Jakub Zych
cc3636cea9
The revoke now reads the device's jti with UPDATE ... RETURNING under the row lock, and the refresh's hand-over (classes.FollowDeviceJTI) reports a session revoked meanwhile, so the refresh answers the blacklisted-token 401 without a token. A hand-over error fails the refresh closed instead of leaving the session on a stale jti.
533 lines
18 KiB
Go
533 lines
18 KiB
Go
package controllers
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import (
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"context"
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"errors"
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"net/http"
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"strconv"
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"strings"
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"time"
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"unicode/utf8"
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"git.golem15.com/golem15/sm-user-plugin/classes"
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"git.golem15.com/golem15/sm-user-plugin/models"
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"git.golem15.com/golem15/summercms/modules/backpack"
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"git.golem15.com/golem15/summercms/modules/bouncer"
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"git.golem15.com/golem15/summercms/modules/lagoon"
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"git.golem15.com/golem15/summercms/modules/surf"
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"git.golem15.com/golem15/summercms/modules/wire"
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"github.com/jackc/pgx/v5/pgconn"
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"gorm.io/gorm"
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)
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// deviceTable is the device authorization session table.
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const deviceTable = "golem15_user_device_auth_sessions"
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// deviceInsertAttempts bounds the retries of an initiate whose fresh short
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// code (or token) collided with a stored one.
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const deviceInsertAttempts = 5
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// deviceCleanupBatch bounds the stale sessions one initiate deletes.
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const deviceCleanupBatch = 500
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// writeDeviceUnauthorized is the PHP device controller's 401 body, which
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// differs from the session routes' {"error":true,"message":"Unauthorized"}.
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func writeDeviceUnauthorized(w http.ResponseWriter) {
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writeJSON(w, http.StatusUnauthorized, map[string]any{"error": "Unauthorized"})
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}
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// deviceCaller resolves the signed-in user of a device route that needs one
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// (authorize, list, revoke). It reads and checks the session token as the
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// plugin's jwt guard does (bearer header, then the session cookies; the
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// blacklist and tokens_valid_after apply) and also returns the token's jti.
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// Anything else answers PHP's 401 {"error":"Unauthorized"}.
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func deviceCaller(w http.ResponseWriter, r *http.Request, app *backpack.App, gdb *gorm.DB, secret string) (*models.User, string, bool) {
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principal, err := sessionGuard(app, secret).Authenticate(r)
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if err != nil || principal == nil || principal.ID == 0 {
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writeDeviceUnauthorized(w)
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return nil, "", false
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}
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var user models.User
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if err := gdb.WithContext(r.Context()).Where("id = ?", principal.ID).Take(&user).Error; err != nil {
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writeDeviceUnauthorized(w)
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return nil, "", false
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}
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jti := ""
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if raw := classes.SessionToken(r); raw != "" {
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if _, _, _, id, err := bouncer.VerifyClaims(raw, secret); err == nil {
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jti = id
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}
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}
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return &user, jti, true
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}
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// deviceClientIP is the client address device rows record: surf.ClientIP
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// with http.trusted_proxies, as /login and /register use.
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func deviceClientIP(app *backpack.App, r *http.Request) string {
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return surf.ClientIP(r, surf.TrustedProxies(appConfig(app)))
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}
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// DeviceInitiate is POST /devices/initiate, called without a session by the
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// device that wants to sign in. It stores a pending session (the SHA-256 of
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// a 64-character token, a short code XXXX-XXXX, expires_at now plus
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// golem15.user.device_auth.ttl_minutes, the device's address, user agent and
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// optional device_name of at most 255 characters) and answers
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// {"success":true,"data":{"token","short_code","auth_url","expires_at"}}.
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// Each call first deletes at most 500 pending or expired sessions that
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// expired more than an hour ago.
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func DeviceInitiate(app *backpack.App) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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gdb, _, ok := sessionDeps(w, app)
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if !ok {
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return
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}
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fields, err := readFields(r)
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if err != nil {
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writeOpaque500(w)
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return
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}
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name := strField(fields, "device_name")
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if utf8.RuneCountInString(name) > 255 {
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writeValidation(w, map[string][]string{"device_name": {"The device name may not be greater than 255 characters."}})
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return
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}
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ctx := r.Context()
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// Stale sessions go in bounded batches, so the unauthenticated route
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// cannot grow the table without limit (a failure is only logged).
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if err := gdb.WithContext(ctx).Exec(`DELETE FROM `+deviceTable+` WHERE id IN (
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SELECT id FROM `+deviceTable+`
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WHERE status IN ('pending', 'expired') AND expires_at < NOW() - INTERVAL '1 hour'
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LIMIT ?)`, deviceCleanupBatch).Error; err != nil {
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pluginLog.Warn("golem15.user: device session cleanup", "err", err)
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}
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ip := deviceClientIP(app, r)
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ua := r.UserAgent()
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expires := time.Now().Add(classes.DeviceAuthTTL(app)).Truncate(time.Second)
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var (
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token string
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row models.DeviceAuthSession
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)
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for attempt := 0; ; attempt++ {
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token, err = classes.NewDeviceToken()
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if err != nil {
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writeOpaque500(w)
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return
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}
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code, err := classes.NewDeviceShortCode()
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if err != nil {
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writeOpaque500(w)
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return
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}
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row = models.DeviceAuthSession{
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TokenHash: classes.HashAPIToken(token),
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ShortCode: &code,
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Status: models.DeviceStatusPending,
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ExpiresAt: &expires,
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}
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if ip != "" {
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row.DeviceIP = &ip
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}
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if ua != "" {
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row.DeviceUserAgent = &ua
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}
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if name != "" {
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row.DeviceName = &name
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}
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err = gdb.WithContext(ctx).Create(&row).Error
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if err == nil {
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break
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}
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var pgErr *pgconn.PgError
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if !errors.As(err, &pgErr) || pgErr.Code != "23505" || attempt+1 >= deviceInsertAttempts {
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pluginLog.Error("golem15.user: store device session", "err", err)
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writeOpaque500(w)
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return
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}
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}
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writeJSON(w, http.StatusOK, map[string]any{
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"success": true,
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"data": map[string]any{
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"token": token,
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"short_code": *row.ShortCode,
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"auth_url": classes.DeviceAuthURL(app, token),
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"expires_at": wire.Time{Time: expires},
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},
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})
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}
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}
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// DeviceStatus is GET /devices/status/{token}, polled by the waiting
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// device. It answers 404 {"error":"Session not found"} for an unknown token
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// and PHP's flat {"success":true,"status":"expired","message":…} for a
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// pending or confirmed session past expires_at (which it marks expired).
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// The first poll after a signed-in user authorized the session receives a
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// session token: {"success":true,"data":{"status":"confirmed","user_id",
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// "message":"Device authorized - complete login","token","user"}}. One
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// guarded confirmed-to-used UPDATE decides which poll that is, so of
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// concurrent polls exactly one gets the token; the others, and every later
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// poll, answer {"success":true,"data":{"status":"used"}}. Other statuses
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// answer {"success":true,"data":{"status":…}}.
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func DeviceStatus(app *backpack.App) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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gdb, secret, ok := sessionDeps(w, app)
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if !ok {
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return
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}
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row, found, err := deviceByToken(r, gdb, r.PathValue("token"))
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if err != nil {
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writeOpaque500(w)
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return
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}
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if !found {
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writeJSON(w, http.StatusNotFound, map[string]any{"error": "Session not found"})
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return
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}
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if row.Status == models.DeviceStatusConfirmed && row.UserID != nil && !row.ExpiredAt(time.Now()) {
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if handOverDevice(w, r, app, gdb, secret, row) {
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return
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}
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// Another poll won the hand-over or the session just expired:
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// answer what the row says now, never a token.
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row, found, err = deviceByID(r, gdb, row.ID)
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if err != nil || !found {
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writeOpaque500(w)
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return
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}
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}
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writeDeviceStatus(w, r, gdb, row)
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}
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}
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// deviceByToken loads the session whose token hash matches token.
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func deviceByToken(r *http.Request, gdb *gorm.DB, token string) (models.DeviceAuthSession, bool, error) {
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var row models.DeviceAuthSession
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if token == "" {
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return row, false, nil
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}
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res := gdb.WithContext(r.Context()).Where("token = ?", classes.HashAPIToken(token)).Limit(1).Find(&row)
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return row, res.RowsAffected == 1, res.Error
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}
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func deviceByID(r *http.Request, gdb *gorm.DB, id uint) (models.DeviceAuthSession, bool, error) {
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var row models.DeviceAuthSession
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res := gdb.WithContext(r.Context()).Where("id = ?", id).Limit(1).Find(&row)
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return row, res.RowsAffected == 1, res.Error
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}
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// writeDeviceStatus answers a status poll that hands over no token. A
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// pending or confirmed session past expires_at is marked expired (used and
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// revoked sessions never are); an expired session answers PHP's flat
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// expired body.
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func writeDeviceStatus(w http.ResponseWriter, r *http.Request, gdb *gorm.DB, row models.DeviceAuthSession) {
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expire := row.ExpiredAt(time.Now())
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if expire || row.Status == models.DeviceStatusExpired {
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if expire {
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if err := gdb.WithContext(r.Context()).Exec(`UPDATE `+deviceTable+` SET status = 'expired', updated_at = NOW()
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WHERE id = ? AND status IN ('pending', 'confirmed')`, row.ID).Error; err != nil {
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writeOpaque500(w)
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return
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}
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}
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writeJSON(w, http.StatusOK, map[string]any{
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"success": true,
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"status": models.DeviceStatusExpired,
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"message": "Authorization session has expired",
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})
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return
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}
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writeJSON(w, http.StatusOK, map[string]any{"success": true, "data": map[string]any{"status": row.Status}})
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}
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// handOverDevice gives the confirmed session's user a session token for the
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// device (D-12a). It reports false, having written nothing, when another
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// poll already took the session or it expired meanwhile; the token it
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// minted is then dropped unsent.
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func handOverDevice(w http.ResponseWriter, r *http.Request, app *backpack.App, gdb *gorm.DB, secret string, row models.DeviceAuthSession) bool {
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ctx := r.Context()
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var user models.User
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res := gdb.WithContext(ctx).Where("id = ?", *row.UserID).Limit(1).Find(&user)
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if res.Error != nil {
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writeOpaque500(w)
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return true
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}
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refused := res.RowsAffected == 0
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if !refused {
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banned, _, err := classes.ThrottleStates(classes.ContextWithThrottle(ctx, app), gdb.WithContext(ctx), []uint{user.ID})
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if err != nil {
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writeOpaque500(w)
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return true
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}
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refused = banned[user.ID]
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}
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if refused {
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// A deactivated, deleted or banned user signs no device in.
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if err := gdb.WithContext(ctx).Exec(`UPDATE `+deviceTable+` SET status = 'revoked', updated_at = NOW()
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WHERE id = ? AND status = 'confirmed'`, row.ID).Error; err != nil {
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writeOpaque500(w)
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return true
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}
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return false
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}
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token, jti, err := mintWithJTI(app, secret, &user, requestURL(r))
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if err != nil {
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writeOpaque500(w)
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return true
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}
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payload, err := apiArray(ctx, app, &user)
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if err != nil {
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writeOpaque500(w)
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return true
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}
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res = gdb.WithContext(ctx).Exec(`UPDATE `+deviceTable+`
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SET status = 'used', used_at = NOW(), last_activity_at = NOW(), jwt_jti = ?, updated_at = NOW()
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WHERE id = ? AND status = 'confirmed' AND expires_at > NOW()`, jti, row.ID)
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if res.Error != nil {
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writeOpaque500(w)
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return true
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}
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if res.RowsAffected != 1 {
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return false
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}
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if err := FinishLogin(ctx, app, gdb, &user, deviceClientIP(app, r)); err != nil {
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pluginLog.Warn("golem15.user: finish device login", "user_id", user.ID, "err", err)
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}
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if err := FireLoginEvent(ctx, app, &user, classes.LoginSourceDevice); err != nil {
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pluginLog.Warn("golem15.user: login event listener", "user_id", user.ID, "err", err)
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}
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writeJSON(w, http.StatusOK, map[string]any{
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"success": true,
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"data": map[string]any{
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"status": models.DeviceStatusConfirmed,
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"user_id": user.ID,
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"message": "Device authorized - complete login",
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"token": token,
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"user": payload,
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},
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})
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return true
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}
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// DeviceAuthorize is POST /devices/authorize: a signed-in user (a valid,
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// not blacklisted session token; no second-factor check, D-12c) binds a
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// pending device session to themselves by its short_code (hyphens and
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// spaces optional, any case) or by its token (the QR code). A short_code of
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// other than 8 characters after removing hyphens answers 422 {"error":
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// "Please enter a valid 8-character code"}; an unknown, expired, used,
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// revoked or foreign session answers 400 {"error":"Invalid or expired
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// code"}; success, and repeating it for a session the caller already
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// confirmed, answers {"success":true,"message":"Device authorized
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// successfully"}. Without a session it answers 401 {"error":"Unauthorized"}.
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// The fields are read from the body only, never the query string.
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func DeviceAuthorize(app *backpack.App) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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gdb, secret, ok := sessionDeps(w, app)
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if !ok {
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return
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}
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user, _, ok := deviceCaller(w, r, app, gdb, secret)
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if !ok {
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return
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}
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fields, err := readBodyFields(r)
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if err != nil {
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writeOpaque500(w)
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return
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}
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invalid := func() {
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writeJSON(w, http.StatusBadRequest, map[string]any{"error": "Invalid or expired code"})
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}
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var (
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row models.DeviceAuthSession
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found bool
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)
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if _, has := fields["short_code"]; has {
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raw := strings.ReplaceAll(strField(fields, "short_code"), "-", "")
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if len(raw) != 8 {
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writeJSON(w, http.StatusUnprocessableEntity, map[string]any{"error": "Please enter a valid 8-character code"})
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return
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}
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code, valid := classes.NormalizeDeviceShortCode(raw)
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if !valid {
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invalid()
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return
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}
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res := gdb.WithContext(r.Context()).Where("short_code = ?", code).Limit(1).Find(&row)
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if res.Error != nil {
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writeOpaque500(w)
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return
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}
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found = res.RowsAffected == 1
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} else if _, has := fields["token"]; has {
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row, found, err = deviceByToken(r, gdb, strField(fields, "token"))
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if err != nil {
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writeOpaque500(w)
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return
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}
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}
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if !found {
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invalid()
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return
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}
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res := gdb.WithContext(r.Context()).Exec(`UPDATE `+deviceTable+`
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SET status = 'confirmed', user_id = ?, confirmed_at = NOW(), auth_ip = ?, updated_at = NOW()
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WHERE id = ? AND status = 'pending' AND (user_id IS NULL OR user_id = ?) AND expires_at > NOW()`,
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user.ID, nullableString(deviceClientIP(app, r)), row.ID, user.ID)
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if res.Error != nil {
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writeOpaque500(w)
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return
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}
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if res.RowsAffected != 1 {
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now, ok, err := deviceByID(r, gdb, row.ID)
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if err != nil || !ok {
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writeOpaque500(w)
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return
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}
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again := now.Status == models.DeviceStatusConfirmed && now.UserID != nil && *now.UserID == user.ID && !now.ExpiredAt(time.Now())
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if !again {
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if now.ExpiredAt(time.Now()) {
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_ = gdb.WithContext(r.Context()).Exec(`UPDATE `+deviceTable+` SET status = 'expired', updated_at = NOW()
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WHERE id = ? AND status IN ('pending', 'confirmed')`, now.ID).Error
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}
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invalid()
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return
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}
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}
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writeJSON(w, http.StatusOK, map[string]any{"success": true, "message": "Device authorized successfully"})
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}
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}
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// nullableString is nil for "", else s.
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func nullableString(s string) any {
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if s == "" {
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return nil
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}
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return s
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}
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// mintWithJTI mints the session JWT as mintFor does and also returns its
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// jti, which device sessions store.
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func mintWithJTI(app *backpack.App, secret string, user *models.User, issuer string) (string, string, error) {
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return bouncer.Mint(secret, strconv.FormatUint(uint64(user.ID), 10), issuer, sessionTTL(app))
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}
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// DeviceIndex is GET /devices: the caller's authorized devices (sessions
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// confirmed or used), most recent activity first, as {"success":true,
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// "devices":[{id, device_name, device_ip, authorized_at, last_activity,
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// is_current}]}. device_name is the stored name or one parsed from the user
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// agent (classes.DeviceDisplayName); is_current is true for the session
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// whose token is the one the request carries. Without a session it answers
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// 401 {"error":"Unauthorized"}.
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func DeviceIndex(app *backpack.App) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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gdb, secret, ok := sessionDeps(w, app)
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if !ok {
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return
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}
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user, jti, ok := deviceCaller(w, r, app, gdb, secret)
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if !ok {
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return
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}
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var rows []models.DeviceAuthSession
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if err := gdb.WithContext(r.Context()).
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Where("user_id = ? AND status IN ?", user.ID, []string{models.DeviceStatusConfirmed, models.DeviceStatusUsed}).
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Order("last_activity_at DESC NULLS LAST, id DESC").
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Find(&rows).Error; err != nil {
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writeOpaque500(w)
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return
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}
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devices := make([]map[string]any, 0, len(rows))
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for _, row := range rows {
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ua := ""
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if row.DeviceUserAgent != nil {
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ua = *row.DeviceUserAgent
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}
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devices = append(devices, map[string]any{
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"id": row.ID,
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"device_name": classes.DeviceDisplayName(row.DeviceName, ua),
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"device_ip": row.DeviceIP,
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"authorized_at": wireTimeOrNil(row.ConfirmedAt),
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"last_activity": wireTimeOrNil(row.LastActivityAt),
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"is_current": jti != "" && row.JWTJTI != nil && *row.JWTJTI == jti,
|
|
})
|
|
}
|
|
writeJSON(w, http.StatusOK, map[string]any{"success": true, "devices": wire.Slice(devices)})
|
|
}
|
|
}
|
|
|
|
// DeviceDestroy is DELETE /devices/{id}: the caller revokes one of their
|
|
// device sessions. In one transaction the row is marked revoked and the jti
|
|
// of the session token the device holds (followed through refresh) is
|
|
// added to the JWT blacklist for the token's whole refresh window, so the
|
|
// device is signed out at once and cannot refresh. The jti is the one the
|
|
// revoking UPDATE returns, read under the row lock a concurrent refresh's
|
|
// hand-over also takes (classes.FollowDeviceJTI), so a refresh that moved
|
|
// the session first is blacklisted and one that comes after is refused. A
|
|
// blacklist failure answers the opaque 500 and leaves the row as it was.
|
|
// Success answers PHP's body with success true and the message Device
|
|
// revoked successfully, also for a row already revoked; a row of another
|
|
// user, or none, answers 404 with the error Device not found; no session
|
|
// answers 401 {"error":"Unauthorized"}.
|
|
func DeviceDestroy(app *backpack.App) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
gdb, secret, ok := sessionDeps(w, app)
|
|
if !ok {
|
|
return
|
|
}
|
|
user, _, ok := deviceCaller(w, r, app, gdb, secret)
|
|
if !ok {
|
|
return
|
|
}
|
|
notFound := func() { writeJSON(w, http.StatusNotFound, map[string]any{"error": "Device not found"}) }
|
|
id, err := strconv.ParseUint(r.PathValue("id"), 10, 64)
|
|
if err != nil || id == 0 {
|
|
notFound()
|
|
return
|
|
}
|
|
found := false
|
|
err = lagoon.Transaction(r.Context(), gdb, func(ctx context.Context, tx *gorm.DB) error {
|
|
// The jti current at the revoke, under the row lock: never one
|
|
// read before a concurrent refresh moved the session on.
|
|
var revoked []struct {
|
|
JWTJTI *string `gorm:"column:jwt_jti"`
|
|
}
|
|
if err := tx.WithContext(ctx).Raw(`UPDATE `+deviceTable+` SET status = 'revoked', updated_at = NOW()
|
|
WHERE id = ? AND user_id = ?
|
|
RETURNING jwt_jti`, id, user.ID).Scan(&revoked).Error; err != nil {
|
|
return err
|
|
}
|
|
if len(revoked) == 0 {
|
|
return nil
|
|
}
|
|
found = true
|
|
jti := revoked[0].JWTJTI
|
|
if jti == nil || *jti == "" {
|
|
return nil
|
|
}
|
|
bl, ok := app.Lookup[bouncer.BlacklistStore]()
|
|
if !ok || bl == nil {
|
|
return errors.New("golem15.user: no JWT blacklist store is published")
|
|
}
|
|
now := time.Now()
|
|
return bl.Add(ctx, *jti, now.Add(refreshTTL(app)+sessionTTL(app)+time.Minute), now)
|
|
})
|
|
if err != nil {
|
|
pluginLog.Error("golem15.user: revoke device session", "user_id", user.ID, "err", err)
|
|
writeOpaque500(w)
|
|
return
|
|
}
|
|
if !found {
|
|
notFound()
|
|
return
|
|
}
|
|
writeJSON(w, http.StatusOK, map[string]any{"success": true, "message": "Device revoked successfully"})
|
|
}
|
|
}
|
|
|
|
// wireTimeOrNil is t as a +00:00 timestamp, or nil.
|
|
func wireTimeOrNil(t *time.Time) any {
|
|
if t == nil {
|
|
return nil
|
|
}
|
|
return wire.Time{Time: *t}
|
|
}
|