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

net/quic/crypto/quic_encrypter.h

-// Copyright (c) 2012 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_QUIC_ENCRYPTER_H_
-#define NET_QUIC_CRYPTO_QUIC_ENCRYPTER_H_
-
-#include <stddef.h>
-
-#include "net/base/net_export.h"
-#include "net/quic/quic_protocol.h"
-
-namespace net {
-
-class NET_EXPORT_PRIVATE QuicEncrypter {
- public:
-  virtual ~QuicEncrypter() {}
-
-  static QuicEncrypter* Create(QuicTag algorithm);
-
-  // Sets the encryption key. Returns true on success, false on failure.
-  //
-  // NOTE: The key is the client_write_key or server_write_key derived from
-  // the master secret.
-  virtual bool SetKey(base::StringPiece key) = 0;
-
-  // Sets the fixed initial bytes of the nonce. Returns true on success,
-  // false on failure.
-  //
-  // NOTE: The nonce prefix is the client_write_iv or server_write_iv
-  // derived from the master secret. A 64-bit packet number will
-  // be appended to form the nonce.
-  //
-  //                          <------------ 64 bits ----------->
-  //   +---------------------+----------------------------------+
-  //   |    Fixed prefix     |      packet number      |
-  //   +---------------------+----------------------------------+
-  //                          Nonce format
-  //
-  // The security of the nonce format requires that QUIC never reuse a
-  // packet number, even when retransmitting a lost packet.
-  virtual bool SetNoncePrefix(base::StringPiece nonce_prefix) = 0;
-
-  // Writes encrypted |plaintext| and a MAC over |plaintext| and
-  // |associated_data| into output. Sets |output_length| to the number of
-  // bytes written. Returns true on success or false if there was an error.
-  // |packet_number| is appended to the |nonce_prefix| value provided in
-  // SetNoncePrefix() to form the nonce. |output| must not overlap with
-  // |associated_data|. If |output| overlaps with |plaintext| then
-  // |plaintext| must be <= |output|.
-  virtual bool EncryptPacket(QuicPathId path_id,
-                             QuicPacketNumber packet_number,
-                             base::StringPiece associated_data,
-                             base::StringPiece plaintext,
-                             char* output,
-                             size_t* output_length,
-                             size_t max_output_length) = 0;
-
-  // GetKeySize() and GetNoncePrefixSize() tell the HKDF class how many bytes
-  // of key material needs to be derived from the master secret.
-  // NOTE: the sizes returned by GetKeySize() and GetNoncePrefixSize() are
-  // also correct for the QuicDecrypter of the same algorithm. So only
-  // QuicEncrypter has these two methods.
-
-  // Returns the size in bytes of a key for the algorithm.
-  virtual size_t GetKeySize() const = 0;
-  // Returns the size in bytes of the fixed initial part of the nonce.
-  virtual size_t GetNoncePrefixSize() const = 0;
-
-  // Returns the maximum length of plaintext that can be encrypted
-  // to ciphertext no larger than |ciphertext_size|.
-  virtual size_t GetMaxPlaintextSize(size_t ciphertext_size) const = 0;
-
-  // Returns the length of the ciphertext that would be generated by encrypting
-  // to plaintext of size |plaintext_size|.
-  virtual size_t GetCiphertextSize(size_t plaintext_size) const = 0;
-
-  // For use by unit tests only.
-  virtual base::StringPiece GetKey() const = 0;
-  virtual base::StringPiece GetNoncePrefix() const = 0;
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_CRYPTO_QUIC_ENCRYPTER_H_