feat: add ldap support

cmd/root.go

@@ -13,6 +13,7 @@
 	"tinyauth/internal/docker"
 	"tinyauth/internal/handlers"
 	"tinyauth/internal/hooks"
+	"tinyauth/internal/ldap"
 	"tinyauth/internal/providers"
 	"tinyauth/internal/server"
 	"tinyauth/internal/types"
@@ -58,10 +59,6 @@
 		users, err := utils.GetUsers(config.Users, config.UsersFile)
 		HandleError(err, "Failed to parse users")
 
-		if len(users) == 0 && !utils.OAuthConfigured(config) {
-			HandleError(errors.New("no users or OAuth configured"), "No users or OAuth configured")
-		}
-
 		// Get domain
 		log.Debug().Msg("Getting domain")
 		domain, err := utils.GetUpperDomain(config.AppURL)
@@ -143,8 +140,35 @@
 		docker, err := docker.NewDocker()
 		HandleError(err, "Failed to initialize docker")
 
+		// Create LDAP service if configured
+		var ldapService *ldap.LDAP
+
+		if config.LdapAddress != "" {
+			log.Info().Msg("Using LDAP for authentication")
+
+			ldapConfig := types.LdapConfig{
+				Address:      config.LdapAddress,
+				BindDN:       config.LdapBindDN,
+				BindPassword: config.LdapBindPassword,
+				BaseDN:       config.LdapBaseDN,
+				Insecure:     config.LdapInsecure,
+				SearchFilter: config.LdapSearchFilter,
+			}
+
+			// Create LDAP service
+			ldapService, err = ldap.NewLDAP(ldapConfig)
+			HandleError(err, "Failed to create LDAP service")
+		} else {
+			log.Info().Msg("LDAP not configured, using local users or OAuth")
+		}
+
+		// Check if we have any users configured
+		if len(users) == 0 && !utils.OAuthConfigured(config) && ldapService == nil {
+			HandleError(errors.New("err no users"), "Unable to find a source of users")
+		}
+
 		// Create auth service
-		auth := auth.NewAuth(authConfig, docker)
+		auth := auth.NewAuth(authConfig, docker, ldapService)
 
 		// Create OAuth providers service
 		providers := providers.NewProviders(oauthConfig)
@@ -221,6 +245,12 @@
 	rootCmd.Flags().String("app-title", "Tinyauth", "Title of the app.")
 	rootCmd.Flags().String("forgot-password-message", "You can reset your password by changing the `USERS` environment variable.", "Message to show on the forgot password page.")
 	rootCmd.Flags().String("background-image", "/background.jpg", "Background image URL for the login page.")
+	rootCmd.Flags().String("ldap-address", "", "LDAP server address (e.g. ldap://localhost:389).")
+	rootCmd.Flags().String("ldap-bind-dn", "", "LDAP bind DN (e.g. uid=user,dc=example,dc=com).")
+	rootCmd.Flags().String("ldap-bind-password", "", "LDAP bind password.")
+	rootCmd.Flags().String("ldap-base-dn", "", "LDAP base DN (e.g. dc=example,dc=com).")
+	rootCmd.Flags().Bool("ldap-insecure", false, "Skip certificate verification for the LDAP server.")
+	rootCmd.Flags().String("ldap-search-filter", "(uid=%s)", "LDAP search filter for user lookup.")
 
 	// Bind flags to environment
 	viper.BindEnv("port", "PORT")
@@ -256,6 +286,12 @@
 	viper.BindEnv("login-max-retries", "LOGIN_MAX_RETRIES")
 	viper.BindEnv("forgot-password-message", "FORGOT_PASSWORD_MESSAGE")
 	viper.BindEnv("background-image", "BACKGROUND_IMAGE")
+	viper.BindEnv("ldap-address", "LDAP_ADDRESS")
+	viper.BindEnv("ldap-bind-dn", "LDAP_BIND_DN")
+	viper.BindEnv("ldap-bind-password", "LDAP_BIND_PASSWORD")
+	viper.BindEnv("ldap-base-dn", "LDAP_BASE_DN")
+	viper.BindEnv("ldap-insecure", "LDAP_INSECURE")
+	viper.BindEnv("ldap-search-filter", "LDAP_SEARCH_FILTER")
 
 	// Bind flags to viper
 	viper.BindPFlags(rootCmd.Flags())

frontend/src/pages/login-page.tsx

@@ -162,9 +162,9 @@ export const LoginPage = () => {
           />
         )}
         {configuredProviders.length == 0 && (
-          <h3 className="text-center text-xl text-red-600">
+          <p className="text-center text-red-600 max-w-sm">
             {t("failedToFetchProvidersTitle")}
-          </h3>
+          </p>
         )}
       </CardContent>
     </Card>

go.mod

@@ -16,11 +16,13 @@ require (
 )
 
 require (
+	github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 // indirect
 	github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc // indirect
 	github.com/charmbracelet/x/cellbuf v0.0.13 // indirect
 	github.com/containerd/errdefs v1.0.0 // indirect
 	github.com/containerd/errdefs/pkg v0.3.0 // indirect
 	github.com/containerd/log v0.1.0 // indirect
+	github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667 // indirect
 	github.com/go-viper/mapstructure/v2 v2.3.0 // indirect
 	github.com/moby/sys/atomicwriter v0.1.0 // indirect
 	github.com/moby/term v0.5.2 // indirect
@@ -60,6 +62,7 @@ require (
 	github.com/fsnotify/fsnotify v1.8.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
 	github.com/gin-contrib/sse v1.0.0 // indirect
+	github.com/go-ldap/ldap/v3 v3.4.11
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect

go.sum

@@ -1,9 +1,13 @@
 github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c h1:udKWzYgxTojEKWjV8V+WSxDXJ4NFATAsZjh8iIbsQIg=
 github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
+github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358 h1:mFRzDkZVAjdal+s7s0MwaRv9igoPqLRdzOLzw/8Xvq8=
+github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
 github.com/MakeNowJust/heredoc v1.0.0 h1:cXCdzVdstXyiTqTvfqk9SDHpKNjxuom+DOlyEeQ4pzQ=
 github.com/MakeNowJust/heredoc v1.0.0/go.mod h1:mG5amYoWBHf8vpLOuehzbGGw0EHxpZZ6lCpQ4fNJ8LE=
 github.com/Microsoft/go-winio v0.4.14 h1:+hMXMk01us9KgxGb7ftKQt2Xpf5hH/yky+TDA+qxleU=
 github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa h1:LHTHcTQiSGT7VVbI0o4wBRNQIgn917usHWOd6VAffYI=
+github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
 github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
 github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
@@ -90,6 +94,10 @@ github.com/gin-contrib/sse v1.0.0 h1:y3bT1mUWUxDpW4JLQg/HnTqV4rozuW4tC9eFKTxYI9E
 github.com/gin-contrib/sse v1.0.0/go.mod h1:zNuFdwarAygJBht0NTKiSi3jRf6RbqeILZ9Sp6Slhe0=
 github.com/gin-gonic/gin v1.10.1 h1:T0ujvqyCSqRopADpgPgiTT63DUQVSfojyME59Ei63pQ=
 github.com/gin-gonic/gin v1.10.1/go.mod h1:4PMNQiOhvDRa013RKVbsiNwoyezlm2rm0uX/T7kzp5Y=
+github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667 h1:BP4M0CvQ4S3TGls2FvczZtj5Re/2ZzkV9VwqPHH/3Bo=
+github.com/go-asn1-ber/asn1-ber v1.5.8-0.20250403174932-29230038a667/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
+github.com/go-ldap/ldap/v3 v3.4.11 h1:4k0Yxweg+a3OyBLjdYn5OKglv18JNvfDykSoI8bW0gU=
+github.com/go-ldap/ldap/v3 v3.4.11/go.mod h1:bY7t0FLK8OAVpp/vV6sSlpz3EQDGcQwc8pF0ujLgKvM=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
 github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
@@ -126,8 +134,22 @@ github.com/gorilla/sessions v1.4.0 h1:kpIYOp/oi6MG/p5PgxApU8srsSw9tuFbt46Lt7auzq
 github.com/gorilla/sessions v1.4.0/go.mod h1:FLWm50oby91+hl7p/wRxDth9bWSuk0qVL2emc7lT5ik=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.25.1 h1:VNqngBF40hVlDloBruUehVYC3ArSgIyScOAyMRqBxRg=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.25.1/go.mod h1:RBRO7fro65R6tjKzYgLAFo0t1QEXY1Dp+i/bvpRiqiQ=
+github.com/hashicorp/go-uuid v1.0.3 h1:2gKiV6YVmrJ1i2CKKa9obLvRieoRGviZFL26PcT/Co8=
+github.com/hashicorp/go-uuid v1.0.3/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/jcmturner/aescts/v2 v2.0.0 h1:9YKLH6ey7H4eDBXW8khjYslgyqG2xZikXP0EQFKrle8=
+github.com/jcmturner/aescts/v2 v2.0.0/go.mod h1:AiaICIRyfYg35RUkr8yESTqvSy7csK90qZ5xfvvsoNs=
+github.com/jcmturner/dnsutils/v2 v2.0.0 h1:lltnkeZGL0wILNvrNiVCR6Ro5PGU/SeBvVO/8c/iPbo=
+github.com/jcmturner/dnsutils/v2 v2.0.0/go.mod h1:b0TnjGOvI/n42bZa+hmXL+kFJZsFT7G4t3HTlQ184QM=
+github.com/jcmturner/gofork v1.7.6 h1:QH0l3hzAU1tfT3rZCnW5zXl+orbkNMMRGJfdJjHVETg=
+github.com/jcmturner/gofork v1.7.6/go.mod h1:1622LH6i/EZqLloHfE7IeZ0uEJwMSUyQ/nDd82IeqRo=
+github.com/jcmturner/goidentity/v6 v6.0.1 h1:VKnZd2oEIMorCTsFBnJWbExfNN7yZr3EhJAxwOkZg6o=
+github.com/jcmturner/goidentity/v6 v6.0.1/go.mod h1:X1YW3bgtvwAXju7V3LCIMpY0Gbxyjn/mY9zx4tFonSg=
+github.com/jcmturner/gokrb5/v8 v8.4.4 h1:x1Sv4HaTpepFkXbt2IkL29DXRf8sOfZXo8eRKh687T8=
+github.com/jcmturner/gokrb5/v8 v8.4.4/go.mod h1:1btQEpgT6k+unzCwX1KdWMEwPPkkgBtP+F6aCACiMrs=
+github.com/jcmturner/rpc/v2 v2.0.3 h1:7FXXj8Ti1IaVFpSAziCZWNzbNuZmnvw/i6CqLNdWfZY=
+github.com/jcmturner/rpc/v2 v2.0.3/go.mod h1:VUJYCIDm3PVOEHw8sgt091/20OJjskO/YJki3ELg/Hc=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=

internal/auth/auth.go

@@ -7,6 +7,7 @@
 	"sync"
 	"time"
 	"tinyauth/internal/docker"
+	"tinyauth/internal/ldap"
 	"tinyauth/internal/types"
 	"tinyauth/internal/utils"
 
@@ -22,9 +23,10 @@
 	LoginAttempts map[string]*types.LoginAttempt
 	LoginMutex    sync.RWMutex
 	Store         *sessions.CookieStore
+	LDAP          *ldap.LDAP
 }
 
-func NewAuth(config types.AuthConfig, docker *docker.Docker) *Auth {
+func NewAuth(config types.AuthConfig, docker *docker.Docker, ldap *ldap.LDAP) *Auth {
 	// Create cookie store
 	store := sessions.NewCookieStore([]byte(config.HMACSecret), []byte(config.EncryptionSecret))
 
@@ -42,6 +44,7 @@
 		Docker:        docker,
 		LoginAttempts: make(map[string]*types.LoginAttempt),
 		Store:         store,
+		LDAP:          ldap,
 	}
 }
 
@@ -68,14 +71,97 @@
 	return session, nil
 }
 
-func (auth *Auth) GetUser(username string) *types.User {
+func (auth *Auth) SearchUser(username string) types.UserSearch {
 	// Loop through users and return the user if the username matches
+	log.Debug().Str("username", username).Msg("Searching for user")
+
+	if auth.GetLocalUser(username).Username != "" {
+		log.Debug().Str("username", username).Msg("Found local user")
+
+		// If user found, return a user with the username and type "local"
+		return types.UserSearch{
+			Username: username,
+			Type:     "local",
+		}
+	}
+
+	// If no user found, check LDAP
+	if auth.LDAP != nil {
+		log.Debug().Str("username", username).Msg("Checking LDAP for user")
+
+		userDN, err := auth.LDAP.Search(username)
+		if err != nil {
+			log.Warn().Err(err).Str("username", username).Msg("Failed to find user in LDAP")
+			return types.UserSearch{}
+		}
+
+		// If user found in LDAP, return a user with the DN as username
+		return types.UserSearch{
+			Username: userDN,
+			Type:     "ldap",
+		}
+	}
+
+	return types.UserSearch{}
+}
+
+func (auth *Auth) VerifyUser(search types.UserSearch, password string) bool {
+	// Authenticate the user based on the type
+	switch search.Type {
+	case "local":
+		// Get local user
+		user := auth.GetLocalUser(search.Username)
+
+		// Check if password is correct
+		return auth.CheckPassword(user, password)
+	case "ldap":
+		// If LDAP is configured, bind to the LDAP server with the user DN and password
+		if auth.LDAP != nil {
+			log.Debug().Str("username", search.Username).Msg("Binding to LDAP for user authentication")
+
+			// Bind to the LDAP server
+			err := auth.LDAP.Bind(search.Username, password)
+			if err != nil {
+				log.Warn().Err(err).Str("username", search.Username).Msg("Failed to bind to LDAP")
+				return false
+			}
+
+			// If bind is successful, rebind with the LDAP bind user
+			err = auth.LDAP.Bind(auth.LDAP.Config.BindDN, auth.LDAP.Config.BindPassword)
+			if err != nil {
+				log.Error().Err(err).Msg("Failed to rebind with service account after user authentication")
+				// Consider closing the connection or creating a new one
+				return false
+			}
+
+			log.Debug().Str("username", search.Username).Msg("LDAP authentication successful")
+
+			// Return true if the bind was successful
+			return true
+		}
+	default:
+		log.Warn().Str("type", search.Type).Msg("Unknown user type for authentication")
+		return false
+	}
+
+	// If no user found or authentication failed, return false
+	log.Warn().Str("username", search.Username).Msg("User authentication failed")
+	return false
+}
+
+func (auth *Auth) GetLocalUser(username string) types.User {
+	// Loop through users and return the user if the username matches
+	log.Debug().Str("username", username).Msg("Searching for local user")
+
 	for _, user := range auth.Config.Users {
 		if user.Username == username {
-			return &user
+			return user
 		}
 	}
-	return nil
+
+	// If no user found, return an empty user
+	log.Warn().Str("username", username).Msg("Local user not found")
+	return types.User{}
 }
 
 func (auth *Auth) CheckPassword(user types.User, password string) bool {
@@ -275,7 +361,7 @@
 
 func (auth *Auth) UserAuthConfigured() bool {
 	// If there are users, return true
-	return len(auth.Config.Users) > 0
+	return len(auth.Config.Users) > 0 || auth.LDAP != nil
 }
 
 func (auth *Auth) ResourceAllowed(c *gin.Context, context types.UserContext, labels types.Labels) bool {

internal/auth/auth_test.go

@@ -18,7 +18,7 @@ func TestLoginRateLimiting(t *testing.T) {
 	// Initialize a new auth service with 3 max retries and 5 seconds timeout
 	config.LoginMaxRetries = 3
 	config.LoginTimeout = 5
-	authService := auth.NewAuth(config, &docker.Docker{})
+	authService := auth.NewAuth(config, &docker.Docker{}, nil)
 
 	// Test identifier
 	identifier := "test_user"
@@ -62,7 +62,7 @@ func TestLoginRateLimiting(t *testing.T) {
 	// Reinitialize auth service with a shorter timeout for testing
 	config.LoginTimeout = 1
 	config.LoginMaxRetries = 3
-	authService = auth.NewAuth(config, &docker.Docker{})
+	authService = auth.NewAuth(config, &docker.Docker{}, nil)
 
 	// Add enough failed attempts to lock the account
 	for i := 0; i < 3; i++ {
@@ -87,7 +87,7 @@ func TestLoginRateLimiting(t *testing.T) {
 	t.Log("Testing disabled rate limiting")
 	config.LoginMaxRetries = 0
 	config.LoginTimeout = 0
-	authService = auth.NewAuth(config, &docker.Docker{})
+	authService = auth.NewAuth(config, &docker.Docker{}, nil)
 
 	for i := 0; i < 10; i++ {
 		authService.RecordLoginAttempt(identifier, false)
@@ -103,7 +103,7 @@ func TestConcurrentLoginAttempts(t *testing.T) {
 	// Initialize a new auth service with 2 max retries and 5 seconds timeout
 	config.LoginMaxRetries = 2
 	config.LoginTimeout = 5
-	authService := auth.NewAuth(config, &docker.Docker{})
+	authService := auth.NewAuth(config, &docker.Docker{}, nil)
 
 	// Test multiple identifiers
 	identifiers := []string{"user1", "user2", "user3"}