Copyright (C) 2004 International Business Machines Corporation
Written by Megan Schneider based on the Trusted Computing Group Software Stack Specification Version 1.1 Golden

\\$1

.. ..

..

1 TCG Software Stack Developer's Reference

Tspi_TPM_PcrExtend - extend a PCR register and optionally write the PCR event log.

 #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_PcrExtend(TSS_HTPM " hTPM ", UINT32 " ulPcrIndex ","  " UINT32 " ulPcrDataLength ", BYTE* " pbPcrData ","  " TSS_PCR_EVENT* " pPcrEvent ","  " UINT32* " pulPcrValueLength ", BYTE** " prgbPcrValue ");" 

Tspi_TPM_PcrExtend extends a PCR register and writes the PCR event log if one is supplied by the user.

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. The ulPcrIndex parameter is the index of the PCR to extend. The ulPcrDataLength parameter is the length in bytes of the pbPcrData parameter. The pbPcrData parameter is a pointer to data which will be used in the extend operation. The pPcrEvent parameter is the TSS_PCR_EVENT structure to be passed to the TCS to record the extend event. If pPcrEvent is not NULL, the application should fill out the members of the structure that it cares about. The pulPcrValueLength parameter receives the length in bytes of the prgbPcrValue parameter. The prgbPcrValue receives a pointer to the memory block containing the PCR data after the extend operation.

Tspi_TPM_PcrExtend 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.

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

Tspi_TPM_PcrRead(3).