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   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 }  // namespace
  52
  53 // static
  54 QuicRandom* QuicRandom::GetInstance() { return DefaultRandom::GetInstance(); }
  55
  56 }  // namespace net