ucrc

Python module for calculating CRC check with result as unsigned.

Installation

$ pip install ucrc

Usage

Example to calculate CRC32 of data block with standard algorithm options:

from ucrc import crc32

data_block = bytes('Hello World'.encode('utf-8'))
crc_value = crc32(data_block)

For algorithm customization:

from ucrc import crc32

data_block = bytes('Hello World'.encode('utf-8'))
crc_value = crc32(data_block, poly= 0x12FF00CE, in_ref=True, out_ref=True)

For predefined algorithm:

from ucrc import crc32_posix

data_block = bytes([0xAA, 0xBB, 0xCC])
crc_value = crc32(data_block)

Algorithm customization

For all not pre-defined algorithms following options available:

• poly - The polynomial, that is used during checksum calculation

• init_val - The initial value of checksum

• final_xor - The value that is xored to checksum right before it will be returned

• in_ref - Boolean, if true the input bits will be flipped

• out_ref - Boolean, if true the return value will be flipped

Predefined algorithms: