prf.rb is a simple generator script for TLS1.2 pseudo-random
function test
vectors.
Usage: ./prf.rb ...
-k, --key=KEY secret key
-r, --generate-random=NUMBER number of bytes for generated random seed (do not use in conjunction with -s
-s, --seed=SEED random seed
-l, --length=NUMBER output length
-h, --hash=NAME Name of hash function to use. The function must be supported by OpenSSL. Default is sha256.