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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"
#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, DOM_SID *sid, uid_t uid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("uid = [%lu]\n", (unsigned long)uid));
if (idmap_cache_find_uid2sid(uid, sid, &expired)) {
DEBUG(10, ("idmap_cache_find_uid2sid found %d%s\n", 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) {
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;
}
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, DOM_SID *sid, gid_t gid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("gid = [%lu]\n", (unsigned long)gid));
if (idmap_cache_find_uid2sid(gid, sid, &expired)) {
DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n", 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) {
struct dom_sid null_sid;
ZERO_STRUCT(null_sid);
idmap_cache_set_sid2uid(&null_sid, gid);
DEBUG(10, ("gid [%lu] not mapped\n", (unsigned long)gid));
return NT_STATUS_NONE_MAPPED;
}
idmap_cache_set_sid2uid(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, DOM_SID *sid, uid_t *uid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("idmap_sid_to_uid: sid = [%s]\n", sid_string_dbg(sid)));
if (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) && (map.status == ID_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));
idmap_cache_set_sid2uid(sid, -1);
return NT_STATUS_NONE_MAPPED;
}
goto done;
}
if (dom_name[0] != '\0') {
/*
* We had the task to go to a specific domain which
* could not answer our request. Fail.
*/
idmap_cache_set_sid2uid(sid, -1);
return NT_STATUS_NONE_MAPPED;
}
ret = idmap_new_mapping(sid, ID_TYPE_UID, &map.xid);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(10, ("idmap_new_mapping failed: %s\n",
nt_errstr(ret)));
idmap_cache_set_sid2uid(sid, -1);
return ret;
}
done:
*uid = (uid_t)map.xid.id;
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, DOM_SID *sid, gid_t *gid)
{
NTSTATUS ret;
struct id_map map;
bool expired;
DEBUG(10,("idmap_sid_to_gid: sid = [%s]\n", sid_string_dbg(sid)));
if (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) && (map.status == ID_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));
idmap_cache_set_sid2gid(sid, -1);
return NT_STATUS_NONE_MAPPED;
}
goto done;
}
if (domname[0] != '\0') {
/*
* We had the task to go to a specific domain which
* could not answer our request. Fail.
*/
idmap_cache_set_sid2uid(sid, -1);
return NT_STATUS_NONE_MAPPED;
}
ret = idmap_new_mapping(sid, ID_TYPE_GID, &map.xid);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(10, ("idmap_new_mapping failed: %s\n",
nt_errstr(ret)));
idmap_cache_set_sid2gid(sid, -1);
return ret;
}
done:
*gid = map.xid.id;
idmap_cache_set_sid2gid(sid, *gid);
return NT_STATUS_OK;
}
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