require 'abstract_unit' require 'active_support/time' class MessageEncryptorTest < Test::Unit::TestCase def setup @encryptor = ActiveSupport::MessageEncryptor.new(ActiveSupport::SecureRandom.hex(64)) @data = { :some => "data", :now => Time.local(2010) } end def test_simple_round_tripping message = @encryptor.encrypt(@data) assert_equal @data, @encryptor.decrypt(message) end def test_encrypting_twice_yields_differing_cipher_text first_messqage = @encryptor.encrypt(@data) second_message = @encryptor.encrypt(@data) assert_not_equal first_messqage, second_message end def test_messing_with_either_value_causes_failure text, iv = @encryptor.encrypt(@data).split("--") assert_not_decrypted([iv, text] * "--") assert_not_decrypted([text, munge(iv)] * "--") assert_not_decrypted([munge(text), iv] * "--") assert_not_decrypted([munge(text), munge(iv)] * "--") end def test_signed_round_tripping message = @encryptor.encrypt_and_sign(@data) assert_equal @data, @encryptor.decrypt_and_verify(message) end private def assert_not_decrypted(value) assert_raise(ActiveSupport::MessageEncryptor::InvalidMessage) do @encryptor.decrypt(value) end end def munge(base64_string) bits = ActiveSupport::Base64.decode64(base64_string) bits.reverse! ActiveSupport::Base64.encode64s(bits) end end