From ea3010d994c927907fda2d742799f5629cdf9265 Mon Sep 17 00:00:00 2001
From: dchaofei <dchaofei@gmail.com>
Date: Thu, 19 May 2022 02:02:50 +0000
Subject: [PATCH] crypto/x509: optimize the performance of checkSignature

The loop should be terminated immediately when `algo` has been found

Fixes #52955

Change-Id: Ib3865c4616a0c1af9b72daea45f5a1750f84562f
GitHub-Last-Rev: 721322725fb2d3a3ea410d09fd8320dfef865d8d
GitHub-Pull-Request: golang/go#52987
Reviewed-on: https://go-review.googlesource.com/c/go/+/407215
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>
---
 src/crypto/x509/x509.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/crypto/x509/x509.go b/src/crypto/x509/x509.go
index b2e31f76b4..c710655304 100644
--- a/src/crypto/x509/x509.go
+++ b/src/crypto/x509/x509.go
@@ -889,6 +889,7 @@ func checkSignature(algo SignatureAlgorithm, signed, signature []byte, publicKey
 		if details.algo == algo {
 			hashType = details.hash
 			pubKeyAlgo = details.pubKeyAlgo
+			break
 		}
 	}
 
-- 
2.50.0