Re: [tor-talk] Orbot v14 alpha: obfsclient, Tor 0.2.5.3-alpha

[Nathan Freitas <nathan@xxxxxxxxxxx>]

On May 3, 2014 4:18:28 PM EDT, George Kadianakis <desnacked@xxxxxxxxxx> wrote:
>George Kadianakis <desnacked@xxxxxxxxxx> writes:
>
>> Nathan Freitas <nathan@xxxxxxxxxxx> writes:
>>
>>> On May 3, 2014 6:10:58 AM EDT, George Kadianakis
><desnacked@xxxxxxxxxx> wrote:
>>>>Nathan Freitas <nathan@xxxxxxxxxxx> writes:
>>>>
>>>>> Orbot now supports Obfs3 and Scramblesuit, thanks to Yawning's
>help.
>>>>>
>>>>
>>>>Great news! Thanks!
>>>>
>>>>BTW, how are obfs3 bridges supposed to be used?
>>>
>>> This is the string I use for scramblesuit, copied directly from the
>bridges.tp.o page:
>>>
>>> scramblesuit xxx.xxx.xxx.xxx:xxxxx fingerprintxxx
>password=sharedsecretxxx
>>>
>>>>I installed Orbot-v14.0.0-ALPHA-2a.apk and checked the Preferences
>>>>menu. There used to be an option called 'Obfuscated Bridges' that
>it's
>>>>not there anymore. I assumed that I just have to specify a bridge,
>and
>>>>then prefix it with the transport name, like you do in the torrc.
>>>
>>> Yes.
>>>
>>>>
>>>>So I clicked on 'Bridges' and then inserted 'obfs3 <ip>:<port>'
>(with
>>>>my own <ip> and <port>) and started up Orbot. Unfortunately, I think
>>>>that it didn't work very well. In the logs I got:
>>>>""""
>>>>Adding bridge: obfs3 <ip>:<port>
>>>
>>> Hmm.... Add a fingerprint perhaps?
>>>
>>
>> Hm, I just tried that bridge again (without adding a fingerprint),
>and
>> now I'm getting the usual PT error:
>> "We were supposed to connect to bridge '<ip>:<port>' using pluggable
>> transport 'obfs3', but we can't find a pluggable transport proxy
>> supporting 'obfs2'. ..."
>>
>> I'm not sure why I'm getting this today instead of the error I was
>> getting yesterday [0]. I don't remember rebooting or changing
>> anything.
>>
>> In any case, this new message usually means that obfsproxy crashed
>> early: before being configured to be a Pluggable Transport. The same
>> should be true for obfsclient too. Could it be a permission issue?
>>
>
>We played a bit with Yawning on this.
>
>Are we sure that the ClientTransportPlugin is even set at all?
>
>Because looking at
>https://gitweb.torproject.org/orbot.git/blob/HEAD:/src/org/torproject/android/service/TorService.java#l1713
>it seems that it depends on the boolean PREF_BRIDGES_OBFUSCATED which
>apparently is never set since commit 147b57af4.
>
>This seems to agree with my experience since I'm getting the log
>message "Using standard bridges" which is on the 'else' codepath.
>
>Or maybe we are missing something.

Wow, I just realized that I removed that preference UI, but on my test device it was already set to TRUE, since I did not do a clean install.

Thanks for the testing, and will push a new release our in next 24 hours with that fixed.

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