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/* $Id: asn1-ut-null-decode.cpp $ */
/** @file
* IPRT - ASN.1, NULL type, Decoding.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/asn1.h>
#include <iprt/err.h>
#include <iprt/string.h>
#include <iprt/formats/asn1.h>
RTDECL(int) RTAsn1Null_DecodeAsn1(PRTASN1CURSOR pCursor, uint32_t fFlags, PRTASN1NULL pThis, const char *pszErrorTag)
{
int rc = RTAsn1CursorReadHdr(pCursor, &pThis->Asn1Core, pszErrorTag);
if (RT_SUCCESS(rc))
{
rc = RTAsn1CursorMatchTagClassFlags(pCursor, &pThis->Asn1Core, ASN1_TAG_NULL,
ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_PRIMITIVE, fFlags, pszErrorTag, "NULL");
if (RT_SUCCESS(rc))
{
if (pThis->Asn1Core.cb == 0)
{
pThis->Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT;
pThis->Asn1Core.pOps = &g_RTAsn1Null_Vtable;
return VINF_SUCCESS;
}
rc = RTAsn1CursorSetInfo(pCursor, VERR_ASN1_INVALID_NULL_ENCODING,
"%s: Expected NULL object to have zero length: %#x", pszErrorTag, pThis->Asn1Core.cb);
}
}
RT_ZERO(*pThis);
return rc;
}
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