[tunnel/token] Add TokenIssuer interface

Author: dilyevsky

pkg/apiserver/controllers/tunnelnode.go

@@ -36,7 +36,7 @@ type TunnelNodeReconciler struct {
 	ipamv6, ipamv4        tunnet.IPAM
 
 	validator *token.InMemoryValidator
-	issuer    *token.Issuer
+	issuer    token.TokenIssuer
 }
 
 func NewTunnelNodeReconciler(

pkg/tunnel/token/issuer.go

@@ -10,6 +10,12 @@ import (
 	"github.com/golang-jwt/jwt/v5"
 )
 
+// TokenIssuer is an interface for issuing JWT tokens.
+type TokenIssuer interface {
+	IssueToken(subject string, ttl time.Duration) (string, jwt.Claims, error)
+}
+
+// Issuer implements TokenIssuer for issuing JWT tokens.
 type Issuer struct {
 	privateKey *ecdsa.PrivateKey
 	kid        string