109 lines
3.4 KiB
Python
109 lines
3.4 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
|
|
|
|
|
|
# Load secret
|
|
def load_secret():
|
|
with open(settings.ENCKEY_PATH, "rb") as sf:
|
|
secret = sf.read()
|
|
return secret
|
|
|
|
|
|
# Encrypting and storing of key
|
|
def append_uploadkey(akey):
|
|
with open('uploadkeys', 'a+') as uploadkeysf:
|
|
print(str(akey), file=uploadkeysf)
|
|
|
|
|
|
def decrypt_uploadkeys():
|
|
with open("uploadkeys", "rb") as uploadkeysf:
|
|
uploadkeys_data = uploadkeysf.read()
|
|
|
|
try:
|
|
secret = load_secret()
|
|
secretf = Fernet(secret)
|
|
decrypted_data = secretf.decrypt(uploadkeys_data) # decrypt data
|
|
with open("uploadkeys", "wb") as ukf:
|
|
ukf.write(decrypted_data) # write the original file
|
|
print("Done decrypting") # debug
|
|
return True
|
|
except InvalidToken:
|
|
print("InvalidToken") # debug
|
|
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 key? [y/n] ")
|
|
if not proceed2:
|
|
return False
|
|
else:
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
|
|
def encrypt_uploadkeys():
|
|
with open("uploadkeys", "rb") as uploadkeysf:
|
|
uploadkeys_data = uploadkeysf.read()
|
|
|
|
secret = load_secret()
|
|
secretf = Fernet(secret)
|
|
encrypted_data = secretf.encrypt(uploadkeys_data)
|
|
|
|
with open("uploadkeys", "wb") as uploadkeysf:
|
|
uploadkeysf.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
|
|
|
|
|
|
# Check if encryption secret already exists
|
|
if Path(settings.ENCKEY_PATH).is_file():
|
|
print("Encryption secret found.")
|
|
else:
|
|
print("Encryption secret not found.")
|
|
print("Generating secret...")
|
|
newsecret = Fernet.generate_key()
|
|
with open(settings.ENCKEY_PATH, "wb") as secret_file:
|
|
secret_file.write(newsecret)
|
|
print("Encryption secret generated and stored in {0}".format(settings.ENCKEY_PATH))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
start = ask_yn("Have you run this program as the correct user (for example, nginx uses www-data)? [y/n] ")
|
|
if not start:
|
|
print("Please run this as the correct user with: sudo su [user] -s /bin/sh -c 'python3 keygen.py'")
|
|
|
|
else:
|
|
uploadkeysp = Path("uploadkeys")
|
|
if not uploadkeysp.is_file():
|
|
uploadkeysp.touch()
|
|
|
|
if decrypt_uploadkeys(): # Decrypt the file
|
|
N = 64 # Size of key
|
|
key = ''.join(secrets.choice(string.ascii_letters + string.digits) for i in range(N))
|
|
print("Your new key is: " + str(key)) # Print key
|
|
append_uploadkey(key) # Save the new key to file unencrypted
|
|
encrypt_uploadkeys() # Encrypt the uploadkeys file
|
|
else:
|
|
print("Exiting.")
|