hash.py

#!/usr/bin/env python3

import hashlib, sys
from hashlib import md5

def hash_with_all_guaranteed_algoritms(msg: bytes):
    """hash functions guaranteed to be available for all platforms"""
    for algo in sorted(hashlib.algorithms_guaranteed):
        try:
            h = hashlib.new(algo)
            h.update(msg)
            print("{:10} {}".format(algo, h.hexdigest()))
        except Exception as e:
            print("{} error: {}".format(algo, e), file=sys.stderr)

def md5_collision(msg1: bytearray, msg2: bytearray) -> bool:
    if msg1 == msg2:
        return False
    if md5(msg1).digest() == md5(msg2).digest():
        return True
    return False

if __name__ == "__main__":
    msg = b'hello'
    hash_with_all_guaranteed_algoritms(msg)

    msg1 = bytearray.fromhex('d131dd02c5e6eec4693d9a0698aff95c2fcab58712467eab4004583eb8fb7f8955ad340609f4b30283e488832571415a085125e8f7cdc99fd91dbdf280373c5bd8823e3156348f5bae6dacd436c919c6dd53e2b487da03fd02396306d248cda0e99f33420f577ee8ce54b67080a80d1ec69821bcb6a8839396f9652b6ff72a70')
    msg2 = bytearray.fromhex('d131dd02c5e6eec4693d9a0698aff95c2fcab50712467eab4004583eb8fb7f8955ad340609f4b30283e4888325f1415a085125e8f7cdc99fd91dbd7280373c5bd8823e3156348f5bae6dacd436c919c6dd53e23487da03fd02396306d248cda0e99f33420f577ee8ce54b67080280d1ec69821bcb6a8839396f965ab6ff72a70')
    if md5_collision(msg1, msg2):
        print("MD5 collision!")