OAuth

As you know if you've read Part 1, Twitter uses OAuth for user authorization.

Many APIs require you to authenticate with them, using Oauth or other mechanisms, to act on behalf of a web user.

OAuth is an open protocol that allows secure API authorization in a simple and standard method from desktop and web applications.

The target is to provide a Web application that enables users to be authenticated to Twitter through OAuth and update their status.

A Web site adopting OAuth as one of its authentication protocols will enhance the privacy and security for users.

The security mechanism behind the two pairs of keys is called the Open Authentication (OAuth) protocol (see Resources).

The majority of these implementations are hosted by the OAuth project via a Google Code repository.

Another problem is that the site doesn't use OAuth, and I still had to fill out a lengthy form and create an account.

OAuth operates much like a credit card does, but with authorization data as the currency.

Usually applies if you are using a different authentication scheme, for arguments sake OAuth WRAP, the Credentials property is of no use.

With OAuth, a resource owner can authorize third party application access to the protected resource without compromising user credentials.

This walk-through demonstrates a typical OAuth session and includes the perspectives of the User, Consumer, and Service Provider.

The Facebook Platform provides support for OAuth 2. 0 authentication as well as support for an older, custom authorization signature scheme.

In many cases (if done right), the end-user will not know anything about OAuth, what it is or how it works.

But they also admit, "The traditional OAuth flow for desktop clients can be cumbersome. "

With OAuth, users' credentials are protected while sharing protected resources among different Web sites.

Kern also told us that the most recent releases of the app included OAuth support and the addition of "on sale" tweets.

Ryan Heaton has implemented OAuth for Spring security which can be found here.

Developers can use the full strength of OAuth or can use less stringent methods where OAuth is not needed.

This article has demonstrated how to use the OAuth mechanism in Twitter to update the status of an account from a client Java program.

OAuth requires that Service Providers first authenticate the User, and then ask them to grant access to the Consumer.

Sites supporting OAuth include Twitter, Ma. gnolia and Google (Alpha launch post here).

Currently, Twitter is working on a way to enable OAuth authentication for secured requests.

The specification includes in Appendix A a similar example but focuses on the HTTP calls syntax.

Authentication with both your admin credentials and OAuth key are required.

You can leverage them to add OAuth authentication support to your HttpClient application.

In fact, OAuth by itself provides no privacy at all and depends on other protocols to accomplish that (such as SSL).

However, Amazon's endorsement of OAuth might change that situation.

Both the valet key and ATM cards are good metaphors for OAuth from a user perspective.

Now you can get the user profile via HttpClient using OAuth authentication, as shown in Listing 5.

It is strongly recommended that all implementations are updated to the new revision.

To use OAuth authentication you need to use preemptive authentication.

A typical OAuth scenario can be described as follows.

At present, OAuth is not widely deployed.

For a website that requires preemptive authentication for OAuth, you cannot use HttpClient 3. 0. x.

RESTChess makes use of OAuth, which is an "open protocol to allow secure API authentication" including digital signature.

Part 2 in the series will demonstrate how to develop a more practical OAuth-enabled Twitter Web client.

The following example shows how to get a user profile from LinkedIn using HttpClient with OAuth support.

An extra benefit of Twitter4J is that it supports OAuth, which will greatly alleviate our development work.

Figure 1 shows the typical three-legged OAuth dance.

Upon being called, the groovlet obtains a key parameter from Twitter: oauth_verifier.

I will first show you how to develop a simple desktop client for Twitter using OAuth.

Web sites that only support OAuth 1. 0 don't provide the "challenge" response.

The OAuth 2. 0 specification is under development.

For example, hosted Google Apps services can identify themselves (and their users) to local applications using OAuth.

Take for example the recent move towards OAuth logins, which many developers find unnecessarily complicated.

Usergrid's API implements an oAuth 2. 0 authentication model.

When OAuth-protected resources are requested, typically the client will get an HTTP 401 response including a WWW-Authentication header

It is not meant to replace existing OAuth or Digest protocols that ensure message integrity

Robust OpenID and OAuth (and possibly Hybrid) client support

At a high level OAuth works as follows