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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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