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authentik/website/docs/policies/expression.md

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Expression Policies

:::note These variables are available in addition to the common variables/functions defined in Expressions :::

The passing of the policy is determined by the return value of the code. Use return True to pass a policy and return False to fail it.

Available Functions

ak_message(message: str)

Add a message, visible by the end user. This can be used to show the reason why they were denied.

Example:

ak_message("Access denied")
return False

Context variables

  • request: A PolicyRequest object, which has the following properties:

    • request.user: The current user, against which the policy is applied. (ref)
    • request.http_request: The Django HTTP Request. (ref)
    • request.obj: A Django Model instance. This is only set if the policy is ran against an object.
    • request.context: A dictionary with dynamic data. This depends on the origin of the execution.
  • geoip: geoip2.models.City object, which is added when GeoIP is enabled.

  • ak_is_sso_flow: Boolean which is true if request was initiated by authenticating through an external provider.

  • ak_client_ip: Client's IP Address or 255.255.255.255 if no IP Address could be extracted. Can be compared, for example

    return ak_client_ip in ip_network('10.0.0.0/24')
    

Additionally, when the policy is executed from a flow, every variable from the flow's current context is accessible under the context object.

This includes the following:

  • prompt_data: Data which has been saved from a prompt stage or an external source.
  • application: The application the user is in the process of authorizing.
  • pending_user: The currently pending user