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_CONNECTION_H_ 18#define TPM_MANAGER_SERVER_TPM_CONNECTION_H_ 19 20#include <string> 21 22#include <base/macros.h> 23#include <trousers/scoped_tss_type.h> 24 25namespace tpm_manager { 26 27class TpmConnection { 28 public: 29 TpmConnection() = default; 30 ~TpmConnection() = default; 31 32 // This method returns a handle to the current Tpm context. 33 // Note: this method still retains ownership of the context. If this class 34 // is deleted, the context handle will be invalidated. Returns 0 on failure. 35 TSS_HCONTEXT GetContext(); 36 37 // This method tries to get a handle to the TPM. Returns 0 on failure. 38 TSS_HTPM GetTpm(); 39 40 // This method tries to get a handle to the TPM and with the given owner 41 // password. Returns 0 on failure. 42 TSS_HTPM GetTpmWithAuth(const std::string& owner_password); 43 44 private: 45 // This method connects to the Tpm. Returns true on success. 46 bool ConnectContextIfNeeded(); 47 48 trousers::ScopedTssContext context_; 49 50 DISALLOW_COPY_AND_ASSIGN(TpmConnection); 51}; 52 53} // namespace tpm_manager 54 55#endif // TPM_MANAGER_SERVER_TPM_CONNECTION_H_ 56