keycloak-scim/docbook/saml-adapter-docs/reference/en/en-US/modules/jboss-adapter.xml

<!--
  ~ Copyright 2016 Red Hat, Inc. and/or its affiliates
  ~ and other contributors as indicated by the @author tags.
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~ http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<chapter id="jboss-adapter">
    <title>JBoss/Wildfly Adapter</title>
    <para>
        To be able to secure WAR apps deployed on JBoss EAP 6.x or Wildfly, you must install and
        configure the Keycloak SAML Adapter Subsystem.  You then provide a keycloak
        config, <literal>/WEB-INF/keycloak-saml.xml</literal> file in your WAR and change the auth-method to KEYCLOAK-SAML within web.xml.
        Both methods are described in this section.
    </para>
    <section id="jboss-adapter-installation">
        <title>Adapter Installation</title>
    <para>
        SAML Adapters are no longer included with the appliance or war distribution.Each adapter is a separate download on
        the Keycloak download site.  They are also available as a maven artifact.
    </para>
    <para>
        Install on Wildfly 9 or 10:
<programlisting>
$ cd $WILDFLY_HOME
$ unzip keycloak-saml-wildfly-adapter-dist.zip
</programlisting>
    </para>
    <para>
        Install on JBoss EAP 6.x:
<programlisting>
$ cd $JBOSS_HOME
$ unzip keycloak-saml-eap6-adapter-dist.zip
</programlisting>
    </para>
    <para>
        This zip file creates new JBoss Modules specific to the Wildfly Keycloak SAML Adapter within your Wildfly distro.
    </para>
    <para>
        After adding the Keycloak modules, you must then enable the Keycloak SAML Subsystem within your app server's server configuration:
        <literal>domain.xml</literal> or <literal>standalone.xml</literal>.
    </para>
    <para>
        There is a CLI script that will help you modify your server configuration.  Start the server and run the script 
        from the server's bin directory:
<programlisting>
$ cd $JBOSS_HOME/bin
$ jboss-cli.sh -c --file=adapter-install-saml.cli
</programlisting>
        The script will add the extension, subsystem, and optional security-domain as described below.
    </para>
    <para>
<programlisting><![CDATA[
<server xmlns="urn:jboss:domain:1.4">

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

    <profile>
        <subsystem xmlns="urn:jboss:domain:keycloak-saml:1.1"/>
         ...
    </profile>
]]>
</programlisting>
    </para>
        <para>
            The keycloak security domain should be used with EJBs and other components when you need the security context created
            in the secured web tier to be propagated to the EJBs (other EE component) you are invoking.  Otherwise
            this configuration is optional.
        </para>
<programlisting><![CDATA[
<server xmlns="urn:jboss:domain:1.4">
 <subsystem xmlns="urn:jboss:domain:security:1.2">
    <security-domains>
...
      <security-domain name="keycloak">
         <authentication>
           <login-module code="org.keycloak.adapters.jboss.KeycloakLoginModule"
                         flag="required"/>
          </authentication>
      </security-domain>
    </security-domains>
]]>
</programlisting>
        <para>
            For example, if you have a JAX-RS service that is an EJB within your WEB-INF/classes directory, you'll want
            to annotate it with the @SecurityDomain annotation as follows:
        </para>
<programlisting><![CDATA[
import org.jboss.ejb3.annotation.SecurityDomain;
import org.jboss.resteasy.annotations.cache.NoCache;

import javax.annotation.security.RolesAllowed;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import java.util.ArrayList;
import java.util.List;

@Path("customers")
@Stateless
@SecurityDomain("keycloak")
public class CustomerService {

    @EJB
    CustomerDB db;

    @GET
    @Produces("application/json")
    @NoCache
    @RolesAllowed("db_user")
    public List<String> getCustomers() {
        return db.getCustomers();
    }
}
]]>
</programlisting>
        <para>
            We hope to improve our integration in the future so that you don't have to specify the @SecurityDomain
            annotation when you want to propagate a keycloak security context to the EJB tier.
        </para>

    </section>
    <section>
        <title>Required Per WAR Configuration</title>
        <para>
            This section describes how to secure a WAR directly by adding config and editing files within your WAR package.
        </para>
        <para>
            The first thing you must do is create
            a <literal>keycloak-saml.xml</literal> adapter config file within the <literal>WEB-INF</literal> directory
            of your WAR.  The format of this config file is describe in the <link linkend='adapter-config'>general adapter configuration</link>
            section.
        </para>
        <para>
            Next you must set the <literal>auth-method</literal> to <literal>KEYCLOAK-SAML</literal> in <literal>web.xml</literal>.  You also
            have to use standard servlet security to specify role-base constraints on your URLs.  Here's an example
            pulled from one of the examples that comes distributed with Keycloak.
        </para>
        <para>
<programlisting>
<![CDATA[
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
      version="3.0">

	<module-name>customer-portal</module-name>

    <security-constraint>
        <web-resource-collection>
            <web-resource-name>Admins</web-resource-name>
            <url-pattern>/admin/*</url-pattern>
        </web-resource-collection>
        <auth-constraint>
            <role-name>admin</role-name>
        </auth-constraint>
        <user-data-constraint>
            <transport-guarantee>CONFIDENTIAL</transport-guarantee>
        </user-data-constraint>
    </security-constraint>
    <security-constraint>
        <web-resource-collection>
            <web-resource-name>Customers</web-resource-name>
            <url-pattern>/customers/*</url-pattern>
        </web-resource-collection>
        <auth-constraint>
            <role-name>user</role-name>
        </auth-constraint>
        <user-data-constraint>
            <transport-guarantee>CONFIDENTIAL</transport-guarantee>
        </user-data-constraint>
    </security-constraint>

    <login-config>
        <auth-method>KEYCLOAK-SAML</auth-method>
        <realm-name>this is ignored currently</realm-name>
    </login-config>

    <security-role>
        <role-name>admin</role-name>
    </security-role>
    <security-role>
        <role-name>user</role-name>
    </security-role>
</web-app>
]]>
</programlisting>
        </para>
    </section>
    <section>
        <title>Securing WARs via Keycloak SAML Subsystem</title>
        <para>
            You do not have to crack open a WAR to secure it with Keycloak.  Alternatively, you can externally secure
            it via the Keycloak SAML Adapter Subsystem.  While you don't have to specify KEYCLOAK-SAML as an <literal>auth-method</literal>,
            you still have to define the <literal>security-constraints</literal> in <literal>web.xml</literal>.  You do
            not, however, have to create a <literal>WEB-INF/keycloak-saml.xml</literal> file.  This metadata is instead defined
            within XML in your server's <literal>domain.xml</literal> or <literal>standalone.xml</literal> subsystem
            configuration section.
        </para>
        <para>
            <programlisting><![CDATA[
<extensions>
  <extension module="org.keycloak.keycloak-saml-adapter-subsystem"/>
</extensions>

<profile>
  <subsystem xmlns="urn:jboss:domain:keycloak-saml:1.1">
    <secure-deployment name="WAR MODULE NAME.war">
      <SP entityID="APPLICATION URL">
        ...
      </SP>
    </secure-deployment>
  </subsystem>
</profile>
]]>
            </programlisting>
        </para>
        <para>
            The <literal>secure-deployment</literal> <literal>name</literal> attribute identifies the WAR you want
            to secure.  Its value is the <literal>module-name</literal> defined in <literal>web.xml</literal> with
            <literal>.war</literal> appended.  The rest of the configuration uses the same XML syntax as
            <literal>keycloak-saml.xml</literal> configuration defined in <link linkend='adapter-config'>general adapter configuration</link>.
        </para>
        <para>
            An example configuration:
        </para>
        <para>
            <programlisting><![CDATA[
<subsystem xmlns="urn:jboss:domain:keycloak-saml:1.1">
  <secure-deployment name="saml-post-encryption.war">
    <SP entityID="http://localhost:8080/sales-post-enc/"
        sslPolicy="EXTERNAL"
        nameIDPolicyFormat="urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified"
        logoutPage="/logout.jsp"
        forceAuthentication="false">
      <Keys>
        <Key signing="true" encryption="true">
          <KeyStore resource="/WEB-INF/keystore.jks" password="store123">
            <PrivateKey alias="http://localhost:8080/sales-post-enc/" password="test123"/>
            <Certificate alias="http://localhost:8080/sales-post-enc/"/>
          </KeyStore>
        </Key>
      </Keys>
      <PrincipalNameMapping policy="FROM_NAME_ID"/>
      <RoleIdentifiers>
        <Attribute name="Role"/>
      </RoleIdentifiers>
      <IDP entityID="idp">
        <SingleSignOnService signRequest="true"
            validateResponseSignature="true"
            requestBinding="POST"
            bindingUrl="http://localhost:8080/auth/realms/saml-demo/protocol/saml"/>

        <SingleLogoutService
            validateRequestSignature="true"
            validateResponseSignature="true"
            signRequest="true"
            signResponse="true"
            requestBinding="POST"
            responseBinding="POST"
            postBindingUrl="http://localhost:8080/auth/realms/saml-demo/protocol/saml"
            redirectBindingUrl="http://localhost:8080/auth/realms/saml-demo/protocol/saml"/>
        <Keys>
          <Key signing="true" >
            <KeyStore resource="/WEB-INF/keystore.jks" password="store123">
              <Certificate alias="saml-demo"/>
            </KeyStore>
          </Key>
        </Keys>
      </IDP>
    </SP>
   </secure-deployment>
</subsystem>
]]>
            </programlisting>
        </para>
    </section>
</chapter>