Control: GKE clusters client certificate authentication should be enabled

powerpipe control run gcp_compliance.control.kubernetes_cluster_client_certificate_authentication_enabled

powerpipe login
powerpipe control run gcp_compliance.control.kubernetes_cluster_client_certificate_authentication_enabled --share

select
  self_link resource,
  case
    when master_auth -> 'clusterCaCertificate' is not null or  master_auth -> 'clientKey' is not null then 'ok'
    else 'alarm'
  end as status,
  case
    when master_auth -> 'clusterCaCertificate' is not null or  master_auth -> 'clientKey' is not null then title || ' client certificate authentication enabled.'
    else title || ' client certificate authentication disabled.'
  end as reason
  
  , location as location, project as project
from
  gcp_kubernetes_cluster;