[51770] | 1 | /* $Id: asn1-ut-integer-decode.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - ASN.1, INTEGER Type, Decoding.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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[51770] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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[51770] | 11 | *
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[96407] | 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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[51770] | 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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[96407] | 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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[51770] | 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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[96407] | 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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[51770] | 35 | */
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| 36 |
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[57358] | 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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[51770] | 41 | #include "internal/iprt.h"
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| 42 | #include <iprt/asn1.h>
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| 43 |
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| 44 | #include <iprt/err.h>
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| 45 | #include <iprt/string.h>
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| 46 |
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| 47 | #include <iprt/formats/asn1.h>
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| 48 |
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| 49 |
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| 50 | RTDECL(int) RTAsn1Integer_DecodeAsn1(PRTASN1CURSOR pCursor, uint32_t fFlags, PRTASN1INTEGER pThis, const char *pszErrorTag)
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| 51 | {
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| 52 | pThis->uValue.u = 0;
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| 53 | int rc = RTAsn1CursorReadHdr(pCursor, &pThis->Asn1Core, pszErrorTag);
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| 54 | if (RT_SUCCESS(rc))
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| 55 | {
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| 56 | rc = RTAsn1CursorMatchTagClassFlags(pCursor, &pThis->Asn1Core, ASN1_TAG_INTEGER,
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| 57 | ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_PRIMITIVE,
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| 58 | fFlags, pszErrorTag, "INTEGER");
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| 59 | if (RT_SUCCESS(rc))
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| 60 | {
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[72367] | 61 | if (pThis->Asn1Core.cb > 0)
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[51770] | 62 | {
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[72367] | 63 | uint32_t offLast = pThis->Asn1Core.cb - 1;
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| 64 | switch (pThis->Asn1Core.cb)
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| 65 | {
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| 66 | default:
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| 67 | case 8: pThis->uValue.u |= (uint64_t)pThis->Asn1Core.uData.pu8[offLast - 7] << 56; RT_FALL_THRU();
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| 68 | case 7: pThis->uValue.u |= (uint64_t)pThis->Asn1Core.uData.pu8[offLast - 6] << 48; RT_FALL_THRU();
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| 69 | case 6: pThis->uValue.u |= (uint64_t)pThis->Asn1Core.uData.pu8[offLast - 5] << 40; RT_FALL_THRU();
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| 70 | case 5: pThis->uValue.u |= (uint64_t)pThis->Asn1Core.uData.pu8[offLast - 4] << 32; RT_FALL_THRU();
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| 71 | case 4: pThis->uValue.u |= (uint32_t)pThis->Asn1Core.uData.pu8[offLast - 3] << 24; RT_FALL_THRU();
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| 72 | case 3: pThis->uValue.u |= (uint32_t)pThis->Asn1Core.uData.pu8[offLast - 2] << 16; RT_FALL_THRU();
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| 73 | case 2: pThis->uValue.u |= (uint16_t)pThis->Asn1Core.uData.pu8[offLast - 1] << 8; RT_FALL_THRU();
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| 74 | case 1: pThis->uValue.u |= pThis->Asn1Core.uData.pu8[offLast];
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| 75 | }
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| 76 | RTAsn1CursorSkip(pCursor, pThis->Asn1Core.cb);
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| 77 | pThis->Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT;
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| 78 | pThis->Asn1Core.pOps = &g_RTAsn1Integer_Vtable;
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| 79 | return VINF_SUCCESS;
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[51770] | 80 | }
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[72369] | 81 | rc = RTAsn1CursorSetInfo(pCursor, VERR_ASN1_INVALID_INTEGER_ENCODING,
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| 82 | "%s: Invalid integer length, exepcted more than 0: %#x",
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| 83 | pszErrorTag, pThis->Asn1Core.cb);
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[51770] | 84 | }
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| 85 | }
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[52563] | 86 | RT_ZERO(*pThis);
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[51770] | 87 | return rc;
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| 88 | }
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| 89 |
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| 90 |
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| 91 | /*
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| 92 | * Generate code for the associated collection types.
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| 93 | */
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| 94 | #define RTASN1TMPL_TEMPLATE_FILE "../common/asn1/asn1-ut-integer-template.h"
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| 95 | #include <iprt/asn1-generator-internal-header.h>
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| 96 | #include <iprt/asn1-generator-asn1-decoder.h>
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| 97 |
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