This repository has been archived on 2021-01-14. You can view files and clone it, but cannot push or open issues or pull requests.
imgupload-legacy/keygen.py

103 lines
2.8 KiB
Python

from cryptography.fernet import Fernet
from cryptography.fernet import InvalidToken
from pathlib import Path
import settings
import string
import secrets
import sys
import os
# Check if the script was run as root
if os.geteuid() != 0:
exit("Root privileges are necessary to run this script.\nPlease try again as root or using `sudo`.")
# Check if encryption key already exists
enckey = Path(settings.ENCKEY_PATH)
if enckey.is_file():
print("Encryption key found.")
else:
print("Encryption key not found.")
print("Generating key...")
key = Fernet.generate_key()
with open(settings.ENCKEY_PATH, "wb") as key_file:
key_file.write(key)
print("Encryption key generated and stored in secret.key.")
# Load encryption key
def load_key():
with open(settings.ENCKEY_PATH, "rb") as kf:
kdata = kf.read()
return kdata
# Encrypting and storing of key
def encrypt_key(message):
key = load_key()
keyf = Fernet(key)
with open('uploadkeys', 'a+') as uploadkeys:
print(str(token), file=uploadkeys)
with open("uploadkeys", "rb") as keyfile:
keyfile_data = keyfile.read()
encrypted_data = keyf.encrypt(keyfile_data)
with open("uploadkeys", "wb") as keyfile:
keyfile.write(encrypted_data)
def ask_yn(msg):
resps = {"y": True, "n": False}
ask = True
while ask:
proceedraw = input(msg)
if proceedraw.lower() in resps.keys():
proceed = resps[proceedraw]
ask = False
else:
print("Invalid response.")
return proceed
N = 64 # Size of token
# Generate key
token = ''.join(secrets.choice(string.ascii_letters + string.digits) for i in range(N))
# Decrypt the existing keyfile
key = load_key()
keyf = Fernet(key)
genkey = True
uploadkeysp = Path("uploadkeys")
if not uploadkeysp.is_file():
uploadkeysp.touch()
else:
with open("uploadkeys", "rb") as ukf:
# read the encrypted data
encrypted_data = ukf.read()
try:
decrypted_data = keyf.decrypt(encrypted_data) # decrypt data
with open("uploadkeys", "wb") as ukf:
ukf.write(decrypted_data) # write the original file
except InvalidToken:
print("The encrypted key data is invalid and cannot be read.")
print("It may be necessary to clear the file entirely, which will invalidate all tokens.")
proceed = ask_yn("Do you wish to proceed to clearing the uploadkeys file? [y/n] ")
if proceed:
os.remove("uploadkeys")
print("Removed uploadkeys file.")
proceed2 = ask_yn("Would you like to continue and generate a new token? [y/n] ")
if not proceed2:
genkey = False
if genkey:
print("Your new token is: " + str(token)) # Print token
encrypt_key(str(token)) # Encrypt the key and save