IdentityServer4 Login in WordPress with IdentityServer4 SSO OAuth

Steps to configure IdentityServer4 Login into WordPress with Single Sign-On (SSO)

1. Setup IdentityServer4 as OAuth Provider

• Set up IdentityServer4 using guidelines provided here.
• From Configure OAuth tab in Oauth Client plugin, collect Redirect/Callback URL and enter it into your IdentityServer4.
• Copy your Client ID and Client Secret and save it on your miniOrange OAuth Client plugin Configuration.
• You have successfully completed your IdentityServer4 OAuth Server side configurations.
• In Plugin, Add Custom Application.
• Enter your app name and use the following information to fill the details.

You have successfully configured IdentityServer4 as OAuth Provider for achieving IdentityServer4 login into your WordPress Site. With IdentityServer4 SSO, you can authenticate your users with the IdentityServer4 OpenID Connect provider in WordPress.

2. Setup WordPress as OAuth Client

• Free
• Premium

• Go to Configure OAuth tab and click Add New Application to add a new client application into your website.

• Choose your Application from the list of OAuth / OpenID Connect Providers, here Identity Server

• After selecting the provider copy the Callback URL which needs to be configured in OAuth Provider's SSO application configuration.
• Enter the Client Credentials like Client ID & Client Secret which you will get from the Identity Server4 SSO application.
• Please refer the below table for configuring the scope & endpoints for IdentityServer4 in the plugin.

Note: Once you create the Identity Server4 account, you'll find the domain Url and you will need to add the same in the below.




Authorize Endpoint:	https://<your-domain>/connect/authorize
Access Token Endpoint:	https://<your-domain>/connect/token
Get User Info Endpoint:	https://<your-domain>/connect/userinfo
Custom redirect URL after logout[optional] :	https://<your-domain>/connect/endsession?id_token_hint=##id_token##&post_logout_redirect_uri=<redirect-url-after-logout>

• Click Next.

• Verify the configuration details and click on Finish to save the configuration.

You have successfully configured WordPress as OAuth Client for achieving IdentityServer4 login into your WordPress Site. With IdentityServer4 SSO, you can authenticate your users with the IdentityServer4 OpenID Connect provider in WordPress.

• Go to Configure OAuth tab and search your application name to add a new client application into your website, here Identity Server.

• Insert your Identity Server domain here and configure Client ID and Client Secret received from IdentityServer4's configuration and click Save Settings.

Note: Once you create the Identity Server4 account, you'll find the domain Url and you will need to add the same in the below endpoints.




Scope:	openid
Authorize Endpoint:	https://{your-identityserver-domain}/connect/authorize
Access Token Endpoint:	https://{your-identityserver-domain}/connect/token
Get User Info Endpoint:	https://{your-domain}/connect/introspect


• Choose your Grant Type from the list of options & Click on Save Settings to save the configuration.

You have successfully configured WordPress as OAuth Client for achieving IdentityServer4 login into your WordPress Site. With IdentityServer4 SSO, you can authenticate your users with the IdentityServer4 OpenID Connect provider in WordPress.

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. After that 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 IdentityServer4 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 IdentityServer4 SSO login button there. You can test the IdentityServer4 login in WordPress using Single Sign-On (SSO).

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 IdentityServer4 SSO login button there. Once you click the login button, you will be able to test the IdentityServer4 Single Sign-On (SSO).