From 8d8a1ec5756d44d6f9ed5b1613504d6dc30af34e Mon Sep 17 00:00:00 2001
From: Pavel Odintsov <pavel.odintsov@gmail.com>
Date: Mon, 3 Oct 2016 17:36:51 +0300
Subject: [PATCH] Check input data for NewPrivateKey (#399)

---
 dnssec_keyscan.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dnssec_keyscan.go b/dnssec_keyscan.go
index c0b54dc7..9ff3a617 100644
--- a/dnssec_keyscan.go
+++ b/dnssec_keyscan.go
@@ -14,7 +14,7 @@ import (
 // NewPrivateKey returns a PrivateKey by parsing the string s.
 // s should be in the same form of the BIND private key files.
 func (k *DNSKEY) NewPrivateKey(s string) (crypto.PrivateKey, error) {
-	if s[len(s)-1] != '\n' { // We need a closing newline
+	if s == "" || s[len(s)-1] != '\n' { // We need a closing newline
 		return k.ReadPrivateKey(strings.NewReader(s+"\n"), "")
 	}
 	return k.ReadPrivateKey(strings.NewReader(s), "")