missed some files

cmd/utils.go

@@ -0,0 +1,22 @@
+package cmd
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"io/ioutil"
+)
+
+func loadPrivateKey(path string) (*rsa.PrivateKey, error) {
+	privPem, err := ioutil.ReadFile(path)
+	if nil != err {
+		return nil, err
+	}
+	privDer, _ := pem.Decode(privPem)
+	privKey, err := x509.ParsePKCS1PrivateKey(privDer.Bytes)
+	if nil != err {
+		return nil, err
+	}
+
+	return privKey, nil
+}