node-http-signature is a node.js library that has client and server components for Joyent's HTTP Signature Scheme.
Usage
Note the example below signs a request with the same key/cert used to start an HTTP server. This is almost certainly not what you actually want, but is just used to illustrate the API calls; you will need to provide your own key management in addition to this library.
Client
var fs =require('fs');var https =require('https');var httpSignature =require('http-signature');var key =fs.readFileSync('./key.pem','ascii');var options = { host:'localhost', port:8443, path:'/', method:'GET', headers: {}};// Adds a 'Date' header in, signs it, and adds the// 'Authorization' header in.var req =https.request(options,function(res) {console.log(res.statusCode);});httpSignature.sign(req, { key: key, keyId:'./cert.pem'});req.end();