pure ruby blowfish

blowfishpr.rb is a pure ruby implementation of Blowfish crypt algorithm. Advantage is run anywhere without complicated installation. Disadvantage is speed. Especially, key initialization and weak key checking is really slow (e.g. 250ms and 350ms respectively on my Pentium-M laptop).

Therefore I implepented key save/load API to use pre-computed key vectors. With key pre-computation, encryption and decryption speed is somewhat reasonable for usual web applications.

This library is not documented, so if you have any questions, feel free to write some comment here.

もりきゅうさん作成のbf.rbを改良して、blowfishpr.rbを作りました。 Blowfish暗号アルゴリズムによって文字列の暗号化が行えます。遅いので、鍵を最初に計算しておく機構をつくりました。あらかじめ計算しておけば、それなりに使えるとおもいます。では。