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-rw-r--r--source3/sam/idmap_util.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/source3/sam/idmap_util.c b/source3/sam/idmap_util.c
new file mode 100644
index 0000000000..fd44938989
--- /dev/null
+++ b/source3/sam/idmap_util.c
@@ -0,0 +1,189 @@
+/*
+ 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
+
+/*****************************************************************
+ *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 *psid, uid_t uid)
+{
+ unid_t id;
+
+ DEBUG(10,("uid_to_sid: uid = [%d]\n", uid));
+
+ id.uid = uid;
+ if (NT_STATUS_IS_OK(idmap_get_sid_from_id(psid, id, ID_USERID))) {
+ DEBUG(10, ("uid_to_sid: sid = [%s]\n", sid_string_static(psid)));
+ return psid;
+ }
+
+ /* If mapping is not found in idmap try with traditional method,
+ then stores the result in idmap.
+ We may add a switch in future to allow smooth migrations to
+ idmap-only db ---Simo */
+
+ sid_copy(psid, get_global_sam_sid());
+ sid_append_rid(psid, fallback_pdb_uid_to_user_rid(uid));
+
+ DEBUG(10,("uid_to_sid: algorithmic %u -> %s\n", (unsigned int)uid, sid_string_static(psid)));
+
+ return psid;
+
+}
+
+/*****************************************************************
+ *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 *psid, gid_t gid)
+{
+ GROUP_MAP map;
+ unid_t id;
+
+ DEBUG(10,("gid_to_sid: gid = [%d]\n", gid));
+
+ id.gid = gid;
+ if (NT_STATUS_IS_OK(idmap_get_sid_from_id(psid, id, ID_GROUPID))) {
+ DEBUG(10, ("gid_to_sid: sid = [%s]\n", sid_string_static(psid)));
+ return psid;
+ }
+
+ /* If mapping is not found in idmap try with traditional method,
+ then stores the result in idmap.
+ We may add a switch in future to allow smooth migrations to
+ idmap-only db ---Simo */
+
+ if (pdb_getgrgid(&map, gid, MAPPING_WITHOUT_PRIV)) {
+ sid_copy(psid, &map.sid);
+ } else {
+ sid_copy(psid, get_global_sam_sid());
+ sid_append_rid(psid, pdb_gid_to_group_rid(gid));
+ }
+
+ DEBUG(10,("gid_to_sid: algorithmic %u -> %s\n", (unsigned int)gid, sid_string_static(psid)));
+
+ return psid;
+}
+
+/*****************************************************************
+ *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 *psid, uid_t *puid, enum SID_NAME_USE *sidtype)
+{
+ unid_t id;
+ int type;
+
+ DEBUG(10,("sid_to_uid: sid = [%s]\n", sid_string_static(psid)));
+
+ *sidtype = SID_NAME_USER;
+
+ type = ID_USERID;
+ if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&id, &type, psid))) {
+ DEBUG(10,("sid_to_uid: uid = [%d]\n", id.uid));
+ *puid = id.uid;
+ return True;
+ }
+
+ if (sid_compare_domain(get_global_sam_sid(), psid) == 0) {
+ BOOL result;
+ uint32 rid;
+
+ DEBUG(10,("sid_to_uid: sid is local [%s]\n", sid_string_static(get_global_sam_sid())));
+
+ if (!sid_peek_rid(psid, &rid)) {
+ DEBUG(0, ("sid_to_uid: Error extracting RID from SID\n!"));
+ return False;
+ }
+ if (!pdb_rid_is_user(rid)) {
+ DEBUG(3, ("sid_to_uid: RID %u is *NOT* a user\n", (unsigned)rid));
+ return False;
+ }
+ *puid = fallback_pdb_user_rid_to_uid(rid);
+ 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 *psid, gid_t *pgid, enum SID_NAME_USE *sidtype)
+{
+ unid_t id;
+ int type;
+
+ DEBUG(10,("sid_to_gid: sid = [%s]\n", sid_string_static(psid)));
+
+ *sidtype = SID_NAME_ALIAS;
+
+ type = ID_GROUPID;
+ if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&id, &type, psid))) {
+ DEBUG(10,("sid_to_gid: gid = [%d]\n", id.gid));
+ *pgid = id.gid;
+ return True;
+ }
+
+ if (sid_compare_domain(get_global_sam_sid(), psid) == 0) {
+ GROUP_MAP map;
+ BOOL result;
+
+ if (pdb_getgrsid(&map, *psid, MAPPING_WITHOUT_PRIV)) {
+ /* the SID is in the mapping table but not mapped */
+ if (map.gid==(gid_t)-1)
+ return False;
+
+ *pgid = map.gid;
+ *sidtype = map.sid_name_use;
+ return True;
+ } else {
+ uint32 rid;
+
+ if (!sid_peek_rid(psid, &rid)) {
+ DEBUG(0, ("sid_to_gid: Error extracting RID from SID\n!"));
+ return False;
+ }
+ if (pdb_rid_is_user(rid)) {
+ DEBUG(3, ("sid_to_gid: RID %u is *NOT* a group\n", (unsigned)rid));
+ return False;
+ }
+ *pgid = pdb_group_rid_to_gid(rid);
+ *sidtype = SID_NAME_ALIAS;
+ }
+ }
+
+ return False;
+}
+