android - 设置 AsyncHttpClient 以使用 HTTPS

Question

我正在使用 com.loopj.android:android-async-http:1.4.9 来处理我对服务器的请求。在我的服务器需要 SSL/TLS 之前，它工作正常。所以我需要修改我的 AsyncHTTPClient 以在所有 URL 中使用 HTTPS。

我检查了这个类似的how to make HTTPS calls using AsyncHttpClient?但没有提供明确的问题解决方案。由于图书馆本身的警告，接受的解决方案也不安全:

Warning! This omits SSL certificate validation on every device, use with caution.

所以我继续检查其他解决方案。我最终遵循了以下建议:https://developer.android.com/training/articles/security-ssl.html .因此，我有类似的东西:

// Load CAs from an InputStream
// (could be from a resource or ByteArrayInputStream or ...)
CertificateFactory cf = CertificateFactory.getInstance("X.509");
// From https://www.washington.edu/itconnect/security/ca/load-der.crt
InputStream caInput = new BufferedInputStream(new FileInputStream("load-der.crt"));
Certificate ca;
try {
    ca = cf.generateCertificate(caInput);
    System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());
} finally {
    caInput.close();
}

// Create a KeyStore containing our trusted CAs
String keyStoreType = KeyStore.getDefaultType();
KeyStore keyStore = KeyStore.getInstance(keyStoreType);
keyStore.load(null, null);
keyStore.setCertificateEntry("ca", ca);

// Create a TrustManager that trusts the CAs in our KeyStore
String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
tmf.init(keyStore);

// Create an SSLContext that uses our TrustManager
SSLContext context = SSLContext.getInstance("TLS");
context.init(null, tmf.getTrustManagers(), null);

// Get SocketFactory from our SSLContext
//
//      !!!PROBLEM IS HERE!!!
//   
javax.net.ssl.SSLSocketFactory socketFactory = context.getSocketFactory();

正如您在最后一行中看到的，它从 javax.net.ssl 包中提供了一个 SSLSocketFactory。但是 AsyncHTTPClient 实例需要

asyncHTTPClient.setSSLSocketFactory(cz.msebera.android.httpclient.conn.ssl.SSLSocketFactory)

编辑:

我的服务器使用的是自签名证书。

Answer 1

如你所见here , setSSLFactory 需要一个SSLFactory 的对象，因此您可以创建自己的MySSLFactory 类。在下面的示例中，我将其重命名为 MyCustomSSLFactory。 SSL Validaton 的代码在 X509TrustManager 的方法 checkServerTrusted 中。如果需要，您可以根据需要对其进行修改。

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import cz.msebera.android.httpclient.HttpVersion;
import cz.msebera.android.httpclient.conn.ClientConnectionManager;
import cz.msebera.android.httpclient.conn.scheme.PlainSocketFactory;
import cz.msebera.android.httpclient.conn.scheme.Scheme;
import cz.msebera.android.httpclient.conn.scheme.SchemeRegistry;
import cz.msebera.android.httpclient.conn.ssl.SSLSocketFactory;
import cz.msebera.android.httpclient.impl.client.DefaultHttpClient;
import cz.msebera.android.httpclient.impl.conn.tsccm.ThreadSafeClientConnManager;
import cz.msebera.android.httpclient.params.BasicHttpParams;
import cz.msebera.android.httpclient.params.HttpParams;
import cz.msebera.android.httpclient.params.HttpProtocolParams;
import cz.msebera.android.httpclient.protocol.HTTP;


/**
 * Created by prerak on 15/03/2017.
 */

public class MyCustomSSLFactory extends SSLSocketFactory {
    final SSLContext sslContext = SSLContext.getInstance("TLS");

    /**
     * Creates a new SSL Socket Factory with the given KeyStore.
     *
     * @param truststore A KeyStore to create the SSL Socket Factory in context of
     * @throws NoSuchAlgorithmException  NoSuchAlgorithmException
     * @throws KeyManagementException    KeyManagementException
     * @throws KeyStoreException         KeyStoreException
     * @throws UnrecoverableKeyException UnrecoverableKeyException
     */
    public MyCustomSSLFactory(KeyStore truststore) throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
        super(truststore);

        X509TrustManager tm = new X509TrustManager() {
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                try {
                    chain[0].checkValidity();
                } catch (Exception e) {
                    throw new CertificateException("Certificate not valid or trusted.");
                }
            }

            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };

        sslContext.init(null, new TrustManager[]{tm}, null);
    }

    /**
     * Gets a KeyStore containing the Certificate
     *
     * @param cert InputStream of the Certificate
     * @return KeyStore
     */
    public static KeyStore getKeystoreOfCA(InputStream cert) {

        // Load CAs from an InputStream
        InputStream caInput = null;
        Certificate ca = null;
        try {
            CertificateFactory cf = CertificateFactory.getInstance("X.509");
            caInput = new BufferedInputStream(cert);
            ca = cf.generateCertificate(caInput);
        } catch (CertificateException e1) {
            e1.printStackTrace();
        } finally {
            try {
                if (caInput != null) {
                    caInput.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        // Create a KeyStore containing our trusted CAs
        String keyStoreType = KeyStore.getDefaultType();
        KeyStore keyStore = null;
        try {
            keyStore = KeyStore.getInstance(keyStoreType);
            keyStore.load(null, null);
            keyStore.setCertificateEntry("ca", ca);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return keyStore;
    }

    /**
     * Gets a Default KeyStore
     *
     * @return KeyStore
     */
    public static KeyStore getKeystore() {
        KeyStore trustStore = null;
        try {
            trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
            trustStore.load(null, null);
        } catch (Throwable t) {
            t.printStackTrace();
        }
        return trustStore;
    }

    /**
     * Returns a SSlSocketFactory which trusts all certificates
     *
     * @return SSLSocketFactory
     */
    public static SSLSocketFactory getFixedSocketFactory() {
        SSLSocketFactory socketFactory;
        try {
            socketFactory = new MyCustomSSLFactory(getKeystore());
            socketFactory.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
        } catch (Throwable t) {
            t.printStackTrace();
            socketFactory = SSLSocketFactory.getSocketFactory();
        }
        return socketFactory;
    }

    /**
     * Gets a DefaultHttpClient which trusts a set of certificates specified by the KeyStore
     *
     * @param keyStore custom provided KeyStore instance
     * @return DefaultHttpClient
     */
    public static DefaultHttpClient getNewHttpClient(KeyStore keyStore) {

        try {
            SSLSocketFactory sf = new MyCustomSSLFactory(keyStore);
            SchemeRegistry registry = new SchemeRegistry();
            registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
            registry.register(new Scheme("https", sf, 443));

            HttpParams params = new BasicHttpParams();
            HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
            HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);

            ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);

            return new DefaultHttpClient(ccm, params);
        } catch (Exception e) {
            return new DefaultHttpClient();
        }
    }

    @Override
    public Socket createSocket(Socket socket, String host, int port, boolean autoClose) throws IOException {
        return sslContext.getSocketFactory().createSocket(socket, host, port, autoClose);
    }

    @Override
    public Socket createSocket() throws IOException {
        return sslContext.getSocketFactory().createSocket();
    }

    /**
     * Makes HttpsURLConnection trusts a set of certificates specified by the KeyStore
     */
    public void fixHttpsURLConnection() {
        HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
    }
}

现在您可以通过将自定义 KeyStore 传递给它来初始化 MyCustomSSLSocketFactory 的对象。

MyCustomSSLFactory socketFactory = new MyCustomSSLFactory(keyStore);

现在您可以将套接字工厂设置为:

asyncHTTPClient.setSSLSocketFactory(socketFactory);