IDEA

It is about the International Data Encryption Algorithm, a.k.a IDEA cypher which is implemented in JavaScript within ~10 KiB. If you want better compatibility, you may need the polyfill version dist/idea.all.js, which has shimmed Int8Array for you.

Compatibility

• IE6+ (polyfills required for ES7- browsers)
• NodeJS

Install

npm install @aleen42/idea

Usage

• without padding:

  function paddingToBytes(str) {
      typeof str !== 'string' && (str = JSON.stringify(str));
  
      const blockSize = 8;
      const srcBytes = encoder.encode(str);
      const len = Math.ceil(srcBytes.length / blockSize) * blockSize; // padding with \x00
      const src = new Int8Array(len);
      src.set(srcBytes);
      return src;
  }
  
  const IDEA = require('@coremail/idea');
  const idea = new IDEA(str2bytes('private key'), /* no padding */-1);
  idea.encrypt(paddingToBytes('message')); // => Int8Array[]

• with xor padding (ENC3 by default):

  const encoder = new TextEncoder(); 
  const IDEA = require('@coremail/idea');
  const idea = new IDEA(str2bytes('private key'), /* ENC3 by default */197);
  idea.encrypt(encoder.encode('message')); // => Int8Array[]

Release History

• ==================== 1.0.0 Initial release ====================

⛽ How to contribute

Have an idea? Found a bug? See how to contribute.

📜 License

MIT © aleen42