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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 = ::Base64.decode64(base64_string)
bits.reverse!
::Base64.strict_encode64(bits)
end
end
end
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