# Auth stream

A stream that authorizes your client before it allows data through to your secret stream.

On the client pipe your stream into the auth stream and out. Then login in to the auth stream.

On the server, handle your login logic in the auth stream and pass it a secret stream to give access to once authorized.

``` js
var Auth = require("auth")
    , net = require("net")
    , through = require("through")

net.createServer(function (stream) {
    var secret = through(function (data) {
            console.log(data === "anything")
            this.emit("data", "secret")
        })
        , auth = Auth(secret, function (user, pass) {
            if (user === "steve" && pass === "jones") {
                return true
            }
        })

    stream.pipe(auth).pipe(stream)
}).listen(8080, function () {
    var stream = net.connect(8080)
        , auth = Auth()

    stream.pipe(auth).pipe(stream)

    stream.on("data", function (secret) {
        console.log(secret === "secret")
    })

    // login(user, pass)
    auth.login("steve", "jones")

    stream.write("anything")
})
```