如何使用启用SSLv3？

Question

SSLv3在Apache4.3.6版本之后就被禁用了，但是我使用的是4.5版本。The 开发人员写

那些希望继续使用SSLv3的用户需要显式地启用对它的支持。

我试图在JVM级别上设置支持的协议，但是它没有工作。这个例子在Scala中，但这与问题无关：

System.setProperty("https.protocols", "SSLv2Hello,SSLv3,TLSv1,TLSv1.1,TLSv1.2")

我的第二次尝试是：

val instance: CloseableHttpClient = {
  val trustStrategy = new TrustStrategy {
    override def isTrusted(x509Certificates: Array[X509Certificate], s: String) = true
  }
  val sslContext = new SSLContextBuilder().loadTrustMaterial(null, trustStrategy).build()
  val sslSocketFactory = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE)
  val socketFactoryRegistry =
    RegistryBuilder.create[ConnectionSocketFactory]()
        .register("http", PlainConnectionSocketFactory.getSocketFactory)
        .register("https", sslSocketFactory)
        .build()
  val connectionManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry)
  HttpClients.custom()
      .disableRedirectHandling()
      .setSSLContext(sslContext)
      .setConnectionManager(connectionManager)
      .build()
}

但也没用。

如何连接到支持SSLv2Hello、SSLv3、TLSv1、TLSv1.1、TLSv1.2和ApacheApache4.5的主机？

Answer 1

默认情况下，HttpClient不考虑系统属性。或者需要指示HttpClient构建器这样做。

CloseableHttpClient client = HttpClients.createSystem();

或者用自定义协议设置手动配置连接套接字工厂。

SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(
        SSLContext.getDefault(),
        new String[] { "SSLv2Hello","SSLv3","TLSv1","TLSv1.1","TLSv1.2"},
        null,
        SSLConnectionSocketFactory.getDefaultHostnameVerifier());
Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
        .register("http", PlainConnectionSocketFactory.getSocketFactory())
        .register("https", socketFactory)
        .build();

PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
CloseableHttpClient client = HttpClients.custom().setConnectionManager(cm).build();

编辑

此代码段与注释中提到的站点运行良好。

SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(
        SSLContext.getDefault(),
        new String[] {"TLSv1"},
        null,
        SSLConnectionSocketFactory.getDefaultHostnameVerifier());
Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
        .register("http", PlainConnectionSocketFactory.getSocketFactory())
        .register("https", socketFactory)
        .build();

PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(socketFactoryRegistry);
CloseableHttpClient client = HttpClients.custom().setConnectionManager(cm).build();
try (CloseableHttpResponse response = client.execute(new HttpGet("https://www.ethz.ch/de.html"))) {
    System.out.println(response.getStatusLine());
    System.out.println(EntityUtils.toString(response.getEntity()));
}