How to use self-signed SSL in android network library (ION)?

Question

Using this network library:

https://github.com/koush/ion

As the current status is development, I would like to use self-signed SSL cert

The library forum has some discussion:

https://github.com/koush/ion/issues/3

 Ion ion = Ion.getDefault(c);
    ion.configure().createSSLContext("TLS");
    ion.getHttpClient().getSSLSocketMiddleware().setSSLContext(sslContext);
    ion.getHttpClient().getSSLSocketMiddleware().setTrustManagers(trustManagers);

After some studies , I have grab the crt and getting sslContext and trustmanager, the problem is , it still return exception

javax.net.ssl.SSLException
Caused by: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.

Here is my attempt :

    try {
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        InputStream caInput = getResources().openRawResource(R.raw.load);
        Certificate ca;
        try {
            ca = cf.generateCertificate(caInput);
            //System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());
        } finally {
            caInput.close();
        }

        String keyStoreType = KeyStore.getDefaultType();
        KeyStore keyStore = KeyStore.getInstance(keyStoreType);
        keyStore.load(null, null);
        keyStore.setCertificateEntry("ca", ca);

        String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
        tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
        tmf.init(keyStore);

        ssl_context = SSLContext.getInstance("TLS");
        ssl_context.init(null, tmf.getTrustManagers(), null);
    } catch (Exception e) {
        Log.d("test1", "A: " + e);
    }

    Ion.getDefault(this).getHttpClient().getSSLSocketMiddleware().setTrustManagers(tmf.getTrustManagers());
    Ion.getDefault(this).getHttpClient().getSSLSocketMiddleware().setSSLContext(ssl_context);

    //test SSL
    Ion.getDefault(this).with(this)
            .load("https://na2b.no-ip.com/dragonair/can_app/api/media_list.php")
            .asJsonObject()
            .setCallback(new FutureCallback<JsonObject>() {
                @Override
                public void onCompleted(Exception e, JsonObject result) {
                    if (e != null) {
                        Log.d("test1", "B: " + e);
                    } else {
                        Log.d("test1", "result" + result);
                    }
                }
            });

notice that the exception is at the B: part so that means trustmanager and SSLcontext should build correctly, how to fix that?

Thanks for helping.

Answer 1

For your issue, IMO, you can refer to my following sample code. I have tested with my web service (Asp.Net WebAPI). Hope it helps!

public class MainActivity extends AppCompatActivity {

    private Context mContext = this;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        try {
            CertificateFactory cf = CertificateFactory.getInstance("X.509");
            // cert file stored in \app\src\main\res\raw
            InputStream caInput = getResources().openRawResource(R.raw.your_cert);

            Certificate ca = cf.generateCertificate(caInput);
            caInput.close();

            KeyStore keyStore = KeyStore.getInstance("BKS");
            keyStore.load(null, null);
            keyStore.setCertificateEntry("ca", ca);

            String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
            TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
            tmf.init(keyStore);

            TrustManager[] wrappedTrustManagers = getWrappedTrustManagers(tmf.getTrustManagers());

            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, wrappedTrustManagers, null);

            AsyncSSLSocketMiddleware sslMiddleWare = Ion.getDefault(mContext).getHttpClient().getSSLSocketMiddleware();
            sslMiddleWare.setTrustManagers(wrappedTrustManagers);
            sslMiddleWare.setHostnameVerifier(getHostnameVerifier());
            sslMiddleWare.setSSLContext(sslContext);

            // Post application/x-www-form-urlencoded and read a String
            Ion.with(mContext)
                    .load("https://yourserver/token")
                    .setBodyParameter("grant_type", "password")
                    .setBodyParameter("username", "bnk")
                    .setBodyParameter("password", "bnk123456789")
                    .asString()
                    .setCallback(new FutureCallback<String>() {
                        @Override
                        public void onCompleted(Exception e, String result) {
                            if (result != null) {
                                Log.i("ionSample", result);
                            } else if (e != null) {
                                e.printStackTrace();
                            }
                        }
                    });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private HostnameVerifier getHostnameVerifier() {
        return new HostnameVerifier() {
            @Override
            public boolean verify(String hostname, SSLSession session) {
                return true;
                // or the following:
                // HostnameVerifier hv = HttpsURLConnection.getDefaultHostnameVerifier();
                // return hv.verify("www.yourserver.com", session);
            }
        };
    }

    private TrustManager[] getWrappedTrustManagers(TrustManager[] trustManagers) {
        final X509TrustManager originalTrustManager = (X509TrustManager) trustManagers[0];
        return new TrustManager[]{
                new X509TrustManager() {
                    public X509Certificate[] getAcceptedIssuers() {
                        return originalTrustManager.getAcceptedIssuers();
                    }

                    public void checkClientTrusted(X509Certificate[] certs, String authType) {
                        try {
                            if (certs != null && certs.length > 0){
                                certs[0].checkValidity();
                            } else {
                                originalTrustManager.checkClientTrusted(certs, authType);
                            }
                        } catch (CertificateException e) {
                            Log.w("checkClientTrusted", e.toString());
                        }
                    }

                    public void checkServerTrusted(X509Certificate[] certs, String authType) {
                        try {
                            if (certs != null && certs.length > 0){
                                certs[0].checkValidity();
                            } else {
                                originalTrustManager.checkServerTrusted(certs, authType);
                            }
                        } catch (CertificateException e) {
                            Log.w("checkServerTrusted", e.toString());
                        }
                    }
                }
        };
    }   
}

Logcat output:

I/ionSample: {"access_token":"oS1SHxck8TzidTL...P-_6VFjRlDsjF9_A0JONu59rzYOVQV...ka78pHSvRPB5YrrBlHsF562Ay__Jd0MDfpOB0SRML2N8O3XPZK8woV4vjASzfGEzi7KJMmY8pkM_-P9ohHhWPD3PtgRahiqTUSapdpg6n197uJxdQWyU","token_type":"bearer","expires_in":2591999,"userName":"bnk",".issued":"Wed, 06 Jan 2016 06:26:45 GMT",".expires":"Fri, 05 Feb 2016 06:26:45 GMT"}