node-aes-cmac/index.js

A pure Node.js implementation of the AES-CMAC algorithm (NIST 800-38B / RFC 4493).

var aesCmac = require('./lib/aes-cmac.js').aesCmac;

exports.aesCmac = function (key, message, options) {
  validateKey(key);
  var messageBuffer = validateMessage(message);
  options = options ? options : {};
  var result = aesCmac(key, messageBuffer);
  return  options.returnAsBuffer ? result : result.toString('hex');
};

function validateKey(key) {
  if ((typeof key !== 'string') && !(key instanceof Buffer)) {
    throw new Error('Keys must be provided as a Buffer or string.');
  }
}

function validateMessage(message) {
  if ((typeof message !== 'string') && !(message instanceof Buffer)) {
    throw new Error('The message must be provided as a string or Buffer.');
  }
  return (message instanceof Buffer) ? message : new Buffer(message);
}