import os
import subprocess
import random
from math import floor


paths = []


def hashAttack(file, path):
    print("Hashing: " + file)
    print("    Old Hash: " + getMd5(path + file))
    hashFile(path + file)
    print("    New Hash: " + getMd5(path + file))


def getMd5(filePath):
    #print("md5sum " + "\"" + filePath + "\"")
    return subprocess.check_output("md5sum " + "\"" + filePath + "\"", shell=True, universal_newlines=True)

def hashFile(filePath):
    rand = int(floor(random.uniform(11,23)))
    cmd = "truncate " + "-s " + "+" + str(rand) + " \"" + filePath + "\""
    #print(cmd)
    subprocess.call(cmd, shell=True)

def startHashing(path):
    for root, dirs, files in os.walk(path):
        for file in files:
            #print(root + "/" + file)
            hashAttack(file, root + "/")

for path in paths:
    startHashing(path)