From 1d2ac1e589209be96f8ee5fbba9a18e7e2c5fb04 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Wed, 26 May 2021 09:20:22 +0200
Subject: stupidgcm: prefer Go stdlib over OpenSSL on Apple M1

https://github.com/rfjakob/gocryptfs/issues/556
---
 internal/stupidgcm/prefer.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'internal')

diff --git a/internal/stupidgcm/prefer.go b/internal/stupidgcm/prefer.go
index c067d09..bacd56a 100644
--- a/internal/stupidgcm/prefer.go
+++ b/internal/stupidgcm/prefer.go
@@ -1,6 +1,8 @@
 package stupidgcm
 
 import (
+	"runtime"
+
 	"golang.org/x/sys/cpu"
 )
 
@@ -23,6 +25,11 @@ func PreferOpenSSL() bool {
 		// Go stdlib is probably faster
 		return false
 	}
-	// Openssl is probably faster
+	// On the Apple M1, Go stdlib is faster than OpenSSL, despite cpu.ARM64.HasAES
+	// reading false: https://github.com/rfjakob/gocryptfs/issues/556#issuecomment-848079309
+	if runtime.GOOS == "darwin" && runtime.GOARCH == "arm64" {
+		return false
+	}
+	// OpenSSL is probably faster
 	return true
 }
-- 
cgit v1.2.3