Merge remote-tracking branch 'remotes/upstream/master' into sebres:ban-time-incr

ChangeLog

@@ -11,19 +11,26 @@ ver. 0.9.2 (2014/xx/xx) - increment ban time
 ----------
 
 - Fixes:
+   * purge database will be executed now (within observer).
+   * database functionality extended with bad ips.
+   * restoring currently banned ip after service restart fixed 
+     (now < timeofban + bantime), ignore old log failures (already banned)
    * $ typo in jail.conf. Thanks Skibbi. Debian bug #767255
    * grep'ing for IP in *mail-whois-lines.conf should now match also
      at the begginning and EOL.  Thanks Dean Lee
    * jail.conf
      - php-url-fopen: separate logpath entries by newline
-   * purge database will be executed now (within observer).
-   * database functionality extended with bad ips.
-   * restoring currently banned ip after service restart fixed 
-     (now < timeofban + bantime), ignore old log failures (already banned)
+   * failregex declared direct in jail was joined to single line (specifying of
+     multiple expressions was not possible).
 
 - New Features:
    * increment ban time (+ observer) functionality introduced.
      Thanks Serg G. Brester (sebres)
+   * New interpolation feature for config readers - `%(known/parameter)s`.
+     (means last known option with name `parameter`). This interpolation makes
+     possible to extend a stock filter or jail regexp in .local file
+     (opposite to simply set failregex/ignoreregex that overwrites it),
+     see gh-867.
 
 - Enhancements:
    * Enable multiport for firewallcmd-new action.  Closes gh-834

fail2ban/client/configparserinc.py

@@ -226,6 +226,13 @@ after = 1.conf
 						if isinstance(s, dict):
 							s2 = alls.get(n)
 							if isinstance(s2, dict):
+								# save previous known values, for possible using in local interpolations later:
+								sk = {}
+								for k, v in s2.iteritems():
+									if not k.startswith('known/'):
+										sk['known/'+k] = v
+								s2.update(sk)
+								# merge section
 								s2.update(s)
 							else:
 								alls[n] = s.copy()
@@ -242,3 +249,12 @@ after = 1.conf
 			return SafeConfigParser.read(self, fileNamesFull, encoding='utf-8')
 		else:
 			return SafeConfigParser.read(self, fileNamesFull)
+
+	def merge_section(self, section, options, pref='known/'):
+		alls = self.get_sections()
+		sk = {}
+		for k, v in options.iteritems():
+			if pref == '' or not k.startswith(pref):
+				sk[pref+k] = v
+		alls[section].update(sk)
+

fail2ban/client/configreader.py

@@ -116,6 +116,10 @@ class ConfigReader():
 			return self._cfg.has_section(sec)
 		return False
 
+	def merge_section(self, *args, **kwargs):
+		if self._cfg is not None:
+			return self._cfg.merge_section(*args, **kwargs)
+
 	def options(self, *args):
 		if self._cfg is not None:
 			return self._cfg.options(*args)

fail2ban/client/filterreader.py

@@ -47,12 +47,20 @@ class FilterReader(DefinitionInitConfigReader):
 	def getFile(self):
 		return self.__file
 
-	def convert(self):
-		stream = list()
+	def getCombined(self):
 		combinedopts = dict(list(self._opts.items()) + list(self._initOpts.items()))
+		if not len(combinedopts):
+			return {};
 		opts = CommandAction.substituteRecursiveTags(combinedopts)
 		if not opts:
 			raise ValueError('recursive tag definitions unable to be resolved')
+		return opts;
+	
+	def convert(self):
+		stream = list()
+		opts = self.getCombined()
+		if not len(opts):
+			return stream;
 		for opt, value in opts.iteritems():
 			if opt == "failregex":
 				for regex in value.split('\n'):

fail2ban/client/jailreader.py

@@ -87,6 +87,8 @@ class JailReader(ConfigReader):
 		return pathList
 
 	def getOptions(self):
+		opts1st = [["bool", "enabled", False],
+				["string", "filter", ""]]
 		opts = [["bool", "enabled", False],
 				["string", "logpath", None],
 				["string", "logencoding", None],
@@ -108,7 +110,9 @@ class JailReader(ConfigReader):
 				["string", "ignoreip", None],
 				["string", "filter", ""],
 				["string", "action", ""]]
-		self.__opts = ConfigReader.getOptions(self, self.__name, opts)
+
+		# Read first options only needed for merge defaults ('known/...' from filter):
+		self.__opts = ConfigReader.getOptions(self, self.__name, opts1st)
 		if not self.__opts:
 			return False
 		
@@ -120,15 +124,25 @@ class JailReader(ConfigReader):
 				self.__filter = FilterReader(
 					filterName, self.__name, filterOpt, share_config=self.share_config, basedir=self.getBaseDir())
 				ret = self.__filter.read()
-				if ret:
+				# merge options from filter as 'known/...':
 				self.__filter.getOptions(self.__opts)
-				else:
+				ConfigReader.merge_section(self, self.__name, self.__filter.getCombined(), 'known/')
+				if not ret:
 					logSys.error("Unable to read the filter")
 					return False
 			else:
 				self.__filter = None
 				logSys.warning("No filter set for jail %s" % self.__name)
 
+			# Read second all options (so variables like %(known/param) can be interpolated):
+			self.__opts = ConfigReader.getOptions(self, self.__name, opts)
+			if not self.__opts:
+				return False
+		
+			# cumulate filter options again (ignore given in jail):
+			if self.__filter:
+				self.__filter.getOptions(self.__opts)
+		
 			# Read action
 			for act in self.__opts["action"].split('\n'):
 				try:
@@ -211,7 +225,10 @@ class JailReader(ConfigReader):
 			elif opt == "usedns":
 				stream.append(["set", self.__name, "usedns", self.__opts[opt]])
 			elif opt == "failregex":
-				stream.append(["set", self.__name, "addfailregex", self.__opts[opt]])
+				for regex in self.__opts[opt].split('\n'):
+					# Do not send a command if the rule is empty.
+					if regex != '':
+						stream.append(["set", self.__name, "addfailregex", regex])
 			elif opt == "ignorecommand":
 				stream.append(["set", self.__name, "ignorecommand", self.__opts[opt]])
 			elif opt == "ignoreregex":

fail2ban/tests/clientreadertestcase.py

@@ -155,12 +155,16 @@ c = d ;in line comment
 
 class JailReaderTest(LogCaptureTestCase):
 
+	def __init__(self, *args, **kwargs):
+		super(JailReaderTest, self).__init__(*args, **kwargs)
+		self.__share_cfg = {}
+
 	def testIncorrectJail(self):
-		jail = JailReader('XXXABSENTXXX', basedir=CONFIG_DIR)
+		jail = JailReader('XXXABSENTXXX', basedir=CONFIG_DIR, share_config = self.__share_cfg)
 		self.assertRaises(ValueError, jail.read)
 		
 	def testJailActionEmpty(self):
-		jail = JailReader('emptyaction', basedir=IMPERFECT_CONFIG)
+		jail = JailReader('emptyaction', basedir=IMPERFECT_CONFIG, share_config = self.__share_cfg)
 		self.assertTrue(jail.read())
 		self.assertTrue(jail.getOptions())
 		self.assertTrue(jail.isEnabled())
@@ -168,7 +172,7 @@ class JailReaderTest(LogCaptureTestCase):
 		self.assertTrue(self._is_logged('No actions were defined for emptyaction'))
 
 	def testJailActionFilterMissing(self):
-		jail = JailReader('missingbitsjail', basedir=IMPERFECT_CONFIG)
+		jail = JailReader('missingbitsjail', basedir=IMPERFECT_CONFIG, share_config = self.__share_cfg)
 		self.assertTrue(jail.read())
 		self.assertFalse(jail.getOptions())
 		self.assertTrue(jail.isEnabled())
@@ -176,7 +180,7 @@ class JailReaderTest(LogCaptureTestCase):
 		self.assertTrue(self._is_logged('Unable to read the filter'))
 
 	def TODOtestJailActionBrokenDef(self):
-		jail = JailReader('brokenactiondef', basedir=IMPERFECT_CONFIG)
+		jail = JailReader('brokenactiondef', basedir=IMPERFECT_CONFIG, share_config = self.__share_cfg)
 		self.assertTrue(jail.read())
 		self.assertFalse(jail.getOptions())
 		self.assertTrue(jail.isEnabled())
@@ -187,7 +191,7 @@ class JailReaderTest(LogCaptureTestCase):
 
 	if STOCK:
 		def testStockSSHJail(self):
-			jail = JailReader('sshd', basedir=CONFIG_DIR) # we are running tests from root project dir atm
+			jail = JailReader('sshd', basedir=CONFIG_DIR, share_config = self.__share_cfg) # we are running tests from root project dir atm
 			self.assertTrue(jail.read())
 			self.assertTrue(jail.getOptions())
 			self.assertFalse(jail.isEnabled())
@@ -411,13 +415,17 @@ class JailsReaderTestCache(LogCaptureTestCase):
 
 class JailsReaderTest(LogCaptureTestCase):
 
+	def __init__(self, *args, **kwargs):
+		super(JailsReaderTest, self).__init__(*args, **kwargs)
+		self.__share_cfg = {}
+
 	def testProvidingBadBasedir(self):
 		if not os.path.exists('/XXX'):
 			reader = JailsReader(basedir='/XXX')
 			self.assertRaises(ValueError, reader.read)
 
 	def testReadTestJailConf(self):
-		jails = JailsReader(basedir=IMPERFECT_CONFIG)
+		jails = JailsReader(basedir=IMPERFECT_CONFIG, share_config=self.__share_cfg)
 		self.assertTrue(jails.read())
 		self.assertFalse(jails.getOptions())
 		self.assertRaises(ValueError, jails.convert)
@@ -425,6 +433,11 @@ class JailsReaderTest(LogCaptureTestCase):
 		self.maxDiff = None
 		self.assertEqual(sorted(comm_commands),
 			sorted([['add', 'emptyaction', 'auto'],
+			 ['add', 'test-known-interp', 'auto'],
+			 ['set', 'test-known-interp', 'addfailregex', 'failure test 1 (filter.d/test.conf) <HOST>'],
+			 ['set', 'test-known-interp', 'addfailregex', 'failure test 2 (filter.d/test.local) <HOST>'],
+			 ['set', 'test-known-interp', 'addfailregex', 'failure test 3 (jail.local) <HOST>'],
+			 ['start', 'test-known-interp'],
 			 ['add', 'missinglogfiles', 'auto'],
 			 ['set', 'missinglogfiles', 'addfailregex', '<IP>'],
 			 ['add', 'brokenaction', 'auto'],
@@ -447,7 +460,7 @@ class JailsReaderTest(LogCaptureTestCase):
 
 	if STOCK:
 		def testReadStockJailConf(self):
-			jails = JailsReader(basedir=CONFIG_DIR) # we are running tests from root project dir atm
+			jails = JailsReader(basedir=CONFIG_DIR, share_config=self.__share_cfg) # we are running tests from root project dir atm
 			self.assertTrue(jails.read())		  # opens fine
 			self.assertTrue(jails.getOptions())	  # reads fine
 			comm_commands = jails.convert()
@@ -508,7 +521,7 @@ class JailsReaderTest(LogCaptureTestCase):
 
 		# Verify that all filters found under config/ have a jail
 		def testReadStockJailFilterComplete(self):
-			jails = JailsReader(basedir=CONFIG_DIR, force_enable=True)
+			jails = JailsReader(basedir=CONFIG_DIR, force_enable=True, share_config=self.__share_cfg)
 			self.assertTrue(jails.read())             # opens fine
 			self.assertTrue(jails.getOptions())       # reads fine
 			# grab all filter names
@@ -525,7 +538,7 @@ class JailsReaderTest(LogCaptureTestCase):
 		def testReadStockJailConfForceEnabled(self):
 			# more of a smoke test to make sure that no obvious surprises
 			# on users' systems when enabling shipped jails
-			jails = JailsReader(basedir=CONFIG_DIR, force_enable=True) # we are running tests from root project dir atm
+			jails = JailsReader(basedir=CONFIG_DIR, force_enable=True, share_config=self.__share_cfg) # we are running tests from root project dir atm
 			self.assertTrue(jails.read())		  # opens fine
 			self.assertTrue(jails.getOptions())	  # reads fine
 			comm_commands = jails.convert(allow_no_files=True)
@@ -620,7 +633,7 @@ action = testaction1[actname=test1]
 filter = testfilter1
 """)
 		jailfd.close()
-		jails = JailsReader(basedir=basedir)
+		jails = JailsReader(basedir=basedir, share_config=self.__share_cfg)
 		self.assertTrue(jails.read())
 		self.assertTrue(jails.getOptions())
 		comm_commands = jails.convert(allow_no_files=True)

fail2ban/tests/config/filter.d/test.conf

@@ -0,0 +1,6 @@
+#[INCLUDES]
+#before = common.conf
+
+[Definition]
+failregex = failure test 1 (filter.d/test.conf) <HOST>
+

fail2ban/tests/config/filter.d/test.local

@@ -0,0 +1,7 @@
+#[INCLUDES]
+#before = common.conf
+
+[Definition]
+failregex = %(known/failregex)s
+            failure test 2 (filter.d/test.local) <HOST>
+

fail2ban/tests/config/jail.conf

@@ -13,6 +13,12 @@ failregex = <IP>
 ignoreregex =
 ignoreip =
 
+[test-known-interp]
+enabled = true
+filter = test
+failregex = %(known/failregex)s
+            failure test 3 (jail.local) <HOST>
+
 [missinglogfiles]
 enabled = true
 logpath = /weapons/of/mass/destruction