1//
2// Copyright (C) 2015 The Android Open Source Project
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8//      http://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15//
16
17#ifndef TPM_MANAGER_SERVER_TPM2_STATUS_IMPL_H_
18#define TPM_MANAGER_SERVER_TPM2_STATUS_IMPL_H_
19
20#include "tpm_manager/server/tpm_status.h"
21
22#include <memory>
23
24#include <base/macros.h>
25#include <trunks/tpm_state.h>
26#include <trunks/trunks_factory.h>
27
28namespace tpm_manager {
29
30class Tpm2StatusImpl : public TpmStatus {
31 public:
32  // Does not take ownership of |factory|.
33  explicit Tpm2StatusImpl(const trunks::TrunksFactory& factory);
34  ~Tpm2StatusImpl() override = default;
35
36  // TpmState methods.
37  bool IsTpmEnabled() override;
38  bool IsTpmOwned() override;
39  bool GetDictionaryAttackInfo(int* counter,
40                               int* threshold,
41                               bool* lockout,
42                               int* seconds_remaining) override;
43
44 private:
45  // Refreshes the Tpm state information. Can be called as many times as needed
46  // to refresh the cached information in this class. Return true if the
47  // refresh operation succeeded.
48  bool Refresh();
49
50  bool initialized_{false};
51  bool is_owned_{false};
52  const trunks::TrunksFactory& trunks_factory_;
53  std::unique_ptr<trunks::TpmState> trunks_tpm_state_;
54
55  DISALLOW_COPY_AND_ASSIGN(Tpm2StatusImpl);
56};
57
58}  // namespace tpm_manager
59
60#endif  // TPM_MANAGER_SERVER_TPM2_STATUS_IMPL_H_
61