Bugfix: Limit Basic Commands to Authenticated Users

[lmaas]

This PR addresses a critical bug related to permissions checking during the processing of basic commands, where some RESP commands could be executed by unauthenticated users. Unauthenticated users should only be allowed to execute the AUTH command.

Bug Description

Steps to Reproduce

Start Garnet with password authentication enabled:

dotnet run -c Release -f net8.0 -- --auth password --password test

Connect to Garnet without authenticating and issue a common command other than AUTH (e.g. PING, GET or SET):

> PING
PONG 
> AUTH test
OK
> PING
PONG

Expected Result

> PING
(error) NOAUTH Authentication required.
> AUTH test
OK
> PING
PONG

Actual Result

Commands that are part of the basic command group are executed even when the client is not authenticated.

Changes

To fix this issue, the following changes have been made:

• Added authentication check to ProcessBasicCommands()