gibberish-aes-ruby

Written by Alex Boussinet mailto:alex.boussinet@gmail.com
Modified by Mark Percival mailto:mark@mpercival.com

This ruby gem is simply a modification of Alex Boussinet's Ruby-AES(normal implemenation) which can be found at http://raa.ruby-lang.org/project/ruby-aes/

I've fixed 2 issues to make it compatible with OpenSSL:

• Correctly padding the blocks
• Generating a key and IV from a password and random salt

require 'rubygems'
require 'ruby-aes'
require 'base64'

enc = Aes.openssl_encrypt("pass", "test", :salt => "1831BD4EC8E35CC8", :size => 256, :mode => 'CBC')
p Base64.b64encode(enc[:salted])
dec = Aes.openssl_decrypt("pass", enc[:salted])
p dec

Valid modes are:

• ECB (Electronic Code Book)
• CBC (Cipher Block Chaining)
• OFB (Output Feedback)
• CFB (Cipher Feedback)

Valid key length:

• 128 bits
• 192 bits
• 256 bits

For a really good encryption, 256 bits CBC is recommanded.

For more information on AES-Rijndael, see: http://csrc.nist.gov/encryption/aes/rijndael/