cryptography - how to generate a random key for AES for python py3rijndael module

Question

import unittest
import base64
from py3rijndael import Rijndael

def test_rijndael():
    key = 'qBS8uRhEIBsr8jr8vuY9uUpGFefYRL2HSTtrKhaI1tk='
    print(len(key))
    
    a=input("Please Enter Plain text: ")
    plain_text=a.encode('utf-8')
    rijndael = Rijndael(base64.b64decode(key), block_size=32)
    padded_text = plain_text.ljust(32, b'x1b')
    cipher = rijndael.encrypt(padded_text)
    cipher_text = base64.b64encode(cipher)
    pl_txt=rijndael.decrypt(cipher)
    pl_txt[:len(plain_text)]
    return cipher_text

In the above code, I want to generate a random key for the secure private key changing any character in the key for ex: making key = 'qBS8uRhEIBsr8jr8vuY9uUpGFefYRL2HSTtrKhaI1tk+' or some thing else, making test to fail with invalid key size. could someone please help with this.

Answer 1

等待大神答复