 306                 return False;
 307         }
 308
 309         ldap_value_free(values);
 310 #ifdef DEBUG_PASSWORDS
 311         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 312 #endif
 313         return True;
 314 }
 315
 316  BOOL smbldap_get_single_pstring (LDAP * ldap_struct, LDAPMessage * entry,
 317                                   const char *attribute, pstring value)
 318 {
 319         return smbldap_get_single_attribute(ldap_struct, entry,
 320                                             attribute, value,
 321                                             sizeof(pstring));
 322 }
 323
 324 /************************************************************************
 325  Routine to manage the LDAPMod structure array
 326  manage memory used by the array, by each struct, and values
 327  ***********************************************************************/
 328
 329  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 330 {
 331         LDAPMod **mods;
 332         int i;
 333         int j;
 334
 335         mods = *modlist;
 336
 337         /* sanity checks on the mod values */
 338
 339         if (attribute == NULL || *attribute == '\0') {
 340                 return;
 341         }
 342
 343 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 344            left here so other do not re-add similar code   --jerry */
 345         if (value == NULL || *value == '\0')
 346                 return;
 347 #endif
 348
 349         if (mods == NULL) {
 350                 mods = SMB_MALLOC_P(LDAPMod *);
 351                 if (mods == NULL) {
 352                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 353                         return;
 354                 }
 355                 mods[0] = NULL;
 356         }
 357
 358         for (i = 0; mods[i] != NULL; ++i) {
 359                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 360                         break;
 361         }
 362
 363         if (mods[i] == NULL) {
 364                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 365                 if (mods == NULL) {
 366                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 367                         return;
 368                 }
 369                 mods[i] = SMB_MALLOC_P(LDAPMod);
 370                 if (mods[i] == NULL) {
 371                         DEBUG(0, ("make_a_mod: out of memory!\n"));
 372                         return;
 373                 }
 374                 mods[i]->mod_op = modop;
 375                 mods[i]->mod_values = NULL;
 376                 mods[i]->mod_type = SMB_STRDUP(attribute);
 377                 mods[i + 1] = NULL;
 378         }
 379
 380         if (value != NULL) {
 381                 char *utf8_value = NULL;
 382
 383                 j = 0;
 384                 if (mods[i]->mod_values != NULL) {
 385                         for (; mods[i]->mod_values[j] != NULL; j++);
 386                 }
 387                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 388
 389                 if (mods[i]->mod_values == NULL) {
 390                         DEBUG (0, ("make_a_mod: Memory allocation failure!\n"));
 391                         return;
 392                 }
 393
 394                 if (push_utf8_allocate(&utf8_value, value) == (size_t)-1) {
 395                         DEBUG (0, ("make_a_mod: String conversion failure!\n"));
 396                         return;
 397                 }
 398
 399                 mods[i]->mod_values[j] = utf8_value;
 400
 401                 mods[i]->mod_values[j + 1] = NULL;
 402         }
 403         *modlist = mods;
 404 }
 405
 406 /**********************************************************************
 407   Set attribute to newval in LDAP, regardless of what value the
 408   attribute had in LDAP before.
 409 *********************************************************************/
 410
 411  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 412                       LDAPMod ***mods,
 413                       const char *attribute, const char *newval)
 414 {
 415         char oldval[2048]; /* current largest allowed value is mungeddial */
 416         BOOL existed;
 417
 418         if (attribute == NULL) {
 419                 /* This can actually happen for ldapsam_compat where we for
 420                  * example don't have a password history */
 421                 return;
 422         }
 423
 424         if (existing != NULL) {
 425                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 426         } else {
 427                 existed = False;
 428                 *oldval = '\0';
 429         }
 430
 431         /* all of our string attributes are case insensitive */
 432
 433         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 434
 435                 /* Believe it or not, but LDAP will deny a delete and
 436                    an add at the same time if the values are the
 437                    same... */
 438                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 439                 return;
 440         }
 441
 442         if (existed) {
 443                 /* There has been no value before, so don't delete it.
 444                  * Here's a possible race: We might end up with
 445                  * duplicate attributes */
 446                 /* By deleting exactly the value we found in the entry this
 447                  * should be race-free in the sense that the LDAP-Server will
 448                  * deny the complete operation if somebody changed the
 449                  * attribute behind our back. */
 450                 /* This will also allow modifying single valued attributes
 451                  * in Novell NDS. In NDS you have to first remove attribute and then
 452                  * you could add new value */
 453
 454                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 455                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 456         }
 457
 458         /* Regardless of the real operation (add or modify)
 459            we add the new value here. We rely on deleting
 460            the old value, should it exist. */
 461
 462         if ((newval != NULL) && (strlen(newval) > 0)) {
 463                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 464                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 465         }
 466 }
 467
 468 /**********************************************************************
 469  Some varients of the LDAP rebind code do not pass in the third 'arg'
 470  pointer to a void*, so we try and work around it by assuming that the
 471  value of the 'LDAP *' pointer is the same as the one we had passed in
 472  **********************************************************************/
 473
 474 struct smbldap_state_lookup {
 475         LDAP *ld;
 476         struct smbldap_state *smbldap_state;
 477         struct smbldap_state_lookup *prev, *next;
 478 };
 479
 480 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 481
 482 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 483 {
 484         struct smbldap_state_lookup *t;
 485
 486         for (t = smbldap_state_lookup_list; t; t = t->next) {
 487                 if (t->ld == ld) {
 488                         return t->smbldap_state;
 489                 }
 490         }
 491         return NULL;
 492 }
 493
 494 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 495 {
 496         struct smbldap_state_lookup *t;
 497
 498         for (t = smbldap_state_lookup_list; t; t = t->next) {
 499                 if (t->smbldap_state == smbldap_state) {
 500                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 501                         SAFE_FREE(t);
 502                         return;
 503                 }
 504         }
 505 }
 506
 507 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 508 {
 509         struct smbldap_state *tmp_ldap_state;
 510         struct smbldap_state_lookup *t;
 511         struct smbldap_state_lookup *tmp;
 512
 513         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 514                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 515                 return;
 516         }
 517
 518         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 519         ZERO_STRUCTP(t);
 520
 521         DLIST_ADD_END(smbldap_state_lookup_list, t, tmp);
 522         t->ld = ld;
 523         t->smbldap_state = smbldap_state;
 524 }
 525
 526 /*******************************************************************
 527  open a connection to the ldap server.
 528 ******************************************************************/
 529 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 530
 531 {
 532         int rc = LDAP_SUCCESS;
 533         int version;
 534         BOOL ldap_v3 = False;
 535         LDAP **ldap_struct = &ldap_state->ldap_struct;
 536
 537 #ifdef HAVE_LDAP_INITIALIZE
 538         DEBUG(10, ("smbldap_open_connection: %s\n", ldap_state->uri));
 539
 540         if ((rc = ldap_initialize(ldap_struct, ldap_state->uri)) != LDAP_SUCCESS) {
 541                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 542                 return rc;
 543         }
 544 #else
 545
 546         /* Parse the string manually */
 547
 548         {
 549                 int port = 0;
 550                 fstring protocol;
 551                 fstring host;
 552                 const char *p = ldap_state->uri;
 553                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 554
 555                 /* skip leading "URL:" (if any) */
 556                 if ( strnequal( p, "URL:", 4 ) ) {
 557                         p += 4;
 558                 }
 559
 560                 sscanf(p, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 561
 562                 if (port == 0) {
 563                         if (strequal(protocol, "ldap")) {
 564                                 port = LDAP_PORT;
 565                         } else if (strequal(protocol, "ldaps")) {
 566                                 port = LDAPS_PORT;
 567                         } else {
 568                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 569                         }
 570                 }
 571
 572                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 573                         DEBUG(0, ("ldap_init failed !\n"));
 574                         return LDAP_OPERATIONS_ERROR;
 575                 }
 576
 577                 if (strequal(protocol, "ldaps")) {
 578 #ifdef LDAP_OPT_X_TLS
 579                         int tls = LDAP_OPT_X_TLS_HARD;
 580                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 581                         {
 582                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 583                         }
 584
 585                         DEBUG(3,("LDAPS option set...!\n"));
 586 #else
 587                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 588                         return LDAP_OPERATIONS_ERROR;
 589 #endif
 590                 }
 591         }
 592 #endif
 593
 594         /* Store the LDAP pointer in a lookup list */
 595
 596         smbldap_store_state(*ldap_struct, ldap_state);
 597
 598         /* Upgrade to LDAPv3 if possible */
 599
 600         if (ldap_get_option(*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS)
 601         {
 602                 if (version != LDAP_VERSION3)
 603                 {
 604                         version = LDAP_VERSION3;
 605                         if (ldap_set_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS) {
 606                                 ldap_v3 = True;
 607                         }
 608                 } else {
 609                         ldap_v3 = True;
 610                 }
 611         }
 612
 613         if (lp_ldap_ssl() == LDAP_SSL_START_TLS) {
 614 #ifdef LDAP_OPT_X_TLS
 615                 if (ldap_v3) {
 616                         if ((rc = ldap_start_tls_s (*ldap_struct, NULL, NULL)) != LDAP_SUCCESS)
 617                         {
 618                                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 619                                          ldap_err2string(rc)));
 620                                 return rc;
 621                         }
 622                         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 623                 } else {
 624
 625                         DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 626                         return LDAP_OPERATIONS_ERROR;
 627                 }
 628 #else
 629                 DEBUG(0,("smbldap_open_connection: StartTLS not supported by LDAP client libraries!\n"));
 630                 return LDAP_OPERATIONS_ERROR;
 631 #endif
 632         }
 633
 634         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 635         return rc;
 636 }
 637
 638
 639 /*******************************************************************
 640  a rebind function for authenticated referrals
 641  This version takes a void* that we can shove useful stuff in :-)
 642 ******************************************************************/
 643 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 644 #else
 645 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 646                                    int *methodp, int freeit, void *arg)
 647 {
 648         struct smbldap_state *ldap_state = arg;
 649
 650         /** @TODO Should we be doing something to check what servers we rebind to?
 651             Could we get a referral to a machine that we don't want to give our
 652             username and password to? */
 653
 654         if (freeit) {
 655                 SAFE_FREE(*whop);
 656                 memset(*credp, '\0', strlen(*credp));
 657                 SAFE_FREE(*credp);
 658         } else {
 659                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 660                           ldap_state->bind_dn));
 661
 662                 *whop = SMB_STRDUP(ldap_state->bind_dn);
 663                 if (!*whop) {
 664                         return LDAP_NO_MEMORY;
 665                 }
 666                 *credp = SMB_STRDUP(ldap_state->bind_secret);
 667                 if (!*credp) {
 668                         SAFE_FREE(*whop);
 669                         return LDAP_NO_MEMORY;
 670                 }
 671                 *methodp = LDAP_AUTH_SIMPLE;
 672         }
 673
 674         GetTimeOfDay(&ldap_state->last_rebind);
 675
 676         return 0;
 677 }
 678 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 679
 680 /*******************************************************************
 681  a rebind function for authenticated referrals
 682  This version takes a void* that we can shove useful stuff in :-)
 683  and actually does the connection.
 684 ******************************************************************/
 685 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 686 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 687                                           LDAP_CONST char *url,
 688                                           ber_tag_t request,
 689                                           ber_int_t msgid, void *arg)
 690 {
 691         struct smbldap_state *ldap_state = arg;
 692         int rc;
 693         DEBUG(5,("rebindproc_connect_with_state: Rebinding as \"%s\"\n",
 694                  ldap_state->bind_dn));
 695
 696         /** @TODO Should we be doing something to check what servers we rebind to?
 697             Could we get a referral to a machine that we don't want to give our
 698             username and password to? */
 699
 700         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 701
 702         GetTimeOfDay(&ldap_state->last_rebind);
 703
 704         return rc;
 705 }
 706 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 707
 708 /*******************************************************************
 709  Add a rebind function for authenticated referrals
 710 ******************************************************************/
 711 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 712 #else
 713 # if LDAP_SET_REBIND_PROC_ARGS == 2
 714 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 715                        int *method, int freeit )
 716 {
 717         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 718
 719         return rebindproc_with_state(ldap_struct, whop, credp,
 720                                      method, freeit, ldap_state);
 721
 722 }
 723 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 724 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 725
 726 /*******************************************************************
 727  a rebind function for authenticated referrals
 728  this also does the connection, but no void*.
 729 ******************************************************************/
 730 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 731 # if LDAP_SET_REBIND_PROC_ARGS == 2
 732 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 733                                ber_int_t msgid)
 734 {
 735         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 736
 737         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 738                                              ldap_state);
 739 }
 740 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 741 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 742
 743 /*******************************************************************
 744  connect to the ldap server under system privilege.
 745 ******************************************************************/
 746 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 747 {
 748         int rc;
 749         char *ldap_dn;
 750         char *ldap_secret;
 751         int version;
 752
 753         /* get the password */
 754         if (!fetch_ldap_pw(&ldap_dn, &ldap_secret)) {
 755                 DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 756                 return LDAP_INVALID_CREDENTIALS;
 757         }
 758
 759         ldap_state->bind_dn = ldap_dn;
 760         ldap_state->bind_secret = ldap_secret;
 761
 762         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 763            (OpenLDAP) doesnt' seem to support it */
 764
 765         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 766                   ldap_state->uri, ldap_dn));
 767
 768 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 769 # if LDAP_SET_REBIND_PROC_ARGS == 2
 770         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 771 # endif
 772 # if LDAP_SET_REBIND_PROC_ARGS == 3
 773         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 774 # endif
 775 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 776 # if LDAP_SET_REBIND_PROC_ARGS == 2
 777         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 778 # endif
 779 # if LDAP_SET_REBIND_PROC_ARGS == 3
 780         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 781 # endif
 782 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 783
 784         rc = ldap_simple_bind_s(ldap_struct, ldap_dn, ldap_secret);
 785
 786         if (rc != LDAP_SUCCESS) {
 787                 char *ld_error = NULL;
 788                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 789                                 &ld_error);
 790                 DEBUG(ldap_state->num_failures ? 2 : 0,
 791                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
 792                                ldap_state->uri,
 793                                ldap_dn ? ldap_dn : "(unknown)", ldap_err2string(rc),
 794                                ld_error ? ld_error : "(unknown)"));
 795                 SAFE_FREE(ld_error);
 796                 ldap_state->num_failures++;
 797                 return rc;
 798         }
 799
 800         ldap_state->num_failures = 0;
 801         ldap_state->paged_results = False;
 802
 803         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 804
 805         if (smbldap_has_control(ldap_state, ADS_PAGE_CTL_OID) && version == 3) {
 806                 ldap_state->paged_results = True;
 807         }
 808
 809         DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n"));
 810         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
 811                 ldap_state->paged_results ? "does" : "does not"));
 812         return rc;
 813 }
 814
 815 /**********************************************************************
 816  Connect to LDAP server (called before every ldap operation)
 817 *********************************************************************/
 818 static int smbldap_open(struct smbldap_state *ldap_state)
 819 {
 820         int rc, opt_rc;
 821         BOOL reopen = False;
 822         SMB_ASSERT(ldap_state);
 823
 824 #ifndef NO_LDAP_SECURITY
 825         if (geteuid() != 0) {
 826                 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
 827                 return  LDAP_INSUFFICIENT_ACCESS;
 828         }
 829 #endif
 830
 831         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
 832
 833                 struct sockaddr_un addr;
 834                 socklen_t len = sizeof(addr);
 835                 int sd;
 836
 837                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
 838                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
 839                         reopen = True;
 840
 841 #ifdef HAVE_UNIXSOCKET
 842                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
 843                         reopen = True;
 844 #endif
 845                 if (reopen) {
 846                         /* the other end has died. reopen. */
 847                         ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 848                         ldap_state->ldap_struct = NULL;
 849                         ldap_state->last_ping = (time_t)0;
 850                 } else {
 851                         ldap_state->last_ping = time(NULL);
 852                 }
 853         }
 854
 855         if (ldap_state->ldap_struct != NULL) {
 856                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
 857                 return LDAP_SUCCESS;
 858         }
 859
 860         if ((rc = smbldap_open_connection(ldap_state))) {
 861                 return rc;
 862         }
 863
 864         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
 865                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 866                 ldap_state->ldap_struct = NULL;
 867                 return rc;
 868         }
 869
 870
 871         ldap_state->last_ping = time(NULL);
 872         ldap_state->pid = sys_getpid();
 873         DEBUG(4,("The LDAP server is succesfully connected\n"));
 874
 875         return LDAP_SUCCESS;
 876 }
 877
 878 /**********************************************************************
 879 Disconnect from LDAP server
 880 *********************************************************************/
 881 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
 882 {
 883         if (!ldap_state)
 884                 return NT_STATUS_INVALID_PARAMETER;
 885
 886         if (ldap_state->ldap_struct != NULL) {
 887                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 888                 ldap_state->ldap_struct = NULL;
 889         }
 890
 891         smbldap_delete_state(ldap_state);
 892
 893         DEBUG(5,("The connection to the LDAP server was closed\n"));
 894         /* maybe free the results here --metze */
 895
 896
 897
 898         return NT_STATUS_OK;
 899 }
 900
 901 static BOOL got_alarm;
 902
 903 static void (*old_handler)(int);
 904
 905 static void gotalarm_sig(int dummy)
 906 {
 907         got_alarm = True;
 908 }
 909
 910 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
 911                             int *attempts, time_t endtime)
 912 {
 913         time_t now = time(NULL);
 914         int open_rc = LDAP_SERVER_DOWN;
 915
 916         if (*rc != LDAP_SERVER_DOWN)
 917                 goto no_next;
 918
 919         if (now >= endtime) {
 920                 smbldap_close(ldap_state);
 921                 *rc = LDAP_TIMEOUT;
 922                 goto no_next;
 923         }
 924
 925         if (*attempts == 0) {
 926                 got_alarm = False;
 927                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
 928                 alarm(endtime - now);
 929
 930                 if (ldap_state->pid != sys_getpid())
 931                         smbldap_close(ldap_state);
 932         }
 933
 934         while (1) {
 935
 936                 if (*attempts != 0)
 937                         smb_msleep(1000);
 938
 939                 *attempts += 1;
 940
 941                 open_rc = smbldap_open(ldap_state);
 942
 943                 if (open_rc == LDAP_SUCCESS) {
 944                         ldap_state->last_use = now;
 945                         return True;
 946                 }
 947
 948                 if (got_alarm) {
 949                         *rc = LDAP_TIMEOUT;
 950                         break;
 951                 }
 952
 953                 if (open_rc != LDAP_SUCCESS) {
 954                         DEBUG(1, ("Connection to LDAP server failed for the "
 955                                   "%d try!\n", *attempts));
 956                 }
 957         }
 958
 959  no_next:
 960         CatchSignal(SIGALRM, old_handler);
 961         alarm(0);
 962         ldap_state->last_use = now;
 963         return False;
 964 }
 965
 966 /*********************************************************************
 967  ********************************************************************/
 968
 969 static int smbldap_search_ext(struct smbldap_state *ldap_state,
 970                               const char *base, int scope, const char *filter,
 971                               const char *attrs[], int attrsonly,
 972                               LDAPControl **sctrls, LDAPControl **cctrls,
 973                               int sizelimit, LDAPMessage **res)
 974 {
 975         int             rc = LDAP_SERVER_DOWN;
 976         int             attempts = 0;
 977         char           *utf8_filter;
 978         time_t          endtime = time(NULL)+lp_ldap_timeout();
 979         struct          timeval timeout;
 980
 981         SMB_ASSERT(ldap_state);
 982
 983         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
 984                  "scope => [%d]\n", base, filter, scope));
 985
 986         if (ldap_state->last_rebind.tv_sec > 0) {
 987                 struct timeval  tval;
 988                 SMB_BIG_INT     tdiff = 0;
 989                 int             sleep_time = 0;
 990
 991                 ZERO_STRUCT(tval);
 992                 GetTimeOfDay(&tval);
 993
 994                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
 995                 tdiff /= 1000; /* Convert to milliseconds. */
 996
 997                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
 998                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
 999
1000                 if (sleep_time > 0) {
1001                         /* we wait for the LDAP replication */
1002                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1003                                  "for LDAP replication.\n",sleep_time));
1004                         smb_msleep(sleep_time);
1005                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1006                 }
1007                 ZERO_STRUCT(ldap_state->last_rebind);
1008         }
1009
1010         if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
1011                 return LDAP_NO_MEMORY;
1012         }
1013
1014         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1015         timeout.tv_sec = lp_ldap_timeout();
1016         timeout.tv_usec = 0;
1017
1018         /* Setup alarm timeout.... Do we need both of these ? JRA.
1019          * Yes, I think we do need both of these. The server timeout only
1020          * covers the case where the server's operation takes too long. It
1021          * does not cover the case where the request hangs on its way to the
1022          * server. The server side timeout is not strictly necessary, it's
1023          * just a bit more kind to the server. VL. */
1024
1025         got_alarm = 0;
1026         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1027         alarm(lp_ldap_timeout());
1028         /* End setup timeout. */
1029
1030         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1031                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1032                                        utf8_filter,
1033                                        CONST_DISCARD(char **, attrs),
1034                                        attrsonly, sctrls, cctrls, &timeout,
1035                                        sizelimit, res);
1036
1037         SAFE_FREE(utf8_filter);
1038
1039         /* Teardown timeout. */
1040         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1041         alarm(0);
1042
1043         if (got_alarm != 0)
1044                 return LDAP_TIMELIMIT_EXCEEDED;
1045
1046         return rc;
1047 }
1048
1049 int smbldap_search(struct smbldap_state *ldap_state,
1050                    const char *base, int scope, const char *filter,
1051                    const char *attrs[], int attrsonly,
1052                    LDAPMessage **res)
1053 {
1054         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1055                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1056 }
1057
1058 int smbldap_search_paged(struct smbldap_state *ldap_state,
1059                          const char *base, int scope, const char *filter,
1060                          const char **attrs, int attrsonly, int pagesize,
1061                          LDAPMessage **res, void **cookie)
1062 {
1063         LDAPControl     pr;
1064         LDAPControl     **rcontrols;
1065         LDAPControl     *controls[2] = { NULL, NULL};
1066         BerElement      *cookie_be = NULL;
1067         struct berval   *cookie_bv = NULL;
1068         int             tmp = 0, i, rc;
1069         BOOL            critical = True;
1070
1071         *res = NULL;
1072
1073         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1074                  "scope => [%d], pagesize => [%d]\n",
1075                  base, filter, scope, pagesize));
1076
1077         cookie_be = ber_alloc_t(LBER_USE_DER);
1078         if (cookie_be == NULL) {
1079                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1080                          "NULL\n"));
1081                 return LDAP_NO_MEMORY;
1082         }
1083
1084         /* construct cookie */
1085         if (*cookie != NULL) {
1086                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1087                 ber_bvfree(*cookie); /* don't need it from last time */
1088                 *cookie = NULL;
1089         } else {
1090                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1091         }
1092         ber_flatten(cookie_be, &cookie_bv);
1093
1094         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1095         pr.ldctl_iscritical = (char) critical;
1096         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1097         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1098
1099         controls[0] = &pr;
1100         controls[1] = NULL;
1101
1102         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1103                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1104
1105         ber_free(cookie_be, 1);
1106         ber_bvfree(cookie_bv);
1107
1108         if (rc != 0) {
1109                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1110                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1111                 goto done;
1112         }
1113
1114         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1115
1116         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1117                                NULL, NULL, &rcontrols,  0);
1118         if (rc != 0) {
1119                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1120                          "with [%s]\n", ldap_err2string(rc)));
1121                 goto done;
1122         }
1123
1124         if (rcontrols == NULL)
1125                 goto done;
1126
1127         for (i=0; rcontrols[i]; i++) {
1128
1129                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1130                         continue;
1131
1132                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1133                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1134                 /* the berval is the cookie, but must be freed when it is all
1135                    done */
1136                 if (cookie_bv->bv_len)
1137                         *cookie=ber_bvdup(cookie_bv);
1138                 else
1139                         *cookie=NULL;
1140                 ber_bvfree(cookie_bv);
1141                 ber_free(cookie_be, 1);
1142                 break;
1143         }
1144         ldap_controls_free(rcontrols);
1145 done:
1146         return rc;
1147 }
1148
1149 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1150 {
1151         int             rc = LDAP_SERVER_DOWN;
1152         int             attempts = 0;
1153         char           *utf8_dn;
1154         time_t          endtime = time(NULL)+lp_ldap_timeout();
1155
1156         SMB_ASSERT(ldap_state);
1157
1158         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1159
1160         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1161                 return LDAP_NO_MEMORY;
1162         }
1163
1164         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1165                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1166
1167         SAFE_FREE(utf8_dn);
1168         return rc;
1169 }
1170
1171 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1172 {
1173         int             rc = LDAP_SERVER_DOWN;
1174         int             attempts = 0;
1175         char           *utf8_dn;
1176         time_t          endtime = time(NULL)+lp_ldap_timeout();
1177
1178         SMB_ASSERT(ldap_state);
1179
1180         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1181
1182         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1183                 return LDAP_NO_MEMORY;
1184         }
1185
1186         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1187                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1188
1189         SAFE_FREE(utf8_dn);
1190         return rc;
1191 }
1192
1193 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1194 {
1195         int             rc = LDAP_SERVER_DOWN;
1196         int             attempts = 0;
1197         char           *utf8_dn;
1198         time_t          endtime = time(NULL)+lp_ldap_timeout();
1199
1200         SMB_ASSERT(ldap_state);
1201
1202         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1203
1204         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1205                 return LDAP_NO_MEMORY;
1206         }
1207
1208         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1209                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1210
1211         SAFE_FREE(utf8_dn);
1212         return rc;
1213 }
1214
1215 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1216                                LDAP_CONST char *reqoid, struct berval *reqdata,
1217                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1218                                char **retoidp, struct berval **retdatap)
1219 {
1220         int             rc = LDAP_SERVER_DOWN;
1221         int             attempts = 0;
1222         time_t          endtime = time(NULL)+lp_ldap_timeout();
1223
1224         if (!ldap_state)
1225                 return (-1);
1226
1227         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1228                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1229                                                reqdata, serverctrls,
1230                                                clientctrls, retoidp, retdatap);
1231         return rc;
1232 }
1233
1234 /*******************************************************************
1235  run the search by name.
1236 ******************************************************************/
1237 int smbldap_search_suffix (struct smbldap_state *ldap_state, const char *filter,
1238                            const char **search_attr, LDAPMessage ** result)
1239 {
1240         int scope = LDAP_SCOPE_SUBTREE;
1241         int rc;
1242
1243         rc = smbldap_search(ldap_state, lp_ldap_suffix(), scope, filter, search_attr, 0, result);
1244
1245         if (rc != LDAP_SUCCESS) {
1246                 char *ld_error = NULL;
1247                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1248                                 &ld_error);
1249                 DEBUG(0,("smbldap_search_suffix: Problem during the LDAP search: %s (%s)\n",
1250                         ld_error?ld_error:"(unknown)", ldap_err2string (rc)));
1251                 SAFE_FREE(ld_error);
1252         }
1253
1254         return rc;
1255 }
1256
1257 static void smbldap_idle_fn(void **data, time_t *interval, time_t now)
1258 {
1259         struct smbldap_state *state = (struct smbldap_state *)(*data);
1260
1261         if (state->ldap_struct == NULL) {
1262                 DEBUG(10,("ldap connection not connected...\n"));
1263                 return;
1264         }
1265
1266         if ((state->last_use+SMBLDAP_IDLE_TIME) > now) {
1267                 DEBUG(10,("ldap connection not idle...\n"));
1268                 return;
1269         }
1270
1271         DEBUG(7,("ldap connection idle...closing connection\n"));
1272         smbldap_close(state);
1273 }
1274
1275 /**********************************************************************
1276  Housekeeping
1277  *********************************************************************/
1278
1279 void smbldap_free_struct(struct smbldap_state **ldap_state)
1280 {
1281         smbldap_close(*ldap_state);
1282
1283         if ((*ldap_state)->bind_secret) {
1284                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1285         }
1286
1287         SAFE_FREE((*ldap_state)->bind_dn);
1288         SAFE_FREE((*ldap_state)->bind_secret);
1289
1290         smb_unregister_idle_event((*ldap_state)->event_id);
1291
1292         *ldap_state = NULL;
1293
1294         /* No need to free any further, as it is talloc()ed */
1295 }
1296
1297
1298 /**********************************************************************
1299  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1300  *********************************************************************/
1301
1302 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, const char *location, struct smbldap_state **smbldap_state)
1303 {
1304         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1305         if (!*smbldap_state) {
1306                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1307                 return NT_STATUS_NO_MEMORY;
1308         }
1309
1310         if (location) {
1311                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1312         } else {
1313                 (*smbldap_state)->uri = "ldap://localhost";
1314         }
1315
1316         (*smbldap_state)->event_id =
1317                 smb_register_idle_event(smbldap_idle_fn, (void *)(*smbldap_state),
1318                                         SMBLDAP_IDLE_TIME);
1319
1320         if ((*smbldap_state)->event_id == SMB_EVENT_ID_INVALID) {
1321                 DEBUG(0,("Failed to register LDAP idle event!\n"));
1322                 return NT_STATUS_INVALID_HANDLE;
1323         }
1324
1325         return NT_STATUS_OK;
1326 }
1327
1328 /*******************************************************************
1329  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1330 ********************************************************************/
1331
1332 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1333 {
1334         char *utf8_dn, *unix_dn;
1335
1336         utf8_dn = ldap_get_dn(ld, entry);
1337         if (!utf8_dn) {
1338                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1339                 return NULL;
1340         }
1341         if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
1342                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
1343                 return NULL;
1344         }
1345         ldap_memfree(utf8_dn);
1346         return unix_dn;
1347 }
1348
1349 /*******************************************************************
1350  Check if root-dse has a certain Control or Extension
1351 ********************************************************************/
1352
1353 static BOOL smbldap_check_root_dse(struct smbldap_state *ldap_state, const char **attrs, const char *value)
1354 {
1355         LDAPMessage *msg = NULL;
1356         LDAPMessage *entry = NULL;
1357         char **values = NULL;
1358         int rc, num_result, num_values, i;
1359         BOOL result = False;
1360
1361         if (!attrs[0]) {
1362                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1363                 return False;
1364         }
1365
1366         if (!strequal(attrs[0], "supportedExtension") &&
1367             !strequal(attrs[0], "supportedControl") &&
1368             !strequal(attrs[0], "namingContexts")) {
1369                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1370                 return False;
1371         }
1372
1373         rc = ldap_search_s(ldap_state->ldap_struct, "", LDAP_SCOPE_BASE,
1374                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1375
1376         if (rc != LDAP_SUCCESS) {
1377                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1378                 return False;
1379         }
1380
1381         num_result = ldap_count_entries(ldap_state->ldap_struct, msg);
1382
1383         if (num_result != 1) {
1384                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1385                 goto done;
1386         }
1387
1388         entry = ldap_first_entry(ldap_state->ldap_struct, msg);
1389
1390         if (entry == NULL) {
1391                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1392                 goto done;
1393         }
1394
1395         values = ldap_get_values(ldap_state->ldap_struct, entry, attrs[0]);
1396
1397         if (values == NULL) {
1398                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1399                 goto done;
1400         }
1401
1402         num_values = ldap_count_values(values);
1403
1404         if (num_values == 0) {
1405                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1406                 goto done;
1407         }
1408
1409         for (i=0; i<num_values; i++) {
1410                 if (strcmp(values[i], value) == 0)
1411                         result = True;
1412         }
1413
1414
1415  done:
1416         if (values != NULL)
1417                 ldap_value_free(values);
1418         if (msg != NULL)
1419                 ldap_msgfree(msg);
1420
1421         return result;
1422
1423 }
1424
1425 /*******************************************************************
1426  Check if LDAP-Server supports a certain Control (OID in string format)
1427 ********************************************************************/
1428
1429 BOOL smbldap_has_control(struct smbldap_state *ldap_state, const char *control)
1430 {
1431         const char *attrs[] = { "supportedControl", NULL };
1432         return smbldap_check_root_dse(ldap_state, attrs, control);
1433 }
1434
1435 /*******************************************************************
1436  Check if LDAP-Server supports a certain Extension (OID in string format)
1437 ********************************************************************/
1438
1439 BOOL smbldap_has_extension(struct smbldap_state *ldap_state, const char *extension)
1440 {
1441         const char *attrs[] = { "supportedExtension", NULL };
1442         return smbldap_check_root_dse(ldap_state, attrs, extension);
1443 }
1444
1445 /*******************************************************************
1446  Check if LDAP-Server holds a given namingContext
1447 ********************************************************************/
1448
1449 BOOL smbldap_has_naming_context(struct smbldap_state *ldap_state, const char *naming_context)
1450 {
1451         const char *attrs[] = { "namingContexts", NULL };
1452         return smbldap_check_root_dse(ldap_state, attrs, naming_context);
1453 }