Commit Graph

4 Commits (f1b1dcdb106c00fef1acffe04caaeabb3a34239b)

Author SHA1 Message Date
Yawning Angel f1b1dcdb10 Change hashDrbg to take a drbgSeed for initialization.
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).
11 years ago
Yawning Angel 64212e1029 Add vim modelines to some files (No functional changes). 11 years ago
Yawning Angel 7a7b2af516 Fix e-mail address in the copyright notice. 11 years ago
Yawning Angel 9bfdd77f72 Add preliminary support for packet length obfuscation.
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.
11 years ago