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// 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 "chromeos/cryptohome/cryptohome_library.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "chromeos/dbus/cryptohome_client.h"
#include "chromeos/dbus/dbus_thread_manager.h"
namespace chromeos {
namespace {
CryptohomeLibrary* g_cryptohome_library = NULL;
} // namespace
CryptohomeLibrary::CryptohomeLibrary() {
}
CryptohomeLibrary::~CryptohomeLibrary() {
}
void CryptohomeLibrary::GetSystemSalt(
const GetSystemSaltCallback& callback) {
// TODO(hashimoto): Stop using GetSystemSaltSynt(). crbug.com/141009
base::MessageLoopProxy::current()->PostTask(
FROM_HERE, base::Bind(callback, GetSystemSaltSync()));
}
std::string CryptohomeLibrary::GetSystemSaltSync() {
LoadSystemSalt(); // no-op if it's already loaded.
return system_salt_;
}
std::string CryptohomeLibrary::GetCachedSystemSalt() {
return system_salt_;
}
void CryptohomeLibrary::LoadSystemSalt() {
if (!system_salt_.empty())
return;
std::vector<uint8> salt;
DBusThreadManager::Get()->GetCryptohomeClient()->GetSystemSalt(&salt);
if (salt.empty() || salt.size() % 2 != 0U) {
LOG(WARNING) << "System salt not available";
return;
}
system_salt_ = ConvertRawSaltToHexString(salt);
}
// static
void CryptohomeLibrary::Initialize() {
CHECK(!g_cryptohome_library);
g_cryptohome_library = new CryptohomeLibrary();
}
// static
bool CryptohomeLibrary::IsInitialized() {
return g_cryptohome_library;
}
// static
void CryptohomeLibrary::Shutdown() {
CHECK(g_cryptohome_library);
delete g_cryptohome_library;
g_cryptohome_library = NULL;
}
// static
CryptohomeLibrary* CryptohomeLibrary::Get() {
CHECK(g_cryptohome_library)
<< "CryptohomeLibrary::Get() called before Initialize()";
return g_cryptohome_library;
}
// static
std::string CryptohomeLibrary::ConvertRawSaltToHexString(
const std::vector<uint8>& salt) {
return StringToLowerASCII(base::HexEncode(
reinterpret_cast<const void*>(salt.data()), salt.size()));
}
} // namespace chromeos
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