OAuth. The Authoritative Guide to OAuth 1.0. OAuth Core 1.0 (also known as RFC 5849), the community-based specification published on December 4th, 2007, revised June 24th, 2009, and finalized in April 2010 is one of the fastest growing Open Web specifications. It provides a much needed solution for security web APIs without requiring users to share their usernames and passwords. This guide attempts to explain OAuth by taking a look at its history, architecture, and technical details.
It is written primarily for developers looking to implement services offering secure APIs or developers implementing clients using OAuth-protected services. The OAuth specification has gone through a few complete rewrites. OAuth 1.0 is being replaced by the new OAuth 2.0 protocol from the IETF. Like this: Like Loading... OAuth. For MediaWiki's (the software used by Wikipedia) OAuth support, see mw:Help:OAuth OAuth is an open standard for authorization, commonly used as a way for Internet users to log into third party websites using their Microsoft, Google, Facebook or Twitter accounts without exposing their password.[1] Generally, OAuth provides to clients a 'secure delegated access' to server resources on behalf of a resource owner.
It specifies a process for resource owners to authorize third-party access to their server resources without sharing their credentials. Designed specifically to work with Hypertext Transfer Protocol (HTTP), OAuth essentially allows access tokens to be issued to third-party clients by an authorization server, with the approval of the resource owner. The third party then uses the access token to access the protected resources hosted by the resource server.[2] OAuth is a service that is complementary to and distinct from OpenID.
History[edit] OAuth 2.0[edit] Security[edit] Uses[edit] Gentle introduction to OAuth. By Cosimo Streppone 25th January 2012: Status update API on My Opera no longer available This article is partially out of date: the status update API (see the "Get your My Opera status" section) on My Opera is no longer available. We will provide such functionality in a different way in the future — until then, watch this space. Introduction OAuth is a specification defining an authentication protocol that allows applications to access users' data in a secure way. Why was OAuth invented? OAuth was invented because a lot of emerging services and APIs were starting to use Google accounts, Twitter, Facebook, etc., so the users of these third-party applications were forced to share their own Google, Twitter or Facebook passwords.
When Twitter recently ceased support for Basic Auth APIs, and migrated their systems to OAuth, our code was already using the new OAuth-based authentication. OAuth for end users An example: Opera Portal After granting access, you will either: Managing grants Done! Http: $ . Identification Oauth Twitter sur son site avec PHP - Tutorial. How to Authenticate Users With Twitter OAuth. Beginning August 16th, Twitter will no longer support the basic authentication protocol for its platform. That means the only way to authenticate users will be through a Twitter application. In this tutorial, I'll show you how to use Twitter as your one-click authentication system, just as we did with Facebook. Step 1: Setting Up The Application We'll first need to set up a new Twitter application. Register a new app at dev.twitter.com/apps/Fill in the fields for your site accordingly, just be sure to select Browser in Application Type, and set the Callback URL to something like ( won't be accepted because it doesn't have a domain name).
Now, you'll see the screen as shown below. We will be using the Consumer key and Consumer secret values shortly. Now that this is done, let's download a library. Find the twitteroauth directory inside the zip file, and extract it to your application's folder. Step 2: Registering Users Registering users. Creating a Twitter OAuth Application. OAuth can be a tricky concept to wrap your head around at first, but with the Twitter API now requiring its use, it is something you need to understand before creating a Twitter application. This tutorial will introduce you to OAuth, and walk you through the process of creating a basic application. Introduction In this tutorial, we will be building a simple app that allows users to apply different effects to their Twitter avatar.
In order to work with the Twitter API, we must use OAuth to authorize our app to make requests on the user's behalf. Our application flow will be something like this: The user is asked to connect with Twitter.The user is presented a list of preview avatars to select from.Upon selection, the user is presented a confirmation screen showing the original and new avatar for comparison. Setup To start, we should set up our source directory. Here's what your directory tree should look like: tutorial cssimglibtmp (writable) Register Your Application Authentication Downloading. Introducing ‘Sign-in with Twitter’, OAuth-Style “Connect” Yesterday Twitter released ‘Sign-in with Twitter’, the ability to use Twitter as a delegated sign-in provider for third-party websites.
The cool thing about this new feature, which is part of their OAuth API beta, is that it is completely standard OAuth. No extensions, not secret sauce, and not another proprietary provider (yes, I’m looking at you Facebook). It is Open done right. With this small enhancement of the Twitter OAuth API, Twitter created a product that directly competes with Facebook Connect. The premise of the new feature is simple. When Facebook introduced their Connect product, they offered sites two key features: the ability to use existing Facebook accounts for their own needs, and access Facebook social data to enhance the site.
What Twitter is doing with ‘Sign-in with Twitter‘ is very different. ‘Sign-in with Twitter‘ offers these sites the ability to do this right. Instead of the username and password text boxes, sites will use the new ‘Sign-in with Twitter‘ button: Security Assertion Markup Language. The single most important requirement that SAML addresses is web browser single sign-on (SSO). Single sign-on is common at the intranet level (using cookies, for example) but extending it beyond the intranet has been problematic and has led to the proliferation of non-interoperable proprietary technologies. (Another more recent approach to addressing the browser SSO problem is the OpenID protocol.)[2] How SAML works[edit] The SAML specification defines three roles: the principal (typically a user), the identity provider (IdP), and the service provider (SP).
In the use case addressed by SAML, the principal requests a service from the service provider. The service provider requests and obtains an identity assertion from the identity provider. Before delivering the identity assertion to the SP, the IdP may request some information from the principal – such as a user name and password – in order to authenticate the principal. History of SAML[edit] Versions of SAML[edit] XML Schema (XSD) 1. 2. HMAC. SHA-1 HMAC Generation.
In cryptography, a keyed-hash message authentication code (HMAC) is a specific construction for calculating a message authentication code (MAC) involving a cryptographic hash function in combination with a secret cryptographic key. As with any MAC, it may be used to simultaneously verify both the data integrity and the authentication of a message.
Any cryptographic hash function, such as MD5 or SHA-1, may be used in the calculation of an HMAC; the resulting MAC algorithm is termed HMAC-MD5 or HMAC-SHA1 accordingly. The cryptographic strength of the HMAC depends upon the cryptographic strength of the underlying hash function, the size of its hash output, and on the size and quality of the key. An iterative hash function breaks up a message into blocks of a fixed size and iterates over them with a compression function. For example, MD5 and SHA-1 operate on 512-bit blocks. Definition (from RFC 2104)[edit] where H is a cryptographic hash function, | denotes concatenation, The Problem with Passwords - A List Apart Articles. Usability researcher Jakob Nielsen’s recent column advocates a fundamental change to password field design on the web.
He believes that the time has come “to show most passwords in clear text as users type them,” abandoning the traditional approach that displays a series of asterisks or bullets in place of the actual password. Issue № 300 Nielsen’s controversial proposal demonstrates the principle that most design decisions require trade-offs. User goals and business objectives do not always intersect. Security, usability, and aesthetic concerns often compete. We must set priorities and balance these interests to achieve the best results in each situation. Security issues are particularly difficult to deal with because they’re an annoyance. Unfortunately, this is reality. A password will never be visible outside the mind of the person who created it.Both the username and password can be recalled from memory when needed. Now you see it, now you don’t#section1 (Line wraps marked » —Ed.)
“Lazy Registration” and the value of iterative research & design « Madgex Labs Blog. New 'OpenID Connect' Proposal Could Solve Many of the Social Web's Woes | Webmonkey| Wired.com. David Recordon, one of the key architects of OpenID and other identity technologies that have emerged over the past five years, has envisioned a new direction for OpenID. His proposal, which was drafted with input from several people in the OpenID community, is called OpenID Connect. At the highest level, it essentially rebuilds OpenID on top of OAuth 2.0, combining the two popular open source systems for authenticating users and letting them share data with social websites and applications. “OpenID Connect is an attempt to pull the best pieces of two separate technologies together, to create a single technology stack that’s simpler for everyone to use,” Recordon tells Webmonkey.
The proposed approach combines several interactions around logging in and sharing data with a website or application into one simple step. OpenID Connect hopes to broaden the technology’s reach as well. Many of the complexity problems in OAuth were solved by the creation of OAuth 2.0 earlier this year. See Also: Introducing WebFinger. WebFinger is an updated take on the Name/Finger protocol using HTTP, XRD, and host-meta (instead of a direct TCP connection on port 79) to obtain information about user accounts. It works by defining a new account URI scheme and a protocol for resolving it into an extensible descriptor of the account and its owner. The account URI, using the newly proposed ‘acct‘ scheme, is used to identify user accounts at a given host which are typically used for the purpose of resource management and establishing local identity (at the host).
User accounts include a local identifier (username, screenname, or handle), and a host which can resolve and (usually) authenticate the local identifier. The protocol consists of: A URI scheme to identify accounts using a familiar syntax.A simple protocol for resolving account URIs into an extensible descriptor. Account URIs are useful in most places HTTP URIs are accepted. What Problem is WebFinger Trying to Solve? Consider the following two login prompts: No. OpenAM. Ident Engine. Janrain | user management platform for the social web. Technologies Authentification Unique.