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2014-08-27Various IAT related changes.Yawning Angel
* Unbreak inbound TYPE_PRNG_SEED processing. * IAT obfuscation is now a per-bridge argument (iat-mode). * 0 (default) = Disabled. * 1 = Enabled, ScrambleSuit-style with bulk throughput optimizations. * 2 = Paranoid, Each IAT write will send a length sampled from the length distribution. (EXPENSIVE). The "iat-mode" argument is mandatory on the Bridge lines, and as a ServerTransportOption. Old statefiles will continue to load and use the default value, edit it if your hat is made of tin foil.
2014-08-27Display a more useful error on JSON Unmarshall failure.Yawning Angel
2014-08-23Change all the arguments to use base16 from base64.Yawning Angel
WARNING: THIS BREAKS BACKWARD COMPATIBILITY. This is primarily to work around bug #12930. Base16 was chosen over unpadded Base64 because the go runtime Base64 decoder does not handle omitting the padding. May $deity have mercy on anyone who needs to hand-enter an obfs4 bridge line because I will not.
2014-08-18Change the drbg seed field in the state file.Yawning Angel
Changing from "drbgSeed" to "drbg-seed" to be consistent with the ServerTransportOptions to allow for easier copy/paste.
2014-08-18Add support for enabling IAT obfuscation and biased WDist.Yawning Angel
Golang's command line parser is slightly cumbersome to use with subcommands, so the arguments are "obfs4-iatObufscation" and "obfs-distBias" instead of obfsproxy style subcommands.
2014-08-17Massive cleanup/code reorg.Yawning Angel
* Changed obfs4proxy to be more like obfsproxy in terms of design, including being an easy framework for developing new TCP/IP style pluggable transports. * Added support for also acting as an obfs2/obfs3 client or bridge as a transition measure (and because the code itself is trivial). * Massively cleaned up the obfs4 and related code to be easier to read, and more idiomatic Go-like in style. * To ease deployment, obfs4proxy will now autogenerate the node-id, curve25519 keypair, and drbg seed if none are specified, and save them to a JSON file in the pt_state directory (Fixes Tor bug #12605).