winderica / DailyReport

Submit your health status to your fucking department everyday

DailyReport

Submit your health status to your fucking department everyday

Usage

1. yarn install
2. edit config.json
3. yarn build
4. use crontab or something else to run it everyday

Tips

• you should manually fill the form and submit it at least once before using this project
• please reinstall dependencies and rebuild it if you are from v2
• ua is the most common user-agent at the moment, modify it if necessary
• 0 12 * * * sleep $(( RANDOM \% 21600 )); node /path/to/index.js will run randomly from 12:00 to 18:00 everyday
• $RANDOM should be supported by your shell, or you can get a 32-bit random number by running od -vAn -N4 -tu4 < /dev/urandom

Bonus

Well, HUST One uses a ridiculous DES algorithm written by someone a trillion years ago to encrypt the username, password and nonce.
This algorithm, which receives 3 keys but differs a lot from Triple-DES, is not surprisingly incorrect.

• Encryption scheme of Triple-DES is usually EDE, rather than EEE
• Implementation of key expansion is wrong

The original script is extremely disgusting, so I reimplemented it in a not so disgusting way.

const { createCipheriv } = require('crypto');

const magicTable = [0, 1, 2, 6, 38, 37, 36, 7, 8, 9, 10, 14, 46, 45, 44, 15, 16, 17, 18, 22, 54, 53, 52, 23, 24, 25, 26, 30, 62, 61, 60, 31, 32, 33, 34, 35, 5, 4, 3, 39, 40, 41, 42, 43, 13, 12, 11, 47, 48, 49, 50, 51, 21, 20, 19, 55, 56, 57, 58, 59, 29, 28, 27, 63];

const toBuffer = (t) => Buffer.from(t.padEnd(Math.ceil(t.length / 4) * 4, '\0'), 'utf16le').swap16();
const toBits = (str) => [...toBuffer(str)].flatMap((i) => i.toString(2).padStart(8, '0').split('').map(Number));

const desEncrypt = (plain, key) => {
    const k = magicTable.map((i) => toBits(key)[i]).join('').match(/.{1,8}/g).map(i => parseInt(i, 2));
    const cipher = createCipheriv('DES-ECB', Buffer.from(k), null).setAutoPadding(false);
    return Buffer.concat([cipher.update(plain), cipher.final()]);
}
const desEEE = (plain, k1, k2, k3) => {
    return desEncrypt(desEncrypt(desEncrypt(toBuffer(plain), k1), k2), k3).toString('hex').toUpperCase();
}