diff -r 000000000000 -r 6474c204b198 mobile/android/base/sync/jpake/JPakeNumGeneratorRandom.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/sync/jpake/JPakeNumGeneratorRandom.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/* 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.sync.jpake;
+
+import java.math.BigInteger;
+
+import org.mozilla.gecko.sync.Utils;
+
+/**
+ * Helper Function to generate a uniformly random value in [0, r).
+ */
+public class JPakeNumGeneratorRandom implements JPakeNumGenerator {
+
+  @Override
+  public BigInteger generateFromRange(BigInteger r) {
+    return Utils.generateBigIntegerLessThan(r);
+  }
+}