Control: GKE clusters client certificate authentication should be disabled

powerpipe control run terraform_gcp_compliance.control.kubernetes_cluster_client_certificate_authentication_disabled

powerpipe login
powerpipe control run terraform_gcp_compliance.control.kubernetes_cluster_client_certificate_authentication_disabled --share

select
  address as resource,
  case
    when (attributes_std -> 'master_auth' -> 'client_certificate_config' -> 'issue_client_certificate') is null then 'alarm'
    when (attributes_std -> 'master_auth' -> 'client_certificate_config' ->> 'issue_client_certificate') = 'false' then 'ok'
    else 'alarm'
  end as status,
  split_part(address, '.', 2) || case
    when (attributes_std -> 'master_auth' -> 'client_certificate_config' -> 'issue_client_certificate') is null then ' client certificate authentication not defined'
    when (attributes_std -> 'master_auth' -> 'client_certificate_config' ->> 'issue_client_certificate') = 'false' then ' client certificate authentication disabled'
    else ' client certificate authentication enabled'
  end || '.' reason
  
  , path || ':' || start_line
from
  terraform_resource
where
  type = 'google_container_cluster';