1 files changed, 137 insertions, 0 deletions
diff --git a/src/crypto/cipher/benchmark_test.go b/src/crypto/cipher/benchmark_test.go
new file mode 100644
index 0000000..eb02cd0
--- /dev/null
+++ b/src/crypto/cipher/benchmark_test.go
@@ -0,0 +1,137 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cipher_test
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"strconv"
+	"testing"
+)
+
+func benchmarkAESGCMSeal(b *testing.B, buf []byte, keySize int) {
+	b.ReportAllocs()
+	b.SetBytes(int64(len(buf)))
+
+	var key = make([]byte, keySize)
+	var nonce [12]byte
+	var ad [13]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, ad[:])
+	}
+}
+
+func benchmarkAESGCMOpen(b *testing.B, buf []byte, keySize int) {
+	b.ReportAllocs()
+	b.SetBytes(int64(len(buf)))
+
+	var key = make([]byte, keySize)
+	var nonce [12]byte
+	var ad [13]byte
+	aes, _ := aes.NewCipher(key[:])
+	aesgcm, _ := cipher.NewGCM(aes)
+	var out []byte
+
+	ct := aesgcm.Seal(nil, nonce[:], buf[:], ad[:])
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		out, _ = aesgcm.Open(out[:0], nonce[:], ct, ad[:])
+	}
+}
+
+func BenchmarkAESGCM(b *testing.B) {
+	for _, length := range []int{64, 1350, 8 * 1024} {
+		b.Run("Open-128-"+strconv.Itoa(length), func(b *testing.B) {
+			benchmarkAESGCMOpen(b, make([]byte, length), 128/8)
+		})
+		b.Run("Seal-128-"+strconv.Itoa(length), func(b *testing.B) {
+			benchmarkAESGCMSeal(b, make([]byte, length), 128/8)
+		})
+
+		b.Run("Open-256-"+strconv.Itoa(length), func(b *testing.B) {
+			benchmarkAESGCMOpen(b, make([]byte, length), 256/8)
+		})
+		b.Run("Seal-256-"+strconv.Itoa(length), func(b *testing.B) {
+			benchmarkAESGCMSeal(b, make([]byte, length), 256/8)
+		})
+	}
+}
+
+func benchmarkAESStream(b *testing.B, mode func(cipher.Block, []byte) cipher.Stream, buf []byte) {
+	b.SetBytes(int64(len(buf)))
+
+	var key [16]byte
+	var iv [16]byte
+	aes, _ := aes.NewCipher(key[:])
+	stream := mode(aes, iv[:])
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		stream.XORKeyStream(buf, buf)
+	}
+}
+
+// If we test exactly 1K blocks, we would generate exact multiples of
+// the cipher's block size, and the cipher stream fragments would
+// always be wordsize aligned, whereas non-aligned is a more typical
+// use-case.
+const almost1K = 1024 - 5
+const almost8K = 8*1024 - 5
+
+func BenchmarkAESCFBEncrypt1K(b *testing.B) {
+	benchmarkAESStream(b, cipher.NewCFBEncrypter, make([]byte, almost1K))
+}
+
+func BenchmarkAESCFBDecrypt1K(b *testing.B) {
+	benchmarkAESStream(b, cipher.NewCFBDecrypter, make([]byte, almost1K))
+}
+
+func BenchmarkAESCFBDecrypt8K(b *testing.B) {
+	benchmarkAESStream(b, cipher.NewCFBDecrypter, make([]byte, almost8K))
+}
+
+func BenchmarkAESOFB1K(b *testing.B) {
+	benchmarkAESStream(b, cipher.NewOFB, make([]byte, almost1K))
+}
+
+func BenchmarkAESCTR1K(b *testing.B) {
+	benchmarkAESStream(b, cipher.NewCTR, make([]byte, almost1K))
+}
+
+func BenchmarkAESCTR8K(b *testing.B) {
+	benchmarkAESStream(b, cipher.NewCTR, make([]byte, almost8K))
+}
+
+func BenchmarkAESCBCEncrypt1K(b *testing.B) {
+	buf := make([]byte, 1024)
+	b.SetBytes(int64(len(buf)))
+
+	var key [16]byte
+	var iv [16]byte
+	aes, _ := aes.NewCipher(key[:])
+	cbc := cipher.NewCBCEncrypter(aes, iv[:])
+	for i := 0; i < b.N; i++ {
+		cbc.CryptBlocks(buf, buf)
+	}
+}
+
+func BenchmarkAESCBCDecrypt1K(b *testing.B) {
+	buf := make([]byte, 1024)
+	b.SetBytes(int64(len(buf)))
+
+	var key [16]byte
+	var iv [16]byte
+	aes, _ := aes.NewCipher(key[:])
+	cbc := cipher.NewCBCDecrypter(aes, iv[:])
+	for i := 0; i < b.N; i++ {
+		cbc.CryptBlocks(buf, buf)
+	}
+}