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_ENCRYPTER_H_ 6 #define NET_QUIC_CRYPTO_NULL_ENCRYPTER_H_ 7 8 #include "base/compiler_specific.h" 9 #include "net/base/net_export.h" 10 #include "net/quic/crypto/quic_encrypter.h" 11 12 namespace net { 13 14 // A NullEncrypter is a QuicEncrypter used before a crypto negotiation 15 // has occurred. It does not actually encrypt the payload, but does 16 // generate a MAC (fnv128) over both the payload and associated data. 17 class NET_EXPORT_PRIVATE NullEncrypter : public QuicEncrypter { 18 public: 19 NullEncrypter(); 20 virtual ~NullEncrypter() {} 21 22 // QuicEncrypter implementation 23 virtual bool SetKey(base::StringPiece key) OVERRIDE; 24 virtual bool SetNoncePrefix(base::StringPiece nonce_prefix) OVERRIDE; 25 virtual bool Encrypt(base::StringPiece nonce, 26 base::StringPiece associated_data, 27 base::StringPiece plaintext, 28 unsigned char* output) OVERRIDE; 29 virtual QuicData* EncryptPacket(QuicPacketSequenceNumber sequence_number, 30 base::StringPiece associated_data, 31 base::StringPiece plaintext) OVERRIDE; 32 virtual size_t GetKeySize() const OVERRIDE; 33 virtual size_t GetNoncePrefixSize() const OVERRIDE; 34 virtual size_t GetMaxPlaintextSize(size_t ciphertext_size) const OVERRIDE; 35 virtual size_t GetCiphertextSize(size_t plaintext_size) const OVERRIDE; 36 virtual base::StringPiece GetKey() const OVERRIDE; 37 virtual base::StringPiece GetNoncePrefix() const OVERRIDE; 38 39 private: 40 size_t GetHashLength() const; 41 }; 42 43 } // namespace net 44 45 #endif // NET_QUIC_CRYPTO_NULL_ENCRYPTER_H_ 46
