tpm_hmac.h

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//
// Copyright (C) 2020 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#pragma once
 
#include <memory>
#include <string>
 
#include <tss2/tss2_esys.h>
 
#include "cuttlefish/host/commands/secure_env/tpm_auth.h"
 
namespace cuttlefish {
 
class TpmResourceManager;
 
struct EsysDeleter {
  void operator()(void* data) { Esys_Free(data); }
};
 
template<typename T>
using UniqueEsysPtr = std::unique_ptr<T, EsysDeleter>;
 
UniqueEsysPtr<TPM2B_DIGEST> TpmHmac(
    TpmResourceManager& resource_manager,
    ESYS_TR key_handle,
    TpmAuth auth,
    const uint8_t* data,
    size_t data_size);
 
UniqueEsysPtr<TPM2B_DIGEST> TpmHmacWithContext(
    TpmResourceManager& resource_manager, const std::string& context,
    const uint8_t* data, size_t data_size);
 
}  // namespace cuttlefish