| // Copyright 2017 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 QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_TLS_ENCRYPTER_H_ |
| #define QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_TLS_ENCRYPTER_H_ |
| |
| #include "quic/core/crypto/chacha_base_encrypter.h" |
| #include "quic/platform/api/quic_export.h" |
| |
| namespace quic { |
| |
| // A ChaCha20Poly1305Encrypter is a QuicEncrypter that implements the |
| // AEAD_CHACHA20_POLY1305 algorithm specified in RFC 7539 for use in IETF QUIC. |
| // |
| // It uses an authentication tag of 16 bytes (128 bits). It uses a 12 byte IV |
| // that is XOR'd with the packet number to compute the nonce. |
| class QUIC_EXPORT_PRIVATE ChaCha20Poly1305TlsEncrypter |
| : public ChaChaBaseEncrypter { |
| public: |
| enum { |
| kAuthTagSize = 16, |
| }; |
| |
| ChaCha20Poly1305TlsEncrypter(); |
| ChaCha20Poly1305TlsEncrypter(const ChaCha20Poly1305TlsEncrypter&) = delete; |
| ChaCha20Poly1305TlsEncrypter& operator=(const ChaCha20Poly1305TlsEncrypter&) = |
| delete; |
| ~ChaCha20Poly1305TlsEncrypter() override; |
| |
| QuicPacketCount GetConfidentialityLimit() const override; |
| }; |
| |
| } // namespace quic |
| |
| #endif // QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_TLS_ENCRYPTER_H_ |