Elytron: A New Security Framework in WildFly/JBoss EAP
Elytron is a new security framework that ships with WildFly version 10 and Red Hat JBoss Enterprise Application Platform (EAP) 7.1. This project is a complete replacement of PicketBox and JAAS. Elytron is a single security framework that will be usable for securing management access to the server and for securing applications deployed in WildFly. You can still use the legacy security framework, which is PicketBox, but it is a deprecated module; hence, there is no guarantee that PicketBox will be included in future releases of WildFly. In this article, we will explore the components of Elytron and how to configure them in Wildfly.
The Elytron project covers the following:
- Secure credential storage
In this article, we are going to explore using SSL/TLS in WildFly with Elytron.
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This is the basic architecture of SSL/TLS in Elytron:
The key attribute here is
SSLContext, which also has the reference the following component:
- Key-Manager: key-manager keeps the reference of key-store to be used and load the keys.
- Trust-Manager: This also keeps the reference of key-store, basically used for
trustCertificates. If all the certificates are present in the keystore referenced by key-manager, configuring trust-manager is not required. However, for outbound connections, a trust-manager can be used.
- Security-Domain: This is an optional parameter, However, if
SSLContextis configured with a reference to a security-domain, then the verification of a client’s certificate can be performed as an authentication, thus ensuring the appropriate permissions for a login are assigned before even allowing the connection to be fully opened.
SSLContext also defines the type of SSL communication (one-way/two-way) along with allowed protocol and cipher-suite details.
Configure the SSLContext to Be Used by the Management Interface and the Undertow Subsytem
Before, we start configuring SSL/TLS in Elytron, we should have a certificate. In this tutorial, we will create a self-signed certificate to understand how SSL/TLS works in Elytron.
To manage the certificate/keystore, I have used here
keytool CLI-based utility that ships with Java. However, one can manage the certificate/keystore using another utility, such as Portecle, which allows to manage the keystore/certificate graphically and does not require to remember long command lines.
keytool to generate the keystore and a self-signed certificate, executing a command similar to the following in the OS terminal command line:
keytool -genkeypair -alias wildfly -keyalg RSA -sigalg SHA256withRSA -validity 365 -keysize 2048 -keypass jboss@123 -storepass jboss@123 -dname "CN=developer.jboss.org, C=IN" -ext san=dns:developers.redhat.org,dns:developers.wildfly.org -keystore wildfly.jks
Note: This is just an example, you need to change the common name (CN) and other attribute as per your organization requirement and set the password accordingly.
Once we are ready with the certificate/keystore, need to perform the following steps to configure the Elytron subsystem for enabling SSL/TLS. Here, I am demonstrating the configuration using the JBoss CLI.
- First, we need to connect to the JBoss CLI by executing the jboss-cli command available in the directory
- Next, configure a
key-storecomponent in the Elytron subsystem with the newly created keystore (here
wildfly.jksis placed at
- Then, create a new
key-managercomponent in the Elytron subsystem referencing the
key-storecomponent created above. To do this, need to execute the command like below:
Note: We are required to give the password (e.g. jboss@123) of keystore here while creating key-manager.
- Finally, configure a new
key-managercomponent created in the previous step:
To enable SSL/TLS through Elytron, we are required to execute the following two commands to configure the Undertow
https-listener and map the
ssl-context with Elytron. By default, the
https-listener is configured with the ApplicationRealm security realm, and by default, ApplicationRealm generates a self-signed certificate during the first startup of WildFly. You need to do batch execution, because both of the commands have to execute simultaneously, else you can remove the https-listener and add the https-listener again with ssl-context .
batch /subsystem=undertow/server=default-server/https-listener=https:undefine-attribute(name=security-realm) /subsystem=undertow/server=default-server/https-listener=https:write-attribute(name=ssl-context,value=wildlfySSC) run-batch
Now for the management interface to use the same
ssl-context, we need to execute the following commands in the JBoss CLI, which will also enable SSL for the management interface:
- Before, configuring
ssl-contextfor the management-interface, we need to configure
secure-portfor the management-http interface for communicating over SSL/TLS
- Map the same
ssl-contextwith management-http interface for enabling SSL/TLS
Now, to test your configuration and the SSL/TLS handshake, make a request over the HTTPS protocol using your browser. To do this, you can also use the
openssl command-line utility, for example:
openssl s_client -connect developers.redhat.com:8443
You can also use the SSL testing tool to check the certificate and the allowed protocol and ciphers. Once you have completed the setup, you can make your system live for the production usage.
There are couple of features in Elytron that were not there in earlier JBoss versions:
- Elytron prints a warning message in the log upon expiration of the certificate used in the Elytron subsystem.
- It is possible to load the certificate keystore without restarting/reloading the instance, although there are still some challenges.
- Elytron also provides the facility to check the certificate details.