Self signing certificate: Android and Retrofit

Self signing certificate: Android and Retrofit

Enabling communication with API if server has Self-Signed Certificate

gradle dependencies

dependencies {
    compile 'com.squareup.okhttp:okhttp:2.2.0'
    compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.0'
    compile 'com.squareup.retrofit:retrofit:1.9.0'
}

Implementation

RestAdapter restAdapter = new RestAdapter.Builder()
.setEndpoint(BASE_URL)
.setClient(new OkClient(SelfSigningClientBuilder.createClient()))
.build();

SelfSigningClient

package ch.katzentisch.api;

import com.squareup.okhttp.OkHttpClient;

import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

@SuppressWarnings("unused")
public class SelfSigningClientBuilder {


    @SuppressWarnings("null")
    public static OkHttpClient configureClient(final OkHttpClient client) {
        final TrustManager[] certs = new TrustManager[]{new X509TrustManager() {

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

            @Override
            public void checkServerTrusted(final X509Certificate[] chain,
                                           final String authType) throws CertificateException {
            }

            @Override
            public void checkClientTrusted(final X509Certificate[] chain,
                                           final String authType) throws CertificateException {
            }
        }};

        SSLContext ctx = null;
        try {
            ctx = SSLContext.getInstance("TLS");
            ctx.init(null, certs, new SecureRandom());
        } catch (final java.security.GeneralSecurityException ex) {
        }

        try {
            final HostnameVerifier hostnameVerifier = new HostnameVerifier() {
                @Override
                public boolean verify(final String hostname,
                                      final SSLSession session) {
                    return true;
                }
            };
            client.setHostnameVerifier(hostnameVerifier);
            client.setSslSocketFactory(ctx.getSocketFactory());
        } catch (final Exception e) {
        }

        return client;
    }

    public static OkHttpClient createClient() {
        final OkHttpClient client = new OkHttpClient();
        return configureClient(client);
    }

}