[Python] Almost secure file eraser

[Usr6]

#!/usr/bin/env python

import sys

import os

import random

import argparse

print """

#################################

# Rst Almost secure file eraser #

# Usr6 #

#################################"""

parser = argparse.ArgumentParser(description="RST Almost secure file eraser")

parser.add_argument("input", metavar="path/file",

help="sterge fisierul")

parser.add_argument("-m", "--maxstr", metavar="nr", default = 3000000,

help="cati octeti vor fi scrisi la fiecare trecere")

args = parser.parse_args()

def aleator(l):

print random.choice("~*&^%$#@!"),

variabila = ''

for i in range(l):

variabila += random.choice('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890')

return variabila

def writefile(fisier, drepturi, nr):

with open(fisier, drepturi) as handle:

handle.write(aleator(nr))

handle.close

size = os.path.getsize(args.input)

print args.input, size, args.maxstr

ask = raw_input("Esti sigur ca vrei sa-l stergi definitiv?(y/n): ")

if ask != "Yes" and ask != "YES" and ask != "yes" and ask != "Y" and ask != "y":

sys.exit("Nu am sters nimic")

if size <= int(args.maxstr):

writefile(args.input, "wb", size)

else:

writefile(args.input, "wb", int(args.maxstr))

size -= int(args.maxstr)

while size !=0:

if size <= int(args.maxstr):

writefile(args.input, "ab", size)

break

else:

writefile(args.input, "ab", int(args.maxstr))

size -= int(args.maxstr)

if not os.remove(args.input):

print "\n%s deleted" %(args.input)

sys.exit(raw_input("press enter..."))

utilizare:

file_eraser.py filename

help:

file_eraser.py -h

adaugare in context menu(click dreapta):regedit

HKEY_CLASSES_ROOT/*/shell
New key: Eraser
(Default) REG_SZ Eraser...
HKEY_CLASSES_ROOT/*/shell/Eraser
New key: command
(Default) REG_SZ python C:\\Python27\\file_eraser.py "%1"