This file is indexed.

/usr/bin/fail2ban-client is in fail2ban 0.8.6-3wheezy3.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
#!/usr/bin/python
# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

# Author: Cyril Jaquier
# 
# $Revision$

__author__ = "Cyril Jaquier"
__version__ = "$Revision$"
__date__ = "$Date$"
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
__license__ = "GPL"

import sys, string, os, pickle, re, logging, signal
import getopt, time, shlex, socket

# Inserts our own modules path first in the list
# fix for bug #343821
sys.path.insert(1, "/usr/share/fail2ban")

# Now we can import our modules
from common.version import version
from common.protocol import printFormatted
from client.csocket import CSocket
from client.configurator import Configurator
from client.beautifier import Beautifier

# Gets the instance of the logger.
logSys = logging.getLogger("fail2ban.client")

##
#
# @todo This class needs cleanup.

class Fail2banClient:

	SERVER = "fail2ban-server"
	PROMPT = "fail2ban> "

	def __init__(self):
		self.__argv = None
		self.__stream = None
		self.__configurator = Configurator()
		self.__conf = dict()
		self.__conf["conf"] = "/etc/fail2ban"
		self.__conf["dump"] = False
		self.__conf["force"] = False
		self.__conf["verbose"] = 1
		self.__conf["interactive"] = False
		self.__conf["socket"] = None
		
	def dispVersion(self):
		print "Fail2Ban v" + version
		print
		print "Copyright (c) 2004-2008 Cyril Jaquier"
		print "Copyright of modifications held by their respective authors."
		print "Licensed under the GNU General Public License v2 (GPL)."
		print
		print "Written by Cyril Jaquier <cyril.jaquier@fail2ban.org>."
		print "Many contributions by Yaroslav O. Halchenko <debian@onerussian.com>."
	
	def dispUsage(self):
		""" Prints Fail2Ban command line options and exits
		"""
		print "Usage: "+self.__argv[0]+" [OPTIONS] <COMMAND>"
		print
		print "Fail2Ban v" + version + " reads log file that contains password failure report"
		print "and bans the corresponding IP addresses using firewall rules."
		print
		print "Options:"
		print "    -c <DIR>                configuration directory"
		print "    -s <FILE>               socket path"
		print "    -d                      dump configuration. For debugging"
		print "    -i                      interactive mode"
		print "    -v                      increase verbosity"
		print "    -q                      decrease verbosity"
		print "    -x                      force execution of the server (remove socket file)"
		print "    -h, --help              display this help message"
		print "    -V, --version           print the version"
		print
		print "Command:"
		
		# Prints the protocol
		printFormatted()
		
		print
		print "Report bugs to <cyril.jaquier@fail2ban.org>"
	
	def dispInteractive(self):
		print "Fail2Ban v" + version + " reads log file that contains password failure report"
		print "and bans the corresponding IP addresses using firewall rules."
		print 

	def __sigTERMhandler(self, signum, frame):
		# Print a new line because we probably come from wait
		print
		logSys.warn("Caught signal %d. Exiting" % signum)
		sys.exit(-1)

	def __getCmdLineOptions(self, optList):
		""" Gets the command line options
		"""
		for opt in optList:
			if opt[0] == "-c":
				self.__conf["conf"] = opt[1]
			elif opt[0] == "-s":
				self.__conf["socket"] = opt[1]
			elif opt[0] == "-d":
				self.__conf["dump"] = True
			elif opt[0] == "-v":
				self.__conf["verbose"] = self.__conf["verbose"] + 1
			elif opt[0] == "-q":
				self.__conf["verbose"] = self.__conf["verbose"] - 1
			elif opt[0] == "-x":
				self.__conf["force"] = True
			elif opt[0] == "-i":
				self.__conf["interactive"] = True
			elif opt[0] in ["-h", "--help"]:
	 			self.dispUsage()
	 			sys.exit(0)
	 		elif opt[0] in ["-V", "--version"]:
	 			self.dispVersion()
	 			sys.exit(0)
	
	def __ping(self):
		return self.__processCmd([["ping"]], False)
	
	def __processCmd(self, cmd, showRet = True):
		beautifier = Beautifier()
		for c in cmd:
			beautifier.setInputCmd(c)
			try:
				client = CSocket(self.__conf["socket"])
				ret = client.send(c)
				if ret[0] == 0:
					logSys.debug("OK : " + `ret[1]`)
					if showRet:
						print beautifier.beautify(ret[1])
				else:
					logSys.debug("NOK: " + `ret[1].args`)
					print beautifier.beautifyError(ret[1])
					return False
			except socket.error:
				if showRet:
					logSys.error("Unable to contact server. Is it running?")
				return False
			except Exception, e:
				if showRet:
					logSys.error(e)
				return False
		return True
		
	##
	# Process a command line.
	#
	# Process one command line and exit.
	# @param cmd the command line

	def __processCommand(self, cmd):
		if len(cmd) == 1 and cmd[0] == "start":
			if self.__ping():
				logSys.error("Server already running")
				return False
			else:
				# Read the config
				ret = self.__readConfig()
				# Do not continue if configuration is not 100% valid
				if not ret:
					return False
				# Start the server
				self.__startServerAsync(self.__conf["socket"],
										self.__conf["force"])
				try:
					# Wait for the server to start
					self.__waitOnServer()
					# Configure the server
					self.__processCmd(self.__stream, False)
					return True
				except ServerExecutionException:
					logSys.error("Could not start server. Maybe an old " +
								 "socket file is still present. Try to " +
								 "remove " + self.__conf["socket"] + ". If " +
								 "you used fail2ban-client to start the " +
								 "server, adding the -x option will do it")
					return False
		elif len(cmd) == 1 and cmd[0] == "reload":
			if self.__ping():
				ret = self.__readConfig()
				# Do not continue if configuration is not 100% valid
				if not ret:
					return False
				self.__processCmd([['stop', 'all']], False)
				# Configure the server
				return self.__processCmd(self.__stream, False)
			else:
				logSys.error("Could not find server")
				return False
		elif len(cmd) == 2 and cmd[0] == "reload":
			if self.__ping():
				jail = cmd[1]
				ret = self.__readJailConfig(jail)
				# Do not continue if configuration is not 100% valid
				if not ret:
					return False
				self.__processCmd([['stop', jail]], False)
				# Configure the server
				return self.__processCmd(self.__stream, False)
			else:
				logSys.error("Could not find server")
				return False
		else:
			return self.__processCmd([cmd])
	
	
	##
	# Start Fail2Ban server.
	#
	# Start the Fail2ban server in daemon mode.
	
	def __startServerAsync(self, socket, force = False):
		# Forks the current process.
		pid = os.fork()
		if pid == 0:
			args = list()
			args.append(self.SERVER)
			# Start in background mode.
			args.append("-b")
			# Set the socket path.
			args.append("-s")
			args.append(socket)
			# Force the execution if needed.
			if force:
				args.append("-x")
			try:
				# Use the current directory.
				exe = os.path.abspath(os.path.join(sys.path[0], self.SERVER))
				os.execv(exe, args)
			except OSError:
				try:
					# Use the PATH env.
					os.execvp(self.SERVER, args)
				except OSError:
					print "Could not find %s" % self.SERVER
					os.exit(-1)
						
			
	def __waitOnServer(self):
		# Wait for the server to start
		cnt = 0
		if self.__conf["verbose"] > 1:
			pos = 0
			delta = 1
			mask = "[          ]"
		while not self.__ping():
			# Wonderful visual :)
			if self.__conf["verbose"] > 1:
				pos += delta
				sys.stdout.write("\rINFO   " + mask[:pos] + '#' + mask[pos+1:] +
								 " Waiting on the server...")
				sys.stdout.flush()
				if pos > len(mask)-3:
					delta = -1
				elif pos < 2:
					delta = 1
			# The server has 30 secondes to start.
			if cnt >= 300:
				if self.__conf["verbose"] > 1:
					sys.stdout.write('\n')
				raise ServerExecutionException("Failed to start server")
			time.sleep(0.1)
			cnt += 1
		if self.__conf["verbose"] > 1:
			sys.stdout.write('\n')
			
	
	def start(self, argv):
		# Command line options
		self.__argv = argv
		
		# Install signal handlers
		signal.signal(signal.SIGTERM, self.__sigTERMhandler)
		signal.signal(signal.SIGINT, self.__sigTERMhandler)
		
		# Reads the command line options.
		try:
			cmdOpts = 'hc:s:xdviqV'
			cmdLongOpts = ['help', 'version']
			optList, args = getopt.getopt(self.__argv[1:], cmdOpts, cmdLongOpts)
		except getopt.GetoptError:
			self.dispUsage()
			return False
			
		self.__getCmdLineOptions(optList)
		
		verbose = self.__conf["verbose"]
		if verbose <= 0:
			logSys.setLevel(logging.ERROR)
		elif verbose == 1:
			logSys.setLevel(logging.WARN)
		elif verbose == 2:
			logSys.setLevel(logging.INFO)
		else:
			logSys.setLevel(logging.DEBUG)
		# Add the default logging handler
		stdout = logging.StreamHandler(sys.stdout)
		# set a format which is simpler for console use
		formatter = logging.Formatter('%(levelname)-6s %(message)s')
		# tell the handler to use this format
		stdout.setFormatter(formatter)
		logSys.addHandler(stdout)

		# Set the configuration path
		self.__configurator.setBaseDir(self.__conf["conf"])
		
		# Set socket path
		self.__configurator.readEarly()
		socket = self.__configurator.getEarlyOptions()
		if self.__conf["socket"] == None:
			self.__conf["socket"] = socket["socket"]
		logSys.info("Using socket file " + self.__conf["socket"])

		if self.__conf["dump"]:
			ret = self.__readConfig()
			self.dumpConfig(self.__stream)
			return ret
		
		# Interactive mode
		if self.__conf["interactive"]:
			try:
				import readline
			except ImportError:
				logSys.error("Readline not available")
				return False
			try:
				ret = True
				if len(args) > 0:
					ret = self.__processCommand(args)
				if ret:
					readline.parse_and_bind("tab: complete")
					self.dispInteractive()
					while True:
						cmd = raw_input(self.PROMPT)
						if cmd == "exit" or cmd == "quit":
							# Exit
							return True
						if not cmd == "":
							self.__processCommand(shlex.split(cmd))
			except (EOFError, KeyboardInterrupt):
				print
				return True
		# Single command mode
		else:
			if len(args) < 1:
				self.dispUsage()
				return False
			return self.__processCommand(args)

	def __readConfig(self):
		# Read the configuration
		self.__configurator.readAll()
		ret = self.__configurator.getOptions()
		self.__configurator.convertToProtocol()
		self.__stream = self.__configurator.getConfigStream()
		return ret
	
	def __readJailConfig(self, jail):
		self.__configurator.readAll()
		ret = self.__configurator.getOptions(jail)
		self.__configurator.convertToProtocol()
		self.__stream = self.__configurator.getConfigStream()
		return ret
	
	#@staticmethod
	def dumpConfig(cmd):
		for c in cmd:
			print c
		return True
	dumpConfig = staticmethod(dumpConfig)


class ServerExecutionException(Exception):
	pass

if __name__ == "__main__":
	client = Fail2banClient()
	# Exit with correct return value
	if client.start(sys.argv):
		sys.exit(0)
	else:
		sys.exit(-1)