feat: implement admin and OIDC authentication methods; add login and user info endpoints

Signed-off-by: Noste <83548733+Noooste@users.noreply.github.com>

backend/internal/auth/auth.go

@@ -15,7 +15,8 @@ import (
 
 // AuthService handles authentication operations
 type AuthService struct {
-	config       *config.AuthConfig
+	authConfig   *config.AuthConfig
+	serverConfig *config.ServerConfig
 	oidcProvider *oidc.Provider
 	oidcVerifier *oidc.IDTokenVerifier
 	oauth2Config *oauth2.Config
@@ -31,19 +32,20 @@ type UserInfo struct {
 }
 
 // NewAuthService creates a new authentication service
-func NewAuthService(cfg *config.AuthConfig) (*AuthService, error) {
+func NewAuthService(authCfg *config.AuthConfig, serverCfg *config.ServerConfig) (*AuthService, error) {
 	jwtService, err := NewJWTService()
 	if err != nil {
 		return nil, fmt.Errorf("failed to initialize JWT service: %w", err)
 	}
 
 	service := &AuthService{
-		config:     cfg,
-		jwtService: jwtService,
+		authConfig:   authCfg,
+		serverConfig: serverCfg,
+		jwtService:   jwtService,
 	}
 
 	// Initialize OIDC if enabled
-	if cfg.Mode == "oidc" && cfg.OIDC.Enabled {
+	if authCfg.OIDC.Enabled {
 		if err := service.initOIDC(); err != nil {
 			return nil, fmt.Errorf("failed to initialize OIDC: %w", err)
 		}
@@ -57,7 +59,7 @@ func (a *AuthService) initOIDC() error {
 	ctx := context.Background()
 
 	// Create OIDC provider
-	provider, err := oidc.NewProvider(ctx, a.config.OIDC.IssuerURL)
+	provider, err := oidc.NewProvider(ctx, a.authConfig.OIDC.IssuerURL)
 	if err != nil {
 		return fmt.Errorf("failed to create OIDC provider: %w", err)
 	}
@@ -66,18 +68,23 @@ func (a *AuthService) initOIDC() error {
 
 	// Create ID token verifier
 	verifierConfig := &oidc.Config{
-		ClientID:        a.config.OIDC.ClientID,
-		SkipIssuerCheck: a.config.OIDC.SkipIssuerCheck,
-		SkipExpiryCheck: a.config.OIDC.SkipExpiryCheck,
+		ClientID:        a.authConfig.OIDC.ClientID,
+		SkipIssuerCheck: a.authConfig.OIDC.SkipIssuerCheck,
+		SkipExpiryCheck: a.authConfig.OIDC.SkipExpiryCheck,
 	}
 	a.oidcVerifier = provider.Verifier(verifierConfig)
 
+	// Construct redirect URL from server config
+	// Use root_url if set, otherwise construct from protocol/domain
+	redirectURL := a.serverConfig.RootURL + "/auth/oidc/callback"
+
 	// Create OAuth2 config
 	a.oauth2Config = &oauth2.Config{
-		ClientID:     a.config.OIDC.ClientID,
-		ClientSecret: a.config.OIDC.ClientSecret,
+		ClientID:     a.authConfig.OIDC.ClientID,
+		ClientSecret: a.authConfig.OIDC.ClientSecret,
+		RedirectURL:  redirectURL,
 		Endpoint:     provider.Endpoint(),
-		Scopes:       a.config.OIDC.Scopes,
+		Scopes:       a.authConfig.OIDC.Scopes,
 	}
 
 	return nil
@@ -88,12 +95,12 @@ func (a *AuthService) ValidateBasicAuth(username, password string) bool {
 	// Use constant-time comparison to prevent timing attacks
 	usernameMatch := subtle.ConstantTimeCompare(
 		[]byte(username),
-		[]byte(a.config.Basic.Username),
+		[]byte(a.authConfig.Admin.Username),
 	) == 1
 
 	passwordMatch := subtle.ConstantTimeCompare(
 		[]byte(password),
-		[]byte(a.config.Basic.Password),
+		[]byte(a.authConfig.Admin.Password),
 	) == 1
 
 	return usernameMatch && passwordMatch
@@ -171,14 +178,14 @@ func (a *AuthService) VerifyIDToken(ctx context.Context, rawIDToken string) (*Us
 
 	// Extract user information using configured attributes
 	userInfo := &UserInfo{
-		Username: extractClaim(claims, a.config.OIDC.UsernameAttribute),
-		Email:    extractClaim(claims, a.config.OIDC.EmailAttribute),
-		Name:     extractClaim(claims, a.config.OIDC.NameAttribute),
+		Username: extractClaim(claims, a.authConfig.OIDC.UsernameAttribute),
+		Email:    extractClaim(claims, a.authConfig.OIDC.EmailAttribute),
+		Name:     extractClaim(claims, a.authConfig.OIDC.NameAttribute),
 	}
 
 	// Extract roles if configured
-	if a.config.OIDC.RoleAttributePath != "" {
-		userInfo.Roles = extractRoles(claims, a.config.OIDC.RoleAttributePath)
+	if a.authConfig.OIDC.RoleAttributePath != "" {
+		userInfo.Roles = extractRoles(claims, a.authConfig.OIDC.RoleAttributePath)
 	}
 
 	return userInfo, nil
@@ -207,14 +214,14 @@ func (a *AuthService) GetUserInfo(ctx context.Context, token *oauth2.Token) (*Us
 
 	// Build user info
 	userInfo := &UserInfo{
-		Username: extractClaim(claims, a.config.OIDC.UsernameAttribute),
-		Email:    extractClaim(claims, a.config.OIDC.EmailAttribute),
-		Name:     extractClaim(claims, a.config.OIDC.NameAttribute),
+		Username: extractClaim(claims, a.authConfig.OIDC.UsernameAttribute),
+		Email:    extractClaim(claims, a.authConfig.OIDC.EmailAttribute),
+		Name:     extractClaim(claims, a.authConfig.OIDC.NameAttribute),
 	}
 
 	// Extract roles if configured
-	if a.config.OIDC.RoleAttributePath != "" {
-		userInfo.Roles = extractRoles(claims, a.config.OIDC.RoleAttributePath)
+	if a.authConfig.OIDC.RoleAttributePath != "" {
+		userInfo.Roles = extractRoles(claims, a.authConfig.OIDC.RoleAttributePath)
 	}
 
 	return userInfo, nil
@@ -222,12 +229,12 @@ func (a *AuthService) GetUserInfo(ctx context.Context, token *oauth2.Token) (*Us
 
 // IsAdmin checks if the user has admin role
 func (a *AuthService) IsAdmin(userInfo *UserInfo) bool {
-	if a.config.OIDC.AdminRole == "" {
+	if a.authConfig.OIDC.AdminRole == "" {
 		return false
 	}
 
 	for _, role := range userInfo.Roles {
-		if role == a.config.OIDC.AdminRole {
+		if role == a.authConfig.OIDC.AdminRole {
 			return true
 		}
 	}
@@ -320,7 +327,7 @@ func (a *AuthService) ValidateAndConsumeState(token string) bool {
 
 // GenerateSessionToken generates a JWT session token for the user
 func (a *AuthService) GenerateSessionToken(userInfo *UserInfo) (string, error) {
-	return a.jwtService.GenerateToken(userInfo, a.config.OIDC.SessionMaxAge)
+	return a.jwtService.GenerateToken(userInfo, a.authConfig.OIDC.SessionMaxAge)
 }
 
 // ValidateSessionToken validates a JWT session token and returns user info

backend/internal/config/config.go

@@ -23,6 +23,9 @@ type ServerConfig struct {
 	Port         int    `mapstructure:"port"`
 	Environment  string `mapstructure:"environment"`
 	FrontendPath string `mapstructure:"frontend_path"` // Path to frontend dist directory
+	Domain       string `mapstructure:"domain"`        // Domain name (e.g., garage-ui.example.com)
+	Protocol     string `mapstructure:"protocol"`      // Protocol for internal communication (http/https)
+	RootURL      string `mapstructure:"root_url"`      // Full external URL for redirects (e.g., https://garage-ui.example.com)
 }
 
 // GarageConfig contains Garage S3 connection settings
@@ -37,13 +40,13 @@ type GarageConfig struct {
 
 // AuthConfig contains authentication configuration
 type AuthConfig struct {
-	Mode  string          `mapstructure:"mode"` // "none", "basic", or "oidc"
-	Basic BasicAuthConfig `mapstructure:"basic"`
+	Admin AdminAuthConfig `mapstructure:"admin"`
 	OIDC  OIDCConfig      `mapstructure:"oidc"`
 }
 
-// BasicAuthConfig contains basic authentication settings
-type BasicAuthConfig struct {
+// AdminAuthConfig contains admin authentication settings
+type AdminAuthConfig struct {
+	Enabled  bool   `mapstructure:"enabled"`
 	Username string `mapstructure:"username"`
 	Password string `mapstructure:"password"`
 }
@@ -139,6 +142,9 @@ func bindEnvVars() {
 	viper.BindEnv("server.port", "GARAGE_UI_SERVER_PORT")
 	viper.BindEnv("server.environment", "GARAGE_UI_SERVER_ENVIRONMENT")
 	viper.BindEnv("server.frontend_path", "GARAGE_UI_SERVER_FRONTEND_PATH")
+	viper.BindEnv("server.domain", "GARAGE_UI_SERVER_DOMAIN")
+	viper.BindEnv("server.protocol", "GARAGE_UI_SERVER_PROTOCOL")
+	viper.BindEnv("server.root_url", "GARAGE_UI_SERVER_ROOT_URL")
 
 	// Garage config
 	viper.BindEnv("garage.endpoint", "GARAGE_UI_GARAGE_ENDPOINT")
@@ -149,9 +155,9 @@ func bindEnvVars() {
 	viper.BindEnv("garage.admin_token", "GARAGE_UI_GARAGE_ADMIN_TOKEN")
 
 	// Auth config
-	viper.BindEnv("auth.mode", "GARAGE_UI_AUTH_MODE")
-	viper.BindEnv("auth.basic.username", "GARAGE_UI_AUTH_BASIC_USERNAME")
-	viper.BindEnv("auth.basic.password", "GARAGE_UI_AUTH_BASIC_PASSWORD")
+	viper.BindEnv("auth.admin.enabled", "GARAGE_UI_AUTH_ADMIN_ENABLED")
+	viper.BindEnv("auth.admin.username", "GARAGE_UI_AUTH_ADMIN_USERNAME")
+	viper.BindEnv("auth.admin.password", "GARAGE_UI_AUTH_ADMIN_PASSWORD")
 
 	// OIDC config
 	viper.BindEnv("auth.oidc.enabled", "GARAGE_UI_AUTH_OIDC_ENABLED")
@@ -208,28 +214,26 @@ func (c *Config) Validate() error {
 		return fmt.Errorf("garage admin_token is required")
 	}
 
-	// Validate auth mode
-	if c.Auth.Mode != "none" && c.Auth.Mode != "basic" && c.Auth.Mode != "oidc" {
-		return fmt.Errorf("auth mode must be 'none', 'basic', or 'oidc', got: %s", c.Auth.Mode)
-	}
-
-	// Validate basic auth if enabled
-	if c.Auth.Mode == "basic" {
-		if c.Auth.Basic.Username == "" || c.Auth.Basic.Password == "" {
-			return fmt.Errorf("basic auth username and password are required when auth mode is 'basic'")
+	// Validate admin auth if enabled
+	if c.Auth.Admin.Enabled {
+		if c.Auth.Admin.Username == "" || c.Auth.Admin.Password == "" {
+			return fmt.Errorf("admin auth username and password are required when admin auth is enabled")
 		}
 	}
 
 	// Validate OIDC config if enabled
-	if c.Auth.Mode == "oidc" {
+	if c.Auth.OIDC.Enabled {
 		if c.Auth.OIDC.ClientID == "" {
-			return fmt.Errorf("oidc client_id is required when auth mode is 'oidc'")
+			return fmt.Errorf("oidc client_id is required when oidc is enabled")
 		}
 		if c.Auth.OIDC.IssuerURL == "" {
-			return fmt.Errorf("oidc issuer_url is required when auth mode is 'oidc'")
+			return fmt.Errorf("oidc issuer_url is required when oidc is enabled")
+		}
+		if c.Server.RootURL == "" {
+			return fmt.Errorf("server.root_url is required when oidc is enabled")
 		}
 		if len(c.Auth.OIDC.Scopes) == 0 {
-			return fmt.Errorf("oidc scopes are required when auth mode is 'oidc'")
+			return fmt.Errorf("oidc scopes are required when oidc is enabled")
 		}
 	}
 

backend/internal/handlers/auth.go

@@ -0,0 +1,152 @@
+package handlers
+
+import (
+	"Noooste/garage-ui/internal/auth"
+	"Noooste/garage-ui/internal/config"
+	"Noooste/garage-ui/internal/models"
+
+	"github.com/gofiber/fiber/v3"
+)
+
+// AuthHandler handles authentication-related requests
+type AuthHandler struct {
+	cfg         *config.Config
+	authService *auth.AuthService
+}
+
+// NewAuthHandler creates a new auth handler
+func NewAuthHandler(cfg *config.Config, authService *auth.AuthService) *AuthHandler {
+	return &AuthHandler{
+		cfg:         cfg,
+		authService: authService,
+	}
+}
+
+// GetAuthConfig returns the current authentication configuration
+// @Summary Get authentication configuration
+// @Description Returns the current auth configuration (admin and/or OIDC)
+// @Tags auth
+// @Produce json
+// @Success 200 {object} object{admin=object,oidc=object} "Auth config"
+// @Router /auth/config [get]
+func (h *AuthHandler) GetAuthConfig(c fiber.Ctx) error {
+	response := fiber.Map{
+		"admin": fiber.Map{
+			"enabled": h.cfg.Auth.Admin.Enabled,
+		},
+		"oidc": fiber.Map{
+			"enabled": h.cfg.Auth.OIDC.Enabled,
+		},
+	}
+
+	// Add provider name if OIDC is enabled
+	if h.cfg.Auth.OIDC.Enabled {
+		provider := h.cfg.Auth.OIDC.ProviderName
+		if provider == "" {
+			provider = "OIDC Provider"
+		}
+		response["oidc"].(fiber.Map)["provider"] = provider
+	}
+
+	return c.JSON(response)
+}
+
+// LoginBasicRequest represents the basic auth login request
+type LoginBasicRequest struct {
+	Username string `json:"username" validate:"required"`
+	Password string `json:"password" validate:"required"`
+}
+
+// LoginAdmin handles admin authentication login
+// @Summary Admin auth login
+// @Description Authenticate with admin username and password, returns JWT token
+// @Tags auth
+// @Accept json
+// @Produce json
+// @Param credentials body LoginBasicRequest true "Login credentials"
+// @Success 200 {object} object{success=bool,token=string,user=object} "Login successful"
+// @Failure 400 {object} models.APIResponse "Invalid request"
+// @Failure 401 {object} models.APIResponse "Invalid credentials"
+// @Router /auth/login [post]
+func (h *AuthHandler) LoginAdmin(c fiber.Ctx) error {
+	// Parse request body
+	var req LoginBasicRequest
+	if err := c.Bind().JSON(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(
+			models.ErrorResponse(models.ErrCodeBadRequest, "Invalid request body"),
+		)
+	}
+
+	// Validate credentials against admin config
+	if req.Username != h.cfg.Auth.Admin.Username || req.Password != h.cfg.Auth.Admin.Password {
+		return c.Status(fiber.StatusUnauthorized).JSON(
+			models.ErrorResponse(models.ErrCodeUnauthorized, "Invalid credentials"),
+		)
+	}
+
+	// Create user info object
+	userInfo := &auth.UserInfo{
+		Username: req.Username,
+	}
+
+	// Generate JWT session token
+	sessionToken, err := h.authService.GenerateSessionToken(userInfo)
+	if err != nil {
+		return c.Status(fiber.StatusInternalServerError).JSON(
+			models.ErrorResponse(models.ErrCodeInternalError, "Failed to create session"),
+		)
+	}
+
+	return c.JSON(fiber.Map{
+		"success": true,
+		"token":   sessionToken,
+		"user": fiber.Map{
+			"username": userInfo.Username,
+		},
+	})
+}
+
+// GetMe returns the current authenticated user's information
+// @Summary Get current user
+// @Description Returns information about the currently authenticated user
+// @Tags auth
+// @Produce json
+// @Security ApiKeyAuth
+// @Success 200 {object} object{success=bool,user=object} "User information"
+// @Failure 401 {object} models.APIResponse "Not authenticated"
+// @Router /auth/me [get]
+func (h *AuthHandler) GetMe(c fiber.Ctx) error {
+	// Try to get user info from OIDC context
+	userInfoInterface := c.Locals("userInfo")
+	if userInfoInterface != nil {
+		userInfo, ok := userInfoInterface.(*auth.UserInfo)
+		if ok {
+			return c.JSON(fiber.Map{
+				"success": true,
+				"user": fiber.Map{
+					"username": userInfo.Username,
+					"email":    userInfo.Email,
+					"name":     userInfo.Name,
+				},
+			})
+		}
+	}
+
+	// Try to get username from basic auth context
+	usernameInterface := c.Locals("username")
+	if usernameInterface != nil {
+		username, ok := usernameInterface.(string)
+		if ok {
+			return c.JSON(fiber.Map{
+				"success": true,
+				"user": fiber.Map{
+					"username": username,
+				},
+			})
+		}
+	}
+
+	return c.Status(fiber.StatusUnauthorized).JSON(
+		models.ErrorResponse(models.ErrCodeUnauthorized, "Not authenticated"),
+	)
+}

backend/internal/middleware/auth.go

@@ -9,94 +9,63 @@ import (
 )
 
 // AuthMiddleware returns a Fiber middleware for authentication
-// It handles different auth modes: none, basic, and OIDC
+// It handles multiple auth methods: admin and OIDC
 func AuthMiddleware(cfg *config.AuthConfig, authService *auth.AuthService) fiber.Handler {
 	return func(c fiber.Ctx) error {
-		// If auth mode is "none", allow all requests
-		if cfg.Mode == "none" {
+		// If no auth is enabled, allow all requests
+		if !cfg.Admin.Enabled && !cfg.OIDC.Enabled {
 			return c.Next()
 		}
 
-		// Handle basic authentication
-		if cfg.Mode == "basic" {
-			return handleBasicAuth(c, authService)
+		// Get Authorization header
+		authHeader := c.Get("Authorization")
+
+		// Try admin auth if enabled and header is present
+		if cfg.Admin.Enabled && authHeader != "" {
+			// Check if it's a Bearer token (JWT from admin login)
+			if len(authHeader) > 7 && authHeader[:7] == "Bearer " {
+				token := authHeader[7:]
+
+				// Validate JWT session token
+				userInfo, err := authService.ValidateSessionToken(token)
+				if err == nil {
+					// Valid admin token
+					c.Locals("userInfo", userInfo)
+					c.Locals("username", userInfo.Username)
+					if userInfo.Email != "" {
+						c.Locals("email", userInfo.Email)
+					}
+					return c.Next()
+				}
+			}
 		}
 
-		// Handle OIDC authentication
-		if cfg.Mode == "oidc" {
-			return handleOIDCAuth(c, authService, &cfg.OIDC)
+		// Try OIDC auth if enabled
+		if cfg.OIDC.Enabled {
+			sessionCookie := c.Cookies(cfg.OIDC.CookieName)
+			if sessionCookie != "" {
+				// Validate JWT session token from cookie
+				userInfo, err := authService.ValidateSessionToken(sessionCookie)
+				if err == nil {
+					// Valid OIDC token
+					c.Locals("userInfo", userInfo)
+					c.Locals("username", userInfo.Username)
+					c.Locals("email", userInfo.Email)
+					return c.Next()
+				}
+			}
 		}
 
-		// Unknown auth mode - deny access
-		return c.Status(fiber.StatusUnauthorized).JSON(
-			models.ErrorResponse(models.ErrCodeUnauthorized, "Invalid authentication mode"),
-		)
-	}
-}
-
-// handleBasicAuth validates basic authentication credentials
-func handleBasicAuth(c fiber.Ctx, authService *auth.AuthService) error {
-	// Get Authorization header
-	authHeader := c.Get("Authorization")
-	if authHeader == "" {
-		c.Set("WWW-Authenticate", `Basic realm="Restricted"`)
-		return c.Status(fiber.StatusUnauthorized).JSON(
-			models.ErrorResponse(models.ErrCodeUnauthorized, "Authorization header required"),
-		)
-	}
-
-	// Parse basic auth credentials
-	username, password, ok := auth.ParseBasicAuth(authHeader)
-	if !ok {
-		c.Set("WWW-Authenticate", `Basic realm="Restricted"`)
-		return c.Status(fiber.StatusUnauthorized).JSON(
-			models.ErrorResponse(models.ErrCodeUnauthorized, "Invalid Authorization header format"),
-		)
-	}
-
-	// Validate credentials
-	if !authService.ValidateBasicAuth(username, password) {
-		c.Set("WWW-Authenticate", `Basic realm="Restricted"`)
-		return c.Status(fiber.StatusUnauthorized).JSON(
-			models.ErrorResponse(models.ErrCodeUnauthorized, "Invalid credentials"),
-		)
-	}
-
-	// Store username in context for later use
-	c.Locals("username", username)
-
-	return c.Next()
-}
-
-// handleOIDCAuth validates OIDC session/token
-func handleOIDCAuth(c fiber.Ctx, authService *auth.AuthService, oidcCfg *config.OIDCConfig) error {
-	// Get session cookie
-	sessionCookie := c.Cookies(oidcCfg.CookieName)
-	if sessionCookie == "" {
+		// No valid authentication found
 		return c.Status(fiber.StatusUnauthorized).JSON(
 			models.ErrorResponse(models.ErrCodeUnauthorized, "Authentication required"),
 		)
 	}
-
-	// Validate JWT session token
-	userInfo, err := authService.ValidateSessionToken(sessionCookie)
-	if err != nil {
-		return c.Status(fiber.StatusUnauthorized).JSON(
-			models.ErrorResponse(models.ErrCodeUnauthorized, "Invalid or expired session"),
-		)
-	}
-
-	// Store user info in context for handlers to use
-	c.Locals("userInfo", userInfo)
-	c.Locals("username", userInfo.Username)
-	c.Locals("email", userInfo.Email)
-
-	return c.Next()
 }
 
 func RequireAuth(cfg *config.AuthConfig) fiber.Handler {
 	return func(c fiber.Ctx) error {
-		if cfg.Mode == "none" {
+		if !cfg.Admin.Enabled && !cfg.OIDC.Enabled {
 			return c.Status(fiber.StatusForbidden).JSON(
 				models.ErrorResponse(models.ErrCodeForbidden, "Authentication is required but not configured"),
 			)

backend/internal/routes/routes.go

@@ -39,6 +39,12 @@ func SetupRoutes(
 	// Swagger documentation endpoint (no auth required)
 	app.Get("/docs/*", swagger.HandlerDefault)
 
+	// Create auth handler
+	authHandler := handlers.NewAuthHandler(cfg, authService)
+
+	// Auth configuration endpoint (always accessible, no auth required)
+	app.Get("/auth/config", authHandler.GetAuthConfig)
+
 	// API v1 group
 	api := app.Group("/api/v1")
 
@@ -97,12 +103,22 @@ func SetupRoutes(
 		monitoring.Get("/dashboard", monitoringHandler.GetDashboardMetrics) // Get dashboard metrics
 	}
 
+	// Admin auth login endpoint (only if admin is enabled)
+	if cfg.Auth.Admin.Enabled {
+		app.Post("/auth/login", authHandler.LoginAdmin)
+	}
+
+	// Auth "me" endpoint (if any auth is enabled)
+	if cfg.Auth.Admin.Enabled || cfg.Auth.OIDC.Enabled {
+		app.Get("/auth/me", middleware.AuthMiddleware(&cfg.Auth, authService), authHandler.GetMe)
+	}
+
 	// OIDC authentication routes (only if OIDC is enabled)
-	if cfg.Auth.Mode == "oidc" && cfg.Auth.OIDC.Enabled {
-		authRoutes := app.Group("/auth")
+	if cfg.Auth.OIDC.Enabled {
+		oidcRoutes := app.Group("/auth/oidc")
 		{
 			// Login endpoint - redirects to OIDC provider
-			authRoutes.Get("/login", func(c fiber.Ctx) error {
+			oidcRoutes.Get("/login", func(c fiber.Ctx) error {
 				state, err := authService.GenerateStateToken()
 				if err != nil {
 					return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
@@ -120,7 +136,7 @@ func SetupRoutes(
 			})
 
 			// Callback endpoint - handles OIDC redirect after login
-			authRoutes.Get("/callback", func(c fiber.Ctx) error {
+			oidcRoutes.Get("/callback", func(c fiber.Ctx) error {
 				// Get and validate state token
 				state := c.Query("state")
 				if !authService.ValidateAndConsumeState(state) {
@@ -180,14 +196,12 @@ func SetupRoutes(
 					SameSite: cfg.Auth.OIDC.CookieSameSite,
 				})
 
-				return c.JSON(fiber.Map{
-					"success": true,
-					"user":    userInfo,
-				})
+				// Redirect to frontend with success indicator
+				return c.Redirect().To("/?login=success")
 			})
 
 			// Logout endpoint
-			authRoutes.Post("/logout", func(c fiber.Ctx) error {
+			oidcRoutes.Post("/logout", func(c fiber.Ctx) error {
 				// Clear session cookie
 				c.Cookie(&fiber.Cookie{
 					Name:   cfg.Auth.OIDC.CookieName,
@@ -200,21 +214,6 @@ func SetupRoutes(
 					"message": "Logged out successfully",
 				})
 			})
-
-			// User info endpoint
-			authRoutes.Get("/me", middleware.AuthMiddleware(&cfg.Auth, authService), func(c fiber.Ctx) error {
-				userInfo := c.Locals("userInfo")
-				if userInfo == nil {
-					return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{
-						"error": "Not authenticated",
-					})
-				}
-
-				return c.JSON(fiber.Map{
-					"success": true,
-					"user":    userInfo,
-				})
-			})
 		}
 	}
 
@@ -227,6 +226,7 @@ func SetupRoutes(
 			path := c.Path()
 
 			if strings.HasPrefix(path, "/api/") ||
+				strings.HasPrefix(path, "/auth") ||
 				strings.HasPrefix(path, "/health") ||
 				strings.HasPrefix(path, "/docs") {
 				fmt.Println("API or health check route, skipping SPA fallback:", path)

backend/internal/services/garage_admin.go

@@ -3,6 +3,7 @@ package services
 import (
 	"Noooste/garage-ui/internal/config"
 	"Noooste/garage-ui/internal/models"
+	"Noooste/garage-ui/pkg/utils"
 	"context"
 	"encoding/json"
 	"fmt"
@@ -31,17 +32,30 @@ func NewGarageAdminService(cfg *config.GarageConfig) *GarageAdminService {
 	}
 }
 
-// doRequest performs an HTTP request to the Admin API
+// doRequest performs an HTTP request to the Admin API with retry logic for connection refused errors
 func (s *GarageAdminService) doRequest(ctx context.Context, method, path string, body interface{}) (*azuretls.Response, error) {
-	return s.httpClient.Do(&azuretls.Request{
-		Method:     method,
-		Url:        s.baseURL + path,
-		Body:       body,
-		IgnoreBody: true, // decodeResponse will handle body reading
-		OrderedHeaders: azuretls.OrderedHeaders{
-			{"Authorization", fmt.Sprintf("Bearer %s", s.token)},
-		},
-	}, ctx)
+	var resp *azuretls.Response
+
+	retryConfig := utils.DefaultRetryConfig()
+	err := utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		var reqErr error
+		resp, reqErr = s.httpClient.Do(&azuretls.Request{
+			Method:     method,
+			Url:        s.baseURL + path,
+			Body:       body,
+			IgnoreBody: true, // decodeResponse will handle body reading
+			OrderedHeaders: azuretls.OrderedHeaders{
+				{"Authorization", fmt.Sprintf("Bearer %s", s.token)},
+			},
+		}, ctx)
+		return reqErr
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	return resp, nil
 }
 
 // decodeResponse decodes a JSON response into the target structure

backend/internal/services/s3.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"net/url"
 	"strings"
 	"time"
 
@@ -122,8 +123,15 @@ func (s *S3Service) getMinioClient(ctx context.Context, bucketName string) (*min
 
 // ListBuckets retrieves all buckets from Garage
 func (s *S3Service) ListBuckets(ctx context.Context) (*models.BucketListResponse, error) {
-	// Call MinIO ListBuckets API
-	bucketInfos, err := s.client.ListBuckets(ctx)
+	var bucketInfos []minio.BucketInfo
+
+	// Call MinIO ListBuckets API with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err := utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		var listErr error
+		bucketInfos, listErr = s.client.ListBuckets(ctx)
+		return listErr
+	})
 	if err != nil {
 		return nil, fmt.Errorf("failed to list buckets: %w", err)
 	}
@@ -150,9 +158,12 @@ func (s *S3Service) CreateBucket(ctx context.Context, bucketName string) error {
 		return fmt.Errorf("failed to get MinIO client for bucket %s: %w", bucketName, err)
 	}
 
-	// Call MinIO MakeBucket API
-	err = client.MakeBucket(ctx, bucketName, minio.MakeBucketOptions{
-		Region: s.config.Region,
+	// Call MinIO MakeBucket API with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err = utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		return client.MakeBucket(ctx, bucketName, minio.MakeBucketOptions{
+			Region: s.config.Region,
+		})
 	})
 	if err != nil {
 		return fmt.Errorf("failed to create bucket %s: %w", bucketName, err)
@@ -168,8 +179,11 @@ func (s *S3Service) DeleteBucket(ctx context.Context, bucketName string) error {
 		return fmt.Errorf("failed to get MinIO client for bucket %s: %w", bucketName, err)
 	}
 
-	// Call MinIO RemoveBucket API
-	err = client.RemoveBucket(ctx, bucketName)
+	// Call MinIO RemoveBucket API with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err = utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		return client.RemoveBucket(ctx, bucketName)
+	})
 	if err != nil {
 		return fmt.Errorf("failed to delete bucket %s: %w", bucketName, err)
 	}
@@ -273,8 +287,15 @@ func (s *S3Service) UploadObject(ctx context.Context, bucketName, key string, bo
 		ContentType: contentType,
 	}
 
-	// Call MinIO PutObject API
-	info, err := client.PutObject(ctx, bucketName, key, body, -1, opts)
+	var info minio.UploadInfo
+
+	// Call MinIO PutObject API with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err = utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		var uploadErr error
+		info, uploadErr = client.PutObject(ctx, bucketName, key, body, -1, opts)
+		return uploadErr
+	})
 	if err != nil {
 		return nil, fmt.Errorf("failed to upload object %s to bucket %s: %w", key, bucketName, err)
 	}
@@ -290,8 +311,15 @@ func (s *S3Service) UploadObject(ctx context.Context, bucketName, key string, bo
 
 // GetObject retrieves an object from a bucket
 func (s *S3Service) GetObject(ctx context.Context, bucketName, key string) (io.ReadCloser, *models.ObjectInfo, error) {
-	// Call MinIO GetObject API
-	object, err := s.client.GetObject(ctx, bucketName, key, minio.GetObjectOptions{})
+	var object *minio.Object
+
+	// Call MinIO GetObject API with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err := utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		var getErr error
+		object, getErr = s.client.GetObject(ctx, bucketName, key, minio.GetObjectOptions{})
+		return getErr
+	})
 	if err != nil {
 		return nil, nil, fmt.Errorf("failed to get object %s from bucket %s: %w", key, bucketName, err)
 	}
@@ -317,8 +345,11 @@ func (s *S3Service) GetObject(ctx context.Context, bucketName, key string) (io.R
 
 // DeleteObject deletes an object from a bucket
 func (s *S3Service) DeleteObject(ctx context.Context, bucketName, key string) error {
-	// Call MinIO RemoveObject API
-	err := s.client.RemoveObject(ctx, bucketName, key, minio.RemoveObjectOptions{})
+	// Call MinIO RemoveObject API with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err := utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		return s.client.RemoveObject(ctx, bucketName, key, minio.RemoveObjectOptions{})
+	})
 	if err != nil {
 		return fmt.Errorf("failed to delete object %s from bucket %s: %w", key, bucketName, err)
 	}
@@ -334,7 +365,15 @@ func (s *S3Service) ObjectExists(ctx context.Context, bucketName, key string) (b
 		return false, fmt.Errorf("failed to get MinIO client for bucket %s: %w", bucketName, err)
 	}
 
-	_, err = client.StatObject(ctx, bucketName, key, minio.StatObjectOptions{})
+	var statErr error
+
+	// Call MinIO StatObject API with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err = utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		_, statErr = client.StatObject(ctx, bucketName, key, minio.StatObjectOptions{})
+		return statErr
+	})
+
 	if err != nil {
 		// Check if error is "object not found"
 		errResponse := minio.ToErrorResponse(err)
@@ -354,7 +393,15 @@ func (s *S3Service) GetObjectMetadata(ctx context.Context, bucketName, key strin
 		return nil, fmt.Errorf("failed to get MinIO client for bucket %s: %w", bucketName, err)
 	}
 
-	stat, err := client.StatObject(ctx, bucketName, key, minio.StatObjectOptions{})
+	var stat minio.ObjectInfo
+
+	// Call MinIO StatObject API with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err = utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		var statErr error
+		stat, statErr = client.StatObject(ctx, bucketName, key, minio.StatObjectOptions{})
+		return statErr
+	})
 	if err != nil {
 		return nil, fmt.Errorf("failed to get metadata for object %s in bucket %s: %w", key, bucketName, err)
 	}
@@ -415,8 +462,15 @@ func (s *S3Service) GetPresignedURL(ctx context.Context, bucketName, key string,
 		return "", fmt.Errorf("failed to get MinIO client for bucket %s: %w", bucketName, err)
 	}
 
-	// Generate presigned GET URL
-	presignedURL, err := client.PresignedGetObject(ctx, bucketName, key, expiresIn, nil)
+	var presignedURL *url.URL
+
+	// Generate presigned GET URL with retry logic
+	retryConfig := utils.DefaultRetryConfig()
+	err = utils.RetryWithBackoff(ctx, retryConfig, func() error {
+		var presignErr error
+		presignedURL, presignErr = client.PresignedGetObject(ctx, bucketName, key, expiresIn, nil)
+		return presignErr
+	})
 	if err != nil {
 		return "", fmt.Errorf("failed to generate presigned URL for %s/%s: %w", bucketName, key, err)
 	}

backend/main.go

@@ -25,9 +25,6 @@ import (
 //	@description	This API provides endpoints for managing buckets, objects, users, and cluster operations.
 //	@termsOfService	http://swagger.io/terms/
 
-//	@contact.name	API Support
-//	@contact.email	support@garage-ui.io
-
 //	@license.name	MIT
 //	@license.url	https://opensource.org/licenses/MIT
 
@@ -81,8 +78,19 @@ func main() {
 	log.Println("Initializing S3 service...")
 	s3Service := services.NewS3Service(&cfg.Garage, adminService)
 
-	log.Printf("Initializing authentication service (mode: %s)...", cfg.Auth.Mode)
-	authService, err := auth.NewAuthService(&cfg.Auth)
+	// Determine enabled auth methods for logging
+	authMethods := []string{}
+	if cfg.Auth.Admin.Enabled {
+		authMethods = append(authMethods, "admin")
+	}
+	if cfg.Auth.OIDC.Enabled {
+		authMethods = append(authMethods, "oidc")
+	}
+	if len(authMethods) == 0 {
+		authMethods = append(authMethods, "none")
+	}
+	log.Printf("Initializing authentication service (enabled: %v)...", authMethods)
+	authService, err := auth.NewAuthService(&cfg.Auth, &cfg.Server)
 	if err != nil {
 		log.Fatalf("Failed to initialize auth service: %v", err)
 	}

backend/pkg/utils/retry.go

@@ -0,0 +1,104 @@
+package utils
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"syscall"
+	"time"
+)
+
+// RetryConfig configures retry behavior
+type RetryConfig struct {
+	MaxRetries     int
+	InitialBackoff time.Duration
+	MaxBackoff     time.Duration
+	BackoffFactor  float64
+}
+
+// DefaultRetryConfig returns default retry configuration
+func DefaultRetryConfig() RetryConfig {
+	return RetryConfig{
+		MaxRetries:     3,
+		InitialBackoff: 100 * time.Millisecond,
+		MaxBackoff:     5 * time.Second,
+		BackoffFactor:  2.0,
+	}
+}
+
+// IsConnectionRefused checks if the error is a connection refused error
+func IsConnectionRefused(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	// Check for connection refused error
+	var opErr *net.OpError
+	if errors.As(err, &opErr) {
+		// Check if it's a connection refused error
+		if opErr.Op == "dial" || opErr.Op == "read" {
+			var syscallErr *syscall.Errno
+			if errors.As(opErr.Err, &syscallErr) {
+				return *syscallErr == syscall.ECONNREFUSED
+			}
+		}
+	}
+
+	// Also check for "connection refused" in error message as fallback
+	if errors.Is(err, syscall.ECONNREFUSED) {
+		return true
+	}
+
+	return false
+}
+
+// RetryWithBackoff executes a function with exponential backoff on connection refused errors
+func RetryWithBackoff(ctx context.Context, config RetryConfig, fn func() error) error {
+	var lastErr error
+
+	for attempt := 0; attempt <= config.MaxRetries; attempt++ {
+		// Execute the function
+		err := fn()
+		if err == nil {
+			return nil
+		}
+
+		lastErr = err
+
+		// If it's not a connection refused error, don't retry
+		if !IsConnectionRefused(err) {
+			return err
+		}
+
+		// If this was the last attempt, return the error
+		if attempt == config.MaxRetries {
+			return fmt.Errorf("max retries (%d) exceeded: %w", config.MaxRetries, err)
+		}
+
+		// Calculate backoff duration with exponential increase
+		backoff := time.Duration(float64(config.InitialBackoff) * pow(config.BackoffFactor, float64(attempt)))
+		if backoff > config.MaxBackoff {
+			backoff = config.MaxBackoff
+		}
+
+		// Wait with context cancellation support
+		select {
+		case <-ctx.Done():
+			return fmt.Errorf("context cancelled during retry: %w", ctx.Err())
+		case <-time.After(backoff):
+			// Continue to next attempt
+		}
+	}
+
+	return lastErr
+}
+
+// pow is a simple integer exponentiation helper
+func pow(base float64, exp float64) float64 {
+	result := 1.0
+	for i := 0; i < int(exp); i++ {
+		result *= base
+	}
+	return result
+}