tpm_key_blob_maker.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 <optional>
//
#include <keymaster/soft_key_factory.h>
//
#include "cuttlefish/host/commands/secure_env/tpm_resource_manager.h"
 
namespace cuttlefish {
 
class TpmKeyBlobMaker : public keymaster::SoftwareKeyBlobMaker {
public:
  TpmKeyBlobMaker(TpmResourceManager& resource_manager);
 
  keymaster_error_t CreateKeyBlob(
      const keymaster::AuthorizationSet& key_description,
      keymaster_key_origin_t origin,
      const keymaster::KeymasterKeyBlob& key_material,
      keymaster::KeymasterKeyBlob* blob,
      keymaster::AuthorizationSet* hw_enforced,
      keymaster::AuthorizationSet* sw_enforced) const override;
 
  keymaster_error_t UnvalidatedCreateKeyBlob(
      const keymaster::KeymasterKeyBlob& key_material,
      const keymaster::AuthorizationSet& hw_enforced,
      const keymaster::AuthorizationSet& sw_enforced,
      const keymaster::AuthorizationSet& hidden,
      keymaster::KeymasterKeyBlob* blob) const;
 
  keymaster_error_t UnwrapKeyBlob(
      const keymaster_key_blob_t& blob,
      keymaster::AuthorizationSet* hw_enforced,
      keymaster::AuthorizationSet* sw_enforced,
      const keymaster::AuthorizationSet& hidden,
      keymaster::KeymasterKeyBlob* key_material) const;
 
  keymaster_error_t SetSystemVersion(uint32_t os_version, uint32_t os_patchlevel);
  keymaster_error_t SetVendorPatchlevel(uint32_t vendor_patchlevel);
  keymaster_error_t SetBootPatchlevel(uint32_t boot_patchlevel);
 
 private:
  TpmResourceManager& resource_manager_;
  uint32_t os_version_;
  uint32_t os_patchlevel_;
  std::optional<uint32_t> vendor_patchlevel_;
  std::optional<uint32_t> boot_patchlevel_;
};
 
}  // namespace cuttlefish