From 58d1e24b7c4eb69376dd0ec230c42ea9aeb70f2d Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 6 Sep 2015 10:38:43 +0200
Subject: Add OpenSSL support for file content encryption/decryption

This brings streaming read performance from 30MB/s to 81MB/s
(similar improvement for writes)
---
 cryptfs/cryptfs.go | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

(limited to 'cryptfs/cryptfs.go')

diff --git a/cryptfs/cryptfs.go b/cryptfs/cryptfs.go
index 9ec511a..40a9024 100644
--- a/cryptfs/cryptfs.go
+++ b/cryptfs/cryptfs.go
@@ -20,21 +20,26 @@ type CryptFS struct {
 	cipherBS uint64
 }
 
-func NewCryptFS(key [16]byte) *CryptFS {
+func NewCryptFS(key [16]byte, useOpenssl bool) *CryptFS {
 
 	b, err := aes.NewCipher(key[:])
 	if err != nil {
 		panic(err)
 	}
 
-	g, err := cipher.NewGCM(b)
-	if err != nil {
-		panic(err)
+	var gcm cipher.AEAD
+	if useOpenssl {
+		gcm = opensslGCM{key}
+	} else {
+		gcm, err = cipher.NewGCM(b)
+		if err != nil {
+			panic(err)
+		}
 	}
 
 	return &CryptFS{
 		blockCipher: b,
-		gcm: g,
+		gcm: gcm,
 		plainBS: DEFAULT_PLAINBS,
 		cipherBS: DEFAULT_PLAINBS + NONCE_LEN + AUTH_TAG_LEN,
 	}
-- 
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