rsa_bench

package bench

import (
	"crypto/tls"
	"crypto/x509"
	"testing"
	"time"

	"github.com/juju/juju/cert"
	gc "gopkg.in/check.v1"
)

func Test(t *testing.T) { gc.TestingT(t) }

type suite struct {
	caCert     tls.Certificate
	serverCert tls.Certificate
	certPool   *x509.CertPool
}

var _ = gc.Suite(&suite{})

func (s *suite) BenchmarkRSA1024(c *gc.C) {
	s.runBench(c, 1024)
}

func (s *suite) BenchmarkRSA2048(c *gc.C) {
	s.runBench(c, 2048)
}

func (s *suite) BenchmarkRSA4096(c *gc.C) {
	s.runBench(c, 4096)
}

func (s *suite) runBench(c *gc.C, bits int) {
	caCert, caKey, err := cert.NewCA("bobs", "bits", time.Now().Add(10*365*86400*time.Second))
	c.Assert(err, gc.IsNil)
	serverCert, serverKey, err := cert.NewDefaultServer(caCert, caKey, []string{"localhost", "127.0.0.1"})
	c.Assert(err, gc.IsNil)

	s.caCert, err = tls.X509KeyPair([]byte(caCert), []byte(caKey))
	c.Assert(err, gc.IsNil)
	s.serverCert, err = tls.X509KeyPair([]byte(serverCert), []byte(serverKey))
	c.Assert(err, gc.IsNil)

	caCertAsn1, err := x509.ParseCertificate(s.caCert.Certificate[0])
	c.Assert(err, gc.IsNil)
	s.certPool = x509.NewCertPool()
	s.certPool.AddCert(caCertAsn1)

	cert.KeyBits = bits
	l, err := tls.Listen("tcp", "localhost:0", &tls.Config{
		Certificates: []tls.Certificate{
			s.serverCert,
			s.caCert,
		}})
	defer l.Close()
	go func() {
		for {
			conn, err := l.Accept()
			if err != nil {
				return
			}
			conn.Read(nil)
			conn.Close()
		}
	}()
	c.Assert(err, gc.IsNil)
	clientConf := &tls.Config{
		RootCAs: s.certPool,
	}
	for i := 0; i < c.N; i++ {
		conn, err := tls.Dial("tcp", l.Addr().String(), clientConf)
		c.Assert(err, gc.IsNil)
		err = conn.Close()
		c.Assert(err, gc.IsNil)
	}
}

$ go test -check.b
PASS: bench_test.go:40: suite.BenchmarkRSA1024       500           5973122 ns/op
PASS: bench_test.go:44: suite.BenchmarkRSA2048       200           8614677 ns/op
PASS: bench_test.go:48: suite.BenchmarkRSA4096       100          25608863 ns/op
OK: 3 passed
PASS
ok      rsa-bench       18.076s

Actually, I had a mistake in my benchmark... These are the right numbers:

PASS: bench_test.go:23: suite.BenchmarkRSA1024       500           5917138 ns/op
PASS: bench_test.go:27: suite.BenchmarkRSA2048        50          26014933 ns/op
PASS: bench_test.go:31: suite.BenchmarkRSA4096         5        1882141855 ns/op
OK: 3 passed
PASS
ok      rsa-bench       14.781s