Viewing file: audit2allow (9.51 KB) -rwxr-xr-x Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |#! /usr/bin/python -E
# Authors: Karl MacMillan
#
# Copyright (C) 2006-2007 Red Hat
# see file 'COPYING' for use and warranty information
#
# 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; version 2 only
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
import sys
import tempfile
import sepolgen.audit as audit
import sepolgen.policygen as policygen
import sepolgen.interfaces as interfaces
import sepolgen.output as output
import sepolgen.objectmodel as objectmodel
import sepolgen.defaults as defaults
import sepolgen.module as module
from sepolgen.sepolgeni18n import _
class AuditToPolicy:
VERSION = "%prog .1"
SYSLOG = "/var/log/messages"
def __init__(self):
self.__options = None
self.__parser = None
self.__avs = None
def __parse_options(self):
from optparse import OptionParser
parser = OptionParser(version=self.VERSION)
parser.add_option("-a", "--all", action="store_true", dest="audit", default=False,
help="read input from audit log - conflicts with -i")
parser.add_option("-d", "--dmesg", action="store_true", dest="dmesg", default=False,
help="read input from dmesg - conflicts with --audit and --input")
parser.add_option("-i", "--input", dest="input",
help="read input from - conflicts with -a")
parser.add_option("-l", "--lastreload", action="store_true", dest="lastreload", default=False,
help="read input only after the last reload")
parser.add_option("-r", "--requires", action="store_true", dest="requires", default=False,
help="generate require statements for rules")
parser.add_option("-m", "--module", dest="module",
help="set the module name - implies --requires")
parser.add_option("-M", "--module-package", dest="module_package",
help="generate a module package - conflicts with -o and -m")
parser.add_option("-o", "--output", dest="output",
help="append output to , conflicts with -M")
parser.add_option("-R", "--reference", action="store_true", dest="refpolicy",
default=False, help="generate refpolicy style output")
parser.add_option("-v", "--verbose", action="store_true", dest="verbose",
default=False, help="explain generated output")
parser.add_option("-e", "--explain", action="store_true", dest="explain_long",
default=False, help="fully explain generated output")
parser.add_option("-t", "--type", help="only process messages with a type that matches this regex",
dest="type")
parser.add_option("--perm-map", dest="perm_map", help="file name of perm map")
parser.add_option("--interface-info", dest="interface_info", help="file name of interface information")
parser.add_option("--debug", dest="debug", action="store_true", default=False,
help="leave generated modules for -M")
options, args = parser.parse_args()
# Make -d, -a, and -i conflict
if options.audit is True:
if options.input is not None:
sys.stderr.write("error: --audit conflicts with --input\n")
if options.dmesg is True:
sys.stderr.write("error: --audit conflicts with --dmesg\n")
if options.input is not None and options.dmesg is True:
sys.stderr.write("error: --input conflicts with --dmesg\n")
# Turn on requires generation if a module name is given. Also verify
# the module name.
if options.module:
name = options.module
else:
name = options.module_package
if name:
options.requires = True
if not module.is_valid_name(name):
sys.stderr.write("only letters and numbers allowed in module names\n")
sys.exit(2)
# Make -M and -o conflict
if options.module_package:
if options.output:
sys.stderr.write("error: --module-package conflicts with --output\n")
sys.exit(2)
if options.module:
sys.stderr.write("error: --module-package conflicts with --module\n")
sys.exit(2)
self.__options = options
def __read_input(self):
parser = audit.AuditParser(last_load_only=self.__options.lastreload)
filename = None
messages = None
f = None
# Figure out what input we want
if self.__options.input is not None:
filename = self.__options.input
elif self.__options.dmesg:
messages = audit.get_dmesg_msgs()
elif self.__options.audit:
try:
messages = audit.get_audit_msgs()
except OSError, e:
sys.stderr.write('could not run ausearch - "%s"\n' % str(e))
sys.exit(1)
else:
# This is the default if no input is specified
f = sys.stdin
# Get the input
if filename is not None:
try:
f = open(filename)
except IOError, e:
sys.stderr.write('could not open file %s - "%s"\n' % (filename, str(e)))
sys.exit(1)
if f is not None:
parser.parse_file(f)
f.close()
if messages is not None:
parser.parse_string(messages)
self.__parser = parser
def __process_input(self):
if self.__options.type:
filter = audit.TypeFilter(self.__options.type)
self.__avs = self.__parser.to_access(filter)
else:
self.__avs = self.__parser.to_access()
def __load_interface_info(self):
# Load interface info file
if self.__options.interface_info:
fn = self.__options.interface_info
else:
fn = defaults.interface_info()
try:
fd = open(fn)
except:
sys.stderr.write("could not open interface info [%s]\n" % fn)
sys.exit(1)
ifs = interfaces.InterfaceSet()
ifs.from_file(fd)
fd.close()
# Also load perm maps
if self.__options.perm_map:
fn = self.__options.perm_map
else:
fn = defaults.perm_map()
try:
fd = open(fn)
except:
sys.stderr.write("could not open perm map [%s]\n" % fn)
sys.exit(1)
perm_maps = objectmodel.PermMappings()
perm_maps.from_file(fd)
return (ifs, perm_maps)
def __output_modulepackage(self, writer, generator):
generator.set_module_name(self.__options.module_package)
filename = self.__options.module_package + ".te"
packagename = self.__options.module_package + ".pp"
try:
fd = open(filename, "w")
except IOError, e:
sys.stderr.write("could not write output file: %s\n", str(e))
sys.exit(1)
writer.write(generator.get_module(), fd)
fd.close()
mc = module.ModuleCompiler()
try:
mc.create_module_package(filename, self.__options.refpolicy)
except RuntimeError, e:
print e
sys.exit(1)
sys.stdout.write(_("******************** IMPORTANT ***********************\n"))
sys.stdout.write((_("To make this policy package active, execute:" +\
"\n\nsemodule -i %s\n\n") % packagename))
def __output(self):
g = policygen.PolicyGenerator()
if self.__options.module:
g.set_module_name(self.__options.module)
# Interface generation
if self.__options.refpolicy:
ifs, perm_maps = self.__load_interface_info()
g.set_gen_refpol(ifs, perm_maps)
# Explanation
if self.__options.verbose:
g.set_gen_explain(policygen.SHORT_EXPLANATION)
if self.__options.explain_long:
g.set_gen_explain(policygen.LONG_EXPLANATION)
# Requires
if self.__options.requires:
g.set_gen_requires(True)
# Generate the policy
g.add_access(self.__avs)
# Output
writer = output.ModuleWriter()
# Module package
if self.__options.module_package:
self.__output_modulepackage(writer, g)
else:
# File or stdout
if self.__options.module:
g.set_module_name(self.__options.module)
if self.__options.output:
fd = open(self.__options.output, "w")
else:
fd = sys.stdout
writer.write(g.get_module(), fd)
def main(self):
try:
self.__parse_options()
self.__read_input()
self.__process_input()
self.__output()
except KeyboardInterrupt:
sys.exit(0)
if __name__ == "__main__":
app = AuditToPolicy()
app.main()