/**
 * ETH Keystore Guided Bruteforce
 *
 * NO IDEA IF THIS SCRIPT STILL WORKS.
 * I just keep it now because it's a funny story to me.
 *
 * @description
 * A small script I used to bruteforce my ethereum password for a really old
 * wallet from list of possible passphrase combinations. It did the job at
 * that time (phew)! Originally built in node.js, I rejiggered to be a deno
 * app so I wouldn't need to push package.json, and to make importing json
 * files look cleaner.
 *
 * Required Files:
 * `keystore.json` is the wallet keystore
 * `template.json`` is nested array of word/phrase combinations
 *
 * @example deno run deno run wallet_guided_bruteforce.js
 */
import { bold, green, red, yellow } from "jsr:@std/fmt/colors";
import keythereum from "npm:keythereum";

import keystore from "./keystore.json" assert { type: "json" };
import passwordTemplate from "./template.json" assert { type: "json" };

const response = getPasswordCombinations(passwordTemplate)
  .find((password) => Boolean(checkPass(password)));

if (!response) console.log(red(bold("Failed to find password")));

function checkPass(password) {
  try {
    const privateKey = keythereum.recover(password, keystore).toString("hex");
    console.log(`0x${keystore.address}: 0x${privateKey}`);
    console.log(green(bold("FOUND PASSWORD", password)));
    return password;
  } catch (e) {
    console.log("tried", password);
    // Expected "bad-pass" error is mismatch. Anything else is sus.
    if (!(e.message || "").includes("authentication code mismatch")) {
      console.log(
        yellow(bold("Unexpected Error, please try previous password")),
      );
      console.log(e);
    }
  }
}

function getPasswordCombinations(arr) {
  if (arr.length == 1) return arr[0];

  const result = [];
  const allCasesOfRest = getPasswordCombinations(arr.slice(1)); // recur with the rest of array

  for (let i = 0; i < allCasesOfRest.length; i++) {
    for (let j = 0; j < arr[0].length; j++) {
      result.push(arr[0][j] + allCasesOfRest[i]);
    }
  }
  return result;
}

const exampleKeystoreJsonFile = {
  "version": 3,
  "id": "36ff6493-21a5-41f5-998f-ed8e53627ed2",
  "address": "a9f7d6911a3169289229b761099403db87581640",
  "crypto": {
    "ciphertext":
      "b09e6dfe731c092e4951b861b7c576dcd65834fdbbf3fd5c39e88a5510c2a0b0",
    "cipherparams": {
      "iv": "3e125a0889bbac987901b7007f2f571a",
    },
    "cipher": "aes-128-ctr",
    "kdf": "scrypt",
    "kdfparams": {
      "dklen": 32,
      "salt":
        "58298ca71cf02f698780a1ba53a3efc1f4162c81296045214cfaecc75ce849e0",
      "n": 8192,
      "r": 8,
      "p": 1,
    },
    "mac": "41f440e55e9da8e5075cb401cf9a66cff34d26eb3ca772a70ed9370c99f697a1",
  },
};

const exampleTemplateFile = [
  ["one", "two", "three"],
  ["two", "two", "three"],
  ["one", "two", "three"],
  ["one", "two", "three"],
  ["one", "two", "three"],
];