diff -r 000000000000 -r 6474c204b198 security/manager/ssl/src/nsRandomGenerator.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/manager/ssl/src/nsRandomGenerator.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,48 @@
+/* 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/. */
+
+#include "nsRandomGenerator.h"
+#include "pk11pub.h"
+#include "secerr.h"
+#include "prerror.h"
+#include "nsNSSComponent.h"
+
+////////////////////////////////////////////////////////////////////////////////
+//// nsRandomGenerator
+
+NS_IMPL_ISUPPORTS(nsRandomGenerator, nsIRandomGenerator)
+
+////////////////////////////////////////////////////////////////////////////////
+//// nsIRandomGenerator
+
+/* void generateRandomBytes(in unsigned long aLength,
+                            [retval, array, size_is(aLength)] out octet aBuffer) */
+NS_IMETHODIMP
+nsRandomGenerator::GenerateRandomBytes(uint32_t aLength,
+                                       uint8_t **aBuffer)
+{
+  NS_ENSURE_ARG_POINTER(aBuffer);
+  *aBuffer = nullptr;
+
+  mozilla::ScopedPK11SlotInfo slot(PK11_GetInternalSlot());
+  if (!slot) {
+    return NS_ERROR_FAILURE;
+  }
+
+  uint8_t *buf = reinterpret_cast<uint8_t *>(NS_Alloc(aLength));
+  if (!buf) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  SECStatus srv = PK11_GenerateRandomOnSlot(slot, buf, aLength);
+
+  if (SECSuccess != srv) {
+    NS_Free(buf);
+    return NS_ERROR_FAILURE;
+  }
+
+  *aBuffer = buf;
+
+  return NS_OK;
+}