https: throw Error if required params missing

Throw an error when required parameters are missing. Handles ciphers that requires no auth.
Does not throw error If pfx option is provided.
Additional tests added for the same.

Fixes: #3024
PR-URL: #3064

lib/_tls_wrap.js

@@ -869,9 +869,25 @@ Server.prototype.setOptions = function(options) {
   }
 
   if (options.pfx) this.pfx = options.pfx;
-  if (options.key) this.key = options.key;
+  var defaultCiphers = options.ciphers === tls.DEFAULT_CIPHERS;
+  if (!options.key) {
+    if ((options.ciphers === undefined || defaultCiphers) && !options.pfx) {
+      throw new Error('key is a required parameter for Server.createServer');
+    }
+  } else {
+    this.key = options.key;
+  }
+
   if (options.passphrase) this.passphrase = options.passphrase;
-  if (options.cert) this.cert = options.cert;
+
+  if (!options.cert) {
+    if ((options.ciphers === undefined || defaultCiphers) && !options.pfx) {
+      throw new Error('cert is a required parameter for Server.createServer');
+    }
+  } else {
+    this.cert = options.cert;
+  }
+
   if (options.ca) this.ca = options.ca;
   if (options.secureProtocol) this.secureProtocol = options.secureProtocol;
   if (options.crl) this.crl = options.crl;

test/parallel/test-https-pfx.js

@@ -21,13 +21,28 @@ var options = {
   rejectUnauthorized: false
 };
 
+var options1 = {
+  host: '127.0.0.1',
+  port: common.PORT,
+  path: '/',
+  pfx: pfx,
+  passphrase: 'sample',
+  requestCert: true
+};
+
 var server = https.createServer(options, function(req, res) {
   assert.equal(req.socket.authorized, false); // not a client cert
   assert.equal(req.socket.authorizationError, 'DEPTH_ZERO_SELF_SIGNED_CERT');
   res.writeHead(200);
   res.end('OK');
 });
 
+assert.doesNotThrow(() => https.createServer(options1, assert.fail),
+ 'cert is a required parameter for Server.createServer');
+
+assert.doesNotThrow(() => https.createServer(options1, assert.fail),
+  'key is a required parameter for Server.createServer');
+
 server.listen(options.port, options.host, function() {
   var data = '';
 

test/parallel/test-https-server-options.js

@@ -0,0 +1,21 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const https = require('https');
+const fs = require('fs');
+
+const options1 = {
+  key: fs.readFileSync(common.fixturesDir + '/keys/agent1-key.pem', 'ascii'),
+  crt: fs.readFileSync(common.fixturesDir + '/keys/agent1-cert.pem', 'ascii')
+};
+
+const options2 = {
+  ky: fs.readFileSync(common.fixturesDir + '/keys/agent1-key.pem', 'ascii'),
+  cert: fs.readFileSync(common.fixturesDir + '/keys/agent1-cert.pem', 'ascii')
+};
+
+assert.throws(() => https.createServer(options1, assert.fail),
+'cert is a required parameter for Server.createServer');
+
+assert.throws(() => https.createServer(options2, assert.fail),
+'key is a required parameter for Server.createServer');