Java 类io.netty.handler.ssl.OpenSslEngine 实例源码

@VisibleForTesting
static void logSslEngineDetails(Level level, ChannelHandlerContext ctx, String msg,
                                              @Nullable Throwable t) {
  if (!log.isLoggable(level)) {
    return;
  }

  SslHandler sslHandler = ctx.pipeline().get(SslHandler.class);
  SSLEngine engine = sslHandler.engine();

  StringBuilder builder = new StringBuilder(msg);
  builder.append("\nSSLEngine Details: [\n");
  if (engine instanceof OpenSslEngine) {
    builder.append("    OpenSSL, ");
    builder.append("Version: 0x").append(Integer.toHexString(OpenSsl.version()));
    builder.append(" (").append(OpenSsl.versionString()).append("), ");
    builder.append("ALPN supported: ").append(OpenSsl.isAlpnSupported());
  } else if (JettyTlsUtil.isJettyAlpnConfigured()) {
    builder.append("    Jetty ALPN");
  } else if (JettyTlsUtil.isJettyNpnConfigured()) {
    builder.append("    Jetty NPN");
  } else if (JettyTlsUtil.isJava9AlpnAvailable()) {
    builder.append("    JDK9 ALPN");
  }
  builder.append("\n    TLS Protocol: ");
  builder.append(engine.getSession().getProtocol());
  builder.append("\n    Application Protocol: ");
  builder.append(sslHandler.applicationProtocol());
  builder.append("\n    Need Client Auth: " );
  builder.append(engine.getNeedClientAuth());
  builder.append("\n    Want Client Auth: ");
  builder.append(engine.getWantClientAuth());
  builder.append("\n    Supported protocols=");
  builder.append(Arrays.toString(engine.getSupportedProtocols()));
  builder.append("\n    Enabled protocols=");
  builder.append(Arrays.toString(engine.getEnabledProtocols()));
  builder.append("\n    Supported ciphers=");
  builder.append(Arrays.toString(engine.getSupportedCipherSuites()));
  builder.append("\n    Enabled ciphers=");
  builder.append(Arrays.toString(engine.getEnabledCipherSuites()));
  builder.append("\n]");

  log.log(level, builder.toString(), t);
}