kubesphere/pkg/apiserver/authentication/identityprovider/oidc/oidc_test.go

/*

 Copyright 2020 The KubeSphere Authors.

 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 oidc

import (
	"bytes"
	cryptorand "crypto/rand"
	"crypto/rsa"
	"encoding/base64"
	"encoding/binary"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"
	"time"

	"github.com/form3tech-oss/jwt-go"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	"github.com/onsi/gomega/gexec"
	"gopkg.in/square/go-jose.v2"

	"kubesphere.io/kubesphere/pkg/apiserver/authentication/identityprovider"
	"kubesphere.io/kubesphere/pkg/apiserver/authentication/oauth"
)

var (
	oidcServer *httptest.Server
)

func TestOIDC(t *testing.T) {
	RegisterFailHandler(Fail)
	RunSpecs(t, "OIDC Identity Provider Suite")
}

var _ = BeforeSuite(func(done Done) {
	privateKey, err := rsa.GenerateKey(cryptorand.Reader, 2048)
	Expect(err).Should(BeNil())
	jwk := jose.JSONWebKey{
		Key:       privateKey,
		KeyID:     "keyID",
		Algorithm: "RSA",
	}
	oidcServer = httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		var data interface{}
		switch r.RequestURI {
		case "/.well-known/openid-configuration":
			data = map[string]interface{}{
				"issuer":                 oidcServer.URL,
				"token_endpoint":         fmt.Sprintf("%s/token", oidcServer.URL),
				"authorization_endpoint": fmt.Sprintf("%s/authorize", oidcServer.URL),
				"userinfo_endpoint":      fmt.Sprintf("%s/userinfo", oidcServer.URL),
				"end_session_endpoint":   fmt.Sprintf("%s/endsession", oidcServer.URL),
				"jwks_uri":               fmt.Sprintf("%s/keys", oidcServer.URL),
				"response_types_supported": []string{
					"code",
					"token",
					"id_token",
					"none",
				},
				"id_token_signing_alg_values_supported": []string{
					"RS256",
				},
				"scopes_supported": []string{
					"openid",
					"email",
					"profile",
				},
				"token_endpoint_auth_methods_supported": []string{
					"client_secret_post",
					"client_secret_basic",
				},
				"claims_supported": []string{
					"aud",
					"email",
					"email_verified",
					"exp",
					"iat",
					"iss",
					"name",
					"sub",
				},
				"code_challenge_methods_supported": []string{
					"plain",
					"S256",
				},
				"grant_types_supported": []string{
					"authorization_code",
					"refresh_token",
				},
			}
		case "/user":
			data = map[string]interface{}{
				"login": "test",
				"email": "test@kubesphere.io",
			}
		case "/keys":
			data = map[string]interface{}{
				"keys": []map[string]interface{}{{
					"alg": jwk.Algorithm,
					"kty": jwk.Algorithm,
					"kid": jwk.KeyID,
					"n":   n(&privateKey.PublicKey),
					"e":   e(&privateKey.PublicKey),
				}},
			}
		case "/token":
			claims := jwt.MapClaims{
				"iss":            oidcServer.URL,
				"sub":            "110169484474386276334",
				"aud":            "kubesphere",
				"email":          "test@kubesphere.io",
				"email_verified": "true",
				"name":           "test",
				"iat":            time.Now().Unix(),
				"exp":            time.Now().Add(10 * time.Hour).Unix(),
			}
			idToken, _ := jwt.NewWithClaims(jwt.SigningMethodRS256, claims).SignedString(privateKey)
			data = map[string]interface{}{
				"access_token": "e72e16c7e42f292c6912e7710c838347ae178b4a",
				"id_token":     idToken,
				"token_type":   "Bearer",
				"expires_in":   3600,
			}
		default:
			fmt.Println(r.URL)
			w.WriteHeader(http.StatusInternalServerError)
			w.Write([]byte("not implemented"))
			return
		}

		w.Header().Add("Content-Type", "application/json")
		json.NewEncoder(w).Encode(data)
	}))
	close(done)
}, 60)

var _ = AfterSuite(func() {
	By("tearing down the test environment")
	gexec.KillAndWait(5 * time.Second)
	oidcServer.Close()
})

var _ = Describe("OIDC", func() {
	Context("OIDC", func() {
		var (
			provider identityprovider.OAuthProvider
			err      error
		)
		It("should configure successfully", func() {
			config := oauth.DynamicOptions{
				"issuer":             oidcServer.URL,
				"clientID":           "kubesphere",
				"clientSecret":       "c53e80ab92d48ab12f4e7f1f6976d1bdc996e0d7",
				"redirectURL":        "https://ks-console.kubesphere-system.svc/oauth/redirect/oidc",
				"insecureSkipVerify": true,
			}
			factory := oidcProviderFactory{}
			provider, err = factory.Create(config)
			Expect(err).Should(BeNil())
			expected := oauth.DynamicOptions{
				"issuer":             oidcServer.URL,
				"clientID":           "kubesphere",
				"clientSecret":       "c53e80ab92d48ab12f4e7f1f6976d1bdc996e0d7",
				"redirectURL":        "https://ks-console.kubesphere-system.svc/oauth/redirect/oidc",
				"insecureSkipVerify": true,
				"endpoint": oauth.DynamicOptions{
					"authURL":       fmt.Sprintf("%s/authorize", oidcServer.URL),
					"tokenURL":      fmt.Sprintf("%s/token", oidcServer.URL),
					"userInfoURL":   fmt.Sprintf("%s/userinfo", oidcServer.URL),
					"jwksURL":       fmt.Sprintf("%s/keys", oidcServer.URL),
					"endSessionURL": fmt.Sprintf("%s/endsession", oidcServer.URL),
				},
			}
			Expect(config).Should(Equal(expected))
		})
		It("should login successfully", func() {
			url, _ := url.Parse("https://ks-console.kubesphere-system.svc/oauth/redirect/oidc?code=00000")
			req := &http.Request{URL: url}
			identity, err := provider.IdentityExchangeCallback(req)
			Expect(err).Should(BeNil())
			Expect(identity.GetUserID()).Should(Equal(base64.RawURLEncoding.EncodeToString([]byte("110169484474386276334"))))
			Expect(identity.GetUsername()).Should(Equal("test"))
			Expect(identity.GetEmail()).Should(Equal("test@kubesphere.io"))
		})
	})
})

func n(pub *rsa.PublicKey) string {
	return encode(pub.N.Bytes())
}

func e(pub *rsa.PublicKey) string {
	data := make([]byte, 8)
	binary.BigEndian.PutUint64(data, uint64(pub.E))
	return encode(bytes.TrimLeft(data, "\x00"))
}

func encode(payload []byte) string {
	result := base64.URLEncoding.EncodeToString(payload)
	return strings.TrimRight(result, "=")
}