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/*
Unix SMB/CIFS implementation.
ID Mapping
Copyright (C) Simo Sorce 2003
Copyright (C) Jeremy Allison 2006
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 3 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, see <http://www.gnu.org/licenses/>.*/
#include "includes.h"
#include "winbindd.h"
#include "winbindd_proto.h"
#include "idmap.h"
#include "idmap_cache.h"
#include "../libcli/security/security.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP
/*****************************************************************
Returns the SID mapped to the given UID.
If mapping is not possible returns an error.
*****************************************************************/
NTSTATUS idmap_uid_to_sid(const char *domname, struct dom_sid *sid, uid_t uid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("idmap_uid_to_sid: uid = [%lu], domain = '%s'\n",
(unsigned long)uid, domname?domname:"NULL"));
if (winbindd_use_idmap_cache()
&& idmap_cache_find_uid2sid(uid, sid, &expired)) {
DEBUG(10, ("idmap_cache_find_uid2sid found %u%s\n",
(unsigned int)uid,
expired ? " (expired)": ""));
if (expired && idmap_is_online()) {
DEBUG(10, ("revalidating expired entry\n"));
goto backend;
}
if (is_null_sid(sid)) {
DEBUG(10, ("Returning negative cache entry\n"));
return NT_STATUS_NONE_MAPPED;
}
DEBUG(10, ("Returning positive cache entry\n"));
return NT_STATUS_OK;
}
backend:
map.sid = sid;
map.xid.type = ID_TYPE_UID;
map.xid.id = uid;
ret = idmap_backends_unixid_to_sid(domname, &map);
if ( ! NT_STATUS_IS_OK(ret)) {
DEBUG(10, ("error mapping uid [%lu]\n", (unsigned long)uid));
return ret;
}
if (map.status != ID_MAPPED) {
if (winbindd_use_idmap_cache()) {
struct dom_sid null_sid;
ZERO_STRUCT(null_sid);
idmap_cache_set_sid2uid(&null_sid, uid);
}
DEBUG(10, ("uid [%lu] not mapped\n", (unsigned long)uid));
return NT_STATUS_NONE_MAPPED;
}
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2uid(sid, uid);
}
return NT_STATUS_OK;
}
/*****************************************************************
Returns SID mapped to the given GID.
If mapping is not possible returns an error.
*****************************************************************/
NTSTATUS idmap_gid_to_sid(const char *domname, struct dom_sid *sid, gid_t gid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("idmap_gid_to_sid: gid = [%lu], domain = '%s'\n",
(unsigned long)gid, domname?domname:"NULL"));
if (winbindd_use_idmap_cache()
&& idmap_cache_find_gid2sid(gid, sid, &expired)) {
DEBUG(10, ("idmap_cache_find_gid2sid found %u%s\n",
(unsigned int)gid,
expired ? " (expired)": ""));
if (expired && idmap_is_online()) {
DEBUG(10, ("revalidating expired entry\n"));
goto backend;
}
if (is_null_sid(sid)) {
DEBUG(10, ("Returning negative cache entry\n"));
return NT_STATUS_NONE_MAPPED;
}
DEBUG(10, ("Returning positive cache entry\n"));
return NT_STATUS_OK;
}
backend:
map.sid = sid;
map.xid.type = ID_TYPE_GID;
map.xid.id = gid;
ret = idmap_backends_unixid_to_sid(domname, &map);
if ( ! NT_STATUS_IS_OK(ret)) {
DEBUG(10, ("error mapping gid [%lu]\n", (unsigned long)gid));
return ret;
}
if (map.status != ID_MAPPED) {
if (winbindd_use_idmap_cache()) {
struct dom_sid null_sid;
ZERO_STRUCT(null_sid);
idmap_cache_set_sid2gid(&null_sid, gid);
}
DEBUG(10, ("gid [%lu] not mapped\n", (unsigned long)gid));
return NT_STATUS_NONE_MAPPED;
}
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2gid(sid, gid);
}
return NT_STATUS_OK;
}
/*****************************************************************
Returns the UID mapped to the given SID.
If mapping is not possible or SID maps to a GID returns an error.
*****************************************************************/
NTSTATUS idmap_sid_to_uid(const char *dom_name, struct dom_sid *sid, uid_t *uid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("idmap_sid_to_uid: sid = [%s], domain = '%s'\n",
sid_string_dbg(sid), dom_name));
if (winbindd_use_idmap_cache()
&& idmap_cache_find_sid2uid(sid, uid, &expired)) {
DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n",
(int)(*uid), expired ? " (expired)": ""));
if (expired && idmap_is_online()) {
DEBUG(10, ("revalidating expired entry\n"));
goto backend;
}
if ((*uid) == -1) {
DEBUG(10, ("Returning negative cache entry\n"));
return NT_STATUS_NONE_MAPPED;
}
DEBUG(10, ("Returning positive cache entry\n"));
return NT_STATUS_OK;
}
backend:
map.sid = sid;
map.xid.type = ID_TYPE_UID;
ret = idmap_backends_sid_to_unixid(dom_name, &map);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(10, ("idmap_backends_sid_to_unixid failed: %s\n",
nt_errstr(ret)));
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2uid(sid, -1);
}
return ret;
}
if (map.status != ID_MAPPED) {
DEBUG(10, ("sid [%s] is not mapped\n", sid_string_dbg(sid)));
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2uid(sid, -1);
}
return NT_STATUS_NONE_MAPPED;
}
if (map.xid.type != ID_TYPE_UID) {
DEBUG(10, ("sid [%s] not mapped to a uid "
"[%u,%u,%u]\n",
sid_string_dbg(sid),
map.status,
map.xid.type,
map.xid.id));
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2uid(sid, -1);
}
return NT_STATUS_NONE_MAPPED;
}
*uid = (uid_t)map.xid.id;
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2uid(sid, *uid);
}
return NT_STATUS_OK;
}
/*****************************************************************
Returns the GID mapped to the given SID.
If mapping is not possible or SID maps to a UID returns an error.
*****************************************************************/
NTSTATUS idmap_sid_to_gid(const char *domname, struct dom_sid *sid, gid_t *gid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("idmap_sid_to_gid: sid = [%s], domain = '%s'\n",
sid_string_dbg(sid), domname));
if (winbindd_use_idmap_cache()
&& idmap_cache_find_sid2gid(sid, gid, &expired)) {
DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
(int)(*gid), expired ? " (expired)": ""));
if (expired && idmap_is_online()) {
DEBUG(10, ("revalidating expired entry\n"));
goto backend;
}
if ((*gid) == -1) {
DEBUG(10, ("Returning negative cache entry\n"));
return NT_STATUS_NONE_MAPPED;
}
DEBUG(10, ("Returning positive cache entry\n"));
return NT_STATUS_OK;
}
backend:
map.sid = sid;
map.xid.type = ID_TYPE_GID;
ret = idmap_backends_sid_to_unixid(domname, &map);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(10, ("idmap_backends_sid_to_unixid failed: %s\n",
nt_errstr(ret)));
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2gid(sid, -1);
}
return ret;
}
if (map.status != ID_MAPPED) {
DEBUG(10, ("sid [%s] is not mapped\n", sid_string_dbg(sid)));
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2gid(sid, -1);
}
return NT_STATUS_NONE_MAPPED;
}
if (map.xid.type != ID_TYPE_GID) {
DEBUG(10, ("sid [%s] not mapped to a gid "
"[%u,%u,%u]\n",
sid_string_dbg(sid),
map.status,
map.xid.type,
map.xid.id));
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2gid(sid, -1);
}
return NT_STATUS_NONE_MAPPED;
}
*gid = map.xid.id;
if (winbindd_use_idmap_cache()) {
idmap_cache_set_sid2gid(sid, *gid);
}
return NT_STATUS_OK;
}
/**
* check whether a given unix id is inside the filter range of an idmap domain
*/
bool idmap_unix_id_is_in_range(uint32_t id, struct idmap_domain *dom)
{
if (id == 0) {
/* 0 is not an allowed unix id for id mapping */
return false;
}
if ((dom->low_id && (id < dom->low_id)) ||
(dom->high_id && (id > dom->high_id)))
{
return false;
}
return true;
}
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