ISteamUserAuth Interface (Steamworks Documentation)

Steamworks Documentation

ISteamUserAuth Interface

Steamworks Documentation > Steamworks Web API Reference > ISteamUserAuth Interface

Used to access information about users.

For more info on how to use the Steamworks Web API please see the Web API Overview.

AuthenticateUser

POST https://partner.steam-api.com/ISteamUserAuth/AuthenticateUser/v1/

Name	Type	Required	Description
steamid	uint64	✔	Should be the users steamid, unencrypted.
sessionkey	rawbinary	✔	Should be a 32 byte random blob of data, which is then encrypted with RSA using the Steam system's public key. Randomness is important here for security.
encrypted_loginkey	rawbinary	✔	Should be the users hashed loginkey, AES encrypted with the sessionkey.

AuthenticateUserTicket

GET https://partner.steam-api.com/ISteamUserAuth/AuthenticateUserTicket/v1/

Name	Type	Required	Description
key	string	✔	Steamworks Web API publisher authentication key
appid	uint32	✔	appid of game
ticket	string	✔	Convert the binary ticket data from GetAuthSessionTicket into a hexadecimal string and pass that string in as this parameter.

Returns: The user's 64-bit SteamID if the user's ticket is valid

NOTE: This call requires a publisher API key to use this method. As such this API MUST be called from a secure server, and can never be used directly by clients!

AuthenticateUserTIcket is also available for games servers via the https://api.steampowered.com/ domain using a Web API user authentication key. These requests are rate limited.