diff -r 000000000000 -r 6474c204b198 mobile/android/base/background/nativecode/NativeCrypto.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/background/nativecode/NativeCrypto.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.background.nativecode;
+
+import java.security.GeneralSecurityException;
+
+import org.mozilla.gecko.AppConstants;
+import org.mozilla.gecko.mozglue.RobocopTarget;
+
+import android.util.Log;
+
+@RobocopTarget
+public class NativeCrypto {
+  static {
+    try {
+      System.loadLibrary("mozglue");
+    } catch (UnsatisfiedLinkError e) {
+      Log.wtf("NativeCrypto", "Couldn't load mozglue. Trying /data/app-lib path.");
+      try {
+        System.load("/data/app-lib/" + AppConstants.ANDROID_PACKAGE_NAME + "/libmozglue.so");
+      } catch (Throwable ee) {
+          try {
+            Log.wtf("NativeCrypto", "Couldn't load mozglue: " + ee + ". Trying /data/data path.");
+            System.load("/data/data/" + AppConstants.ANDROID_PACKAGE_NAME + "/lib/libmozglue.so");
+          } catch (UnsatisfiedLinkError eee) {
+              Log.wtf("NativeCrypto", "Failed every attempt to load mozglue. Giving up.");
+              throw new RuntimeException("Unable to load mozglue", eee);
+          }
+      }
+    }
+  }
+
+  /**
+   * Wrapper to perform PBKDF2-HMAC-SHA-256 in native code.
+   */
+  public native static byte[] pbkdf2SHA256(byte[] password, byte[] salt, int c, int dkLen)
+      throws GeneralSecurityException;
+
+  /**
+   * Wrapper to perform SHA-1 in native code.
+   */
+  public native static byte[] sha1(byte[] str);
+}