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Keycloak Broker: Brokering a Keycloak SAML v2 Identity Provider Quickstart

What is it?

This example demonstrates how to broker a SAML Identity Provider in Keycloak. In this case, the SAML Identity Provider belongs to a different realm than the application and we want to trust users from one realm to authenticate and access the applications in another realm.

There are two main realms in this example:

saml-broker-realm.json: the realm where the user belongs and that provides a SAML v2 Identity Provider.
saml-broker-authentication-realm.json: the realm with all the necessary configuration to set up the application and the identity provider responsible for brokering.

From this example you'll understand how to set up an identity provider in order to broker an external SAML identity provider and allow users from different domains/realms to authenticate and access applications in a realm.

The saml-broker-realm realm provides two important configuration. The first one is the user that we are going to use to authenticate with the SAML Identity Provider.

{
    "username" : "user",
    "enabled": true,
    "email" : "user@saml-broker-realm",
    "firstName": "User",
    "lastName": "SAML",
    "credentials" : [
        { "type" : "password",
            "value" : "password" }
    ]
}

The second one is an application to configure a SAML Identity Provider to authenticate requests from the other realm.

{
    "name": "http://localhost:8080/auth/",
    "enabled": true,
    "redirectUris": [
      "http://localhost:8080/auth/broker/saml-broker-authentication-realm/saml-identity-provider"
    ],
  "attributes": {
    "saml.assertion.signature": "true",
    "saml.server.signature": "true",
    "saml.signature.algorithm": "RSA_SHA256",
    "saml.client.signature": "true",
    "saml.authnstatement": "true",
    "saml.signing.private.key": "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",
    "saml.signing.certificate": "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"
  }
}

The saml-broker-authentication-realm.json realm provides the configuration for the application and also the necessary configuration to set up an identity provider to broker the SAML Identity Provider from the other realm.

{
  "id" : "saml-identity-provider",
  "providerId" : "saml",
  "name" : "SAML v2 Identity Provider",
  "enabled": true,
  "updateProfileFirstLogin" : "true",
  "storeToken" : "true",
  "addReadTokenRoleOnCreate": true,
  "config": {
      "singleSignOnServiceUrl": "http://localhost:8080/auth/realms/saml-broker-realm/protocol/saml",
      "singleLogoutServiceUrl": "http://localhost:8080/auth/realms/saml-broker-realm/protocol/saml",
      "nameIDPolicyFormat": "urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress",
      "signingCertificate": "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",
      "wantAuthnRequestsSigned": true,
      "forceAuthn": true,
      "validateSignature": true,
      "postBindingResponse": true,
      "postBindingAuthnRequest": true
  }
}

Basically, once you try to access the application for the first time, you'll be redirected to saml-broker-authentication-realm's login page. In this page you'll note that there is a "SAML v2 Identity Provider" button that allows you to authenticate with the SAML Identity Provider in saml-broker-realm realm.

After clicking that button, you'll be redirected to saml-broker-realm's login page from where you must authenticate using the credentials for the default user:

Username: user
Password: password

If everything is fine, the saml-broker-realm realm will redirect you back to saml-broker-authentication-realm and at this point you'll be asked to provide some basic profile information in order to create a new user in saml-broker-authentication-realm based on the information returned by the SAML Identity Provider. Once you update your profile, you'll be authenticated and redirected to the application.

At the end, the user user is now federated and can access the application in saml-broker-authentication-realm realm.

Import the necessary realms

Next thing you have to do is import the test realm for the demo. Clicking on the below link will bring you to the create realm page in the Admin UI. The username/password is admin/admin to login in. Keycloak will ask you to create a new admin password before you can go to the create realm page.

http://localhost:8080/auth/admin/master/console/#/create/realm

Import the following realms:

saml-broker-authentication-realm.json
saml-broker-realm.json

Make sure you've set up the Keycloak Server

The Keycloak Appliance Distribution comes with a preconfigured Keycloak server (based on Wildfly). You can use it out of the box to run these demos. So, if you're using this, you can head to Step 2.

Alternatively, you can install the Keycloak Server onto any EAP 6.x, or Wildfly 8.x server, but there is a few steps you must follow.

Obtain latest keycloak-war-dist-all.zip. This distro is used to install Keycloak onto an existing JBoss installation. This installs the server.

$ cd ${wildfly.jboss.home}/standalone
$ cp -r ${keycloak-war-dist-all}/deployments .

To be able to run the demos you also need to install the Keycloak client adapter. For Wildfly:

$ cd ${wildfly.home}
$ unzip ${keycloak-war-dist-all}/adapters/keycloak-wildfly-adapter-dist.zip

For JBoss EAP 6.x

$ cd ${eap.home}
$ unzip ${keycloak-war-dist-all}/adapters/keycloak-eap6-adapter-dist.zip

For JBoss AS 7.1.1:

$ cd ${as7.home}
$ unzip ${keycloak-war-dist-all}/adapters/keycloak-as7-adapter-dist.zip

Unzipping the adapter ZIP only installs the JAR files. You must also add the Keycloak Subsystem to the server's configuration (standalone/configuration/standalone.xml).

<server xmlns="urn:jboss:domain:1.4">

    <extensions>
        <extension module="org.keycloak.keycloak-subsystem"/>
        ...
    </extensions>

    <profile>
        <subsystem xmlns="urn:jboss:domain:keycloak:1.0"/>
        ...
    </profile>

Boot Keycloak Server

Where you go to start up the Keycloak Server depends on which distro you installed.

From appliance:

$ cd keycloak/bin
$ ./standalone.sh

From existing Wildfly/EAP6/AS7 distro

$ cd ${wildfly.jboss.home}/bin
$ ./standalone.sh

Start JBoss Enterprise Application Platform 6 or WildFly with the Web Profile

Open a command line and navigate to the root of the JBoss server directory.

The following shows the command line to start the server with the web profile:

 For Linux:   JBOSS_HOME/bin/standalone.sh
 For Windows: JBOSS_HOME\bin\standalone.bat

Build and Deploy the Quickstart

NOTE: The following build command assumes you have configured your Maven user settings. If you have not, you must include Maven setting arguments on the command line. See Build and Deploy the Quickstarts for complete instructions and additional options.

Make sure you have started the JBoss Server as described above.
Open a command line and navigate to the root directory of this quickstart.

Type this command to build and deploy the archive:

 For EAP 6:     mvn clean package jboss-as:deploy
 For WildFly:   mvn clean package wildfly:deploy

This will deploy target/saml-broker-authentication.war to the running instance of the server.

Access the application

The application will be running at the following URL: http://localhost:8080/saml-broker-authentication.

Undeploy the Archive

Make sure you have started the JBoss Server as described above.
Open a command line and navigate to the root directory of this quickstart.

When you are finished testing, type this command to undeploy the archive:

 For EAP 6:     mvn jboss-as:undeploy
 For WildFly:   mvn -Pwildfly wildfly:undeploy

Debug the Application

If you want to debug the source code or look at the Javadocs of any library in the project, run either of the following commands to pull them into your local repository. The IDE should then detect them.

    mvn dependency:sources
    mvn dependency:resolve -Dclassifier=javadoc

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