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c844f65779
This will eventually allow the struct unixid to be passed all the way up and down the stack. Andrew Bartlett Signed-off-by: Michael Adam <obnox@samba.org>
323 lines
8.4 KiB
C
323 lines
8.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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ID Mapping
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Copyright (C) Simo Sorce 2003
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Copyright (C) Jeremy Allison 2006
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Copyright (C) Michael Adam 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.*/
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#include "includes.h"
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#include "winbindd.h"
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#include "winbindd_proto.h"
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#include "idmap.h"
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#include "idmap_cache.h"
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#include "../libcli/security/security.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_IDMAP
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/*****************************************************************
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Returns the SID mapped to the given UID.
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If mapping is not possible returns an error.
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*****************************************************************/
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NTSTATUS idmap_uid_to_sid(const char *domname, struct dom_sid *sid, uid_t uid)
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{
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NTSTATUS ret;
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struct id_map map;
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bool expired;
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DEBUG(10,("idmap_uid_to_sid: uid = [%lu], domain = '%s'\n",
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(unsigned long)uid, domname?domname:"NULL"));
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if (winbindd_use_idmap_cache()
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&& idmap_cache_find_uid2sid(uid, sid, &expired)) {
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DEBUG(10, ("idmap_cache_find_uid2sid found %u%s\n",
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(unsigned int)uid,
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expired ? " (expired)": ""));
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if (expired && idmap_is_online()) {
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DEBUG(10, ("revalidating expired entry\n"));
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goto backend;
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}
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if (is_null_sid(sid)) {
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DEBUG(10, ("Returning negative cache entry\n"));
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return NT_STATUS_NONE_MAPPED;
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}
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DEBUG(10, ("Returning positive cache entry\n"));
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return NT_STATUS_OK;
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}
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backend:
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ZERO_STRUCT(map);
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map.sid = sid;
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map.xid.type = ID_TYPE_UID;
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map.xid.id = uid;
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ret = idmap_backends_unixid_to_sid(domname, &map);
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if ( ! NT_STATUS_IS_OK(ret)) {
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DEBUG(10, ("error mapping uid [%lu]\n", (unsigned long)uid));
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return ret;
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}
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if (map.status != ID_MAPPED) {
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if (winbindd_use_idmap_cache()) {
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struct dom_sid null_sid;
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struct unixid id;
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id.type = ID_TYPE_UID;
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id.id = uid;
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ZERO_STRUCT(null_sid);
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idmap_cache_set_sid2unixid(&null_sid, &id);
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}
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DEBUG(10, ("uid [%lu] not mapped\n", (unsigned long)uid));
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return NT_STATUS_NONE_MAPPED;
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}
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2unixid(sid, &map.xid);
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}
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return NT_STATUS_OK;
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}
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/*****************************************************************
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Returns SID mapped to the given GID.
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If mapping is not possible returns an error.
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*****************************************************************/
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NTSTATUS idmap_gid_to_sid(const char *domname, struct dom_sid *sid, gid_t gid)
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{
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NTSTATUS ret;
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struct id_map map;
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bool expired;
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DEBUG(10,("idmap_gid_to_sid: gid = [%lu], domain = '%s'\n",
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(unsigned long)gid, domname?domname:"NULL"));
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if (winbindd_use_idmap_cache()
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&& idmap_cache_find_gid2sid(gid, sid, &expired)) {
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DEBUG(10, ("idmap_cache_find_gid2sid found %u%s\n",
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(unsigned int)gid,
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expired ? " (expired)": ""));
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if (expired && idmap_is_online()) {
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DEBUG(10, ("revalidating expired entry\n"));
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goto backend;
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}
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if (is_null_sid(sid)) {
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DEBUG(10, ("Returning negative cache entry\n"));
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return NT_STATUS_NONE_MAPPED;
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}
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DEBUG(10, ("Returning positive cache entry\n"));
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return NT_STATUS_OK;
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}
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backend:
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ZERO_STRUCT(map);
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map.sid = sid;
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map.xid.type = ID_TYPE_GID;
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map.xid.id = gid;
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ret = idmap_backends_unixid_to_sid(domname, &map);
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if ( ! NT_STATUS_IS_OK(ret)) {
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DEBUG(10, ("error mapping gid [%lu]\n", (unsigned long)gid));
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return ret;
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}
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if (map.status != ID_MAPPED) {
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if (winbindd_use_idmap_cache()) {
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struct dom_sid null_sid;
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struct unixid id;
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id.type = ID_TYPE_GID;
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id.id = gid;
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ZERO_STRUCT(null_sid);
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idmap_cache_set_sid2unixid(&null_sid, &id);
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}
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DEBUG(10, ("gid [%lu] not mapped\n", (unsigned long)gid));
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return NT_STATUS_NONE_MAPPED;
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}
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2unixid(sid, &map.xid);
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}
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return NT_STATUS_OK;
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}
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/*****************************************************************
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Returns the UID mapped to the given SID.
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If mapping is not possible or SID maps to a GID returns an error.
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*****************************************************************/
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NTSTATUS idmap_sid_to_uid(const char *dom_name, struct dom_sid *sid, uid_t *uid)
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{
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NTSTATUS ret;
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struct id_map map;
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bool expired;
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DEBUG(10,("idmap_sid_to_uid: sid = [%s], domain = '%s'\n",
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sid_string_dbg(sid), dom_name));
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if (winbindd_use_idmap_cache()
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&& idmap_cache_find_sid2uid(sid, uid, &expired)) {
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DEBUG(10, ("idmap_cache_find_sid2uid found %d%s\n",
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(int)(*uid), expired ? " (expired)": ""));
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if (expired && idmap_is_online()) {
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DEBUG(10, ("revalidating expired entry\n"));
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goto backend;
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}
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if ((*uid) == -1) {
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DEBUG(10, ("Returning negative cache entry\n"));
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return NT_STATUS_NONE_MAPPED;
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}
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DEBUG(10, ("Returning positive cache entry\n"));
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return NT_STATUS_OK;
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}
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backend:
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ZERO_STRUCT(map);
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map.sid = sid;
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map.xid.type = ID_TYPE_UID;
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ret = idmap_backends_sid_to_unixid(dom_name, &map);
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if (!NT_STATUS_IS_OK(ret)) {
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DEBUG(10, ("idmap_backends_sid_to_unixid failed: %s\n",
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nt_errstr(ret)));
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2uid(sid, -1);
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}
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return ret;
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}
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if (map.status != ID_MAPPED) {
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DEBUG(10, ("sid [%s] is not mapped\n", sid_string_dbg(sid)));
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2uid(sid, -1);
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}
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return NT_STATUS_NONE_MAPPED;
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}
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if (map.xid.type != ID_TYPE_UID) {
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DEBUG(10, ("sid [%s] not mapped to a uid "
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"[%u,%u,%u]\n",
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sid_string_dbg(sid),
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map.status,
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map.xid.type,
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map.xid.id));
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2uid(sid, -1);
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}
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return NT_STATUS_NONE_MAPPED;
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}
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*uid = (uid_t)map.xid.id;
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2unixid(sid, &map.xid);
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}
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return NT_STATUS_OK;
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}
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/*****************************************************************
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Returns the GID mapped to the given SID.
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If mapping is not possible or SID maps to a UID returns an error.
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*****************************************************************/
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NTSTATUS idmap_sid_to_gid(const char *domname, struct dom_sid *sid, gid_t *gid)
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{
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NTSTATUS ret;
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struct id_map map;
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bool expired;
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DEBUG(10,("idmap_sid_to_gid: sid = [%s], domain = '%s'\n",
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sid_string_dbg(sid), domname));
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if (winbindd_use_idmap_cache()
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&& idmap_cache_find_sid2gid(sid, gid, &expired)) {
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DEBUG(10, ("idmap_cache_find_sid2gid found %d%s\n",
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(int)(*gid), expired ? " (expired)": ""));
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if (expired && idmap_is_online()) {
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DEBUG(10, ("revalidating expired entry\n"));
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goto backend;
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}
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if ((*gid) == -1) {
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DEBUG(10, ("Returning negative cache entry\n"));
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return NT_STATUS_NONE_MAPPED;
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}
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DEBUG(10, ("Returning positive cache entry\n"));
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return NT_STATUS_OK;
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}
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backend:
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ZERO_STRUCT(map);
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map.sid = sid;
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map.xid.type = ID_TYPE_GID;
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ret = idmap_backends_sid_to_unixid(domname, &map);
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if (!NT_STATUS_IS_OK(ret)) {
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DEBUG(10, ("idmap_backends_sid_to_unixid failed: %s\n",
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nt_errstr(ret)));
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2gid(sid, -1);
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}
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return ret;
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}
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if (map.status != ID_MAPPED) {
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DEBUG(10, ("sid [%s] is not mapped\n", sid_string_dbg(sid)));
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2gid(sid, -1);
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}
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return NT_STATUS_NONE_MAPPED;
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}
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if (map.xid.type != ID_TYPE_GID) {
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DEBUG(10, ("sid [%s] not mapped to a gid "
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"[%u,%u,%u]\n",
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sid_string_dbg(sid),
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map.status,
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map.xid.type,
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map.xid.id));
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2gid(sid, -1);
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}
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return NT_STATUS_NONE_MAPPED;
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}
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*gid = map.xid.id;
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if (winbindd_use_idmap_cache()) {
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idmap_cache_set_sid2unixid(sid, &map.xid);
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}
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return NT_STATUS_OK;
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}
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/**
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* check whether a given unix id is inside the filter range of an idmap domain
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*/
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bool idmap_unix_id_is_in_range(uint32_t id, struct idmap_domain *dom)
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{
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if (id == 0) {
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/* 0 is not an allowed unix id for id mapping */
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return false;
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}
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if ((dom->low_id && (id < dom->low_id)) ||
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(dom->high_id && (id > dom->high_id)))
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{
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return false;
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}
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return true;
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}
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