auth

type Authenticator interface {
	// PublicKey returns the public key encoded in ASN.1 DER form.
	PublicKey() []byte
	// Verify verifies the "verify token" sent by joining client.
	Verify(encryptedVerifyToken, actualVerifyToken []byte) (equal bool, err error)
	// DecryptSharedSecret Decrypt shared secret sent by client.
	DecryptSharedSecret(encrypted []byte) (decrypted []byte, err error)
	// GenerateServerID Generate server id to be used with AuthenticateJoin.
	GenerateServerID(decryptedSharedSecret []byte) (serverID string, err error)
	// AuthenticateJoin Authenticates a joining user. The ip is optional.
	AuthenticateJoin(ctx context.Context, serverID, username, ip string) (Response, error)
	// SetHasJoinedURLFn sets the HasJoinedURLFn.
	// If not set, DefaultHasJoinedURL is used.
	SetHasJoinedURLFn(fn HasJoinedURLFn)
}

type HasJoinedURLFn func(serverID, username, userIP string) string

type Options struct {
	// This setting allows to an authentication url other
	// than the official "hasJoined" Mojang API endpoint.
	// The returned url is used to authenticate a joining
	// online mode user.
	// If not set, DefaultHasJoinedURL is used.
	HasJoinedURLFn HasJoinedURLFn
	// The servers private key.
	// If none is set, a new one will be generated.
	PrivateKey *rsa.PrivateKey
	// PrivateKey is not set,
	// the bit size of a generated private key.
	// The default is DefaultPrivateKeyBits.
	PrivateKeyBits int
	// The http client to query the Mojang API.
	// If none is set, a new one is created.
	Client *http.Client
}

type Response interface {
	OnlineMode() bool // Whether the user is in online mode
	// GameProfile extracts the GameProfile from an authenticated client.
	// Returns nil, nil if OnlineMode is false.
	GameProfile() (*profile.GameProfile, error)
}