SSL Pinning with Volley network library on Android

Question

I want to use SSL Pinning in volley network library. Is there any way to implement SSL pinning with volley? Does volley provide this support for security improvements?

Answer 1

I am implementing the same exact thing. I found a blog post that will hopefully be of help to you

http://ogrelab.ikratko.com/using-android-volley-with-self-signed-certificate/

Answer 2

I just implemented it like described here: http://blog.ostorlab.co/2016/05/ssl-pinning-in-android-networking.html

Here is the needed code for a volley-implementation:

CertificateFactory cf = CertificateFactory.getInstance("X.509");

// Generate the certificate using the certificate file under res/raw/cert.cer
InputStream caInput = new BufferedInputStream(getResources().openRawResource(R.raw.cert));
Certificate ca = cf.generateCertificate(caInput);
caInput.close();

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

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

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

SSLSocketFactory sf = context.getSocketFactory();
mRequestQueue = Volley.newRequestQueue(mCtx.getApplicationContext(), new HurlStack(null, sf));

Seems to work!

Answer 3

You can use public key pinning instead of certificate pinning:

Public Key Pinning with Volley Library

Answer 4

I just looked into the same thing for a project I am working on. The position I am in may be different to you however.

I am using Volley with an OKHttp Network stack (https://gist.github.com/JakeWharton/5616899):

Add these to your Gradle Build:1

compile "com.squareup.okhttp:okhttp:2.7.5"
compile "com.squareup.okhttp:okhttp-urlconnection:2.7.5"

Add a OKHttpStack class;

public class OKHttpStack extends HurlStack {
    private final OkUrlFactory okUrlFactory;
    public OKHttpStack() {

        this(new OkUrlFactory( 
            new OkHttpClient.Builder()
                    .certificatePinner(
                        new CertificatePinner.Builder()
                            .add("example.com", "sha256/afwiKY3RxoMmLkuRW1l7QsPZTJPwDS2pdDROQjXw8ig=") //This is the cert
                            .build())
                    .build();
        ));
    }
    public OKHttpStack(OkUrlFactory okUrlFactory) {
        if (okUrlFactory == null) {
            throw new NullPointerException("Client must not be null.");
        }
        this.okUrlFactory = okUrlFactory;
    }

    @Override
    protected HttpURLConnection createConnection(URL url) throws IOException {
        return okUrlFactory.open(url);
    }
}

When you then create your RequestQueue do something like:

Network network = new BasicNetwork(new OKHttpStack());
File cacheDir = new File(context.getCacheDir(), "volley");
int threads = 4;
mRequestQueue = new RequestQueue(new DiskBasedCache(cacheDir), network, threads);

Please note I have yet to test this, we are thinking about pinning at the moment.

Good luck! Gav

References:

https://gist.github.com/JakeWharton/5616899 https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/CertificatePinning.java