aws_signature.js

var http = require('http');
var crypto = require("crypto");

module.exports = function(method, path, bucket, accesskey, secretkey){
var now = new Date().toUTCString();
var returnChar = '\n';
var strToSign = unescape(encodeURIComponent(method + returnChar +
    returnChar + returnChar + returnChar + 'x-amz-date:' + now +
    returnChar + path+bucket));
    
var hmac = crypto.createHmac('sha1', secretkey);
hmac.setEncoding('base64');
hmac.write(strToSign);
hmac.end();
var hash = hmac.read();
return "AWS " + accesskey + ":" + hash;


}