mirror of https://github.com/fail2ban/fail2ban
629 lines
21 KiB
Python
629 lines
21 KiB
Python
# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: t -*-
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# vi: set ft=python sts=4 ts=4 sw=4 noet :
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# This file is part of Fail2Ban.
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#
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# Fail2Ban 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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# Fail2Ban 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 Fail2Ban; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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# Fail2Ban developers
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__copyright__ = "Copyright (c) 2004 Cyril Jaquier; 2012 Yaroslav Halchenko"
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__license__ = "GPL"
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import unittest
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import os
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import sys
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import time
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import tempfile
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from server.filterpoll import FilterPoll
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from server.filter import FileFilter, DNSUtils
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from server.failmanager import FailManager
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from server.failmanager import FailManagerEmpty
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#
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# Useful helpers
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#
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def _killfile(f, name):
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try:
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f.close()
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except:
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pass
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try:
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os.unlink(name)
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except:
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pass
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def _sleep_4_poll():
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"""PollFilter relies on file timestamps - so we might need to
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sleep to guarantee that they differ
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"""
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if sys.version_info[:2] <= (2,4):
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# on old Python st_mtime is int, so we should give
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# at least 1 sec so polling filter could detect
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# the change
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time.sleep(1.)
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else:
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time.sleep(0.1)
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def _assert_equal_entries(utest, found, output, count=None):
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"""Little helper to unify comparisons with the target entries
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and report helpful failure reports instead of millions of seconds ;)
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"""
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utest.assertEqual(found[0], output[0]) # IP
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utest.assertEqual(found[1], count or output[1]) # count
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found_time, output_time = \
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time.localtime(found[2]),\
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time.localtime(output[2])
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utest.assertEqual(found_time, output_time)
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if len(output) > 3 and count is None: # match matches
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# do not check if custom count (e.g. going through them twice)
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utest.assertEqual(repr(found[3]), repr(output[3]))
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def _assert_correct_last_attempt(utest, filter_, output, count=None):
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"""Additional helper to wrap most common test case
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Test filter to contain target ticket
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"""
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if isinstance(filter_, DummyJail):
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ticket = filter_.getFailTicket()
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else:
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# when we are testing without jails
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ticket = filter_.failManager.toBan()
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attempts = ticket.getAttempt()
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date = ticket.getTime()
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ip = ticket.getIP()
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matches = ticket.getMatches()
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found = (ip, attempts, date, matches)
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_assert_equal_entries(utest, found, output, count)
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def _copy_lines_between_files(fin, fout, n=None, skip=0, mode='a', terminal_line=""):
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"""Copy lines from one file to another (which might be already open)
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Returns open fout
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"""
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if sys.version_info[:2] <= (2,4):
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# on old Python st_mtime is int, so we should give at least 1 sec so
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# polling filter could detect the change
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time.sleep(1)
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if isinstance(fin, str):
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fin = open(fin, 'r')
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if isinstance(fout, str):
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fout = open(fout, mode)
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# Skip
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for i in xrange(skip):
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_ = fin.readline()
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# Read/Write
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i = 0
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while n is None or i < n:
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l = fin.readline()
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if terminal_line is not None and l == terminal_line:
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break
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fout.write(l)
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fout.flush()
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i += 1
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# to give other threads possibly some time to crunch
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time.sleep(0.1)
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return fout
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#
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# Actual tests
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#
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class IgnoreIP(unittest.TestCase):
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def setUp(self):
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"""Call before every test case."""
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self.filter = FileFilter(None)
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def tearDown(self):
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"""Call after every test case."""
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def testIgnoreIPOK(self):
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ipList = "127.0.0.1", "192.168.0.1", "255.255.255.255", "99.99.99.99"
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for ip in ipList:
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self.filter.addIgnoreIP(ip)
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self.assertTrue(self.filter.inIgnoreIPList(ip))
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# Test DNS
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self.filter.addIgnoreIP("www.epfl.ch")
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self.assertTrue(self.filter.inIgnoreIPList("128.178.50.12"))
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def testIgnoreIPNOK(self):
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ipList = "", "999.999.999.999", "abcdef", "192.168.0."
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for ip in ipList:
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self.filter.addIgnoreIP(ip)
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self.assertFalse(self.filter.inIgnoreIPList(ip))
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# Test DNS
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self.filter.addIgnoreIP("www.epfl.ch")
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self.assertFalse(self.filter.inIgnoreIPList("127.177.50.10"))
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class LogFile(unittest.TestCase):
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FILENAME = "testcases/files/testcase01.log"
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def setUp(self):
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"""Call before every test case."""
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self.filter = FilterPoll(None)
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self.filter.addLogPath(LogFile.FILENAME)
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def tearDown(self):
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"""Call after every test case."""
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pass
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#def testOpen(self):
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# self.filter.openLogFile(LogFile.FILENAME)
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def testIsModified(self):
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self.assertTrue(self.filter.isModified(LogFile.FILENAME))
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class LogFileMonitor(unittest.TestCase):
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"""Few more tests for FilterPoll API
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"""
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def setUp(self):
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"""Call before every test case."""
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self.filter = self.name = 'NA'
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_, self.name = tempfile.mkstemp('fail2ban', 'monitorfailures')
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self.file = open(self.name, 'a')
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self.filter = FilterPoll(None)
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self.filter.addLogPath(self.name)
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self.filter.setActive(True)
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self.filter.addFailRegex("(?:(?:Authentication failure|Failed [-/\w+]+) for(?: [iI](?:llegal|nvalid) user)?|[Ii](?:llegal|nvalid) user|ROOT LOGIN REFUSED) .*(?: from|FROM) <HOST>")
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def tearDown(self):
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_killfile(self.file, self.name)
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pass
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def isModified(self, delay=2.):
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"""Wait up to `delay` sec to assure that it was modified or not
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"""
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time0 = time.time()
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while time.time() < time0 + delay:
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if self.filter.isModified(self.name):
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return True
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time.sleep(0.1)
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return False
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def notModified(self):
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# shorter wait time for not modified status
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return not self.isModified(0.4)
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def testNewChangeViaIsModified(self):
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# it is a brand new one -- so first we think it is modified
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self.assertTrue(self.isModified())
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# but not any longer
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self.assertTrue(self.notModified())
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self.assertTrue(self.notModified())
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_sleep_4_poll() # to guarantee freshier mtime
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for i in range(4): # few changes
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# unless we write into it
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self.file.write("line%d\n" % i)
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self.file.flush()
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self.assertTrue(self.isModified())
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self.assertTrue(self.notModified())
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_sleep_4_poll() # to guarantee freshier mtime
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os.rename(self.name, self.name + '.old')
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# we are not signaling as modified whenever
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# it gets away
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self.assertTrue(self.notModified())
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f = open(self.name, 'a')
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self.assertTrue(self.isModified())
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self.assertTrue(self.notModified())
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_sleep_4_poll()
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f.write("line%d\n" % i)
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f.flush()
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self.assertTrue(self.isModified())
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self.assertTrue(self.notModified())
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_killfile(f, self.name)
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_killfile(self.name, self.name + '.old')
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pass
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def testNewChangeViaGetFailures_simple(self):
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# suck in lines from this sample log file
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self.filter.getFailures(self.name)
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self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
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# Now let's feed it with entries from the file
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_copy_lines_between_files(GetFailures.FILENAME_01, self.file, n=5)
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self.filter.getFailures(self.name)
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self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
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# and it should have not been enough
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_copy_lines_between_files(GetFailures.FILENAME_01, self.file, skip=5)
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self.filter.getFailures(self.name)
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_assert_correct_last_attempt(self, self.filter, GetFailures.FAILURES_01)
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def testNewChangeViaGetFailures_rewrite(self):
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#
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# if we rewrite the file at once
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self.file.close()
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_copy_lines_between_files(GetFailures.FILENAME_01, self.name)
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self.filter.getFailures(self.name)
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_assert_correct_last_attempt(self, self.filter, GetFailures.FAILURES_01)
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# What if file gets overridden
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# yoh: skip so we skip those 2 identical lines which our
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# filter "marked" as the known beginning, otherwise it
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# would not detect "rotation"
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self.file = _copy_lines_between_files(GetFailures.FILENAME_01, self.name,
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skip=3, mode='w')
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self.filter.getFailures(self.name)
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#self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
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_assert_correct_last_attempt(self, self.filter, GetFailures.FAILURES_01)
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def testNewChangeViaGetFailures_move(self):
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#
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# if we move file into a new location while it has been open already
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self.file = _copy_lines_between_files(GetFailures.FILENAME_01, self.name,
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n=14, mode='w')
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self.filter.getFailures(self.name)
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self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
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self.assertEqual(self.filter.failManager.getFailTotal(), 2)
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# move aside, but leaving the handle still open...
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os.rename(self.name, self.name + '.bak')
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_copy_lines_between_files(GetFailures.FILENAME_01, self.name, skip=14)
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self.filter.getFailures(self.name)
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_assert_correct_last_attempt(self, self.filter, GetFailures.FAILURES_01)
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self.assertEqual(self.filter.failManager.getFailTotal(), 3)
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from threading import Lock
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class DummyJail(object):
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"""A simple 'jail' to suck in all the tickets generated by Filter's
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"""
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def __init__(self):
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self.lock = Lock()
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self.queue = []
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def __len__(self):
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try:
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self.lock.acquire()
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return len(self.queue)
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finally:
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self.lock.release()
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def putFailTicket(self, ticket):
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try:
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self.lock.acquire()
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self.queue.append(ticket)
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finally:
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self.lock.release()
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def getFailTicket(self):
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try:
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self.lock.acquire()
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return self.queue.pop()
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finally:
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self.lock.release()
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def getName(self):
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return "DummyJail #%s with %d tickets" % (id(self), len(self))
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def get_monitor_failures_testcase(Filter_):
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"""Generator of TestCase's for different filters/backends
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"""
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class MonitorFailures(unittest.TestCase):
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def setUp(self):
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"""Call before every test case."""
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self.filter = self.name = 'NA'
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_, self.name = tempfile.mkstemp('fail2ban', 'monitorfailures')
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self.file = open(self.name, 'a')
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self.jail = DummyJail()
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self.filter = Filter_(self.jail)
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self.filter.addLogPath(self.name)
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self.filter.setActive(True)
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self.filter.addFailRegex("(?:(?:Authentication failure|Failed [-/\w+]+) for(?: [iI](?:llegal|nvalid) user)?|[Ii](?:llegal|nvalid) user|ROOT LOGIN REFUSED) .*(?: from|FROM) <HOST>")
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self.filter.start()
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# If filter is polling it would sleep a bit to guarantee that
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# we have initial time-stamp difference to trigger "actions"
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self._sleep_4_poll()
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#print "D: started filter %s" % self.filter
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def tearDown(self):
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#print "D: SLEEPING A BIT"
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#import time; time.sleep(5)
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#print "D: TEARING DOWN"
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self.filter.stop()
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#print "D: WAITING FOR FILTER TO STOP"
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self.filter.join() # wait for the thread to terminate
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#print "D: KILLING THE FILE"
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_killfile(self.file, self.name)
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pass
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def __str__(self):
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return "MonitorFailures%s(%s)" \
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% (Filter_, hasattr(self, 'name') and self.name or 'tempfile')
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def isFilled(self, delay=2.):
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"""Wait up to `delay` sec to assure that it was modified or not
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"""
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time0 = time.time()
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while time.time() < time0 + delay:
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if len(self.jail):
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return True
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time.sleep(0.1)
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return False
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def _sleep_4_poll(self):
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# Since FilterPoll relies on time stamps and some
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# actions might be happening too fast in the tests,
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# sleep a bit to guarantee reliable time stamps
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if isinstance(self.filter, FilterPoll):
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_sleep_4_poll()
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def isEmpty(self, delay=0.4):
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# shorter wait time for not modified status
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return not self.isFilled(delay)
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def assert_correct_last_attempt(self, failures, count=None):
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self.assertTrue(self.isFilled(10)) # give Filter a chance to react
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_assert_correct_last_attempt(self, self.jail, failures, count=count)
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def test_grow_file(self):
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# suck in lines from this sample log file
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self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
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# Now let's feed it with entries from the file
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_copy_lines_between_files(GetFailures.FILENAME_01, self.file, n=5)
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self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
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# and our dummy jail is empty as well
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self.assertFalse(len(self.jail))
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# since it should have not been enough
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_copy_lines_between_files(GetFailures.FILENAME_01, self.file, skip=5)
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self.assertTrue(self.isFilled(6))
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# so we sleep for up to 2 sec for it not to become empty,
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# and meanwhile pass to other thread(s) and filter should
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# have gathered new failures and passed them into the
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# DummyJail
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self.assertEqual(len(self.jail), 1)
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# and there should be no "stuck" ticket in failManager
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self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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self.assertEqual(len(self.jail), 0)
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#return
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# just for fun let's copy all of them again and see if that results
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# in a new ban
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_copy_lines_between_files(GetFailures.FILENAME_01, self.file, n=100)
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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def test_rewrite_file(self):
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# if we rewrite the file at once
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self.file.close()
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_copy_lines_between_files(GetFailures.FILENAME_01, self.name)
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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# What if file gets overridden
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# yoh: skip so we skip those 2 identical lines which our
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# filter "marked" as the known beginning, otherwise it
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# would not detect "rotation"
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self.file = _copy_lines_between_files(GetFailures.FILENAME_01, self.name,
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skip=3, mode='w')
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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def test_move_file(self):
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# if we move file into a new location while it has been open already
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self.file = _copy_lines_between_files(GetFailures.FILENAME_01, self.name,
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n=14, mode='w')
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self.assertTrue(self.isEmpty(2))
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self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
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self.assertEqual(self.filter.failManager.getFailTotal(), 2) # Fails with Poll from time to time
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# move aside, but leaving the handle still open...
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os.rename(self.name, self.name + '.bak')
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_copy_lines_between_files(GetFailures.FILENAME_01, self.name, skip=14)
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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self.assertEqual(self.filter.failManager.getFailTotal(), 3)
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# now remove the moved file
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_killfile(None, self.name + '.bak')
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_copy_lines_between_files(GetFailures.FILENAME_01, self.name, n=100)
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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self.assertEqual(self.filter.failManager.getFailTotal(), 6)
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def test_new_bogus_file(self):
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# to make sure that watching whole directory does not effect
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_copy_lines_between_files(GetFailures.FILENAME_01, self.name, n=100)
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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# create a bogus file in the same directory and see if that doesn't affect
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open(self.name + '.bak2', 'w').write('')
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_copy_lines_between_files(GetFailures.FILENAME_01, self.name, n=100)
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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self.assertEqual(self.filter.failManager.getFailTotal(), 6)
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_killfile(None, self.name + '.bak2')
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def test_delLogPath(self):
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# Smoke test for removing of the path from being watched
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# basic full test
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_copy_lines_between_files(GetFailures.FILENAME_01, self.file, n=100)
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self.assert_correct_last_attempt(GetFailures.FAILURES_01)
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# and now remove the LogPath
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self.filter.delLogPath(self.name)
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_copy_lines_between_files(GetFailures.FILENAME_01, self.file, n=100)
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# so we should get no more failures detected
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self.assertTrue(self.isEmpty(2))
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# but then if we add it back again
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self.filter.addLogPath(self.name)
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# Tricky catch here is that it should get them from the
|
|
# tail written before, so let's not copy anything yet
|
|
#_copy_lines_between_files(GetFailures.FILENAME_01, self.name, n=100)
|
|
# we should detect the failures
|
|
self.assert_correct_last_attempt(GetFailures.FAILURES_01, count=6) # was needed if we write twice above
|
|
|
|
# now copy and get even more
|
|
_copy_lines_between_files(GetFailures.FILENAME_01, self.file, n=100)
|
|
# yoh: not sure why count here is not 9... TODO
|
|
self.assert_correct_last_attempt(GetFailures.FAILURES_01)#, count=9)
|
|
|
|
|
|
return MonitorFailures
|
|
|
|
|
|
class GetFailures(unittest.TestCase):
|
|
|
|
FILENAME_01 = "testcases/files/testcase01.log"
|
|
FILENAME_02 = "testcases/files/testcase02.log"
|
|
FILENAME_03 = "testcases/files/testcase03.log"
|
|
FILENAME_04 = "testcases/files/testcase04.log"
|
|
FILENAME_USEDNS = "testcases/files/testcase-usedns.log"
|
|
|
|
# so that they could be reused by other tests
|
|
FAILURES_01 = ('193.168.0.128', 3, 1124013599.0,
|
|
['Aug 14 11:59:59 [sshd] error: PAM: Authentication failure for kevin from 193.168.0.128\n']*3)
|
|
|
|
def setUp(self):
|
|
"""Call before every test case."""
|
|
self.filter = FileFilter(None)
|
|
self.filter.setActive(True)
|
|
# TODO Test this
|
|
#self.filter.setTimeRegex("\S{3}\s{1,2}\d{1,2} \d{2}:\d{2}:\d{2}")
|
|
#self.filter.setTimePattern("%b %d %H:%M:%S")
|
|
|
|
def tearDown(self):
|
|
"""Call after every test case."""
|
|
|
|
|
|
|
|
def testGetFailures01(self):
|
|
self.filter.addLogPath(GetFailures.FILENAME_01)
|
|
self.filter.addFailRegex("(?:(?:Authentication failure|Failed [-/\w+]+) for(?: [iI](?:llegal|nvalid) user)?|[Ii](?:llegal|nvalid) user|ROOT LOGIN REFUSED) .*(?: from|FROM) <HOST>")
|
|
self.filter.getFailures(GetFailures.FILENAME_01)
|
|
_assert_correct_last_attempt(self, self.filter, GetFailures.FAILURES_01)
|
|
|
|
|
|
def testGetFailures02(self):
|
|
output = ('141.3.81.106', 4, 1124013539.0,
|
|
['Aug 14 11:%d:59 i60p295 sshd[12365]: Failed publickey for roehl from ::ffff:141.3.81.106 port 51332 ssh2\n'
|
|
% m for m in 53, 54, 57, 58])
|
|
|
|
self.filter.addLogPath(GetFailures.FILENAME_02)
|
|
self.filter.addFailRegex("Failed .* from <HOST>")
|
|
self.filter.getFailures(GetFailures.FILENAME_02)
|
|
_assert_correct_last_attempt(self, self.filter, output)
|
|
|
|
def testGetFailures03(self):
|
|
output = ('203.162.223.135', 6, 1124013544.0)
|
|
|
|
self.filter.addLogPath(GetFailures.FILENAME_03)
|
|
self.filter.addFailRegex("error,relay=<HOST>,.*550 User unknown")
|
|
self.filter.getFailures(GetFailures.FILENAME_03)
|
|
_assert_correct_last_attempt(self, self.filter, output)
|
|
|
|
def testGetFailures04(self):
|
|
output = [('212.41.96.186', 4, 1124013600.0),
|
|
('212.41.96.185', 4, 1124013598.0)]
|
|
|
|
self.filter.addLogPath(GetFailures.FILENAME_04)
|
|
self.filter.addFailRegex("Invalid user .* <HOST>")
|
|
self.filter.getFailures(GetFailures.FILENAME_04)
|
|
|
|
try:
|
|
for i, out in enumerate(output):
|
|
_assert_correct_last_attempt(self, self.filter, out)
|
|
except FailManagerEmpty:
|
|
pass
|
|
|
|
def testGetFailuresUseDNS(self):
|
|
# We should still catch failures with usedns = no ;-)
|
|
output_yes = ('192.0.43.10', 2, 1124013539.0,
|
|
['Aug 14 11:54:59 i60p295 sshd[12365]: Failed publickey for roehl from example.com port 51332 ssh2\n',
|
|
'Aug 14 11:58:59 i60p295 sshd[12365]: Failed publickey for roehl from ::ffff:192.0.43.10 port 51332 ssh2\n'])
|
|
|
|
output_no = ('192.0.43.10', 1, 1124013539.0,
|
|
['Aug 14 11:58:59 i60p295 sshd[12365]: Failed publickey for roehl from ::ffff:192.0.43.10 port 51332 ssh2\n'])
|
|
|
|
# Actually no exception would be raised -- it will be just set to 'no'
|
|
#self.assertRaises(ValueError,
|
|
# FileFilter, None, useDns='wrong_value_for_useDns')
|
|
|
|
for useDns, output in (('yes', output_yes),
|
|
('no', output_no),
|
|
('warn', output_yes)):
|
|
filter_ = FileFilter(None, useDns=useDns)
|
|
filter_.setActive(True)
|
|
filter_.failManager.setMaxRetry(1) # we might have just few failures
|
|
|
|
filter_.addLogPath(GetFailures.FILENAME_USEDNS)
|
|
filter_.addFailRegex("Failed .* from <HOST>")
|
|
filter_.getFailures(GetFailures.FILENAME_USEDNS)
|
|
_assert_correct_last_attempt(self, filter_, output)
|
|
|
|
|
|
|
|
def testGetFailuresMultiRegex(self):
|
|
output = ('141.3.81.106', 8, 1124013541.0)
|
|
|
|
self.filter.addLogPath(GetFailures.FILENAME_02)
|
|
self.filter.addFailRegex("Failed .* from <HOST>")
|
|
self.filter.addFailRegex("Accepted .* from <HOST>")
|
|
self.filter.getFailures(GetFailures.FILENAME_02)
|
|
_assert_correct_last_attempt(self, self.filter, output)
|
|
|
|
def testGetFailuresIgnoreRegex(self):
|
|
output = ('141.3.81.106', 8, 1124013541.0)
|
|
|
|
self.filter.addLogPath(GetFailures.FILENAME_02)
|
|
self.filter.addFailRegex("Failed .* from <HOST>")
|
|
self.filter.addFailRegex("Accepted .* from <HOST>")
|
|
self.filter.addIgnoreRegex("for roehl")
|
|
|
|
self.filter.getFailures(GetFailures.FILENAME_02)
|
|
|
|
self.assertRaises(FailManagerEmpty, self.filter.failManager.toBan)
|
|
|
|
class DNSUtilsTests(unittest.TestCase):
|
|
|
|
def testUseDns(self):
|
|
res = DNSUtils.textToIp('www.example.com', 'no')
|
|
self.assertEqual(res, [])
|
|
res = DNSUtils.textToIp('www.example.com', 'warn')
|
|
self.assertEqual(res, ['192.0.43.10'])
|
|
res = DNSUtils.textToIp('www.example.com', 'yes')
|
|
self.assertEqual(res, ['192.0.43.10'])
|
|
|
|
def testTextToIp(self):
|
|
# Test hostnames
|
|
hostnames = [
|
|
'www.example.com',
|
|
'doh1.2.3.4.buga.xxxxx.yyy.invalid',
|
|
'1.2.3.4.buga.xxxxx.yyy.invalid',
|
|
]
|
|
for s in hostnames:
|
|
res = DNSUtils.textToIp(s, 'yes')
|
|
if s == 'www.example.com':
|
|
self.assertEqual(res, ['192.0.43.10'])
|
|
else:
|
|
self.assertEqual(res, [])
|