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_NVRAM_IMPL_H_ 18 #define TPM_MANAGER_SERVER_TPM2_NVRAM_IMPL_H_ 19 20 #include "tpm_manager/server/tpm_nvram.h" 21 22 #include <memory> 23 #include <string> 24 25 #include <base/macros.h> 26 #include <base/memory/scoped_ptr.h> 27 #include <trunks/trunks_factory.h> 28 29 #include "tpm_manager/server/local_data_store.h" 30 31 namespace tpm_manager { 32 33 class Tpm2NvramImpl : public TpmNvram { 34 public: 35 // Does not take ownership of |local_data_store|. 36 explicit Tpm2NvramImpl(LocalDataStore* local_data_store); 37 // Does not take ownership of |local_data_store|, but takes ownership of 38 // |factory|. 39 Tpm2NvramImpl(std::unique_ptr<trunks::TrunksFactory> factory, 40 LocalDataStore* local_data_store); 41 ~Tpm2NvramImpl() override = default; 42 43 // TpmNvram methods. 44 bool DefineNvram(uint32_t index, size_t length) override; 45 bool DestroyNvram(uint32_t index) override; 46 bool WriteNvram(uint32_t index, const std::string& data) override; 47 bool ReadNvram(uint32_t index, std::string* data) override; 48 bool IsNvramDefined(uint32_t index, bool* defined) override; 49 bool IsNvramLocked(uint32_t index, bool* locked) override; 50 bool GetNvramSize(uint32_t index, size_t* size) override; 51 52 private: 53 // Initializes the connection to the Tpm2.0 and starts an authorization 54 // session. 55 // Note: there are no guarantees about the authorization value loaded into 56 // |trunks_session_| at the end of this method. 57 bool Initialize(); 58 59 // This method initializes and ensures that a valid owner password is 60 // available. When this method returns, |owner_password_| will be loaded 61 // into |trunks_session_|. 62 bool InitializeWithOwnerPassword(); 63 64 std::unique_ptr<trunks::TrunksFactory> trunks_factory_; 65 LocalDataStore* local_data_store_; 66 bool initialized_; 67 std::string owner_password_; 68 scoped_ptr<trunks::HmacSession> trunks_session_; 69 scoped_ptr<trunks::TpmUtility> trunks_utility_; 70 71 friend class Tpm2NvramTest; 72 DISALLOW_COPY_AND_ASSIGN(Tpm2NvramImpl); 73 }; 74 75 } // namespace tpm_manager 76 77 #endif // TPM_MANAGER_SERVER_TPM2_NVRAM_IMPL_H_ 78
