blob: 6d8e121d306567d61e6fe8a5efe275fce8b17f6b [file] [log] [blame]
// Copyright 2020 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <base/macros.h>
#include "trunks/tpm_generated.h"
#include "trunks/trunks_export.h"
namespace trunks {
// TpmCache is an interface which provides access to TPM cache information.
class TRUNKS_EXPORT TpmCache {
TpmCache() = default;
TpmCache(const TpmCache&) = delete;
TpmCache& operator=(const TpmCache&) = delete;
virtual ~TpmCache() = default;
// Stores the cached salting key public area in |public_area|. If the cache
// doesn't exist, gets the public area from TPM and caches it. |public_area|
// is untouched if there's an error.
virtual TPM_RC GetSaltingKeyPublicArea(TPMT_PUBLIC* public_area) = 0;
// Returns the best supported key type for SRK and salting key, and it can
// only be TPM_ALG_ECC or TPM_ALG_RSA. ECC is preferred to RSA. If the cache
// doesn't exist, gets the info from TPM and caches it. In case neither ECC
// nor RSA is supported, or there is an error, returns TPM_ALG_ERROR.
virtual TPM_ALG_ID GetBestSupportedKeyType() = 0;
} // namespace trunks