SenseCon '21 Announce Challenge

README.md

Hello world!

This was the internal @sensepost SenseCon 2021 announcement email (stripped), together with the supporting challenge.

Have phun!

announce.ts

const title: string = `internal sensecon 2021 announcement`;

const data = {
  message: new Uint8Array([
    1787, 1728, 1737, 1732, 1732, 1672, 1759, 1741, 1672, 1752,
    1732, 1737, 1745, 1672, 1737, 1672, 1743, 1737, 1733, 1741, 
    1687, 1672, 1784, 1729, 1734, 1743, 1672, 1768, 1732, 1741, 
    1735, 1734, 1730, 1746, 1737, 1672, 1729, 1742, 1672, 1745, 
    1735, 1757, 1672, 1755, 1735, 1732, 1758, 1741, 1740, 1672, 
    1756, 1728, 1729, 1755, 1673
  ]),
  code: new Uint8Array([
    0, 97, 115, 109, 1, 0, 0, 0, 1, 134, 128, 128, 128, 0, 1, 96,
    1, 127, 1, 127, 3, 130, 128, 128, 128, 0, 1, 0, 4, 132, 128,
    128, 128, 0, 1, 112, 0, 0, 5, 131, 128, 128, 128, 0, 1, 0, 1,
    6, 129, 128, 128, 128, 0, 0, 7, 148, 128, 128, 128, 0, 2, 6,
    109, 101, 109, 111, 114, 121, 2, 0, 7, 103, 101, 116, 95, 107,
    101, 121, 0, 0, 10, 151, 128, 128, 128, 0, 1, 145, 128, 128,
    128, 0, 0, 32, 0, 65, 163, 12, 106, 65, 0, 32, 0, 65, 133, 1,
    70, 27, 11
  ]),
}

const announcement = (word: string): string => {
  return ` 
  ${title}

  hey everyone! 🖖

  <stripped real sensecon announce.txt here>

  ${word}

  --
  leon
  `;
}

console.log(announcement(`be there or be ⬜️!`));
const key = (): number => {
  const len: number = announcement(`W.O.P.R.`).length;
  // todo: use code as wasm instead of returning 0
  return 0;
}

const htp = (k: number): Uint8Array => {
  return data.message.map((e: number) => {
    return e ^ k;
  });
}