[51770] | 1 | /* $Id: asn1-ut-dyntype-decode.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - ASN.1, Dynamic 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 |
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| 51 | RTDECL(int) RTAsn1DynType_DecodeAsn1(PRTASN1CURSOR pCursor, uint32_t fFlags, PRTASN1DYNTYPE pDynType, const char *pszErrorTag)
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| 52 | {
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| 53 | RT_ZERO(*pDynType);
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| 54 |
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[62564] | 55 | Assert(!(fFlags & RTASN1CURSOR_GET_F_IMPLICIT)); RT_NOREF_PV(fFlags);
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[51770] | 56 | uint32_t cbSavedLeft = pCursor->cbLeft;
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| 57 | uint8_t const *pbSavedCur = pCursor->pbCur;
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| 58 |
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| 59 | int rc = RTAsn1CursorReadHdr(pCursor, &pDynType->u.Core, pszErrorTag);
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| 60 | if (RT_SUCCESS(rc))
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| 61 | {
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| 62 | pDynType->enmType = RTASN1TYPE_CORE;
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| 63 |
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| 64 | if (pDynType->u.Core.fClass == (ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_PRIMITIVE))
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| 65 | {
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| 66 | switch (pDynType->u.Core.uTag)
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| 67 | {
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| 68 | case ASN1_TAG_BOOLEAN:
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| 69 | pDynType->enmType = RTASN1TYPE_BOOLEAN;
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| 70 | break;
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| 71 | case ASN1_TAG_INTEGER:
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| 72 | pDynType->enmType = RTASN1TYPE_INTEGER;
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| 73 | break;
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| 74 | //case ASN1_TAG_ENUMERATED:
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| 75 | // pDynType->enmType = RTASN1TYPE_ENUMERATED;
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| 76 | // break;
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| 77 | //case ASN1_TAG_REAL:
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| 78 | // pDynType->enmType = RTASN1TYPE_REAL;
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| 79 | // break;
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| 80 | case ASN1_TAG_BIT_STRING:
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| 81 | pDynType->enmType = RTASN1TYPE_BIT_STRING;
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| 82 | break;
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| 83 | case ASN1_TAG_OCTET_STRING:
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| 84 | pDynType->enmType = RTASN1TYPE_OCTET_STRING;
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| 85 | break;
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| 86 | case ASN1_TAG_NULL:
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| 87 | pDynType->enmType = RTASN1TYPE_NULL;
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| 88 | break;
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| 89 | case ASN1_TAG_SEQUENCE:
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[52563] | 90 | RT_ZERO(*pDynType);
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[51770] | 91 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 SEQUENCE shall be constructed.");
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| 92 | case ASN1_TAG_SET:
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[52563] | 93 | RT_ZERO(*pDynType);
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[51770] | 94 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 SET shall be constructed.");
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| 95 | case ASN1_TAG_OID:
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| 96 | pDynType->enmType = RTASN1TYPE_OBJID;
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| 97 | break;
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| 98 | //case ASN1_TAG_RELATIVE_OID:
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| 99 | // pDynType->enmType = RTASN1TYPE_RELATIVE_OBJID;
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| 100 | // break;
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| 101 | case ASN1_TAG_UTC_TIME:
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| 102 | case ASN1_TAG_GENERALIZED_TIME:
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| 103 | pDynType->enmType = RTASN1TYPE_TIME;
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| 104 | break;
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| 105 | case ASN1_TAG_UTF8_STRING:
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| 106 | case ASN1_TAG_NUMERIC_STRING:
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| 107 | case ASN1_TAG_PRINTABLE_STRING:
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| 108 | case ASN1_TAG_T61_STRING:
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| 109 | case ASN1_TAG_VIDEOTEX_STRING:
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| 110 | case ASN1_TAG_IA5_STRING:
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| 111 | case ASN1_TAG_GRAPHIC_STRING:
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| 112 | case ASN1_TAG_VISIBLE_STRING:
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| 113 | case ASN1_TAG_UNIVERSAL_STRING:
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| 114 | case ASN1_TAG_GENERAL_STRING:
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| 115 | case ASN1_TAG_BMP_STRING:
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| 116 | pDynType->enmType = RTASN1TYPE_STRING;
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| 117 | break;
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| 118 | //case ASN1_TAG_CHARACTER_STRING:
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| 119 | // pDynType->enmType = RTASN1TYPE_CHARACTER_STRING;
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| 120 | // break;
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| 121 |
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| 122 | default:
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[52563] | 123 | RT_ZERO(*pDynType);
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[51770] | 124 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_TAG_NOT_IMPL,
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| 125 | "Primitive tag %u (%#x) not implemented.",
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| 126 | pDynType->u.Core.uTag, pDynType->u.Core.uTag);
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| 127 | }
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| 128 | }
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| 129 | else if (pDynType->u.Core.fClass == (ASN1_TAGCLASS_UNIVERSAL | ASN1_TAGFLAG_CONSTRUCTED))
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| 130 | switch (pDynType->u.Core.uTag)
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| 131 | {
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| 132 | case ASN1_TAG_BOOLEAN:
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[52563] | 133 | RT_ZERO(*pDynType);
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[51770] | 134 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 BOOLEAN shall be primitive.");
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| 135 | case ASN1_TAG_INTEGER:
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[52563] | 136 | RT_ZERO(*pDynType);
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[51770] | 137 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 BOOLEAN shall be primitive.");
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| 138 | case ASN1_TAG_ENUMERATED:
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[52563] | 139 | RT_ZERO(*pDynType);
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[51770] | 140 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 ENUMERATED shall be primitive.");
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| 141 | case ASN1_TAG_REAL:
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[52563] | 142 | RT_ZERO(*pDynType);
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[51770] | 143 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 REAL shall be primitive.");
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| 144 | case ASN1_TAG_BIT_STRING:
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| 145 | pDynType->enmType = RTASN1TYPE_BIT_STRING;
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| 146 | break;
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| 147 | case ASN1_TAG_OCTET_STRING:
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| 148 | pDynType->enmType = RTASN1TYPE_OCTET_STRING;
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| 149 | break;
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| 150 | case ASN1_TAG_NULL:
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[52563] | 151 | RT_ZERO(*pDynType);
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[51770] | 152 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 NULL shall be primitive.");
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| 153 | case ASN1_TAG_SEQUENCE:
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| 154 | #if 0
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| 155 | pDynType->enmType = RTASN1TYPE_SEQUENCE_CORE;
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| 156 | pDynType->u.SeqCore.Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT;
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| 157 | RTAsn1CursorSkip(pCursor, pDynType->u.Core.cb);
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| 158 | return VINF_SUCCESS;
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| 159 | #else
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| 160 | pDynType->enmType = RTASN1TYPE_CORE;
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| 161 | #endif
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| 162 | break;
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| 163 | case ASN1_TAG_SET:
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| 164 | #if 0
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| 165 | pDynType->enmType = RTASN1TYPE_SET_CORE;
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| 166 | pDynType->u.SeqCore.Asn1Core.fFlags |= RTASN1CORE_F_PRIMITE_TAG_STRUCT;
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| 167 | RTAsn1CursorSkip(pCursor, pDynType->u.Core.cb);
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| 168 | return VINF_SUCCESS;
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| 169 | #else
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| 170 | pDynType->enmType = RTASN1TYPE_CORE;
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| 171 | #endif
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| 172 | break;
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| 173 | case ASN1_TAG_OID:
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[52563] | 174 | RT_ZERO(*pDynType);
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[51770] | 175 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 OBJECT ID shall be primitive.");
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| 176 | case ASN1_TAG_RELATIVE_OID:
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[52563] | 177 | RT_ZERO(*pDynType);
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[51770] | 178 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_BAD_TAG, "ASN.1 RELATIVE OID shall be primitive.");
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| 179 |
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| 180 | case ASN1_TAG_UTF8_STRING:
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| 181 | case ASN1_TAG_NUMERIC_STRING:
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| 182 | case ASN1_TAG_PRINTABLE_STRING:
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| 183 | case ASN1_TAG_T61_STRING:
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| 184 | case ASN1_TAG_VIDEOTEX_STRING:
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| 185 | case ASN1_TAG_IA5_STRING:
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| 186 | case ASN1_TAG_GRAPHIC_STRING:
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| 187 | case ASN1_TAG_VISIBLE_STRING:
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| 188 | case ASN1_TAG_UNIVERSAL_STRING:
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| 189 | case ASN1_TAG_GENERAL_STRING:
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| 190 | case ASN1_TAG_BMP_STRING:
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| 191 | pDynType->enmType = RTASN1TYPE_STRING;
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| 192 | break;
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| 193 | //case ASN1_TAG_CHARACTER_STRING:
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| 194 | // pDynType->enmType = RTASN1TYPE_CHARACTER_STRING;
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| 195 | // break;
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| 196 |
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| 197 | default:
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[52563] | 198 | RT_ZERO(*pDynType);
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[51770] | 199 | return RTAsn1CursorSetInfo(pCursor, VERR_ASN1_DYNTYPE_TAG_NOT_IMPL,
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| 200 | "Constructed tag %u (%#x) not implemented.",
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| 201 | pDynType->u.Core.uTag, pDynType->u.Core.uTag);
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| 202 | }
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| 203 | else
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[93244] | 204 | Assert(pDynType->enmType == RTASN1TYPE_CORE);
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[51770] | 205 |
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| 206 | /*
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| 207 | * Restore the cursor and redo with specific type.
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| 208 | */
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| 209 | pCursor->pbCur = pbSavedCur;
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| 210 | pCursor->cbLeft = cbSavedLeft;
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| 211 |
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| 212 | switch (pDynType->enmType)
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| 213 | {
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| 214 | case RTASN1TYPE_INTEGER:
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| 215 | rc = RTAsn1Integer_DecodeAsn1(pCursor, 0, &pDynType->u.Integer, pszErrorTag);
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| 216 | break;
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| 217 | case RTASN1TYPE_BOOLEAN:
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| 218 | rc = RTAsn1Boolean_DecodeAsn1(pCursor, 0, &pDynType->u.Boolean, pszErrorTag);
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| 219 | break;
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| 220 | case RTASN1TYPE_OBJID:
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| 221 | rc = RTAsn1ObjId_DecodeAsn1(pCursor, 0, &pDynType->u.ObjId, pszErrorTag);
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| 222 | break;
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| 223 | case RTASN1TYPE_BIT_STRING:
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| 224 | rc = RTAsn1BitString_DecodeAsn1(pCursor, 0, &pDynType->u.BitString, pszErrorTag);
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| 225 | break;
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| 226 | case RTASN1TYPE_OCTET_STRING:
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| 227 | rc = RTAsn1OctetString_DecodeAsn1(pCursor, 0, &pDynType->u.OctetString, pszErrorTag);
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| 228 | break;
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| 229 | case RTASN1TYPE_NULL:
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| 230 | rc = RTAsn1Null_DecodeAsn1(pCursor, 0, &pDynType->u.Asn1Null, pszErrorTag);
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| 231 | break;
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| 232 | case RTASN1TYPE_TIME:
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| 233 | rc = RTAsn1Time_DecodeAsn1(pCursor, 0, &pDynType->u.Time, pszErrorTag);
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| 234 | break;
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| 235 | case RTASN1TYPE_STRING:
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| 236 | rc = RTAsn1String_DecodeAsn1(pCursor, 0, &pDynType->u.String, pszErrorTag);
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| 237 | break;
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| 238 | case RTASN1TYPE_CORE:
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| 239 | rc = RTAsn1Core_DecodeAsn1(pCursor, 0, &pDynType->u.Core, pszErrorTag);
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| 240 | break;
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| 241 | default:
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| 242 | AssertFailedReturn(VERR_INTERNAL_ERROR_4);
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| 243 | }
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[52563] | 244 | if (RT_SUCCESS(rc))
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| 245 | return rc;
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[51770] | 246 | }
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[52563] | 247 | RT_ZERO(*pDynType);
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[51770] | 248 | return rc;
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| 249 | }
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| 250 |
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