refactor: separate auth config from runtime and defer token resolution (#5105)

client/control.go

@@ -43,8 +43,8 @@ type SessionContext struct {
 	Conn net.Conn
 	// Indicates whether the connection is encrypted.
 	ConnEncrypted bool
-	// Sets authentication based on selected method
+	// Auth runtime used for login, heartbeats, and encryption.
-	AuthSetter auth.Setter
+	Auth *auth.ClientAuth
 	// Connector is used to create new connections, which could be real TCP connections or virtual streams.
 	Connector Connector
 	// Virtual net controller
@@ -91,7 +91,7 @@ func NewControl(ctx context.Context, sessionCtx *SessionContext) (*Control, erro
 	ctl.lastPong.Store(time.Now())
 
 	if sessionCtx.ConnEncrypted {
-		cryptoRW, err := netpkg.NewCryptoReadWriter(sessionCtx.Conn, []byte(sessionCtx.Common.Auth.Token))
+		cryptoRW, err := netpkg.NewCryptoReadWriter(sessionCtx.Conn, sessionCtx.Auth.EncryptionKey())
 		if err != nil {
 			return nil, err
 		}
@@ -102,7 +102,7 @@ func NewControl(ctx context.Context, sessionCtx *SessionContext) (*Control, erro
 	ctl.registerMsgHandlers()
 	ctl.msgTransporter = transport.NewMessageTransporter(ctl.msgDispatcher)
 
-	ctl.pm = proxy.NewManager(ctl.ctx, sessionCtx.Common, ctl.msgTransporter, sessionCtx.VnetController)
+	ctl.pm = proxy.NewManager(ctl.ctx, sessionCtx.Common, sessionCtx.Auth.EncryptionKey(), ctl.msgTransporter, sessionCtx.VnetController)
 	ctl.vm = visitor.NewManager(ctl.ctx, sessionCtx.RunID, sessionCtx.Common,
 		ctl.connectServer, ctl.msgTransporter, sessionCtx.VnetController)
 	return ctl, nil
@@ -133,7 +133,7 @@ func (ctl *Control) handleReqWorkConn(_ msg.Message) {
 	m := &msg.NewWorkConn{
 		RunID: ctl.sessionCtx.RunID,
 	}
-	if err = ctl.sessionCtx.AuthSetter.SetNewWorkConn(m); err != nil {
+	if err = ctl.sessionCtx.Auth.Setter.SetNewWorkConn(m); err != nil {
 		xl.Warnf("error during NewWorkConn authentication: %v", err)
 		workConn.Close()
 		return
@@ -243,7 +243,7 @@ func (ctl *Control) heartbeatWorker() {
 		sendHeartBeat := func() (bool, error) {
 			xl.Debugf("send heartbeat to server")
 			pingMsg := &msg.Ping{}
-			if err := ctl.sessionCtx.AuthSetter.SetPing(pingMsg); err != nil {
+			if err := ctl.sessionCtx.Auth.Setter.SetPing(pingMsg); err != nil {
 				xl.Warnf("error during ping authentication: %v, skip sending ping message", err)
 				return false, err
 			}

client/proxy/proxy.go

@@ -57,6 +57,7 @@ func NewProxy(
 	ctx context.Context,
 	pxyConf v1.ProxyConfigurer,
 	clientCfg *v1.ClientCommonConfig,
+	encryptionKey []byte,
 	msgTransporter transport.MessageTransporter,
 	vnetController *vnet.Controller,
 ) (pxy Proxy) {
@@ -69,6 +70,7 @@ func NewProxy(
 	baseProxy := BaseProxy{
 		baseCfg:        pxyConf.GetBaseConfig(),
 		clientCfg:      clientCfg,
+		encryptionKey:  encryptionKey,
 		limiter:        limiter,
 		msgTransporter: msgTransporter,
 		vnetController: vnetController,
@@ -86,6 +88,7 @@ func NewProxy(
 type BaseProxy struct {
 	baseCfg        *v1.ProxyBaseConfig
 	clientCfg      *v1.ClientCommonConfig
+	encryptionKey  []byte
 	msgTransporter transport.MessageTransporter
 	vnetController *vnet.Controller
 	limiter        *rate.Limiter
@@ -129,7 +132,7 @@ func (pxy *BaseProxy) InWorkConn(conn net.Conn, m *msg.StartWorkConn) {
 			return
 		}
 	}
-	pxy.HandleTCPWorkConnection(conn, m, []byte(pxy.clientCfg.Auth.Token))
+	pxy.HandleTCPWorkConnection(conn, m, pxy.encryptionKey)
 }
 
 // Common handler for tcp work connections.

client/proxy/proxy_manager.go

@@ -40,6 +40,7 @@ type Manager struct {
 	closed bool
 	mu     sync.RWMutex
 
+	encryptionKey []byte
 	clientCfg     *v1.ClientCommonConfig
 
 	ctx context.Context
@@ -48,6 +49,7 @@ type Manager struct {
 func NewManager(
 	ctx context.Context,
 	clientCfg *v1.ClientCommonConfig,
+	encryptionKey []byte,
 	msgTransporter transport.MessageTransporter,
 	vnetController *vnet.Controller,
 ) *Manager {
@@ -56,6 +58,7 @@ func NewManager(
 		msgTransporter: msgTransporter,
 		vnetController: vnetController,
 		closed:         false,
+		encryptionKey:  encryptionKey,
 		clientCfg:      clientCfg,
 		ctx:            ctx,
 	}
@@ -163,7 +166,7 @@ func (pm *Manager) UpdateAll(proxyCfgs []v1.ProxyConfigurer) {
 	for _, cfg := range proxyCfgs {
 		name := cfg.GetBaseConfig().Name
 		if _, ok := pm.proxies[name]; !ok {
-			pxy := NewWrapper(pm.ctx, cfg, pm.clientCfg, pm.HandleEvent, pm.msgTransporter, pm.vnetController)
+			pxy := NewWrapper(pm.ctx, cfg, pm.clientCfg, pm.encryptionKey, pm.HandleEvent, pm.msgTransporter, pm.vnetController)
 			if pm.inWorkConnCallback != nil {
 				pxy.SetInWorkConnCallback(pm.inWorkConnCallback)
 			}

client/proxy/proxy_wrapper.go

@@ -92,6 +92,7 @@ func NewWrapper(
 	ctx context.Context,
 	cfg v1.ProxyConfigurer,
 	clientCfg *v1.ClientCommonConfig,
+	encryptionKey []byte,
 	eventHandler event.Handler,
 	msgTransporter transport.MessageTransporter,
 	vnetController *vnet.Controller,
@@ -122,7 +123,7 @@ func NewWrapper(
 		xl.Tracef("enable health check monitor")
 	}
 
-	pw.pxy = NewProxy(pw.ctx, pw.Cfg, clientCfg, pw.msgTransporter, pw.vnetController)
+	pw.pxy = NewProxy(pw.ctx, pw.Cfg, clientCfg, encryptionKey, pw.msgTransporter, pw.vnetController)
 	return pw
 }
 

client/proxy/sudp.go

@@ -91,7 +91,7 @@ func (pxy *SUDPProxy) InWorkConn(conn net.Conn, _ *msg.StartWorkConn) {
 		})
 	}
 	if pxy.cfg.Transport.UseEncryption {
-		rwc, err = libio.WithEncryption(rwc, []byte(pxy.clientCfg.Auth.Token))
+		rwc, err = libio.WithEncryption(rwc, pxy.encryptionKey)
 		if err != nil {
 			conn.Close()
 			xl.Errorf("create encryption stream error: %v", err)

client/proxy/udp.go

@@ -102,7 +102,7 @@ func (pxy *UDPProxy) InWorkConn(conn net.Conn, _ *msg.StartWorkConn) {
 		})
 	}
 	if pxy.cfg.Transport.UseEncryption {
-		rwc, err = libio.WithEncryption(rwc, []byte(pxy.clientCfg.Auth.Token))
+		rwc, err = libio.WithEncryption(rwc, pxy.encryptionKey)
 		if err != nil {
 			conn.Close()
 			xl.Errorf("create encryption stream error: %v", err)

client/service.go

@@ -111,8 +111,8 @@ type Service struct {
 	// Uniq id got from frps, it will be attached to loginMsg.
 	runID string
 
-	// Sets authentication based on selected method
+	// Auth runtime and encryption materials
-	authSetter auth.Setter
+	auth *auth.ClientAuth
 
 	// web server for admin UI and apis
 	webServer *httppkg.Server
@@ -155,14 +155,14 @@ func NewService(options ServiceOptions) (*Service, error) {
 		webServer = ws
 	}
 
-	authSetter, err := auth.NewAuthSetter(options.Common.Auth)
+	authRuntime, err := auth.BuildClientAuth(&options.Common.Auth)
 	if err != nil {
 		return nil, err
 	}
 
 	s := &Service{
 		ctx:              context.Background(),
-		authSetter:       authSetter,
+		auth:             authRuntime,
 		webServer:        webServer,
 		common:           options.Common,
 		configFilePath:   options.ConfigFilePath,
@@ -296,7 +296,7 @@ func (svr *Service) login() (conn net.Conn, connector Connector, err error) {
 	}
 
 	// Add auth
-	if err = svr.authSetter.SetLogin(loginMsg); err != nil {
+	if err = svr.auth.Setter.SetLogin(loginMsg); err != nil {
 		return
 	}
 
@@ -350,7 +350,7 @@ func (svr *Service) loopLoginUntilSuccess(maxInterval time.Duration, firstLoginE
 			RunID:          svr.runID,
 			Conn:           conn,
 			ConnEncrypted:  connEncrypted,
-			AuthSetter:     svr.authSetter,
+			Auth:           svr.auth,
 			Connector:      connector,
 			VnetController: svr.vnetController,
 		}

cmd/frpc/sub/proxy.go

@@ -80,7 +80,8 @@ func NewProxyCommand(name string, c v1.ProxyConfigurer, clientCfg *v1.ClientComm
 			}
 
 			unsafeFeatures := security.NewUnsafeFeatures(allowUnsafe)
-			if _, err := validation.ValidateClientCommonConfig(clientCfg, unsafeFeatures); err != nil {
+			validator := validation.NewConfigValidator(unsafeFeatures)
+			if _, err := validator.ValidateClientCommonConfig(clientCfg); err != nil {
 				fmt.Println(err)
 				os.Exit(1)
 			}
@@ -110,7 +111,8 @@ func NewVisitorCommand(name string, c v1.VisitorConfigurer, clientCfg *v1.Client
 				os.Exit(1)
 			}
 			unsafeFeatures := security.NewUnsafeFeatures(allowUnsafe)
-			if _, err := validation.ValidateClientCommonConfig(clientCfg, unsafeFeatures); err != nil {
+			validator := validation.NewConfigValidator(unsafeFeatures)
+			if _, err := validator.ValidateClientCommonConfig(clientCfg); err != nil {
 				fmt.Println(err)
 				os.Exit(1)
 			}

cmd/frpc/sub/root.go

@@ -142,6 +142,7 @@ func runClient(cfgFilePath string, unsafeFeatures *security.UnsafeFeatures) erro
 	if err != nil {
 		return err
 	}
+
 	return startService(cfg, proxyCfgs, visitorCfgs, unsafeFeatures, cfgFilePath)
 }
 

cmd/frps/root.go

@@ -18,12 +18,14 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/spf13/cobra"
 
 	"github.com/fatedier/frp/pkg/config"
 	v1 "github.com/fatedier/frp/pkg/config/v1"
 	"github.com/fatedier/frp/pkg/config/v1/validation"
+	"github.com/fatedier/frp/pkg/policy/security"
 	"github.com/fatedier/frp/pkg/util/log"
 	"github.com/fatedier/frp/pkg/util/version"
 	"github.com/fatedier/frp/server"
@@ -33,6 +35,7 @@ var (
 	cfgFile          string
 	showVersion      bool
 	strictConfigMode bool
+	allowUnsafe      []string
 
 	serverCfg v1.ServerConfig
 )
@@ -41,6 +44,8 @@ func init() {
 	rootCmd.PersistentFlags().StringVarP(&cfgFile, "config", "c", "", "config file of frps")
 	rootCmd.PersistentFlags().BoolVarP(&showVersion, "version", "v", false, "version of frps")
 	rootCmd.PersistentFlags().BoolVarP(&strictConfigMode, "strict_config", "", true, "strict config parsing mode, unknown fields will cause errors")
+	rootCmd.PersistentFlags().StringSliceVarP(&allowUnsafe, "allow-unsafe", "", []string{},
+		fmt.Sprintf("allowed unsafe features, one or more of: %s", strings.Join(security.ServerUnsafeFeatures, ", ")))
 
 	config.RegisterServerConfigFlags(rootCmd, &serverCfg)
 }
@@ -77,7 +82,9 @@ var rootCmd = &cobra.Command{
 			svrCfg = &serverCfg
 		}
 
-		warning, err := validation.ValidateServerConfig(svrCfg)
+		unsafeFeatures := security.NewUnsafeFeatures(allowUnsafe)
+		validator := validation.NewConfigValidator(unsafeFeatures)
+		warning, err := validator.ValidateServerConfig(svrCfg)
 		if warning != nil {
 			fmt.Printf("WARNING: %v\n", warning)
 		}

cmd/frps/verify.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/fatedier/frp/pkg/config"
 	"github.com/fatedier/frp/pkg/config/v1/validation"
+	"github.com/fatedier/frp/pkg/policy/security"
 )
 
 func init() {
@@ -42,7 +43,9 @@ var verifyCmd = &cobra.Command{
 			os.Exit(1)
 		}
 
-		warning, err := validation.ValidateServerConfig(svrCfg)
+		unsafeFeatures := security.NewUnsafeFeatures(allowUnsafe)
+		validator := validation.NewConfigValidator(unsafeFeatures)
+		warning, err := validator.ValidateServerConfig(svrCfg)
 		if warning != nil {
 			fmt.Printf("WARNING: %v\n", warning)
 		}

pkg/auth/auth.go

@@ -15,6 +15,7 @@
 package auth
 
 import (
+	"context"
 	"fmt"
 
 	v1 "github.com/fatedier/frp/pkg/config/v1"
@@ -27,6 +28,39 @@ type Setter interface {
 	SetNewWorkConn(*msg.NewWorkConn) error
 }
 
+type ClientAuth struct {
+	Setter Setter
+	key    []byte
+}
+
+func (a *ClientAuth) EncryptionKey() []byte {
+	return a.key
+}
+
+// BuildClientAuth resolves any dynamic auth values and returns a prepared auth runtime.
+// Caller must run validation before calling this function.
+func BuildClientAuth(cfg *v1.AuthClientConfig) (*ClientAuth, error) {
+	if cfg == nil {
+		return nil, fmt.Errorf("auth config is nil")
+	}
+	resolved := *cfg
+	if resolved.Method == v1.AuthMethodToken && resolved.TokenSource != nil {
+		token, err := resolved.TokenSource.Resolve(context.Background())
+		if err != nil {
+			return nil, fmt.Errorf("failed to resolve auth.tokenSource: %w", err)
+		}
+		resolved.Token = token
+	}
+	setter, err := NewAuthSetter(resolved)
+	if err != nil {
+		return nil, err
+	}
+	return &ClientAuth{
+		Setter: setter,
+		key:    []byte(resolved.Token),
+	}, nil
+}
+
 func NewAuthSetter(cfg v1.AuthClientConfig) (authProvider Setter, err error) {
 	switch cfg.Method {
 	case v1.AuthMethodToken:
@@ -52,6 +86,35 @@ type Verifier interface {
 	VerifyNewWorkConn(*msg.NewWorkConn) error
 }
 
+type ServerAuth struct {
+	Verifier Verifier
+	key      []byte
+}
+
+func (a *ServerAuth) EncryptionKey() []byte {
+	return a.key
+}
+
+// BuildServerAuth resolves any dynamic auth values and returns a prepared auth runtime.
+// Caller must run validation before calling this function.
+func BuildServerAuth(cfg *v1.AuthServerConfig) (*ServerAuth, error) {
+	if cfg == nil {
+		return nil, fmt.Errorf("auth config is nil")
+	}
+	resolved := *cfg
+	if resolved.Method == v1.AuthMethodToken && resolved.TokenSource != nil {
+		token, err := resolved.TokenSource.Resolve(context.Background())
+		if err != nil {
+			return nil, fmt.Errorf("failed to resolve auth.tokenSource: %w", err)
+		}
+		resolved.Token = token
+	}
+	return &ServerAuth{
+		Verifier: NewAuthVerifier(resolved),
+		key:      []byte(resolved.Token),
+	}, nil
+}
+
 func NewAuthVerifier(cfg v1.AuthServerConfig) (authVerifier Verifier) {
 	switch cfg.Method {
 	case v1.AuthMethodToken:

pkg/config/v1/client.go

@@ -15,8 +15,6 @@
 package v1
 
 import (
-	"context"
-	"fmt"
 	"os"
 
 	"github.com/samber/lo"
@@ -198,17 +196,6 @@ type AuthClientConfig struct {
 
 func (c *AuthClientConfig) Complete() error {
 	c.Method = util.EmptyOr(c.Method, "token")
-
-	// Resolve tokenSource during configuration loading
-	if c.Method == AuthMethodToken && c.TokenSource != nil {
-		token, err := c.TokenSource.Resolve(context.Background())
-		if err != nil {
-			return fmt.Errorf("failed to resolve auth.tokenSource: %w", err)
-		}
-		// Move the resolved token to the Token field and clear TokenSource
-		c.Token = token
-		c.TokenSource = nil
-	}
 	return nil
 }
 

pkg/config/v1/client_test.go

@@ -15,8 +15,6 @@
 package v1
 
 import (
-	"os"
-	"path/filepath"
 	"testing"
 
 	"github.com/samber/lo"
@@ -38,68 +36,9 @@ func TestClientConfigComplete(t *testing.T) {
 }
 
 func TestAuthClientConfig_Complete(t *testing.T) {
-	// Create a temporary file for testing
+	require := require.New(t)
-	tmpDir := t.TempDir()
+	cfg := &AuthClientConfig{}
-	testFile := filepath.Join(tmpDir, "test_token")
+	err := cfg.Complete()
-	testContent := "client-token-value"
+	require.NoError(err)
-	err := os.WriteFile(testFile, []byte(testContent), 0o600)
+	require.EqualValues("token", cfg.Method)
-	require.NoError(t, err)
-
-	tests := []struct {
-		name        string
-		config      AuthClientConfig
-		expectToken string
-		expectPanic bool
-	}{
-		{
-			name: "tokenSource resolved to token",
-			config: AuthClientConfig{
-				Method: AuthMethodToken,
-				TokenSource: &ValueSource{
-					Type: "file",
-					File: &FileSource{
-						Path: testFile,
-					},
-				},
-			},
-			expectToken: testContent,
-			expectPanic: false,
-		},
-		{
-			name: "direct token unchanged",
-			config: AuthClientConfig{
-				Method: AuthMethodToken,
-				Token:  "direct-token",
-			},
-			expectToken: "direct-token",
-			expectPanic: false,
-		},
-		{
-			name: "invalid tokenSource should panic",
-			config: AuthClientConfig{
-				Method: AuthMethodToken,
-				TokenSource: &ValueSource{
-					Type: "file",
-					File: &FileSource{
-						Path: "/non/existent/file",
-					},
-				},
-			},
-			expectPanic: true,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if tt.expectPanic {
-				err := tt.config.Complete()
-				require.Error(t, err)
-			} else {
-				err := tt.config.Complete()
-				require.NoError(t, err)
-				require.Equal(t, tt.expectToken, tt.config.Token)
-				require.Nil(t, tt.config.TokenSource, "TokenSource should be cleared after resolution")
-			}
-		})
-	}
 }

pkg/config/v1/server.go

@@ -15,9 +15,6 @@
 package v1
 
 import (
-	"context"
-	"fmt"
-
 	"github.com/samber/lo"
 
 	"github.com/fatedier/frp/pkg/config/types"
@@ -138,17 +135,6 @@ type AuthServerConfig struct {
 
 func (c *AuthServerConfig) Complete() error {
 	c.Method = util.EmptyOr(c.Method, "token")
-
-	// Resolve tokenSource during configuration loading
-	if c.Method == AuthMethodToken && c.TokenSource != nil {
-		token, err := c.TokenSource.Resolve(context.Background())
-		if err != nil {
-			return fmt.Errorf("failed to resolve auth.tokenSource: %w", err)
-		}
-		// Move the resolved token to the Token field and clear TokenSource
-		c.Token = token
-		c.TokenSource = nil
-	}
 	return nil
 }
 

pkg/config/v1/server_test.go

@@ -15,8 +15,6 @@
 package v1
 
 import (
-	"os"
-	"path/filepath"
 	"testing"
 
 	"github.com/samber/lo"
@@ -35,68 +33,9 @@ func TestServerConfigComplete(t *testing.T) {
 }
 
 func TestAuthServerConfig_Complete(t *testing.T) {
-	// Create a temporary file for testing
+	require := require.New(t)
-	tmpDir := t.TempDir()
+	cfg := &AuthServerConfig{}
-	testFile := filepath.Join(tmpDir, "test_token")
+	err := cfg.Complete()
-	testContent := "file-token-value"
+	require.NoError(err)
-	err := os.WriteFile(testFile, []byte(testContent), 0o600)
+	require.EqualValues("token", cfg.Method)
-	require.NoError(t, err)
-
-	tests := []struct {
-		name        string
-		config      AuthServerConfig
-		expectToken string
-		expectPanic bool
-	}{
-		{
-			name: "tokenSource resolved to token",
-			config: AuthServerConfig{
-				Method: AuthMethodToken,
-				TokenSource: &ValueSource{
-					Type: "file",
-					File: &FileSource{
-						Path: testFile,
-					},
-				},
-			},
-			expectToken: testContent,
-			expectPanic: false,
-		},
-		{
-			name: "direct token unchanged",
-			config: AuthServerConfig{
-				Method: AuthMethodToken,
-				Token:  "direct-token",
-			},
-			expectToken: "direct-token",
-			expectPanic: false,
-		},
-		{
-			name: "invalid tokenSource should panic",
-			config: AuthServerConfig{
-				Method: AuthMethodToken,
-				TokenSource: &ValueSource{
-					Type: "file",
-					File: &FileSource{
-						Path: "/non/existent/file",
-					},
-				},
-			},
-			expectPanic: true,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if tt.expectPanic {
-				err := tt.config.Complete()
-				require.Error(t, err)
-			} else {
-				err := tt.config.Complete()
-				require.NoError(t, err)
-				require.Equal(t, tt.expectToken, tt.config.Token)
-				require.Nil(t, tt.config.TokenSource, "TokenSource should be cleared after resolution")
-			}
-		})
-	}
 }

pkg/config/v1/validation/client.go

@@ -27,7 +27,7 @@ import (
 	"github.com/fatedier/frp/pkg/policy/security"
 )
 
-func ValidateClientCommonConfig(c *v1.ClientCommonConfig, unsafeFeatures *security.UnsafeFeatures) (Warning, error) {
+func (v *ConfigValidator) ValidateClientCommonConfig(c *v1.ClientCommonConfig) (Warning, error) {
 	var (
 		warnings Warning
 		errs     error
@@ -35,15 +35,15 @@ func ValidateClientCommonConfig(c *v1.ClientCommonConfig, unsafeFeatures *securi
 
 	validators := []func() (Warning, error){
 		func() (Warning, error) { return validateFeatureGates(c) },
-		func() (Warning, error) { return validateAuthConfig(&c.Auth, unsafeFeatures) },
+		func() (Warning, error) { return v.validateAuthConfig(&c.Auth) },
 		func() (Warning, error) { return nil, validateLogConfig(&c.Log) },
 		func() (Warning, error) { return nil, validateWebServerConfig(&c.WebServer) },
 		func() (Warning, error) { return validateTransportConfig(&c.Transport) },
 		func() (Warning, error) { return validateIncludeFiles(c.IncludeConfigFiles) },
 	}
 
-	for _, v := range validators {
+	for _, validator := range validators {
-		w, err := v()
+		w, err := validator()
 		warnings = AppendError(warnings, w)
 		errs = AppendError(errs, err)
 	}
@@ -59,7 +59,7 @@ func validateFeatureGates(c *v1.ClientCommonConfig) (Warning, error) {
 	return nil, nil
 }
 
-func validateAuthConfig(c *v1.AuthClientConfig, unsafeFeatures *security.UnsafeFeatures) (Warning, error) {
+func (v *ConfigValidator) validateAuthConfig(c *v1.AuthClientConfig) (Warning, error) {
 	var errs error
 	if !slices.Contains(SupportedAuthMethods, c.Method) {
 		errs = AppendError(errs, fmt.Errorf("invalid auth method, optional values are %v", SupportedAuthMethods))
@@ -76,9 +76,8 @@ func validateAuthConfig(c *v1.AuthClientConfig, unsafeFeatures *security.UnsafeF
 	// Validate tokenSource if specified
 	if c.TokenSource != nil {
 		if c.TokenSource.Type == "exec" {
-			if !unsafeFeatures.IsEnabled(security.TokenSourceExec) {
+			if err := v.ValidateUnsafeFeature(security.TokenSourceExec); err != nil {
-				errs = AppendError(errs, fmt.Errorf("unsafe feature %q is not enabled. "+
+				errs = AppendError(errs, err)
-					"To enable it, start frpc with '--allow-unsafe %s'", security.TokenSourceExec, security.TokenSourceExec))
 			}
 		}
 		if err := c.TokenSource.Validate(); err != nil {
@@ -86,13 +85,13 @@ func validateAuthConfig(c *v1.AuthClientConfig, unsafeFeatures *security.UnsafeF
 		}
 	}
 
-	if err := validateOIDCConfig(&c.OIDC, unsafeFeatures); err != nil {
+	if err := v.validateOIDCConfig(&c.OIDC); err != nil {
 		errs = AppendError(errs, err)
 	}
 	return nil, errs
 }
 
-func validateOIDCConfig(c *v1.AuthOIDCClientConfig, unsafeFeatures *security.UnsafeFeatures) error {
+func (v *ConfigValidator) validateOIDCConfig(c *v1.AuthOIDCClientConfig) error {
 	if c.TokenSource == nil {
 		return nil
 	}
@@ -104,9 +103,8 @@ func validateOIDCConfig(c *v1.AuthOIDCClientConfig, unsafeFeatures *security.Uns
 		errs = AppendError(errs, fmt.Errorf("cannot specify both auth.oidc.tokenSource and any other field of auth.oidc"))
 	}
 	if c.TokenSource.Type == "exec" {
-		if !unsafeFeatures.IsEnabled(security.TokenSourceExec) {
+		if err := v.ValidateUnsafeFeature(security.TokenSourceExec); err != nil {
-			errs = AppendError(errs, fmt.Errorf("unsafe feature %q is not enabled. "+
+			errs = AppendError(errs, err)
-				"To enable it, start frpc with '--allow-unsafe %s'", security.TokenSourceExec, security.TokenSourceExec))
 		}
 	}
 	if err := c.TokenSource.Validate(); err != nil {
@@ -167,9 +165,10 @@ func ValidateAllClientConfig(
 	visitorCfgs []v1.VisitorConfigurer,
 	unsafeFeatures *security.UnsafeFeatures,
 ) (Warning, error) {
+	validator := NewConfigValidator(unsafeFeatures)
 	var warnings Warning
 	if c != nil {
-		warning, err := ValidateClientCommonConfig(c, unsafeFeatures)
+		warning, err := validator.ValidateClientCommonConfig(c)
 		warnings = AppendError(warnings, warning)
 		if err != nil {
 			return warnings, err

pkg/config/v1/validation/server.go

@@ -21,9 +21,10 @@ import (
 	"github.com/samber/lo"
 
 	v1 "github.com/fatedier/frp/pkg/config/v1"
+	"github.com/fatedier/frp/pkg/policy/security"
 )
 
-func ValidateServerConfig(c *v1.ServerConfig) (Warning, error) {
+func (v *ConfigValidator) ValidateServerConfig(c *v1.ServerConfig) (Warning, error) {
 	var (
 		warnings Warning
 		errs     error
@@ -42,6 +43,11 @@ func ValidateServerConfig(c *v1.ServerConfig) (Warning, error) {
 
 	// Validate tokenSource if specified
 	if c.Auth.TokenSource != nil {
+		if c.Auth.TokenSource.Type == "exec" {
+			if err := v.ValidateUnsafeFeature(security.TokenSourceExec); err != nil {
+				errs = AppendError(errs, err)
+			}
+		}
 		if err := c.Auth.TokenSource.Validate(); err != nil {
 			errs = AppendError(errs, fmt.Errorf("invalid auth.tokenSource: %v", err))
 		}

pkg/config/v1/validation/validator.go

@@ -0,0 +1,28 @@
+package validation
+
+import (
+	"fmt"
+
+	"github.com/fatedier/frp/pkg/policy/security"
+)
+
+// ConfigValidator holds the context dependencies for configuration validation.
+type ConfigValidator struct {
+	unsafeFeatures *security.UnsafeFeatures
+}
+
+// NewConfigValidator creates a new ConfigValidator instance.
+func NewConfigValidator(unsafeFeatures *security.UnsafeFeatures) *ConfigValidator {
+	return &ConfigValidator{
+		unsafeFeatures: unsafeFeatures,
+	}
+}
+
+// ValidateUnsafeFeature checks if a specific unsafe feature is enabled.
+func (v *ConfigValidator) ValidateUnsafeFeature(feature string) error {
+	if !v.unsafeFeatures.IsEnabled(feature) {
+		return fmt.Errorf("unsafe feature %q is not enabled. "+
+			"To enable it, ensure it is allowed in the configuration or command line flags", feature)
+	}
+	return nil
+}

server/control.go

@@ -106,6 +106,8 @@ type Control struct {
 
 	// verifies authentication based on selected method
 	authVerifier auth.Verifier
+	// key used for connection encryption
+	encryptionKey []byte
 
 	// other components can use this to communicate with client
 	msgTransporter transport.MessageTransporter
@@ -157,6 +159,7 @@ func NewControl(
 	pxyManager *proxy.Manager,
 	pluginManager *plugin.Manager,
 	authVerifier auth.Verifier,
+	encryptionKey []byte,
 	ctlConn net.Conn,
 	ctlConnEncrypted bool,
 	loginMsg *msg.Login,
@@ -171,6 +174,7 @@ func NewControl(
 		pxyManager:    pxyManager,
 		pluginManager: pluginManager,
 		authVerifier:  authVerifier,
+		encryptionKey: encryptionKey,
 		conn:          ctlConn,
 		loginMsg:      loginMsg,
 		workConnCh:    make(chan net.Conn, poolCount+10),
@@ -186,7 +190,7 @@ func NewControl(
 	ctl.lastPing.Store(time.Now())
 
 	if ctlConnEncrypted {
-		cryptoRW, err := netpkg.NewCryptoReadWriter(ctl.conn, []byte(ctl.serverCfg.Auth.Token))
+		cryptoRW, err := netpkg.NewCryptoReadWriter(ctl.conn, ctl.encryptionKey)
 		if err != nil {
 			return nil, err
 		}
@@ -478,6 +482,7 @@ func (ctl *Control) RegisterProxy(pxyMsg *msg.NewProxy) (remoteAddr string, err
 		GetWorkConnFn:      ctl.GetWorkConn,
 		Configurer:         pxyConf,
 		ServerCfg:          ctl.serverCfg,
+		EncryptionKey:      ctl.encryptionKey,
 	})
 	if err != nil {
 		return remoteAddr, err

server/proxy/http.go

@@ -165,7 +165,7 @@ func (pxy *HTTPProxy) GetRealConn(remoteAddr string) (workConn net.Conn, err err
 
 	var rwc io.ReadWriteCloser = tmpConn
 	if pxy.cfg.Transport.UseEncryption {
-		rwc, err = libio.WithEncryption(rwc, []byte(pxy.serverCfg.Auth.Token))
+		rwc, err = libio.WithEncryption(rwc, pxy.encryptionKey)
 		if err != nil {
 			xl.Errorf("create encryption stream error: %v", err)
 			return

server/proxy/proxy.go

@@ -68,6 +68,7 @@ type BaseProxy struct {
 	poolCount     int
 	getWorkConnFn GetWorkConnFn
 	serverCfg     *v1.ServerConfig
+	encryptionKey []byte
 	limiter       *rate.Limiter
 	userInfo      plugin.UserInfo
 	loginMsg      *msg.Login
@@ -213,7 +214,6 @@ func (pxy *BaseProxy) handleUserTCPConnection(userConn net.Conn) {
 	xl := xlog.FromContextSafe(pxy.Context())
 	defer userConn.Close()
 
-	serverCfg := pxy.serverCfg
 	cfg := pxy.configurer.GetBaseConfig()
 	// server plugin hook
 	rc := pxy.GetResourceController()
@@ -240,7 +240,7 @@ func (pxy *BaseProxy) handleUserTCPConnection(userConn net.Conn) {
 	xl.Tracef("handler user tcp connection, use_encryption: %t, use_compression: %t",
 		cfg.Transport.UseEncryption, cfg.Transport.UseCompression)
 	if cfg.Transport.UseEncryption {
-		local, err = libio.WithEncryption(local, []byte(serverCfg.Auth.Token))
+		local, err = libio.WithEncryption(local, pxy.encryptionKey)
 		if err != nil {
 			xl.Errorf("create encryption stream error: %v", err)
 			return
@@ -279,6 +279,7 @@ type Options struct {
 	GetWorkConnFn      GetWorkConnFn
 	Configurer         v1.ProxyConfigurer
 	ServerCfg          *v1.ServerConfig
+	EncryptionKey      []byte
 }
 
 func NewProxy(ctx context.Context, options *Options) (pxy Proxy, err error) {
@@ -298,6 +299,7 @@ func NewProxy(ctx context.Context, options *Options) (pxy Proxy, err error) {
 		poolCount:     options.PoolCount,
 		getWorkConnFn: options.GetWorkConnFn,
 		serverCfg:     options.ServerCfg,
+		encryptionKey: options.EncryptionKey,
 		limiter:       limiter,
 		xl:            xl,
 		ctx:           xlog.NewContext(ctx, xl),

server/proxy/udp.go

@@ -205,7 +205,7 @@ func (pxy *UDPProxy) Run() (remoteAddr string, err error) {
 
 			var rwc io.ReadWriteCloser = workConn
 			if pxy.cfg.Transport.UseEncryption {
-				rwc, err = libio.WithEncryption(rwc, []byte(pxy.serverCfg.Auth.Token))
+				rwc, err = libio.WithEncryption(rwc, pxy.encryptionKey)
 				if err != nil {
 					xl.Errorf("create encryption stream error: %v", err)
 					workConn.Close()

server/service.go

@@ -113,8 +113,8 @@ type Service struct {
 
 	sshTunnelGateway *ssh.Gateway
 
-	// Verifies authentication based on selected method
+	// Auth runtime and encryption materials
-	authVerifier auth.Verifier
+	auth *auth.ServerAuth
 
 	tlsConfig *tls.Config
 
@@ -149,6 +149,11 @@ func NewService(cfg *v1.ServerConfig) (*Service, error) {
 		}
 	}
 
+	authRuntime, err := auth.BuildServerAuth(&cfg.Auth)
+	if err != nil {
+		return nil, err
+	}
+
 	svr := &Service{
 		ctlManager:    NewControlManager(),
 		pxyManager:    proxy.NewManager(),
@@ -160,7 +165,7 @@ func NewService(cfg *v1.ServerConfig) (*Service, error) {
 		},
 		sshTunnelListener: netpkg.NewInternalListener(),
 		httpVhostRouter:   vhost.NewRouters(),
-		authVerifier:      auth.NewAuthVerifier(cfg.Auth),
+		auth:              authRuntime,
 		webServer:         webServer,
 		tlsConfig:         tlsConfig,
 		cfg:               cfg,
@@ -586,7 +591,7 @@ func (svr *Service) RegisterControl(ctlConn net.Conn, loginMsg *msg.Login, inter
 		ctlConn.RemoteAddr().String(), loginMsg.Version, loginMsg.Hostname, loginMsg.Os, loginMsg.Arch)
 
 	// Check auth.
-	authVerifier := svr.authVerifier
+	authVerifier := svr.auth.Verifier
 	if internal && loginMsg.ClientSpec.AlwaysAuthPass {
 		authVerifier = auth.AlwaysPassVerifier
 	}
@@ -595,7 +600,7 @@ func (svr *Service) RegisterControl(ctlConn net.Conn, loginMsg *msg.Login, inter
 	}
 
 	// TODO(fatedier): use SessionContext
-	ctl, err := NewControl(ctx, svr.rc, svr.pxyManager, svr.pluginManager, authVerifier, ctlConn, !internal, loginMsg, svr.cfg)
+	ctl, err := NewControl(ctx, svr.rc, svr.pxyManager, svr.pluginManager, authVerifier, svr.auth.EncryptionKey(), ctlConn, !internal, loginMsg, svr.cfg)
 	if err != nil {
 		xl.Warnf("create new controller error: %v", err)
 		// don't return detailed errors to client