JOID is an OpenID 1.x/2.0 Java library that lets you implement providers as well as relying parties. JOID compiles under JDK 1.4 or later.

Flows

UsageFlows describes the common usage flows.

Usage

The over-riding design goal of JOID is simplicity of use. The javadocs will tell you more, but the main use case is:

// Get a store implementation (used to handle associations).
Store store = ...

// Get an OpenID implementation
OpenId openId = new OpenId(store);

// Process the request into a response
String response = openid.handleRequest(query);

JOID processes messages by using a factory to parse the request, and then use this request to generate a response.

If you wish, you can also drop down to a slightly lower level, for example, should you need to specify which type of crypto implementation to use, or if you need to inspect incoming requests or outgoing responses.

It's still a very simple API:

// Parse the incoming message
Request req = RequestFactory.parse(string);

// Get a store implementation (used to handle associations) and a 
// crypto implementation (to handle the OpenID protocol crypto)
Store store = ...
Crypto crypto = ...

// Use the request and process with the store and crypto to
// produce a response
Response resp = req.processUsing(store, crypto);

JOID Enabling Your Application

OpenIDConsumer

Setting Up A JOID Server

ServerInstallation

Mailing lists

JOID has two mailing lists, both public to join: