1#! /usr/bin/python -Es 2# Copyright (C) 2012 Red Hat 3# see file 'COPYING' for use and warranty information 4# 5# setrans is a tool for analyzing process transistions in SELinux policy 6# 7# This program is free software; you can redistribute it and/or 8# modify it under the terms of the GNU General Public License as 9# published by the Free Software Foundation; either version 2 of 10# the License, or (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program; if not, write to the Free Software 19# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 20# 02111-1307 USA 21# 22# 23import sepolicy 24import sys 25search = sepolicy.search 26info = sepolicy.info 27 28 29def usage(parser, msg): 30 parser.print_help() 31 32 sys.stderr.write("\n%s\n" % msg) 33 sys.stderr.flush() 34 sys.exit(1) 35 36 37def expand_attribute(attribute): 38 try: 39 return info(sepolicy.ATTRIBUTE, attribute)[0]["types"] 40 except RuntimeError: 41 return [attribute] 42 43 44def get_types(src, tclass, perm): 45 allows = search([sepolicy.ALLOW], {sepolicy.SOURCE: src, sepolicy.CLASS: tclass, sepolicy.PERMS: perm}) 46 if not allows: 47 raise ValueError("The %s type is not allowed to %s any types" % (src, ",".join(perm))) 48 49 tlist = [] 50 for l in map(lambda y: y[sepolicy.TARGET], filter(lambda x: set(perm).issubset(x[sepolicy.PERMS]), allows)): 51 tlist = tlist + expand_attribute(l) 52 return tlist 53