使用 Retrofit 2 获取 SSLException

Question

我正在创建授权应用程序，我正在使用 Retrofit 2。当我进行调用时，它会转到 onFailure 方法并出现异常

"javax.net.ssl.SSLException: Connection closed by peer"

但问题是，昨天这很管用。今天它给出了例外。我在互联网上找到了一些 , or this How to add TLS v 1.0 and TLS v.1.1 with Retrofit，但这对我没有帮助。任何想法如何解决它。在后端启用 TLS1.2。

public class RegistrationFragment extends BaseFragment {
View mainView;

ApiClient apiClient = ApiClient.getInstance();

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    mainView = inflater.inflate
            (R.layout.registration_fragment, container, false);

            //Calling the authorization method
            registerCall();
        }
    });

    return mainView;
}

//User authorization method

public void registerCall() {

    Call<ResponseBody> call = apiClient.registration(supportopObj);
    call.enqueue(new Callback<ResponseBody>() {
        @Override
        public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
            if (response.isSuccessful()) {

                //Calling the clientCall method for getting the user clientID and clientSecret
                Toast.makeText(getActivity(), "Registration Successful ",
                        Toast.LENGTH_SHORT).show();;

            } else {
                //if the response not successful
                Toast.makeText(getActivity(), "Could not register the user maybe already registered ",
                        Toast.LENGTH_SHORT).show();
            }
        }

        @Override
        public void onFailure(Call<ResponseBody> call, Throwable t) {
            Toast.makeText(getActivity(), "An error occurred", Toast.LENGTH_SHORT).show();
        }
    });
}
}

Answer 1

不是因为Retrofit，而是因为okhttp。如果你使用 okhttp version 3.x ，你会遇到这个问题。直接的解决方案是使用 okhttp 版本 2.x。要补充的另一件事是，此问题仅发生在 Android 版本 16-20 Link for reference

Answer 2

我在我的 OkHttp 初始化中使用了类似的东西 class，但是在这里使用安全吗？

我创建了一个新的classTls12SocketFactory.class

在这儿。

public class Tls12SocketFactory extends SSLSocketFactory {
private static final String[] TLS_V12_ONLY = {"TLSv1.2"};

final SSLSocketFactory delegate;

public Tls12SocketFactory(SSLSocketFactory base) {
    this.delegate = base;
}

@Override
public String[] getDefaultCipherSuites() {
    return delegate.getDefaultCipherSuites();
}

@Override
public String[] getSupportedCipherSuites() {
    return delegate.getSupportedCipherSuites();
}

@Override
public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
    return patch(delegate.createSocket(s, host, port, autoClose));
}

@Override
public Socket createSocket(String host, int port) throws IOException, UnknownHostException {
    return patch(delegate.createSocket(host, port));
}

@Override
public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException, UnknownHostException {
    return patch(delegate.createSocket(host, port, localHost, localPort));
}

@Override
public Socket createSocket(InetAddress host, int port) throws IOException {
    return patch(delegate.createSocket(host, port));
}

@Override
public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException {
    return patch(delegate.createSocket(address, port, localAddress, localPort));
}

private Socket patch(Socket s) {
    if (s instanceof SSLSocket) {
        ((SSLSocket) s).setEnabledProtocols(TLS_V12_ONLY);
    }
    return s;
}
}

我在 OkHttp 初始化中做了类似的事情 class。

X509TrustManager trustManager = null;

    try {
        TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
        trustManagerFactory.init((KeyStore) null);
        TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
        if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {
            throw new IllegalStateException("Unexpected default trust managers:" + Arrays.toString(trustManagers));
        }
         trustManager = (X509TrustManager) trustManagers[0];
    } catch (KeyStoreException | NoSuchAlgorithmException e) {
        e.printStackTrace();
    }

    OkHttpClient.Builder client = new OkHttpClient.Builder()
            .readTimeout(10, TimeUnit.SECONDS)
            .connectTimeout(10, TimeUnit.SECONDS)
            .writeTimeout(10, TimeUnit.SECONDS);

    try {
        SSLContext sc = SSLContext.getInstance("TLSv1.2");
        sc.init(null, new TrustManager[] { trustManager }, null);
        client.sslSocketFactory(new Tls12SocketFactory(sc.getSocketFactory()), trustManager);
        ConnectionSpec cs = new ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
                .tlsVersions(TlsVersion.TLS_1_2)
                .build();
        client.connectionSpecs(Collections.singletonList(cs));
    } catch (NoSuchAlgorithmException | KeyManagementException e) {
        e.printStackTrace();
    }

 name = new Retrofit.Builder()
            .baseUrl(endpoint)
            .client(client.build())
            .addConverterFactory(GsonConverterFactory.create())
            .build();

那么在 Android studio 中使用此代码是否安全。而且这段代码将来会不会有任何问题？谢谢你。我想我的回答对其他人也有帮助。

使用 Retrofit 2 获取 SSLException

Getting SSLException using Retrofit 2

android

sslexception

retrofit

tls1.2