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TheRealAyCe / ubisoftconnect-win7fix

This is a proxy application to fix Ubisoft's channel-service not supporting any cipher suites for Windows 7, so that chat, groups and multiplayer invites work again.
MIT License
10 stars 0 forks source link
chat csharp groups invite java multiplayer tls tls12 ubisoft-connect uplay windows-7

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ubisoftconnect-win7fix

A proxy application to fix Ubisoft's channel-service not supporting any cipher suites for Windows 7, so that chat and multiplayer in Ubisoft Connect works again. Without it, Ubisoft Connect/Uplay may, on Windows 7, not show any chats, you cannot create groups, you cannot invite friends, and so on.

Use at your own risk, of course, as always.

>> Download <<

You need Java 8 installed for this.

Installation

  1. Make sure Java 8 is installed.
  2. Extract the ZIP in some directory. You should have ubisoftconnect-win7fix.exe and a folder Webserver.

Usage

  1. Before starting Ubisoft Connect, run ubisoftconnect-win7fix.exe from the extracted folder. It needs admin permissions.
  2. Allow the root certificate to be installed. It will be uninstalled (another prompt) when you close the app again.
  3. Wait for the app to show "Ready!". (max a few seconds)
  4. Start Ubisoft Connect.
  5. Keep the app window open until you're done using Ubisoft Connect.

It will setup everything automatically and clean up after itself once you close it. It will ask for admin permissions due to having to change the hosts file and possibly because it's installing (and later removing again) a root certificate for your current Windows user.

The problem

Ubisoft Connect loses chat and multiplayer party invite functionality under Windows 7, because the backend service that the application is trying to connect with does not support the HTTPS functionality shipped in Windows 7. The launcher_log.txt will contain lines with Http status code is none for url https://channel-service.upc.ubi.com/.... Using Internet Explorer, which uses the same API to access HTTPS functionality as Ubisoft Connect, it is not possible to open https://channel-service.upc.ubi.com/.

And the reason why the Ubisoft service does not support Windows 7, is due to only allowing a small amount of cipher suites, out of which Windows 7 supports none. From https://www.ssllabs.com/ssltest/analyze.html?d=channel-service.upc.ubi.com&s=54.147.167.217:

TLS 1.2 (suites in server-preferred order):

TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f) ECDH x25519 (eq. 3072 bits RSA) FS 128 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030) ECDH x25519 (eq. 3072 bits RSA) FS 256 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca8) ECDH x25519 (eq. 3072 bits RSA) FS 256

List of supported cipher suites in Windows 7: https://docs.microsoft.com/en-us/windows/win32/secauthn/tls-cipher-suites-in-windows-7

A cipher suite determines how data is encrypted. So even though configuring TLS 1.2 may be a challenge of its own (it's actually pretty simple) merely enabling TLS 1.2 support on Windows 7 does NOT solve the problem, contrary to what the Ubisoft support may or may not have claimed. TLS 1.2 is working correctly, but the way traffic gets encrypted by the server is not understood by Windows 7.

The solution

The proper solution would be for Ubisoft to allow at least one cipher suite that is still supported in Windows 7 for communication with their server. Windows 7 is still officially claimed to be supported, so in my opinion there is no reason why Ubisoft should drop support in this way.

The workaround

My workaround "solution", is to spoof their endpoint server, and redirect the traffic to their server using an implementation that is independent of the operating system's HTTPS cipher suites.

This is what I did/the ubisoftconnect-win7fix does:

(These are NOT instructions for running the fix. This is only relevant for you if you want to make your own fix.)

  1. Create a self-signed certificate for the hostname channel-service.upc.ubi.com. This is needed so that we can pretend to be the Ubisoft endpoint that causes problems.
  2. Install it as a root certificate on the machine using Ubisoft Connect. This is needed so that Ubisoft Connect will accept our proxy server as the real deal.
  3. Create a webserver app with ASP.NET Core, using the self-signed root certificate, to act as our proxy server. This app will receive HTTPS requests from Ubisoft Connect, negotiating a cipher suite that is supported in Windows 7, and then pipe the request to the actual Ubisoft endpoint.
  4. The actual Ubisoft endpoint can be contacted either by another machine in the network running Windows 10 (so the webserver app would run on that and directly contact the Ubisoft endpoint, giving back the actual HTTP response), or by using another app written in a separate framework, like Java, which does not use the operating system's libraries for HTTPS communication.
  5. Adapt the hosts file, adding 127.0.0.1 channel-service.upc.ubi.com, so that any requests to the Ubisoft endpoint are redirected to our webserver app instead. If we use a Java application running on the same machine, this must be the localhost address, if you use another machine in your network it must be that machine's network IP address.

You can test if you set up everything correctly by using Internet Explorer to access the URL. It will say "404" when it can successfully connect. Otherwise it will warn about TLS 1.2 not being configured properly.

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