Package csrand implements the math/rand interface over crypto/rand, along with some utility functions for common random number/byte related tasks.

Package drbg implements a minimalistic DRBG based off SipHash-2-4 in OFB mode.

Package log implements a simple set of leveled logging wrappers around the standard log package.

Package ntor implements the Tor Project's ntor handshake as defined in proposal 216 "Improved circuit-creation key exchange".

Package probdist implements a weighted probability distribution suitable for protocol parameterization.

Package replayfilter implements a generic replay detection filter with a caller specifiable time-to-live.

Package socks5 implements a SOCKS 5 server and the required pluggable transport specific extensions.

Package uniformdh implements the Tor Project's UniformDH key exchange mechanism as defined in the obfs3 protocol specification.