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 #include "tpm_manager/server/tpm2_status_impl.h" 18 19 #include <base/logging.h> 20 #include <trunks/error_codes.h> 21 #include <trunks/tpm_generated.h> 22 #include <trunks/trunks_factory_impl.h> 23 24 using trunks::TPM_RC; 25 using trunks::TPM_RC_SUCCESS; 26 27 namespace tpm_manager { 28 29 Tpm2StatusImpl::Tpm2StatusImpl(const trunks::TrunksFactory& factory) 30 : trunks_factory_(factory), 31 trunks_tpm_state_(trunks_factory_.GetTpmState()) {} 32 33 bool Tpm2StatusImpl::IsTpmEnabled() { 34 if (!initialized_) { 35 Refresh(); 36 } 37 return trunks_tpm_state_->IsEnabled(); 38 } 39 40 bool Tpm2StatusImpl::IsTpmOwned() { 41 if (!is_owned_) { 42 Refresh(); 43 } 44 is_owned_ = trunks_tpm_state_->IsOwned(); 45 return is_owned_; 46 } 47 48 bool Tpm2StatusImpl::GetDictionaryAttackInfo(int* counter, 49 int* threshold, 50 bool* lockout, 51 int* seconds_remaining) { 52 if (!Refresh()) { 53 return false; 54 } 55 if (counter) { 56 *counter = trunks_tpm_state_->GetLockoutCounter(); 57 } 58 if (threshold) { 59 *threshold = trunks_tpm_state_->GetLockoutThreshold(); 60 } 61 if (lockout) { 62 *lockout = trunks_tpm_state_->IsInLockout(); 63 } 64 if (seconds_remaining) { 65 *seconds_remaining = trunks_tpm_state_->GetLockoutCounter() * 66 trunks_tpm_state_->GetLockoutInterval(); 67 } 68 return true; 69 } 70 71 bool Tpm2StatusImpl::Refresh() { 72 TPM_RC result = trunks_tpm_state_->Initialize(); 73 if (result != TPM_RC_SUCCESS) { 74 LOG(WARNING) << "Error initializing trunks tpm state: " 75 << trunks::GetErrorString(result); 76 return false; 77 } 78 initialized_ = true; 79 return true; 80 } 81 82 } // namespace tpm_manager 83
