Straight AES encrypt/decrypt

user.rb

def encrypt_bugdb_password
  if !(self.bugdb_password_changed? or self.new_record?)
    return
  end
  cipher = OpenSSL::Cipher::Cipher.new CipherHelper::encryption_type
  cipher.encrypt
  cipher.key = Digest::SHA1.hexdigest CipherHelper::key
  cipher.iv = self.initialization_vector = cipher.random_iv
  encrypted_password = cipher.update self.bugdb_password
  encrypted_password << cipher.final
  self.bugdb_password = encrypted_password
end

def decrypt_bugdb_password
  cipher = OpenSSL::Cipher::Cipher.new CipherHelper::encryption_type
  cipher.decrypt
  cipher.key = Digest::SHA1.hexdigest CipherHelper::key
  cipher.iv = self.initialization_vector
  decrypted_password = cipher.update self.bugdb_password
  decrypted_password << cipher.final
end