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

net/quic/crypto/quic_decrypter.cc

-// 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.
-
-#include "net/quic/crypto/quic_decrypter.h"
-
-#include "crypto/hkdf.h"
-#include "net/quic/crypto/aes_128_gcm_12_decrypter.h"
-#include "net/quic/crypto/chacha20_poly1305_decrypter.h"
-#include "net/quic/crypto/crypto_protocol.h"
-#include "net/quic/crypto/null_decrypter.h"
-
-using base::StringPiece;
-using std::string;
-
-namespace net {
-
-// static
-QuicDecrypter* QuicDecrypter::Create(QuicTag algorithm) {
-  switch (algorithm) {
-    case kAESG:
-      return new Aes128Gcm12Decrypter();
-    case kCC20:
-      return new ChaCha20Poly1305Decrypter();
-    case kNULL:
-      return new NullDecrypter();
-    default:
-      LOG(FATAL) << "Unsupported algorithm: " << algorithm;
-      return nullptr;
-  }
-}
-
-// static
-void QuicDecrypter::DiversifyPreliminaryKey(StringPiece preliminary_key,
-                                            StringPiece nonce_prefix,
-                                            DiversificationNonce nonce,
-                                            size_t key_size,
-                                            size_t nonce_prefix_size,
-                                            string* out_key,
-                                            string* out_nonce_prefix) {
-  crypto::HKDF hkdf(preliminary_key.as_string() + nonce_prefix.as_string(),
-                    StringPiece(nonce, kDiversificationNonceSize),
-                    "QUIC key diversification", 0, key_size, 0,
-                    nonce_prefix_size, 0);
-  *out_key = hkdf.server_write_key().as_string();
-  *out_nonce_prefix = hkdf.server_write_iv().as_string();
-}
-
-}  // namespace net