| // 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 QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ |
| #define QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ |
| |
| #include <cstdint> |
| |
| #include "quic/core/crypto/chacha_base_decrypter.h" |
| #include "quic/platform/api/quic_export.h" |
| |
| namespace quic { |
| |
| // A ChaCha20Poly1305Decrypter is a QuicDecrypter 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 QuicDecrypter::Create(kCC20). |
| // |
| // It uses an authentication tag of 12 bytes (96 bits). The fixed prefix of the |
| // nonce is four bytes. |
| class QUIC_EXPORT_PRIVATE ChaCha20Poly1305Decrypter |
| : public ChaChaBaseDecrypter { |
| public: |
| enum { |
| kAuthTagSize = 12, |
| }; |
| |
| ChaCha20Poly1305Decrypter(); |
| ChaCha20Poly1305Decrypter(const ChaCha20Poly1305Decrypter&) = delete; |
| ChaCha20Poly1305Decrypter& operator=(const ChaCha20Poly1305Decrypter&) = |
| delete; |
| ~ChaCha20Poly1305Decrypter() override; |
| |
| uint32_t cipher_id() const override; |
| QuicPacketCount GetIntegrityLimit() const override; |
| }; |
| |
| } // namespace quic |
| |
| #endif // QUICHE_QUIC_CORE_CRYPTO_CHACHA20_POLY1305_DECRYPTER_H_ |