RE: Rinjdael (AES) encryption in Ruby

You are using the wrong key length.

test_aes_encryption is defining a 256 bit key but using a 128
test_openssl_encryption is defining and using a 256 bit key
test_crypt_encryption isn't even setting an IV.

(But I'm not a ruby dev, nor a Crypto Guru)

--http://compgroups.net/comp.lang.ruby/rinjdael-aes-encryption-in-ruby/755780