aes-gcm-stream/examples/failed-decryption.js

A dependency free NodeJS module that implements AES256 GCM encryption and decryption as transform streams.

/**
 * This example shows what happens if we try to decrypt something we don't have
 * the key for.
 */
'use strict';

var aesgcm = require('../index.js');

var encrypt = aesgcm.encrypt({
  key: aesgcm.createKeyBuffer(),
  nonce: aesgcm.createSalt(12) //optional, one will be created if not passed in
});

// wrong key, wah wah
var decrypt = aesgcm.decrypt({
  key: aesgcm.createKeyBuffer()
});

encrypt.write('This message will not be printed to stdout,\n');
encrypt.end('because the decrypter was initialized with the wrong key.\n');

encrypt.pipe(decrypt).pipe(process.stdout);

/**
 * If decryption fails an error will be thrown.
 * So you should always handle errors on the stream!
 */
decrypt.on('error', function(err) {
  console.error('Decryption failed.');
  console.error(err.message);
});