diff --git a/keystore/KeystoreArguments.cpp b/keystore/KeystoreArguments.cpp
new file mode 100644
index 0000000..fe53c29
--- /dev/null
+++ b/keystore/KeystoreArguments.cpp
@@ -0,0 +1,61 @@
+/*
+**
+** Copyright 2017, 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 "include/keystore/KeystoreArguments.h"
+#include "keystore_aidl_hidl_marshalling_utils.h"
+
+#include <binder/Parcel.h>
+
+namespace android {
+namespace security {
+
+using ::android::security::KeystoreArg;
+using ::android::security::KeystoreArguments;
+
+const ssize_t MAX_GENERATE_ARGS = 3;
+status_t KeystoreArguments::readFromParcel(const android::Parcel* in) {
+    ssize_t numArgs = in->readInt32();
+    if (numArgs > MAX_GENERATE_ARGS) {
+        return BAD_VALUE;
+    }
+    if (numArgs > 0) {
+        for (size_t i = 0; i < static_cast<size_t>(numArgs); i++) {
+            ssize_t inSize = in->readInt32();
+            if (inSize >= 0 && static_cast<size_t>(inSize) <= in->dataAvail()) {
+                sp<KeystoreArg> arg = new KeystoreArg(in->readInplace(inSize), inSize);
+                args.push_back(arg);
+            } else {
+                args.push_back(NULL);
+            }
+        }
+    }
+    return OK;
+};
+
+status_t KeystoreArguments::writeToParcel(android::Parcel* out) const {
+    out->writeInt32(args.size());
+    for (sp<KeystoreArg> item : args) {
+        size_t keyLength = item->size();
+        out->writeInt32(keyLength);
+        void* buf = out->writeInplace(keyLength);
+        memcpy(buf, item->data(), keyLength);
+    }
+    return OK;
+}
+
+}  // namespace security
+}  // namespace android