Move shared files in net/quic/ into net/quic/core/

net/quic/crypto/crypto_secret_boxer.h

-// Copyright (c) 2013 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_CRYPTO_SECRET_BOXER_H_
-#define NET_QUIC_CRYPTO_CRYPTO_SECRET_BOXER_H_
-
-#include <stddef.h>
-
-#include <string>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/strings/string_piece.h"
-#include "base/synchronization/lock.h"
-#include "net/base/net_export.h"
-
-namespace net {
-
-class QuicRandom;
-
-// CryptoSecretBoxer encrypts small chunks of plaintext (called 'boxing') and
-// then, later, can authenticate+decrypt the resulting boxes. This object is
-// thread-safe.
-class NET_EXPORT_PRIVATE CryptoSecretBoxer {
- public:
-  CryptoSecretBoxer();
-  ~CryptoSecretBoxer();
-
-  // GetKeySize returns the number of bytes in a key.
-  static size_t GetKeySize();
-
-  // SetKeys sets a std::list of encryption keys. The first key in the std::list
-  // will be used by |Box|, but all supplied keys will be tried by |Unbox|, to
-  // handle key skew across the fleet. This must be called before |Box| or
-  // |Unbox|. Keys must be |GetKeySize()| bytes long.
-  void SetKeys(const std::vector<std::string>& keys);
-
-  // Box encrypts |plaintext| using a random nonce generated from |rand| and
-  // returns the resulting ciphertext. Since an authenticator and nonce are
-  // included, the result will be slightly larger than |plaintext|. The first
-  // key in the std::vector supplied to |SetKeys| will be used.
-  std::string Box(QuicRandom* rand, base::StringPiece plaintext) const;
-
-  // Unbox takes the result of a previous call to |Box| in |ciphertext| and
-  // authenticates+decrypts it. If |ciphertext| cannot be decrypted with any of
-  // the supplied keys, the function returns false. Otherwise, |out_storage| is
-  // used to store the result and |out| is set to point into |out_storage| and
-  // contains the original plaintext.
-  bool Unbox(base::StringPiece ciphertext,
-             std::string* out_storage,
-             base::StringPiece* out) const;
-
- private:
-  mutable base::Lock lock_;
-  //  GUARDED_BY(lock_).
-  std::vector<std::string> keys_;
-
-  DISALLOW_COPY_AND_ASSIGN(CryptoSecretBoxer);
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_CRYPTO_CRYPTO_SECRET_BOXER_H_