mirror of
https://github.com/SELinuxProject/setools
synced 2025-02-20 22:17:03 +00:00
116 lines
4.2 KiB
Python
Executable File
116 lines
4.2 KiB
Python
Executable File
#!/usr/bin/python
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# Copyright 2014, Tresys Technology, LLC
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#
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# This file is part of SETools.
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#
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# SETools is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 2 of the License, or
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# (at your option) any later version.
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#
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# SETools is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with SETools. If not, see <http://www.gnu.org/licenses/>.
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#
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from __future__ import print_function
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import libapol
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import argparse
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import sys
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parser = argparse.ArgumentParser(description="SELinux policy information flow analysis tool.",
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epilog="If no analysis algorithm is selected, all information flow out of the source domain will be calculated.")
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parser.add_argument("--version", action="version", version=libapol.__version__)
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parser.add_argument("--stats", action="store_true",
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help="Display statistics at the end of the analysis.")
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settings = parser.add_argument_group("Analysis settings")
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settings.add_argument(
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"-p", "--policy", help="Path to SELinux policy to analyze.", required=True)
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settings.add_argument(
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"-m", "--map", help="Path to permission map file.", required=True)
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settings.add_argument(
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"-s", "--source", help="Source type of the analysis.", required=True, default="")
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settings.add_argument(
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"-t", "--target", help="Target type of the analysis.", default="")
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alg = parser.add_argument_group("Analysis algorithm")
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alg.add_argument("-S", "--shortest_path", action="store_true",
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help="Calculate all shortest paths.")
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alg.add_argument("-A", "--all_paths",
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help="Calculate all paths, with the specified maximum path length. (Expensive)", type=int, metavar="MAX_STEPS")
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opts = parser.add_argument_group("Analysis options")
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opts.add_argument("-w", "--min_weight",
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help="Minimum permission weight. Default is 3.", default=3, type=int)
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opts.add_argument("-l", "--limit_flows",
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help="Limit to the specified number of flows. Default is unlimited.", default=0, type=int)
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opts.add_argument(
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"exclude", help="List of excluded types in the analysis.", nargs="*")
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args = parser.parse_args()
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if not args.target and (args.shortest_path or args.all_paths):
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parser.error("The target type must be specified to determine a path.")
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if args.limit_flows < 0:
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parser.error("Limit on information flows cannot be negative.")
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try:
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p = libapol.SELinuxPolicy(args.policy)
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g = libapol.infoflow.InfoFlowAnalysis(
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p, args.map, minweight=args.min_weight, exclude=args.exclude)
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except Exception as err:
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print(err)
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sys.exit(1)
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if args.shortest_path or args.all_paths:
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try:
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if args.shortest_path:
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paths = g.all_shortest_paths(args.source, args.target)
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else:
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paths = g.all_paths(args.source, args.target, args.all_paths)
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except Exception as err:
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print(err)
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sys.exit(1)
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flownum = 0
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for flownum, path in enumerate(paths, start=1):
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print("Flow {0}:".format(flownum))
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for stepnum, (src, tgt, rules) in enumerate(path, start=1):
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print(" Step {0}: {1} -> {2}".format(stepnum, src, tgt))
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for rule in sorted(rules):
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print(" ", rule)
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print()
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if args.limit_flows and flownum >= args.limit_flows:
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break
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print()
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else: # single direct info flow
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flownum = 0
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for flownum, (src, tgt, rules) in enumerate(g.infoflows(args.source), start=1):
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print("Flow {0}: {1} -> {2}".format(flownum, src, tgt))
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for rule in sorted(rules):
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print(" ", rule)
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print()
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if args.limit_flows and flownum >= args.limit_flows:
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break
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print(flownum, "information flow(s) found.\n")
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if args.stats:
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print("Information flow graph size:")
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nnodes, nedges = g.get_stats()
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print(" Nodes:", nnodes)
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print(" Edges:", nedges)
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