NAME

       Tspi_TPM_GetAuditDigest - retrieve the audit digest.

SYNOPSIS

       #include <tss/tspi.h>

       TSS_RESULT Tspi_TPM_GetAuditDigest(TSS_HTPM        hTpm,            TSS_HKEY           hKey,
                                          TSS_BOOL        closeAudit,      UINT32*            pulAuditDigestSize,
                                          BYTE**          prgbAuditDigest, TPM_COUNTER_VALUE* pCounterValue,
                                          TSS_VALIDATION* pValidationData, UINT32*            ordSize,
                                          UINT32**        ordList);

DESCRIPTION

       Tspi_TPM_GetAuditDigest   is  used  to  retrieve  the  audit  digest.   The audit digest may be signed or
       unsigned.  If the audit digest is signed (hKey is non-NULL) then the current audit  digest,  the  current
       audit counter and, optionally, the hash of the audited ordinal list and a signature are returned.  If the
       audit digest is not signed (hKey is NULL) then the current audit digest, the current  audit  counter  and
       the full list of audited ordinals is returned.

PARAMETERS

   hTpm
       Handle of the TPM object.

   hKey
       Handle of the signature key object (the handle can be NULL).

   closeAudit
       A flag indicating whether or not to close the current audit digest after it is signed.  This parameter is
       ignored if hKey is NULL.

   pulAuditDigestSize
       Pointer to the size of the returned audit digest.

   prgbAuditDigest
       Pointer to a buffer that holds the returned audit digest.

   pCounterValue
       Pointer to a TPM_COUNTER_VALUE structure that holds the returned audit counter.

   pValidationData
       Pointer to a validation data structure.  The validation  data  structure  provides  external  information
       required  to  compute  the signature.  On input, the fields representing the ExternalData must contain an
       anti-replay nonce that will be used in the signing operation.   On  output,  this  structure  provides  a
       buffer  containing  the  data  used to compute the validation data and a buffer containing the validation
       data (a signature generated by signing the data using the key referenced by hKey).  If this parameter  is
       NULL then the TSS will perform the validation.  This parameter is ignored if hKey is NULL.

   ordSize
       Pointer  to  the  number  of ordinals in the returned audited ordinal list.  This parameter is ignored if
       hKey is non-NULL.

   ordList
       Pointer to a buffer that holds the returned audited ordinal list.  This parameter is ignored if  hKey  is
       non-NULL.

RETURN CODES

       Tspi_TPM_GetAuditDigest  returns  TSS_SUCCESS  on  success,  otherwise  one  of  the following values are
       returned:

       TSS_E_INVALID_HANDLE

       TSS_E_BAD_PARAMETER

       TSS_E_INTERNAL_ERROR - An error occurred internal to the TSS.

CONFORMING TO

       Tspi_TPM_GetAuditDigest conforms to the Trusted Computing Group Software Specification Version 1.2