1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "net/quic/crypto/quic_random.h" 6 7 #include "base/logging.h" 8 #include "base/memory/singleton.h" 9 #include "crypto/random.h" 10 11 namespace net { 12 13 namespace { 14 15 class DefaultRandom : public QuicRandom { 16 public: 17 static DefaultRandom* GetInstance(); 18 19 // QuicRandom implementation 20 virtual void RandBytes(void* data, size_t len) OVERRIDE; 21 virtual uint64 RandUint64() OVERRIDE; 22 virtual void Reseed(const void* additional_entropy, 23 size_t entropy_len) OVERRIDE; 24 25 private: 26 DefaultRandom(); 27 virtual ~DefaultRandom() {} 28 29 friend struct DefaultSingletonTraits<DefaultRandom>; 30 DISALLOW_COPY_AND_ASSIGN(DefaultRandom); 31 }; 32 33 DefaultRandom* DefaultRandom::GetInstance() { 34 return Singleton<DefaultRandom>::get(); 35 } 36 37 void DefaultRandom::RandBytes(void* data, size_t len) { 38 crypto::RandBytes(data, len); 39 } 40 41 uint64 DefaultRandom::RandUint64() { 42 uint64 value; 43 RandBytes(&value, sizeof(value)); 44 return value; 45 } 46 47 void DefaultRandom::Reseed(const void* additional_entropy, size_t entropy_len) { 48 // No such function exists in crypto/random.h. 49 } 50 51 DefaultRandom::DefaultRandom() { 52 } 53 54 } // namespace 55 56 // static 57 QuicRandom* QuicRandom::GetInstance() { return DefaultRandom::GetInstance(); } 58 59 } // namespace net 60
