Files
MindSift/internal/api/handlers_auth.go
T
sandrodachandClaude Opus 5.5 1af3a6e90a
MindSift CI & Docker Release / Build, Test in Container & Push (push) Successful in 1m52s
feat(auth): server-side sessions and current password for account changes (FLAW-30, FLAW-31)
- Every login is a session (device, IP, last use); the token's jti is its ID.
  Sessions end on logout, per device from the profile, or after 30 idle days.
- Tokens older than a day are renewed via the X-Session-Token header.
- Changing password or login e-mail needs the current password; a new
  password logs out all other devices and mails the old address.
- Demo reset keeps the demo visitors' sessions.
- revoked_tokens is replaced by sessions (migration 4); everyone is logged
  out once after the upgrade.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-29 19:25:22 +01:00

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package api
import (
"encoding/json"
"errors"
"fmt"
"io"
"log/slog"
"net/http"
"strings"
"time"
"github.com/go-chi/chi/v5"
"github.com/sandrodach/mindsift/internal/auth"
"github.com/sandrodach/mindsift/internal/domain"
"github.com/sandrodach/mindsift/internal/storage"
)
// --- HANDLERS ---
func (s *Server) handleHealth(w http.ResponseWriter, r *http.Request) {
writeJSON(w, http.StatusOK, map[string]interface{}{
"status": "ok",
"service": "mindsift",
"time": domain.NowISO(),
})
}
func (s *Server) handleAuthStatus(w http.ResponseWriter, r *http.Request) {
count, _ := s.store.CountUsers()
sys, _ := s.store.GetSystemSettings()
allowReg := false
instanceName := "MindSift"
if sys != nil {
allowReg = sys.AllowRegistration
if sys.InstanceName != "" {
instanceName = sys.InstanceName
}
}
status := map[string]interface{}{
"needsSetup": count == 0,
"allowRegistration": allowReg,
"instanceName": instanceName,
"demoMode": s.cfg.DemoMode,
"sharingMode": s.store.SharingMode(),
"passwordReset": s.passwordResetAvailable(),
// Public so the login screen can link Impressum and Datenschutz
"legal": map[string]interface{}{
"imprintUrl": s.cfg.Legal.ImprintURL,
"hasImprintContent": s.cfg.Legal.ImprintContent != "",
"privacyUrl": s.cfg.Legal.PrivacyURL,
"hasPrivacyContent": s.cfg.Legal.PrivacyContent != "",
},
}
// Countdown to the next demo reset; seconds as well, so client clocks do not matter
if next := s.demoNextReset(); !next.IsZero() {
status["demoNextReset"] = next.UTC().Format(time.RFC3339)
status["demoResetInSeconds"] = int(time.Until(next).Seconds())
status["demoResetMinutes"] = s.cfg.DemoResetMinutes
}
writeJSON(w, http.StatusOK, status)
}
// handleLegalText serves the configured Markdown of the imprint or privacy notice (public, no login).
func (s *Server) handleLegalText(w http.ResponseWriter, r *http.Request) {
content := ""
switch chi.URLParam(r, "type") {
case "imprint":
content = s.cfg.Legal.ImprintContent
case "privacy":
content = s.cfg.Legal.PrivacyContent
}
if content == "" {
writeError(w, http.StatusNotFound, "Kein Text hinterlegt")
return
}
writeJSON(w, http.StatusOK, map[string]string{"content": content})
}
func (s *Server) handleFirstBootSetup(w http.ResponseWriter, r *http.Request) {
count, err := s.store.CountUsers()
if err != nil || count > 0 {
writeError(w, http.StatusForbidden, "Ersteinrichtung wurde bereits abgeschlossen")
return
}
var req struct {
Email string `json:"email"`
Password string `json:"password"`
DisplayName string `json:"displayName"`
InstanceName string `json:"instanceName"`
AllowRegistration bool `json:"allowRegistration"`
SharingMode string `json:"sharingMode"`
CreateSampleData bool `json:"createSampleData"`
}
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
writeError(w, http.StatusBadRequest, "Ungültige Anfrage")
return
}
if strings.TrimSpace(req.Email) == "" {
writeError(w, http.StatusBadRequest, "E-Mail-Adresse erforderlich")
return
}
if err := auth.ValidatePassword(req.Password); err != nil {
writeError(w, http.StatusBadRequest, err.Error())
return
}
if strings.TrimSpace(req.DisplayName) == "" {
req.DisplayName = "Administrator"
}
hash, err := auth.HashPassword(req.Password)
if err != nil {
writeError(w, http.StatusInternalServerError, "Fehler beim Passwort-Hashing")
return
}
user, err := s.store.CreateUser(req.Email, hash, req.DisplayName, "admin")
if err != nil {
writeError(w, http.StatusBadRequest, err.Error())
return
}
sys, _ := s.store.GetSystemSettings()
if sys != nil {
if strings.TrimSpace(req.InstanceName) != "" {
sys.InstanceName = strings.TrimSpace(req.InstanceName)
}
sys.AllowRegistration = req.AllowRegistration
sys.SharingMode = storage.NormalizeSharingMode(req.SharingMode)
if err := s.store.UpdateSystemSettings(sys); err != nil {
writeError(w, http.StatusInternalServerError, "Einstellungen konnten nicht gespeichert werden: "+err.Error())
return
}
// In organization mode the first admin starts in an organization named after the instance
if sys.SharingMode == storage.SharingOrganizations {
if org, err := s.store.CreateOrganization(sys.InstanceName); err == nil {
_ = s.store.SetUserOrganization(user.ID, org.ID)
user.OrganizationID = org.ID
}
}
}
if req.CreateSampleData {
_ = s.store.SeedStarterContent(user)
}
token, err := s.startSession(r, user)
if err != nil {
writeError(w, http.StatusInternalServerError, "Token konnte nicht erstellt werden")
return
}
writeJSON(w, http.StatusCreated, map[string]interface{}{
"token": token,
"user": user,
})
}
func (s *Server) handleRegister(w http.ResponseWriter, r *http.Request) {
var req struct {
Email string `json:"email"`
Password string `json:"password"`
DisplayName string `json:"displayName"`
InviteCode string `json:"inviteCode"`
}
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
writeError(w, http.StatusBadRequest, "Ungültige Anfrage")
return
}
if strings.TrimSpace(req.Email) == "" {
writeError(w, http.StatusBadRequest, "E-Mail-Adresse erforderlich")
return
}
if err := auth.ValidatePassword(req.Password); err != nil {
writeError(w, http.StatusBadRequest, err.Error())
return
}
if strings.TrimSpace(req.DisplayName) == "" {
req.DisplayName = strings.Split(req.Email, "@")[0]
}
count, _ := s.store.CountUsers()
role := "member"
var validInvite *domain.UserInvite
if strings.TrimSpace(req.InviteCode) != "" {
inv, err := s.store.GetUserInviteByCode(req.InviteCode)
if err != nil {
writeError(w, http.StatusForbidden, err.Error())
return
}
if inv.Email != "" && !strings.EqualFold(inv.Email, strings.TrimSpace(req.Email)) {
writeError(w, http.StatusForbidden, "Dieser Einladungscode ist an eine andere E-Mail-Adresse gebunden")
return
}
validInvite = inv
role = inv.Role
} else if count == 0 {
role = "admin"
} else {
sysSettings, _ := s.store.GetSystemSettings()
if sysSettings == nil || !sysSettings.AllowRegistration {
writeError(w, http.StatusForbidden, "Öffentliche Registrierung ist deaktiviert – bitte nutze einen Einladungscode vom Administrator")
return
}
}
hash, err := auth.HashPassword(req.Password)
if err != nil {
writeError(w, http.StatusInternalServerError, "Fehler beim Passwort-Hashing")
return
}
user, err := s.store.CreateUser(req.Email, hash, req.DisplayName, role)
if err != nil {
writeError(w, http.StatusConflict, "E-Mail-Adresse existiert bereits")
return
}
if validInvite != nil {
// Otherwise the code could be used again
if err := s.store.MarkUserInviteUsed(validInvite.ID, user.ID); err != nil {
slog.Error("Einladungscode konnte nicht als benutzt markiert werden", "invite", validInvite.ID, "error", err)
}
if validInvite.OrganizationID != "" {
_ = s.store.SetUserOrganization(user.ID, validInvite.OrganizationID)
user.OrganizationID = validInvite.OrganizationID
}
}
token, err := s.startSession(r, user)
if err != nil {
writeError(w, http.StatusInternalServerError, "Token konnte nicht erstellt werden")
return
}
writeJSON(w, http.StatusCreated, map[string]interface{}{
"token": token,
"user": user,
})
}
func (s *Server) handleLogin(w http.ResponseWriter, r *http.Request) {
var req struct {
Email string `json:"email"`
Username string `json:"username"`
Login string `json:"login"`
Password string `json:"password"`
}
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
writeError(w, http.StatusBadRequest, "Ungültige Anfrage")
return
}
identifier := strings.TrimSpace(req.Login)
if identifier == "" {
identifier = strings.TrimSpace(req.Username)
}
if identifier == "" {
identifier = strings.TrimSpace(req.Email)
}
if identifier == "" || req.Password == "" {
writeError(w, http.StatusBadRequest, "Benutzername/E-Mail und Passwort erforderlich")
return
}
user, err := s.store.GetUserByLogin(identifier)
// Unknown names are counted under the typed login, so locking looks the same as for real accounts
account := "login:" + strings.ToLower(identifier)
if err == nil {
account = user.ID
}
ip := clientIPFrom(r)
if wait := s.loginGuard.lockedFor(account, ip); wait > 0 {
slog.Warn("Login gesperrt nach Fehlversuchen", "login", identifier, "remote_addr", r.RemoteAddr, "wait", wait.Round(time.Second))
writeLoginLocked(w, wait)
return
}
if err != nil {
s.loginGuard.recordFailure(account, ip)
slog.Warn("Login fehlgeschlagen: Benutzer existiert nicht", "login", identifier, "remote_addr", r.RemoteAddr)
writeError(w, http.StatusUnauthorized, "Benutzername/E-Mail oder Passwort ungültig")
return
}
if !auth.CheckPassword(req.Password, user.PasswordHash) {
s.loginGuard.recordFailure(account, ip)
slog.Warn("Login fehlgeschlagen: Falsches Passwort", "login", identifier, "user_id", user.ID, "display_name", user.DisplayName, "remote_addr", r.RemoteAddr)
writeError(w, http.StatusUnauthorized, "Benutzername/E-Mail oder Passwort ungültig")
return
}
s.loginGuard.recordSuccess(account, ip)
if !user.IsActive {
slog.Warn("Login verweigert: Benutzerkonto ist deaktiviert", "login", identifier, "user_id", user.ID, "display_name", user.DisplayName, "remote_addr", r.RemoteAddr)
writeError(w, http.StatusForbidden, "Dieses Benutzerkonto ist deaktiviert")
return
}
token, err := s.startSession(r, user)
if err != nil {
slog.Error("Login-Token konnte nicht erstellt werden", "login", identifier, "user_id", user.ID, "error", err)
writeError(w, http.StatusInternalServerError, "Token konnte nicht erstellt werden")
return
}
slog.Info("Login erfolgreich", "login", identifier, "user_id", user.ID, "display_name", user.DisplayName, "role", user.Role, "remote_addr", r.RemoteAddr)
writeJSON(w, http.StatusOK, map[string]interface{}{
"token": token,
"user": user,
})
}
func (s *Server) handleQuickStart(w http.ResponseWriter, r *http.Request) {
writeError(w, http.StatusForbidden, "Automatischer Gast-Login ist deaktiviert – bitte anmelden")
}
func (s *Server) handleMe(w http.ResponseWriter, r *http.Request) {
userID := auth.GetUserID(r.Context())
user, err := s.store.GetUserByID(userID)
if err != nil {
writeError(w, http.StatusNotFound, "Benutzer nicht gefunden")
return
}
stats, _ := s.store.GetDashboardStats(userID)
writeJSON(w, http.StatusOK, map[string]interface{}{
"user": user,
"stats": stats,
// The settings disable "Konto löschen" for the last administrator
"isLastAdmin": s.store.IsLastAdmin(userID),
})
}
func (s *Server) handleStats(w http.ResponseWriter, r *http.Request) {
userID := auth.GetUserID(r.Context())
stats, err := s.store.GetDashboardStats(userID)
if err != nil {
writeError(w, http.StatusInternalServerError, err.Error())
return
}
writeJSON(w, http.StatusOK, stats)
}
// handlePurgeOwnData deletes all notes, tasks, thoughts and lists of the caller; the account stays.
func (s *Server) handlePurgeOwnData(w http.ResponseWriter, r *http.Request) {
user, ok := s.confirmPassword(w, r)
if !ok {
return
}
if err := s.store.PurgeUserData(user.ID); err != nil {
writeError(w, http.StatusInternalServerError, err.Error())
return
}
slog.Info("Benutzer hat alle eigenen Daten gelöscht", "user_id", user.ID)
writeJSON(w, http.StatusOK, map[string]bool{"deleted": true})
}
// handleDeleteOwnAccount deletes the caller's account with all data; never the last administrator.
func (s *Server) handleDeleteOwnAccount(w http.ResponseWriter, r *http.Request) {
user, ok := s.confirmPassword(w, r)
if !ok {
return
}
if err := s.store.DeleteOwnAccount(user.ID); err != nil {
status := http.StatusInternalServerError
if errors.Is(err, storage.ErrLastAdmin) {
status = http.StatusForbidden
}
writeError(w, status, err.Error())
return
}
slog.Info("Benutzer hat sein Konto gelöscht", "user_id", user.ID)
writeJSON(w, http.StatusOK, map[string]bool{"deleted": true})
}
// importUpload reads the multipart field "file" (max. storage.MaxImportUploadBytes).
func importUpload(w http.ResponseWriter, r *http.Request) ([]byte, string, error) {
r.Body = http.MaxBytesReader(w, r.Body, storage.MaxImportUploadBytes+1<<20)
file, header, err := r.FormFile("file")
if err != nil {
return nil, "", fmt.Errorf("Keine Datei erhalten oder Datei zu groß (max. 100 MB)")
}
defer file.Close()
data, err := io.ReadAll(io.LimitReader(file, storage.MaxImportUploadBytes+1))
if err != nil || len(data) > storage.MaxImportUploadBytes {
return nil, "", fmt.Errorf("Datei zu groß (max. 100 MB)")
}
return data, header.Filename, nil
}
// --- USER SETTINGS & ALARMS ---
func (s *Server) handleLogout(w http.ResponseWriter, r *http.Request) {
userID := auth.GetUserID(r.Context())
// The session must really end; the client is told if it did not
if sid := sessionIDFrom(r); sid != "" {
if err := s.store.RevokeSession(userID, sid); err != nil && !errors.Is(err, storage.ErrSessionNotFound) {
writeError(w, http.StatusInternalServerError, "Abmelden fehlgeschlagen")
return
}
}
// Streams are not tied to one session; other devices reconnect with a new ticket on their own
s.wsHub.DisconnectUser(userID)
writeJSON(w, http.StatusOK, map[string]bool{"success": true})
}
func (s *Server) handleRevokeAllSessions(w http.ResponseWriter, r *http.Request) {
userID := auth.GetUserID(r.Context())
if err := s.store.RevokeAllUserTokens(userID); err != nil {
writeError(w, http.StatusInternalServerError, "Sitzungen konnten nicht beendet werden")
return
}
s.wsHub.DisconnectUser(userID)
writeJSON(w, http.StatusOK, map[string]bool{"success": true})
}
func (s *Server) handleUpdateUserSettings(w http.ResponseWriter, r *http.Request) {
userID := auth.GetUserID(r.Context())
var req struct {
DisplayName *string `json:"displayName"`
Email *string `json:"email"`
Password *string `json:"password"`
AvatarURL *string `json:"avatarUrl"`
AlarmChannels *[]string `json:"alarmChannels"`
AlarmEmail *string `json:"alarmEmail"`
DiscordWebhookURL *string `json:"discordWebhookUrl"`
CustomWebhookURL *string `json:"customWebhookUrl"`
NotifyBeforeMinutes *int `json:"notifyBeforeMinutes"`
// Needed to change password or e-mail address (FLAW-30)
CurrentPassword string `json:"currentPassword"`
}
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
writeError(w, http.StatusBadRequest, "Ungültiges JSON")
return
}
before, err := s.store.GetUserByID(userID)
if err != nil || before == nil {
writeError(w, http.StatusNotFound, "Benutzer nicht gefunden")
return
}
changesPassword := req.Password != nil && strings.TrimSpace(*req.Password) != ""
changesEmail := req.Email != nil && !strings.EqualFold(strings.TrimSpace(*req.Email), before.Email)
if (changesPassword || changesEmail) && !s.checkCurrentPassword(w, r, before, req.CurrentPassword) {
return
}
// Alarm URLs are checked before they are stored (SSRF protection, see netguard.go)
allowPrivate := s.allowPrivateWebhooks()
if req.DiscordWebhookURL != nil {
if err := validateWebhookURL(*req.DiscordWebhookURL, true, allowPrivate); err != nil {
writeError(w, http.StatusBadRequest, "Discord-Webhook: "+err.Error())
return
}
}
if req.CustomWebhookURL != nil {
if err := validateWebhookURL(*req.CustomWebhookURL, false, allowPrivate); err != nil {
writeError(w, http.StatusBadRequest, "Webhook-URL: "+err.Error())
return
}
}
if req.Password != nil && strings.TrimSpace(*req.Password) != "" {
if err := auth.ValidatePassword(*req.Password); err != nil {
writeError(w, http.StatusBadRequest, err.Error())
return
}
hash, err := auth.HashPassword(*req.Password)
if err != nil {
writeError(w, http.StatusInternalServerError, "Fehler beim Hashen des Passworts")
return
}
if err := s.store.UpdateUserPassword(userID, hash); err != nil {
writeError(w, http.StatusInternalServerError, "Passwort konnte nicht gespeichert werden")
return
}
// Every other device is logged out; this one keeps its session with a fresh token
sid := sessionIDFrom(r)
if err := s.store.RevokeOtherSessions(userID, sid); err != nil {
writeError(w, http.StatusInternalServerError, "Andere Sitzungen konnten nicht beendet werden")
return
}
s.wsHub.DisconnectUser(userID)
if fresh, err := s.store.GetUserByID(userID); err == nil {
current := &auth.Claims{}
current.ID = sid
s.renewSessionToken(w, fresh, current, true)
}
}
u, err := s.store.UpdateUserFull(
userID,
req.DisplayName,
req.Email,
nil,
nil,
req.AlarmChannels,
req.AlarmEmail,
req.DiscordWebhookURL,
req.CustomWebhookURL,
req.NotifyBeforeMinutes,
req.AvatarURL,
)
if err != nil {
writeError(w, http.StatusBadRequest, err.Error())
return
}
if changesPassword || changesEmail {
s.notifyAccountChange(before, changesPassword, changesEmail, u.Email)
}
writeJSON(w, http.StatusOK, u)
}
// checkCurrentPassword verifies the current password for sensitive changes; wrong attempts count
// towards the login protection, so this cannot be used to guess the password.
func (s *Server) checkCurrentPassword(w http.ResponseWriter, r *http.Request, user *domain.User, password string) bool {
ip := clientIPFrom(r)
if wait := s.loginGuard.lockedFor(user.ID, ip); wait > 0 {
writeLoginLocked(w, wait)
return false
}
// A forgotten field is no guess and does not count as a failure
if password == "" || !auth.CheckPassword(password, user.PasswordHash) {
if password != "" {
s.loginGuard.recordFailure(user.ID, ip)
}
writeError(w, http.StatusForbidden, "Bitte gib zur Bestätigung dein aktuelles Passwort richtig ein")
return false
}
return true
}
// notifyAccountChange tells the previous address about a new password or e-mail address, so a
// takeover does not go unnoticed. Only when mail is set up; errors are logged, never shown.
func (s *Server) notifyAccountChange(before *domain.User, password, email bool, newEmail string) {
if _, err := s.smtpSettings(); err != nil || before.Email == "" {
return
}
var what []string
if password {
what = append(what, "dein Passwort wurde geändert")
}
if email {
what = append(what, "die E-Mail-Adresse deines Kontos wurde auf "+newEmail+" geändert")
}
body := fmt.Sprintf("Hallo %s,\n\nin MindSift %s.\n\nWarst du das nicht, setze bitte sofort dein Passwort zurück und beende alle Sitzungen in den Kontoeinstellungen, oder wende dich an die Administration.\n",
before.DisplayName, strings.Join(what, " und "))
go func() {
_ = s.sendEmailNotification(before.Email, "MindSift: Änderung an deinem Konto", body)
}()
}
func (s *Server) handleTestUserAlarm(w http.ResponseWriter, r *http.Request) {
userID := auth.GetUserID(r.Context())
user, err := s.store.GetUserByID(userID)
if err != nil || user == nil {
writeError(w, http.StatusNotFound, "Benutzer nicht gefunden")
return
}
var req struct {
Channel string `json:"channel"` // email | discord | webhook
Target string `json:"target"` // optional override URL or email
}
if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
writeError(w, http.StatusBadRequest, "Ungültiges JSON")
return
}
channel := strings.ToLower(strings.TrimSpace(req.Channel))
target := strings.TrimSpace(req.Target)
switch channel {
case "discord":
url := target
if url == "" {
url = user.DiscordWebhookURL
}
if url == "" {
writeError(w, http.StatusBadRequest, "Bitte eine Discord Webhook URL angeben")
return
}
if err := s.sendDiscordNotification(url, "Test-Alarm von MindSift", "Dein Discord-Alarmkanal funktioniert einwandfrei!", domain.NowISO()[:10], "normal"); err != nil {
writeError(w, http.StatusBadGateway, "Discord-Fehler: "+err.Error())
return
}
case "webhook":
url := target
if url == "" {
url = user.CustomWebhookURL
}
if url == "" {
writeError(w, http.StatusBadRequest, "Bitte eine Webhook-URL angeben")
return
}
if err := s.sendCustomWebhookNotification(url, "test_alarm", "Test-Alarm von MindSift", "Dein eigener Webhook empfängt MindSift-Alarme!", domain.NowISO()[:10], "normal"); err != nil {
writeError(w, http.StatusBadGateway, "Webhook-Fehler: "+err.Error())
return
}
case "email":
toEmail := target
if toEmail == "" {
toEmail = user.AlarmEmail
}
if toEmail == "" {
toEmail = user.Email
}
if err := s.sendEmailNotification(toEmail, "⏰ MindSift Test-Alarm", "Hallo "+user.DisplayName+",\n\ndein E-Mail-Alarmkanal in MindSift ist erfolgreich eingerichtet und einsatzbereit.\n\nViele Grüße\nDeine MindSift Instanz"); err != nil {
writeError(w, http.StatusBadGateway, "E-Mail-Versand fehlgeschlagen: "+err.Error())
return
}
default:
writeError(w, http.StatusBadRequest, "Unbekannter Alarm-Kanal (erlaubt: email, discord, webhook)")
return
}
writeJSON(w, http.StatusOK, map[string]interface{}{
"sent": true,
"channel": channel,
})
}
func (s *Server) handleGetUsersDirectory(w http.ResponseWriter, r *http.Request) {
userID := auth.GetUserID(r.Context())
users, err := s.store.GetDiscoverableUsers(userID)
if err != nil {
writeError(w, http.StatusInternalServerError, err.Error())
return
}
writeJSON(w, http.StatusOK, users)
}