feat: oidc support OIDC_LOGOUT_URL

internal/api/handler.go

@@ -46,7 +46,7 @@ func NewHandler(cfg config.ConfigInstance) http.Handler {
 			}
 		})
 		mux.HandleFunc("GET,POST", "/v1/auth/callback", defaultAuth.LoginCallbackHandler)
-		mux.HandleFunc("GET,POST", "/v1/auth/logout", auth.LogoutCallbackHandler(defaultAuth))
+		mux.HandleFunc("GET,POST", "/v1/auth/logout", defaultAuth.LogoutCallbackHandler)
 	} else {
 		mux.HandleFunc("GET", "/v1/auth/check", func(w http.ResponseWriter, r *http.Request) {
 			w.WriteHeader(http.StatusOK)

internal/api/v1/auth/oidc.go

@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
+	"net/url"
 	"slices"
 	"time"
 
@@ -23,6 +24,7 @@ type OIDCProvider struct {
 	oauthConfig   *oauth2.Config
 	oidcProvider  *oidc.Provider
 	oidcVerifier  *oidc.IDTokenVerifier
+	oidcLogoutURL *url.URL
 	allowedUsers  []string
 	allowedGroups []string
 	isMiddleware  bool
@@ -35,11 +37,20 @@ const (
 	OIDCLogoutPath             = "/auth/logout"
 )
 
-func NewOIDCProvider(issuerURL, clientID, clientSecret, redirectURL string, allowedUsers, allowedGroups []string) (*OIDCProvider, error) {
+func NewOIDCProvider(issuerURL, clientID, clientSecret, redirectURL, logoutURL string, allowedUsers, allowedGroups []string) (*OIDCProvider, error) {
 	if len(allowedUsers)+len(allowedGroups) == 0 {
 		return nil, errors.New("OIDC users, groups, or both must not be empty")
 	}
 
+	var logout *url.URL
+	var err error
+	if logoutURL != "" {
+		logout, err = url.Parse(logoutURL)
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse logout URL: %w", err)
+		}
+	}
+
 	provider, err := oidc.NewProvider(context.Background(), issuerURL)
 	if err != nil {
 		return nil, fmt.Errorf("failed to initialize OIDC provider: %w", err)
@@ -57,6 +68,7 @@ func NewOIDCProvider(issuerURL, clientID, clientSecret, redirectURL string, allo
 		oidcVerifier: provider.Verifier(&oidc.Config{
 			ClientID: clientID,
 		}),
+		oidcLogoutURL: logout,
 		allowedUsers:  allowedUsers,
 		allowedGroups: allowedGroups,
 	}, nil
@@ -69,6 +81,7 @@ func NewOIDCProviderFromEnv() (*OIDCProvider, error) {
 		common.OIDCClientID,
 		common.OIDCClientSecret,
 		common.OIDCRedirectURL,
+		common.OIDCLogoutURL,
 		common.OIDCAllowedUsers,
 		common.OIDCAllowedGroups,
 	)
@@ -222,6 +235,25 @@ func (auth *OIDCProvider) LoginCallbackHandler(w http.ResponseWriter, r *http.Re
 	http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
 }
 
+func (auth *OIDCProvider) LogoutCallbackHandler(w http.ResponseWriter, r *http.Request) {
+	if auth.oidcLogoutURL == nil {
+		DefaultLogoutCallbackHandler(auth, w, r)
+		return
+	}
+
+	token, err := r.Cookie(auth.TokenCookieName())
+	if err != nil {
+		U.HandleErr(w, r, E.New("missing token cookie"), http.StatusBadRequest)
+		return
+	}
+	clearTokenCookie(w, r, auth.TokenCookieName())
+
+	logoutURL := *auth.oidcLogoutURL
+	logoutURL.Query().Add("id_token_hint", token.Value)
+
+	http.Redirect(w, r, logoutURL.String(), http.StatusFound)
+}
+
 // handleTestCallback handles OIDC callback in test environment.
 func (auth *OIDCProvider) handleTestCallback(w http.ResponseWriter, r *http.Request) {
 	state, err := r.Cookie(CookieOauthState)

internal/api/v1/auth/oidc_test.go

@@ -115,7 +115,7 @@ func setupProvider(t *testing.T) *provider {
 	}
 }
 
-// buildRSAJWK is a helper to construct a minimal JWK for the JWKS endpoint
+// buildRSAJWK is a helper to construct a minimal JWK for the JWKS endpoint.
 func buildRSAJWK(t *testing.T, pub *rsa.PublicKey, kid string) map[string]any {
 	t.Helper()
 
@@ -257,17 +257,13 @@ func TestInitOIDC(t *testing.T) {
 		clientID      string
 		clientSecret  string
 		redirectURL   string
+		logoutURL     string
 		allowedUsers  []string
 		allowedGroups []string
 		wantErr       bool
 	}{
 		{
 			name:    "Fail - Empty configuration",
-			issuerURL:    "",
-			clientID:     "",
-			clientSecret: "",
-			redirectURL:  "",
-			allowedUsers: nil,
 			wantErr: true,
 		},
 		{
@@ -288,6 +284,17 @@ func TestInitOIDC(t *testing.T) {
 			allowedGroups: []string{"group1", "group2"},
 			wantErr:       false,
 		},
+		{
+			name:          "Success - Valid configuration with users, groups and logout URL",
+			issuerURL:     server.URL,
+			clientID:      "client_id",
+			clientSecret:  "client_secret",
+			redirectURL:   "https://example.com/callback",
+			logoutURL:     "https://example.com/logout",
+			allowedUsers:  []string{"user1", "user2"},
+			allowedGroups: []string{"group1", "group2"},
+			wantErr:       false,
+		},
 		{
 			name:         "Fail - No allowed users or allowed groups",
 			issuerURL:    "https://example.com",
@@ -300,7 +307,7 @@ func TestInitOIDC(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			_, err := NewOIDCProvider(tt.issuerURL, tt.clientID, tt.clientSecret, tt.redirectURL, tt.allowedUsers, tt.allowedGroups)
+			_, err := NewOIDCProvider(tt.issuerURL, tt.clientID, tt.clientSecret, tt.redirectURL, tt.logoutURL, tt.allowedUsers, tt.allowedGroups)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("InitOIDC() error = %v, wantErr %v", err, tt.wantErr)
 			}

internal/api/v1/auth/provider.go

@@ -9,4 +9,5 @@ type Provider interface {
 	CheckToken(r *http.Request) error
 	RedirectLoginPage(w http.ResponseWriter, r *http.Request)
 	LoginCallbackHandler(w http.ResponseWriter, r *http.Request)
+	LogoutCallbackHandler(w http.ResponseWriter, r *http.Request)
 }

internal/api/v1/auth/userpass.go

@@ -128,6 +128,10 @@ func (auth *UserPassAuth) LoginCallbackHandler(w http.ResponseWriter, r *http.Re
 	w.WriteHeader(http.StatusOK)
 }
 
+func (auth *UserPassAuth) LogoutCallbackHandler(w http.ResponseWriter, r *http.Request) {
+	DefaultLogoutCallbackHandler(auth, w, r)
+}
+
 func (auth *UserPassAuth) validatePassword(user, pass string) error {
 	if user != auth.username {
 		return ErrInvalidUsername.Subject(user)

internal/api/v1/auth/utils.go

@@ -62,9 +62,8 @@ func clearTokenCookie(w http.ResponseWriter, r *http.Request, name string) {
 	})
 }
 
-func LogoutCallbackHandler(auth Provider) http.HandlerFunc {
+// DefaultLogoutCallbackHandler clears the token cookie and redirects to the login page..
-	return func(w http.ResponseWriter, r *http.Request) {
+func DefaultLogoutCallbackHandler(auth Provider, w http.ResponseWriter, r *http.Request) {
 	clearTokenCookie(w, r, auth.TokenCookieName())
 	auth.RedirectLoginPage(w, r)
-	}
 }

internal/common/env.go

@@ -51,6 +51,7 @@ var (
 
 	// OIDC Configuration.
 	OIDCIssuerURL     = GetEnvString("OIDC_ISSUER_URL", "")
+	OIDCLogoutURL     = GetEnvString("OIDC_LOGOUT_URL", "")
 	OIDCClientID      = GetEnvString("OIDC_CLIENT_ID", "")
 	OIDCClientSecret  = GetEnvString("OIDC_CLIENT_SECRET", "")
 	OIDCRedirectURL   = GetEnvString("OIDC_REDIRECT_URL", "")

internal/net/http/middleware/oidc.go

@@ -13,7 +13,6 @@ type oidcMiddleware struct {
 
 	auth    auth.Provider
 	authMux *http.ServeMux
-	logoutHandler http.HandlerFunc
 }
 
 var OIDC = NewMiddleware[oidcMiddleware]()
@@ -41,7 +40,6 @@ func (amw *oidcMiddleware) finalize() error {
 		http.Error(w, "Unauthorized", http.StatusUnauthorized)
 	})
 	amw.authMux.HandleFunc("/", authProvider.RedirectLoginPage)
-	amw.logoutHandler = auth.LogoutCallbackHandler(authProvider)
 	amw.auth = authProvider
 	return nil
 }
@@ -52,7 +50,7 @@ func (amw *oidcMiddleware) before(w http.ResponseWriter, r *http.Request) (proce
 		return false
 	}
 	if r.URL.Path == auth.OIDCLogoutPath {
-		amw.logoutHandler(w, r)
+		amw.auth.LogoutCallbackHandler(w, r)
 		return false
 	}
 	return true

internal/route/provider/docker_test.go

@@ -130,7 +130,6 @@ func TestApplyLabel(t *testing.T) {
 	ExpectEqual(t, b.Container.StopSignal, "SIGTERM")
 
 	ExpectEqual(t, a.Homepage.Show, true)
-	ExpectEqual(t, a.Homepage.Hide, false)
 	ExpectEqual(t, a.Homepage.Icon.Value, "png/adguard-home.png")
 	ExpectEqual(t, a.Homepage.Icon.Extra.FileType, "png")
 	ExpectEqual(t, a.Homepage.Icon.Extra.Name, "adguard-home")

next-release.md

@@ -92,6 +92,8 @@ GoDoxy v0.9.0 expected changes
   - `GODOXY_OIDC_ISSUER_URL` e.g.:
     - Pocket ID: `https://pocker-id.yourdomain.com`
     - Authentik: `https://authentik.yourdomain.com/application/o/<application_slug>/` **The ending slash is required**
+  - `GODOXY_OIDC_LOGOUT_URL` _(if your issuer supports it, e.g.)_
+    - Authentik: `https://authentik.yourdomain.com/application/o/<application_slug>/end-session`
   - `GODOXY_OIDC_CLIENT_ID`
   - `GODOXY_OIDC_CLIENT_SECRET`
   - `GODOXY_OIDC_REDIRECT_URL`