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 31 namespace tpm_manager { 32 33 class 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