crc32.py

"""
Reference:

    http://depa.usst.edu.cn/chenjq/www2/SDesign/JavaScript/CRCcalculation.htm

Input:

    CRC Order: 32
    CRC Polynom: 4C11DB7
    Data Input:
        Type: Hex
        Value: 0403020108070605

Result:

    CRC (hex): CA10A083

Install crcmod module first:

    pip install crcmod

"""

import crcmod
import binascii


# Create function
func = crcmod.mkCrcFun(poly=0x104C11DB7, initCrc=0, rev=False, xorOut=0x0)

# Get input
raw = '\x04\x03\x02\x01\x08\x07\x06\x05'
print([raw])
print([binascii.hexlify(raw)])

# Calculate CRC
crc_result = func(raw)
print(hex(crc_result))

# Is match ?
crc_check = 0xca10a083
if crc_check == crc_result:
    print('CRC match.')
else:
    print('CRC mismatch.')