// 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.

'use strict';
const common = require('../common');
if (!common.hasCrypto)
  common.skip('missing crypto');

if (!common.opensslCli)
  common.skip('node compiled without OpenSSL CLI.');

const assert = require('assert');
const tls = require('tls');
const https = require('https');
const fixtures = require('../common/fixtures');

// renegotiation limits to test
const LIMITS = [0, 1, 2, 3, 5, 10, 16];

{
  let n = 0;
  function next() {
    if (n >= LIMITS.length) return;
    tls.CLIENT_RENEG_LIMIT = LIMITS[n++];
    test(next);
  }
  next();
}

function test(next) {
  const options = {
    cert: fixtures.readSync('test_cert.pem'),
    key: fixtures.readSync('test_key.pem'),
  };

  const server = https.createServer(options, (req, res) => {
    const conn = req.connection;
    conn.on('error', (err) => {
      console.error(`Caught exception: ${err}`);
      assert(/TLS session renegotiation attack/.test(err));
      conn.destroy();
    });
    res.end('ok');
  });

  server.listen(0, () => {
    const agent = https.Agent({
      keepAlive: true,
    });

    let client;
    let renegs = 0;

    const options = {
      rejectUnauthorized: false,
      agent,
    };

    const { port } = server.address();

    https.get(`https://localhost:${port}/`, options, (res) => {
      client = res.socket;

      client.on('close', (hadErr) => {
        assert.strictEqual(hadErr, false);
        assert.strictEqual(renegs, tls.CLIENT_RENEG_LIMIT + 1);
        server.close();
        process.nextTick(next);
      });

      client.on('error', (err) => {
        console.log('CLIENT ERR', err);
        throw err;
      });

      spam();

      // simulate renegotiation attack
      function spam() {
        client.renegotiate({}, (err) => {
          assert.ifError(err);
          assert.ok(renegs <= tls.CLIENT_RENEG_LIMIT);
          setImmediate(spam);
        });
        renegs++;
      }
    });

  });
}