add auther config

pkg/registry/auther.go

@@ -0,0 +1,62 @@
+package registry
+
+import (
+	"sync"
+
+	"github.com/go-gost/gost/pkg/auth"
+)
+
+var (
+	autherReg = &autherRegistry{}
+)
+
+func Auther() *autherRegistry {
+	return autherReg
+}
+
+type autherRegistry struct {
+	m sync.Map
+}
+
+func (r *autherRegistry) Register(name string, auth auth.Authenticator) error {
+	if _, loaded := r.m.LoadOrStore(name, auth); loaded {
+		return ErrDup
+	}
+
+	return nil
+}
+
+func (r *autherRegistry) Unregister(name string) {
+	r.m.Delete(name)
+}
+
+func (r *autherRegistry) IsRegistered(name string) bool {
+	_, ok := r.m.Load(name)
+	return ok
+}
+
+func (r *autherRegistry) Get(name string) auth.Authenticator {
+	if name == "" {
+		return nil
+	}
+	return &autherWrapper{name: name}
+}
+
+func (r *autherRegistry) get(name string) auth.Authenticator {
+	if v, ok := r.m.Load(name); ok {
+		return v.(auth.Authenticator)
+	}
+	return nil
+}
+
+type autherWrapper struct {
+	name string
+}
+
+func (w *autherWrapper) Authenticate(user, password string) bool {
+	v := autherReg.get(w.name)
+	if v == nil {
+		return true
+	}
+	return v.Authenticate(user, password)
+}

pkg/registry/bypass.go

@@ -36,6 +36,9 @@ func (r *bypassRegistry) IsRegistered(name string) bool {
 }
 
 func (r *bypassRegistry) Get(name string) bypass.Bypass {
+	if name == "" {
+		return nil
+	}
 	return &bypassWrapper{name: name}
 }
 

pkg/registry/chain.go

@@ -36,6 +36,9 @@ func (r *chainRegistry) IsRegistered(name string) bool {
 }
 
 func (r *chainRegistry) Get(name string) chain.Chainer {
+	if name == "" {
+		return nil
+	}
 	return &chainWrapper{name: name}
 }
 

pkg/registry/hosts.go

@@ -37,6 +37,9 @@ func (r *hostsRegistry) IsRegistered(name string) bool {
 }
 
 func (r *hostsRegistry) Get(name string) hosts.HostMapper {
+	if name == "" {
+		return nil
+	}
 	return &hostsWrapper{name: name}
 }
 

pkg/registry/resolver.go

@@ -38,6 +38,9 @@ func (r *resolverRegistry) IsRegistered(name string) bool {
 }
 
 func (r *resolverRegistry) Get(name string) resolver.Resolver {
+	if name == "" {
+		return nil
+	}
 	return &resolverWrapper{name: name}
 }
 

pkg/registry/service.go

@@ -36,6 +36,9 @@ func (r *serviceRegistry) IsRegistered(name string) bool {
 }
 
 func (r *serviceRegistry) Get(name string) *service.Service {
+	if name == "" {
+		return nil
+	}
 	v, ok := r.m.Load(name)
 	if !ok {
 		return nil