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  start TLS on an existing LDAP connection
 528 *******************************************************************/
 529
 530 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 531 {
 532         int rc;
 533
 534         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 535                 return LDAP_SUCCESS;
 536         }
 537
 538 #ifdef LDAP_OPT_X_TLS
 539         if (version != LDAP_VERSION3) {
 540                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 541                 return LDAP_OPERATIONS_ERROR;
 542         }
 543
 544         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 545                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 546                          ldap_err2string(rc)));
 547                 return rc;
 548         }
 549
 550         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 551         return LDAP_SUCCESS;
 552 #else
 553         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 554         return LDAP_OPERATIONS_ERROR;
 555 #endif
 556 }
 557
 558 /********************************************************************
 559  setup a connection to the LDAP server based on a uri
 560 *******************************************************************/
 561
 562 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 563 {
 564         int rc;
 565
 566         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 567
 568 #ifdef HAVE_LDAP_INITIALIZE
 569
 570         rc = ldap_initialize(ldap_struct, uri);
 571         if (rc) {
 572                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 573         }
 574
 575         return rc;
 576 #else
 577
 578         /* Parse the string manually */
 579
 580         {
 581                 int port = 0;
 582                 fstring protocol;
 583                 fstring host;
 584                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 585
 586
 587                 /* skip leading "URL:" (if any) */
 588                 if ( strnequal( uri, "URL:", 4 ) ) {
 589                         uri += 4;
 590                 }
 591
 592                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 593
 594                 if (port == 0) {
 595                         if (strequal(protocol, "ldap")) {
 596                                 port = LDAP_PORT;
 597                         } else if (strequal(protocol, "ldaps")) {
 598                                 port = LDAPS_PORT;
 599                         } else {
 600                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 601                         }
 602                 }
 603
 604                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 605                         DEBUG(0, ("ldap_init failed !\n"));
 606                         return LDAP_OPERATIONS_ERROR;
 607                 }
 608
 609                 if (strequal(protocol, "ldaps")) {
 610 #ifdef LDAP_OPT_X_TLS
 611                         int tls = LDAP_OPT_X_TLS_HARD;
 612                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 613                         {
 614                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 615                         }
 616
 617                         DEBUG(3,("LDAPS option set...!\n"));
 618 #else
 619                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 620                         return LDAP_OPERATIONS_ERROR;
 621 #endif /* LDAP_OPT_X_TLS */
 622                 }
 623
 624         }
 625 #endif /* HAVE_LDAP_INITIALIZE */
 626         return LDAP_SUCCESS;
 627 }
 628
 629 /********************************************************************
 630  try to upgrade to Version 3 LDAP if not already, in either case return current
 631  version
 632  *******************************************************************/
 633
 634 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 635 {
 636         int version;
 637         int rc;
 638
 639         /* assume the worst */
 640         *new_version = LDAP_VERSION2;
 641
 642         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 643         if (rc) {
 644                 return rc;
 645         }
 646
 647         if (version == LDAP_VERSION3) {
 648                 *new_version = LDAP_VERSION3;
 649                 return LDAP_SUCCESS;
 650         }
 651
 652         /* try upgrade */
 653         version = LDAP_VERSION3;
 654         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 655         if (rc) {
 656                 return rc;
 657         }
 658
 659         *new_version = LDAP_VERSION3;
 660         return LDAP_SUCCESS;
 661 }
 662
 663 /*******************************************************************
 664  open a connection to the ldap server (just until the bind)
 665  ******************************************************************/
 666
 667 int smb_ldap_setup_full_conn(LDAP *ldap_struct, const char *uri)
 668 {
 669         int rc, version;
 670
 671         rc = smb_ldap_setup_conn(&ldap_struct, uri);
 672         if (rc) {
 673                 return rc;
 674         }
 675
 676         rc = smb_ldap_upgrade_conn(ldap_struct, &version);
 677         if (rc) {
 678                 return rc;
 679         }
 680
 681         rc = smb_ldap_start_tls(ldap_struct, version);
 682         if (rc) {
 683                 return rc;
 684         }
 685
 686         return LDAP_SUCCESS;
 687 }
 688
 689 /*******************************************************************
 690  open a connection to the ldap server.
 691 ******************************************************************/
 692 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 693
 694 {
 695         int rc = LDAP_SUCCESS;
 696         int version;
 697         LDAP **ldap_struct = &ldap_state->ldap_struct;
 698
 699         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 700         if (rc) {
 701                 return rc;
 702         }
 703
 704         /* Store the LDAP pointer in a lookup list */
 705
 706         smbldap_store_state(*ldap_struct, ldap_state);
 707
 708         /* Upgrade to LDAPv3 if possible */
 709
 710         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 711         if (rc) {
 712                 return rc;
 713         }
 714
 715         /* Start TLS if required */
 716
 717         rc = smb_ldap_start_tls(*ldap_struct, version);
 718         if (rc) {
 719                 return rc;
 720         }
 721
 722         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 723         return rc;
 724 }
 725
 726 /*******************************************************************
 727  a rebind function for authenticated referrals
 728  This version takes a void* that we can shove useful stuff in :-)
 729 ******************************************************************/
 730 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 731 #else
 732 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 733                                    int *methodp, int freeit, void *arg)
 734 {
 735         struct smbldap_state *ldap_state = arg;
 736
 737         /** @TODO Should we be doing something to check what servers we rebind to?
 738             Could we get a referral to a machine that we don't want to give our
 739             username and password to? */
 740
 741         if (freeit) {
 742                 SAFE_FREE(*whop);
 743                 memset(*credp, '\0', strlen(*credp));
 744                 SAFE_FREE(*credp);
 745         } else {
 746                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 747                           ldap_state->bind_dn));
 748
 749                 *whop = SMB_STRDUP(ldap_state->bind_dn);
 750                 if (!*whop) {
 751                         return LDAP_NO_MEMORY;
 752                 }
 753                 *credp = SMB_STRDUP(ldap_state->bind_secret);
 754                 if (!*credp) {
 755                         SAFE_FREE(*whop);
 756                         return LDAP_NO_MEMORY;
 757                 }
 758                 *methodp = LDAP_AUTH_SIMPLE;
 759         }
 760
 761         GetTimeOfDay(&ldap_state->last_rebind);
 762
 763         return 0;
 764 }
 765 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 766
 767 /*******************************************************************
 768  a rebind function for authenticated referrals
 769  This version takes a void* that we can shove useful stuff in :-)
 770  and actually does the connection.
 771 ******************************************************************/
 772 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 773 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 774                                           LDAP_CONST char *url,
 775                                           ber_tag_t request,
 776                                           ber_int_t msgid, void *arg)
 777 {
 778         struct smbldap_state *ldap_state = arg;
 779         int rc;
 780         DEBUG(5,("rebindproc_connect_with_state: Rebinding as \"%s\"\n",
 781                  ldap_state->bind_dn));
 782
 783         /** @TODO Should we be doing something to check what servers we rebind to?
 784             Could we get a referral to a machine that we don't want to give our
 785             username and password to? */
 786
 787         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 788
 789         GetTimeOfDay(&ldap_state->last_rebind);
 790
 791         return rc;
 792 }
 793 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 794
 795 /*******************************************************************
 796  Add a rebind function for authenticated referrals
 797 ******************************************************************/
 798 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 799 #else
 800 # if LDAP_SET_REBIND_PROC_ARGS == 2
 801 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 802                        int *method, int freeit )
 803 {
 804         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 805
 806         return rebindproc_with_state(ldap_struct, whop, credp,
 807                                      method, freeit, ldap_state);
 808
 809 }
 810 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 811 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 812
 813 /*******************************************************************
 814  a rebind function for authenticated referrals
 815  this also does the connection, but no void*.
 816 ******************************************************************/
 817 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 818 # if LDAP_SET_REBIND_PROC_ARGS == 2
 819 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 820                                ber_int_t msgid)
 821 {
 822         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 823
 824         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 825                                              ldap_state);
 826 }
 827 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 828 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 829
 830 /*******************************************************************
 831  connect to the ldap server under system privilege.
 832 ******************************************************************/
 833 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 834 {
 835         int rc;
 836         char *ldap_dn;
 837         char *ldap_secret;
 838         int version;
 839
 840         /* get the password */
 841         if (!fetch_ldap_pw(&ldap_dn, &ldap_secret)) {
 842                 DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 843                 return LDAP_INVALID_CREDENTIALS;
 844         }
 845
 846         ldap_state->bind_dn = ldap_dn;
 847         ldap_state->bind_secret = ldap_secret;
 848
 849         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 850            (OpenLDAP) doesnt' seem to support it */
 851
 852         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 853                   ldap_state->uri, ldap_dn));
 854
 855 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 856 # if LDAP_SET_REBIND_PROC_ARGS == 2
 857         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 858 # endif
 859 # if LDAP_SET_REBIND_PROC_ARGS == 3
 860         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 861 # endif
 862 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 863 # if LDAP_SET_REBIND_PROC_ARGS == 2
 864         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 865 # endif
 866 # if LDAP_SET_REBIND_PROC_ARGS == 3
 867         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 868 # endif
 869 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 870
 871         rc = ldap_simple_bind_s(ldap_struct, ldap_dn, ldap_secret);
 872
 873         if (rc != LDAP_SUCCESS) {
 874                 char *ld_error = NULL;
 875                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 876                                 &ld_error);
 877                 DEBUG(ldap_state->num_failures ? 2 : 0,
 878                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
 879                                ldap_state->uri,
 880                                ldap_dn ? ldap_dn : "(unknown)", ldap_err2string(rc),
 881                                ld_error ? ld_error : "(unknown)"));
 882                 SAFE_FREE(ld_error);
 883                 ldap_state->num_failures++;
 884                 return rc;
 885         }
 886
 887         ldap_state->num_failures = 0;
 888         ldap_state->paged_results = False;
 889
 890         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 891
 892         if (smbldap_has_control(ldap_state, ADS_PAGE_CTL_OID) && version == 3) {
 893                 ldap_state->paged_results = True;
 894         }
 895
 896         DEBUG(3, ("ldap_connect_system: succesful connection to the LDAP server\n"));
 897         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
 898                 ldap_state->paged_results ? "does" : "does not"));
 899         return rc;
 900 }
 901
 902 /**********************************************************************
 903  Connect to LDAP server (called before every ldap operation)
 904 *********************************************************************/
 905 static int smbldap_open(struct smbldap_state *ldap_state)
 906 {
 907         int rc, opt_rc;
 908         BOOL reopen = False;
 909         SMB_ASSERT(ldap_state);
 910
 911 #ifndef NO_LDAP_SECURITY
 912         if (geteuid() != 0) {
 913                 DEBUG(0, ("smbldap_open: cannot access LDAP when not root..\n"));
 914                 return  LDAP_INSUFFICIENT_ACCESS;
 915         }
 916 #endif
 917
 918         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
 919
 920                 struct sockaddr_un addr;
 921                 socklen_t len = sizeof(addr);
 922                 int sd;
 923
 924                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
 925                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
 926                         reopen = True;
 927
 928 #ifdef HAVE_UNIXSOCKET
 929                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
 930                         reopen = True;
 931 #endif
 932                 if (reopen) {
 933                         /* the other end has died. reopen. */
 934                         ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 935                         ldap_state->ldap_struct = NULL;
 936                         ldap_state->last_ping = (time_t)0;
 937                 } else {
 938                         ldap_state->last_ping = time(NULL);
 939                 }
 940         }
 941
 942         if (ldap_state->ldap_struct != NULL) {
 943                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
 944                 return LDAP_SUCCESS;
 945         }
 946
 947         if ((rc = smbldap_open_connection(ldap_state))) {
 948                 return rc;
 949         }
 950
 951         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
 952                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 953                 ldap_state->ldap_struct = NULL;
 954                 return rc;
 955         }
 956
 957
 958         ldap_state->last_ping = time(NULL);
 959         ldap_state->pid = sys_getpid();
 960         DEBUG(4,("The LDAP server is succesfully connected\n"));
 961
 962         return LDAP_SUCCESS;
 963 }
 964
 965 /**********************************************************************
 966 Disconnect from LDAP server
 967 *********************************************************************/
 968 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
 969 {
 970         if (!ldap_state)
 971                 return NT_STATUS_INVALID_PARAMETER;
 972
 973         if (ldap_state->ldap_struct != NULL) {
 974                 ldap_unbind_ext(ldap_state->ldap_struct, NULL, NULL);
 975                 ldap_state->ldap_struct = NULL;
 976         }
 977
 978         smbldap_delete_state(ldap_state);
 979
 980         DEBUG(5,("The connection to the LDAP server was closed\n"));
 981         /* maybe free the results here --metze */
 982
 983
 984
 985         return NT_STATUS_OK;
 986 }
 987
 988 static BOOL got_alarm;
 989
 990 static void (*old_handler)(int);
 991
 992 static void gotalarm_sig(int dummy)
 993 {
 994         got_alarm = True;
 995 }
 996
 997 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
 998                             int *attempts, time_t endtime)
 999 {
1000         time_t now = time(NULL);
1001         int open_rc = LDAP_SERVER_DOWN;
1002
1003         if (*rc != LDAP_SERVER_DOWN)
1004                 goto no_next;
1005
1006         if (now >= endtime) {
1007                 smbldap_close(ldap_state);
1008                 *rc = LDAP_TIMEOUT;
1009                 goto no_next;
1010         }
1011
1012         if (*attempts == 0) {
1013                 got_alarm = False;
1014                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1015                 alarm(endtime - now);
1016
1017                 if (ldap_state->pid != sys_getpid())
1018                         smbldap_close(ldap_state);
1019         }
1020
1021         while (1) {
1022
1023                 if (*attempts != 0)
1024                         smb_msleep(1000);
1025
1026                 *attempts += 1;
1027
1028                 open_rc = smbldap_open(ldap_state);
1029
1030                 if (open_rc == LDAP_SUCCESS) {
1031                         ldap_state->last_use = now;
1032                         return True;
1033                 }
1034
1035                 if (got_alarm) {
1036                         *rc = LDAP_TIMEOUT;
1037                         break;
1038                 }
1039
1040                 if (open_rc != LDAP_SUCCESS) {
1041                         DEBUG(1, ("Connection to LDAP server failed for the "
1042                                   "%d try!\n", *attempts));
1043                 }
1044         }
1045
1046  no_next:
1047         CatchSignal(SIGALRM, old_handler);
1048         alarm(0);
1049         ldap_state->last_use = now;
1050         return False;
1051 }
1052
1053 /*********************************************************************
1054  ********************************************************************/
1055
1056 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1057                               const char *base, int scope, const char *filter,
1058                               const char *attrs[], int attrsonly,
1059                               LDAPControl **sctrls, LDAPControl **cctrls,
1060                               int sizelimit, LDAPMessage **res)
1061 {
1062         int             rc = LDAP_SERVER_DOWN;
1063         int             attempts = 0;
1064         char           *utf8_filter;
1065         time_t          endtime = time(NULL)+lp_ldap_timeout();
1066         struct          timeval timeout;
1067
1068         SMB_ASSERT(ldap_state);
1069
1070         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1071                  "scope => [%d]\n", base, filter, scope));
1072
1073         if (ldap_state->last_rebind.tv_sec > 0) {
1074                 struct timeval  tval;
1075                 SMB_BIG_INT     tdiff = 0;
1076                 int             sleep_time = 0;
1077
1078                 ZERO_STRUCT(tval);
1079                 GetTimeOfDay(&tval);
1080
1081                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1082                 tdiff /= 1000; /* Convert to milliseconds. */
1083
1084                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1085                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1086
1087                 if (sleep_time > 0) {
1088                         /* we wait for the LDAP replication */
1089                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1090                                  "for LDAP replication.\n",sleep_time));
1091                         smb_msleep(sleep_time);
1092                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1093                 }
1094                 ZERO_STRUCT(ldap_state->last_rebind);
1095         }
1096
1097         if (push_utf8_allocate(&utf8_filter, filter) == (size_t)-1) {
1098                 return LDAP_NO_MEMORY;
1099         }
1100
1101         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1102         timeout.tv_sec = lp_ldap_timeout();
1103         timeout.tv_usec = 0;
1104
1105         /* Setup alarm timeout.... Do we need both of these ? JRA.
1106          * Yes, I think we do need both of these. The server timeout only
1107          * covers the case where the server's operation takes too long. It
1108          * does not cover the case where the request hangs on its way to the
1109          * server. The server side timeout is not strictly necessary, it's
1110          * just a bit more kind to the server. VL. */
1111
1112         got_alarm = 0;
1113         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1114         alarm(lp_ldap_timeout());
1115         /* End setup timeout. */
1116
1117         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1118                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1119                                        utf8_filter,
1120                                        CONST_DISCARD(char **, attrs),
1121                                        attrsonly, sctrls, cctrls, &timeout,
1122                                        sizelimit, res);
1123
1124         SAFE_FREE(utf8_filter);
1125
1126         /* Teardown timeout. */
1127         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1128         alarm(0);
1129
1130         if (got_alarm != 0)
1131                 return LDAP_TIMELIMIT_EXCEEDED;
1132
1133         return rc;
1134 }
1135
1136 int smbldap_search(struct smbldap_state *ldap_state,
1137                    const char *base, int scope, const char *filter,
1138                    const char *attrs[], int attrsonly,
1139                    LDAPMessage **res)
1140 {
1141         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1142                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1143 }
1144
1145 int smbldap_search_paged(struct smbldap_state *ldap_state,
1146                          const char *base, int scope, const char *filter,
1147                          const char **attrs, int attrsonly, int pagesize,
1148                          LDAPMessage **res, void **cookie)
1149 {
1150         LDAPControl     pr;
1151         LDAPControl     **rcontrols;
1152         LDAPControl     *controls[2] = { NULL, NULL};
1153         BerElement      *cookie_be = NULL;
1154         struct berval   *cookie_bv = NULL;
1155         int             tmp = 0, i, rc;
1156         BOOL            critical = True;
1157
1158         *res = NULL;
1159
1160         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1161                  "scope => [%d], pagesize => [%d]\n",
1162                  base, filter, scope, pagesize));
1163
1164         cookie_be = ber_alloc_t(LBER_USE_DER);
1165         if (cookie_be == NULL) {
1166                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1167                          "NULL\n"));
1168                 return LDAP_NO_MEMORY;
1169         }
1170
1171         /* construct cookie */
1172         if (*cookie != NULL) {
1173                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1174                 ber_bvfree(*cookie); /* don't need it from last time */
1175                 *cookie = NULL;
1176         } else {
1177                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1178         }
1179         ber_flatten(cookie_be, &cookie_bv);
1180
1181         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1182         pr.ldctl_iscritical = (char) critical;
1183         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1184         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1185
1186         controls[0] = &pr;
1187         controls[1] = NULL;
1188
1189         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1190                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1191
1192         ber_free(cookie_be, 1);
1193         ber_bvfree(cookie_bv);
1194
1195         if (rc != 0) {
1196                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1197                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1198                 goto done;
1199         }
1200
1201         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1202
1203         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1204                                NULL, NULL, &rcontrols,  0);
1205         if (rc != 0) {
1206                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1207                          "with [%s]\n", ldap_err2string(rc)));
1208                 goto done;
1209         }
1210
1211         if (rcontrols == NULL)
1212                 goto done;
1213
1214         for (i=0; rcontrols[i]; i++) {
1215
1216                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1217                         continue;
1218
1219                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1220                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1221                 /* the berval is the cookie, but must be freed when it is all
1222                    done */
1223                 if (cookie_bv->bv_len)
1224                         *cookie=ber_bvdup(cookie_bv);
1225                 else
1226                         *cookie=NULL;
1227                 ber_bvfree(cookie_bv);
1228                 ber_free(cookie_be, 1);
1229                 break;
1230         }
1231         ldap_controls_free(rcontrols);
1232 done:
1233         return rc;
1234 }
1235
1236 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1237 {
1238         int             rc = LDAP_SERVER_DOWN;
1239         int             attempts = 0;
1240         char           *utf8_dn;
1241         time_t          endtime = time(NULL)+lp_ldap_timeout();
1242
1243         SMB_ASSERT(ldap_state);
1244
1245         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1246
1247         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1248                 return LDAP_NO_MEMORY;
1249         }
1250
1251         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1252                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1253
1254         SAFE_FREE(utf8_dn);
1255         return rc;
1256 }
1257
1258 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1259 {
1260         int             rc = LDAP_SERVER_DOWN;
1261         int             attempts = 0;
1262         char           *utf8_dn;
1263         time_t          endtime = time(NULL)+lp_ldap_timeout();
1264
1265         SMB_ASSERT(ldap_state);
1266
1267         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1268
1269         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1270                 return LDAP_NO_MEMORY;
1271         }
1272
1273         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1274                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1275
1276         SAFE_FREE(utf8_dn);
1277         return rc;
1278 }
1279
1280 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1281 {
1282         int             rc = LDAP_SERVER_DOWN;
1283         int             attempts = 0;
1284         char           *utf8_dn;
1285         time_t          endtime = time(NULL)+lp_ldap_timeout();
1286
1287         SMB_ASSERT(ldap_state);
1288
1289         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1290
1291         if (push_utf8_allocate(&utf8_dn, dn) == (size_t)-1) {
1292                 return LDAP_NO_MEMORY;
1293         }
1294
1295         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1296                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1297
1298         SAFE_FREE(utf8_dn);
1299         return rc;
1300 }
1301
1302 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1303                                LDAP_CONST char *reqoid, struct berval *reqdata,
1304                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1305                                char **retoidp, struct berval **retdatap)
1306 {
1307         int             rc = LDAP_SERVER_DOWN;
1308         int             attempts = 0;
1309         time_t          endtime = time(NULL)+lp_ldap_timeout();
1310
1311         if (!ldap_state)
1312                 return (-1);
1313
1314         while (another_ldap_try(ldap_state, &rc, &attempts, endtime))
1315                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1316                                                reqdata, serverctrls,
1317                                                clientctrls, retoidp, retdatap);
1318         return rc;
1319 }
1320
1321 /*******************************************************************
1322  run the search by name.
1323 ******************************************************************/
1324 int smbldap_search_suffix (struct smbldap_state *ldap_state, const char *filter,
1325                            const char **search_attr, LDAPMessage ** result)
1326 {
1327         int scope = LDAP_SCOPE_SUBTREE;
1328         int rc;
1329
1330         rc = smbldap_search(ldap_state, lp_ldap_suffix(), scope, filter, search_attr, 0, result);
1331
1332         if (rc != LDAP_SUCCESS) {
1333                 char *ld_error = NULL;
1334                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
1335                                 &ld_error);
1336                 DEBUG(0,("smbldap_search_suffix: Problem during the LDAP search: %s (%s)\n",
1337                         ld_error?ld_error:"(unknown)", ldap_err2string (rc)));
1338                 SAFE_FREE(ld_error);
1339         }
1340
1341         return rc;
1342 }
1343
1344 static void smbldap_idle_fn(void **data, time_t *interval, time_t now)
1345 {
1346         struct smbldap_state *state = (struct smbldap_state *)(*data);
1347
1348         if (state->ldap_struct == NULL) {
1349                 DEBUG(10,("ldap connection not connected...\n"));
1350                 return;
1351         }
1352
1353         if ((state->last_use+SMBLDAP_IDLE_TIME) > now) {
1354                 DEBUG(10,("ldap connection not idle...\n"));
1355                 return;
1356         }
1357
1358         DEBUG(7,("ldap connection idle...closing connection\n"));
1359         smbldap_close(state);
1360 }
1361
1362 /**********************************************************************
1363  Housekeeping
1364  *********************************************************************/
1365
1366 void smbldap_free_struct(struct smbldap_state **ldap_state)
1367 {
1368         smbldap_close(*ldap_state);
1369
1370         if ((*ldap_state)->bind_secret) {
1371                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1372         }
1373
1374         SAFE_FREE((*ldap_state)->bind_dn);
1375         SAFE_FREE((*ldap_state)->bind_secret);
1376
1377         smb_unregister_idle_event((*ldap_state)->event_id);
1378
1379         *ldap_state = NULL;
1380
1381         /* No need to free any further, as it is talloc()ed */
1382 }
1383
1384
1385 /**********************************************************************
1386  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1387  *********************************************************************/
1388
1389 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, const char *location, struct smbldap_state **smbldap_state)
1390 {
1391         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1392         if (!*smbldap_state) {
1393                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1394                 return NT_STATUS_NO_MEMORY;
1395         }
1396
1397         if (location) {
1398                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1399         } else {
1400                 (*smbldap_state)->uri = "ldap://localhost";
1401         }
1402
1403         (*smbldap_state)->event_id =
1404                 smb_register_idle_event(smbldap_idle_fn, (void *)(*smbldap_state),
1405                                         SMBLDAP_IDLE_TIME);
1406
1407         if ((*smbldap_state)->event_id == SMB_EVENT_ID_INVALID) {
1408                 DEBUG(0,("Failed to register LDAP idle event!\n"));
1409                 return NT_STATUS_INVALID_HANDLE;
1410         }
1411
1412         return NT_STATUS_OK;
1413 }
1414
1415 /*******************************************************************
1416  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1417 ********************************************************************/
1418
1419 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1420 {
1421         char *utf8_dn, *unix_dn;
1422
1423         utf8_dn = ldap_get_dn(ld, entry);
1424         if (!utf8_dn) {
1425                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1426                 return NULL;
1427         }
1428         if (pull_utf8_allocate(&unix_dn, utf8_dn) == (size_t)-1) {
1429                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 [%s]\n", utf8_dn));
1430                 return NULL;
1431         }
1432         ldap_memfree(utf8_dn);
1433         return unix_dn;
1434 }
1435
1436 /*******************************************************************
1437  Check if root-dse has a certain Control or Extension
1438 ********************************************************************/
1439
1440 static BOOL smbldap_check_root_dse(struct smbldap_state *ldap_state, const char **attrs, const char *value)
1441 {
1442         LDAPMessage *msg = NULL;
1443         LDAPMessage *entry = NULL;
1444         char **values = NULL;
1445         int rc, num_result, num_values, i;
1446         BOOL result = False;
1447
1448         if (!attrs[0]) {
1449                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1450                 return False;
1451         }
1452
1453         if (!strequal(attrs[0], "supportedExtension") &&
1454             !strequal(attrs[0], "supportedControl") &&
1455             !strequal(attrs[0], "namingContexts")) {
1456                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1457                 return False;
1458         }
1459
1460         rc = ldap_search_s(ldap_state->ldap_struct, "", LDAP_SCOPE_BASE,
1461                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1462
1463         if (rc != LDAP_SUCCESS) {
1464                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1465                 return False;
1466         }
1467
1468         num_result = ldap_count_entries(ldap_state->ldap_struct, msg);
1469
1470         if (num_result != 1) {
1471                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1472                 goto done;
1473         }
1474
1475         entry = ldap_first_entry(ldap_state->ldap_struct, msg);
1476
1477         if (entry == NULL) {
1478                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1479                 goto done;
1480         }
1481
1482         values = ldap_get_values(ldap_state->ldap_struct, entry, attrs[0]);
1483
1484         if (values == NULL) {
1485                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1486                 goto done;
1487         }
1488
1489         num_values = ldap_count_values(values);
1490
1491         if (num_values == 0) {
1492                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1493                 goto done;
1494         }
1495
1496         for (i=0; i<num_values; i++) {
1497                 if (strcmp(values[i], value) == 0)
1498                         result = True;
1499         }
1500
1501
1502  done:
1503         if (values != NULL)
1504                 ldap_value_free(values);
1505         if (msg != NULL)
1506                 ldap_msgfree(msg);
1507
1508         return result;
1509
1510 }
1511
1512 /*******************************************************************
1513  Check if LDAP-Server supports a certain Control (OID in string format)
1514 ********************************************************************/
1515
1516 BOOL smbldap_has_control(struct smbldap_state *ldap_state, const char *control)
1517 {
1518         const char *attrs[] = { "supportedControl", NULL };
1519         return smbldap_check_root_dse(ldap_state, attrs, control);
1520 }
1521
1522 /*******************************************************************
1523  Check if LDAP-Server supports a certain Extension (OID in string format)
1524 ********************************************************************/
1525
1526 BOOL smbldap_has_extension(struct smbldap_state *ldap_state, const char *extension)
1527 {
1528         const char *attrs[] = { "supportedExtension", NULL };
1529         return smbldap_check_root_dse(ldap_state, attrs, extension);
1530 }
1531
1532 /*******************************************************************
1533  Check if LDAP-Server holds a given namingContext
1534 ********************************************************************/
1535
1536 BOOL smbldap_has_naming_context(struct smbldap_state *ldap_state, const char *naming_context)
1537 {
1538         const char *attrs[] = { "namingContexts", NULL };
1539         return smbldap_check_root_dse(ldap_state, attrs, naming_context);
1540 }