Function test

test/parallel/test-tls-dhe.js:77–104

(dhparam, keylen, expectedCipher)

}

function test(dhparam, keylen, expectedCipher) {
  const options = {
    key,
    cert,
    ciphers,
    dhparam,
    maxVersion: 'TLSv1.2',
  };

  const server = tls.createServer(options, (conn) => conn.end());

  server.listen(0, '127.0.0.1', common.mustCall(() => {
    const args = ['s_client', '-connect', `127.0.0.1:${server.address().port}`,
                  '-cipher', `${ciphers}:@SECLEVEL=1`];

    execFile(opensslCli, args, common.mustSucceed((stdout) => {
      assert(keylen === null ||
             // s_client < OpenSSL 3.5
             stdout.includes(`Server Temp Key: DH, ${keylen} bits`) ||
             // s_client >= OpenSSL 3.5
             stdout.includes(`Peer Temp Key: DH, ${keylen} bits`));
      assert(stdout.includes(`Cipher    : ${expectedCipher}`));
      server.close();
    }));
  }));

  return once(server, 'close');
}

function testCustomParam(keylen, expectedCipher) {
  const dhparam = loadDHParam(keylen);