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[tor-bugs] #11143 [Obfsproxy]: Error when starting Obfsproxy with Scramblesuit on Raspbian



#11143: Error when starting Obfsproxy with Scramblesuit on Raspbian
--------------------------+------------------------------------
 Reporter:  fishbones     |          Owner:  asn
     Type:  defect        |         Status:  new
 Priority:  normal        |      Milestone:
Component:  Obfsproxy     |        Version:  Tor: 0.2.5.1-alpha
 Keywords:  scramblesuit  |  Actual Points:
Parent ID:                |         Points:
--------------------------+------------------------------------
 Hello,

 I'm running an obfuscated bridge relay on a Raspberry Pi. I have tried to
 update obfsproxy to run scramblesuit, as requested on the blog, but I am
 running into a startup error. I have the latest Tor (compiled from
 source), and the latest obfsproxy. I have manually specified a password
 rather than have the system allocate one.

 Everything is up to date.

 Relevant info:

 pi@raspberrypi ~/.tor $ uname -a
 Linux raspberrypi 3.10.25+ #622 PREEMPT Fri Jan 3 18:41:00 GMT 2014
 armv6l GNU/Linux

 pi@raspberrypi ~/.tor $ tor --version
 Tor version 0.2.5.2-alpha (git-745434d29a92da68).

 pi@raspberrypi ~/.tor $ obfsproxy --version
 0.2.6

 pi@raspberrypi ~ $ python --version
 Python 2.7.3

 A sudo pip install obfsproxy --upgrade command will only update
 setuptools to 2.2, but obfsproxy stays the same.

 Obfsproxy logfile:

 2014-02-18 19:08:54,757 [WARNING] Obfsproxy (version: 0.2.6) starting
 up.
 2014-02-18 19:08:54,770 [DEBUG] argv: ['/usr/local/bin/obfsproxy',
 '--log-min-severity=debug', '--log-file=/home/pi/obfs.log', 'managed']
 2014-02-18 19:08:54,772 [DEBUG] args: Namespace(data_dir=None,
 log_file='/home/pi/obfs.log', log_min_severity='debug',
 name='managed',
 no_log=False, no_safe_logging=False)
 2014-02-18 19:08:54,774 [INFO] Entering server managed-mode.
 2014-02-18 19:08:54,896 [DEBUG] pyptlib gave us the following data:
 '{'__class__': <class 'pyptlib.server.ServerTransportPlugin'>,
 'config': {'ORPort': ('127.0.0.1', XXXXX),
 'allTransportsEnabled': False,
 'authCookieFile':
 '/home/pi/.tor/extended_orport_auth_cookie',
 'extendedORPort': ('127.0.0.1', XXXXX),
 'managedTransportVer': ['1'],
 'serverBindAddr': {'obfs3': ('0.0.0.0', XXXXX),
 'scramblesuit': ('0.0.0.0', XXXXX)},
 'serverTransportOptions': {'scramblesuit': {'password':
 'XXXXXXXXXXXXXXXXX'}},
 'stateLocation': '/home/pi/.tor/pt_state/',
 'transports': ['obfs3', 'scramblesuit']},
 'served_transports': ['obfs3', 'scramblesuit'],
 'served_version': '1',
 'stdout': <open file '<stdout>', mode 'w' at 0xb6cbe078>}'
 2014-02-18 19:08:54,927 [INFO] ExtORPortServerFactory starting on
 XXXXX
 2014-02-18 19:08:54,950 [INFO] Starting factory
 <obfsproxy.network.extended_orport.ExtORPortServerFactory instance at
 0x1e156c0>
 2014-02-18 19:08:54,952 [DEBUG] fact_ext_s_0x1e156c0: Starting up
 Extended ORPort server factory.
 2014-02-18 19:08:54,954 [DEBUG] Successfully launched 'obfs3' at
 '[scrubbed]'
 2014-02-18 19:08:54,957 [DEBUG] Setting the state location to
 `/home/pi/.tor/pt_state/scramblesuit/'.
 2014-02-18 19:08:54,969 [ERROR] Incorrect padding
 Traceback (most recent call last):
 File
 "/usr/local/lib/python2.7/dist-packages/obfsproxy/pyobfsproxy.py",
 line
 168, in run
 pyobfsproxy()
 File
 "/usr/local/lib/python2.7/dist-packages/obfsproxy/pyobfsproxy.py",
 line
 140, in pyobfsproxy
 do_managed_mode()
 File
 "/usr/local/lib/python2.7/dist-packages/obfsproxy/pyobfsproxy.py",
 line
 72, in do_managed_mode
 managed_server.do_managed_server()
 File
 "/usr/local/lib/python2.7/dist-packages/obfsproxy/managed/server.py",
 line 55, in do_managed_server
 transport_class.setup(pt_config)
 File
 "/usr/local/lib/python2.7/dist-
 packages/obfsproxy/transports/scramblesuit/scramblesuit.py",
 line 121, in setup
 cfg["password"]))
 File "/usr/lib/python2.7/base64.py", line 198, in b32decode
 raise TypeError('Incorrect padding')
 TypeError: Incorrect padding

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11143>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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