rules:
- id: keyvault-purge-enabled
  message: >-
    Key vault should have purge protection enabled
  patterns:
  - pattern: resource
  - pattern-not-inside: |
      resource "azurerm_key_vault" "..." {
      ...
       purge_protection_enabled = true
      ...
      }
  - pattern-either:
    - pattern-inside: |
        resource "azurerm_key_vault" "..." {
        ...
        }
    - pattern-inside: |
        resource "azurerm_key_vault" "..." {
        ...
          purge_protection_enabled = false
        ...
        }
  metadata:
    cwe:
    - 'CWE-693: Protection Mechanism Failure'
    category: security
    technology:
    - terraform
    - azure
    references:
    - https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/key_vault#purge_protection_enabled
    - https://docs.microsoft.com/en-us/azure/key-vault/general/soft-delete-overview#purge-protection
    subcategory:
    - vuln
    likelihood: MEDIUM
    impact: MEDIUM
    confidence: MEDIUM
  languages: [hcl]
  severity: WARNING