[tor-relays] Bridge Operators - Heartbleed, Heartwarming, and Increased Help
yawning at schwanenlied.me
Sat Apr 26 18:53:42 UTC 2014
On Sat, 26 Apr 2014 06:05:27 +0000
Yawning Angel <yawning at schwanenlied.me> wrote:
> I'll look into adding backward compatibility code for the version of
> pycrypto CentOS packages so it's possible to setup one of these
> without pulling in all the development tools next (Git is temporary
> till the next obfsproxy release, since the #11558 changes are
> needed). Follow the bug for future progress.
Ok, I just closed the bug as "invalid", with no planned further
action on my part with regards to this.
Summary of current state of obfsproxy on CentOS 6:
It works with the vendor provided packages (Including python 2.6), as
long as you install a more recent version of pycrypto.
The vendor provided pycrypto (python-crypto-2.0.1-22) is not usable
because it is missing `Crypto.Util.Counter` *and* more importantly,
the CTR-AES implementation only handles plaintexts/ciphertexts that
are sized as a multiple of the AES block size.
Any version of pycrypto that has a fully working CTR-AES
implementation will also provide `Crypto.Util.Counter`, so there is
no need to implement the latter in obfsproxy as a compatibility hack.
Till the next release of obfsproxy, people that wish to use this will
need to grab obfsproxy from the git repository to get a fix for
How one will properly update pycrypto is left as an exercise to someone
that actually uses CentOS.
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