From 10b3e2a26565ffcc709bd22017b77b00aaab6b6a Mon Sep 17 00:00:00 2001
From: Marten Seemann <martenseemann@gmail.com>
Date: Sun, 10 Feb 2019 15:06:26 +0800
Subject: [PATCH] avoid using interface{} when generating certificates

---
 p2p/security/tls/crypto.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/p2p/security/tls/crypto.go b/p2p/security/tls/crypto.go
index 583fe39c..23178fa9 100644
--- a/p2p/security/tls/crypto.go
+++ b/p2p/security/tls/crypto.go
@@ -1,6 +1,7 @@
 package libp2ptls
 
 import (
+	"crypto"
 	"crypto/rand"
 	"crypto/tls"
 	"crypto/x509"
@@ -104,7 +105,7 @@ func getRemotePubKey(chain []*x509.Certificate) (ic.PubKey, error) {
 	}
 }
 
-func keyToCertificate(sk ic.PrivKey) (interface{}, *x509.Certificate, error) {
+func keyToCertificate(sk ic.PrivKey) (crypto.PrivateKey, *x509.Certificate, error) {
 	sn, err := rand.Int(rand.Reader, big.NewInt(1<<62))
 	if err != nil {
 		return nil, nil, err
@@ -115,7 +116,8 @@ func keyToCertificate(sk ic.PrivKey) (interface{}, *x509.Certificate, error) {
 		NotAfter:     time.Now().Add(certValidityPeriod),
 	}
 
-	var publicKey, privateKey interface{}
+	var privateKey crypto.PrivateKey
+	var publicKey crypto.PublicKey
 	keyBytes, err := sk.Bytes()
 	if err != nil {
 		return nil, nil, err