LcL8xZvy

1"""
2This Script needs django and pycrypto.
3If you want to use this, just call encode(wanna_crypto_text) or decode(encoded_text).
4 
5When your secret key changed, you can't decode encoded text before changed, so becareful.
6"""
7 
8import hashlib
9from Crypto.Cipher import AES
10import base64
11from django.conf import settings
12 
13secret_key = hashlib.sha256(settings.SECRET_KEY.encode()).digest()
14block_size = 32
15padding = '|'
16 
17 
18def encode(target):
19    aes = AES.new(secret_key)
20    target = pad(target)
21    after = aes.encrypt(target)
22    based = base64.b64encode(after)
23    return based.decode()
24 
25 
26def decode(target):
27    based = base64.b64decode(target)
28    aes = AES.new(secret_key)
29    after = aes.decrypt(based)
30    return unpad(after)
31 
32 
33def pad(s):
34    return s + (block_size - len(s) % block_size) * padding
35 
36 
37def unpad(s):
38    return s.decode().rstrip('|')