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// 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_
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