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| 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 #ifndef NET_QUIC_CRYPTO_QUIC_RANDOM_H_ | |
| 6 #define NET_QUIC_CRYPTO_QUIC_RANDOM_H_ | |
| 7 | |
| 8 #include <stddef.h> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "net/base/net_export.h" | |
| 12 | |
| 13 namespace net { | |
| 14 | |
| 15 // The interface for a random number generator. | |
| 16 class NET_EXPORT_PRIVATE QuicRandom { | |
| 17 public: | |
| 18 virtual ~QuicRandom() {} | |
| 19 | |
| 20 // Returns the default random number generator, which is cryptographically | |
| 21 // secure and thread-safe. | |
| 22 static QuicRandom* GetInstance(); | |
| 23 | |
| 24 // Generates |len| random bytes in the |data| buffer. | |
| 25 virtual void RandBytes(void* data, size_t len) = 0; | |
| 26 | |
| 27 // Returns a random number in the range [0, kuint64max]. | |
| 28 virtual uint64 RandUint64() = 0; | |
| 29 | |
| 30 // Reseeds the random number generator with additional entropy input. | |
| 31 // NOTE: the constructor of a QuicRandom object is responsible for seeding | |
| 32 // itself with enough entropy input. | |
| 33 virtual void Reseed(const void* additional_entropy, size_t entropy_len) = 0; | |
| 34 }; | |
| 35 | |
| 36 } // namespace net | |
| 37 | |
| 38 #endif // NET_QUIC_CRYPTO_QUIC_RANDOM_H_ | |
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