48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
//
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// Copyright (C) 2020 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <tss2/tss2_esys.h>
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namespace cuttlefish {
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/**
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* Authorization wrapper for TPM2 calls.
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*
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* Most methods in tss2_esys.h take 3 ESYS_TR values for sessions and
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* authorization, with constraints that unused authorizations are all
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* ESYS_TR_NONE and are all at the end.
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*
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* This class is a convenience for specifying between 1 and 3
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* authorizations concisely and enforcing that the constraints are met.
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*/
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class TpmAuth {
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public:
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TpmAuth(ESYS_TR auth1);
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TpmAuth(ESYS_TR auth1, ESYS_TR auth2);
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TpmAuth(ESYS_TR auth1, ESYS_TR auth2, ESYS_TR auth3);
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ESYS_TR auth1() const;
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ESYS_TR auth2() const;
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ESYS_TR auth3() const;
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private:
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ESYS_TR auth1_;
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ESYS_TR auth2_;
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ESYS_TR auth3_;
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};
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} // namespace cuttlefish
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