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-rw-r--r--toolkit/mozapps/notificationserver/NotificationComServer.cpp132
1 files changed, 132 insertions, 0 deletions
diff --git a/toolkit/mozapps/notificationserver/NotificationComServer.cpp b/toolkit/mozapps/notificationserver/NotificationComServer.cpp
new file mode 100644
index 0000000000..184b55be44
--- /dev/null
+++ b/toolkit/mozapps/notificationserver/NotificationComServer.cpp
@@ -0,0 +1,132 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <filesystem>
+#include <string>
+
+#include "mozilla/WinHeaderOnlyUtils.h"
+
+#include "NotificationFactory.h"
+
+using namespace std::filesystem;
+
+static path processDllPath = {};
+
+// Populate the path to this DLL.
+bool PopulateDllPath(HINSTANCE dllInstance) {
+ std::vector<wchar_t> path(MAX_PATH, 0);
+ DWORD charsWritten =
+ GetModuleFileNameW(dllInstance, path.data(), path.size());
+
+ // GetModuleFileNameW returns the count of characters written including null
+ // when truncated, excluding null otherwise. Therefore the count will always
+ // be less than the buffer size when not truncated.
+ while (charsWritten == path.size()) {
+ path.resize(path.size() * 2, 0);
+ charsWritten = GetModuleFileNameW(dllInstance, path.data(), path.size());
+ }
+
+ if (charsWritten == 0) {
+ return false;
+ }
+
+ processDllPath = path.data();
+ return true;
+}
+
+// Our activator's CLSID is generated once either during install or at runtime
+// by the application generating the notification so that notifications work
+// with parallel installs and portable/development builds. When a COM object is
+// requested we verify the CLSID's InprocServer registry entry matches this
+// DLL's path.
+bool CheckRuntimeClsid(REFCLSID rclsid) {
+ // MSIX Notification COM Server registration is isolated to the package and is
+ // identical across installs/channels.
+ if (mozilla::HasPackageIdentity()) {
+ // Keep synchronized with `python\mozbuild\mozbuild\repackaging\msix.py`.
+ constexpr CLSID MOZ_INOTIFICATIONACTIVATION_CLSID = {
+ 0x916f9b5d,
+ 0xb5b2,
+ 0x4d36,
+ {0xb0, 0x47, 0x03, 0xc7, 0xa5, 0x2f, 0x81, 0xc8}};
+
+ return IsEqualCLSID(rclsid, MOZ_INOTIFICATIONACTIVATION_CLSID);
+ }
+
+ std::wstring clsid_str;
+ {
+ wchar_t* raw_clsid_str;
+ if (SUCCEEDED(StringFromCLSID(rclsid, &raw_clsid_str))) {
+ clsid_str += raw_clsid_str;
+ CoTaskMemFree(raw_clsid_str);
+ } else {
+ return false;
+ }
+ }
+
+ std::wstring key = L"CLSID\\";
+ key += clsid_str;
+ key += L"\\InprocServer32";
+
+ DWORD bufferLen = 0;
+ LSTATUS status = RegGetValueW(HKEY_CLASSES_ROOT, key.c_str(), L"",
+ RRF_RT_REG_SZ, nullptr, nullptr, &bufferLen);
+ if (status != ERROR_SUCCESS) {
+ return false;
+ }
+
+ std::vector<wchar_t> clsidDllPathBuffer(bufferLen / sizeof(wchar_t));
+ // Sanity assignment in case the buffer length found was not an integer
+ // multiple of `sizeof(wchar_t)`.
+ bufferLen = clsidDllPathBuffer.size() * sizeof(wchar_t);
+
+ status = RegGetValueW(HKEY_CLASSES_ROOT, key.c_str(), L"", RRF_RT_REG_SZ,
+ nullptr, clsidDllPathBuffer.data(), &bufferLen);
+ if (status != ERROR_SUCCESS) {
+ return false;
+ }
+
+ path clsidDllPath = clsidDllPathBuffer.data();
+ return equivalent(processDllPath, clsidDllPath);
+}
+
+extern "C" {
+HRESULT STDMETHODCALLTYPE DllGetClassObject(REFCLSID rclsid, REFIID riid,
+ LPVOID* ppv) {
+ if (!ppv) {
+ return E_INVALIDARG;
+ }
+ *ppv = nullptr;
+
+ if (!CheckRuntimeClsid(rclsid)) {
+ return CLASS_E_CLASSNOTAVAILABLE;
+ }
+
+ using namespace Microsoft::WRL;
+ ComPtr<NotificationFactory> factory =
+ Make<NotificationFactory, const GUID&, const path&>(
+ rclsid, processDllPath.parent_path());
+
+ switch (factory->QueryInterface(riid, ppv)) {
+ case S_OK:
+ return S_OK;
+ case E_NOINTERFACE:
+ return CLASS_E_CLASSNOTAVAILABLE;
+ default:
+ return E_UNEXPECTED;
+ }
+}
+
+BOOL STDMETHODCALLTYPE DllMain(HINSTANCE hinstDLL, DWORD fdwReason,
+ LPVOID lpReserved) {
+ if (fdwReason == DLL_PROCESS_ATTACH) {
+ if (!PopulateDllPath(hinstDLL)) {
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+}