From ff659159e041bf6c083e6b7fcb9b726065a9dd73 Mon Sep 17 00:00:00 2001
From: Rob Mensching <rob@firegiant.com>
Date: Mon, 3 May 2021 09:55:22 -0700
Subject: Move Util.wixext into ext

---
 src/ext/Util/be/detectsha2support.cpp | 58 +++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/ext/Util/be/detectsha2support.cpp

(limited to 'src/ext/Util/be/detectsha2support.cpp')

diff --git a/src/ext/Util/be/detectsha2support.cpp b/src/ext/Util/be/detectsha2support.cpp
new file mode 100644
index 00000000..90e349cd
--- /dev/null
+++ b/src/ext/Util/be/detectsha2support.cpp
@@ -0,0 +1,58 @@
+// 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"
+
+// https://gist.github.com/navossoc/7572c7d82243e9f818989e2765e7793a
+HRESULT DetectSHA2CodeSigning(
+    __out BOOL* pfSupported
+    )
+{
+    HRESULT hr = S_OK;
+    HMODULE hModule = NULL;
+    FARPROC pfn = NULL;
+    DWORD er = ERROR_SUCCESS;
+
+    hr = LoadSystemLibrary(L"wintrust.dll", &hModule);
+    ExitOnFailure(hr, "Failed to load wintrust.dll");
+
+    pfn = ::GetProcAddress(hModule, "CryptCATAdminAcquireContext2");
+    if (pfn)
+    {
+        *pfSupported = TRUE;
+        ExitFunction1(hr = S_OK);
+    }
+
+    er = ::GetLastError();
+    if (er == ERROR_PROC_NOT_FOUND)
+    {
+        *pfSupported = FALSE;
+        ExitFunction1(hr = S_OK);
+    }
+
+    hr = HRESULT_FROM_WIN32(er);
+    ExitOnFailure(hr, "Failed to probe for CryptCATAdminAcquireContext2 in wintrust.dll");
+
+LExit:
+    ::FreeLibrary(hModule);
+
+    return hr;
+}
+
+HRESULT UtilPerformDetectSHA2CodeSigning(
+    __in LPCWSTR wzVariable,
+    __in UTIL_SEARCH* /*pSearch*/,
+    __in IBundleExtensionEngine* pEngine
+    )
+{
+    HRESULT hr = S_OK;
+    BOOL fSupported = FALSE;
+
+    hr = DetectSHA2CodeSigning(&fSupported);
+    ExitOnFailure(hr, "DetectSHA2CodeSigning failed.");
+
+    hr = pEngine->SetVariableNumeric(wzVariable, fSupported ? 1 : 0);
+    ExitOnFailure(hr, "Failed to set variable '%ls'", wzVariable);
+
+LExit:
+    return hr;
+}
-- 
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