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// 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 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 server = tls.createServer(options, function(conn) {
conn.on('error', function(err) {
console.error('Caught exception: ' + err);
assert(/TLS session renegotiation attack/.test(err));
conn.destroy();
});
conn.pipe(conn);
});
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;
child.stderr.on('data', function(data) {
handshakes += (('' + data).match(/verify return:1/g) || []).length;
if (handshakes === 2) spam();
});
child.on('exit', function() {
// with a renegotiation limit <= 1, we always see 4 handshake markers:
// two for the initial handshake and another two for the attempted
// renegotiation
assert.equal(handshakes, 2 * Math.max(2, tls.CLIENT_RENEG_LIMIT));
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, 250);
}
});
}