From 194030f18ae623fbf5b0bb805b780f81fe9ec7a7 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sat, 29 Feb 2020 21:27:05 +0100
Subject: speed: add XChaCha20-Poly1305-Go

https://github.com/rfjakob/gocryptfs/issues/452
---
 internal/speed/speed.go | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'internal/speed')

diff --git a/internal/speed/speed.go b/internal/speed/speed.go
index 2f1e0f6..6cfe511 100644
--- a/internal/speed/speed.go
+++ b/internal/speed/speed.go
@@ -12,6 +12,8 @@ import (
 	"log"
 	"testing"
 
+	"golang.org/x/crypto/chacha20poly1305"
+
 	"github.com/rfjakob/gocryptfs/internal/siv_aead"
 	"github.com/rfjakob/gocryptfs/internal/stupidgcm"
 )
@@ -32,6 +34,7 @@ func Run() {
 		{name: "AES-GCM-256-OpenSSL", f: bStupidGCM, preferred: stupidgcm.PreferOpenSSL()},
 		{name: "AES-GCM-256-Go", f: bGoGCM, preferred: !stupidgcm.PreferOpenSSL()},
 		{name: "AES-SIV-512-Go", f: bAESSIV, preferred: false},
+		{name: "XChaCha20-Poly1305-Go", f: bChacha20poly1305, preferred: false},
 	}
 	for _, b := range bTable {
 		fmt.Printf("%-20s\t", b.name)
@@ -125,3 +128,19 @@ func bAESSIV(b *testing.B) {
 		gGCM.Seal(iv, iv, in, authData)
 	}
 }
+
+// bChacha20poly1305 benchmarks XChaCha20 from golang.org/x/crypto/chacha20poly1305
+func bChacha20poly1305(b *testing.B) {
+	key := randBytes(32)
+	authData := randBytes(adLen)
+	iv := randBytes(chacha20poly1305.NonceSizeX)
+	in := make([]byte, blockSize)
+	b.SetBytes(int64(len(in)))
+	c, _ := chacha20poly1305.NewX(key)
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		// Encrypt and append to nonce
+		c.Seal(iv, iv, in, authData)
+	}
+}
-- 
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