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/*
Unix SMB/CIFS implementation.
Winbind ID Mapping
Copyright (C) Tim Potter 2000
Copyright (C) Anthony Liguori <aliguor@us.ibm.com> 2003
Copyright (C) Simo Sorce 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.*/
#include "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP
static struct {
const char *name;
/* Function to create a member of the idmap_methods list */
NTSTATUS (*reg_meth)(struct idmap_methods **methods);
struct idmap_methods *methods;
} remote_idmap_functions[] = {
{ NULL, NULL, NULL }
};
static struct idmap_methods *local_map;
static struct idmap_methods *remote_map;
static struct idmap_methods *get_methods(const char *name)
{
int i = 0;
struct idmap_methods *ret = NULL;
while (remote_idmap_functions[i].name && strcmp(remote_idmap_functions[i].name, name)) {
i++;
}
if (remote_idmap_functions[i].name) {
if (!remote_idmap_functions[i].methods) {
remote_idmap_functions[i].reg_meth(&remote_idmap_functions[i].methods);
}
ret = remote_idmap_functions[i].methods;
}
return ret;
}
/* Initialize backend */
BOOL idmap_init(void)
{
const char *remote_backend = lp_idmap_backend();
if (!local_map) {
idmap_reg_tdb(&local_map);
if (NT_STATUS_IS_ERR(local_map->init())) {
DEBUG(0, ("idmap_init: could not load or create local backend!\n"));
return False;
}
}
if (!remote_map && remote_backend && *remote_backend != 0) {
DEBUG(3, ("idmap_init: using '%s' as remote backend\n", remote_backend));
remote_map = get_methods(remote_backend);
if (!remote_map) {
DEBUG(0, ("idmap_init: could not load remote backend '%s'\n", remote_backend));
return False;
}
remote_map->init();
}
return True;
}
NTSTATUS idmap_set_mapping(const DOM_SID *sid, unid_t id, int id_type)
{
NTSTATUS ret;
if (!lp_idmap_only()) {
if (id_type & ID_USERID) {
uid_t low, high;
if (!lp_idmap_uid(&low, &high)) {
DEBUG(0, ("idmap uid range missing or invalid\n"));
DEBUGADD(0, ("idmap will be unable to map SIDs\n"));
return NT_STATUS_UNSUCCESSFUL;
}
if (low > id.uid || high < id.uid) {
DEBUG(0, ("uid not in range and idmap only is flase - not storing the mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
} else if (id_type & ID_GROUPID) {
gid_t low, high;
if (!lp_idmap_gid(&low, &high)) {
DEBUG(0, ("idmap gid range missing or invalid\n"));
DEBUGADD(0, ("idmap will be unable to map SIDs\n"));
return NT_STATUS_UNSUCCESSFUL;
}
if (low > id.gid || high < id.gid) {
DEBUG(0, ("uid not in range and idmap only is flase - not storing the mapping\n"));
return NT_STATUS_UNSUCCESSFUL;
}
} else {
DEBUG(0, ("Wrong ID Type, mapping failed!"));
return NT_STATUS_UNSUCCESSFUL;
}
}
ret = local_map->set_mapping(sid, id, id_type);
if (NT_STATUS_IS_ERR(ret)) {
DEBUG (0, ("idmap_set_mapping: Error, unable to modify local cache!\n"));
DEBUGADD(0, ("Error: %s", nt_errstr(ret)));
return ret;
}
/* Being able to update the remote cache is seldomly right.
Generally this is a forbidden operation. */
if (!(id_type & ID_CACHE) && (remote_map != NULL)) {
remote_map->set_mapping(sid, id, id_type);
if (NT_STATUS_IS_ERR(ret)) {
DEBUG (0, ("idmap_set_mapping: Error, unable to modify remote cache!\n"));
DEBUGADD(0, ("Error: %s", nt_errstr(ret)));
}
}
return ret;
}
/* Get ID from SID */
NTSTATUS idmap_get_id_from_sid(unid_t *id, int *id_type, const DOM_SID *sid)
{
NTSTATUS ret;
int loc_type;
loc_type = *id_type;
if (remote_map) { /* We have a central remote idmap */
loc_type |= ID_NOMAP;
}
ret = local_map->get_id_from_sid(id, &loc_type, sid);
if (NT_STATUS_IS_ERR(ret)) {
if (remote_map) {
ret = remote_map->get_id_from_sid(id, id_type, sid);
if (NT_STATUS_IS_ERR(ret)) {
DEBUG(3, ("idmap_get_id_from_sid: error fetching id!\n"));
return ret;
} else {
loc_type |= ID_CACHE;
idmap_set_mapping(sid, *id, loc_type);
}
}
} else {
*id_type = loc_type & ID_TYPEMASK;
}
return ret;
}
/* Get SID from ID */
NTSTATUS idmap_get_sid_from_id(DOM_SID *sid, unid_t id, int id_type)
{
NTSTATUS ret;
int loc_type;
loc_type = id_type;
if (remote_map) {
loc_type = id_type | ID_NOMAP;
}
ret = local_map->get_sid_from_id(sid, id, loc_type);
if (NT_STATUS_IS_ERR(ret)) {
if (remote_map) {
ret = remote_map->get_sid_from_id(sid, id, id_type);
if (NT_STATUS_IS_ERR(ret)) {
DEBUG(3, ("idmap_get_sid_from_id: unable to fetch sid!\n"));
return ret;
} else {
loc_type |= ID_CACHE;
idmap_set_mapping(sid, id, loc_type);
}
}
}
return ret;
}
/* Close backend */
NTSTATUS idmap_close(void)
{
NTSTATUS ret;
ret = local_map->close();
if (NT_STATUS_IS_ERR(ret)) {
DEBUG(3, ("idmap_close: failed to close local cache!\n"));
}
if (remote_map) {
ret = remote_map->close();
if (NT_STATUS_IS_ERR(ret)) {
DEBUG(3, ("idmap_close: failed to close remote idmap repository!\n"));
}
}
return ret;
}
/* Dump backend status */
void idmap_status(void)
{
local_map->status();
if (remote_map) remote_map->status();
}
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