Static Themes

CAS is configured to decorate views based on the theme property of a given registered service in the Service Registry. The theme that is activated via this method will still preserve the default views for CAS but will apply decorations such as CSS and Javascript to the views. The physical structure of views cannot be modified via this method.

The following settings and properties are available from the CAS configuration catalog:

The configuration settings listed below are tagged as Required in the CAS configuration metadata. This flag indicates that the presence of the setting may be needed to activate or affect the behavior of the CAS feature and generally should be reviewed, possibly owned and adjusted. If the setting is assigned a default value, you do not need to strictly put the setting in your copy of the configuration, but should review it nonetheless to make sure it matches your deployment expectations.

The configuration settings listed below are tagged as Optional in the CAS configuration metadata. This flag indicates that the presence of the setting is not immediately necessary in the end-user CAS configuration, because a default value is assigned or the activation of the feature is not conditionally controlled by the setting value. In other words, you should only include this field in your configuration if you need to modify the default value or if you need to turn on the feature controlled by the setting.

  • cas.theme.default-theme-name=cas-theme-default
  • The default theme name of this CAS deployment. The default theme file can be modified and extended by the theme file

    How can I configure this property?

  • cas.theme.param-name=theme
  • The parameter name used to switch themes.

    How can I configure this property?

  • The name of this theme used in various titles/captions.

    How can I configure this property?

  • cas.theme.description=
  • The description for this theme to describe its purpose

    How can I configure this property?

    Configuration Metadata

    The collection of configuration properties listed in this section are automatically generated from the CAS source and components that contain the actual field definitions, types, descriptions, modules, etc. This metadata may not always be 100% accurate, or could be lacking details and sufficient explanations.

    Be Selective

    This section is meant as a guide only. Do NOT copy/paste the entire collection of settings into your CAS configuration; rather pick only the properties that you need. Do NOT enable settings unless you are certain of their purpose and do NOT copy settings into your configuration only to keep them as reference. All these ideas lead to upgrade headaches, maintenance nightmares and premature aging.


    Note that for nearly ALL use cases, declaring and configuring properties listed here is sufficient. You should NOT have to explicitly massage a CAS XML/Java/etc configuration file to design an authentication handler, create attribute release policies, etc. CAS at runtime will auto-configure all required changes for you. If you are unsure about the meaning of a given CAS setting, do NOT turn it on without hesitation. Review the codebase or better yet, ask questions to clarify the intended behavior.

    Naming Convention

    Property names can be specified in very relaxed terms. For instance cas.someProperty, cas.some-property, cas.some_property are all valid names. While all forms are accepted by CAS, there are certain components (in CAS and other frameworks used) whose activation at runtime is conditional on a property value, where this property is required to have been specified in CAS configuration using kebab case. This is both true for properties that are owned by CAS as well as those that might be presented to the system via an external library or framework such as Spring Boot, etc.

    :information_source: Note

    When possible, properties should be stored in lower-case kebab format, such as The only possible exception to this rule is when naming actuator endpoints; The name of the actuator endpoints (i.e. ssoSessions) MUST remain in camelCase mode.

    Settings and properties that are controlled by the CAS platform directly always begin with the prefix cas. All other settings are controlled and provided to CAS via other underlying frameworks and may have their own schemas and syntax. BE CAREFUL with the distinction. Unrecognized properties are rejected by CAS and/or frameworks upon which CAS depends. This means if you somehow misspell a property definition or fail to adhere to the dot-notation syntax and such, your setting is entirely refused by CAS and likely the feature it controls will never be activated in the way you intend.


    Configuration properties are automatically validated on CAS startup to report issues with configuration binding, specially if defined CAS settings cannot be recognized or validated by the configuration schema. Additional validation processes are also handled via Configuration Metadata and property migrations applied automatically on startup by Spring Boot and family.

    Indexed Settings

    CAS settings able to accept multiple values are typically documented with an index, such as cas.some.setting[0]=value. The index [0] is meant to be incremented by the adopter to allow for distinct multiple configuration blocks.

    To create a theme, please follow the below instructions:

    • Add a [theme_name].properties placed to the root of src/main/resources folder. Contents of this file may contain the following settings:
    Setting Description Value
    cas.standard.css.file Path to theme CSS file; Multiple files may be comma-separated. /themes/[theme_name]/css/cas.css
    cas.standard.js.file Path to theme Javascript file; Multiple files may be comma-separated. /themes/[theme_name]/js/js/css
    cas.standard.fragments.head Names of fragments found in custom.html fragment, included in the layout <head> tag Blank
    cas.logo.file Path to theme logo to display via the common layout. /images/logo.png
    cas.drawer-menu.enabled Decide whether drawer menu should be displayed. true Theme name used in various titles/captions. Example Theme
    cas.theme.description Theme description used in various titles/captions. Example Theme Description Whether password management/reset links should be displayed. true
    cas.login-form.enabled When the CAS login form should be displayed. true
    cas.notifications-menu.enabled Enable and display the notifications menu. true
    cas.favicon.file Path to theme favicon file. /themes/example/images/favicon.ico
    cas.hero-banner.file Path to a “hero” styled image/logo on the login form. /themes/example/images/hero.png
    cas.js.core.enabled Whether core/default Javascript libraries should be included. true
    cas.css.core.enabled=true Whether core/default CSS libraries should be included. true
    cas.successful-login.display-attributes Whether attributes/applications should be displayed on login. true
    cas.public-workstation.enabled Whether user can indicate a public workstation option on login. false
    cas.warn-on-redirect.enabled Whether user should be warned prior to redirects to applications. false Whether to display progress when reading/writing browser storage data. true Whether to display the CAS footer. true
    • Create the directory src/main/resources/static/themes/[theme_name]. Put the theme-specific cas.css and cas.js inside the appropriate directories for css and js.
    • Specify [theme_name] for the service definition under the theme property.
      "@class" : "",
      "serviceId" : "^",
      "name" : "MyTheme",
      "theme" : "[theme_name]",
      "id" : 1000

    Values can use the Spring Expression Language syntax.