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serverless-custom-auth-plugin

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Readme

Serverless AWS Custom Auth Plugin

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A serverless plugin that adds the possibility to configure AWS_IAM or Cognito Auth for your API Gateway endpoints and 'Invoke with caller credentials'. The reason why we made this plugin is because by the default serverless will generate a random authorizer name from the Cognito User Pool, there is no way to configure Authorizer ID or specify a name of new authorizer to be created if not exist.

Note: Serverless v1.0.0 or higher is required.

Installation

Add the plugin to your package.json's devDependencies and to the plugins array in your serverless.yml file. After installation the plugin will automatically hook into the deployment process.

npm install serverless-custom-auth-plugin --save-dev

plugins:
  - other plugins
  - serverless-custom-auth-plugin

Usage

First, you will need to add your custom Authorizer with a friendly name

XXXAuthorizerAuthorizer:
  Type: AWS::ApiGateway::Authorizer
  Properties:
    AuthorizerUri: 
      Ref: CognitoUserPoolXXX
    IdentitySource: method.request.header.Authorization
    Name: Friendly Name of this authorizer
    ProviderARNs:
      - Ref: CognitoUserPoolXXX
    RestApiId:
      Ref: ApiGatewayRestApi
    Type: COGNITO_USER_POOLS

and configure your event

myFunc:
  handler: myFunc.get
  name: ${self:provider.stage}-myFunc-get-item
  memorySize: 128
  events:
    - http:
      method: GET
      path: api-path
      cors: true 
      invokeWithCallerCredentials: true
      useIAMAuth: true // Use IAM auth
      useCognitoAuth: true // Or, we can use Cognito Auth
      authorizerId:
        Ref: XXXAuthorizer // Your authorizer resource in serverless.yml

License

MIT