'Signing the same message twice should return the same signatures.'

def test_multiple_signings(self):

    message = struct.pack('>IIII', 0, 0, 0, 1)
    signature1 = pkcs1.sign(message, self.priv, 'SHA-1')
    signature2 = pkcs1.sign(message, self.priv, 'SHA-1')
    self.assertEqual(signature1, signature2)
