checksums.py

import hashlib

# Python implementation of linux sum (BSD 16-bit Checksum) commandline tool.

"""
Unused script with checksum implementations in Python
"""

def bsdchecksum(infile):
    with open(infile, 'rb') as f:
        file_bytes = f.read()
        c_sum = 0
        for char in file_bytes:
            c_sum = (c_sum >> 1) + ((c_sum & 1) << 15)
            c_sum += char
            c_sum &= 0xffff
    return c_sum


def md5_checksum(infile):
    with open(infile, 'rb') as f:
        file_bytes = f.read()
        return hashlib.md5(file_bytes).hexdigest()