[relay] Improve relay messages (#2574)

Co-authored-by: Zoltán Papp <zoltan.pmail@gmail.com>

relay/auth/validator.go

@@ -1,8 +1,35 @@
 package auth
 
-import "hash"
+import (
+	"time"
+
+	auth "github.com/netbirdio/netbird/relay/auth/hmac"
+	authv2 "github.com/netbirdio/netbird/relay/auth/hmac/v2"
+)
 
 // Validator is an interface that defines the Validate method.
 type Validator interface {
-	Validate(func() hash.Hash, any) error
+	Validate(any) error
+	// Deprecated: Use Validate instead.
+	ValidateHelloMsgType(any) error
+}
+
+type TimedHMACValidator struct {
+	authenticatorV2 *authv2.Validator
+	authenticator   *auth.TimedHMACValidator
+}
+
+func NewTimedHMACValidator(secret []byte, duration time.Duration) *TimedHMACValidator {
+	return &TimedHMACValidator{
+		authenticatorV2: authv2.NewValidator(secret),
+		authenticator:   auth.NewTimedHMACValidator(string(secret), duration),
+	}
+}
+
+func (a *TimedHMACValidator) Validate(credentials any) error {
+	return a.authenticatorV2.Validate(credentials)
+}
+
+func (a *TimedHMACValidator) ValidateHelloMsgType(credentials any) error {
+	return a.authenticator.Validate(credentials)
 }