traefik/pkg/middlewares/auth/forward_test.go

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package auth
import (
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"context"
"fmt"
"io"
"net/http"
"net/http/httptest"
"testing"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/mocktracer"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/traefik/traefik/v2/pkg/config/dynamic"
tracingMiddleware "github.com/traefik/traefik/v2/pkg/middlewares/tracing"
"github.com/traefik/traefik/v2/pkg/testhelpers"
"github.com/traefik/traefik/v2/pkg/tracing"
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"github.com/vulcand/oxy/v2/forward"
)
func TestForwardAuthFail(t *testing.T) {
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next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "traefik")
})
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set(forward.ProxyAuthenticate, "test")
http.Error(w, "Forbidden", http.StatusForbidden)
}))
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t.Cleanup(server.Close)
middleware, err := NewForward(context.Background(), next, dynamic.ForwardAuth{
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Address: server.URL,
}, "authTest")
require.NoError(t, err)
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ts := httptest.NewServer(middleware)
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t.Cleanup(ts.Close)
req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
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res, err := http.DefaultClient.Do(req)
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require.NoError(t, err)
assert.Equal(t, http.StatusForbidden, res.StatusCode)
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body, err := io.ReadAll(res.Body)
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require.NoError(t, err)
err = res.Body.Close()
require.NoError(t, err)
assert.Equal(t, "test", res.Header.Get(forward.ProxyAuthenticate))
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assert.Equal(t, "Forbidden\n", string(body))
}
func TestForwardAuthSuccess(t *testing.T) {
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-Auth-User", "user@example.com")
w.Header().Set("X-Auth-Secret", "secret")
w.Header().Add("X-Auth-Group", "group1")
w.Header().Add("X-Auth-Group", "group2")
w.Header().Add("Foo-Bar", "auth-value")
fmt.Fprintln(w, "Success")
}))
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t.Cleanup(server.Close)
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next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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assert.Equal(t, "user@example.com", r.Header.Get("X-Auth-User"))
assert.Empty(t, r.Header.Get("X-Auth-Secret"))
assert.Equal(t, []string{"group1", "group2"}, r.Header["X-Auth-Group"])
assert.Equal(t, "auth-value", r.Header.Get("Foo-Bar"))
assert.Empty(t, r.Header.Get("Foo-Baz"))
fmt.Fprintln(w, "traefik")
})
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auth := dynamic.ForwardAuth{
Address: server.URL,
AuthResponseHeaders: []string{"X-Auth-User", "X-Auth-Group"},
AuthResponseHeadersRegex: "^Foo-",
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}
middleware, err := NewForward(context.Background(), next, auth, "authTest")
require.NoError(t, err)
ts := httptest.NewServer(middleware)
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t.Cleanup(ts.Close)
req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
req.Header.Set("X-Auth-Group", "admin_group")
req.Header.Set("Foo-Bar", "client-value")
req.Header.Set("Foo-Baz", "client-value")
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res, err := http.DefaultClient.Do(req)
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require.NoError(t, err)
assert.Equal(t, http.StatusOK, res.StatusCode)
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body, err := io.ReadAll(res.Body)
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require.NoError(t, err)
err = res.Body.Close()
require.NoError(t, err)
assert.Equal(t, "traefik\n", string(body))
}
func TestForwardAuthRedirect(t *testing.T) {
authTs := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
http.Redirect(w, r, "http://example.com/redirect-test", http.StatusFound)
}))
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t.Cleanup(authTs.Close)
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next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "traefik")
})
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auth := dynamic.ForwardAuth{Address: authTs.URL}
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authMiddleware, err := NewForward(context.Background(), next, auth, "authTest")
require.NoError(t, err)
ts := httptest.NewServer(authMiddleware)
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t.Cleanup(ts.Close)
client := &http.Client{
CheckRedirect: func(r *http.Request, via []*http.Request) error {
return http.ErrUseLastResponse
},
}
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req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
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res, err := client.Do(req)
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require.NoError(t, err)
assert.Equal(t, http.StatusFound, res.StatusCode)
location, err := res.Location()
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require.NoError(t, err)
assert.Equal(t, "http://example.com/redirect-test", location.String())
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body, err := io.ReadAll(res.Body)
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require.NoError(t, err)
err = res.Body.Close()
require.NoError(t, err)
assert.NotEmpty(t, string(body))
}
func TestForwardAuthRemoveHopByHopHeaders(t *testing.T) {
authTs := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
headers := w.Header()
for _, header := range hopHeaders {
if header == forward.TransferEncoding {
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headers.Set(header, "chunked")
} else {
headers.Add(header, "test")
}
}
http.Redirect(w, r, "http://example.com/redirect-test", http.StatusFound)
}))
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t.Cleanup(authTs.Close)
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next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "traefik")
})
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auth := dynamic.ForwardAuth{Address: authTs.URL}
authMiddleware, err := NewForward(context.Background(), next, auth, "authTest")
require.NoError(t, err)
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ts := httptest.NewServer(authMiddleware)
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t.Cleanup(ts.Close)
client := &http.Client{
CheckRedirect: func(r *http.Request, via []*http.Request) error {
return http.ErrUseLastResponse
},
}
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req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
res, err := client.Do(req)
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require.NoError(t, err)
assert.Equal(t, http.StatusFound, res.StatusCode, "they should be equal")
for _, header := range forward.HopHeaders {
assert.Equal(t, "", res.Header.Get(header), "hop-by-hop header '%s' mustn't be set", header)
}
location, err := res.Location()
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require.NoError(t, err)
assert.Equal(t, "http://example.com/redirect-test", location.String(), "they should be equal")
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body, err := io.ReadAll(res.Body)
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require.NoError(t, err)
assert.NotEmpty(t, string(body), "there should be something in the body")
}
func TestForwardAuthFailResponseHeaders(t *testing.T) {
authTs := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
cookie := &http.Cookie{Name: "example", Value: "testing", Path: "/"}
http.SetCookie(w, cookie)
w.Header().Add("X-Foo", "bar")
http.Error(w, "Forbidden", http.StatusForbidden)
}))
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t.Cleanup(authTs.Close)
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next := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintln(w, "traefik")
})
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auth := dynamic.ForwardAuth{
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Address: authTs.URL,
}
authMiddleware, err := NewForward(context.Background(), next, auth, "authTest")
require.NoError(t, err)
ts := httptest.NewServer(authMiddleware)
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t.Cleanup(ts.Close)
req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
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res, err := http.DefaultClient.Do(req)
require.NoError(t, err)
assert.Equal(t, http.StatusForbidden, res.StatusCode)
require.Len(t, res.Cookies(), 1)
for _, cookie := range res.Cookies() {
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assert.Equal(t, "testing", cookie.Value)
}
expectedHeaders := http.Header{
"Content-Length": []string{"10"},
"Content-Type": []string{"text/plain; charset=utf-8"},
"X-Foo": []string{"bar"},
"Set-Cookie": []string{"example=testing; Path=/"},
"X-Content-Type-Options": []string{"nosniff"},
}
assert.Len(t, res.Header, 6)
for key, value := range expectedHeaders {
assert.Equal(t, value, res.Header[key])
}
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body, err := io.ReadAll(res.Body)
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require.NoError(t, err)
err = res.Body.Close()
require.NoError(t, err)
assert.Equal(t, "Forbidden\n", string(body))
}
func Test_writeHeader(t *testing.T) {
testCases := []struct {
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name string
headers map[string]string
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authRequestHeaders []string
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trustForwardHeader bool
emptyHost bool
expectedHeaders map[string]string
checkForUnexpectedHeaders bool
}{
{
name: "trust Forward Header",
headers: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
},
trustForwardHeader: true,
expectedHeaders: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
},
},
{
name: "not trust Forward Header",
headers: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
},
trustForwardHeader: false,
expectedHeaders: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "foo.bar",
},
},
{
name: "trust Forward Header with empty Host",
headers: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
},
trustForwardHeader: true,
emptyHost: true,
expectedHeaders: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
},
},
{
name: "not trust Forward Header with empty Host",
headers: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
},
trustForwardHeader: false,
emptyHost: true,
expectedHeaders: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "",
},
},
{
name: "trust Forward Header with forwarded URI",
headers: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
"X-Forwarded-Uri": "/forward?q=1",
},
trustForwardHeader: true,
expectedHeaders: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
"X-Forwarded-Uri": "/forward?q=1",
},
},
{
name: "not trust Forward Header with forward requested URI",
headers: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "fii.bir",
"X-Forwarded-Uri": "/forward?q=1",
},
trustForwardHeader: false,
expectedHeaders: map[string]string{
"Accept": "application/json",
"X-Forwarded-Host": "foo.bar",
"X-Forwarded-Uri": "/path?q=1",
},
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},
{
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name: "trust Forward Header with forwarded request Method",
headers: map[string]string{
"X-Forwarded-Method": "OPTIONS",
},
trustForwardHeader: true,
expectedHeaders: map[string]string{
"X-Forwarded-Method": "OPTIONS",
},
},
{
name: "not trust Forward Header with forward request Method",
headers: map[string]string{
"X-Forwarded-Method": "OPTIONS",
},
trustForwardHeader: false,
expectedHeaders: map[string]string{
"X-Forwarded-Method": "GET",
},
},
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{
name: "remove hop-by-hop headers",
headers: map[string]string{
forward.Connection: "Connection",
forward.KeepAlive: "KeepAlive",
forward.ProxyAuthenticate: "ProxyAuthenticate",
forward.ProxyAuthorization: "ProxyAuthorization",
forward.Te: "Te",
forward.Trailers: "Trailers",
forward.TransferEncoding: "TransferEncoding",
forward.Upgrade: "Upgrade",
"X-CustomHeader": "CustomHeader",
},
trustForwardHeader: false,
expectedHeaders: map[string]string{
"X-CustomHeader": "CustomHeader",
"X-Forwarded-Proto": "http",
"X-Forwarded-Host": "foo.bar",
"X-Forwarded-Uri": "/path?q=1",
"X-Forwarded-Method": "GET",
forward.ProxyAuthenticate: "ProxyAuthenticate",
forward.ProxyAuthorization: "ProxyAuthorization",
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},
checkForUnexpectedHeaders: true,
},
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{
name: "filter forward request headers",
headers: map[string]string{
"X-CustomHeader": "CustomHeader",
"Content-Type": "multipart/form-data; boundary=---123456",
},
authRequestHeaders: []string{
"X-CustomHeader",
},
trustForwardHeader: false,
expectedHeaders: map[string]string{
"x-customHeader": "CustomHeader",
"X-Forwarded-Proto": "http",
"X-Forwarded-Host": "foo.bar",
"X-Forwarded-Uri": "/path?q=1",
"X-Forwarded-Method": "GET",
},
checkForUnexpectedHeaders: true,
},
{
name: "filter forward request headers doesn't add new headers",
headers: map[string]string{
"X-CustomHeader": "CustomHeader",
"Content-Type": "multipart/form-data; boundary=---123456",
},
authRequestHeaders: []string{
"X-CustomHeader",
"X-Non-Exists-Header",
},
trustForwardHeader: false,
expectedHeaders: map[string]string{
"X-CustomHeader": "CustomHeader",
"X-Forwarded-Proto": "http",
"X-Forwarded-Host": "foo.bar",
"X-Forwarded-Uri": "/path?q=1",
"X-Forwarded-Method": "GET",
},
checkForUnexpectedHeaders: true,
},
}
for _, test := range testCases {
t.Run(test.name, func(t *testing.T) {
req := testhelpers.MustNewRequest(http.MethodGet, "http://foo.bar/path?q=1", nil)
for key, value := range test.headers {
req.Header.Set(key, value)
}
if test.emptyHost {
req.Host = ""
}
forwardReq := testhelpers.MustNewRequest(http.MethodGet, "http://foo.bar/path?q=1", nil)
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writeHeader(req, forwardReq, test.trustForwardHeader, test.authRequestHeaders)
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actualHeaders := forwardReq.Header
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expectedHeaders := test.expectedHeaders
for key, value := range expectedHeaders {
assert.Equal(t, value, actualHeaders.Get(key))
actualHeaders.Del(key)
}
if test.checkForUnexpectedHeaders {
for key := range actualHeaders {
assert.Fail(t, "Unexpected header found", key)
}
}
})
}
}
func TestForwardAuthUsesTracing(t *testing.T) {
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Header.Get("Mockpfx-Ids-Traceid") == "" {
t.Errorf("expected Mockpfx-Ids-Traceid header to be present in request")
}
}))
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t.Cleanup(server.Close)
next := http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}))
auth := dynamic.ForwardAuth{
Address: server.URL,
}
tracer := mocktracer.New()
opentracing.SetGlobalTracer(tracer)
tr, _ := tracing.NewTracing("testApp", 100, &mockBackend{tracer})
next, err := NewForward(context.Background(), next, auth, "authTest")
require.NoError(t, err)
next = tracingMiddleware.NewEntryPoint(context.Background(), tr, "tracingTest", next)
ts := httptest.NewServer(next)
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t.Cleanup(ts.Close)
req := testhelpers.MustNewRequest(http.MethodGet, ts.URL, nil)
res, err := http.DefaultClient.Do(req)
require.NoError(t, err)
assert.Equal(t, http.StatusOK, res.StatusCode)
}
type mockBackend struct {
opentracing.Tracer
}
func (b *mockBackend) Setup(componentName string) (opentracing.Tracer, io.Closer, error) {
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return b.Tracer, io.NopCloser(nil), nil
}