| 1 | /* $Id: RTNtPathExpand8dot3PathA.cpp 82968 2020-02-04 10:35:17Z 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) 2006-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #define LOG_GROUP RTLOGGROUP_FS
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| 32 | #ifdef IN_SUP_HARDENED_R3
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| 33 | # include <iprt/nt/nt-and-windows.h>
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| 34 | #else
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| 35 | # include <iprt/nt/nt.h>
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| 36 | #endif
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| 37 |
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| 38 | #include <iprt/err.h>
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| 39 | #include <iprt/string.h>
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| 40 | #include <iprt/path.h>
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| 41 | #include <iprt/utf16.h>
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| 42 |
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| 43 |
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| 44 |
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| 45 | /**
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| 46 | * Wrapper around RTNtPathExpand8dot3Path that allocates a buffer instead of
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| 47 | * working on the input buffer.
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| 48 | *
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| 49 | * @returns IPRT status code, see RTNtPathExpand8dot3Path().
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| 50 | * @param pUniStrSrc The path to fix up. MaximumLength is the max buffer
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| 51 | * length.
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| 52 | * @param fPathOnly Whether to only process the path and leave the filename
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| 53 | * as passed in.
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| 54 | * @param pUniStrDst Output string. On success, the caller must use
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| 55 | * RTUtf16Free to free what the Buffer member points to.
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| 56 | * This is all zeros and NULL on failure.
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| 57 | */
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| 58 | RTDECL(int) RTNtPathExpand8dot3PathA(PCUNICODE_STRING pUniStrSrc, bool fPathOnly, PUNICODE_STRING pUniStrDst)
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| 59 | {
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| 60 | /* Guess a reasonable size for the final version. */
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| 61 | size_t const cbShort = pUniStrSrc->Length;
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| 62 | size_t cbLong = RT_MIN(_64K - 1, cbShort * 8);
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| 63 | if (cbLong < RTPATH_MAX)
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| 64 | cbLong = RTPATH_MAX * 2;
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| 65 | AssertCompile(RTPATH_MAX * 2 < _64K);
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| 66 |
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| 67 | pUniStrDst->Buffer = (WCHAR *)RTUtf16Alloc(cbLong);
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| 68 | if (pUniStrDst->Buffer != NULL)
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| 69 | {
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| 70 | /* Copy over the short name and fix it up. */
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| 71 | pUniStrDst->MaximumLength = (uint16_t)cbLong;
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| 72 | pUniStrDst->Length = (uint16_t)cbShort;
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| 73 | memcpy(pUniStrDst->Buffer, pUniStrSrc->Buffer, cbShort);
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| 74 | pUniStrDst->Buffer[cbShort / sizeof(WCHAR)] = '\0';
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| 75 | int rc = RTNtPathExpand8dot3Path(pUniStrDst, fPathOnly);
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| 76 | if (RT_SUCCESS(rc))
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| 77 | return rc;
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| 78 |
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| 79 | /* We failed, bail. */
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| 80 | RTUtf16Free(pUniStrDst->Buffer);
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| 81 | pUniStrDst->Buffer = NULL;
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| 82 | }
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| 83 | pUniStrDst->Length = 0;
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| 84 | pUniStrDst->MaximumLength = 0;
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| 85 | return VERR_NO_UTF16_MEMORY;
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| 86 | }
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| 87 |
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