/* 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,("idmap_uid_to_sid: uid = [%lu], domain = '%s'\n", (unsigned long)uid, domname?domname:"NULL")); 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,("idmap_gid_to_si: gid = [%lu], domain = '%s'\n", (unsigned long)gid, domname?domname:"NULL")); if (idmap_cache_find_gid2sid(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_sid2gid(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], domain = '%s'\n", sid_string_dbg(sid), dom_name)); 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], domain = '%s'\n", sid_string_dbg(sid), domname)); 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; }