title: How to verify client-certificate in AWS Lambda
body: <p>I'm new to Lambda... Assuming I have an API Gateway that invokes my Lambda function (node.js) upon some HTTPS POST request from the web, how do I perform SSL peer authentication of the original HTTP client?</p>
  
  <p>For example, let's say some server on the internet performs an HTTP POST to my API Gateway, which in turn invokes my Lambda. I want my Lambda to allow requests only from a client whose SSL certificate is associated to a specific domain..</p>
  
  <p>thanks!</p>