net/quic/crypto/quic_random.cc

   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   void RandBytes(void* data, size_t len) override;
  21   uint64 RandUint64() override;
  22   void Reseed(const void* additional_entropy, size_t entropy_len) override;
  23
  24  private:
  25   DefaultRandom() {};
  26   ~DefaultRandom() override {}
  27
  28   friend struct DefaultSingletonTraits<DefaultRandom>;
  29   DISALLOW_COPY_AND_ASSIGN(DefaultRandom);
  30 };
  31
  32 DefaultRandom* DefaultRandom::GetInstance() {
  33   return Singleton<DefaultRandom>::get();
  34 }
  35
  36 void DefaultRandom::RandBytes(void* data, size_t len) {
  37   crypto::RandBytes(data, len);
  38 }
  39
  40 uint64 DefaultRandom::RandUint64() {
  41   uint64 value;
  42   RandBytes(&value, sizeof(value));
  43   return value;
  44 }
  45
  46 void DefaultRandom::Reseed(const void* additional_entropy, size_t entropy_len) {
  47   // No such function exists in crypto/random.h.
  48 }
  49
  50 }  // namespace
  51
  52 // static
  53 QuicRandom* QuicRandom::GetInstance() { return DefaultRandom::GetInstance(); }
  54
  55 }  // namespace net