generate a self signed certificate with AWS Lambda

createSelfSignedCert.js

const exec = require('child_process').exec;
const fs = require("fs");

exports.handler = function(event, context) {
  console.log("creating certificate");
  exec('openssl req -x509 -newkey rsa:4096 -keyout /tmp/key.pem -out /tmp/cert.pem -subj "/C=DE/ST=Bavaria/L=Munich/O=apimeister org/OU=org unit/CN=apimeister.com" -days 45 -nodes', (error, stdout, stderr) => {
    if (error) {
      throw error;
    }
    console.log("reading certificate");
    
    var output = {};

    //read cert file
    var cbytes = fs.readFileSync("/tmp/cert.pem");
    var cb64 = new Buffer(cbytes).toString('base64');
    output.cert={filename:"cert.pem",fileContent:cb64};

    //read key file
    var kbytes = fs.readFileSync("/tmp/key.pem");
    var kb64 = new Buffer(kbytes).toString('base64');
    output.key={filename:"key.pem",fileContent:kb64};

    context.succeed(output);
  });
}