1 // Copyright (c) 2013 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_AES_128_GCM_12_DECRYPTER_H_ 6 #define NET_QUIC_CRYPTO_AES_128_GCM_12_DECRYPTER_H_ 7 8 #include "net/quic/crypto/aead_base_decrypter.h" 9 10 namespace net { 11 12 // An Aes128Gcm12Decrypter is a QuicDecrypter that implements the 13 // AEAD_AES_128_GCM_12 algorithm specified in RFC 5282. Create an instance by 14 // calling QuicDecrypter::Create(kAESG). 15 // 16 // It uses an authentication tag of 12 bytes (96 bits). The fixed prefix 17 // of the nonce is four bytes. 18 class NET_EXPORT_PRIVATE Aes128Gcm12Decrypter : public AeadBaseDecrypter { 19 public: 20 enum { 21 // Authentication tags are truncated to 96 bits. 22 kAuthTagSize = 12, 23 }; 24 25 Aes128Gcm12Decrypter(); 26 virtual ~Aes128Gcm12Decrypter(); 27 28 #if !defined(USE_OPENSSL) 29 protected: 30 // AeadBaseDecrypter methods: 31 virtual void FillAeadParams(base::StringPiece nonce, 32 base::StringPiece associated_data, 33 size_t auth_tag_size, 34 AeadParams* aead_params) const OVERRIDE; 35 #endif 36 37 private: 38 DISALLOW_COPY_AND_ASSIGN(Aes128Gcm12Decrypter); 39 }; 40 41 } // namespace net 42 43 #endif // NET_QUIC_CRYPTO_AES_128_GCM_12_DECRYPTER_H_ 44