rules:
- id: aws-sns-topic-unencrypted
  patterns:
  - pattern: |
      resource "aws_sns_topic" $ANYTHING {
        ...
      }
  - pattern-not-inside: |
      resource "aws_sns_topic" $ANYTHING {
        ...
        kms_master_key_id = ...
        ...
      }
  message: The AWS SNS topic is unencrypted. The SNS topic messages could be read
    if compromised. The AWS KMS encryption key protects topic contents. To create
    your own, create a aws_kms_key resource or use the ARN string of a key in your
    account.
  languages:
  - hcl
  severity: WARNING
  metadata:
    category: security
    technology:
    - terraform
    - aws
    owasp:
    - A03:2017 - Sensitive Data Exposure
    - A04:2021 - Insecure Design
    cwe:
    - 'CWE-311: Missing Encryption of Sensitive Data'
    references:
    - https://owasp.org/Top10/A04_2021-Insecure_Design
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW