| Age | Commit message (Collapse) | Author |
|---|
|
The old way was biasted towards the earlier values. Thanks to asn for
pointing this out and suggesting an alternative.
As an additional tweak, do not reuse the drbg seed when calculating the
IAT distribution, but instead run the seed through SHA256 first, for
extra tinfoil goodness.
|
|
When enabled, inter-packet delay will be randomized between 0 and 10
ms in 100 usec intervals. As experiences from ScrambleSuit (and back
of the envelope math based on how networks work) show, this is
extremely expensive and artificially limits the throughput of the link.
When enabled, bulk transfer throughput will be limited to an average of
278 KiB/s.
|
|
This fixes #3, and brings the code to be on par with the delopyed
versions of ScrambleSuit in terms of features.
|
|
This also adds the drgb-seed option to the `-gen` obfs4proxy output.
|
|
This paves the way for having servers use the same seed for all
incoming connections, across multiple startup/shutdown cycles. As
opposed to the current situation where each Obfs4Listener will
randomly generate it's seed at creation time.
Additionally, use 256 bit seeds (128 bit SipHash-2-4 key + 16 bytes of
initial material).
|
|
|
|
In theory this is easier on the garbage collector. Probably could
reuse more of the intermediary buffers by stashing them in the
connection state, but that makes the code kind of messy. This should
be an improvement.
|
|
|
|
|
|
|
|
|
|
|
|
The same algorithm as ScrambleSuit is used, except:
* SipHash-2-4 in OFB mode is used to create the distribution.
* The system CSPRNG is used when sampling the distribution.
This fixes most of #3, all that remains is generating and sending a
persistent distribution on the server side to the client.
|
|
On second thought instead of using log.Panicf(), panic() and do the
logging with recover(). This somewhat centralizes logging in
obfs4proxy, which will be easier to change when I invariably decide to
do logging differently in the future.
|
|
|
|
This adds preliminary support for data padding by adding another layer
of encapsulation inside each AEAD frame containing a type and length.
For now, data is still sent unpadded, but the infrastructure for
supporting it is mostly there.
Additionally, use log.Panic[f]() instead of panic through out the code
so that some panics are logged.
|
