Landing Recent QUIC changes until 4/22/2016 14:55 UTC

net/quic/crypto/chacha20_poly1305_rfc7539_decrypter.h

-// 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_DECRYPTER_H_
-#define NET_QUIC_CRYPTO_CHACHA20_POLY1305_RFC7539_DECRYPTER_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "net/quic/crypto/aead_base_decrypter.h"
-
-namespace net {
-
-// A ChaCha20Poly1305Rfc7539Decrypter is a QuicDecrypter 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
-// QuicDecrypter::Create(kCC12).
-//
-// It uses an authentication tag of 16 bytes (128 bits). There is no
-// fixed nonce prefix.
-class NET_EXPORT_PRIVATE ChaCha20Poly1305Rfc7539Decrypter
-    : public AeadBaseDecrypter {
- public:
-  enum {
-    kAuthTagSize = 12,
-  };
-
-  ChaCha20Poly1305Rfc7539Decrypter();
-  ~ChaCha20Poly1305Rfc7539Decrypter() override;
-
-  // Returns true if the underlying crypto library supports the RFC 7539
-  // variant of ChaCha20+Poly1305.
-  static bool IsSupported();
-
-  const char* cipher_name() const override;
-  uint32_t cipher_id() const override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ChaCha20Poly1305Rfc7539Decrypter);
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_CRYPTO_CHACHA20_POLY1305_RFC7539_DECRYPTER_H_