Lambda authorizer examples for AWS SAM

The AWS::Serverless::Api resource type supports two types of Lambda authorizers: TOKEN authorizers and REQUEST authorizers. The AWS::Serverless::HttpApi resource type supports only REQUEST authorizers. The following are examples of each type.

Lambda TOKEN authorizer example (AWS::Serverless::Api)

You can control access to your APIs by defining a Lambda TOKEN authorizer within your AWS SAM template. To do this, you use the ApiAuth data type.

The following is an example AWS SAM template section for a Lambda TOKEN authorizer:

Note

In the following example, the SAM FunctionRole is implicitly generated.

Resources:
  MyApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: Prod
      Auth:
        DefaultAuthorizer: MyLambdaTokenAuthorizer
        Authorizers:
          MyLambdaTokenAuthorizer:
            FunctionArn: !GetAtt MyAuthFunction.Arn

  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./src
      Handler: index.handler
      Runtime: nodejs12.x
      Events:
        GetRoot:
          Type: Api
          Properties:
            RestApiId: !Ref MyApi
            Path: /
            Method: get

  MyAuthFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./src
      Handler: authorizer.handler
      Runtime: nodejs12.x

For more information about Lambda authorizers, see Use API Gateway Lambda authorizers in the API Gateway Developer Guide.

Lambda REQUEST authorizer example (AWS::Serverless::Api)

You can control access to your APIs by defining a Lambda REQUEST authorizer within your AWS SAM template. To do this, you use the ApiAuth data type.

The following is an example AWS SAM template section for a Lambda REQUEST authorizer:

Resources:
  MyApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: Prod
      Auth:
        DefaultAuthorizer: MyLambdaRequestAuthorizer
        Authorizers:
          MyLambdaRequestAuthorizer:
            FunctionPayloadType: REQUEST
            FunctionArn: !GetAtt MyAuthFunction.Arn
            Identity:
              QueryStrings:
                - auth

  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./src
      Handler: index.handler
      Runtime: nodejs12.x
      Events:
        GetRoot:
          Type: Api
          Properties:
            RestApiId: !Ref MyApi
            Path: /
            Method: get

  MyAuthFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./src
      Handler: authorizer.handler
      Runtime: nodejs12.x

For more information about Lambda authorizers, see Use API Gateway Lambda authorizers in the API Gateway Developer Guide.

Lambda authorizer example (AWS::Serverless::HttpApi)

You can control access to your HTTP APIs by defining a Lambda authorizer within your AWS SAM template. To do this, you use the HttpApiAuth data type.

The following is an example AWS SAM template section for a Lambda authorizer:

Resources:
  MyApi:
    Type: AWS::Serverless::HttpApi
    Properties:
      StageName: Prod
      Auth:
        DefaultAuthorizer: MyLambdaRequestAuthorizer
        Authorizers:
          MyLambdaRequestAuthorizer:
            FunctionArn: !GetAtt MyAuthFunction.Arn
            FunctionInvokeRole: !GetAtt MyAuthFunctionRole.Arn
            Identity:
              Headers:
                - Authorization
            AuthorizerPayloadFormatVersion: 2.0
            EnableSimpleResponses: true

  MyFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./src
      Handler: index.handler
      Runtime: nodejs12.x
      Events:
        GetRoot:
          Type: HttpApi
          Properties:
            ApiId: !Ref MyApi
            Path: /
            Method: get
            PayloadFormatVersion: "2.0"

  MyAuthFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./src
      Handler: authorizer.handler
      Runtime: nodejs12.x