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_TPM_STATUS_IMPL_H_
18#define TPM_MANAGER_SERVER_TPM_STATUS_IMPL_H_
19
20#include "tpm_manager/server/tpm_status.h"
21
22#include <memory>
23#include <string>
24
25#include <base/macros.h>
26#include <trousers/tss.h>
27#include <trousers/trousers.h>  // NOLINT(build/include_alpha)
28
29#include <tpm_manager/server/tpm_connection.h>
30
31namespace tpm_manager {
32
33class TpmStatusImpl : public TpmStatus {
34 public:
35  TpmStatusImpl() = default;
36  ~TpmStatusImpl() override = default;
37
38  // TpmState methods.
39  bool IsTpmEnabled() override;
40  bool IsTpmOwned() override;
41  bool GetDictionaryAttackInfo(int* counter,
42                               int* threshold,
43                               bool* lockout,
44                               int* seconds_remaining) override;
45
46 private:
47  // This method refreshes the |is_owned_| and |is_enabled_| status of the
48  // Tpm. It can be called multiple times.
49  void RefreshOwnedEnabledInfo();
50  // This method wraps calls to Tspi_TPM_GetCapability. |data| is set to
51  // the raw capability data. If the optional out argument |tpm_result| is
52  // provided, it is set to the result of the |Tspi_TPM_GetCapability| call.
53  bool GetCapability(uint32_t capability,
54                     uint32_t sub_capability,
55                     std::string* data,
56                     TSS_RESULT* tpm_result);
57
58  TpmConnection tpm_connection_;
59  bool is_enabled_{false};
60  bool is_owned_{false};
61  bool is_enable_initialized_{false};
62
63  DISALLOW_COPY_AND_ASSIGN(TpmStatusImpl);
64};
65
66}  // namespace tpm_manager
67
68#endif  // TPM_MANAGER_SERVER_TPM_STATUS_IMPL_H_
69