| // 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_ENCRYPTER_H_ |
| #define NET_QUIC_CRYPTO_CHACHA20_POLY1305_ENCRYPTER_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 |
| // draft-agl-tls-chacha20poly1305-04, 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 ChaCha20Poly1305Encrypter : public AeadBaseEncrypter { |
| public: |
| enum { |
| kAuthTagSize = 12, |
| }; |
| |
| ChaCha20Poly1305Encrypter(); |
| virtual ~ChaCha20Poly1305Encrypter(); |
| |
| // Returns true if the underlying crypto library supports ChaCha20+Poly1305. |
| static bool IsSupported(); |
| |
| #if !defined(USE_OPENSSL) |
| protected: |
| // AeadBaseEncrypter methods: |
| virtual 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(ChaCha20Poly1305Encrypter); |
| }; |
| |
| } // namespace net |
| |
| #endif // NET_QUIC_CRYPTO_CHACHA20_POLY1305_ENCRYPTER_H_ |