mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
f168fac54c
Michael
(This used to be commit d14de0692c
)
703 lines
17 KiB
C
703 lines
17 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* RPC Pipe client / server routines
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* Copyright (C) Andrew Tridgell 1992-2006,
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* Copyright (C) Jean François Micouleau 1998-2001.
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* Copyright (C) Volker Lendecke 2006.
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* Copyright (C) Gerald Carter 2006.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "groupdb/mapping.h"
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static TDB_CONTEXT *tdb; /* used for driver files */
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static bool enum_group_mapping(const DOM_SID *domsid, enum lsa_SidType sid_name_use, GROUP_MAP **pp_rmap,
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size_t *p_num_entries, bool unix_only);
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static bool group_map_remove(const DOM_SID *sid);
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/****************************************************************************
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Open the group mapping tdb.
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****************************************************************************/
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static bool init_group_mapping(void)
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{
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const char *vstring = "INFO/version";
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int32 vers_id;
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GROUP_MAP *map_table = NULL;
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size_t num_entries = 0;
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if (tdb)
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return True;
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tdb = tdb_open_log(state_path("group_mapping.tdb"), 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
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if (!tdb) {
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DEBUG(0,("Failed to open group mapping database\n"));
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return False;
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}
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/* handle a Samba upgrade */
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tdb_lock_bystring(tdb, vstring);
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/* Cope with byte-reversed older versions of the db. */
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vers_id = tdb_fetch_int32(tdb, vstring);
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if ((vers_id == DATABASE_VERSION_V1) || (IREV(vers_id) == DATABASE_VERSION_V1)) {
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/* Written on a bigendian machine with old fetch_int code. Save as le. */
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tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
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vers_id = DATABASE_VERSION_V2;
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}
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/* if its an unknown version we remove everthing in the db */
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if (vers_id != DATABASE_VERSION_V2) {
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tdb_traverse(tdb, tdb_traverse_delete_fn, NULL);
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tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
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}
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tdb_unlock_bystring(tdb, vstring);
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/* cleanup any map entries with a gid == -1 */
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if ( enum_group_mapping( NULL, SID_NAME_UNKNOWN, &map_table, &num_entries, False ) ) {
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int i;
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for ( i=0; i<num_entries; i++ ) {
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if ( map_table[i].gid == -1 ) {
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group_map_remove( &map_table[i].sid );
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}
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}
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SAFE_FREE( map_table );
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}
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return True;
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}
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/****************************************************************************
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****************************************************************************/
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static bool add_mapping_entry(GROUP_MAP *map, int flag)
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{
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TDB_DATA dbuf;
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char *key = NULL;
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char *buf = NULL;
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fstring string_sid="";
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int len;
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bool ret;
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sid_to_fstring(string_sid, &map->sid);
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len = tdb_pack(NULL, sizeof(buf), "ddff",
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map->gid, map->sid_name_use, map->nt_name, map->comment);
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if (len) {
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buf = SMB_MALLOC_ARRAY(char, len);
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if (!buf) {
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return false;
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}
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len = tdb_pack((uint8 *)buf, sizeof(buf), "ddff", map->gid,
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map->sid_name_use, map->nt_name, map->comment);
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}
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if (asprintf(&key, "%s%s", GROUP_PREFIX, string_sid) < 0) {
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SAFE_FREE(buf);
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return false;
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}
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dbuf.dsize = len;
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dbuf.dptr = (uint8 *)buf;
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ret = (tdb_store_bystring(tdb, key, dbuf, flag) == 0);
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SAFE_FREE(key);
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SAFE_FREE(buf);
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return ret;
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}
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/****************************************************************************
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Return the sid and the type of the unix group.
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****************************************************************************/
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static bool get_group_map_from_sid(DOM_SID sid, GROUP_MAP *map)
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{
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TDB_DATA dbuf;
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char *key = NULL;
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fstring string_sid;
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int ret = 0;
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/* the key is the SID, retrieving is direct */
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sid_to_fstring(string_sid, &sid);
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if (asprintf(&key, "%s%s", GROUP_PREFIX, string_sid) < 0) {
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return false;
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}
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dbuf = tdb_fetch_bystring(tdb, key);
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if (!dbuf.dptr) {
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SAFE_FREE(key);
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return false;
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}
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SAFE_FREE(key);
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ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
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&map->gid, &map->sid_name_use,
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&map->nt_name, &map->comment);
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SAFE_FREE(dbuf.dptr);
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if ( ret == -1 ) {
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DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n"));
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return False;
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}
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sid_copy(&map->sid, &sid);
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return True;
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}
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/****************************************************************************
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Return the sid and the type of the unix group.
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****************************************************************************/
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static bool get_group_map_from_gid(gid_t gid, GROUP_MAP *map)
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{
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TDB_DATA kbuf, dbuf, newkey;
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fstring string_sid;
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int ret;
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/* we need to enumerate the TDB to find the GID */
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for (kbuf = tdb_firstkey(tdb);
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kbuf.dptr;
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newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
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if (strncmp((const char *)kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
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dbuf = tdb_fetch(tdb, kbuf);
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if (!dbuf.dptr)
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continue;
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fstrcpy(string_sid, (const char *)kbuf.dptr+strlen(GROUP_PREFIX));
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string_to_sid(&map->sid, string_sid);
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ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
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&map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
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SAFE_FREE(dbuf.dptr);
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if ( ret == -1 ) {
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DEBUG(3,("get_group_map_from_gid: tdb_unpack failure\n"));
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return False;
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}
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if (gid==map->gid) {
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SAFE_FREE(kbuf.dptr);
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return True;
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}
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}
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return False;
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}
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/****************************************************************************
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Return the sid and the type of the unix group.
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****************************************************************************/
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static bool get_group_map_from_ntname(const char *name, GROUP_MAP *map)
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{
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TDB_DATA kbuf, dbuf, newkey;
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fstring string_sid;
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int ret;
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/* we need to enumerate the TDB to find the name */
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for (kbuf = tdb_firstkey(tdb);
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kbuf.dptr;
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newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
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if (strncmp((const char *)kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
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dbuf = tdb_fetch(tdb, kbuf);
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if (!dbuf.dptr)
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continue;
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fstrcpy(string_sid, (const char *)kbuf.dptr+strlen(GROUP_PREFIX));
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string_to_sid(&map->sid, string_sid);
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ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
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&map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
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SAFE_FREE(dbuf.dptr);
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if ( ret == -1 ) {
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DEBUG(3,("get_group_map_from_ntname: tdb_unpack failure\n"));
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return False;
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}
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if ( strequal(name, map->nt_name) ) {
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SAFE_FREE(kbuf.dptr);
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return True;
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}
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}
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return False;
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}
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/****************************************************************************
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Remove a group mapping entry.
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****************************************************************************/
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static bool group_map_remove(const DOM_SID *sid)
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{
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TDB_DATA dbuf;
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char *key = NULL;
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fstring string_sid;
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bool ret;
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/* the key is the SID, retrieving is direct */
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sid_to_fstring(string_sid, sid);
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if (asprintf(&key, "%s%s", GROUP_PREFIX, string_sid) < 0) {
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return false;
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}
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dbuf = tdb_fetch_bystring(tdb, key);
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if (!dbuf.dptr) {
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SAFE_FREE(key);
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return false;
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}
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SAFE_FREE(dbuf.dptr);
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ret = (tdb_delete_bystring(tdb, key) == TDB_SUCCESS);
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SAFE_FREE(key);
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return ret;
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}
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/****************************************************************************
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Enumerate the group mapping.
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****************************************************************************/
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static bool enum_group_mapping(const DOM_SID *domsid, enum lsa_SidType sid_name_use, GROUP_MAP **pp_rmap,
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size_t *p_num_entries, bool unix_only)
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{
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TDB_DATA kbuf, dbuf, newkey;
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fstring string_sid;
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GROUP_MAP map;
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GROUP_MAP *mapt;
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int ret;
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size_t entries=0;
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DOM_SID grpsid;
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uint32 rid;
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*p_num_entries=0;
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*pp_rmap=NULL;
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for (kbuf = tdb_firstkey(tdb);
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kbuf.dptr;
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newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
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if (strncmp((const char *)kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0)
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continue;
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dbuf = tdb_fetch(tdb, kbuf);
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if (!dbuf.dptr)
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continue;
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fstrcpy(string_sid, (const char *)kbuf.dptr+strlen(GROUP_PREFIX));
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ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
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&map.gid, &map.sid_name_use, &map.nt_name, &map.comment);
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SAFE_FREE(dbuf.dptr);
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if ( ret == -1 ) {
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DEBUG(3,("enum_group_mapping: tdb_unpack failure\n"));
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continue;
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}
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/* list only the type or everything if UNKNOWN */
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if (sid_name_use!=SID_NAME_UNKNOWN && sid_name_use!=map.sid_name_use) {
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DEBUG(11,("enum_group_mapping: group %s is not of the requested type\n", map.nt_name));
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continue;
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}
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if (unix_only==ENUM_ONLY_MAPPED && map.gid==-1) {
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DEBUG(11,("enum_group_mapping: group %s is non mapped\n", map.nt_name));
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continue;
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}
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string_to_sid(&grpsid, string_sid);
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sid_copy( &map.sid, &grpsid );
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sid_split_rid( &grpsid, &rid );
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/* Only check the domain if we were given one */
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if ( domsid && !sid_equal( domsid, &grpsid ) ) {
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DEBUG(11,("enum_group_mapping: group %s is not in "
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"domain %s\n", string_sid,
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sid_string_dbg(domsid)));
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continue;
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}
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DEBUG(11,("enum_group_mapping: returning group %s of "
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"type %s\n", map.nt_name,
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sid_type_lookup(map.sid_name_use)));
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(*pp_rmap) = SMB_REALLOC_ARRAY((*pp_rmap), GROUP_MAP, entries+1);
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if (!(*pp_rmap)) {
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DEBUG(0,("enum_group_mapping: Unable to enlarge group map!\n"));
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return False;
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}
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mapt = (*pp_rmap);
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mapt[entries].gid = map.gid;
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sid_copy( &mapt[entries].sid, &map.sid);
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mapt[entries].sid_name_use = map.sid_name_use;
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fstrcpy(mapt[entries].nt_name, map.nt_name);
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fstrcpy(mapt[entries].comment, map.comment);
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entries++;
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}
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*p_num_entries=entries;
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return True;
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}
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/* This operation happens on session setup, so it should better be fast. We
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* store a list of aliases a SID is member of hanging off MEMBEROF/SID. */
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static NTSTATUS one_alias_membership(const DOM_SID *member,
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DOM_SID **sids, size_t *num)
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{
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fstring tmp;
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fstring key;
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char *string_sid;
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TDB_DATA dbuf;
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const char *p;
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NTSTATUS status;
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TALLOC_CTX *frame;
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slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX,
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sid_to_fstring(tmp, member));
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dbuf = tdb_fetch_bystring(tdb, key);
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if (dbuf.dptr == NULL) {
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return NT_STATUS_OK;
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}
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p = (const char *)dbuf.dptr;
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frame = talloc_stackframe();
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while (next_token_talloc(frame, &p, &string_sid, " ")) {
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DOM_SID alias;
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if (!string_to_sid(&alias, string_sid))
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continue;
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if (!add_sid_to_array_unique(NULL, &alias, sids, num)) {
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status = NT_STATUS_NO_MEMORY;
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goto done;
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}
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}
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done:
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TALLOC_FREE(frame);
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SAFE_FREE(dbuf.dptr);
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return status;
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}
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static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members,
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DOM_SID **sids, size_t *num)
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{
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size_t i;
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*num = 0;
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*sids = NULL;
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for (i=0; i<num_members; i++) {
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NTSTATUS status = one_alias_membership(&members[i], sids, num);
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if (!NT_STATUS_IS_OK(status))
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return status;
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}
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return NT_STATUS_OK;
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}
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static bool is_aliasmem(const DOM_SID *alias, const DOM_SID *member)
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{
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DOM_SID *sids;
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size_t i, num;
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/* This feels the wrong way round, but the on-disk data structure
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* dictates it this way. */
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if (!NT_STATUS_IS_OK(alias_memberships(member, 1, &sids, &num)))
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return False;
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for (i=0; i<num; i++) {
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if (sid_compare(alias, &sids[i]) == 0) {
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TALLOC_FREE(sids);
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return True;
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}
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}
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TALLOC_FREE(sids);
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return False;
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}
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static NTSTATUS add_aliasmem(const DOM_SID *alias, const DOM_SID *member)
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{
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GROUP_MAP map;
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TDB_DATA dbuf;
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char *key = NULL;
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fstring string_sid;
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char *new_memberstring;
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int result;
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if (!get_group_map_from_sid(*alias, &map))
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return NT_STATUS_NO_SUCH_ALIAS;
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if ( (map.sid_name_use != SID_NAME_ALIAS) &&
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(map.sid_name_use != SID_NAME_WKN_GRP) )
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return NT_STATUS_NO_SUCH_ALIAS;
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if (is_aliasmem(alias, member))
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return NT_STATUS_MEMBER_IN_ALIAS;
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sid_to_fstring(string_sid, member);
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if (asprintf(&key, "%s%s", MEMBEROF_PREFIX, string_sid) < 0) {
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return NT_STATUS_NO_MEMORY;
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}
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dbuf = tdb_fetch_bystring(tdb, key);
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sid_to_fstring(string_sid, alias);
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if (dbuf.dptr != NULL) {
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asprintf(&new_memberstring, "%s %s", (char *)(dbuf.dptr),
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string_sid);
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} else {
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new_memberstring = SMB_STRDUP(string_sid);
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}
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if (new_memberstring == NULL) {
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SAFE_FREE(key);
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return NT_STATUS_NO_MEMORY;
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}
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SAFE_FREE(dbuf.dptr);
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dbuf = string_term_tdb_data(new_memberstring);
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result = tdb_store_bystring(tdb, key, dbuf, 0);
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SAFE_FREE(new_memberstring);
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SAFE_FREE(key);
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return (result == 0 ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED);
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}
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struct aliasmem_closure {
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const DOM_SID *alias;
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DOM_SID **sids;
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size_t *num;
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};
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static int collect_aliasmem(TDB_CONTEXT *tdb_ctx, TDB_DATA key, TDB_DATA data,
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void *state)
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{
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struct aliasmem_closure *closure = (struct aliasmem_closure *)state;
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const char *p;
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char *alias_string;
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TALLOC_CTX *frame;
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|
|
if (strncmp((const char *)key.dptr, MEMBEROF_PREFIX,
|
|
strlen(MEMBEROF_PREFIX)) != 0)
|
|
return 0;
|
|
|
|
p = (const char *)data.dptr;
|
|
|
|
frame = talloc_stackframe();
|
|
while (next_token_talloc(frame, &p, &alias_string, " ")) {
|
|
DOM_SID alias, member;
|
|
const char *member_string;
|
|
|
|
if (!string_to_sid(&alias, alias_string))
|
|
continue;
|
|
|
|
if (sid_compare(closure->alias, &alias) != 0)
|
|
continue;
|
|
|
|
/* Ok, we found the alias we're looking for in the membership
|
|
* list currently scanned. The key represents the alias
|
|
* member. Add that. */
|
|
|
|
member_string = strchr((const char *)key.dptr, '/');
|
|
|
|
/* Above we tested for MEMBEROF_PREFIX which includes the
|
|
* slash. */
|
|
|
|
SMB_ASSERT(member_string != NULL);
|
|
member_string += 1;
|
|
|
|
if (!string_to_sid(&member, member_string))
|
|
continue;
|
|
|
|
if (!add_sid_to_array(NULL, &member, closure->sids, closure->num)) {
|
|
/* talloc fail. */
|
|
break;
|
|
}
|
|
}
|
|
|
|
TALLOC_FREE(frame);
|
|
return 0;
|
|
}
|
|
|
|
static NTSTATUS enum_aliasmem(const DOM_SID *alias, DOM_SID **sids, size_t *num)
|
|
{
|
|
GROUP_MAP map;
|
|
struct aliasmem_closure closure;
|
|
|
|
if (!get_group_map_from_sid(*alias, &map))
|
|
return NT_STATUS_NO_SUCH_ALIAS;
|
|
|
|
if ( (map.sid_name_use != SID_NAME_ALIAS) &&
|
|
(map.sid_name_use != SID_NAME_WKN_GRP) )
|
|
return NT_STATUS_NO_SUCH_ALIAS;
|
|
|
|
*sids = NULL;
|
|
*num = 0;
|
|
|
|
closure.alias = alias;
|
|
closure.sids = sids;
|
|
closure.num = num;
|
|
|
|
tdb_traverse(tdb, collect_aliasmem, &closure);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
static NTSTATUS del_aliasmem(const DOM_SID *alias, const DOM_SID *member)
|
|
{
|
|
NTSTATUS result;
|
|
DOM_SID *sids;
|
|
size_t i, num;
|
|
bool found = False;
|
|
char *member_string;
|
|
TDB_DATA dbuf;
|
|
char *key = NULL;
|
|
fstring sid_string;
|
|
|
|
result = alias_memberships(member, 1, &sids, &num);
|
|
|
|
if (!NT_STATUS_IS_OK(result))
|
|
return result;
|
|
|
|
for (i=0; i<num; i++) {
|
|
if (sid_compare(&sids[i], alias) == 0) {
|
|
found = True;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
TALLOC_FREE(sids);
|
|
return NT_STATUS_MEMBER_NOT_IN_ALIAS;
|
|
}
|
|
|
|
if (i < num)
|
|
sids[i] = sids[num-1];
|
|
|
|
num -= 1;
|
|
|
|
sid_to_fstring(sid_string, member);
|
|
if (asprintf(&key, "%s%s", MEMBEROF_PREFIX, sid_string) < 0) {
|
|
TALLOC_FREE(sids);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
if (num == 0) {
|
|
NTSTATUS ret = (tdb_delete_bystring(tdb, key) == 0 ?
|
|
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL);
|
|
TALLOC_FREE(sids);
|
|
SAFE_FREE(key);
|
|
return ret;
|
|
}
|
|
|
|
member_string = SMB_STRDUP("");
|
|
|
|
if (member_string == NULL) {
|
|
TALLOC_FREE(sids);
|
|
SAFE_FREE(key);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
for (i=0; i<num; i++) {
|
|
char *s = member_string;
|
|
|
|
sid_to_fstring(sid_string, &sids[i]);
|
|
asprintf(&member_string, "%s %s", s, sid_string);
|
|
|
|
SAFE_FREE(s);
|
|
if (member_string == NULL) {
|
|
TALLOC_FREE(sids);
|
|
SAFE_FREE(key);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
}
|
|
|
|
dbuf = string_term_tdb_data(member_string);
|
|
|
|
result = tdb_store_bystring(tdb, key, dbuf, 0) == 0 ?
|
|
NT_STATUS_OK : NT_STATUS_ACCESS_DENIED;
|
|
|
|
TALLOC_FREE(sids);
|
|
SAFE_FREE(member_string);
|
|
SAFE_FREE(key);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static const struct mapping_backend tdb_backend = {
|
|
.add_mapping_entry = add_mapping_entry,
|
|
.get_group_map_from_sid = get_group_map_from_sid,
|
|
.get_group_map_from_gid = get_group_map_from_gid,
|
|
.get_group_map_from_ntname = get_group_map_from_ntname,
|
|
.group_map_remove = group_map_remove,
|
|
.enum_group_mapping = enum_group_mapping,
|
|
.one_alias_membership = one_alias_membership,
|
|
.add_aliasmem = add_aliasmem,
|
|
.del_aliasmem = del_aliasmem,
|
|
.enum_aliasmem = enum_aliasmem
|
|
};
|
|
|
|
/*
|
|
initialise the tdb mapping backend
|
|
*/
|
|
const struct mapping_backend *groupdb_tdb_init(void)
|
|
{
|
|
if (!init_group_mapping()) {
|
|
DEBUG(0,("Failed to initialise tdb mapping backend\n"));
|
|
return NULL;
|
|
}
|
|
|
|
return &tdb_backend;
|
|
}
|