From 801d2ec66644fb9bf155963c4c7f92389bb3f35b Mon Sep 17 00:00:00 2001
From: chao <chao@harmony.one>
Date: Sat, 15 Jun 2019 22:40:21 -0700
Subject: [PATCH] add nil pointer protection when deserialize pubkey

---
 crypto/bls/bls.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/crypto/bls/bls.go b/crypto/bls/bls.go
index 1cc3d8d36..0d7ecdac6 100644
--- a/crypto/bls/bls.go
+++ b/crypto/bls/bls.go
@@ -2,6 +2,7 @@ package bls
 
 import (
 	"errors"
+	"fmt"
 
 	"github.com/harmony-one/bls/ffi/go/bls"
 	"github.com/harmony-one/harmony/internal/ctxerror"
@@ -20,6 +21,9 @@ func RandPrivateKey() *bls.SecretKey {
 
 // BytesToBlsPublicKey converts bytes into bls.PublicKey pointer.
 func BytesToBlsPublicKey(bytes []byte) (*bls.PublicKey, error) {
+	if len(bytes) == 0 {
+		return nil, fmt.Errorf("[BytesToBlsPublicKey] bytes is empty")
+	}
 	pubKey := &bls.PublicKey{}
 	err := pubKey.Deserialize(bytes)
 	return pubKey, err