upload android base code part6

android/system/keymaster/kdf1.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2015 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.
+ */
+
+#ifndef SYSTEM_KEYMASTER_KDF1_H_
+#define SYSTEM_KEYMASTER_KDF1_H_
+
+#include "iso18033kdf.h"
+
+#include <hardware/keymaster_defs.h>
+
+#include <keymaster/serializable.h>
+
+#include <keymaster/UniquePtr.h>
+
+namespace keymaster {
+
+/**
+ * Kdf1 is instance of Iso18033Kdf when the counter starts at 0.
+ */
+class Kdf1 : public Iso18033Kdf {
+  public:
+    Kdf1() : Iso18033Kdf(0) {}
+};
+
+}  // namespace keymaster
+
+#endif  // SYSTEM_KEYMASTER_KDF1_H_