| // 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. |
| |
| #ifndef TRUNKS_TPM_CACHE_H_ |
| #define TRUNKS_TPM_CACHE_H_ |
| |
| #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 { |
| public: |
| 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 |
| |
| #endif // TRUNKS_TPM_CACHE_H_ |