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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 QUICHE_QUIC_CORE_CRYPTO_QUIC_RANDOM_H_
#define QUICHE_QUIC_CORE_CRYPTO_QUIC_RANDOM_H_
#include <cstddef>
#include <cstdint>
#include "quic/platform/api/quic_export.h"
namespace quic {
// The interface for a random number generator.
class QUIC_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_t RandUint64() = 0;
// Generates |len| random bytes in the |data| buffer. This MUST NOT be used
// for any application that requires cryptographically-secure randomness.
virtual void InsecureRandBytes(void* data, size_t len) = 0;
// Returns a random number in the range [0, kuint64max]. This MUST NOT be used
// for any application that requires cryptographically-secure randomness.
virtual uint64_t InsecureRandUint64() = 0;
};
} // namespace quic
#endif // QUICHE_QUIC_CORE_CRYPTO_QUIC_RANDOM_H_