require 'abstract_unit' begin require 'openssl' OpenSSL::Digest::SHA1 rescue LoadError, NameError $stderr.puts "Skipping MessageEncryptor test: broken OpenSSL install" else require 'active_support/time' require 'active_support/json' class MessageEncryptorTest < ActiveSupport::TestCase class JSONSerializer def dump(value) ActiveSupport::JSON.encode(value) end def load(value) ActiveSupport::JSON.decode(value) end end def setup @secret = SecureRandom.hex(64) @verifier = ActiveSupport::MessageVerifier.new(@secret, :serializer => ActiveSupport::MessageEncryptor::NullSerializer) @encryptor = ActiveSupport::MessageEncryptor.new(@secret) @data = { :some => "data", :now => Time.local(2010) } end def test_encrypting_twice_yields_differing_cipher_text first_messqage = @encryptor.encrypt_and_sign(@data).split("--").first second_message = @encryptor.encrypt_and_sign(@data).split("--").first assert_not_equal first_messqage, second_message end def test_messing_with_either_encrypted_values_causes_failure text, iv = @verifier.verify(@encryptor.encrypt_and_sign(@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_messing_with_verified_values_causes_failures text, iv = @encryptor.encrypt_and_sign(@data).split("--") assert_not_verified([iv, text] * "--") assert_not_verified([text, munge(iv)] * "--") assert_not_verified([munge(text), iv] * "--") assert_not_verified([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 def test_alternative_serialization_method encryptor = ActiveSupport::MessageEncryptor.new(SecureRandom.hex(64), :serializer => JSONSerializer.new) message = encryptor.encrypt_and_sign({ :foo => 123, 'bar' => Time.utc(2010) }) assert_equal encryptor.decrypt_and_verify(message), { "foo" => 123, "bar" => "2010-01-01T00:00:00Z" } end private def assert_not_decrypted(value) assert_raise(ActiveSupport::MessageEncryptor::InvalidMessage) do @encryptor.decrypt_and_verify(@verifier.generate(value)) end end def assert_not_verified(value) assert_raise(ActiveSupport::MessageVerifier::InvalidSignature) do @encryptor.decrypt_and_verify(value) end end def munge(base64_string) bits = ActiveSupport::Base64.decode64(base64_string) bits.reverse! ActiveSupport::Base64.strict_encode64(bits) end end end