Configuration Authentication UI

Purpose

Use this skill for ui blocks inside authentication portal <name> blocks.

Read these files when details matter:

• caddyfile_authn_ui.go for accepted Caddyfile UI syntax.
• ../go-authcrunch/pkg/authn/ui/params.go for authcrunch UI parameters.
• ../go-authcrunch/pkg/authn/portal.go for UI defaults, template loading, static assets, theme and language validation.
• ../go-authcrunch/pkg/authn/ui/static.go for static asset loading and content-type handling.

Use configuration-authentication for the surrounding portal and configuration-authentication-user-transforms for ui link entries emitted by user transforms.

Supported UI Forms

The Caddyfile ui parser supports templates, metadata, private links, static assets, themes, languages, logos, auto_redirect_url, and custom CSS, JavaScript, or HTML-header injection. Use parser-supported forms:

authentication portal myportal {
	ui {
		theme basic
		language en
		meta title "Example Authentication Portal"
		meta author "Example"
		meta description "Example sign-in portal"
		template login ui/login.template
		static_asset "assets/images/logo.png" "images/png" ui/logo.png
		logo url "/auth/assets/images/logo.png"
		logo description "Example"
		auto_redirect_url /auth/portal
		links {
			"My Identity" "/auth/whoami" icon "las la-user"
			"Docs" "https://docs.example.com/" target_blank
		}
	}
}

links entries use a title as the subdirective token and require a target URL. Optional keys are target_blank, icon <class>, and disabled.

Custom Assets

static_asset URIs must start with assets/; the content type is passed through as provided, and authcrunch loads the file from the filesystem path:

static_asset "assets/images/banner.jpg" "images/jpg" ui/banner.jpg

Custom CSS and JavaScript are registered at fixed asset paths:

custom css path ui/custom.css
custom js path ui/custom.js

These become assets/css/custom.css and assets/js/custom.js. custom html header path <path> injects file content into the built-in templates immediately in the parser path.

Do not invent UI directives from authcrunch struct fields unless caddyfile_authn_ui.go parses them. The Caddyfile parser does not currently support a top-level ui title or allow settings for role subdirective.

Languages

Use language <id> inside the ui block for portal localization:

ui {
	language fr
}

The supported language set and message keys come from local go-authcrunch translation data, especially pkg/translate/data/messages.json. Check that file when validating whether a language or message is available; do not infer support from screenshots alone.

Client Integration Patterns

Custom JavaScript can implement post-login behavior that auto_redirect_url cannot express, such as calling /whoami, checking the referrer from a /sandbox/ path, inspecting roles, and redirecting users to a role-specific dashboard. Treat such scripts as application code: review same-origin assumptions, JSON Accept headers, role checks, and failure behavior.

Fixtures

Use this fixture as the main example:

• testdata/caddyfile_adapt/testcase_authenticate_with_ui.Caddyfile