'Test that _getKey generates the correct keys.'

def test_getKey(self):

    self.proto.kexAlg = self.kexAlgorithm
    self.proto.sessionID = 'EF'
    k1 = self.hashProcessor(((('AB' + 'CD') + 'K') + self.proto.sessionID)).digest()
    k2 = self.hashProcessor(('ABCD' + k1)).digest()
    self.assertEqual(self.proto._getKey('K', 'AB', 'CD'), (k1 + k2))
