/// <summary>
/// Returns error number, i.e. what is left after masking out auxiliary data
/// (such as format selector, version, and bad parameter index) from the
/// response code returned by TPM.
/// </summary>
public static TpmRc ErrorNumber(TpmRc rawResponse)
{
if (Tpm2.IsTbsError(rawResponse) || Tpm2.IsTssError(rawResponse))
{
return(rawResponse);
}
const uint Fmt1 = (uint)TpmRc.RcFmt1; // Format 1 code (TPM 2 only)
const uint Ver1 = (uint)TpmRc.RcVer1; // TPM 1 code (format 0 only)
const uint Warn = (uint)TpmRc.RcWarn; // Code is a warning (format 0 only)
uint mask = IsFmt1(rawResponse) ? Fmt1 | 0x3F : Warn | Ver1 | 0x7F;
return((TpmRc)((uint)rawResponse & mask));
}