From 8810aa8908ed7887616d86dd5fb821fcfa92f444 Mon Sep 17 00:00:00 2001
From: Sean Hall <r.sean.hall@gmail.com>
Date: Fri, 3 Jun 2022 17:50:22 -0500
Subject: Update Burn algorithm for picking elevated temp path to use
 SystemTemp.

---
 src/libs/dutil/WixToolset.DUtil/procutil.cpp | 68 ++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

(limited to 'src/libs/dutil/WixToolset.DUtil/procutil.cpp')

diff --git a/src/libs/dutil/WixToolset.DUtil/procutil.cpp b/src/libs/dutil/WixToolset.DUtil/procutil.cpp
index a3131b7a..340a0cda 100644
--- a/src/libs/dutil/WixToolset.DUtil/procutil.cpp
+++ b/src/libs/dutil/WixToolset.DUtil/procutil.cpp
@@ -9,6 +9,7 @@
 #define ProcExitWithLastError(x, s, ...) ExitWithLastErrorSource(DUTIL_SOURCE_PROCUTIL, x, s, __VA_ARGS__)
 #define ProcExitOnFailure(x, s, ...) ExitOnFailureSource(DUTIL_SOURCE_PROCUTIL, x, s, __VA_ARGS__)
 #define ProcExitOnRootFailure(x, s, ...) ExitOnRootFailureSource(DUTIL_SOURCE_PROCUTIL, x, s, __VA_ARGS__)
+#define ProcExitWithRootFailure(x, e, s, ...) ExitWithRootFailureSource(DUTIL_SOURCE_PROCUTIL, x, e, s, __VA_ARGS__)
 #define ProcExitOnFailureDebugTrace(x, s, ...) ExitOnFailureDebugTraceSource(DUTIL_SOURCE_PROCUTIL, x, s, __VA_ARGS__)
 #define ProcExitOnNull(p, x, e, s, ...) ExitOnNullSource(DUTIL_SOURCE_PROCUTIL, p, x, e, s, __VA_ARGS__)
 #define ProcExitOnNullWithLastError(p, x, s, ...) ExitOnNullWithLastErrorSource(DUTIL_SOURCE_PROCUTIL, p, x, s, __VA_ARGS__)
@@ -75,6 +76,73 @@ LExit:
     return hr;
 }
 
+extern "C" HRESULT DAPI ProcSystem(
+    __in HANDLE hProcess,
+    __out BOOL* pfSystem
+    )
+{
+    HRESULT hr = S_OK;
+    TOKEN_USER* pTokenUser = NULL;
+
+    hr = ProcTokenUser(hProcess, &pTokenUser);
+    ProcExitOnFailure(hr, "Failed to get TokenUser from process token.");
+
+    *pfSystem = ::IsWellKnownSid(pTokenUser->User.Sid, WinLocalSystemSid);
+
+LExit:
+    ReleaseMem(pTokenUser);
+
+    return hr;
+}
+
+extern "C" HRESULT DAPI ProcTokenUser(
+    __in HANDLE hProcess,
+    __out TOKEN_USER** ppTokenUser
+    )
+{
+    HRESULT hr = S_OK;
+    DWORD er = ERROR_SUCCESS;
+    HANDLE hToken = NULL;
+    TOKEN_USER* pTokenUser = NULL;
+    DWORD cbToken = 0;
+
+    if (!::OpenProcessToken(hProcess, TOKEN_QUERY, &hToken))
+    {
+        ProcExitWithLastError(hr, "Failed to open process token.");
+    }
+
+    if (::GetTokenInformation(hToken, TokenUser, pTokenUser, 0, &cbToken))
+    {
+        er = ERROR_SUCCESS;
+    }
+    else
+    {
+        er = ::GetLastError();
+    }
+
+    if (er != ERROR_INSUFFICIENT_BUFFER)
+    {
+        ProcExitOnWin32Error(er, hr, "Failed to get user from process token size.");
+    }
+
+    pTokenUser = reinterpret_cast<TOKEN_USER*>(MemAlloc(cbToken, TRUE));
+    ProcExitOnNull(pTokenUser, hr, E_OUTOFMEMORY, "Failed to allocate token information.");
+
+    if (!::GetTokenInformation(hToken, TokenUser, pTokenUser, cbToken, &cbToken))
+    {
+        ProcExitWithLastError(hr, "Failed to get user from process token.");
+    }
+
+    *ppTokenUser = pTokenUser;
+    pTokenUser = NULL;
+
+LExit:
+    ReleaseMem(pTokenUser);
+    ReleaseHandle(hToken);
+
+    return hr;
+}
+
 extern "C" HRESULT DAPI ProcWow64(
     __in HANDLE hProcess,
     __out BOOL* pfWow64
-- 
cgit v1.2.3-55-g6feb