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package sarama
import (
"math/big"
"net"
"testing"
"time"
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"crypto/x509/pkix"
)
func TestTLS(t *testing.T) {
cakey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
t.Fatal(err)
}
clientkey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
t.Fatal(err)
}
hostkey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
t.Fatal(err)
}
nvb := time.Now().Add(-1 * time.Hour)
nva := time.Now().Add(1 * time.Hour)
caTemplate := &x509.Certificate{
Subject: pkix.Name{CommonName: "ca"},
Issuer: pkix.Name{CommonName: "ca"},
SerialNumber: big.NewInt(0),
NotAfter: nva,
NotBefore: nvb,
IsCA: true,
BasicConstraintsValid: true,
KeyUsage: x509.KeyUsageCertSign,
}
caDer, err := x509.CreateCertificate(rand.Reader, caTemplate, caTemplate, &cakey.PublicKey, cakey)
if err != nil {
t.Fatal(err)
}
caFinalCert, err := x509.ParseCertificate(caDer)
if err != nil {
t.Fatal(err)
}
hostDer, err := x509.CreateCertificate(rand.Reader, &x509.Certificate{
Subject: pkix.Name{CommonName: "host"},
Issuer: pkix.Name{CommonName: "ca"},
IPAddresses: []net.IP{net.IPv4(127, 0, 0, 1)},
SerialNumber: big.NewInt(0),
NotAfter: nva,
NotBefore: nvb,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
}, caFinalCert, &hostkey.PublicKey, cakey)
if err != nil {
t.Fatal(err)
}
clientDer, err := x509.CreateCertificate(rand.Reader, &x509.Certificate{
Subject: pkix.Name{CommonName: "client"},
Issuer: pkix.Name{CommonName: "ca"},
SerialNumber: big.NewInt(0),
NotAfter: nva,
NotBefore: nvb,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
}, caFinalCert, &clientkey.PublicKey, cakey)
if err != nil {
t.Fatal(err)
}
pool := x509.NewCertPool()
pool.AddCert(caFinalCert)
systemCerts, err := x509.SystemCertPool()
if err != nil {
t.Fatal(err)
}
// Keep server the same - it's the client that we're testing
serverTLSConfig := &tls.Config{
Certificates: []tls.Certificate{tls.Certificate{
Certificate: [][]byte{hostDer},
PrivateKey: hostkey,
}},
ClientAuth: tls.RequireAndVerifyClientCert,
ClientCAs: pool,
}
for _, tc := range []struct {
Succeed bool
Server, Client *tls.Config
}{
{ // Verify client fails if wrong CA cert pool is specified
Succeed: false,
Server: serverTLSConfig,
Client: &tls.Config{
RootCAs: systemCerts,
Certificates: []tls.Certificate{tls.Certificate{
Certificate: [][]byte{clientDer},
PrivateKey: clientkey,
}},
},
},
{ // Verify client fails if wrong key is specified
Succeed: false,
Server: serverTLSConfig,
Client: &tls.Config{
RootCAs: pool,
Certificates: []tls.Certificate{tls.Certificate{
Certificate: [][]byte{clientDer},
PrivateKey: hostkey,
}},
},
},
{ // Verify client fails if wrong cert is specified
Succeed: false,
Server: serverTLSConfig,
Client: &tls.Config{
RootCAs: pool,
Certificates: []tls.Certificate{tls.Certificate{
Certificate: [][]byte{hostDer},
PrivateKey: clientkey,
}},
},
},
{ // Verify client fails if no CAs are specified
Succeed: false,
Server: serverTLSConfig,
Client: &tls.Config{
Certificates: []tls.Certificate{tls.Certificate{
Certificate: [][]byte{clientDer},
PrivateKey: clientkey,
}},
},
},
{ // Verify client fails if no keys are specified
Succeed: false,
Server: serverTLSConfig,
Client: &tls.Config{
RootCAs: pool,
},
},
{ // Finally, verify it all works happily with client and server cert in place
Succeed: true,
Server: serverTLSConfig,
Client: &tls.Config{
RootCAs: pool,
Certificates: []tls.Certificate{tls.Certificate{
Certificate: [][]byte{clientDer},
PrivateKey: clientkey,
}},
},
},
} {
doListenerTLSTest(t, tc.Succeed, tc.Server, tc.Client)
}
}
func doListenerTLSTest(t *testing.T, expectSuccess bool, serverConfig, clientConfig *tls.Config) {
serverConfig.BuildNameToCertificate()
clientConfig.BuildNameToCertificate()
seedListener, err := tls.Listen("tcp", "127.0.0.1:0", serverConfig)
if err != nil {
t.Fatal("cannot open listener", err)
}
var childT *testing.T
if expectSuccess {
childT = t
} else {
childT = &testing.T{} // we want to swallow errors
}
seedBroker := NewMockBrokerListener(childT, 1, seedListener)
defer seedBroker.Close()
seedBroker.Returns(new(MetadataResponse))
config := NewConfig()
config.Net.TLS.Enable = true
config.Net.TLS.Config = clientConfig
client, err := NewClient([]string{seedBroker.Addr()}, config)
if err == nil {
safeClose(t, client)
}
if expectSuccess {
if err != nil {
t.Fatal(err)
}
} else {
if err == nil {
t.Fatal("expected failure")
}
}
}
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