Chore: Refactor manifest verifier (#67218)

pkg/services/pluginsintegration/keyretriever/retriever.go

@@ -0,0 +1,29 @@
+package keyretriever
+
+import (
+	"context"
+
+	"github.com/grafana/grafana/pkg/plugins"
+	"github.com/grafana/grafana/pkg/plugins/manager/signature/statickey"
+	"github.com/grafana/grafana/pkg/services/pluginsintegration/keyretriever/dynamic"
+)
+
+var _ plugins.KeyRetriever = (*Service)(nil)
+
+type Service struct {
+	kr plugins.KeyRetriever
+}
+
+func ProvideService(dkr *dynamic.KeyRetriever) *Service {
+	s := &Service{}
+	if !dkr.IsDisabled() {
+		s.kr = dkr
+	} else {
+		s.kr = statickey.New()
+	}
+	return s
+}
+
+func (kr *Service) GetPublicKey(ctx context.Context, keyID string) (string, error) {
+	return kr.kr.GetPublicKey(ctx, keyID)
+}