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/* Copyright 2018 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.
*/
/* Compatibility layer between the TPM code and PinWeaver.
*
* This is needed because the headers for the TPM are not compatible with the
* headers used by pinweaver.c. It also makes it easier to mock the
* functionality derived from the TPM code.
*/
#ifndef __CROS_EC_INCLUDE_PINWEAVER_TPM_IMPORTS_H
#define __CROS_EC_INCLUDE_PINWEAVER_TPM_IMPORTS_H
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/* This is used to get the storage seed from the TPM implementation so
* TPM_Clear() will break the keys used by PinWeaver so that any metadata
* that persists on the machine storage is unusable by attackers.
*/
void get_storage_seed(void *buf, size_t *len);
/* Reads PCR values for indexes from bitmask and computes sha256 digest of
* concatenated values. Populates the digest in |sha256_of_selected_pcr|.
*/
uint8_t get_current_pcr_digest(const uint8_t bitmask[2],
uint8_t sha256_of_selected_pcr[32]);
#ifdef __cplusplus
}
#endif
#endif /* __CROS_EC_INCLUDE_PINWEAVER_TPM_IMPORTS_H */
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