Milestone 5: deliver embedded RDP sessions and lifecycle hardening
This commit is contained in:
771
third_party/FreeRDP/winpr/libwinpr/clipboard/clipboard.c
vendored
Normal file
771
third_party/FreeRDP/winpr/libwinpr/clipboard/clipboard.c
vendored
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@@ -0,0 +1,771 @@
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/**
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* WinPR: Windows Portable Runtime
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* Clipboard Functions
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*
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* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <winpr/config.h>
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#include <winpr/crt.h>
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#include <winpr/collections.h>
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#include <winpr/wlog.h>
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#include <winpr/clipboard.h>
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#include "clipboard.h"
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#include "synthetic_file.h"
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#include "../log.h"
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#define TAG WINPR_TAG("clipboard")
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const char* const mime_text_plain = "text/plain";
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/**
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* Clipboard (Windows):
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* msdn.microsoft.com/en-us/library/windows/desktop/ms648709/
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*
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* W3C Clipboard API and events:
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* http://www.w3.org/TR/clipboard-apis/
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*/
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static const char* CF_STANDARD_STRINGS[] = {
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"CF_RAW", /* 0 */
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"CF_TEXT", /* 1 */
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"CF_BITMAP", /* 2 */
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"CF_METAFILEPICT", /* 3 */
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"CF_SYLK", /* 4 */
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"CF_DIF", /* 5 */
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"CF_TIFF", /* 6 */
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"CF_OEMTEXT", /* 7 */
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"CF_DIB", /* 8 */
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"CF_PALETTE", /* 9 */
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"CF_PENDATA", /* 10 */
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"CF_RIFF", /* 11 */
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"CF_WAVE", /* 12 */
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"CF_UNICODETEXT", /* 13 */
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"CF_ENHMETAFILE", /* 14 */
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"CF_HDROP", /* 15 */
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"CF_LOCALE", /* 16 */
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"CF_DIBV5" /* 17 */
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};
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const char* ClipboardGetFormatIdString(UINT32 formatId)
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{
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if (formatId < ARRAYSIZE(CF_STANDARD_STRINGS))
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return CF_STANDARD_STRINGS[formatId];
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return "CF_REGISTERED_FORMAT";
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}
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static wClipboardFormat* ClipboardFindFormat(wClipboard* clipboard, UINT32 formatId,
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const char* name)
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{
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wClipboardFormat* format = nullptr;
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if (!clipboard)
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return nullptr;
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if (formatId)
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{
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for (UINT32 index = 0; index < clipboard->numFormats; index++)
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{
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wClipboardFormat* cformat = &clipboard->formats[index];
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if (formatId == cformat->formatId)
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{
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format = cformat;
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break;
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}
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}
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}
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else if (name)
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{
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for (UINT32 index = 0; index < clipboard->numFormats; index++)
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{
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wClipboardFormat* cformat = &clipboard->formats[index];
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if (!cformat->formatName)
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continue;
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if (strcmp(name, cformat->formatName) == 0)
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{
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format = cformat;
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break;
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}
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}
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}
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else
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{
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/* special "CF_RAW" case */
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if (clipboard->numFormats > 0)
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{
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format = &clipboard->formats[0];
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if (format->formatId)
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return nullptr;
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if (!format->formatName || (strcmp(format->formatName, CF_STANDARD_STRINGS[0]) == 0))
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return format;
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}
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}
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return format;
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}
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static wClipboardSynthesizer* ClipboardFindSynthesizer(wClipboardFormat* format, UINT32 formatId)
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{
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if (!format)
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return nullptr;
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for (UINT32 index = 0; index < format->numSynthesizers; index++)
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{
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wClipboardSynthesizer* synthesizer = &(format->synthesizers[index]);
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if (formatId == synthesizer->syntheticId)
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return synthesizer;
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}
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return nullptr;
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}
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void ClipboardLock(wClipboard* clipboard)
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{
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if (!clipboard)
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return;
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EnterCriticalSection(&(clipboard->lock));
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}
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void ClipboardUnlock(wClipboard* clipboard)
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{
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if (!clipboard)
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return;
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LeaveCriticalSection(&(clipboard->lock));
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}
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BOOL ClipboardEmpty(wClipboard* clipboard)
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{
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if (!clipboard)
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return FALSE;
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if (clipboard->data)
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{
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free(clipboard->data);
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clipboard->data = nullptr;
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}
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clipboard->size = 0;
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clipboard->formatId = 0;
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clipboard->sequenceNumber++;
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return TRUE;
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}
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UINT32 ClipboardCountRegisteredFormats(wClipboard* clipboard)
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{
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if (!clipboard)
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return 0;
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return clipboard->numFormats;
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}
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UINT32 ClipboardGetRegisteredFormatIds(wClipboard* clipboard, UINT32** ppFormatIds)
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{
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UINT32* pFormatIds = nullptr;
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wClipboardFormat* format = nullptr;
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if (!clipboard)
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return 0;
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if (!ppFormatIds)
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return 0;
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pFormatIds = *ppFormatIds;
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if (!pFormatIds)
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{
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pFormatIds = calloc(clipboard->numFormats, sizeof(UINT32));
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if (!pFormatIds)
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return 0;
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*ppFormatIds = pFormatIds;
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}
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for (UINT32 index = 0; index < clipboard->numFormats; index++)
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{
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format = &(clipboard->formats[index]);
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pFormatIds[index] = format->formatId;
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}
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return clipboard->numFormats;
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}
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UINT32 ClipboardRegisterFormat(wClipboard* clipboard, const char* name)
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{
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wClipboardFormat* format = nullptr;
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if (!clipboard)
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return 0;
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format = ClipboardFindFormat(clipboard, 0, name);
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if (format)
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return format->formatId;
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if ((clipboard->numFormats + 1) >= clipboard->maxFormats)
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{
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UINT32 numFormats = clipboard->maxFormats * 2;
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wClipboardFormat* tmpFormat = nullptr;
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tmpFormat =
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(wClipboardFormat*)realloc(clipboard->formats, numFormats * sizeof(wClipboardFormat));
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if (!tmpFormat)
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return 0;
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clipboard->formats = tmpFormat;
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clipboard->maxFormats = numFormats;
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}
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format = &(clipboard->formats[clipboard->numFormats]);
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ZeroMemory(format, sizeof(wClipboardFormat));
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if (name)
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{
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format->formatName = _strdup(name);
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if (!format->formatName)
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return 0;
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}
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format->formatId = clipboard->nextFormatId++;
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clipboard->numFormats++;
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return format->formatId;
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}
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BOOL ClipboardRegisterSynthesizer(wClipboard* clipboard, UINT32 formatId, UINT32 syntheticId,
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CLIPBOARD_SYNTHESIZE_FN pfnSynthesize)
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{
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UINT32 index = 0;
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wClipboardFormat* format = nullptr;
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wClipboardSynthesizer* synthesizer = nullptr;
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if (!clipboard)
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return FALSE;
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format = ClipboardFindFormat(clipboard, formatId, nullptr);
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if (!format)
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return FALSE;
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if (format->formatId == syntheticId)
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return FALSE;
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synthesizer = ClipboardFindSynthesizer(format, formatId);
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if (!synthesizer)
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{
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wClipboardSynthesizer* tmpSynthesizer = nullptr;
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UINT32 numSynthesizers = format->numSynthesizers + 1;
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tmpSynthesizer = (wClipboardSynthesizer*)realloc(
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format->synthesizers, numSynthesizers * sizeof(wClipboardSynthesizer));
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if (!tmpSynthesizer)
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return FALSE;
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format->synthesizers = tmpSynthesizer;
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format->numSynthesizers = numSynthesizers;
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index = numSynthesizers - 1;
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synthesizer = &(format->synthesizers[index]);
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}
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synthesizer->syntheticId = syntheticId;
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synthesizer->pfnSynthesize = pfnSynthesize;
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return TRUE;
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}
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UINT32 ClipboardCountFormats(wClipboard* clipboard)
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{
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UINT32 count = 0;
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wClipboardFormat* format = nullptr;
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if (!clipboard)
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return 0;
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format = ClipboardFindFormat(clipboard, clipboard->formatId, nullptr);
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if (!format)
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return 0;
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count = 1 + format->numSynthesizers;
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return count;
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}
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UINT32 ClipboardGetFormatIds(wClipboard* clipboard, UINT32** ppFormatIds)
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{
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UINT32 count = 0;
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UINT32* pFormatIds = nullptr;
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wClipboardFormat* format = nullptr;
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wClipboardSynthesizer* synthesizer = nullptr;
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if (!clipboard)
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return 0;
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format = ClipboardFindFormat(clipboard, clipboard->formatId, nullptr);
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if (!format)
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return 0;
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count = 1 + format->numSynthesizers;
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if (!ppFormatIds)
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return 0;
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pFormatIds = *ppFormatIds;
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if (!pFormatIds)
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{
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pFormatIds = calloc(count, sizeof(UINT32));
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||||
if (!pFormatIds)
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return 0;
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*ppFormatIds = pFormatIds;
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}
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pFormatIds[0] = format->formatId;
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for (UINT32 index = 1; index < count; index++)
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{
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synthesizer = &(format->synthesizers[index - 1]);
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pFormatIds[index] = synthesizer->syntheticId;
|
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}
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return count;
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}
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static void ClipboardUninitFormats(wClipboard* clipboard)
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{
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WINPR_ASSERT(clipboard);
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for (UINT32 formatId = 0; formatId < clipboard->numFormats; formatId++)
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||||
{
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wClipboardFormat* format = &clipboard->formats[formatId];
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free(format->formatName);
|
||||
free(format->synthesizers);
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format->formatName = nullptr;
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||||
format->synthesizers = nullptr;
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}
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||||
}
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static BOOL ClipboardInitFormats(wClipboard* clipboard)
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||||
{
|
||||
UINT32 formatId = 0;
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wClipboardFormat* format = nullptr;
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||||
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||||
if (!clipboard)
|
||||
return FALSE;
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||||
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||||
for (formatId = 0; formatId < CF_MAX; formatId++, clipboard->numFormats++)
|
||||
{
|
||||
format = &(clipboard->formats[clipboard->numFormats]);
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||||
ZeroMemory(format, sizeof(wClipboardFormat));
|
||||
format->formatId = formatId;
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||||
format->formatName = _strdup(CF_STANDARD_STRINGS[formatId]);
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||||
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||||
if (!format->formatName)
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goto error;
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}
|
||||
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||||
if (!ClipboardInitSynthesizers(clipboard))
|
||||
goto error;
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||||
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||||
return TRUE;
|
||||
error:
|
||||
|
||||
ClipboardUninitFormats(clipboard);
|
||||
return FALSE;
|
||||
}
|
||||
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UINT32 ClipboardGetFormatId(wClipboard* clipboard, const char* name)
|
||||
{
|
||||
wClipboardFormat* format = nullptr;
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||||
|
||||
if (!clipboard)
|
||||
return 0;
|
||||
|
||||
format = ClipboardFindFormat(clipboard, 0, name);
|
||||
|
||||
if (!format)
|
||||
return 0;
|
||||
|
||||
return format->formatId;
|
||||
}
|
||||
|
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const char* ClipboardGetFormatName(wClipboard* clipboard, UINT32 formatId)
|
||||
{
|
||||
wClipboardFormat* format = nullptr;
|
||||
|
||||
if (!clipboard)
|
||||
return nullptr;
|
||||
|
||||
format = ClipboardFindFormat(clipboard, formatId, nullptr);
|
||||
|
||||
if (!format)
|
||||
return nullptr;
|
||||
|
||||
return format->formatName;
|
||||
}
|
||||
|
||||
void* ClipboardGetData(wClipboard* clipboard, UINT32 formatId, UINT32* pSize)
|
||||
{
|
||||
UINT32 SrcSize = 0;
|
||||
UINT32 DstSize = 0;
|
||||
void* pSrcData = nullptr;
|
||||
void* pDstData = nullptr;
|
||||
wClipboardFormat* format = nullptr;
|
||||
wClipboardSynthesizer* synthesizer = nullptr;
|
||||
|
||||
if (!clipboard || !pSize)
|
||||
{
|
||||
WLog_ERR(TAG, "Invalid parameters clipboard=%p, pSize=%p",
|
||||
WINPR_CXX_COMPAT_CAST(const void*, clipboard),
|
||||
WINPR_CXX_COMPAT_CAST(const void*, pSize));
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
*pSize = 0;
|
||||
format = ClipboardFindFormat(clipboard, clipboard->formatId, nullptr);
|
||||
|
||||
if (!format)
|
||||
{
|
||||
WLog_ERR(TAG, "Format [0x%08" PRIx32 "] not found", clipboard->formatId);
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
SrcSize = clipboard->size;
|
||||
pSrcData = clipboard->data;
|
||||
|
||||
if (formatId == format->formatId)
|
||||
{
|
||||
DstSize = SrcSize;
|
||||
pDstData = malloc(DstSize);
|
||||
|
||||
if (!pDstData)
|
||||
return nullptr;
|
||||
|
||||
CopyMemory(pDstData, pSrcData, SrcSize);
|
||||
*pSize = DstSize;
|
||||
}
|
||||
else
|
||||
{
|
||||
synthesizer = ClipboardFindSynthesizer(format, formatId);
|
||||
|
||||
if (!synthesizer || !synthesizer->pfnSynthesize)
|
||||
{
|
||||
WLog_ERR(TAG, "No synthesizer for format %s [0x%08" PRIx32 "] --> %s [0x%08" PRIx32 "]",
|
||||
ClipboardGetFormatName(clipboard, clipboard->formatId), clipboard->formatId,
|
||||
ClipboardGetFormatName(clipboard, formatId), formatId);
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
DstSize = SrcSize;
|
||||
pDstData = synthesizer->pfnSynthesize(clipboard, format->formatId, pSrcData, &DstSize);
|
||||
if (pDstData)
|
||||
*pSize = DstSize;
|
||||
}
|
||||
|
||||
WLog_DBG(TAG, "getting formatId=%s [0x%08" PRIx32 "] data=%p, size=%" PRIu32,
|
||||
ClipboardGetFormatName(clipboard, formatId), formatId, pDstData, *pSize);
|
||||
return pDstData;
|
||||
}
|
||||
|
||||
BOOL ClipboardSetData(wClipboard* clipboard, UINT32 formatId, const void* data, UINT32 size)
|
||||
{
|
||||
wClipboardFormat* format = nullptr;
|
||||
|
||||
WLog_DBG(TAG, "setting formatId=%s [0x%08" PRIx32 "], size=%" PRIu32,
|
||||
ClipboardGetFormatName(clipboard, formatId), formatId, size);
|
||||
if (!clipboard)
|
||||
return FALSE;
|
||||
|
||||
format = ClipboardFindFormat(clipboard, formatId, nullptr);
|
||||
|
||||
if (!format)
|
||||
return FALSE;
|
||||
|
||||
free(clipboard->data);
|
||||
|
||||
clipboard->data = calloc(size + sizeof(WCHAR), sizeof(char));
|
||||
|
||||
if (!clipboard->data)
|
||||
return FALSE;
|
||||
|
||||
memcpy(clipboard->data, data, size);
|
||||
|
||||
/* For string values we don´t know if they are '\0' terminated.
|
||||
* so set the size to the full length in bytes (e.g. string length + 1)
|
||||
*/
|
||||
switch (formatId)
|
||||
{
|
||||
case CF_TEXT:
|
||||
case CF_OEMTEXT:
|
||||
clipboard->size = (UINT32)(strnlen(clipboard->data, size) + 1UL);
|
||||
break;
|
||||
case CF_UNICODETEXT:
|
||||
clipboard->size =
|
||||
(UINT32)((_wcsnlen(clipboard->data, size / sizeof(WCHAR)) + 1UL) * sizeof(WCHAR));
|
||||
break;
|
||||
default:
|
||||
clipboard->size = size;
|
||||
break;
|
||||
}
|
||||
|
||||
clipboard->formatId = formatId;
|
||||
clipboard->sequenceNumber++;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
UINT64 ClipboardGetOwner(wClipboard* clipboard)
|
||||
{
|
||||
if (!clipboard)
|
||||
return 0;
|
||||
|
||||
return clipboard->ownerId;
|
||||
}
|
||||
|
||||
void ClipboardSetOwner(wClipboard* clipboard, UINT64 ownerId)
|
||||
{
|
||||
if (!clipboard)
|
||||
return;
|
||||
|
||||
clipboard->ownerId = ownerId;
|
||||
}
|
||||
|
||||
wClipboardDelegate* ClipboardGetDelegate(wClipboard* clipboard)
|
||||
{
|
||||
if (!clipboard)
|
||||
return nullptr;
|
||||
|
||||
return &clipboard->delegate;
|
||||
}
|
||||
|
||||
static void ClipboardInitLocalFileSubsystem(wClipboard* clipboard)
|
||||
{
|
||||
/*
|
||||
* There can be only one local file subsystem active.
|
||||
* Return as soon as initialization succeeds.
|
||||
*/
|
||||
if (ClipboardInitSyntheticFileSubsystem(clipboard))
|
||||
{
|
||||
WLog_DBG(TAG, "initialized synthetic local file subsystem");
|
||||
return;
|
||||
}
|
||||
else
|
||||
{
|
||||
WLog_WARN(TAG, "failed to initialize synthetic local file subsystem");
|
||||
}
|
||||
|
||||
WLog_INFO(TAG, "failed to initialize local file subsystem, file transfer not available");
|
||||
}
|
||||
|
||||
wClipboard* ClipboardCreate(void)
|
||||
{
|
||||
wClipboard* clipboard = (wClipboard*)calloc(1, sizeof(wClipboard));
|
||||
|
||||
if (!clipboard)
|
||||
return nullptr;
|
||||
|
||||
clipboard->nextFormatId = 0xC000;
|
||||
clipboard->sequenceNumber = 0;
|
||||
|
||||
if (!InitializeCriticalSectionAndSpinCount(&(clipboard->lock), 4000))
|
||||
goto fail;
|
||||
|
||||
clipboard->numFormats = 0;
|
||||
clipboard->maxFormats = 64;
|
||||
clipboard->formats = (wClipboardFormat*)calloc(clipboard->maxFormats, sizeof(wClipboardFormat));
|
||||
|
||||
if (!clipboard->formats)
|
||||
goto fail;
|
||||
|
||||
if (!ClipboardInitFormats(clipboard))
|
||||
goto fail;
|
||||
|
||||
clipboard->delegate.clipboard = clipboard;
|
||||
ClipboardInitLocalFileSubsystem(clipboard);
|
||||
return clipboard;
|
||||
fail:
|
||||
ClipboardDestroy(clipboard);
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
void ClipboardDestroy(wClipboard* clipboard)
|
||||
{
|
||||
if (!clipboard)
|
||||
return;
|
||||
|
||||
ArrayList_Free(clipboard->localFiles);
|
||||
clipboard->localFiles = nullptr;
|
||||
|
||||
ClipboardUninitFormats(clipboard);
|
||||
|
||||
free(clipboard->data);
|
||||
clipboard->data = nullptr;
|
||||
clipboard->size = 0;
|
||||
clipboard->numFormats = 0;
|
||||
free(clipboard->formats);
|
||||
DeleteCriticalSection(&(clipboard->lock));
|
||||
free(clipboard);
|
||||
}
|
||||
|
||||
static BOOL is_dos_drive(const char* path, size_t len)
|
||||
{
|
||||
if (len < 2)
|
||||
return FALSE;
|
||||
|
||||
WINPR_ASSERT(path);
|
||||
if (path[1] == ':' || path[1] == '|')
|
||||
{
|
||||
if (((path[0] >= 'A') && (path[0] <= 'Z')) || ((path[0] >= 'a') && (path[0] <= 'z')))
|
||||
return TRUE;
|
||||
}
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
char* parse_uri_to_local_file(const char* uri, size_t uri_len)
|
||||
{
|
||||
// URI is specified by RFC 8089: https://datatracker.ietf.org/doc/html/rfc8089
|
||||
const char prefix[] = "file:";
|
||||
const char prefixTraditional[] = "file://";
|
||||
const char* localName = nullptr;
|
||||
size_t localLen = 0;
|
||||
char* buffer = nullptr;
|
||||
const size_t prefixLen = strnlen(prefix, sizeof(prefix));
|
||||
const size_t prefixTraditionalLen = strnlen(prefixTraditional, sizeof(prefixTraditional));
|
||||
|
||||
WINPR_ASSERT(uri || (uri_len == 0));
|
||||
|
||||
WLog_VRB(TAG, "processing URI: %.*s", WINPR_ASSERTING_INT_CAST(int, uri_len), uri);
|
||||
|
||||
if ((uri_len <= prefixLen) || strncmp(uri, prefix, prefixLen) != 0)
|
||||
{
|
||||
WLog_ERR(TAG, "non-'file:' URI schemes are not supported");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
do
|
||||
{
|
||||
/* https://datatracker.ietf.org/doc/html/rfc8089#appendix-F
|
||||
* - The minimal representation of a local file in a DOS- or Windows-
|
||||
* based environment with no authority field and an absolute path
|
||||
* that begins with a drive letter.
|
||||
*
|
||||
* "file:c:/path/to/file"
|
||||
*
|
||||
* - Regular DOS or Windows file URIs with vertical line characters in
|
||||
* the drive letter construct.
|
||||
*
|
||||
* "file:c|/path/to/file"
|
||||
*
|
||||
*/
|
||||
if (uri[prefixLen] != '/')
|
||||
{
|
||||
|
||||
if (is_dos_drive(&uri[prefixLen], uri_len - prefixLen))
|
||||
{
|
||||
// Dos and Windows file URI
|
||||
localName = &uri[prefixLen];
|
||||
localLen = uri_len - prefixLen;
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
WLog_ERR(TAG, "URI format are not supported: %s", uri);
|
||||
return nullptr;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* - The minimal representation of a local file with no authority field
|
||||
* and an absolute path that begins with a slash "/". For example:
|
||||
*
|
||||
* "file:/path/to/file"
|
||||
*
|
||||
*/
|
||||
else if ((uri_len > prefixLen + 1) && (uri[prefixLen + 1] != '/'))
|
||||
{
|
||||
if (is_dos_drive(&uri[prefixLen + 1], uri_len - prefixLen - 1))
|
||||
{
|
||||
// Dos and Windows file URI
|
||||
localName = (uri + prefixLen + 1);
|
||||
localLen = uri_len - prefixLen - 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
localName = &uri[prefixLen];
|
||||
localLen = uri_len - prefixLen;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* - A traditional file URI for a local file with an empty authority.
|
||||
*
|
||||
* "file:///path/to/file"
|
||||
*/
|
||||
if ((uri_len < prefixTraditionalLen) ||
|
||||
strncmp(uri, prefixTraditional, prefixTraditionalLen) != 0)
|
||||
{
|
||||
WLog_ERR(TAG, "non-'file:' URI schemes are not supported");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
localName = &uri[prefixTraditionalLen];
|
||||
localLen = uri_len - prefixTraditionalLen;
|
||||
|
||||
if (localLen < 1)
|
||||
{
|
||||
WLog_ERR(TAG, "empty 'file:' URI schemes are not supported");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
/*
|
||||
* "file:///c:/path/to/file"
|
||||
* "file:///c|/path/to/file"
|
||||
*/
|
||||
if (localName[0] != '/')
|
||||
{
|
||||
WLog_ERR(TAG, "URI format are not supported: %s", uri);
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
if (is_dos_drive(&localName[1], localLen - 1))
|
||||
{
|
||||
localName++;
|
||||
localLen--;
|
||||
}
|
||||
|
||||
} while (0);
|
||||
|
||||
buffer = winpr_str_url_decode(localName, localLen);
|
||||
if (buffer)
|
||||
{
|
||||
if (buffer[1] == '|' &&
|
||||
((buffer[0] >= 'A' && buffer[0] <= 'Z') || (buffer[0] >= 'a' && buffer[0] <= 'z')))
|
||||
buffer[1] = ':';
|
||||
return buffer;
|
||||
}
|
||||
|
||||
return nullptr;
|
||||
}
|
||||
Reference in New Issue
Block a user