nodejs encrypt files

gistfile1.txt

var fs = require('fs');
var crypto = require('crypto');

var password = new Buffer('{cCQ3d^b&5/Wfp}MV%@Dhy;N)qvTu@?!h:eXL#;A?xS=wZb[w(Z>H^FyK%/P*3aB=_(~A%]f[)LjMVuH(s!Kw%fJwL');


var items=['file1','file2','file3']
	
	for (var i=0;i<items.length;i++) {
		var aes = crypto.createCipher('aes-256-ctr', password);
		var stream = fs.createReadStream(items[i]);      	  
		console.log('start write')		
		var wstream = fs.createWriteStream(items[i]+'.aes');	  
		stream
			.pipe(aes)  // encrypts with aes256
			.pipe(wstream)  // writes to myfile.encrypted
			.on('finish', function (error) {  // finished			
			})		
	}