# PYTHON MD5

針對檔案做hash

import hashlib

a='source.docx'

def hashfile(filename):
    with open(filename, "rb") as f:
        buf = f.read()
    m = hashlib.md5(buf)
    return m.hexdigest()

print('md5 hash: ' + hashfile(a))

針對資料夾做hash

import hashlib
from pathlib import Path

def md5_update_from_file(filename, hash):
    assert Path(filename).is_file()
    with open(str(filename), "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash.update(chunk)
    return hash


def md5_file(filename):
    return md5_update_from_file(filename, hashlib.md5()).hexdigest()


def md5_update_from_dir(directory, hash):
    assert Path(directory).is_dir()
    for path in sorted(Path(directory).iterdir()):
        hash.update(path.name.encode())
        if path.is_file():
            hash = md5_update_from_file(path, hash)
        elif path.is_dir():
            hash = md5_update_from_dir(path, hash)
    return hash


def md5_dir(directory):
    return md5_update_from_dir(directory, hashlib.md5()).hexdigest()


md5_hash = md5_dir("C:/test/")

print(md5_hash)

###### tags: `python` `MD5` `hash` `加密`