Runtime Error on handleLogOnResponse

[berkanaslan]

The code is throwing panic with a "runtime error: invalid memory address or nil pointer dereference" during the execution of the Connect method. The panic is occurring in the Auth module, more precisely in the handleLogOnResponse function.

Steps to Reproduce:
Call the Connect method with valid username, password, and twoFactorSecret parameters.

func (s *GameCoordinatorService) Connect(username, password, twoFactorSecret string) {
	developerLoginInformation := new(steam.LogOnDetails)
	developerLoginInformation.Username = username
	developerLoginInformation.Password = password

	totpInstance := totp.NewTotp(twoFactorSecret)
	twoFactorCode, err := totpInstance.GenerateCode()

	if err != nil {
		log.Println("Error generating 2FA code: ", err)
	}

	developerLoginInformation.TwoFactorCode = twoFactorCode
	developerLoginInformation.ShouldRememberPassword = true

	client := steam.NewClient()

	if _, connectErr := client.Connect(); connectErr != nil {
		log.Panic(connectErr)
	}

	var connected sync.WaitGroup
	connected.Add(1)

	go func() {
		for event := range client.Events() {
			switch e := event.(type) {
			case *steam.ConnectedEvent:
				log.Println("Connected to steam. logging on...")
				client.Auth.LogOn(developerLoginInformation)
			case *steam.LogOnDetails:
				log.Println("Logging on...")
			case *steam.LoggedOnEvent:
				log.Println("Logged on successfully.")
				s.client = client
				client.Social.SetPersonaState(steamlang.EPersonaState_Invisible)
				s.connectToGameCoordinator()
				connected.Done()
			case steam.DisconnectedEvent:
				log.Println("Disconnected from Steam.")
			case steam.FatalErrorEvent:
				log.Fatal(e)
			case steam.LogOnFailedEvent:
				log.Println("Log on failed: ", e.Result)
			default:
				log.Printf("%T: %v\n", e, e)
			}
		}
	}()

	connected.Wait()
}

Error:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x8 pc=0x1046aa6b0]

goroutine 23 [running]:
github.com/Philipp15b/go-steam/v3.(*Auth).handleLogOnResponse(0x1400019bce0, 0x140004b15c0)
        /Users/berkan/go/pkg/mod/github.com/!philipp15b/go-steam/v3@v3.0.0/auth.go:113 +0xe0
github.com/Philipp15b/go-steam/v3.(*Auth).HandlePacket(0x70?, 0x14000180000?)
        /Users/berkan/go/pkg/mod/github.com/!philipp15b/go-steam/v3@v3.0.0/auth.go:87 +0x50
github.com/Philipp15b/go-steam/v3.(*Client).handlePacket(0x140003f6000, 0x140004b15c0)
        /Users/berkan/go/pkg/mod/github.com/!philipp15b/go-steam/v3@v3.0.0/client.go:300 +0x13c
github.com/Philipp15b/go-steam/v3.(*Client).handleMulti(0x140003f6000, 0x140004b11a0)
        /Users/berkan/go/pkg/mod/github.com/!philipp15b/go-steam/v3@v3.0.0/client.go:372 +0x3d8
github.com/Philipp15b/go-steam/v3.(*Client).handlePacket(0x140003f6000, 0x140004b11a0)
        /Users/berkan/go/pkg/mod/github.com/!philipp15b/go-steam/v3@v3.0.0/client.go:292 +0x58
github.com/Philipp15b/go-steam/v3.(*Client).readLoop(0x140003f6000)
        /Users/berkan/go/pkg/mod/github.com/!philipp15b/go-steam/v3@v3.0.0/client.go:234 +0x2c
created by github.com/Philipp15b/go-steam/v3.(*Client).ConnectToBind in goroutine 1
        /Users/berkan/go/pkg/mod/github.com/!philipp15b/go-steam/v3@v3.0.0/client.go:178 +0x184
exit status 2

go 1.21
macOS 14.2.1

[Andrew-Savin-msk]

If an arror comes after disconnect event you must recreate the client

[petar-yotsev]

I also have this problem with just the example code. I found a quick fix, you can just comment out this line in auth.go:
a.client.Web.webLoginKey = *body.WebapiAuthenticateUserNonce
There are checks for webLoginKey and WebapiAuthenticateUserNonce in case it's empty but not before this assignment. I haven't tested it further as I'm just getting into this library but I might do a pull request with a fix at a later point in time.