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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
#include "precomp.h"
static HRESULT GetActiveSessionUserToken(
__out HANDLE *phToken
);
/********************************************************************
ProcExecuteAsInteractiveUser() - runs process as currently logged in
user.
*******************************************************************/
extern "C" HRESULT DAPI ProcExecuteAsInteractiveUser(
__in_z LPCWSTR wzExecutablePath,
__in_z LPCWSTR wzCommandLine,
__out HANDLE *phProcess
)
{
HRESULT hr = S_OK;
HANDLE hToken = NULL;
LPVOID pEnvironment = NULL;
LPWSTR sczFullCommandLine = NULL;
STARTUPINFOW si = { };
PROCESS_INFORMATION pi = { };
hr = GetActiveSessionUserToken(&hToken);
ExitOnFailure(hr, "Failed to get active session user token.");
if (!::CreateEnvironmentBlock(&pEnvironment, hToken, FALSE))
{
ExitWithLastError(hr, "Failed to create environment block for UI process.");
}
hr = StrAllocFormatted(&sczFullCommandLine, L"\"%ls\" %ls", wzExecutablePath, wzCommandLine);
ExitOnFailure(hr, "Failed to allocate full command-line.");
si.cb = sizeof(si);
if (!::CreateProcessAsUserW(hToken, wzExecutablePath, sczFullCommandLine, NULL, NULL, FALSE, CREATE_UNICODE_ENVIRONMENT, pEnvironment, NULL, &si, &pi))
{
ExitWithLastError(hr, "Failed to create UI process: %ls", sczFullCommandLine);
}
*phProcess = pi.hProcess;
pi.hProcess = NULL;
LExit:
ReleaseHandle(pi.hThread);
ReleaseHandle(pi.hProcess);
ReleaseStr(sczFullCommandLine);
if (pEnvironment)
{
::DestroyEnvironmentBlock(pEnvironment);
}
ReleaseHandle(hToken);
return hr;
}
static HRESULT GetActiveSessionUserToken(
__out HANDLE *phToken
)
{
HRESULT hr = S_OK;
PWTS_SESSION_INFO pSessionInfo = NULL;
DWORD cSessions = 0;
DWORD dwSessionId = 0;
BOOL fSessionFound = FALSE;
HANDLE hToken = NULL;
// Loop through the sessions looking for the active one.
if (!::WTSEnumerateSessions(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pSessionInfo, &cSessions))
{
ExitWithLastError(hr, "Failed to enumerate sessions.");
}
for (DWORD i = 0; i < cSessions; ++i)
{
if (WTSActive == pSessionInfo[i].State)
{
dwSessionId = pSessionInfo[i].SessionId;
fSessionFound = TRUE;
break;
}
}
if (!fSessionFound)
{
ExitFunction1(hr = E_NOTFOUND);
}
// Get the user token from the active session.
if (!::WTSQueryUserToken(dwSessionId, &hToken))
{
ExitWithLastError(hr, "Failed to get active session user token.");
}
*phToken = hToken;
hToken = NULL;
LExit:
ReleaseHandle(hToken);
if (pSessionInfo)
{
::WTSFreeMemory(pSessionInfo);
}
return hr;
}
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