blob: a77d85c1e601a9256b2ac186ede05cbc9cba579c [file] [log] [blame]
// 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 <stdint.h>
#include <string>
#include <vector>
#include "base/callback_forward.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/dbus_method_call_status.h"
namespace chromeos {
// This class is used to get the system salt from cryptohome and cache it.
class CHROMEOS_EXPORT SystemSaltGetter {
typedef base::Callback<void(const std::string& system_salt)>
using RawSalt = std::vector<uint8_t>;
// Manage an explicitly initialized global instance.
static void Initialize();
static bool IsInitialized();
static void Shutdown();
static SystemSaltGetter* Get();
// Converts |salt| to a hex encoded string.
static std::string ConvertRawSaltToHexString(const RawSalt& salt);
// Returns system hash in hex encoded ascii format. Note: this may return
// an empty string (e.g. errors in D-Bus layer)
void GetSystemSalt(const GetSystemSaltCallback& callback);
// Adds another callback to be called when system salt is received.
// (If system salt is available, closure will be called immediately).
void AddOnSystemSaltReady(const base::Closure& closure);
// Returns pointer to binary system salt if it is already known.
// Returns nullptr if system salt is not known.
const RawSalt* GetRawSalt() const;
// This is for browser tests API.
void SetRawSaltForTesting(const RawSalt& raw_salt);
// Used to implement GetSystemSalt().
void DidWaitForServiceToBeAvailable(const GetSystemSaltCallback& callback,
bool service_is_available);
void DidGetSystemSalt(const GetSystemSaltCallback& callback,
DBusMethodCallStatus call_status,
const RawSalt& system_salt);
RawSalt raw_salt_;
std::string system_salt_;
// List of callbacks waiting for system salt ready event.
std::vector<base::Closure> on_system_salt_ready_;
base::WeakPtrFactory<SystemSaltGetter> weak_ptr_factory_;
} // namespace chromeos