blob: 7b6e0b4e205776f5fa5601c21981b05b823d4afa (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_QUIC_CRYPTO_CHACHA20_POLY1305_RFC7539_ENCRYPTER_H_
#define NET_QUIC_CRYPTO_CHACHA20_POLY1305_RFC7539_ENCRYPTER_H_
#include <stddef.h>
#include "base/macros.h"
#include "net/quic/crypto/aead_base_encrypter.h"
namespace net {
// A ChaCha20Poly1305Encrypter is a QuicEncrypter that implements the
// AEAD_CHACHA20_POLY1305 algorithm specified in RFC 7539, except that
// it truncates the Poly1305 authenticator to 12 bytes. Create an instance
// by calling QuicEncrypter::Create(kCC12).
//
// It uses an authentication tag of 16 bytes (128 bits). There is no
// fixed nonce prefix.
class NET_EXPORT_PRIVATE ChaCha20Poly1305Rfc7539Encrypter
: public AeadBaseEncrypter {
public:
enum {
kAuthTagSize = 12,
};
ChaCha20Poly1305Rfc7539Encrypter();
~ChaCha20Poly1305Rfc7539Encrypter() override;
// Returns true if the underlying crypto library supports the RFC 7539
// variant of ChaCha20+Poly1305.
static bool IsSupported();
#if !defined(USE_OPENSSL)
protected:
// AeadBaseEncrypter methods:
void FillAeadParams(base::StringPiece nonce,
base::StringPiece associated_data,
size_t auth_tag_size,
AeadParams* aead_params) const override;
#endif
private:
DISALLOW_COPY_AND_ASSIGN(ChaCha20Poly1305Rfc7539Encrypter);
};
} // namespace net
#endif // NET_QUIC_CRYPTO_CHACHA20_POLY1305_RFC7539_ENCRYPTER_H_
|
