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ASP.NET SAML Single Sign-On (SSO) using Keycloak as IDP

ASP.NET SAML Single Sign-On (SSO) using Keycloak as IDP


ASP.NET SAML SP Single Sign-On (SSO) module gives the ability to enable SAML Single Sign-On for your ASP.NET applications. Using Single Sign-On you can use only one password to access your ASP.NET application and services. Our module is compatible with all the SAML compliant Identity providers. Here we will go through a step-by-step guide to configure Single Sign-On (SSO) between ASP.NET and Keycloak considering Keycloak as IdP.

Pre-requisites : Download And Installation

  • Download miniOrange ASP.NET SAML 2.0 Module.
  • To set up the module, extract the file asp.net-saml-sso-module-xxx.zip. You will find a DLL named miniorange-saml-sso.dll, a configuration file named saml.config and an integration.md file which contains steps for adding the module into your application.
  • Add miniorange-saml-sso.dll into your bin folder (where other DLL files for your application exist).
  • Register minorangesamlsso module in your application according to the steps provided in the file named integration.md.
  • Add the provided configuration file saml.config in the root directory of your application.
  • After integration, open your browser and browse the connector dashboard with the URL below:
    https://<your-application-base-url>/?ssoaction=config
  • If the registration page or login page pops up, you have successfully added the miniOrange SAML SSO connector to your application.
  • saml dll register
  • Register or log in with your account by clicking the Register button to configure the module.

Steps to configure Keycloak Single Sign-On (SSO) Login into ASP.NET

1. Add Keycloak in ASP.NET SAML Module

  • Go to Plugin settings section and Choose Keycloak from the list.
  • ASP.NET SAML Single Sign-On using Keycloak - search idp
  • You will see the Service Provider Settings option, where you will get the service provider metadata. You can have three options to provide the metadata to your IDP. Keep the metadata handy as it will be required later to configure step 2.
  • ASP.NET Single Sign-On using Keycloak as IDP - SAML SSO find metadata

2. Configure Keycloak as Identity Provider

  • In your Keycloak Admin console, select the realm that you want to use.
  • Click on Clients from the left menu and then click on Create button to create a new client/application.
  • ASP.NET Single Sign-On using Keycloak as IDP - Creating an APP
  • Enter SP-EntityID / Issuer as the Client ID from the "Service Provider Settings" Tab and select SAML as the Client Protocol.
  • ASP.NET Single Sign-On using Keycloak as IDP - Add Client
  • Now click on Save.
  • Configure Keycloak by providing the required details:
  • Client ID The SP-EntityID / Issuer from the plugin's Service Provider Metadata tab
    Name Provide a name for this client
    Description Provide a description
    Client Signature Required OFF
    Force POST Binding OFF
    Force Name ID Format OFF
    Name ID Format Email
    Root URL Leave empty or Provide Base URL from Service Provider Settings tab
    Valid Redirect URIs The ACS (Assertion Consumer Service) URL from the plugin's Service Provider Settings tab
    ASP.NET Single Sign-On using Keycloak as IDP - Settings ASP.NET Single Sign-On using Keycloak as IDP - Settings
  • Under Fine Grain SAML Endpoint Configuration, Enter the following details:
  • Assertion Consumer Service POST Binding URL The ACS (Assertion Consumer Service) URL from the plugin's Service Provider Settings tab
    Logout Service Redirect Binding URL (Optional) The Single Logout URL from the plugin's Service Provider Metadata tab
    ASP.NET Single Sign-On using Keycloak as IDP - SAML Endpoint Configuration
  • Click on Save.
  • In your Keycloak Admin console, select the realm that you want to use.
  • Click on Clients from the left menu and then click on Create Client button to create a new client/application.
  • ASP.NET Single Sign-On using Keycloak as IDP - Creating an APP
  • Select SAML as Client type, Enter SP-EntityID / Issuer as the Client ID from the "Service Provider Metadata" Tab,Enter Name of your application and enter Description.
  • ASP.NET Single Sign-On using Keycloak as IDP - Add Client
  • Now click on Save.
  • Configure Keycloak by providing the required details:
  • Client ID The SP-EntityID / Issuer from the plugin's Service Provider Metadata tab
    Name Provide a name for this client
    Description Provide a description
    Client Signature Required OFF
    Force POST Binding OFF
    Force Name ID Format OFF
    Name ID Format Email
    Root URL Leave empty or Provide Base URL from Service Provider Settings tab
    Valid Redirect URIs The ACS (Assertion Consumer Service) URLfrom the plugin's Service Provider Settings tab
    ASP.NET Single Sign-On using Keycloak as IDP - Keycloak Login - Settings ASP.NET Single Sign-On using Keycloak as IDP - Keycloak Login - Settings ASP.NET Single Sign-On using Keycloak as IDP - Keycloak Login - Settings
  • Now click on Save.
  • In Advanced tab,under Fine Grain SAML Endpoint Configuration, Enter the following details:
  • Assertion Consumer Service POST Binding URL The ACS (Assertion Consumer Service) URL from the plugin's Service Provider Settings tab
    Logout Service Redirect Binding URL (Optional) The Single Logout URL from the plugin's Service Provider Metadata tab
    ASP.NET Single Sign-On using Keycloak as IDP - Login SAML Endpoint Configuration
  • Click on Save.

3. Configure ASP.NET SAML Module as Service Provider

  • Go to the miniOrange ASP.NET SAML 2.0 SSO module and click on Upload IDP Metadata button.
  • ASP.NET SAML SSO with Keycloak as IDP, go to module
  • In the Metadata URL option, Paste the Metadata URL which you have copied from your IDP and click on Fetch Metadata button.
  • ASP.NET SAML SSO with Keycloak as IDP,: metadata url
  • Click Save to save your IDP details.
  • Keycloak  SAML SSO with Office 365 as IDP, : save button

4. User Attribute Mapping

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

  • Click on the Test Configuration button to test whether the SAML Configuration you’ve done is correct. On successful test configuration, you will get the different user attributes returned by your identity Provider in a test configuration table.
  • asp.net saml sso Keycloak  : test configuration settings
    asp.net saml sso Keycloak  : test configuration settings
  • Once you see all the values in test configuration table, click on Configure Attribute Mapping button.
  • asp.net saml sso Keycloak : attribute mapping
  • You will be redirected to the Attribute Mapping section where you can see that the user attribute as an autofield.
  • Note: All the mapped attributes will be stored in the session so that you can access them in your application.
  • Click on Save Attribute Mapping button.
  • asp.net saml sso Keycloak  : attribute mapping

6. Integration Code

  • You can also find the Integration code in the Integration Code tab in the module. Just copy-paste that code snippet wherever you want to access the user attributes.
  • Note: All the mapped attributes will be stored in the session so that you can access them in your application.
  • asp.net saml sso Keycloak : integration code

7. Login Settings

  • Use the following URL as a link in your application from where you want to perform SSO:
  • https://<your-application-base-url>/?ssoaction=login
  • For example you can use it as:
  • <a href="https://<your-application-base-url>/?ssoaction=login">Login</a>

8. Logout Settings

  • Use the following URL as a link in your application from where you want to perform SLO:
  • https://<your-application-base-url>/?ssoaction=logout
  • For example you can use it as:
  • <a href="https://<your-application-base-url>/?ssoaction=logout">Logout</a>

You can configure the DotNetNuke SAML 2.0 Single Sign-On (SSO) module with any Identity Provider such as ADFS, Azure AD, Bitium, centrify, G Suite, JBoss Keycloak, Okta, OneLogin, Salesforce, AWS Cognito, OpenAM, Oracle, PingFederate, PingOne, RSA SecureID, Shibboleth-2, Shibboleth-3, SimpleSAML, WSO2 or even with your own custom identity provider.


If you are looking to Single Sign-On into your sites with any SAML compliant Identity Provider then we have a separate solution for that. We do provide SSO solutions for the following:

Application LINK
SAML SSO into DotNetNuke (DNN) site Click here
SAML SSO into SiteFinity site Click here
SAML SSO into Umbraco site Click here

Additional Resources

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