aws-sign

Calculates Authorization header for Amazon AWS REST requests

node-aws-sign

Simple module to calculate Authorization header for Amazon AWS REST requests.

Simple it is:

var AwsSign = require('aws-sign');
var signer = new AwsSign({ 
    accessKeyId: 'AKIAIOSFODNN7EXAMPLE',
    secretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY'
});
 
var opts = {
    method: 'PUT',
    host: 'johnsmith.s3.amazonaws.com',
    path: '/photos/puppy.jpg',
    headers: { ... },
    ... // Other request options, ignored by AwsSign. 
};
signer.sign(opts);
https.request(opts, ...);

The following keys are mandatory:

method
host
path

Others are optional. A date header (headers.date) will be added for you if it is not already set.

Non-goals

Node.js has no legacy ;-) so there is no need to support some legacy features of Amazon API for older software. I.e. there is no support for path-style bucket access.

x-amz-date substitution is not supported because Node's http module has no problems setting Date header.

Multiple x-amz- keys are not supported. I.e. the following part of the example won't work:

X-Amz-Meta-ReviewedBy: joe@johnsmith.net
X-Amz-Meta-ReviewedBy: jane@johnsmith.net

Use a single header instead:

X-Amz-Meta-ReviewedBy: joe@johnsmith.net,jane@johnsmith.net

0.0.x to 0.1.x migration guide

0.1.x supports the same options as http.request (thanks to Ben Trask).

Before:

    auth = signer.sign({
        method: 'PUT', 
        bucket: 'johnsmith', 
        path: '/photos/puppy.jpg', 
        date: 'Tue, 27 Mar 2007 21:15:45 +0000', 
        contentType: 'image/jpeg'
    });
    http.request({
        …
        headers: {
            …,
            Authorization: auth
        }
    });

After:

    var opts = {
        method: 'PUT', 
        host: 'johnsmith.s3.amazonaws.com',
        path: '/photos/puppy.jpg', 
        headers: {
            date: 'Tue, 27 Mar 2007 21:15:45 +0000', 
            contentType: 'image/jpeg'
        }
    };
    signer.sign(opts);
    http.request(opts);