K_PRIM = bytes.fromhex('67556B58703273357638792F423F4528')
IV = bytes.fromhex('4D6251655468576D5A7134743777397A')

CODE_ECB = b"ECB"
CODE_CFB = b"CFB"
CODE_OK = b"Ok!"
CODE_INVALID = b"Invalid request"
CODE_START_COMM = b"Start!"
