Protype Candidate

mac.go

@@ -0,0 +1,14 @@
+package elect
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"fmt"
+)
+
+func mac(payload, signingKey []byte) string {
+	gen := hmac.New(sha256.New, signingKey)
+	gen.Write(payload)
+
+	return fmt.Sprintf("%x", gen.Sum(nil))
+}