Auth+Ticket+Ticket Validation Example?

EDIT

Skip to bottom – in between is progression.

Original Issue

I could only find Auth.GetAuthSessionTicket that returns a byte[] via _ticket.data:

What do I do from there? In Steamworks.net, it’s stupidly complicated to convert it, then you need to send it away for a callback:

ticketBlob = new byte[1024];

// Retrieve ticket; hTicket should be a field in the class so you can use it to cancel the ticket later
// When you pass an object, the object can be modified by the callee. This function modifies the byte array you've passed to it.
hTicket = SteamUser.GetAuthSessionTicket(ticketBlob, ticketBlob.Length, out ticketSize);

// Resize the buffer to actual length
Array.Resize(ref ticketBlob, (int)ticketSize);

// Convert bytes to string
StringBuilder sb = new StringBuilder();
foreach (byte b in ticketBlob)
{
	sb.AppendFormat("{0:x2}", b);
}
hexTicket = sb.ToString(); // Final result: Then you send it off to Steam to get verified. Send this hexTicket to your BaaS or oAuth2.

// Wait for OnGetAuthSessionTicketResponse to confirm the ticket is valid =>

private void OnGetAuthSessionTicketResponse(GetAuthSessionTicketResponse_t callback)
{
    // Confirm validity of ticket here
}

How do I do the Facepunch equiv of this? Rather:

1. How do you convert an Auth.Ticket to string (the final form)?
2. How do I validate the ticket (OnGetAuthSessionTicketResponse() equiv.)?

There used to be an example link via this issue ( https://github.com/Facepunch/Facepunch.Steamworks/issues/52 ). However, it’s now 404.

[igniuss]

If you want to verify the session ticket in a single player experience you’d need to post it to the AuthenticateUserTicket web-api of steamworks, not Server.Instance

The other method would be having a dedicated server that initializes a Server instance example: var server = new Facepunch.Steamworks.Server(252490, options); (see the Facepunch.Test assembly for a big example)

After which you can use the StartSession part on the server, and send a callback to the client if it was correct or not.

I haven’t played around with it yet but,

byte[] ticketBlob = authTicket.Data;
string s = string.Concat(ticketBlob.Select(b => b.ToString("X2")));

seems correct, should just post it to the webapi (see the Steam WebAPI doc for more info )

You can also See this Test-code to see it’s working only difference is you’re testing it locally instead of sending over the binary to the server who then checks it.

[dylanh724]

Alas, it seems that 50%+ of the time, users are getting an "Invalid Ticket:

{ \"response\" : { \"error\" : { \"errorcode\" : 101 , \"errordesc\" : \"Invalid ticket\"}}}

Anyone know what would cause this?

Related: https://github.com/Facepunch/Facepunch.Steamworks/issues/217