Random RSA generation

express.d.ts

declare global {
  namespace Express{
    interface Application {
      rsa: {
        passphrase: string;
        privateKey?: string;
        publicKey?: string;
      }
    }
  }
}

express_plus_rsa_generation.js

app.rsa = {
  passphrase: utils.randomString(32),
};
console.log("RSA Passphrase is " + app.rsa.passphrase);
if (fs.existsSync("./keys") === false) {
  fs.mkdirSync("keys");
}
try { fs.rmSync("./keys/private.pem"); } catch (error) {}
try { fs.rmSync("./keys/public.pem"); } catch (error) {}
console.log("Generating key chain");
const privategen = childprocess.exec(`openssl genrsa -des3 -passout pass:${app.rsa.passphrase} -out keys/private.pem 2048`);
privategen.once("close", (error) => {
  if (error) {
    return reject("OpenSSL private generate command exited with error " + error);
  }

  const publicgen = childprocess.exec(`openssl rsa -in keys/private.pem -passin pass:${app.rsa.passphrase} -outform PEM -pubout -out keys/public.pem`);
  publicgen.once("close", (error) => {
    if (error) {
      return reject("OpenSSL public generate command exited with error");
    }

    app.rsa.privateKey = fs.readFileSync("./keys/private.pem").toString();
    app.rsa.publicKey = fs.readFileSync("./keys/public.pem").toString();
    console.log("Done generating key chain");
    resolve();
  });
});