| 1 | /* $Id: RTNtPathExpand8dot3PathA.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Native NT, RTNtPathExpand8dot3PathA.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2022 Oracle and/or its affiliates.
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| 8 | *
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| 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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| 11 | *
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| 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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| 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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| 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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| 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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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #define LOG_GROUP RTLOGGROUP_FS
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| 42 | #ifdef IN_SUP_HARDENED_R3
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| 43 | # include <iprt/nt/nt-and-windows.h>
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| 44 | #else
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| 45 | # include <iprt/nt/nt.h>
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| 46 | #endif
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| 47 |
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| 48 | #include <iprt/err.h>
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| 49 | #include <iprt/string.h>
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| 50 | #include <iprt/path.h>
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| 51 | #include <iprt/utf16.h>
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| 52 |
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| 53 |
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| 54 |
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| 55 | /**
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| 56 | * Wrapper around RTNtPathExpand8dot3Path that allocates a buffer instead of
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| 57 | * working on the input buffer.
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| 58 | *
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| 59 | * @returns IPRT status code, see RTNtPathExpand8dot3Path().
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| 60 | * @param pUniStrSrc The path to fix up. MaximumLength is the max buffer
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| 61 | * length.
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| 62 | * @param fPathOnly Whether to only process the path and leave the filename
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| 63 | * as passed in.
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| 64 | * @param pUniStrDst Output string. On success, the caller must use
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| 65 | * RTUtf16Free to free what the Buffer member points to.
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| 66 | * This is all zeros and NULL on failure.
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| 67 | */
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| 68 | RTDECL(int) RTNtPathExpand8dot3PathA(PCUNICODE_STRING pUniStrSrc, bool fPathOnly, PUNICODE_STRING pUniStrDst)
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| 69 | {
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| 70 | /* Guess a reasonable size for the final version. */
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| 71 | size_t const cbShort = pUniStrSrc->Length;
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| 72 | size_t cbLong = RT_MIN(_64K - 1, cbShort * 8);
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| 73 | if (cbLong < RTPATH_MAX)
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| 74 | cbLong = RTPATH_MAX * 2;
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| 75 | AssertCompile(RTPATH_MAX * 2 < _64K);
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| 76 |
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| 77 | pUniStrDst->Buffer = (WCHAR *)RTUtf16Alloc(cbLong);
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| 78 | if (pUniStrDst->Buffer != NULL)
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| 79 | {
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| 80 | /* Copy over the short name and fix it up. */
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| 81 | pUniStrDst->MaximumLength = (uint16_t)cbLong;
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| 82 | pUniStrDst->Length = (uint16_t)cbShort;
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| 83 | memcpy(pUniStrDst->Buffer, pUniStrSrc->Buffer, cbShort);
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| 84 | pUniStrDst->Buffer[cbShort / sizeof(WCHAR)] = '\0';
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| 85 | int rc = RTNtPathExpand8dot3Path(pUniStrDst, fPathOnly);
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| 86 | if (RT_SUCCESS(rc))
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| 87 | return rc;
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| 88 |
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| 89 | /* We failed, bail. */
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| 90 | RTUtf16Free(pUniStrDst->Buffer);
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| 91 | pUniStrDst->Buffer = NULL;
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| 92 | }
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| 93 | pUniStrDst->Length = 0;
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| 94 | pUniStrDst->MaximumLength = 0;
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| 95 | return VERR_NO_UTF16_MEMORY;
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| 96 | }
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| 97 |
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