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
11namespace net {
12
13namespace {
14
15class 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
33DefaultRandom* DefaultRandom::GetInstance() {
34  return Singleton<DefaultRandom>::get();
35}
36
37void DefaultRandom::RandBytes(void* data, size_t len) {
38  crypto::RandBytes(data, len);
39}
40
41uint64 DefaultRandom::RandUint64() {
42  uint64 value;
43  RandBytes(&value, sizeof(value));
44  return value;
45}
46
47void 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
54QuicRandom* QuicRandom::GetInstance() { return DefaultRandom::GetInstance(); }
55
56}  // namespace net
57