116 lines
4.0 KiB
C
116 lines
4.0 KiB
C
/*
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Copyright 1991-2016 Amebis
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This file is part of atlex.
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Setup is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Setup is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Setup. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <Security.h>
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///
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/// \defgroup ATLSecurityAPI Security API
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/// Integrates ATL classes with Microsoft Security API
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///
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/// @{
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///
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/// Retrieves the name of the user or other security principal associated with the calling thread and stores it in a ATL::CAtlStringA string.
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///
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/// \sa [GetUserNameEx function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx)
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///
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BOOLEAN GetUserNameExA(_In_ EXTENDED_NAME_FORMAT NameFormat, _Out_ ATL::CAtlStringA &sName)
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{
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CHAR szStackBuffer[ATL_STACK_BUFFER_BYTES/sizeof(CHAR)];
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ULONG ulSize = _countof(szStackBuffer);
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// Try with stack buffer first.
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if (::GetUserNameExA(NameFormat, szStackBuffer, &ulSize)) {
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// Allocate buffer on heap, copy from stack buffer, and zero terminate.
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LPSTR szBuffer = sName.GetBuffer(ulSize + 1);
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if (!szBuffer) {
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SetLastError(ERROR_OUTOFMEMORY);
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return FALSE;
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}
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memcpy(szBuffer, szStackBuffer, ulSize); szBuffer[ulSize] = 0;
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sName.ReleaseBuffer(ulSize + 1);
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return TRUE;
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} else {
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if (::GetLastError() == ERROR_MORE_DATA) {
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// Allocate buffer on heap and retry.
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LPSTR szBuffer = sName.GetBuffer(ulSize - 1);
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if (!szBuffer) {
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SetLastError(ERROR_OUTOFMEMORY);
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return FALSE;
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}
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if (::GetUserNameExA(NameFormat, szBuffer, &ulSize)) {
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sName.ReleaseBuffer(ulSize);
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return TRUE;
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} else {
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sName.ReleaseBuffer(0);
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return FALSE;
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}
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} else {
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// Return error.
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return FALSE;
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}
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}
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}
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///
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/// Retrieves the name of the user or other security principal associated with the calling thread and stores it in a ATL::CAtlStringW string.
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///
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/// \sa [GetUserNameEx function](https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx)
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///
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BOOLEAN GetUserNameExW(_In_ EXTENDED_NAME_FORMAT NameFormat, _Out_ ATL::CAtlStringW &sName)
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{
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WCHAR szStackBuffer[ATL_STACK_BUFFER_BYTES/sizeof(WCHAR)];
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ULONG ulSize = _countof(szStackBuffer);
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// Try with stack buffer first.
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if (::GetUserNameExW(NameFormat, szStackBuffer, &ulSize)) {
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// Allocate buffer on heap, copy from stack buffer, and zero terminate.
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LPWSTR szBuffer = sName.GetBuffer(ulSize + 1);
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if (!szBuffer) {
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SetLastError(ERROR_OUTOFMEMORY);
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return FALSE;
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}
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wmemcpy(szBuffer, szStackBuffer, ulSize); szBuffer[ulSize] = 0;
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sName.ReleaseBuffer(ulSize + 1);
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return TRUE;
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} else {
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if (::GetLastError() == ERROR_MORE_DATA) {
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// Allocate buffer on heap and retry.
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LPWSTR szBuffer = sName.GetBuffer(ulSize - 1);
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if (!szBuffer) {
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SetLastError(ERROR_OUTOFMEMORY);
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return FALSE;
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}
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if (::GetUserNameExW(NameFormat, szBuffer, &ulSize)) {
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sName.ReleaseBuffer(ulSize);
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return TRUE;
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} else {
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sName.ReleaseBuffer(0);
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return FALSE;
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}
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} else {
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// Return error.
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return FALSE;
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}
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}
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}
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/// @}
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