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/** @file
* IPRT Trusted Platform Module API abstracting host specific APIs.
*/
/*
* Copyright (C) 2021-2025 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_tpm_h
#define IPRT_INCLUDED_tpm_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/types.h>
#include <iprt/formats/tpm.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_rt_tpm IPRT Trusted Platform Module API
* @ingroup grp_rt
*
* This API provides a uniform way to access a Trusted Platform Module across all
* supported hosts.
*
* @{
*/
/**
* TPM version.
*/
typedef enum RTTPMVERSION
{
/** The usual invalid option. */
RTTPMVERSION_INVALID = 0,
/** TPM conforms to version 1.2 of the TCG specification. */
RTTPMVERSION_1_2,
/** TPM conforms to version 2.0 of the TCG specification. */
RTTPMVERSION_2_0,
/** TPM version couldn't be acquired. */
RTTPMVERSION_UNKNOWN,
/** Usual 32bit hack. */
RTTPMVERSION_32BIT_HACK = 0x7fffffff
} RTTPMVERSION;
/** Pointer to a TPM version. */
typedef RTTPMVERSION *PRTTPMVERSION;
/** TPM handle. */
typedef struct RTTPMINT *RTTPM;
/** Pointer to a TPM handle. */
typedef RTTPM *PRTTPM;
/** NIL TPM handle value. */
#define NIL_RTTPM ((RTTPM)0)
/** Default TPM of the host. */
#define RTTPM_ID_DEFAULT UINT32_C(0xffffffff)
/**
* Tries to open the given TPM returning a handle.
*
* @returns IPRT status code.
* @param phTpm Where to store the handle to the TPM module on success.
* @param idTpm The TPM to open, use RTTPM_ID_DEFAULT for the default TPM of the system.
*/
RTDECL(int) RTTpmOpen(PRTTPM phTpm, uint32_t idTpm);
/**
* Closes the given TPM handle freeing all allocated resources.
*
* @returns IPRT status code.
* @param hTpm Handle of the TPM to close.
*/
RTDECL(int) RTTpmClose(RTTPM hTpm);
/**
* Returns the version of the TPM for the given handle.
*
* @returns Version implemented by the TPM.
* @param hTpm Handle of the TPM.
*/
RTDECL(RTTPMVERSION) RTTpmGetVersion(RTTPM hTpm);
/**
* Returns the maximum locality supported by the given TPM.
*
* @returns Maximum locality supported (0-4).
* @param hTpm Handle of the TPM.
*/
RTDECL(uint32_t) RTTpmGetLocalityMax(RTTPM hTpm);
/**
* Cancels a currently executed request for the given TPM handle.
*
* @returns IPRT status code.
* @param hTpm Handle of the TPM.
*/
RTDECL(int) RTTpmReqCancel(RTTPM hTpm);
/**
* Executes the given request on the given TPM handle.
*
* @returns IPRT status code.
* @param hTpm Handle of the TPM.
* @param bLoc The locality to use (only 0 might be supported on some hosts).
* @param pvReq The request data.
* @param cbReq Size of the request in bytes.
* @param pvResp Where to store the response data.
* @param cbRespMax Size of the response buffer.
* @param pcbResp Where to store the actual size of the response, optional.
*/
RTDECL(int) RTTpmReqExec(RTTPM hTpm, uint8_t bLoc, const void *pvReq, size_t cbReq,
void *pvResp, size_t cbRespMax, size_t *pcbResp);
/** @} */
RT_C_DECLS_END
#endif /* !IPRT_INCLUDED_tpm_h */
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