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// 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.
#ifndef CHROMEOS_TPM_PASSWORD_FETCHER_H_
#define CHROMEOS_TPM_PASSWORD_FETCHER_H_
#include <string>
#include "base/basictypes.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/dbus_method_call_status.h"
namespace chromeos {
// Interface which TpmPasswordFetcher uses to notify that password has been
// fetched.
class CHROMEOS_EXPORT TpmPasswordFetcherDelegate {
public:
virtual ~TpmPasswordFetcherDelegate() {}
virtual void OnPasswordFetched(const std::string& tpm_password) = 0;
};
// Class for fetching TPM password from the Cryptohome.
class CHROMEOS_EXPORT TpmPasswordFetcher {
public:
// Creates fetcher with the given delegate to be notified every time fetching
// is done.
explicit TpmPasswordFetcher(TpmPasswordFetcherDelegate* delegate);
~TpmPasswordFetcher();
// Fetches TPM password and stores the result. Also notifies |delegate_| with
// OnPasswordFetched() call.
void Fetch();
private:
// Used to implement Fetch().
void OnTpmIsReady(DBusMethodCallStatus call_status, bool tpm_is_ready);
// Used to implement Fetch().
void OnTpmGetPassword(DBusMethodCallStatus call_status,
const std::string& password);
// Posts a task to call Fetch() later.
void RescheduleFetch();
TpmPasswordFetcherDelegate* delegate_;
base::WeakPtrFactory<TpmPasswordFetcher> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(TpmPasswordFetcher);
};
} // namespace chromeos
#endif // CHROMEOS_TPM_PASSWORD_FETCHER_H_
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