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/* $Id: asn1-ut-dyntype-decode.cpp $ */
/** @file
* IPRT - ASN.1, Dynamic Type, Decoding.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* 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) RTAsn1DynType_DecodeAsn1(PRTASN1CURSOR pCursor, uint32_t fFlags, PRTASN1DYNTYPE pDynType, const char *pszErrorTag)
{
RT_ZERO(*pDynType);
Assert(!(fFlags & RTASN1CURSOR_GET_F_IMPLICIT)); RT_NOREF_PV(fFlags);
uint32_t cbSavedLeft = pCursor->cbLeft;
uint8_t const *pbSavedCur = pCursor->pbCur;
int rc = RTAsn1CursorReadHdr(pCursor, &pDynType->u.Core, pszErrorTag);
if (RT_SUCCESS(rc))
{
pDynType->enmType = RTASN1TYPE_CORE;
if (pDynType->u.Core.fClass == (ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_PRIMITIVE))
{
switch (pDynType->u.Core.uTag)
{
case ASN1_TAG_BOOLEAN:
pDynType->enmType = RTASN1TYPE_BOOLEAN;
break;
case ASN1_TAG_INTEGER:
pDynType->enmType = RTASN1TYPE_INTEGER;
break;
//case ASN1_TAG_ENUMERATED:
// pDynType->enmType = RTASN1TYPE_ENUMERATED;
// break;
//case ASN1_TAG_REAL:
// pDynType->enmType = RTASN1TYPE_REAL;
// break;
case ASN1_TAG_BIT_STRING:
pDynType->enmType = RTASN1TYPE_BIT_STRING;
break;
case ASN1_TAG_OCTET_STRING:
pDynType->enmType = RTASN1TYPE_OCTET_STRING;
break;
case ASN1_TAG_NULL:
pDynType->enmType = RTASN1TYPE_NULL;
break;
case ASN1_TAG_SEQUENCE:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 SEQUENCE shall be constructed.");
case ASN1_TAG_SET:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 SET shall be constructed.");
case ASN1_TAG_OID:
pDynType->enmType = RTASN1TYPE_OBJID;
break;
//case ASN1_TAG_RELATIVE_OID:
// pDynType->enmType = RTASN1TYPE_RELATIVE_OBJID;
// break;
case ASN1_TAG_UTC_TIME:
case ASN1_TAG_GENERALIZED_TIME:
pDynType->enmType = RTASN1TYPE_TIME;
break;
case ASN1_TAG_UTF8_STRING:
case ASN1_TAG_NUMERIC_STRING:
case ASN1_TAG_PRINTABLE_STRING:
case ASN1_TAG_T61_STRING:
case ASN1_TAG_VIDEOTEX_STRING:
case ASN1_TAG_IA5_STRING:
case ASN1_TAG_GRAPHIC_STRING:
case ASN1_TAG_VISIBLE_STRING:
case ASN1_TAG_UNIVERSAL_STRING:
case ASN1_TAG_GENERAL_STRING:
case ASN1_TAG_BMP_STRING:
pDynType->enmType = RTASN1TYPE_STRING;
break;
//case ASN1_TAG_CHARACTER_STRING:
// pDynType->enmType = RTASN1TYPE_CHARACTER_STRING;
// break;
default:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_TAG_NOT_IMPL,
"Primitive tag %u (%#x) not implemented.",
pDynType->u.Core.uTag, pDynType->u.Core.uTag);
}
}
else if (pDynType->u.Core.fClass == (ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_CONSTRUCTED))
switch (pDynType->u.Core.uTag)
{
case ASN1_TAG_BOOLEAN:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 BOOLEAN shall be primitive.");
case ASN1_TAG_INTEGER:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 BOOLEAN shall be primitive.");
case ASN1_TAG_ENUMERATED:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 ENUMERATED shall be primitive.");
case ASN1_TAG_REAL:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 REAL shall be primitive.");
case ASN1_TAG_BIT_STRING:
pDynType->enmType = RTASN1TYPE_BIT_STRING;
break;
case ASN1_TAG_OCTET_STRING:
pDynType->enmType = RTASN1TYPE_OCTET_STRING;
break;
case ASN1_TAG_NULL:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 NULL shall be primitive.");
case ASN1_TAG_SEQUENCE:
#if 0
pDynType->enmType = RTASN1TYPE_SEQUENCE_CORE;
pDynType->u.SeqCore.Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT;
RTAsn1CursorSkip(pCursor, pDynType->u.Core.cb);
return VINF_SUCCESS;
#else
pDynType->enmType = RTASN1TYPE_CORE;
#endif
break;
case ASN1_TAG_SET:
#if 0
pDynType->enmType = RTASN1TYPE_SET_CORE;
pDynType->u.SeqCore.Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT;
RTAsn1CursorSkip(pCursor, pDynType->u.Core.cb);
return VINF_SUCCESS;
#else
pDynType->enmType = RTASN1TYPE_CORE;
#endif
break;
case ASN1_TAG_OID:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 OBJECT ID shall be primitive.");
case ASN1_TAG_RELATIVE_OID:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 RELATIVE OID shall be primitive.");
case ASN1_TAG_UTF8_STRING:
case ASN1_TAG_NUMERIC_STRING:
case ASN1_TAG_PRINTABLE_STRING:
case ASN1_TAG_T61_STRING:
case ASN1_TAG_VIDEOTEX_STRING:
case ASN1_TAG_IA5_STRING:
case ASN1_TAG_GRAPHIC_STRING:
case ASN1_TAG_VISIBLE_STRING:
case ASN1_TAG_UNIVERSAL_STRING:
case ASN1_TAG_GENERAL_STRING:
case ASN1_TAG_BMP_STRING:
pDynType->enmType = RTASN1TYPE_STRING;
break;
//case ASN1_TAG_CHARACTER_STRING:
// pDynType->enmType = RTASN1TYPE_CHARACTER_STRING;
// break;
default:
RT_ZERO(*pDynType);
return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_TAG_NOT_IMPL,
"Constructed tag %u (%#x) not implemented.",
pDynType->u.Core.uTag, pDynType->u.Core.uTag);
}
else
Assert(pDynType->enmType == RTASN1TYPE_CORE);
/*
* Restore the cursor and redo with specific type.
*/
pCursor->pbCur = pbSavedCur;
pCursor->cbLeft = cbSavedLeft;
switch (pDynType->enmType)
{
case RTASN1TYPE_INTEGER:
rc = RTAsn1Integer_DecodeAsn1(pCursor, 0, &pDynType->u.Integer, pszErrorTag);
break;
case RTASN1TYPE_BOOLEAN:
rc = RTAsn1Boolean_DecodeAsn1(pCursor, 0, &pDynType->u.Boolean, pszErrorTag);
break;
case RTASN1TYPE_OBJID:
rc = RTAsn1ObjId_DecodeAsn1(pCursor, 0, &pDynType->u.ObjId, pszErrorTag);
break;
case RTASN1TYPE_BIT_STRING:
rc = RTAsn1BitString_DecodeAsn1(pCursor, 0, &pDynType->u.BitString, pszErrorTag);
break;
case RTASN1TYPE_OCTET_STRING:
rc = RTAsn1OctetString_DecodeAsn1(pCursor, 0, &pDynType->u.OctetString, pszErrorTag);
break;
case RTASN1TYPE_NULL:
rc = RTAsn1Null_DecodeAsn1(pCursor, 0, &pDynType->u.Asn1Null, pszErrorTag);
break;
case RTASN1TYPE_TIME:
rc = RTAsn1Time_DecodeAsn1(pCursor, 0, &pDynType->u.Time, pszErrorTag);
break;
case RTASN1TYPE_STRING:
rc = RTAsn1String_DecodeAsn1(pCursor, 0, &pDynType->u.String, pszErrorTag);
break;
case RTASN1TYPE_CORE:
rc = RTAsn1Core_DecodeAsn1(pCursor, 0, &pDynType->u.Core, pszErrorTag);
break;
default:
AssertFailedReturn(VERR_INTERNAL_ERROR_4);
}
if (RT_SUCCESS(rc))
return rc;
}
RT_ZERO(*pDynType);
return rc;
}
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