encode.py

import base64
import json
from typing import Tuple

from Cryptodome.Cipher import AES
from Cryptodome.Random.random import sample


def encrypt(text: str, encoding='utf-8') -> Tuple[str, str]:
    """
    Credit to https://www.jianshu.com/p/87309e36e027
    and https://segmentfault.com/a/1190000012818254?utm_source=tuicool&utm_medium=referral
    """
    random_string = ''.join(sample([c for c in 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'], 16))

    pubkey = '010001'
    modulus = '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee3' \
              '41f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d' \
              '3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7'
    rs = int(random_string[::-1].encode(encoding).hex(), 16) ** int(pubkey, 16) % int(modulus, 16)
    seckey = format(rs, 'x').zfill(256)

    for random_string in [
        '0CoJUm6Qyw8W8jud',
        random_string
    ]:
        encryptor = AES.new(random_string.encode(encoding), AES.MODE_CBC, iv='0102030405060708'.encode(encoding))
        pad = 16 - len(text) % 16
        text = (text + pad * chr(pad)).encode(encoding)
        text = base64.b64encode(encryptor.encrypt(text)).decode(encoding)
    return text, seckey


if __name__ == '__main__':
    # out = encrypt(json.dumps({
    # '/api/nuser/account/get': {},
    # '/api/music-vip-membership/front/vip/info': {},
    # '/api/purchased/redvip/vipstatus': {},
    # }))
    out = encrypt(json.dumps({
        's': 'One',
        'type': 1,
        'limit': 30,
        'offset': 0
    }))
    body = 'params=' + out[0].replace('/', '%2F').replace('+', '%2B').replace('=', '%3D') + \
           '&encSecKey=' + out[1]
    print(body)