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