From 8f269a6b16e03c80db1d823c86591177b533cc3a Mon Sep 17 00:00:00 2001
From: Tom Thorogood <me+github@tomthorogood.co.uk>
Date: Tue, 27 Nov 2018 21:36:27 +1030
Subject: [PATCH] Use strings.EqualFold rather than strings.ToLower (#828)

strings.ToLower may allocate and will do more work than
strings.EqualFold.
---
 dnssec.go | 2 +-
 sig0.go   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dnssec.go b/dnssec.go
index 26b512e7..c3491a18 100644
--- a/dnssec.go
+++ b/dnssec.go
@@ -401,7 +401,7 @@ func (rr *RRSIG) Verify(k *DNSKEY, rrset []RR) error {
 	if rr.Algorithm != k.Algorithm {
 		return ErrKey
 	}
-	if strings.ToLower(rr.SignerName) != strings.ToLower(k.Hdr.Name) {
+	if !strings.EqualFold(rr.SignerName, k.Hdr.Name) {
 		return ErrKey
 	}
 	if k.Protocol != 3 {
diff --git a/sig0.go b/sig0.go
index 07c2acb1..92b12b32 100644
--- a/sig0.go
+++ b/sig0.go
@@ -167,7 +167,7 @@ func (rr *SIG) Verify(k *KEY, buf []byte) error {
 	}
 	// If key has come from the DNS name compression might
 	// have mangled the case of the name
-	if strings.ToLower(signername) != strings.ToLower(k.Header().Name) {
+	if !strings.EqualFold(signername, k.Header().Name) {
 		return &Error{err: "signer name doesn't match key name"}
 	}
 	sigend := offset