无法找到请求目标的有效证书路径 - java

Question

我正在尝试使用 HttpClient 对象连接到网站。它适用于我们通常使用的网站（如谷歌）。但是有一个网站，当我尝试连接时，我的程序给出了这个错误..

javax.net.ssl.SSLHandshakeException: 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.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1917)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:301)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:295)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1369)
....................
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:387)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
at sun.security.validator.Validator.validate(Validator.java:260)
...............

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:145)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:131)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
... 27 more

当我尝试从浏览器访问此网址时，我必须单击仍然继续。否则浏览器将无法加载该页面。它会给出一个隐私错误，提示您的连接不是私有的。

我怎样才能在我的java应用程序中克服这个问题..？我希望我的软件能够连接该网址，没有任何错误或不要求任何确认。

Answer 1

TrustSelfSignedStrategy

方法

当我使用 TrustSelfSignedStrategy 对象作为 HttpClient 的信任材料时，问题得到了解决。

        httpClient = HttpClients.custom()
            .setSSLSocketFactory(new SSLConnectionSocketFactory(SSLContexts.custom()
                    .loadTrustMaterial(null, new TrustSelfSignedStrategy())
                    .build()
                )
            ).build();

TrustAllStrategy

方法

如果上述方法不起作用，例如因为服务器提供的证书不是自签名证书，而是由于其他原因（例如主机名不匹配）而不受信任，那么这是一种更残酷的方法。 不要在生产中使用它，因为它会盲目信任所有证书。这通常仅对单元/集成测试和其他类似场景有用。

        httpClient = HttpClients.custom()
            .setSSLSocketFactory(new SSLConnectionSocketFactory(SSLContexts.custom()
                    .loadTrustMaterial(null, new TrustAllStrategy())
                    .build()
                )
            ).build();

Answer 2

对于 HttpClient4.x，以下将信任所有

public static HttpClientBuilder createTrustAllHttpClientBuilder() {
  SSLContextBuilder builder = new SSLContextBuilder();
  builder.loadTrustMaterial(null, (chain, authType) -> true);           
  SSLConnectionSocketFactory sslsf = new 
  SSLConnectionSocketFactory(builder.build(), NoopHostnameVerifier.INSTANCE);
  return HttpClients.custom().setSSLSocketFactory(sslsf);
}