diff --git a/keystore/KeystoreResponse.cpp b/keystore/KeystoreResponse.cpp
new file mode 100644
index 0000000..c46973a
--- /dev/null
+++ b/keystore/KeystoreResponse.cpp
@@ -0,0 +1,43 @@
+/*
+**
+** Copyright 2018, 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.
+*/
+
+#include <binder/Parcel.h>
+#include <keystore/keymaster_types.h>
+#include <utility>
+#include <utils/String16.h>
+
+#include "include/keystore/KeystoreResponse.h"
+
+namespace android {
+namespace security {
+namespace keystore {
+
+status_t KeystoreResponse::readFromParcel(const Parcel* in) {
+    auto rc = in->readInt32(&response_code_);
+    if (rc != NO_ERROR) return rc;
+    return in->readString16(&error_msg_);
+}
+
+status_t KeystoreResponse::writeToParcel(Parcel* out) const {
+    auto rc = out->writeInt32(response_code_);
+    if (rc != NO_ERROR) return rc;
+    return out->writeString16(error_msg_);
+}
+
+}  // namespace keystore
+}  // namespace security
+}  // namespace android