Protocols/MSNP/Scenarios/Mac

Protocol

From my testing, all the versions I tested (6.0.3, 7.0.2, 8.0.1) use TLSv1 to connect to the login servers, HOWEVER it just uses an old record layer. More information about this would be very appreciated.

• 6.x, 7.x: MSNP14, MSNP13
• 8.x (including beta): MSNP16, MSNP15, MSNP14, MSNP13

This is the only official Microsoft client that uses the TWN auth method after MSNP15 (SSO/RPS was introduced in MSNP15).

Logging

You can enable connection logging on M:M 7 and 8 by enabling it in Preferences (Cmd+,). The file location will be ~/Documents/Microsoft Messenger.log on M:M 7 and ~/Library/Logs/Microsoft Messenger.log on M:M 8.

Changing servers

To change the servers, you'll have to edit the binary data itself using an hex editor.

There's a configuration file (plist) located in ~/Library/Preferences/Microsoft/com.microsoft.Messenger.plist(6.x, 7.x) and ~/Library/Preferences/com.microsoft.Messenger.plist(8.x) that caches some server values (ABCH Server, NS Server, Gateway Server) that should also be changed if the app has been opened before.

CVR commands sent

M:M 8.0.1

CVR 2 0x0409 mac 10.13.6 i386 macmsgs 8.0.1 macmsgs me@andreadoria.cf

M:M 8.0.0 beta

CVR 2 0x0409 mac 10.13.6 i386 macmsgsbeta 8.0.0 macmsgsbeta me@andreadoria.cf

M:M 7.0.2

CVR 2 0x0409 mac 10.9.6 i386 macmsgs 7.0.2 macmsgs me@andreadoria.cf

M:M 6.0.3

CVR 2 0x0409 mac 10.9.6 i386 macmsgs 6.0.3 macmsgs me@andreadoria.cf

All of these requests were sent using macOS 10.13.6, but 6.x and 7.x seem to send the client operating system version as 10.9 (probably a cap?)

Odd quirks

Messenger:mac only reads the PassportURLs Header from the Passport Nexus if it ends with ConfigVersion=14. It uses TWN even on MSNP16, so it gets the ABCH token from the DALogin value from the PassportURLs header.