Test client renegotiation attacks on HTTPS

This test should output roughly the same results as the tls ci-reneg attack
pummel test.  However, it does not.

test/pummel/test-https-ci-reneg-attack.js

@@ -0,0 +1,106 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('../common');
+var assert = require('assert');
+var spawn = require('child_process').spawn;
+var tls = require('tls');
+var https = require('https');
+var fs = require('fs');
+
+// renegotiation limits to test
+var LIMITS = [0, 1, 2, 3, 5, 10, 16];
+
+if (process.platform === 'win32') {
+  console.log('Skipping test, you probably don\'t have openssl installed.');
+  process.exit();
+}
+
+(function() {
+  var n = 0;
+  function next() {
+    if (n >= LIMITS.length) return;
+    tls.CLIENT_RENEG_LIMIT = LIMITS[n++];
+    test(next);
+  }
+  next();
+})();
+
+function test(next) {
+  var options = {
+    cert: fs.readFileSync(common.fixturesDir + '/test_cert.pem'),
+    key: fs.readFileSync(common.fixturesDir + '/test_key.pem')
+  };
+
+  var seenError = false;
+
+  var server = https.createServer(options, function(req, res) {
+    var conn = req.connection;
+    conn.on('error', function(err) {
+      console.error('Caught exception: ' + err);
+      assert(/TLS session renegotiation attack/.test(err));
+      conn.destroy();
+      seenError = true;
+    });
+    res.end('ok');
+  });
+
+  server.listen(common.PORT, function() {
+    var args = ('s_client -connect 127.0.0.1:' + common.PORT).split(' ');
+    var child = spawn('openssl', args);
+
+    child.stdout.pipe(process.stdout);
+    child.stderr.pipe(process.stderr);
+
+    // count handshakes, start the attack after the initial handshake is done
+    var handshakes = 0;
+    var renegs = 0;
+
+    child.stderr.on('data', function(data) {
+      if (seenError) return;
+      handshakes += (('' + data).match(/verify return:1/g) || []).length;
+      if (handshakes === 2) spam();
+      renegs += (('' + data).match(/RENEGOTIATING/g) || []).length;
+    });
+
+    child.on('exit', function() {
+      assert.equal(renegs, tls.CLIENT_RENEG_LIMIT + 1);
+      server.close();
+      process.nextTick(next);
+    });
+
+    var closed = false;
+    child.stdin.on('error', function(err) {
+      assert.equal(err.code, 'EPIPE');
+      closed = true;
+    });
+    child.stdin.on('close', function() {
+      closed = true;
+    });
+
+    // simulate renegotiation attack
+    function spam() {
+      if (closed) return;
+      child.stdin.write('R\n');
+      setTimeout(spam, 50);
+    }
+  });
+}