def test_second(self):
""" Test CRC16 residual calculation """
buffer, crc = self.test_first()
# Append 1st complement for a "self-verifying" block -
# from example in Yubikey low level interface
crc_inv = 0xffff - crc
buffer += struct.pack('<H', crc_inv)
crc2 = crc16(buffer)
self.assertEqual(crc2, CRC_OK_RESIDUAL)
def test_second(self):
""" Test CRC16 residual calculation """
buffer,crc = self.test_first()
# Append 1st complement for a "self-verifying" block -
# from example in Yubikey low level interface
crc_inv = 0xffff - crc
buffer += struct.pack('<H', crc_inv)
crc2 = crc16(buffer)
self.assertEqual(crc2, CRC_OK_RESIDUAL)
def checksum(data):
return 0xffff - crc16(data)
def test_first(self):
""" Test CRC16 trivial case """
buffer = '\x01\x02\x03\x04'
crc = crc16(buffer)
self.assertEqual(crc, 0xc66e)
return buffer, crc
def test_first(self):
""" Test CRC16 trivial case """
buffer = b'\x01\x02\x03\x04'
crc = crc16(buffer)
self.assertEqual(crc, 0xc66e)
return buffer,crc
