How to using OpenId in joomla 2.5 or 1.7 - joomla

In joomla 1.5 have a plugin Authentication - Openid, but in joomla 2.5, this plugin not see, How to config Open id in joomla 2.5

You can using OneAll Social Login

OneAll needs registration to a third party service :[

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Can I use joomla to build a portal on a website where

I am new to web development
Can I use joomla to build a portal on a website where each client see information about their purchases

Ruby integration for Joomla using com_api

I am creating an application which uses REST API to access web-services of WordPress and Joomla.
I got success to do this with WordPress but I am unable to do this with Joomla-3.
I want to make a REST API call using Ruby Net::Http to access Joomla powered site. I want to access content of Joomla-3 enabled site using REST API. I found com_api but I don't know how to use it.
Please can anyone help me how to connect Ruby on Rails and Joomla 3 with each other.
I have developed a commercial Joomla package which combines an admin component with an extensible plugin architecture to expand service capabilities. You may refer to may other responses for more information:
REST API for Joomla 3.0
How to Install and use joomla rest api step by step
A key feature of this extension is that it is built upon the Slim PHP micro-framework in order to take advantage of a robust, standards-compliant service route architecture. This allows Joomla to take care of login authentication and group permissions, while Slim exposes routes for GET, POST, PUT, DELETE, etc. Another advantage is that Joomla allows for selective activation and permissioning for different web service plugins.
Installation, configuration and API docs can be found here:
http://learn.getcapi.org
For a general product overview, please visit http://getcapi.org.

REST - Web Services is not default in Magento?

I can see the Soap / XMLRPC are default web services support by magento.
But REST is not default web services in Magento?
Supported API Link
But Magento Admin have the REST API Role Options in admin panel.
REST Web services is only added above 1.7.0 Version in Magento.
Lower Magento versions are only support the SOAP and XMLRPC web services.
Source Link

Adding OAuth Server Support to PyroCMS / Codeigniter?

I am looking for a way to extend PyroCMS into an OAuth2.0 server. I want my users to be able to log onto my "customer" websites using a central authentication system.
I looked into https://github.com/alexbilbie/CodeIgniter-OAuth-2.0-Server but I am having trouble in planning how to integrate this with PyroCMS. I don't want to touch the core authentication so I am thinking of building a module that does this ontop of current authentication system.
Any tips/ideas on how to do this?
I can see that there is already an OAuth module for pyrocms here
which covers OAuth 1 and OAuth 2.0

How can i modify joomla to be an OpenID provider?

i'm trying to find joomla plugins or another components to make joomla an OpenID providerID itself with his database.
Any idea of how can i accomplish this idea?
The only extension I'm aware of that does this is the relatively new JFusion Connect from the people that make the very reputable JFusion.

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