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authorYawning Angel <yawning@schwanenlied.me>2014-05-22 18:42:16 +0000
committerYawning Angel <yawning@schwanenlied.me>2014-05-22 18:42:16 +0000
commitfd4e3c7c74ad4d1acb37c43fde8d18786616846a (patch)
tree7430e55ef826ed13a934df0a6d361711cc8308da /weighted_dist.go
parent7dd875fe4cd214a7678e701adfd2a8bde7882e4d (diff)
Add replay detection to handshakes.
This is done by maintaining a map keyed off the SipHash-2-4 digest of the MAC_C component of the handshake. Collisions, while possible are unlikely in the extreme and are thus treated as replays. In concept this is fairly similar to the ScrambleSuit `replay.py` code, with a few modifications: * There is a upper bound on how large the replay filter can grow. Currently this is set to 102400 entries, though it is unlikely that this limit will be hit. * A doubly linked list is also maintained parallel to the map, so the filter compaction process does not need to iterate over the entire filter.
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