How to encrypt with SHA1 in nodejs?

Question

I have following bash script:

#!/bin/bash

file="$1"

bucket="mybucket"
resource="/${bucket}/${file}"
contentType="image/png"
dateValue="Thu, 10 Mar 2016 04:13:24 +0545"
stringToSign="PUT\n\n${contentType}\n${dateValue}\n${resource}"
vs3Key="AKXXXXXXXXXXXXXXXXXXX"
s3Secret="/Wxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
signature=`echo -en ${stringToSign} | openssl sha1 -hmac ${s3Secret} -binary | base64`
echo $signature

I want to write this same code in nodejs. This is what I have written so far, but the signature is not valid:

'use strict';

var secret= '/Wxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';
var file = process.argv[2];
var crypto = require('crypto');
var dateValue = 'Thu, 10 Mar 2016 04:13:24 +0545';
var bucket = "mybucket";
var resource = "/" + bucket + "/" + file;
var contentType = "image/png";
var stringToSign = "PUT\n\n"+contentType+"\n"+dateValue+"\n"+resource;
var s3Key = "AKxxxxxxxxxxxxxxxxxxxxxxxxxxx";

var hmac = crypto.createHmac("sha1", secret).update(stringToSign).digest('hex');
console.log(new Buffer(hmac).toString('base64'));

Answer 1

Your bash code is calling openssl with the -binary argument, so you should be doing the same in the JS code.

According to the documentation :

hash.digest([encoding])

Calculates the digest of all of the data passed to be hashed (using the hash.update() method). The encoding can be 'hex' , 'binary' or 'base64' . If encoding is provided a string will be returned; otherwise a Buffer is returned.