1 // 2 // Copyright (C) 2020 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 #pragma once 17 18 #include <tss2/tss2_esys.h> 19 20 /** 21 * Authorization wrapper for TPM2 calls. 22 * 23 * Most methods in tss2_esys.h take 3 ESYS_TR values for sessions and 24 * authorization, with constraints that unused authorizations are all 25 * ESYS_TR_NONE and are all at the end. 26 * 27 * This class is a convenience for specifying between 1 and 3 28 * authorizations concisely and enforcing that the constraints are met. 29 */ 30 class TpmAuth { 31 public: 32 TpmAuth(ESYS_TR auth1); 33 TpmAuth(ESYS_TR auth1, ESYS_TR auth2); 34 TpmAuth(ESYS_TR auth1, ESYS_TR auth2, ESYS_TR auth3); 35 36 ESYS_TR auth1() const; 37 ESYS_TR auth2() const; 38 ESYS_TR auth3() const; 39 private: 40 ESYS_TR auth1_; 41 ESYS_TR auth2_; 42 ESYS_TR auth3_; 43 }; 44