1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
// Package speed implements the "-speed" command-line option,
// similar to "openssl speed".
// It benchmarks the crypto algorithms and libraries used by
// gocryptfs.
package speed
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"fmt"
"log"
"testing"
"golang.org/x/crypto/chacha20poly1305"
"github.com/rfjakob/gocryptfs/v2/internal/cryptocore"
"github.com/rfjakob/gocryptfs/v2/internal/siv_aead"
"github.com/rfjakob/gocryptfs/v2/internal/stupidgcm"
)
// 128-bit file ID + 64 bit block number = 192 bits = 24 bytes
const adLen = 24
// gocryptfs uses fixed-size 4 kiB blocks
const gocryptfsBlockSize = 4096
// Run - run the speed the test and print the results.
func Run() {
cpu := cpuModelName()
if cpu == "" {
cpu = "unknown"
}
aes := "; no AES acceleration"
if stupidgcm.CpuHasAES() {
aes = "; with AES acceleration"
}
fmt.Printf("cpu: %s%s\n", cpu, aes)
bTable := []struct {
name string
f func(*testing.B)
preferred bool
}{
{name: cryptocore.BackendOpenSSL.String(), f: bStupidGCM, preferred: stupidgcm.PreferOpenSSLAES256GCM()},
{name: cryptocore.BackendGoGCM.String(), f: bGoGCM, preferred: !stupidgcm.PreferOpenSSLAES256GCM()},
{name: cryptocore.BackendAESSIV.String(), f: bAESSIV, preferred: false},
{name: cryptocore.BackendXChaCha20Poly1305OpenSSL.String(), f: bStupidXchacha, preferred: stupidgcm.PreferOpenSSLXchacha20poly1305()},
{name: cryptocore.BackendXChaCha20Poly1305.String(), f: bXchacha20poly1305, preferred: !stupidgcm.PreferOpenSSLXchacha20poly1305()},
}
testing.Init()
for _, b := range bTable {
fmt.Printf("%-26s\t", b.name)
mbs := mbPerSec(testing.Benchmark(b.f))
if mbs > 0 {
fmt.Printf("%7.2f MB/s", mbs)
} else {
fmt.Printf(" N/A")
}
if b.preferred {
fmt.Printf("\t(selected in auto mode)\n")
} else {
fmt.Printf("\n")
}
}
}
func mbPerSec(r testing.BenchmarkResult) float64 {
if r.Bytes <= 0 || r.T <= 0 || r.N <= 0 {
return 0
}
return (float64(r.Bytes) * float64(r.N) / 1e6) / r.T.Seconds()
}
// Get "n" random bytes from /dev/urandom or panic
func randBytes(n int) []byte {
b := make([]byte, n)
_, err := rand.Read(b)
if err != nil {
log.Panic("Failed to read random bytes: " + err.Error())
}
return b
}
// bEncrypt benchmarks the encryption speed of cipher "c"
func bEncrypt(b *testing.B, c cipher.AEAD) {
bEncryptBlockSize(b, c, gocryptfsBlockSize)
}
// bEncryptBlockSize benchmarks the encryption speed of cipher "c" at block size "blockSize"
func bEncryptBlockSize(b *testing.B, c cipher.AEAD, blockSize int) {
authData := randBytes(adLen)
iv := randBytes(c.NonceSize())
in := make([]byte, blockSize)
dst := make([]byte, len(in)+len(iv)+c.Overhead())
copy(dst, iv)
b.SetBytes(int64(len(in)))
b.ResetTimer()
for i := 0; i < b.N; i++ {
// Reset dst buffer
dst = dst[:len(iv)]
// Encrypt and append to nonce
c.Seal(dst, iv, in, authData)
}
}
func bDecrypt(b *testing.B, c cipher.AEAD) {
authData := randBytes(adLen)
iv := randBytes(c.NonceSize())
plain := randBytes(gocryptfsBlockSize)
ciphertext := c.Seal(iv, iv, plain, authData)
b.SetBytes(int64(len(plain)))
b.ResetTimer()
for i := 0; i < b.N; i++ {
// Reset plain buffer
plain = plain[:0]
// Decrypt
_, err := c.Open(plain, iv, ciphertext[c.NonceSize():], authData)
if err != nil {
b.Fatal(err)
}
}
}
// bStupidGCM benchmarks stupidgcm's openssl GCM
func bStupidGCM(b *testing.B) {
if stupidgcm.BuiltWithoutOpenssl {
b.Skip("openssl has been disabled at compile-time")
}
bEncrypt(b, stupidgcm.NewAES256GCM(randBytes(32)))
}
// bGoGCM benchmarks Go stdlib GCM
func bGoGCM(b *testing.B) {
bGoGCMBlockSize(b, gocryptfsBlockSize)
}
func bGoGCMBlockSize(b *testing.B, blockSize int) {
gAES, err := aes.NewCipher(randBytes(32))
if err != nil {
b.Fatal(err)
}
gGCM, err := cipher.NewGCMWithNonceSize(gAES, 16)
if err != nil {
b.Fatal(err)
}
bEncryptBlockSize(b, gGCM, blockSize)
}
// bAESSIV benchmarks AES-SIV from github.com/aperturerobotics/jacobsa-crypto/siv
func bAESSIV(b *testing.B) {
c := siv_aead.New(randBytes(64))
bEncrypt(b, c)
}
// bXchacha20poly1305 benchmarks XChaCha20 from golang.org/x/crypto/chacha20poly1305
func bXchacha20poly1305(b *testing.B) {
c, _ := chacha20poly1305.NewX(randBytes(32))
bEncrypt(b, c)
}
// bStupidXchacha benchmarks OpenSSL XChaCha20
func bStupidXchacha(b *testing.B) {
if stupidgcm.BuiltWithoutOpenssl {
b.Skip("openssl has been disabled at compile-time")
}
bEncrypt(b, stupidgcm.NewXchacha20poly1305(randBytes(32)))
}
|
