docs: document windows asar integrity

docs/tutorial/asar-integrity.md

@@ -7,19 +7,23 @@ hide_title: false
 
 ## Platform Support
 
-Currently ASAR integrity checking is only supported on macOS.
+Currently ASAR integrity checking is supported on:
+* macOS as of Electron `>=16.0.0`
+* Windows as of Electron `>=30.0.0`
 
 ## Requirements
 
 ### Electron Forge / Electron Packager
 
-If you are using `>= @electron/packager`, `>= [email protected]` or `>= @electron-forge/[email protected]` then all these requirements are met for you automatically and you can skip to [Toggling the Fuse](#toggling-the-fuse).
+If you are using `>= [email protected]` or `>= @electron-forge/[email protected]` then all these requirements are met for you automatically and you can skip to [Toggling the Fuse](#toggling-the-fuse).
 
 ### Other build systems
 
 In order to enable ASAR integrity checking you need to ensure that your `app.asar` file was generated by a version of the `asar` npm package that supports asar integrity.  Support was introduced in version `3.1.0`.
 
-Your must then populate a valid `ElectronAsarIntegrity` dictionary block in your packaged apps `Info.plist`.  An example is included below.
+### macOS
+
+When packaging for macOS you must populate a valid `ElectronAsarIntegrity` dictionary block in your packaged apps `Info.plist`.  An example is included below.
 
 ```plist
 <key>ElectronAsarIntegrity</key>
@@ -36,6 +40,19 @@ Your must then populate a valid `ElectronAsarIntegrity` dictionary block in your
 
 Valid `algorithm` values are currently `SHA256` only.  The `hash` is a hash of the ASAR header using the given algorithm.  The `asar` package exposes a `getRawHeader` method whose result can then be hashed to generate this value.
 
+### Windows
+
+When packaging for Windows you must populate a valid resource entry of type `Integrity` and name `ElectronAsar`. The value of this resource should be a JSON encoded dictionary in the form included below:
+
+```json
+{
+  "resources/app.asar": {
+    "algorithm": "SHA256",
+    "hash": "9d1f61ea03c4bb62b4416387a521101b81151da0cfbe18c9f8c8b818c5cebfac"
+  }
+}
+```
+
 ## Toggling the Fuse
 
 ASAR integrity checking is currently disabled by default and can be enabled by toggling a fuse. See [Electron Fuses](fuses.md) for more information on what Electron Fuses are and how they work.  When enabling this fuse you typically also want to enable the `onlyLoadAppFromAsar` fuse otherwise the validity checking can be bypassed via the Electron app code search path.