Add Android support

plugin.xml

@@ -54,5 +54,13 @@
         <source-file src="src/ios/QNSURLSessionDemux.m" />
 
     </platform>
-
+  <platform name="android">
+    <config-file target="res/xml/config.xml" parent="/*">
+      <feature name="ClientCertificate">
+        <param name="android-package" value="org.apache.cordova.plugin.clientcert.ClientCertificate"/>
+        <param name="onload" value="true" />
+      </feature>
+    </config-file>
+    <source-file src="src/android/ClientCertificate.java" target-dir="src/org/apache/cordova/plugin/"/>
+  </platform>
 </plugin>

src/android/ClientCertificate.java

@@ -0,0 +1,93 @@
+
+package org.apache.cordova.plugin.clientcert;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.os.Build;
+import android.preference.PreferenceManager;
+import android.security.KeyChain;
+import android.security.KeyChainAliasCallback;
+import android.security.KeyChainException;
+import android.util.Log;
+import android.widget.Toast;
+import org.apache.cordova.CordovaPlugin;
+import org.apache.cordova.CordovaWebView;
+import org.apache.cordova.ICordovaClientCertRequest;
+import org.apache.cordova.CallbackContext;
+import org.apache.cordova.CordovaPlugin;
+import org.apache.cordova.CordovaInterface;
+import org.json.JSONObject;
+import org.json.JSONArray;
+import org.json.JSONException;
+import java.security.PrivateKey;
+import java.security.cert.X509Certificate;
+import java.util.concurrent.ExecutorService;
+import java.security.KeyStore;
+import java.security.PrivateKey;
+import java.security.cert.CertificateFactory;
+import java.util.Collection;
+import java.util.Arrays;
+import java.util.Enumeration;
+import java.io.FileInputStream;
+import java.io.InputStream;
+
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+public class ClientCertificate extends CordovaPlugin {
+
+
+    public String p12path = "";
+    public String p12password = "";
+
+
+    @Override
+    public Boolean shouldAllowBridgeAccess(String url) {
+        return super.shouldAllowBridgeAccess(url);
+    }
+  @Override
+    public void initialize(CordovaInterface cordova, CordovaWebView webView) {
+        super.initialize(cordova, webView);
+
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @Override
+    public boolean onReceivedClientCertRequest(CordovaWebView view, ICordovaClientCertRequest request) {
+      try {
+                KeyStore keystore = KeyStore.getInstance("PKCS12");
+
+                InputStream astream = cordova.getActivity().getApplicationContext().getAssets().open(p12path);
+                keystore.load(astream, p12password.toCharArray());
+                astream.close();
+                Enumeration e = keystore.aliases();
+                if (e.hasMoreElements()) {
+                    String ealias = (String) e.nextElement();
+                    PrivateKey key = (PrivateKey) keystore.getKey(ealias, p12password.toCharArray());
+                    java.security.cert.Certificate[]  chain = keystore.getCertificateChain(ealias);
+                    X509Certificate[] certs = Arrays.copyOf(chain, chain.length, X509Certificate[].class);
+                    request.proceed(key,certs);
+                } else
+                {
+                    request.ignore();
+                }
+
+            } catch (Exception ex)
+            {
+                request.ignore();
+            }
+        return true;
+    }
+
+    @Override
+    public boolean execute(String action, JSONArray a, CallbackContext c) throws JSONException {
+        if (action.equals("register"))
+        {
+            p12path = "www/" + a.getString(0);
+            p12password = a.getString(1);
+            return true;
+        }
+        return false;
+    }
+
+
+}