TCG Software Stack Developer's Reference

NAME

Tspi_TPM_PcrRead - read the value in a PCR register

SYNOPSIS

#include <tss/platform.h>
#include <tss/tcpa_defines.h>
#include <tss/tcpa_typedef.h>
#include <tss/tcpa_struct.h>
#include <tss/tss_typedef.h>
#include <tss/tss_structs.h>
#include <tss/tspi.h>

TSS_RESULT Tspi_TPM_PcrRead(TSS_HTPM hTPM,              UINT32 ulPcrIndex,
                            UINT32*  pulPcrValueLength, BYTE** prgbPcrValue);

DESCRIPTION

Tspi_TPM_PcrRead reads a PCR register to find the current values.

PARAMETERS

hTPM

The hTPM parameter is used to specify the handle of the TPM object. The command to get the TPM to test itself will be sent here.

ulPcrIndex

The ulPcrIndex parameter is the index of the PCR to read.

pulPcrValueLength

The pulPcrValueLength parameter receives the length in bytes of the prgbPcrValue parameter.

prgbPcrValue

The prgbPcrValue parameter receives a pointer to the memory block containing the PCR data.

RETURN CODES

Tspi_TPM_PcrRead returns TSS_SUCCESS on success, otherwise one of the following values is returned:

TSS_E_INVALID_HANDLE: hTPM is not a valid handle.
TSS_E_INTERNAL_ERROR: An internal SW error has been detected.
TSS_E_BAD_PARAMETER: One or more parameters is bad.

CONFORMING TO

Tspi_TPM_PcrRead conforms to the Trusted Computing Group Software Specification version 1.1 Golden