How to do UNIX crypt(3) in javascript?

Is there a way to do UNIX crypt(3) in javascript (in node.js, specifically)?

crypt(3) uses DES, I guess it can done by openssl, but how to access openssl from javascript?

Thanks

UPDATE

I found how to do it with node-ffi:

var ffi = require('node-ffi');

var libcrypt = ffi.Library('libcrypt', {
  'crypt': ['string', ['string', 'string']]
});

console.log(libcrypt.crypt('aa', 'bb'));