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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_QUIC_CRYPTO_QUIC_RANDOM_H_
#define NET_QUIC_CRYPTO_QUIC_RANDOM_H_
#include <stddef.h>
#include "base/basictypes.h"
#include "net/base/net_export.h"
namespace net {
// The interface for a random number generator.
class NET_EXPORT_PRIVATE QuicRandom {
public:
virtual ~QuicRandom() {}
// Returns the default random number generator, which is cryptographically
// secure and thread-safe.
static QuicRandom* GetInstance();
// Generates |len| random bytes in the |data| buffer.
virtual void RandBytes(void* data, size_t len) = 0;
// Returns a random number in the range [0, kuint64max].
virtual uint64 RandUint64() = 0;
// Returns a random boolean value.
virtual bool RandBool() = 0;
// Reseeds the random number generator with additional entropy input.
// NOTE: the constructor of a QuicRandom object is responsible for seeding
// itself with enough entropy input.
virtual void Reseed(const void* additional_entropy, size_t entropy_len) = 0;
};
} // namespace net
#endif // NET_QUIC_CRYPTO_QUIC_RANDOM_H_
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