In this post we will show how to configure Apache Syncope to use SAML SSO as an alternative to logging in using a username and password. We will use Apache CXF Fediz as the SAML SSO IdP. In addition, we will show how to achieve IdP-initiated SSO using Okta. Please also refer to this tutorial on achieving SAML SSO with Syncope and Shibboleth.
1) Logging in to Apache Syncope using SAML SSO
In this section, we will cover setting up Apache Syncope to re-direct to a third party IdP so that the user can enter their credentials. The next section will cover the IdP-initiated case.
1.a) Enable SAML SSO support in Apache Syncope
First we will configure Apache Syncope to enable SAML SSO support. Download and extract the most recent standalone distribution release of Apache Syncope (2.0.6 was used in this post). Start the embedded Apache Tomcat instance and then open a web browser and navigate to "http://localhost:9080/syncope-console", logging in as "admin" and "password".
Apache Syncope is configured with some sample data to show how it can be used. Click on "Users" and add a new user called "alice" by clicking on the subsequent "+" button. Specify a password for "alice" and then select the default values wherever possible (you will need to specify some required attributes, such as "surname"). Now in the left-hand column, click on "Extensions" and then "SAML 2.0 SP". Click on the "Service Provider" tab and then "Metadata". Save the resulting Metadata document, as it will be required to set up the SAML SSO IdP.
1.b) Set up the Apache CXF Fediz SAML SSO IdP
Next we will turn our attention to setting up the Apache CXF Fediz SAML SSO IdP. Download the most recent source release of Apache CXF Fediz (1.4.3 was used for this tutorial). Unzip the release and build it using maven ("mvn clean install -DskipTests"). In the meantime, download and extract the latest Apache Tomcat 8.5.x distribution (tested with 8.5.24). Once Fediz has finished building, copy all of the "IdP" wars (e.g. in fediz-1.4.3/apache-fediz/target/apache-fediz-1.4.3/apache-fediz-1.4.3/idp/war/fediz-*) to the Tomcat "webapps" directory.
There are a few configuration changes to be made to Apache Tomcat before starting it. Download the HSQLDB jar and copy it to the Tomcat "lib" directory. Next edit 'conf/server.xml' and configure TLS on port 8443:
The two keys referenced here can be obtained from 'apache-fediz/target/apache-fediz-1.4.3/apache-fediz-1.4.3/examples/samplekeys/' and should be copied to the root directory of Apache Tomcat. Tomcat can now be started.
Next we have to configure Apache CXF Fediz to support Apache Syncope as a "service" via SAML SSO. Edit 'webapps/fediz-idp/WEB-INF/classes/entities-realma.xml' and add the following configuration:
In addition, we need to make some changes to the "idp-realmA" bean in this file:
- Add a reference to this bean in the "applications" list: <ref bean="srv-syncope" />
- Change the "idpUrl" property to: https://localhost:8443/fediz-idp/saml
- Change the port for "stsUrl" from "9443" to "8443".
Now restart Apache Tomcat. Open a browser and save the Fediz metadata which is available at "http://localhost:8080/fediz-idp/metadata?protocol=saml", which we will require when configuring Apache Syncope.
1.c) Configure the Apache CXF Fediz IdP in Syncope
The final configuration step takes place in Apache Syncope again. In the "SAML 2.0 SP" configuration screen, click on the "Identity Providers" tab and click the "+" button and select the Fediz metadata that you saved in the previous step. Now logout and an additional login option can be seen:
Select the URL for the SAML SSO IdP and you will be redirected to Fediz. Select the IdP in realm "A" as the home realm and enter credentials of "alice/ecila" when prompted. You will be successfully authenticated to Fediz and redirected back to the Syncope admin console, where you will be logged in as the user "alice".
2) Using IdP-initiated SAML SSO
Instead of the user starting with the Syncope web console, being redirected to the IdP for authentication, and then redirected back to Syncope - it is possible instead to start from the IdP. In this section we will show how to configure Apache Syncope to support IdP-initiated SAML SSO using Okta.
2.a) Configuring a SAML application in Okta
The first step is to create an account at Okta and configure a SAML application. This process is mapped out at the following link. Follow the steps listed on this page with the following additional changes:
- Specify the following for the Single Sign On URL: http://localhost:9080/syncope-console/saml2sp/assertion-consumer
- Specify the following for the audience URL: http://localhost:9080/syncope-console/
- Specify the following for the default RelayState: idpInitiated
2.b) Configure Apache Syncope to support IdP-Initiated SAML SSO
Log on to the Apache Syncope admin console using the admin credentials, and add a new IdP Provider in the SAML 2.0 SP extension as before, using the Okta metadata file that you have saved in the previous section. Edit the metadata and select the 'Support Unsolicited Logins' checkbox. Save the metadata and make sure that the Okta user is also a valid user in Apache Syncope.
Now go back to the Okta console and click on the application you have configured for Apache Syncope. You should seemlessly be logged into the Apache Syncope admin console.