filenames-secure

filenames_secure

Obscure filenames of mp4 files - away from being embarrassed by accidently opening family videos at work!

Install with: pip install filenames_secure

Obscure filenames of mp4 files - away from being embarrassed by accidently opening family videos at work!

Usage

Simply $ filenames_secure to obscure and restore.

How it Works

Filenames will be CRC-32'd, with restore record kept in an JSON file in the same folder.

Collisions

If there are hash collisions, a different secure filename will be selected, then the collision check goes again, until there are no collisions - so there should be no risks of getting data lost - however, there are no warranties.

Functional / Stability

If filename A is encoded into B this time, it will be encoded into B again next time, and forever - if there are no collisions that force a change.

Does CRC-32 collide oftenly?

No. It rarely happens. If it occurs, I suggest going out, buying a lottery.

Code

The code is simple:

import os
import abbrs

def current_path():
	p = os.path.realpath(__file__)
	p = os.path.split(p)[0]
	p = os.path.split(p)[-1]
	return p

PACKAGE_NAME = current_path()
RC_FILENAME = f'{PACKAGE_NAME}.json'

def make_dat(ls):
	def is_mp4(x):
		s = x.split('.')
		return len(s) >= 2 and (s[-1] == 'mp4' or s[-2] == 'mp4')

	def check_collision(d):
		for i, v in enumerate(d):
			for j in range(i + 1, len(d)):
				if d[i][0] == d[j][0]:
					return j

	dat = [ [ abbrs.cool_hash(i), i ] for i in filter(is_mp4, ls) ]

	while True:
		i = check_collision(dat)
		if i:
			print(f'Repairing collision: {dat[i][0]} -> {dat[i][1]}')
			dat[i][0] = abbrs.cool_hash(dat[i][0])
		else:
			break

	return dat

def restore():
	dat = abbrs.load_json(RC_FILENAME)
	for hash, filename in dat:
		os.rename(hash, filename)
	abbrs.suspend_file(RC_FILENAME)

def secure():
	dat = make_dat(os.listdir())
	if len(dat) == 0:
		print('MP4 files not found.')
		return

	abbrs.json_dump(RC_FILENAME, dat)
	print(abbrs.table([ 'Hash', 'Filename' ], dat))
	for hash, filename in dat:
		os.rename(filename, hash)

def main():
	if os.path.exists(RC_FILENAME):
		restore()
	else:
		secure()

if __name__ == '__main__':
	main()