Updated repo

src/android/ReadAppSignature.java

@@ -0,0 +1,92 @@
+package cordova.plugin.appSignature;
+
+import org.apache.cordova.CordovaPlugin;
+import org.apache.cordova.CallbackContext;
+import org.apache.cordova.PluginResult;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import android.annotation.SuppressLint;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.Signature;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+
+
+/**
+ * This class echoes a string called from JavaScript.
+ */
+public class ReadAppSignature extends CordovaPlugin {
+
+    @Override
+    public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
+        if (action.equals(Actions.GET_SIGNATURE)) {
+            this.getAppSignature(callbackContext);
+            return true;
+        }
+        return false;
+    }
+
+    private void getAppSignature(CallbackContext callbackContext) {
+        PluginResult pluginResult = new PluginResult(PluginResult.Status.OK, getAppSignature());
+        callbackContext.sendPluginResult(pluginResult);
+    }
+
+    @SuppressLint("PackageManagerGetSignatures")
+    public String getAppSignature() {
+
+        PackageInfo packageInfo;
+        try {
+            packageInfo = cordova.getActivity().getPackageManager().getPackageInfo(
+                    cordova.getActivity().getPackageName(), PackageManager.GET_SIGNATURES);
+
+            //note sample just checks the first signature
+            for (Signature signature : packageInfo.signatures) {
+                // SHA1 the signature
+                LogUtils.LOGD(TAG, "getAppSignature() called : " + getSHA1(signature.toByteArray()));
+                return getSHA1(signature.toByteArray());
+            }
+        } catch (PackageManager.NameNotFoundException e) {
+            e.printStackTrace();
+        }
+        return "";
+    }
+
+    //computed the sha1 hash of the signature
+    public static String getSHA1(byte[] sig) {
+        MessageDigest digest = null;
+        try {
+            digest = MessageDigest.getInstance("SHA1", "BC");
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+        } catch (NoSuchProviderException e) {
+            e.printStackTrace();
+        }
+        digest.update(sig);
+        byte[] hashtext = digest.digest();
+        return bytesToHex(hashtext);
+    }
+
+    //util method to convert byte array to hex string
+    public static String bytesToHex(byte[] bytes) {
+        final char[] hexArray = {'0', '1', '2', '3', '4', '5', '6', '7', '8',
+                '9', 'A', 'B', 'C', 'D', 'E', 'F'};
+        char[] hexChars = new char[bytes.length * 2];
+        int v;
+        for (int j = 0; j < bytes.length; j++) {
+            v = bytes[j] & 0xFF;
+            hexChars[j * 2] = hexArray[v >>> 4];
+            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+        }
+        return new String(hexChars);
+    }
+
+    interface Actions {
+        String GET_SIGNATURE = "getSignature";
+    }
+}