server_test.go

/*
Copyright 2015 All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"bufio"
	"io/ioutil"
	"net"
	"net/http"
	"testing"

	log "github.com/Sirupsen/logrus"
	"github.com/gin-gonic/gin"
	"net/url"
)

const (
	fakeClientID = "test"
	fakeSecret   = fakeClientID

	fakeAdminRoleURL       = "/admin"
	fakeTestRoleURL        = "/test_role"
	fakeTestAdminRolesURL  = "/test_admin_roles"
	fakeAuthAllURL         = "/auth_all"
	fakeTestWhitelistedURL = fakeAuthAllURL + "/white_listed"
	faketestListenOrdered  = fakeAuthAllURL + "/bad_order"

	fakeAdminRole = "role:admin"
	fakeTestRole  = "role:test"
)

func newFakeKeycloakProxy(t *testing.T) *KeycloakProxy {
	log.SetOutput(ioutil.Discard)
	return &KeycloakProxy{
		config: &Config{
			DiscoveryURL:          "127.0.0.1:",
			ClientID:              fakeClientID,
			Secret:                fakeSecret,
			EncryptionKey:         "AgXa7xRcoClDEU0ZDSH4X0XhL5Qy2Z2j",
			SkipTokenVerification: true,
			Scopes:                []string{},
			RefreshSession:        false,
			ClaimsMatch: map[string]string{
				"aud": fakeClientID,
			},
			Resources: []*Resource{
				{
					URL:          fakeAdminRoleURL,
					Methods:      []string{"GET"},
					RolesAllowed: []string{fakeAdminRole},
				},
				{
					URL:          fakeTestRoleURL,
					Methods:      []string{"GET"},
					RolesAllowed: []string{fakeTestRole},
				},
				{
					URL:          fakeTestAdminRolesURL,
					Methods:      []string{"GET"},
					RolesAllowed: []string{fakeAdminRole, fakeTestRole},
				},
				{
					URL:          fakeTestWhitelistedURL,
					WhiteListed:  true,
					Methods:      []string{},
					RolesAllowed: []string{},
				},
				{
					URL:          fakeAuthAllURL,
					Methods:      []string{"ANY"},
					RolesAllowed: []string{},
				},
				{
					URL:          fakeTestWhitelistedURL,
					WhiteListed:  true,
					Methods:      []string{},
					RolesAllowed: []string{},
				},
			},
		},
	}
}

func TestRedirectToAuthorization(t *testing.T) {
	context := newFakeGinContext("GET", "/admin")
	proxy := newFakeKeycloakProxy(t)

	proxy.config.SkipTokenVerification = false
	proxy.redirectToAuthorization(context)
	if context.Writer.Status() != http.StatusTemporaryRedirect {
		t.Errorf("we should have been given a temporary redirect")
	}

	proxy.config.SkipTokenVerification = true
	proxy.redirectToAuthorization(context)
	if context.Writer.Status() != http.StatusForbidden {
		t.Errorf("we should have been given a forbidden code")
	}
}

func TestRedirectURL(t *testing.T) {
	context := newFakeGinContext("GET", "/admin")
	proxy := newFakeKeycloakProxy(t)

	if proxy.redirectToURL("http://127.0.0.1", context); context.Writer.Status() != http.StatusTemporaryRedirect {
		t.Errorf("we should have recieved a redirect")
	}

	if !context.IsAborted() {
		t.Errorf("the context should have been aborted")
	}
}

func TestAccessForbidden(t *testing.T) {
	context := newFakeGinContext("GET", "/admin")
	proxy := newFakeKeycloakProxy(t)

	proxy.config.SkipTokenVerification = false
	if proxy.accessForbidden(context); context.Writer.Status() != http.StatusForbidden {
		t.Errorf("we should have recieved a forbidden access")
	}

	proxy.config.SkipTokenVerification = true
	if proxy.accessForbidden(context); context.Writer.Status() != http.StatusForbidden {
		t.Errorf("we should have recieved a forbidden access")
	}
}

func newFakeResponse() *fakeResponse {
	return &fakeResponse{
		status:  http.StatusOK,
		headers: make(http.Header, 0),
	}
}

func newFakeGinContext(method, uri string) *gin.Context {
	return &gin.Context{
		Request: &http.Request{
			Method:     method,
			RequestURI: uri,
			URL: &url.URL{
				Scheme: "http",
				Host:   "127.0.0.1",
				Path:   "uri",
			},
		},
		Writer: newFakeResponse(),
	}
}

type fakeResponse struct {
	size    int
	status  int
	headers http.Header
}

func (r *fakeResponse) Flush()                                       {}
func (r *fakeResponse) Written() bool                                { return false }
func (r *fakeResponse) WriteHeaderNow()                              {}
func (r *fakeResponse) Size() int                                    { return r.size }
func (r *fakeResponse) Status() int                                  { return r.status }
func (r *fakeResponse) Header() http.Header                          { return r.headers }
func (r *fakeResponse) WriteHeader(code int)                         { r.status = code }
func (r *fakeResponse) Write(content []byte) (int, error)            { return len(content), nil }
func (r *fakeResponse) WriteString(s string) (int, error)            { return len(s), nil }
func (r *fakeResponse) Hijack() (net.Conn, *bufio.ReadWriter, error) { return nil, nil, nil }
func (r *fakeResponse) CloseNotify() <-chan bool                     { return make(chan bool, 0) }