node/test/parallel/test-tls-getcipher.js

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';
const common = require('../common');

if (!common.hasCrypto) {
  common.skip('missing crypto');
  return;
}
const assert = require('assert');
const tls = require('tls');

const fs = require('fs');
const cipher_list = ['AES128-SHA256', 'AES256-SHA256'];
const cipher_version_pattern = /TLS|SSL/;
const options = {
  key: fs.readFileSync(common.fixturesDir + '/keys/agent2-key.pem'),
  cert: fs.readFileSync(common.fixturesDir + '/keys/agent2-cert.pem'),
  ciphers: cipher_list.join(':'),
  honorCipherOrder: true
};

const server = tls.createServer(options, common.mustCall());

server.listen(0, '127.0.0.1', common.mustCall(function() {
  const client = tls.connect({
    host: '127.0.0.1',
    port: this.address().port,
    ciphers: cipher_list.join(':'),
    rejectUnauthorized: false
  }, common.mustCall(function() {
    const cipher = client.getCipher();
    assert.strictEqual(cipher.name, cipher_list[0]);
    assert(cipher_version_pattern.test(cipher.version));
    client.end();
    server.close();
  }));
}));