From 1cdee86d9b1f190d4720fda37951ce119b528f2b Mon Sep 17 00:00:00 2001
From: Lev Stipakov <lev@openvpn.net>
Date: Tue, 24 Jun 2025 12:50:07 +0200
Subject: [PATCH] msi: create event source for OpenVPNService

This enables OpenVPNService, running under limited virtual
service account, to log to event log.

GitHub: https://github.com/OpenVPN/openvpnserv2/pull/27

Signed-off-by: Lev Stipakov <lev@openvpn.net>
---
 windows-msi/msi.wxs                       |  3 +++
 windows-msi/script/RegisterEventSource.js | 11 +++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 windows-msi/script/RegisterEventSource.js

diff --git a/windows-msi/msi.wxs b/windows-msi/msi.wxs
index 3b6b367e..d892cee0 100644
--- a/windows-msi/msi.wxs
+++ b/windows-msi/msi.wxs
@@ -85,6 +85,7 @@
         <Binary Id="Service.js" SourceFile="script\Service.js"/>
         <Binary Id="PlapReg.js" SourceFile="script\PlapReg.js"/>
         <Binary Id="ACL.js" SourceFile="script\ACL.js"/>
+        <Binary Id="RegisterEventSource.js" SourceFile="script\RegisterEventSource.js"/>
 
         <CustomAction Id="GetInstallDirForPlap" BinaryKey="PlapReg.js" JScriptCall="GetInstallDir" />
         <CustomAction Id="UpdatePlapReg" BinaryKey="PlapReg.js" JScriptCall="UpdatePlapReg" Execute="deferred" Impersonate="no" />
@@ -95,6 +96,7 @@
         <CustomAction Id="GetInstallDirForACL" BinaryKey="ACL.js" JScriptCall="GetInstallDir" Return="check" />
         <CustomAction Id="SetACL" BinaryKey="ACL.js" JScriptCall="SetACL" Execute="deferred" Impersonate="no" Return="check" />
 
+        <CustomAction Id="RegisterEventSource" BinaryKey="RegisterEventSource.js" JScriptCall="RegisterEventSource" Execute="deferred" Impersonate="no" Return="check" />
         <!--
             Detect system information
         -->
@@ -110,6 +112,7 @@
             <Custom Action="UpdatePlapReg" After="InstallFiles"/>
             <Custom Action="GetInstallDirForACL" After="SetProductDirParam">NOT Installed</Custom>
             <Custom Action="SetACL" After="InstallFiles">NOT Installed</Custom>
+            <Custom Action="RegisterEventSource" After="InstallFiles">NOT Installed</Custom>
         </InstallExecuteSequence>
         <UI>
             <ProgressText Action="FindSystemInfo">Detecting system information</ProgressText>
diff --git a/windows-msi/script/RegisterEventSource.js b/windows-msi/script/RegisterEventSource.js
new file mode 100644
index 00000000..de827a44
--- /dev/null
+++ b/windows-msi/script/RegisterEventSource.js
@@ -0,0 +1,11 @@
+function RegisterEventSource() {
+    var shell = new ActiveXObject("WScript.Shell");
+    var source = "OpenVPNService";
+    var logName = "Application";
+
+    var command = 'powershell -ExecutionPolicy Bypass -Command "if (-not [System.Diagnostics.EventLog]::SourceExists(\'' +
+                source + '\')) {[System.Diagnostics.EventLog]::CreateEventSource(\'' +
+                source + '\', \'' + logName + '\')}"';
+
+    shell.Run(command, 0, true); // 0 = hidden, true = wait until complete
+}