无服务器，在aws上加密主题

Question

我正在在AWS上使用无服务器创建主题。一切正常，但是我想使用SSE加密主题。我如何完成这项工作。 yaml文件的格式应该是什么。到目前为止，我有

MyTopic:
  Type: AWS::SNS::Topic
  Properties:
    TopicName: MyTopic
MyTopicPolicy:
  Type: AWS::SNS::TopicPolicy
  Properties:
    Topics:
      - Ref: MyTopic
    PolicyDocument:
      Id: MyTopicPolicy
      Version: '2012-10-17'
      Statement:
        - Sid: AllowSubscribe
          Effect: Allow
          Principal:
            AWS: <ID>
          Action:
            - SNS:Subscribe            
          Resource: !Ref MyTopic

Answer 1

只需添加KmsMasterKeyId

MyTopic:
  Type: AWS::SNS::Topic
  Properties:
    TopicName: MyTopic
    KmsMasterKeyId: 1234abcd-12ab-34cd-56ef-1234567890ab

来源：AWS Cloudformation document

Answer 2

如上所述，建议您在SNS主题定义中引用KMS密钥。您可以将默认KMS密钥用于SNS（别名aws/sns），也可以创建自己的密钥

您可以在下面的CloudFormation中查看如何在同一模板中使用自己的KMS密钥创建加密主题和KMS密钥。密钥策略设置为允许通过整个AWS账户进行管理和使用，尽管您可能希望使用最低特权原则将其锁定，具体取决于您所处环境的安全要求。

---
AWSTemplateFormatVersion: '2010-09-09'
Description: Demo template for Encrypted SNS Topic

Resources:
  SNSKMSKey:
    Type: 'AWS::KMS::Key'
    Properties:
      Description: Demo KMS Key Policy
      Enabled: true
      EnableKeyRotation: true
      KeyPolicy:
        Version: 2012-10-17
        Id: KmsKeyPolicy
        Statement:
          - Sid: SimpleKeyPolicyAllowAccountAdmin
            Effect: Allow
            Principal:
              AWS: !Sub "arn:aws:iam::${AWS::AccountId}:root"
            Action:
              - 'kms:*'
            Resource: '*'
          - Sid: SimpleKeyPolicyAllowAccountUsage
            Effect: Allow
            Principal:
              AWS: !Sub "arn:aws:iam::${AWS::AccountId}:root"
            Action:
              - 'kms:Decrypt'
              - 'kms:Encrypt'
              - 'kms:GenerateDataKey*'
              - 'kms:DescribeKey'
            Resource: '*'


  SNSKmeKeyAlias:
    Type: "AWS::KMS::Alias"
    Properties:
      AliasName: !Sub "alias/${AWS::StackName}-SNSEncryptionKey"
      TargetKeyId: !Ref SNSKMSKey

  # -- Encrypted  SNS Topic -- #
  EncryptedSNSTopic:
    Type: AWS::SNS::Topic
    Properties:
      TopicName: !Sub "${AWS::StackName}-EncryptedSNSTopic"
      KmsMasterKeyId: !Ref SNSKMSKey


Outputs:
  KmsKeyId:
    Value: !Ref SNSKMSKey
  TopicArn:
    Value: !Ref EncryptedSNSTopic