source: branches/samba-3.2.x/source/winbindd/idmap_util.c

/* 
   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"

#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(DOM_SID *sid, uid_t uid)
{
        NTSTATUS ret;
        struct id_map map;
        struct id_map *maps[2];

        DEBUG(10,("uid = [%lu]\n", (unsigned long)uid));

        map.sid = sid;
        map.xid.type = ID_TYPE_UID;
        map.xid.id = uid;

        maps[0] = &map;
        maps[1] = NULL;
        
        ret = idmap_unixids_to_sids(maps);
        if ( ! NT_STATUS_IS_OK(ret)) {
                DEBUG(10, ("error mapping uid [%lu]\n", (unsigned long)uid));
                return ret;
        }

        if (map.status != ID_MAPPED) {
                DEBUG(10, ("uid [%lu] not mapped\n", (unsigned long)uid));
                return NT_STATUS_NONE_MAPPED;
        }

        return NT_STATUS_OK;
}

/*****************************************************************
 Returns SID mapped to the given GID.
 If mapping is not possible returns an error.
*****************************************************************/  

NTSTATUS idmap_gid_to_sid(DOM_SID *sid, gid_t gid)
{
        NTSTATUS ret;
        struct id_map map;
        struct id_map *maps[2];

        DEBUG(10,("gid = [%lu]\n", (unsigned long)gid));

        map.sid = sid;
        map.xid.type = ID_TYPE_GID;
        map.xid.id = gid;

        maps[0] = &map;
        maps[1] = NULL;
        
        ret = idmap_unixids_to_sids(maps);
        if ( ! NT_STATUS_IS_OK(ret)) {
                DEBUG(10, ("error mapping gid [%lu]\n", (unsigned long)gid));
                return ret;
        }

        if (map.status != ID_MAPPED) {
                DEBUG(10, ("gid [%lu] not mapped\n", (unsigned long)gid));
                return NT_STATUS_NONE_MAPPED;
        }

        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(DOM_SID *sid, uid_t *uid)
{
        NTSTATUS ret;
        struct id_map map;
        struct id_map *maps[2];

        DEBUG(10,("idmap_sid_to_uid: sid = [%s]\n", sid_string_dbg(sid)));

        map.sid = sid;
        map.xid.type = ID_TYPE_UID;     
        
        maps[0] = &map;
        maps[1] = NULL;
        
        ret = idmap_sids_to_unixids(maps);
        if ( ! NT_STATUS_IS_OK(ret)) {
                DEBUG(10, ("error mapping sid [%s] to uid\n", 
                           sid_string_dbg(sid)));
                return ret;
        }

        if ((map.status != ID_MAPPED) || (map.xid.type != ID_TYPE_UID)) {
                DEBUG(10, ("sid [%s] not mapped to an uid [%u,%u,%u]\n", 
                           sid_string_dbg(sid),
                           map.status, 
                           map.xid.type, 
                           map.xid.id));
                return NT_STATUS_NONE_MAPPED;
        }

        *uid = map.xid.id;

        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(DOM_SID *sid, gid_t *gid)
{
        NTSTATUS ret;
        struct id_map map;
        struct id_map *maps[2];

        DEBUG(10,("idmap_sid_to_gid: sid = [%s]\n", sid_string_dbg(sid)));

        map.sid = sid;
        map.xid.type = ID_TYPE_GID;
        
        maps[0] = &map;
        maps[1] = NULL;
        
        ret = idmap_sids_to_unixids(maps);
        if ( ! NT_STATUS_IS_OK(ret)) {
                DEBUG(10, ("error mapping sid [%s] to gid\n", 
                           sid_string_dbg(sid)));
                return ret;
        }

        if ((map.status != ID_MAPPED) || (map.xid.type != ID_TYPE_GID)) {
                DEBUG(10, ("sid [%s] not mapped to a gid [%u,%u]\n", 
                           sid_string_dbg(sid),
                           map.status, 
                           map.xid.type));
                return NT_STATUS_NONE_MAPPED;
        }

        *gid = map.xid.id;

        return NT_STATUS_OK;
}