This is a sample keycloak extension that provides the condition in the authentication flow to check whether the user has single sign-on (linked identity provider) configured. See the blog post for a detailed description.
Set the correct keycloak version in the pom.xml file.
<keycloak.version>20.0.5</keycloak.version>
To build the package, execute mvn package command, which creates target/deploy/authentication-extensions-module-0.1.jar package file.
To deploy the package to keycloak, place it in the /opt/keycloak/providers directory of the Keycloak and execute build or start command of Keycloak.
After deployment, the condition "Condition - SSO configured" becomes available in the conditions of the authentication flows in the Keycloak administration panel.