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# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: t -*-
# vi: set ft=python sts=4 ts=4 sw=4 noet :

# This file is part of Fail2Ban.
#
# Fail2Ban 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; either version 2 of the License, or
# (at your option) any later version.
#
# Fail2Ban 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 Fail2Ban; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

# Author: Cyril Jaquier
# 

__author__ = "Cyril Jaquier"
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
__license__ = "GPL"

import unittest
import time
import datetime

from ..server.datedetector import DateDetector
from ..server.datetemplate import DateTemplate
from .utils import setUpMyTime, tearDownMyTime


class DateDetectorTest(unittest.TestCase):

	def setUp(self):
		"""Call before every test case."""
		setUpMyTime()
		self.__datedetector = DateDetector()
		self.__datedetector.addDefaultTemplate()

	def tearDown(self):
		"""Call after every test case."""
		tearDownMyTime()
	
	def testGetEpochTime(self):
		# correct epoch time, using all variants:
		for dateUnix in (1138049999, 32535244799):
			for date in ("%s", "[%s]", "[%s.555]", "audit(%s.555:101)"):
				date = date % dateUnix
				log = date + " [sshd] error: PAM: Authentication failure"
				datelog = self.__datedetector.getTime(log)
				self.assertTrue(datelog, "Parse epoch time for %s failed" % (date,))
				( datelog, matchlog ) = datelog
				self.assertEqual(int(datelog), dateUnix)
				self.assertIn(matchlog.group(), (str(dateUnix), str(dateUnix)+'.555'))
		# wrong, no epoch time (< 10 digits, more as 11 digits, begin/end of word) :
		for dateUnix in ('123456789', '9999999999999999', '1138049999A', 'A1138049999'):
			for date in ("%s", "[%s]", "[%s.555]", "audit(%s.555:101)"):
				date = date % dateUnix
				log = date + " [sshd] error: PAM: Authentication failure"
				datelog = self.__datedetector.getTime(log)
				self.assertFalse(datelog)
	
	def testGetTime(self):
		log = "Jan 23 21:59:59 [sshd] error: PAM: Authentication failure"
		dateUnix = 1106513999.0
		# yoh: testing only up to 6 elements, since the day of the week
		#      is not correctly determined atm, since year is not present
		#      in the log entry.  Since this doesn't effect the operation
		#      of fail2ban -- we just ignore incorrect day of the week
		( datelog, matchlog ) = self.__datedetector.getTime(log)
		self.assertEqual(datelog, dateUnix)
		self.assertEqual(matchlog.group(), 'Jan 23 21:59:59')

	def testVariousTimes(self):
		"""Test detection of various common date/time formats f2b should understand
		"""
		dateUnix = 1106513999.0

		for anchored, sdate in (
			(False, "Jan 23 21:59:59"),
			(False, "Sun Jan 23 21:59:59 2005"),
			(False, "Sun Jan 23 21:59:59"),
			(False, "Sun Jan 23 2005 21:59:59"),
			(False, "2005/01/23 21:59:59"),
			(False, "2005.01.23 21:59:59"),
			(False, "23/01/2005 21:59:59"),
			(False, "23/01/05 21:59:59"),
			(False, "23/Jan/2005:21:59:59"),
			(False, "23/Jan/2005:21:59:59 +0100"),
			(False, "01/23/2005:21:59:59"),
			(False, "2005-01-23 21:59:59"),
		    (False, "2005-01-23 21:59:59,000"),	  # proftpd
			(False, "23-Jan-2005 21:59:59"),
			(False, "23-Jan-2005 21:59:59.02"),
			(False, "23-Jan-2005 21:59:59 +0100"),
			(False, "23-01-2005 21:59:59"),
			(True, "1106513999"), # Portsetry
			(False, "01-23-2005 21:59:59.252"), # reported on f2b, causes Feb29 fix to break
			(False, "@4000000041f4104f00000000"), # TAI64N
			(False, "2005-01-23T20:59:59.252Z"), #ISO 8601 (UTC)
			(False, "2005-01-23T15:59:59-05:00"), #ISO 8601 with TZ
			(False, "2005-01-23T21:59:59"), #ISO 8601 no TZ, assume local
			(True,  "<01/23/05@21:59:59>"),
			(True,  "050123 21:59:59"), # MySQL
			(True,  "Jan-23-05 21:59:59"), # ASSP like
			(False, "Jan 23, 2005 9:59:59 PM"), # Apache Tomcat
			(True,  "1106513999"), # Regular epoch
			(True,  "1106513999.000"), # Regular epoch with millisec
			(False, "audit(1106513999.000:987)"), # SELinux
			):
			for should_match, prefix in ((True,     ""),
										 (not anchored, "bogus-prefix ")):
				log = prefix + sdate + "[sshd] error: PAM: Authentication failure"

				logtime = self.__datedetector.getTime(log)
				if should_match:
					self.assertNotEqual(logtime, None, "getTime retrieved nothing: failure for %s, anchored: %r, log: %s" % ( sdate, anchored, log))
					( logUnix, logMatch ) = logtime
					self.assertEqual(logUnix, dateUnix, "getTime comparison failure for %s: \"%s\" is not \"%s\"" % (sdate, logUnix, dateUnix))
					if sdate.startswith('audit('):
						# yes, special case, the group only matches the number
						self.assertEqual(logMatch.group(), '1106513999.000')
					else:
						self.assertEqual(logMatch.group(), sdate)
				else:
					self.assertEqual(logtime, None, "getTime should have not matched for %r Got: %s" % (sdate, logtime))

	def testStableSortTemplate(self):
		old_names = [x.name for x in self.__datedetector.templates]
		self.__datedetector.sortTemplate()
		# If there were no hits -- sorting should not change the order
		for old_name, n in zip(old_names, self.__datedetector.templates):
			self.assertEqual(old_name, n.name) # "Sort must be stable"

	def testAllUniqueTemplateNames(self):
		self.assertRaises(ValueError, self.__datedetector.appendTemplate,
						  self.__datedetector.templates[0])

	def testFullYearMatch_gh130(self):
		# see https://github.com/fail2ban/fail2ban/pull/130
		# yoh: unfortunately this test is not really effective to reproduce the
		#      situation but left in place to assure consistent behavior
		mu = time.mktime(datetime.datetime(2012, 10, 11, 2, 37, 17).timetuple())
		logdate = self.__datedetector.getTime('2012/10/11 02:37:17 [error] 18434#0')
		self.assertNotEqual(logdate, None)
		( logTime, logMatch ) = logdate
		self.assertEqual(logTime, mu)
		self.assertEqual(logMatch.group(), '2012/10/11 02:37:17')
		self.__datedetector.sortTemplate()
		# confuse it with year being at the end
		for i in xrange(10):
			( logTime, logMatch ) =	self.__datedetector.getTime('11/10/2012 02:37:17 [error] 18434#0')
			self.assertEqual(logTime, mu)
			self.assertEqual(logMatch.group(), '11/10/2012 02:37:17')
		self.__datedetector.sortTemplate()
		# and now back to the original
		( logTime, logMatch ) = self.__datedetector.getTime('2012/10/11 02:37:17 [error] 18434#0')
		self.assertEqual(logTime, mu)
		self.assertEqual(logMatch.group(), '2012/10/11 02:37:17')

	def testDateTemplate(self):
			t = DateTemplate()
			t.setRegex('^a{3,5}b?c*$')
			self.assertEqual(t.getRegex(), '^a{3,5}b?c*$')
			self.assertRaises(Exception, t.getDate, '')
			self.assertEqual(t.matchDate('aaaac').group(), 'aaaac')


#	def testDefaultTempate(self):
#		self.__datedetector.setDefaultRegex("^\S{3}\s{1,2}\d{1,2} \d{2}:\d{2}:\d{2}")
#		self.__datedetector.setDefaultPattern("%b %d %H:%M:%S")
#		
#		log = "Jan 23 21:59:59 [sshd] error: PAM: Authentication failure"
#		date = [2005, 1, 23, 21, 59, 59, 1, 23, -1]
#		dateUnix = 1106513999.0
#		
#		self.assertEqual(self.__datedetector.getTime(log), date)
#		self.assertEqual(self.__datedetector.getUnixTime(log), dateUnix)