Cast: Reshuffle files under media/cast

media/cast/transport/utility/transport_encryption_handler.cc

-// 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.
-
-#include "media/cast/transport/utility/transport_encryption_handler.h"
-
-#include "base/logging.h"
-#include "crypto/encryptor.h"
-#include "crypto/symmetric_key.h"
-#include "media/cast/transport/cast_transport_defines.h"
-
-namespace media {
-namespace cast {
-namespace transport {
-
-TransportEncryptionHandler::TransportEncryptionHandler()
-    : key_(), encryptor_(), iv_mask_(), is_activated_(false) {}
-
-TransportEncryptionHandler::~TransportEncryptionHandler() {}
-
-bool TransportEncryptionHandler::Initialize(std::string aes_key,
-                                            std::string aes_iv_mask) {
-  is_activated_ = false;
-  if (aes_iv_mask.size() == kAesKeySize && aes_key.size() == kAesKeySize) {
-    iv_mask_ = aes_iv_mask;
-    key_.reset(
-        crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, aes_key));
-    encryptor_.reset(new crypto::Encryptor());
-    encryptor_->Init(key_.get(), crypto::Encryptor::CTR, std::string());
-    is_activated_ = true;
-  } else if (aes_iv_mask.size() != 0 || aes_key.size() != 0) {
-    DCHECK_EQ(aes_iv_mask.size(), 0u)
-        << "Invalid Crypto configuration: aes_iv_mask.size";
-    DCHECK_EQ(aes_key.size(), 0u)
-        << "Invalid Crypto configuration: aes_key.size";
-    return false;
-  }
-  return true;
-}
-
-bool TransportEncryptionHandler::Encrypt(uint32 frame_id,
-                                         const base::StringPiece& data,
-                                         std::string* encrypted_data) {
-  if (!is_activated_)
-    return false;
-  if (!encryptor_->SetCounter(GetAesNonce(frame_id, iv_mask_))) {
-    NOTREACHED() << "Failed to set counter";
-    return false;
-  }
-  if (!encryptor_->Encrypt(data, encrypted_data)) {
-    NOTREACHED() << "Encrypt error";
-    return false;
-  }
-  return true;
-}
-
-bool TransportEncryptionHandler::Decrypt(uint32 frame_id,
-                                         const base::StringPiece& ciphertext,
-                                         std::string* plaintext) {
-  if (!is_activated_) {
-    return false;
-  }
-  if (!encryptor_->SetCounter(transport::GetAesNonce(frame_id, iv_mask_))) {
-    NOTREACHED() << "Failed to set counter";
-    return false;
-  }
-  if (!encryptor_->Decrypt(ciphertext, plaintext)) {
-    VLOG(1) << "Decryption error";
-    return false;
-  }
-  return true;
-}
-
-}  // namespace transport
-}  // namespace cast
-}  // namespace media