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 Copyright (C) 2006 International Business Machines Corporation
 Written by Kent Yoder based on the Trusted Computing Group Software Stack Specification Version 1.1 Golden


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 "Tspi_TPM_DirRead" 3 "2004-05-25" "TSS 1.1"
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TCG Software Stack Developer's Reference

 NAME
Tspi_TPM_DirRead - Read a Data Integrity Register

 "SYNOPSIS"
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 #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_DirRead(TSS_HTPM " hTPM ", UINT32 " ulDirIndex ","  " UINT32* " pulDirDataLength ", BYTE** " prgbDirData ");" 

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 "DESCRIPTION"

Tspi_TPM_DirRead reads a data integrity register. DIRs are non-volatile (persistent
across reboots) memory areas maintained by the TPM.


 "PARAMETERS"


 hTPM
The hTPM parameter is used to specify the handle of the TPM
object.

 ulDirIndex
The ulDirIndex parameter is the index of the DIR to read. To query the TPM for the
number of DIR registers it supports, use Tspi_TPM_GetCapability(3).

 pulDirDataLength
The pulDirDataLength parameter receives the length in bytes of the prgbDirData parameter.

 prgbDirData
The prgbDirData parameter receives a pointer to memory containing the DIR data.


 "RETURN CODES"

Tspi_TPM_DirRead 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_DirRead conforms to the Trusted Computing Group Software
Specification version 1.1 Golden


 "SEE ALSO"

Tspi_TPM_GetCapability(3), Tspi_TPM_DirWrite(3).