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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_NULL_DECRYPTER_H_ | |
| 6 #define NET_QUIC_CRYPTO_NULL_DECRYPTER_H_ | |
| 7 | |
| 8 #include "base/compiler_specific.h" | |
| 9 #include "net/base/net_export.h" | |
| 10 #include "net/quic/crypto/quic_decrypter.h" | |
| 11 | |
| 12 namespace net { | |
| 13 | |
| 14 class QuicDataReader; | |
| 15 | |
| 16 // A NullDecrypter is a QuicDecrypter used before a crypto negotiation | |
| 17 // has occurred. It does not actually decrypt the payload, but does | |
| 18 // verify a hash (fnv128) over both the payload and associated data. | |
| 19 class NET_EXPORT_PRIVATE NullDecrypter : public QuicDecrypter { | |
| 20 public: | |
| 21 NullDecrypter(); | |
| 22 ~NullDecrypter() override {} | |
| 23 | |
| 24 // QuicDecrypter implementation | |
| 25 bool SetKey(base::StringPiece key) override; | |
| 26 bool SetNoncePrefix(base::StringPiece nonce_prefix) override; | |
| 27 bool DecryptPacket(QuicPacketSequenceNumber sequence_number, | |
| 28 const base::StringPiece& associated_data, | |
| 29 const base::StringPiece& ciphertext, | |
| 30 char* output, | |
| 31 size_t* output_length, | |
| 32 size_t max_output_length) override; | |
| 33 base::StringPiece GetKey() const override; | |
| 34 base::StringPiece GetNoncePrefix() const override; | |
| 35 | |
| 36 private: | |
| 37 bool ReadHash(QuicDataReader* reader, uint128* hash); | |
| 38 uint128 ComputeHash(const base::StringPiece& data1, | |
| 39 const base::StringPiece& data2) const; | |
| 40 | |
| 41 DISALLOW_COPY_AND_ASSIGN(NullDecrypter); | |
| 42 }; | |
| 43 | |
| 44 } // namespace net | |
| 45 | |
| 46 #endif // NET_QUIC_CRYPTO_NULL_DECRYPTER_H_ | |
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