summaryrefslogtreecommitdiff
path: root/obfs4proxy/pt_extras.go
diff options
context:
space:
mode:
authorYawning Angel <yawning@schwanenlied.me>2014-06-02 17:50:01 +0000
committerYawning Angel <yawning@schwanenlied.me>2014-06-02 17:50:01 +0000
commit5bdc376e2abaf5ac87816b763f5b26e314ee9536 (patch)
tree8746291873e187d7783116a2c9758bab23da5eb1 /obfs4proxy/pt_extras.go
parent5cb3369e200c72aa23c3f86816cb854c35cc95cb (diff)
Change how the length obfsucation mask is derived.
Instead of using the nonce for the secret box, just use SipHash-2-4 in OFB mode instead. The IV is generated as part of the KDF. This simplifies the code a decent amount and also is better on the off chance that SipHash-2-4 does not avalanche as well as it is currently assumed. While here, also decouple the fact that *this implementation* of obfs4 uses a PRNG with 24 bytes of internal state for protocol polymorphism instead of 32 bytes (that the spec requires). THIS CHANGE BREAKS WIRE PROTCOL COMPATIBILITY.
Diffstat (limited to 'obfs4proxy/pt_extras.go')
0 files changed, 0 insertions, 0 deletions