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_ENCRYPTER_H_
6#define NET_QUIC_CRYPTO_AES_128_GCM_12_ENCRYPTER_H_
7
8#include "net/quic/crypto/aead_base_encrypter.h"
9
10namespace net {
11
12// An Aes128Gcm12Encrypter is a QuicEncrypter that implements the
13// AEAD_AES_128_GCM_12 algorithm specified in RFC 5282. Create an instance by
14// calling QuicEncrypter::Create(kAESG).
15//
16// It uses an authentication tag of 12 bytes (96 bits). The fixed prefix
17// of the nonce is four bytes.
18class NET_EXPORT_PRIVATE Aes128Gcm12Encrypter : public AeadBaseEncrypter {
19 public:
20  enum {
21    // Authentication tags are truncated to 96 bits.
22    kAuthTagSize = 12,
23  };
24
25  Aes128Gcm12Encrypter();
26  virtual ~Aes128Gcm12Encrypter();
27
28#if !defined(USE_OPENSSL)
29 protected:
30  // AeadBaseEncrypter 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(Aes128Gcm12Encrypter);
39};
40
41}  // namespace net
42
43#endif  // NET_QUIC_CRYPTO_AES_128_GCM_12_ENCRYPTER_H_
44