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package benchmark
// Benchmark go built-int GCM against spacemonkey openssl bindings
//
// Run benchmark:
// go test -bench=.
import (
"fmt"
"os"
"bytes"
"crypto/aes"
"crypto/cipher"
"github.com/spacemonkeygo/openssl"
"testing"
"github.com/rfjakob/gocryptfs/cryptfs"
)
func TestMain(m *testing.M) {
fmt.Printf("Benchmarking AES-GCM-%d with 4kB block size\n", cryptfs.KEY_LEN*8)
r := m.Run()
os.Exit(r)
}
func BenchmarkGoEnc4K(b *testing.B) {
buf := make([]byte, 1024*4)
b.SetBytes(int64(len(buf)))
var key [cryptfs.KEY_LEN]byte
var nonce [12]byte
aes, _ := aes.NewCipher(key[:])
aesgcm, _ := cipher.NewGCM(aes)
var out []byte
b.ResetTimer()
for i := 0; i < b.N; i++ {
out = aesgcm.Seal(out[:0], nonce[:], buf, nil)
}
}
func BenchmarkGoDec4K(b *testing.B) {
buf := make([]byte, 1024*4)
b.SetBytes(int64(len(buf)))
var key [cryptfs.KEY_LEN]byte
var nonce [12]byte
aes, _ := aes.NewCipher(key[:])
aesgcm, _ := cipher.NewGCM(aes)
var out []byte
out = aesgcm.Seal(out[:0], nonce[:], buf, nil)
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, err := aesgcm.Open(buf[:0], nonce[:], out, nil)
if err != nil {
b.Errorf("Open: %v", err)
}
}
}
func BenchmarkOpensslEnc4K(b *testing.B) {
buf := make([]byte, 1024*4)
b.SetBytes(int64(len(buf)))
var key [cryptfs.KEY_LEN]byte
var nonce [12]byte
var ciphertext bytes.Buffer
var part []byte
b.ResetTimer()
for i := 0; i < b.N; i++ {
ciphertext.Reset()
ectx, err := openssl.NewGCMEncryptionCipherCtx(cryptfs.KEY_LEN*8, nil, key[:], nonce[:])
if err != nil {
b.FailNow()
}
part, err = ectx.EncryptUpdate(buf)
if err != nil {
b.FailNow()
}
ciphertext.Write(part)
part, err = ectx.EncryptFinal()
if err != nil {
b.FailNow()
}
ciphertext.Write(part)
part, err = ectx.GetTag()
if err != nil {
b.FailNow()
}
ciphertext.Write(part)
}
}
func BenchmarkOpensslDec4K(b *testing.B) {
buf := makeOpensslCiphertext()
b.SetBytes(int64(1024 * 4))
tag := buf[4096:]
buf = buf[0:4096]
var key [cryptfs.KEY_LEN]byte
var nonce [12]byte
var plaintext bytes.Buffer
var part []byte
b.ResetTimer()
for i := 0; i < b.N; i++ {
plaintext.Reset()
dctx, err := openssl.NewGCMDecryptionCipherCtx(cryptfs.KEY_LEN*8, nil, key[:], nonce[:])
if err != nil {
b.FailNow()
}
part, err = dctx.DecryptUpdate(buf)
if err != nil {
b.FailNow()
}
plaintext.Write(part)
err = dctx.SetTag(tag)
if err != nil {
b.FailNow()
}
part, err = dctx.DecryptFinal()
if err != nil {
b.FailNow()
}
plaintext.Write(part)
}
}
func makeOpensslCiphertext() []byte {
buf := make([]byte, 1024*4)
var key [cryptfs.KEY_LEN]byte
var nonce [12]byte
var ciphertext bytes.Buffer
var part []byte
ectx, _ := openssl.NewGCMEncryptionCipherCtx(cryptfs.KEY_LEN*8, nil, key[:], nonce[:])
part, _ = ectx.EncryptUpdate(buf)
ciphertext.Write(part)
part, _ = ectx.EncryptFinal()
ciphertext.Write(part)
part, _ = ectx.GetTag()
ciphertext.Write(part)
return ciphertext.Bytes()
}
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