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/*
Unix SMB/CIFS implementation.
ID Mapping
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
/******************************************************************
* Get the free RID base if idmap is configured, otherwise return 0
******************************************************************/
uint32 idmap_get_free_rid_base(void)
{
uint32 low, high;
if (idmap_get_free_rid_range(&low, &high)) {
return low;
}
return 0;
}
BOOL idmap_check_ugid_is_in_free_range(uint32 id)
{
uint32 low, high;
if (!idmap_get_free_ugid_range(&low, &high)) {
return False;
}
if (id < low || id > high) {
return False;
}
return True;
}
BOOL idmap_check_rid_is_in_free_range(uint32 rid)
{
uint32 low, high;
if (!idmap_get_free_rid_range(&low, &high)) {
return False;
}
if (rid < low || rid > high) {
return False;
}
return True;
}
/******************************************************************
* Get the the non-algorithmic RID range if idmap range are defined
******************************************************************/
BOOL idmap_get_free_rid_range(uint32 *low, uint32 *high)
{
uint32 id_low, id_high;
if (lp_idmap_only()) {
*low = BASE_RID;
*high = (uint32)-1;
}
if (!idmap_get_free_ugid_range(&id_low, &id_high)) {
return False;
}
*low = fallback_pdb_uid_to_user_rid(id_low);
if (fallback_pdb_user_rid_to_uid((uint32)-1) < id_high) {
*high = (uint32)-1;
} else {
*high = fallback_pdb_uid_to_user_rid(id_high);
}
return True;
}
BOOL idmap_get_free_ugid_range(uint32 *low, uint32 *high)
{
uid_t u_low, u_high;
gid_t g_low, g_high;
if (!lp_idmap_uid(&u_low, &u_high) || !lp_idmap_gid(&g_low, &g_high)) {
return False;
}
if (u_low < g_low) {
*low = u_low;
} else {
*low = g_low;
}
if (u_high < g_high) {
*high = g_high;
} else {
*high = u_high;
}
return True;
}
/*****************************************************************
*THE CANONICAL* convert uid_t to SID function.
Tries winbind first - then uses local lookup.
Returns SID pointer.
*****************************************************************/
DOM_SID *uid_to_sid(DOM_SID *sid, uid_t uid)
{
unid_t id;
DEBUG(10,("uid_to_sid: uid = [%d]\n", uid));
if (idmap_check_ugid_is_in_free_range(uid)) {
id.uid = uid;
if (NT_STATUS_IS_ERR(idmap_get_sid_from_id(sid, id, ID_USERID))) {
DEBUG(10, ("uid_to_sid: Failed to map sid = [%s]\n", sid_string_static(sid)));
return NULL;
}
} else {
sid_copy(sid, get_global_sam_sid());
sid_append_rid(sid, fallback_pdb_uid_to_user_rid(uid));
DEBUG(10,("uid_to_sid: algorithmic %u -> %s\n", (unsigned int)uid, sid_string_static(sid)));
}
return sid;
}
/*****************************************************************
*THE CANONICAL* convert gid_t to SID function.
Tries winbind first - then uses local lookup.
Returns SID pointer.
*****************************************************************/
DOM_SID *gid_to_sid(DOM_SID *sid, gid_t gid)
{
GROUP_MAP map;
unid_t id;
DEBUG(10,("gid_to_sid: gid = [%d]\n", gid));
if (idmap_check_ugid_is_in_free_range(gid)) {
id.gid = gid;
if (NT_STATUS_IS_ERR(idmap_get_sid_from_id(sid, id, ID_GROUPID))) {
DEBUG(10, ("gid_to_sid: Failed to map sid = [%s]\n", sid_string_static(sid)));
return NULL;
}
} else {
if (pdb_getgrgid(&map, gid, MAPPING_WITHOUT_PRIV)) {
sid_copy(sid, &map.sid);
} else {
sid_copy(sid, get_global_sam_sid());
sid_append_rid(sid, pdb_gid_to_group_rid(gid));
}
DEBUG(10,("gid_to_sid: algorithmic %u -> %s\n", (unsigned int)gid, sid_string_static(sid)));
}
return sid;
}
/*****************************************************************
*THE CANONICAL* convert SID to uid function.
Tries winbind first - then uses local lookup.
Returns True if this name is a user sid and the conversion
was done correctly, False if not. sidtype is set by this function.
*****************************************************************/
BOOL sid_to_uid(const DOM_SID *sid, uid_t *uid)
{
uint32 rid;
unid_t id;
int type;
DEBUG(10,("sid_to_uid: sid = [%s]\n", sid_string_static(sid)));
if (sid_peek_check_rid(get_global_sam_sid(), sid, &rid)) {
if (!idmap_check_rid_is_in_free_range(rid)) {
if (!fallback_pdb_rid_is_user(rid)) {
DEBUG(3, ("sid_to_uid: RID %u is *NOT* a user\n", (unsigned)rid));
return False;
}
*uid = fallback_pdb_user_rid_to_uid(rid);
return True;
}
}
type = ID_USERID;
if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&id, &type, sid))) {
DEBUG(10,("sid_to_uid: uid = [%d]\n", id.uid));
*uid = id.uid;
return True;
}
return False;
}
/*****************************************************************
*THE CANONICAL* convert SID to gid function.
Tries winbind first - then uses local lookup.
Returns True if this name is a user sid and the conversion
was done correctly, False if not.
*****************************************************************/
BOOL sid_to_gid(const DOM_SID *sid, gid_t *gid)
{
uint32 rid;
unid_t id;
int type;
DEBUG(10,("sid_to_gid: sid = [%s]\n", sid_string_static(sid)));
if (sid_peek_check_rid(get_global_sam_sid(), sid, &rid)) {
GROUP_MAP map;
BOOL result;
if (pdb_getgrsid(&map, *sid, MAPPING_WITHOUT_PRIV)) {
/* the SID is in the mapping table but not mapped */
if (map.gid==(gid_t)-1)
return False;
*gid = map.gid;
return True;
} else {
if (!idmap_check_rid_is_in_free_range(rid)) {
if (fallback_pdb_rid_is_user(rid)) {
DEBUG(3, ("sid_to_gid: RID %u is *NOT* a group\n", (unsigned)rid));
return False;
}
*gid = pdb_group_rid_to_gid(rid);
return True;
}
}
}
type = ID_GROUPID;
if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&id, &type, sid))) {
DEBUG(10,("sid_to_gid: gid = [%d]\n", id.gid));
*gid = id.gid;
return True;
}
return False;
}
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