cryptor.rb

#just make sure that you have the appropriate openssl gem required.
#inspiration: http://blog.agoragames.com/blog/2010/05/13/rubyreversibleencryption/

class Cryptor
    self.encryption_type = "aes-256-cbc"
    def self.encrypt(plaintext, key)
      cipher = OpenSSL::Cipher::Cipher.new(self.encryption_type)
      cipher.encrypt
      cipher.key = key
      cipher.iv = iv = cipher.random_iv
      encrypted = cipher.update(plaintext) + cipher.final
      encrypted = iv + encrypted
      encrypted = Base64.encode64(encrypted)
      encrypted
    end
    def self.decrypt(encrypted, key)
      cipher = OpenSSL::Cipher::Cipher.new(self.encryption_type)
      cipher.decrypt
      cipher.key = key
      encrypted = Base64.decode64(encrypted)
      cipher.iv = encrypted.slice!(0,cipher.iv_len)
      decrypted = cipher.update(encrypted) + cipher.final
    end
end