traefik/pkg/server/service/roundtripper_test.go

552 lines
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package service
import (
"crypto/rand"
"crypto/rsa"
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"crypto/tls"
"crypto/x509"
"crypto/x509/pkix"
"math/big"
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"net"
"net/http"
"net/http/httptest"
"net/url"
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"sync/atomic"
"testing"
"time"
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"github.com/spiffe/go-spiffe/v2/bundle/x509bundle"
"github.com/spiffe/go-spiffe/v2/spiffeid"
"github.com/spiffe/go-spiffe/v2/spiffetls/tlsconfig"
"github.com/spiffe/go-spiffe/v2/svid/x509svid"
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"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
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"github.com/traefik/traefik/v3/pkg/config/dynamic"
traefiktls "github.com/traefik/traefik/v3/pkg/tls"
"github.com/traefik/traefik/v3/pkg/types"
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)
func Int32(i int32) *int32 {
return &i
}
// LocalhostCert is a PEM-encoded TLS cert
// for host example.com, www.example.com
// expiring at Jan 29 16:00:00 2084 GMT.
// go run $GOROOT/src/crypto/tls/generate_cert.go --rsa-bits 1024 --host example.com,www.example.com --ca --start-date "Jan 1 00:00:00 1970" --duration=1000000h
var LocalhostCert = []byte(`-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`)
// LocalhostKey is the private key for localhostCert.
var LocalhostKey = []byte(`-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`)
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// openssl req -newkey rsa:2048 \
// -new -nodes -x509 \
// -days 3650 \
// -out cert.pem \
// -keyout key.pem \
// -subj "/CN=example.com"
// -addext "subjectAltName = DNS:example.com"
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var mTLSCert = []byte(`-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`)
var mTLSKey = []byte(`-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`)
func TestKeepConnectionWhenSameConfiguration(t *testing.T) {
srv := httptest.NewUnstartedServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusOK)
}))
connCount := Int32(0)
srv.Config.ConnState = func(conn net.Conn, state http.ConnState) {
if state == http.StateNew {
atomic.AddInt32(connCount, 1)
}
}
cert, err := tls.X509KeyPair(LocalhostCert, LocalhostKey)
require.NoError(t, err)
srv.TLS = &tls.Config{Certificates: []tls.Certificate{cert}}
srv.StartTLS()
rtManager := NewRoundTripperManager(nil)
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dynamicConf := map[string]*dynamic.ServersTransport{
"test": {
ServerName: "example.com",
RootCAs: []types.FileOrContent{types.FileOrContent(LocalhostCert)},
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},
}
for i := 0; i < 10; i++ {
rtManager.Update(dynamicConf)
tr, err := rtManager.Get("test")
require.NoError(t, err)
client := http.Client{Transport: tr}
resp, err := client.Get(srv.URL)
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
}
count := atomic.LoadInt32(connCount)
require.EqualValues(t, 1, count)
dynamicConf = map[string]*dynamic.ServersTransport{
"test": {
ServerName: "www.example.com",
RootCAs: []types.FileOrContent{types.FileOrContent(LocalhostCert)},
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},
}
rtManager.Update(dynamicConf)
tr, err := rtManager.Get("test")
require.NoError(t, err)
client := http.Client{Transport: tr}
resp, err := client.Get(srv.URL)
require.NoError(t, err)
require.Equal(t, http.StatusOK, resp.StatusCode)
count = atomic.LoadInt32(connCount)
assert.EqualValues(t, 2, count)
}
func TestMTLS(t *testing.T) {
srv := httptest.NewUnstartedServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusOK)
}))
cert, err := tls.X509KeyPair(LocalhostCert, LocalhostKey)
require.NoError(t, err)
clientPool := x509.NewCertPool()
clientPool.AppendCertsFromPEM(mTLSCert)
srv.TLS = &tls.Config{
// For TLS
Certificates: []tls.Certificate{cert},
// For mTLS
ClientAuth: tls.RequireAndVerifyClientCert,
ClientCAs: clientPool,
}
srv.StartTLS()
rtManager := NewRoundTripperManager(nil)
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dynamicConf := map[string]*dynamic.ServersTransport{
"test": {
ServerName: "example.com",
// For TLS
RootCAs: []types.FileOrContent{types.FileOrContent(LocalhostCert)},
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// For mTLS
Certificates: traefiktls.Certificates{
traefiktls.Certificate{
CertFile: types.FileOrContent(mTLSCert),
KeyFile: types.FileOrContent(mTLSKey),
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},
},
},
}
rtManager.Update(dynamicConf)
tr, err := rtManager.Get("test")
require.NoError(t, err)
client := http.Client{Transport: tr}
resp, err := client.Get(srv.URL)
require.NoError(t, err)
assert.Equal(t, http.StatusOK, resp.StatusCode)
}
func TestSpiffeMTLS(t *testing.T) {
srv := httptest.NewUnstartedServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusOK)
}))
trustDomain := spiffeid.RequireTrustDomainFromString("spiffe://traefik.test")
pki, err := newFakeSpiffePKI(trustDomain)
require.NoError(t, err)
clientSVID, err := pki.genSVID(spiffeid.RequireFromPath(trustDomain, "/client"))
require.NoError(t, err)
serverSVID, err := pki.genSVID(spiffeid.RequireFromPath(trustDomain, "/server"))
require.NoError(t, err)
serverSource := fakeSpiffeSource{
svid: serverSVID,
bundle: pki.bundle,
}
// go-spiffe's `tlsconfig.MTLSServerConfig` (that should be used here) does not set a certificate on
// the returned `tls.Config` and relies instead on `GetCertificate` being always called.
// But it turns out that `StartTLS` from `httptest.Server`, enforces a default certificate
// if no certificate is previously set on the configured TLS config.
// It makes the test server always serve the httptest default certificate, and not the SPIFFE certificate,
// as GetCertificate is in that case never called (there's a default cert, and SNI is not used).
// To bypass this issue, we're manually extracting the server ceritificate from the server SVID
// and use another initialization method that forces serving the server SPIFFE certificate.
serverCert, err := tlsconfig.GetCertificate(&serverSource)(nil)
require.NoError(t, err)
srv.TLS = tlsconfig.MTLSWebServerConfig(
serverCert,
&serverSource,
tlsconfig.AuthorizeAny(),
)
srv.StartTLS()
defer srv.Close()
clientSource := fakeSpiffeSource{
svid: clientSVID,
bundle: pki.bundle,
}
testCases := []struct {
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desc string
config dynamic.Spiffe
clientSource SpiffeX509Source
wantStatusCode int
wantError bool
}{
{
desc: "supports SPIFFE mTLS",
config: dynamic.Spiffe{},
clientSource: &clientSource,
wantStatusCode: http.StatusOK,
},
{
desc: "allows expected server SPIFFE ID",
config: dynamic.Spiffe{
IDs: []string{"spiffe://traefik.test/server"},
},
clientSource: &clientSource,
wantStatusCode: http.StatusOK,
},
{
desc: "blocks unexpected server SPIFFE ID",
config: dynamic.Spiffe{
IDs: []string{"spiffe://traefik.test/not-server"},
},
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clientSource: &clientSource,
wantError: true,
},
{
desc: "allows expected server trust domain",
config: dynamic.Spiffe{
TrustDomain: "spiffe://traefik.test",
},
clientSource: &clientSource,
wantStatusCode: http.StatusOK,
},
{
desc: "denies unexpected server trust domain",
config: dynamic.Spiffe{
TrustDomain: "spiffe://not-traefik.test",
},
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clientSource: &clientSource,
wantError: true,
},
{
desc: "spiffe IDs allowlist takes precedence",
config: dynamic.Spiffe{
IDs: []string{"spiffe://traefik.test/not-server"},
TrustDomain: "spiffe://not-traefik.test",
},
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clientSource: &clientSource,
wantError: true,
},
{
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desc: "raises an error when spiffe is enabled on the transport but no workloadapi address is given",
config: dynamic.Spiffe{},
clientSource: nil,
wantError: true,
},
}
for _, test := range testCases {
t.Run(test.desc, func(t *testing.T) {
rtManager := NewRoundTripperManager(test.clientSource)
dynamicConf := map[string]*dynamic.ServersTransport{
"test": {
Spiffe: &test.config,
},
}
rtManager.Update(dynamicConf)
tr, err := rtManager.Get("test")
require.NoError(t, err)
client := http.Client{Transport: tr}
resp, err := client.Get(srv.URL)
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if test.wantError {
require.Error(t, err)
return
}
require.NoError(t, err)
assert.Equal(t, test.wantStatusCode, resp.StatusCode)
})
}
}
func TestDisableHTTP2(t *testing.T) {
testCases := []struct {
desc string
disableHTTP2 bool
serverHTTP2 bool
expectedProto string
}{
{
desc: "HTTP1 capable client with HTTP1 server",
disableHTTP2: true,
expectedProto: "HTTP/1.1",
},
{
desc: "HTTP1 capable client with HTTP2 server",
disableHTTP2: true,
serverHTTP2: true,
expectedProto: "HTTP/1.1",
},
{
desc: "HTTP2 capable client with HTTP1 server",
expectedProto: "HTTP/1.1",
},
{
desc: "HTTP2 capable client with HTTP2 server",
serverHTTP2: true,
expectedProto: "HTTP/2.0",
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
srv := httptest.NewUnstartedServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
rw.WriteHeader(http.StatusOK)
}))
srv.EnableHTTP2 = test.serverHTTP2
srv.StartTLS()
rtManager := NewRoundTripperManager(nil)
dynamicConf := map[string]*dynamic.ServersTransport{
"test": {
DisableHTTP2: test.disableHTTP2,
InsecureSkipVerify: true,
},
}
rtManager.Update(dynamicConf)
tr, err := rtManager.Get("test")
require.NoError(t, err)
client := http.Client{Transport: tr}
resp, err := client.Get(srv.URL)
require.NoError(t, err)
assert.Equal(t, http.StatusOK, resp.StatusCode)
assert.Equal(t, test.expectedProto, resp.Proto)
})
}
}
// fakeSpiffePKI simulates a SPIFFE aware PKI and allows generating multiple valid SVIDs.
type fakeSpiffePKI struct {
caPrivateKey *rsa.PrivateKey
bundle *x509bundle.Bundle
}
func newFakeSpiffePKI(trustDomain spiffeid.TrustDomain) (fakeSpiffePKI, error) {
caPrivateKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return fakeSpiffePKI{}, err
}
caTemplate := x509.Certificate{
SerialNumber: big.NewInt(2000),
Subject: pkix.Name{
Organization: []string{"spiffe"},
},
URIs: []*url.URL{spiffeid.RequireFromPath(trustDomain, "/ca").URL()},
NotBefore: time.Now(),
NotAfter: time.Now().Add(time.Hour),
SubjectKeyId: []byte("ca"),
KeyUsage: x509.KeyUsageCertSign |
x509.KeyUsageCRLSign,
BasicConstraintsValid: true,
IsCA: true,
PublicKey: caPrivateKey.Public(),
}
caCertDER, err := x509.CreateCertificate(
rand.Reader,
&caTemplate,
&caTemplate,
caPrivateKey.Public(),
caPrivateKey,
)
if err != nil {
return fakeSpiffePKI{}, err
}
bundle, err := x509bundle.ParseRaw(
trustDomain,
caCertDER,
)
if err != nil {
return fakeSpiffePKI{}, err
}
return fakeSpiffePKI{
bundle: bundle,
caPrivateKey: caPrivateKey,
}, nil
}
func (f *fakeSpiffePKI) genSVID(id spiffeid.ID) (*x509svid.SVID, error) {
privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return nil, err
}
template := x509.Certificate{
SerialNumber: big.NewInt(200001),
URIs: []*url.URL{id.URL()},
NotBefore: time.Now(),
NotAfter: time.Now().Add(time.Hour),
SubjectKeyId: []byte("svid"),
KeyUsage: x509.KeyUsageKeyEncipherment |
x509.KeyUsageKeyAgreement |
x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{
x509.ExtKeyUsageServerAuth,
x509.ExtKeyUsageClientAuth,
},
BasicConstraintsValid: true,
PublicKey: privateKey.PublicKey,
}
certDER, err := x509.CreateCertificate(
rand.Reader,
&template,
f.bundle.X509Authorities()[0],
privateKey.Public(),
f.caPrivateKey,
)
if err != nil {
return nil, err
}
keyPKCS8, err := x509.MarshalPKCS8PrivateKey(privateKey)
if err != nil {
return nil, err
}
return x509svid.ParseRaw(certDER, keyPKCS8)
}
// fakeSpiffeSource allows retrieving staticly an SVID and its associated bundle.
type fakeSpiffeSource struct {
bundle *x509bundle.Bundle
svid *x509svid.SVID
}
func (s *fakeSpiffeSource) GetX509BundleForTrustDomain(trustDomain spiffeid.TrustDomain) (*x509bundle.Bundle, error) {
return s.bundle, nil
}
func (s *fakeSpiffeSource) GetX509SVID() (*x509svid.SVID, error) {
return s.svid, nil
}