base64 cipher fix

base64fix.js

// a shim to fix base64 cipher output, untested

var Cipher = require('crypto').Cipher;
var update = Cipher.prototype.update, 
    final = Cipher.prototype.final;

Cipher.prototype.update = function(data, input, output) {
  if (output === 'base64') {
    data = update.call(this, data, input, 'binary');
    return new Buffer(data, 'binary').toString('base64');
  }
  return update.apply(this, arguments);
};
Cipher.prototype.final = function(output) {
  if (output === 'base64') {
    var data = final.call(this, 'binary');
    if (!data) return data;
    return new Buffer(data, 'binary').toString('base64');
  }
  return final.apply(this, arguments);
};