keygentoolshed/keyGen/encryptandecrypt/ciphers/atbashciphergenerator.js

Key generation utilities for cryptographic operations. QUANTUM ENCRYPTION FOLDER UPDATE!!! See its folder for all <3

import yargs from 'yargs/yargs';
import { hideBin } from 'yargs/helpers';

function atbashCipher(message) {
  const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  const reversedAlphabet = alphabet.split('').reverse().join('');
  const result = [];

  for (const char of message) {
      if (char.match(/[a-z]/i)) { 
          const isUpperCase = char === char.toUpperCase();
          const index = alphabet.indexOf(char.toUpperCase());
          const newChar = reversedAlphabet[index];
          result.push(isUpperCase ? newChar : newChar.toLowerCase());
      } else {
          result.push(char); 
      }
  }

  return result.join('');
}

const argv = yargs(hideBin(process.argv))
    .option('message', {
        alias: 'm',
        description: 'The message to encrypt or decrypt',
        type: 'string',
        demandOption: true
    })
    .help()
    .argv;

    const result = atbashCipher(argv.message);
    console.log('Result:', result);