Chapter 3. Securing a sample application

Now that you have an admin account, a realm, and a user, you can use Red Hat Single Sign-On to secure a sample JBoss EAP servlet application. You install a JBoss EAP client adapter, register the application in the admin console, modify the JBoss EAP instance to work with Red Hat Single Sign-On, and use Red Hat Single Sign-On with some sample code to secure the application.

Prerequisites

You need to adjust the port used by Red Hat Single Sign-On to avoid port conflicts with JBoss EAP.

3.1. Adjusting the port used by Red Hat Single Sign-On

The instructions in this guide apply to running JBoss EAP on the same machine as the Red Hat Single Sign-On server. In this situation, even though JBoss EAP is bundled with Red Hat Single Sign-On, you cannot use JBoss EAP as an application container. You must run a separate JBoss EAP instance for your servlet application.

To avoid port conflicts, you need different ports to run Red Hat Single Sign-On and JBoss EAP.

Prerequisites

You have an admin account for the admin console.
You created a demo realm.
You created a user in the demo realm.

Procedure

Download JBoss EAP 7.3 from the Red Hat customer portal.
Unzip the downloaded JBoss EAP.
```
$ unzip <filename>.zip
```
Change to the Red Hat Single Sign-On root directory.
Start the Red Hat Single Sign-On server by supplying a value for the jboss.socket.binding.port-offset system property. This value is added to the base value of every port opened by the Red Hat Single Sign-On server. In this example, 100 is the value.
Linux/Unix
```
$ cd bin
$ ./standalone.sh -Djboss.socket.binding.port-offset=100
```
Windows
```
> ...\bin\standalone.bat -Djboss.socket.binding.port-offset=100
```
Windows Powershell
```
> ...\bin\standalone.bat -D"jboss.socket.binding.port-offset=100"
```
Confirm that the Red Hat Single Sign-On server is running. Go to http://localhost:8180/auth/admin/ .
If the admin console opens, you are ready to install a client adapter that enables JBoss EAP to work with Red Hat Single Sign-On.

3.2. Installing the JBoss EAP client adapter

When JBoss EAP and Red Hat Single Sign-On are installed on the same machine, JBoss EAP requires some modification. To make this modification, you install a Red Hat Single Sign-On client adapter.

Prerequisites

JBoss EAP is installed.
You have a backup of the ../standalone/configuration/standalone.xml file if you have customized this file.

Procedure

Download the Client Adapter for EAP 7 from the Red Hat customer portal.
Change to the root directory of JBoss EAP.
Unzip the downloaded client adapter in this directory. For example:
```
$ unzip <filename>.zip
```
Change to the bin directory.
```
$ cd bin
```
Run the appropriate script for your platform.
Note
If you receive a file not found, make sure that you used unzip in the previous step. This method of extraction installs the files in the right place.
Linux/Unix
```
$ ./jboss-cli.sh --file=adapter-elytron-install-offline.cli
```
Windows
```
> jboss-cli.bat --file=adapter-elytron-install-offline.cli
```
Note
This script makes the necessary edits to the …/standalone/configuration/standalone.xml file.
Start the application server.
Linux/Unix
```
$ ./standalone.sh
```
Windows
```
> ...\standalone.bat
```

3.3. Registering the JBoss EAP application

You can now define and register the client in the Red Hat Single Sign-On admin console.

Prerequisites

You installed a client adapter to work with JBoss EAP.

Procedure

Log in to the admin console with your admin account: http://localhost:8180/auth/admin/
In the top left drop-down list, select the Demo realm.
Click Clients in the left side menu to open the Clients page.
Clients
On the right side, click Create.
On the Add Client dialog, create a client called vanilla by completing the fields as shown below:
Add Client
Click Save.
On the Vanilla client page that appears, click the Installation tab.
Select Keycloak OIDC JSON to generate a file that you need in a later procedure.
Keycloak.json file
Click Download to save Keycloak.json in a location that you can find later.
Select Keycloak OIDC JBoss Subsystem XML to generate an XML template.
Template XML
Click Download to save a copy for use in the next procedure, which involves JBoss EAP configuration.

3.4. Modifying the JBoss EAP instance

The JBoss EAP servlet application requires additional configuration before it is secured by Red Hat Single Sign-On.

Prerequisites

You created a client named vanilla in the demo realm.
You saved a template XML file for this client.

Procedure

Go to the standalone/configuration directory in your JBoss EAP root directory.
Open the standalone.xml file and search for the following text:
```
<subsystem xmlns="urn:jboss:domain:keycloak:1.1"/>
```
Change the XML entry from self-closing to using a pair of opening and closing tags as shown here:
```
<subsystem xmlns="urn:jboss:domain:keycloak:1.1">
</subsystem>
```

Paste the contents of the XML template within the <subsystem> element, as shown in this example:

<subsystem xmlns="urn:jboss:domain:keycloak:1.1">
  <secure-deployment name="WAR MODULE NAME.war">
    <realm>demo</realm>
    <auth-server-url>http://localhost:8180/auth</auth-server-url>
    <public-client>true</public-client>
    <ssl-required>EXTERNAL</ssl-required>
    <resource>vanilla</resource>
  </secure-deployment>
</subsystem>

Change WAR MODULE NAME.war to vanilla.war:

<subsystem xmlns="urn:jboss:domain:keycloak:1.1">
  <secure-deployment name="vanilla.war">
  ...
</subsystem>

Reboot the application server.

3.5. Installing sample code to secure the application

The final procedure is to make this application secure by installing some sample code from the https://github.com/redhat-developer/redhat-sso-quickstarts repository. The quickstarts work with the most recent Red Hat Single Sign-On release.

The sample code is the app-profile-jee-vanilla quickstart. It demonstrates how to change a Jakarta EE application that is secured with basic authentication without changing the WAR. The Red Hat Single Sign-On client adapter subsystem changes the authentication method and injects the configuration.

Prerequisites

You have the following installed on your machine and available in your PATH.

Java JDK 8
Apache Maven 3.1.1 or higher
Git

You have a keycloak.json file.

Procedure

Make sure your JBoss EAP application server is started.

Download the code and change directories using the following commands.

$ git clone https://github.com/redhat-developer/redhat-sso-quickstarts
$ cd redhat-sso-quickstarts/app-profile-jee-vanilla/config

Copy the keycloak.json file to the current directory.
Move one level up to the app-profile-jee-vanilla directory.
Install the code using the following command.
```
$ mvn clean wildfly:deploy
```
Confirm that the application installation succeeded. Go to http://localhost:8080/vanilla where a login page is displayed.
Login page confirming success
Log in using the account that you created in the demo realm.
Login page to demo realm

A message appears indicating you have completed a successful use of Red Hat Single Sign-On to protect a sample JBoss EAP application. Congratulations!
Complete success

Chapter 3. Securing a sample application

3.1. Adjusting the port used by Red Hat Single Sign-On

3.2. Installing the JBoss EAP client adapter

3.3. Registering the JBoss EAP application

3.4. Modifying the JBoss EAP instance

3.5. Installing sample code to secure the application

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