Hello all,
Due to a moment of surprising productivity, I have a release candidate
of obfsclient available now. For those of you that missed the last
thread regarding this, it is a C++11 client implementation of
obfs2, obfs3, and ScrambleSuit that works as a drop in replacement for
obfsproxy.
Notable changes since the last time I posted:
* ScrambleSuit code is now up to spec.
* Packet length and Inter-packet Arrival Times are randomized.
* Session Ticket Handshake is supported.
* obfsclient will give up on handshaking after 60 seconds.
* Needed because obfsproxy servers do not close the connection for
certain protocols.
* SIGINT is hooked and handled per the pt spec.
* Some dumb bugs were fixed.
Places where obfsclient behaves differently from obfsproxy:
* Current production obfsproxy releases disable Scramblesuit IAT
obfuscation. obfsclient also uses slightly different logic for
sending with it enabled. (May change for final release)
* WELL512 is used instead of MT for the ScrambleSuit packet length
obfuscation.
* obfsclient gives up when the handshaking stalls.
* The SOCKS5 response is sent post obfuscation protocol handshake
instead of before.
* obfsclient uses SOCKS5 instead of SOCKS4.
* The ScrambleSuit Session Ticket store is a plain text file.
Things that are not bugs:
* ScrambleSuit requires the client side tor to be 0.2.5.x.
* The code will not build if the compiler is from the stone age.
To what I assume will be a sigh of relief from Fabian, I tested on
FreeBSD as well this time. The systems used for testing are in the
release notes.
Where: https://github.com/Yawning/obfsclient/releases/tag/v0.0.1-rc1
Thanks in advance,
--
Yawning Angel
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