1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef KEYSTORE_ENTROPY_H_
18 #define KEYSTORE_ENTROPY_H_
19 
20 #include <stdint.h>
21 
22 class Entropy {
23   public:
24     Entropy() : mRandom(-1) {}
25     ~Entropy();
26 
27     bool open();
28     bool generate_random_data(uint8_t* data, size_t size) const;
29 
30   private:
31     int mRandom;
32 };
33 
34 #endif  // KEYSTORE_ENTROPY_H_
35