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