tls: do not wrap net.Socket with StreamWrap

Fixes: nodejs#3655
PR-URL: nodejs#12799
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Fedor Indutny <fedor@indutny.com>

lib/_tls_wrap.js

@@ -31,7 +31,6 @@ const util = require('util');
 const common = require('_tls_common');
 const StreamWrap = require('_stream_wrap').StreamWrap;
 const Buffer = require('buffer').Buffer;
-const Duplex = require('stream').Duplex;
 const debug = util.debuglog('tls');
 const Timer = process.binding('timer_wrap').Timer;
 const tls_wrap = process.binding('tls_wrap');
@@ -275,12 +274,10 @@ function TLSSocket(socket, options) {
 
   // Wrap plain JS Stream into StreamWrap
   var wrap;
-  if (!(socket instanceof net.Socket) && socket instanceof Duplex)
-    wrap = new StreamWrap(socket);
-  else if ((socket instanceof net.Socket) && !socket._handle)
-    wrap = new StreamWrap(socket);
-  else
+  if ((socket instanceof net.Socket && socket._handle) || !socket)
     wrap = socket;
+  else
+    wrap = new StreamWrap(socket);
 
   // Just a documented property to make secure sockets
   // distinguishable from regular ones.

test/parallel/test-tls-wrap-event-emmiter.js

@@ -0,0 +1,16 @@
+'use strict';
+
+/*
+ * Issue: https://github.com/nodejs/node/issues/3655
+ * Test checks if we get exception instead of runtime error
+ */
+
+require('../common');
+const assert = require('assert');
+
+const TlsSocket = require('tls').TLSSocket;
+const EventEmitter = require('events').EventEmitter;
+assert.throws(
+  () => { new TlsSocket(new EventEmitter()); },
+  /^TypeError: this\.stream\.pause is not a function/
+);