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WordPress OAuth & OpenID Connect Single Sign-On (SSO) plugin enables secure login into WordPress using Facebook as OAuth and OpenID Connect provider. You can also configure the plugin using different custom providers and standard IDPs. It supports advanced Single Sign-On (SSO) features such as user profile Attribute mapping, Role mapping, etc. Here we will go through a guide to configure SSO between WordPress and Facebook. By the end of this guide, users should be able to login to WordPress from Facebook. To know more about other features we provide in WP OAuth Single Sign-On ( OAuth & OpenID Connect Client ) plugin, you can click here.

Pre-requisites : Download And Installation

• Log into your WordPress instance as an admin.
• Go to the WordPress Dashboard -> Plugins and click on Add New.
• Search for a WordPress OAuth Single Sign-On (SSO) plugin and click on Install Now.
• Once installed click on Activate.

Steps to configure Facebook Single Sign-On (SSO) Login into WordPress

1. Setup Facebook as OAuth Provider

• First of all, Login/ Signup in Facebook developer console at https://developers.facebook.com/

• Go to My apps .

• Click on Create app to create a new app.

• Select what your app is going to work for.

• Enter the required details and click on create app.

• Complete the security check and click on Submit button.

• Select Facebook Login by clicking on the set up button .

• Select Facebook Login -> Settings under Products option in the navigation bar .

• Under Client OAuth Settings, enter the Callback/Redirect URL (from your miniOrange Oauth Client plugin) in the Valid OAuth Redirect URIs field. Click on the Save button to save your configurations.
  Most importantly, your Callback/Redirect URI should be https and not http. It is mandatory while configuring Facebook as an OAuth Server.

• Go to Settings -> Basic to view your App Id and App Secret Refer to the image below).

• Enter your Privacy Policy URL in the Privacy Policy URL field and choose a category from the dropdown in the Category field. Then, click on Save Changes button to save your configurations.
• Copy your App ID and your App Secret and save it in your miniOrange OAuth Client Plugin/Module. (under client id and client secret field respectively).

• Change you app status from In Development to Live by clicking on OFF as shown in the image below. Then, click on confirm to confirm your change of status.

You have successfully configured Facebook as OAuth Provider for achieving Facebook login into your WordPress Site.

2. Setup WordPress as OAuth Client

• Go to the Configure OAuth tab in the Plugin and search for Facebook app in the applications list, and select the Facebook app.

• Then, configure App Name, Client ID, Client Secret and Endpoints.

• Please refer the below table for configuring the scope & endpoints for Facebook in the plugin.

Client ID :	Click Here
Client Secret :	Click Here
Scope:	public_profile email
Authorize Endpoint:	https://www.facebook.com/dialog/oauth
Access Token Endpoint:	https://graph.facebook.com/v2.8/oauth/access_token
Get User Info Endpoint:	https://graph.facebook.com/me/?fields=id,name,email,age_range,first_name,gender,last_name,link

• Click on Save Settings to save the configuration.

You have successfully configured WordPress as OAuth Client for achieving Facebook login into your WordPress Site.

3. User Attribute Mapping

• User Attribute Mapping is mandatory for enabling users to successfully login into WordPress. We will be setting up user profile attributes for WordPress using below settings.

Finding user attributes

• Go to Configure OAuth tab. Scroll down and click on Test Configuration.

• You will see all the values returned by your OAuth Provider to WordPress in a table. If you don't see value for First Name, Last Name, Email or Username, make the required settings in your OAuth Provider to return this information.

• Once you see all the values in Test Configuration, go to Attribute / Role Mapping tab, you will get the list of attributes in a Username dropdown.


4: Role Mapping [Premium]

• Click on “Test Configuration” and you will get the list of Attribute Names and Attribute Values that are sent by your OAuth provider.
• From the Test Configuration window, map the Attribute Names in the Attribute Mapping section of the plugin. Refer to the screenshot for more details.

• Enable Role Mapping: To enable Role Mapping, you need to map Group Name Attribute. Select the attribute name from the list of attributes which returns the roles from your provider application.
  Eg: Role


• Assign WordPress role to the Provider role: Based on your provider application, you can allocate the WordPress role to your provider roles. It can be a student, teacher, administrator or any other depending on your application. Add the provider roles under Group Attribute Value and assign the required WordPress role in front of it under WordPress Role.
  
  For example, in the below image. Teacher has been assigned the role of Administrator & Student is assigned the role of Subscriber.

• Once you save the mapping, the provider role will be assigned the WordPress administrator role after SSO.
  Example: As per the given example, Users with role ‘teacher’ will be added as Administrator in WordPress and ‘student’ will be added as Subscriber.

5. Sign In Settings

• The settings in Single Sign-On (SSO) Settings tab define the user experience for Single Sign-On (SSO). To add a Okta login widget on your WordPress page, you need to follow the below steps.

Sign in settings for WordPress 5.7 and before

• Go to WordPress Left Panel > Appearances > Widgets.
• Select miniOrange OAuth. Drag and drop to your favourite location and save.


Sign in settings for WordPress 5.8

• Go to WordPress Left Panel > Appearances > Widgets.
• Select miniOrange OAuth. Drag and drop to your favourite location and save.

• Open your WordPress page and you can see the Okta SSO login button there. You can test the Okta Single Sign-On (SSO) now.

Sign in settings for WordPress 5.9

• Make sure the "Show on login page" option is enabled for your application. (Refer to the below image)

• Now, go to your WordPress Login page. (Eg. https://< your-wordpress-domain >/wp-login.php)
• You will see an Okta SSO login button there. Once you click the login button, you will be able to test the Okta Single Sign-On (SSO).