def test_mul(self):
'''Tests the __mul method
test cases taken from FIPS 197 section 4.2.1'''
self.assertEqual(AES._AES__mul(0x57, 0x13), 0xfe) # @UndefinedVariable
self.assertEqual(AES._AES__mul(0x13, 0x57), 0xfe) # @UndefinedVariable
self.assertEqual(AES._AES__mul(0x57, 0x83), 0xc1) # @UndefinedVariable
self.assertEqual(AES._AES__mul(0x83, 0x57), 0xc1) # @UndefinedVariable
