如何使用cloudformation加密Lambda变量

Question

AWS CloudFormation模板，包括一个带有敏感环境变量的Lambda函数。我想设置一个KMS密钥并用它加密它们

添加基本的cloudformation来加密密钥，即使使用AWS/Lambda默认加密也可以

  LambdaFunction:
            Type: AWS::Lambda::Function
            DependsOn: LambdaRole
            Properties:
              Environment:
               Variables:
                 key: AKIAJ6W7WERITYHYUHJGHN
                 secret: PGDzQ8277Fg6+SbuTyqxfrtbskjnaslkchkY1
                 dest: !Ref dstBucket
              Code:
                ZipFile:  |
                   from __future__ import print_function
                   import os
                   import json
                   import boto3
                   import time
                   import string
                   import urllib
                   print('Loading function')
                   ACCESS_KEY_ID = os.environ['key']
                   ACCESS_SECRET_KEY = os.environ['secret']
                   #s3_bucket = boto3.resource('s3',aws_access_key_id=ACCESS_KEY_ID,aws_secret_access_key=ACCESS_SECRET_KEY)
                   s3 = boto3.client('s3',aws_access_key_id=ACCESS_KEY_ID,aws_secret_access_key=ACCESS_SECRET_KEY)
                   #s3 = boto3.client('s3')
                   def handler(event, context):
                      source_bucket = event['Records'][0]['s3']['bucket']['name']
                      key = event['Records'][0]['s3']['object']['key']
                      #key = urllib.unquote_plus(event['Records'][0]['s3']['object']['key'])

                      #target_bucket     =  "${dstBucket}"
                      target_bucket = os.environ['dest']

                      copy_source = {'Bucket':source_bucket, 'Key':key}

                      try:
                        s3.copy_object(Bucket=target_bucket, Key=key, CopySource=copy_source)

                      except Exception as e:
                        print(e)
                        print('Error getting object {} from bucket {}. Make sure they exist '
                           'and your bucket is in the same region as this '
                           'function.'.format(key, source_bucket))
                        raise e

Answer 1

您可以通过使用KMS密钥加密访问密钥和秘密密钥，将其存储在AWS SSM参数存储库中。转到AWS系统管理器->参数存储->创建参数。您可以选择“安全字符串”选项并选择要加密的KMS密钥。您可以通过boto3函数调用访问该参数。例如，response=client.get_parameter(Name='AccessKey'，withDecryption=true)。您可以使用'response'变量来引用访问键。确保Lambda函数有足够的权限使用KMS密钥解密您存储的参数。将所有必要的解密权限附加到Lambda使用的IAM角色。这样，您就不需要将您的访问密钥和秘密密钥作为环境变量传递。希望这会有所帮助！