From 49b597f07c07bde6a2feb1f32f02fcaf34daf365 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Wed, 11 May 2016 23:36:57 +0200
Subject: prefer_openssl: autodetect whether to use OpenSSL or Go GCM

Go GCM is faster than OpenSSL if the CPU has AES instructions
and you are running Go 1.6+.

The "-openssl" option now defaults to "auto".

"gocryptfs -debug -version" displays the result of the autodetection.

See https://github.com/rfjakob/gocryptfs/issues/23 for details and
benchmarks.
---
 internal/prefer_openssl/prefer_test.go | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 internal/prefer_openssl/prefer_test.go

(limited to 'internal/prefer_openssl/prefer_test.go')

diff --git a/internal/prefer_openssl/prefer_test.go b/internal/prefer_openssl/prefer_test.go
new file mode 100644
index 0000000..a2ed737
--- /dev/null
+++ b/internal/prefer_openssl/prefer_test.go
@@ -0,0 +1,23 @@
+package prefer_openssl
+
+import (
+	"testing"
+)
+
+func TestCurrentCPU(t *testing.T) {
+	t.Logf("PreferOpenSSL=%v", PreferOpenSSL())
+}
+
+// Has AES instructions
+func TestXeonE312xx(t *testing.T) {
+	if filePreferOpenSSL("cpuinfo.xeon_e312xx.txt") == true {
+		t.Fail()
+	}
+}
+
+// Pentium G do not have AES instructions
+func TestPentiumG630(t *testing.T) {
+	if filePreferOpenSSL("cpuinfo.pentium_g630.txt") == false {
+		t.Fail()
+	}
+}
-- 
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