java - 禁用 Elasticsearch Restclient 的 SSL 验证在 Java 中不起作用

Question

我正在尝试连接到 gcp 框中托管的 Elasticsearch 。要连接到这个，有一个 SSL 检查，我需要一个证书。
但是，从这些讨论中，我们有可能关闭此验证。
How to disable SSL verification for Elasticsearch RestClient v6.7.0 in Java
https://discuss.elastic.co/t/host-name-does-not-match-the-certificate/186618
我曾试图删除验证。但它抛出以下错误

javax.net.ssl.SSLHandshakeException: General SSLEngine problem
    at org.elasticsearch.client.RestClient$SyncResponseListener.get(RestClient.java:947)
    at org.elasticsearch.client.RestClient.performRequest(RestClient.java:229)
    at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1762)
    at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1732)
    at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1694)
    at org.elasticsearch.client.RestHighLevelClient.search(RestHighLevelClient.java:1090)
    at org.dexter.lab.elasticUtils.ESUtils.getLastIndexedTimeStamp(ESUtils.java:44)
    at org.dexter.lab.druidUtils.DruidDelayChecker.main(DruidDelayChecker.java:357)
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
    at sun.security.ssl.Handshaker.checkThrown(Handshaker.java:1521)
    at sun.security.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:528)
    at sun.security.ssl.SSLEngineImpl.writeAppRecord(SSLEngineImpl.java:1197)
    at sun.security.ssl.SSLEngineImpl.wrap(SSLEngineImpl.java:1165)
    at javax.net.ssl.SSLEngine.wrap(SSLEngine.java:469)
    at org.apache.http.nio.reactor.ssl.SSLIOSession.doWrap(SSLIOSession.java:265)
    at org.apache.http.nio.reactor.ssl.SSLIOSession.doHandshake(SSLIOSession.java:305)
    at org.apache.http.nio.reactor.ssl.SSLIOSession.isAppInputReady(SSLIOSession.java:509)
    at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:120)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:588)
    at java.lang.Thread.run(Thread.java:748)
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
    at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
    at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1709)
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:318)
    at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:310)
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1639)
    at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223)
    at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037)
    at sun.security.ssl.Handshaker$1.run(Handshaker.java:970)
    at sun.security.ssl.Handshaker$1.run(Handshaker.java:967)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1459)
    at org.apache.http.nio.reactor.ssl.SSLIOSession.doRunTask(SSLIOSession.java:283)
    at org.apache.http.nio.reactor.ssl.SSLIOSession.doHandshake(SSLIOSession.java:353)
    ... 9 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:397)
    at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:302)
    at sun.security.validator.Validator.validate(Validator.java:262)
    at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
    at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:281)
    at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:136)
    at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1626)
    ... 17 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
    at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
    at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
    at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:392)
    ... 23 more

这就是我所做的:
我做了一个覆盖来验证函数并返回true。这样就不会查了。这是代码

restClientBuilder.setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
                @Override
                public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
                    return httpClientBuilder.setSSLHostnameVerifier(new HostnameVerifier() {
                        public boolean verify(String s, SSLSession sslSession) {
                            return true;
                        }
                    });
                }
            });

我尝试了另一种方法以及弹性线中提到的方法

restClientBuilder.setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
                @Override
                public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
                    return httpClientBuilder.setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE);
                }
            });

我已经生成了一个自签名证书并且它有效。我启用了调试日志以查看为什么需要证书。
这些是添加证书后的日志:

***
Found trusted certificate:
[
[
  Version: V3

接下来是有关证书的详细信息。
问题是我无法为生产环境生成自签名证书，并且即使在覆盖之后我也遇到了不使用证书的异常(exception)情况。
有什么可能的解决方法吗？任何帮助是极大的赞赏。
提前致谢

Answer 1

在您的示例中，您仅禁用了主机名验证。服务器(ElasticSearch 或 ElasticSearch 之上的东西)正在向您发送公钥/证书，并且您的 Restclient 尝试在 ssl 握手期间验证它。您需要做的是告诉您的 RestClient 它是 好的接收来自任何人的证书，但当它收到一个证书时，不应该真正验证它 .所以你需要一个自定义的信任管理器，它的任务是验证证书，但实际上它根本不验证。您需要的是 UnsafeX509ExtendedTrustManager ，请参阅下面的代码片段和 RestClient 的用法:
选项 1

public final class UnsafeX509ExtendedTrustManager extends X509ExtendedTrustManager {

    private static final X509ExtendedTrustManager INSTANCE = new UnsafeX509ExtendedTrustManager();
    private static final X509Certificate[] EMPTY_CERTIFICATES = new X509Certificate[0];

    private UnsafeX509ExtendedTrustManager() {}

    public static X509ExtendedTrustManager getInstance() {
        return INSTANCE;
    }

    @Override
    public void checkClientTrusted(X509Certificate[] certificates, String authType) { 

    }

    @Override
    public void checkClientTrusted(X509Certificate[] certificates, String authType, Socket socket) {
    
    }

    @Override
    public void checkClientTrusted(X509Certificate[] certificates, String authType, SSLEngine sslEngine) {

    }

    @Override
    public void checkServerTrusted(X509Certificate[] certificates, String authType) {

    }

    @Override
    public void checkServerTrusted(X509Certificate[] certificates, String authType, Socket socket) {

    }

    @Override
    public void checkServerTrusted(X509Certificate[] certificates, String authType, SSLEngine sslEngine) {

    }

    @Override
    public X509Certificate[] getAcceptedIssuers() {
        return EMPTY_CERTIFICATES;
    }

}

可以使用以下代码段将上述信任管理器提供给 RestHighLevelClient:

SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, new TrustManager[]{ UnsafeX509ExtendedTrustManager.INSTANCE }, null);

RestClient restClient = RestClient
        .builder(new HttpHost("localhost", 9200, "https"))
        .setHttpClientConfigCallback(httpClientBuilder -> 
                httpClientBuilder.setSSLContext(sslContext)
                                 .setSSLHostnameVerifier((host, session) -> true))
        .build();

顺便说一句，我不建议您或其他任何人使用 UnsafeX509ExtendedTrustManager。它是不安全的，根本不应该在生产中使用。
选项 2
如果您不想将自定义代码添加到代码库中，而只想轻松禁用 ssl 验证，您可能需要尝试以下代码段。它是一个可以轻松生成 SSLContext 或其他 ssl Material 的库，并且可以选择禁用 ssl 验证。

<dependency>
    <groupId>io.github.hakky54</groupId>
    <artifactId>sslcontext-kickstart</artifactId>
    <version>7.1.0</version>
</dependency>

用法

SSLFactory sslFactory = SSLFactory.builder()
          .withUnsafeTrustMaterial()
          .withUnsafeHostnameVerifier()
          .build();

RestClient restClient = RestClient
        .builder(new HttpHost("localhost", 9200, "https"))
        .setHttpClientConfigCallback(httpClientBuilder -> 
                httpClientBuilder.setSSLContext(sslFactory.getSslContext())
                                 .setSSLHostnameVerifier(sslFactory.getHostnameVerifier())
        .build();