Refactor keystore.
This CL isn't nearly as big as it looks. It doesn't change keystore
functionality, it just moves all of the classes out of the former
keystore.cpp into their own .h and .cpp files.
Note that this is a cherry-pick from:
https://android-review.googlesource.com/#/c/194971
Change-Id: Ide326c4f1d03984994d1bd9a76fa68d37da230dc
diff --git a/keystore/entropy.h b/keystore/entropy.h
new file mode 100644
index 0000000..0e4d1b2
--- /dev/null
+++ b/keystore/entropy.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2016 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 KEYSTORE_ENTROPY_H_
+#define KEYSTORE_ENTROPY_H_
+
+#include <stdint.h>
+
+class Entropy {
+ public:
+ Entropy() : mRandom(-1) {}
+ ~Entropy();
+
+ bool open();
+ bool generate_random_data(uint8_t* data, size_t size) const;
+
+ private:
+ int mRandom;
+};
+
+#endif // KEYSTORE_ENTROPY_H_