使用okHttp信任所有证书

出于测试目的，我正在尝试向我的okHttp客户端添加一个套接字工厂，该工厂在设置代理时信任所有内容。这已经做了很多次了，但我对信任套接字工厂的实现似乎缺少了一些东西：

class TrustEveryoneManager implements X509TrustManager {
    @Override
    public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException { }
    @Override
    public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException { }
    @Override
    public java.security.cert.X509Certificate[] getAcceptedIssuers() {
        return null;
    }
}
OkHttpClient client = new OkHttpClient();
final InetAddress ipAddress = InetAddress.getByName("XX.XXX.XXX.XXX"); // some IP
client.setProxy(new Proxy(Proxy.Type.HTTP, new InetSocketAddress(ipAddress, 8888)));
SSLContext sslContext = SSLContext.getInstance("TLS");
TrustManager[] trustManagers = new TrustManager[]{new TrustEveryoneManager()};
sslContext.init(null, trustManagers, null);
client.setSslSocketFactory(sslContext.getSocketFactory);

我的应用程序没有发出任何请求，也没有记录任何异常，所以它似乎在okHttp中无声地失败了。经过进一步调查，当强制握手时，okHttp的Connection.upgradeToTls()中似乎有一个Exception被吞噬。我得到的例外是：javax.net.ssl.SSLException: SSL handshake terminated: ssl=0x74b522b0: SSL_ERROR_ZERO_RETURN occurred. You should never see this.

下面的代码生成一个SSLContext，它在创建一个不抛出任何异常的SSLSocketFactory时就像一个魅力：

protected SSLContext getTrustingSslContext() throws NoSuchAlgorithmException, KeyStoreException, KeyManagementException {
    final SSLContextBuilder trustingSSLContextBuilder = SSLContexts.custom()
            .loadTrustMaterial(null, new TrustStrategy() {
                @Override
                public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                    return true; // Accepts any ssl cert whether valid or not.
                }
            });
    return trustingSSLContextBuilder.build();
}

问题是，我正试图从我的应用程序中完全删除所有Apache HttpClient依赖项。使用ApacheHttpClient生成SSLContext的底层代码似乎很简单，但我显然缺少一些东西，因为我无法将SSLContext配置为与之匹配。

有人能够在不使用ApacheHttpClient的情况下生成SSLContext实现吗？

为了防止有人落在这里，（唯一）对我有效的解决方案是创建OkHttpClient，就像这里解释的那样。

这是代码：

private static OkHttpClient getUnsafeOkHttpClient() {
  try {
    // Create a trust manager that does not validate certificate chains
    final TrustManager[] trustAllCerts = new TrustManager[] {
        new X509TrustManager() {
          @Override
          public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
          }
          @Override
          public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
          }
          @Override
          public java.security.cert.X509Certificate[] getAcceptedIssuers() {
            return new java.security.cert.X509Certificate[]{};
          }
        }
    };
    // Install the all-trusting trust manager
    final SSLContext sslContext = SSLContext.getInstance("SSL");
    sslContext.init(null, trustAllCerts, new java.security.SecureRandom());
    // Create an ssl socket factory with our all-trusting manager
    final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
    OkHttpClient.Builder builder = new OkHttpClient.Builder();
    builder.sslSocketFactory(sslSocketFactory, (X509TrustManager)trustAllCerts[0]);
    builder.hostnameVerifier(new HostnameVerifier() {
      @Override
      public boolean verify(String hostname, SSLSession session) {
        return true;
      }
    });
    OkHttpClient okHttpClient = builder.build();
    return okHttpClient;
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

我为Kotlin做了一个扩展函数。将其粘贴到您喜欢的位置，并在创建OkHttpClient时导入。

fun OkHttpClient.Builder.ignoreAllSSLErrors(): OkHttpClient.Builder {
    val naiveTrustManager = object : X509TrustManager {
        override fun getAcceptedIssuers(): Array<X509Certificate> = arrayOf()
        override fun checkClientTrusted(certs: Array<X509Certificate>, authType: String) = Unit
        override fun checkServerTrusted(certs: Array<X509Certificate>, authType: String) = Unit
    }
    val insecureSocketFactory = SSLContext.getInstance("TLSv1.2").apply {
        val trustAllCerts = arrayOf<TrustManager>(naiveTrustManager)
        init(null, trustAllCerts, SecureRandom())
    }.socketFactory
    sslSocketFactory(insecureSocketFactory, naiveTrustManager)
    hostnameVerifier(HostnameVerifier { _, _ -> true })
    return this
}

这样使用：

val okHttpClient = OkHttpClient.Builder().apply {
    // ...
    if (BuildConfig.DEBUG) //if it is a debug build ignore ssl errors
        ignoreAllSSLErrors()
    //...
}.build()

如果有人需要，这是sonxurxo在Kotlin的解决方案。

private fun getUnsafeOkHttpClient(): OkHttpClient {
    // Create a trust manager that does not validate certificate chains
    val trustAllCerts = arrayOf<TrustManager>(object : X509TrustManager {
        override fun checkClientTrusted(chain: Array<out X509Certificate>?, authType: String?) {
        }
        override fun checkServerTrusted(chain: Array<out X509Certificate>?, authType: String?) {
        }
        override fun getAcceptedIssuers() = arrayOf<X509Certificate>()
    })
    // Install the all-trusting trust manager
    val sslContext = SSLContext.getInstance("SSL")
    sslContext.init(null, trustAllCerts, java.security.SecureRandom())
    // Create an ssl socket factory with our all-trusting manager
    val sslSocketFactory = sslContext.socketFactory
    return OkHttpClient.Builder()
        .sslSocketFactory(sslSocketFactory, trustAllCerts[0] as X509TrustManager)
        .hostnameVerifier { _, _ -> true }.build()
}

更新OkHttp 3.0时，getAcceptedIssuers()函数必须返回空数组而不是null。

以下方法已弃用

sslSocketFactory(SSLSocketFactory sslSocketFactory)

考虑将其更新为

sslSocketFactory(SSLSocketFactory sslSocketFactory, X509TrustManager trustManager)

SSLSocketFactory不公开其X509TrustManager，这是OkHttp构建干净证书链所需的字段。相反，此方法必须使用反射来提取信任管理器。应用程序应该更喜欢调用sslSocketFactory（sslSocketFactory，X509TrustManager），这样可以避免这种反射。

来源：OkHttp文档

OkHttpClient.Builder builder = new OkHttpClient.Builder();
builder.sslSocketFactory(sslContext.getSocketFactory(),
    new X509TrustManager() {
        @Override
        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
        }
        @Override
        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
        }
        @Override
        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
            return new java.security.cert.X509Certificate[]{};
        }
    });

如果有人需要，这就是Scala解决方案

def anUnsafeOkHttpClient(): OkHttpClient = {
val manager: TrustManager =
  new X509TrustManager() {
    override def checkClientTrusted(x509Certificates: Array[X509Certificate], s: String) = {}
    override def checkServerTrusted(x509Certificates: Array[X509Certificate], s: String) = {}
    override def getAcceptedIssuers = Seq.empty[X509Certificate].toArray
  }
val trustAllCertificates =  Seq(manager).toArray
val sslContext = SSLContext.getInstance("SSL")
sslContext.init(null, trustAllCertificates, new java.security.SecureRandom())
val sslSocketFactory = sslContext.getSocketFactory()
val okBuilder = new OkHttpClient.Builder()
okBuilder.sslSocketFactory(sslSocketFactory, trustAllCertificates(0).asInstanceOf[X509TrustManager])
okBuilder.hostnameVerifier(new NoopHostnameVerifier)
okBuilder.build()

}

您永远不应该在代码中覆盖证书验证！如果需要进行测试，请使用内部/测试CA，并在设备或模拟器上安装CA根证书。如果您不知道如何设置CA，则可以使用BurpSuite或Charles Proxy。

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