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Steamworks Documentation
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://api.steampowered.com/ISteamUserAuth/AuthenticateUser/v1/
NameTypeRequiredDescription
steamiduint64Should be the users steamid, unencrypted.
sessionkeyrawbinaryShould 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_loginkeyrawbinaryShould be the users hashed loginkey, AES encrypted with the sessionkey.

AuthenticateUserTicket

GET https://api.steampowered.com/ISteamUserAuth/AuthenticateUserTicket/v1/
NameTypeRequiredDescription
keystringSteamworks Web API user authentication key.
appiduint32appid of game
ticketstringTicket from GetAuthSessionTicket.