diff --git a/drm/common/IDrmIOService.cpp b/drm/common/IDrmIOService.cpp
new file mode 100644
index 0000000..7ce45e7
--- /dev/null
+++ b/drm/common/IDrmIOService.cpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_NDEBUG 0
+#define LOG_TAG "IDrmIOService"
+#include <utils/Log.h>
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <binder/Parcel.h>
+#include <binder/IPCThreadState.h>
+#include <drm/drm_framework_common.h>
+#include "IDrmIOService.h"
+
+using namespace android;
+
+void BpDrmIOService::writeToFile(const String8& filePath, const String8& dataBuffer) {
+    Parcel data, reply;
+
+    data.writeInterfaceToken(IDrmIOService::getInterfaceDescriptor());
+    data.writeString8(filePath);
+    data.writeString8(dataBuffer);
+
+    remote()->transact(WRITE_TO_FILE, data, &reply);
+}
+
+String8 BpDrmIOService::readFromFile(const String8& filePath) {
+
+    Parcel data, reply;
+
+    data.writeInterfaceToken(IDrmIOService::getInterfaceDescriptor());
+    data.writeString8(filePath);
+
+    remote()->transact(READ_FROM_FILE, data, &reply);
+    return reply.readString8();
+}
+
+IMPLEMENT_META_INTERFACE(DrmIOService, "drm.IDrmIOService");
+
+status_t BnDrmIOService::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
+
+    switch (code) {
+    case WRITE_TO_FILE:
+    {
+        CHECK_INTERFACE(IDrmIOService, data, reply);
+
+        writeToFile(data.readString8(), data.readString8());
+        return DRM_NO_ERROR;
+    }
+
+    case READ_FROM_FILE:
+    {
+        CHECK_INTERFACE(IDrmIOService, data, reply);
+
+        String8 dataBuffer = readFromFile(data.readString8());
+        reply->writeString8(dataBuffer);
+        return DRM_NO_ERROR;
+    }
+
+    default:
+        return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+