From 9291fdbf6a119092b067151fc1fd3a0fecc455d4 Mon Sep 17 00:00:00 2001
From: ston1th <ston1th@giftfish.de>
Date: Wed, 3 Jan 2018 21:17:56 +0100
Subject: [PATCH] better error message

---
 jwt.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/jwt.go b/jwt.go
index 947c89f..1bee7b3 100644
--- a/jwt.go
+++ b/jwt.go
@@ -23,7 +23,7 @@ const (
 )
 
 var (
-	ErrNoJWT               = errors.New("no json web token")
+	ErrNoJWT               = errors.New("not a json web token")
 	ErrUnsupportedAlg      = errors.New("unsupported algorithm")
 	ErrInvalid             = errors.New("token validation failed")
 	ErrBlacklisted         = errors.New("token blacklisted")
@@ -278,6 +278,14 @@ func DecodeToken(token string) (t *Token, err error) {
 	if len(parts) < 3 {
 		return nil, ErrMissingTokenParts
 	}
+	if len(parts) > 3 {
+		return nil, ErrNoJWT
+	}
+	for _, v := range parts {
+		if v == "" {
+			return nil, ErrNoJWT
+		}
+	}
 	t = new(Token)
 	header, err := base64.URLEncoding.DecodeString(parts[0])
 	if err != nil {