1*e7b1675dSTing-Kang Chang // Copyright 2017 Google Inc. 2*e7b1675dSTing-Kang Chang // 3*e7b1675dSTing-Kang Chang // Licensed under the Apache License, Version 2.0 (the "License"); 4*e7b1675dSTing-Kang Chang // you may not use this file except in compliance with the License. 5*e7b1675dSTing-Kang Chang // You may obtain a copy of the License at 6*e7b1675dSTing-Kang Chang // 7*e7b1675dSTing-Kang Chang // http://www.apache.org/licenses/LICENSE-2.0 8*e7b1675dSTing-Kang Chang // 9*e7b1675dSTing-Kang Chang // Unless required by applicable law or agreed to in writing, software 10*e7b1675dSTing-Kang Chang // distributed under the License is distributed on an "AS IS" BASIS, 11*e7b1675dSTing-Kang Chang // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12*e7b1675dSTing-Kang Chang // See the License for the specific language governing permissions and 13*e7b1675dSTing-Kang Chang // limitations under the License. 14*e7b1675dSTing-Kang Chang // 15*e7b1675dSTing-Kang Chang /////////////////////////////////////////////////////////////////////////////// 16*e7b1675dSTing-Kang Chang 17*e7b1675dSTing-Kang Chang #ifndef TINK_SUBTLE_RANDOM_H_ 18*e7b1675dSTing-Kang Chang #define TINK_SUBTLE_RANDOM_H_ 19*e7b1675dSTing-Kang Chang 20*e7b1675dSTing-Kang Chang #include <memory> 21*e7b1675dSTing-Kang Chang #include <string> 22*e7b1675dSTing-Kang Chang 23*e7b1675dSTing-Kang Chang #include "tink/util/secret_data.h" 24*e7b1675dSTing-Kang Chang #include "tink/util/status.h" 25*e7b1675dSTing-Kang Chang 26*e7b1675dSTing-Kang Chang namespace crypto { 27*e7b1675dSTing-Kang Chang namespace tink { 28*e7b1675dSTing-Kang Chang namespace subtle { 29*e7b1675dSTing-Kang Chang 30*e7b1675dSTing-Kang Chang class Random { 31*e7b1675dSTing-Kang Chang public: 32*e7b1675dSTing-Kang Chang // Fills the given `buffer` with random bytes. 33*e7b1675dSTing-Kang Chang static util::Status GetRandomBytes(absl::Span<char> buffer); 34*e7b1675dSTing-Kang Chang // Returns a random string of desired length. 35*e7b1675dSTing-Kang Chang static std::string GetRandomBytes(size_t length); 36*e7b1675dSTing-Kang Chang static uint32_t GetRandomUInt32(); 37*e7b1675dSTing-Kang Chang static uint16_t GetRandomUInt16(); 38*e7b1675dSTing-Kang Chang static uint8_t GetRandomUInt8(); 39*e7b1675dSTing-Kang Chang // Returns length bytes of random data stored in specialized key container. 40*e7b1675dSTing-Kang Chang static util::SecretData GetRandomKeyBytes(size_t length); 41*e7b1675dSTing-Kang Chang }; 42*e7b1675dSTing-Kang Chang 43*e7b1675dSTing-Kang Chang } // namespace subtle 44*e7b1675dSTing-Kang Chang } // namespace tink 45*e7b1675dSTing-Kang Chang } // namespace crypto 46*e7b1675dSTing-Kang Chang 47*e7b1675dSTing-Kang Chang #endif // TINK_SUBTLE_RANDOM_H_ 48