Hash numbers for order no, etc.

renum.js

const crypto = require('crypto');

function renum(num, key) {
  // Convert the number to a string
  const numStr = String(num);
  const len = numStr.length;

  // Hash the string using SHA-256
  const hash = crypto.createHash('sha256');
  const hashedNum = hash.update(numStr, 'utf8').digest('hex').slice(0, len + 2);

  // Convert the hash value to an integer
  const hashedNumInt = parseInt(hashedNum, 16);

  // Convert the key to a buffer
  const keyBuffer = Buffer.from(key.replace(/-/g, ''), 'hex');

  // Apply XOR operation with the key
  const xoredNumInt = Math.abs(hashedNumInt ^ keyBuffer.readUInt32BE(0));

  return xoredNumInt.toString().slice(0, len);
}

// Example usage
const key = 'aabbccddeeff00112233445566778899';

for (let i = 0; i < 10; i++) {
  console.log(i + 123456, renum(i + 123456, key));
}

for (let i = 0; i < 10; i++) {
  console.log(i + 12345678, renum(i + 12345678, key));
}