rules:
- id: gcp-spanner-database-encrypted-with-cmk
  patterns:
  - pattern: |
      resource "google_spanner_database" $ANYTHING {
        ...
      }
  - pattern-not-inside: |
      resource "google_spanner_database" $ANYTHING {
        ...
        encryption_config {
          ...
          kms_key_name = ...
          ...
        }
        ...
      }
  message: >-
    Ensure Spanner Database is encrypted with Customer Supplied Encryption Keys (CSEK)
  metadata:
    category: security
    technology:
    - terraform
    - gcp
    owasp:
    - A03:2017 - Sensitive Data Exposure
    cwe:
    - 'CWE-320: CWE CATEGORY: Key Management Errors'
    references:
    - https://owasp.org/Top10/A02_2021-Cryptographic_Failures
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW
  languages: [hcl]
  severity: WARNING