Add vendor folder to git

vendor/k8s.io/client-go/plugin/pkg/client/auth/oidc/BUILD

@@ -0,0 +1,35 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["oidc_test.go"],
+    library = ":go_default_library",
+    tags = ["automanaged"],
+    deps = [
+        "//vendor/github.com/coreos/go-oidc/jose:go_default_library",
+        "//vendor/github.com/coreos/go-oidc/key:go_default_library",
+        "//vendor/github.com/coreos/go-oidc/oauth2:go_default_library",
+        "//vendor/k8s.io/client-go/plugin/pkg/auth/authenticator/token/oidc/testing:go_default_library",
+    ],
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = ["oidc.go"],
+    tags = ["automanaged"],
+    deps = [
+        "//vendor/github.com/coreos/go-oidc/jose:go_default_library",
+        "//vendor/github.com/coreos/go-oidc/oauth2:go_default_library",
+        "//vendor/github.com/coreos/go-oidc/oidc:go_default_library",
+        "//vendor/github.com/golang/glog:go_default_library",
+        "//vendor/k8s.io/client-go/rest:go_default_library",
+    ],
+)

vendor/k8s.io/client-go/plugin/pkg/client/auth/oidc/OWNERS

@@ -0,0 +1,4 @@
+approvers:
+- ericchiang
+reviewers:
+- ericchiang

vendor/k8s.io/client-go/plugin/pkg/client/auth/oidc/oidc.go

@@ -0,0 +1,336 @@
+/*
+Copyright 2016 The Kubernetes 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 (
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/coreos/go-oidc/jose"
+	"github.com/coreos/go-oidc/oauth2"
+	"github.com/coreos/go-oidc/oidc"
+	"github.com/golang/glog"
+
+	restclient "k8s.io/client-go/rest"
+)
+
+const (
+	cfgIssuerUrl                = "idp-issuer-url"
+	cfgClientID                 = "client-id"
+	cfgClientSecret             = "client-secret"
+	cfgCertificateAuthority     = "idp-certificate-authority"
+	cfgCertificateAuthorityData = "idp-certificate-authority-data"
+	cfgExtraScopes              = "extra-scopes"
+	cfgIDToken                  = "id-token"
+	cfgRefreshToken             = "refresh-token"
+)
+
+func init() {
+	if err := restclient.RegisterAuthProviderPlugin("oidc", newOIDCAuthProvider); err != nil {
+		glog.Fatalf("Failed to register oidc auth plugin: %v", err)
+	}
+}
+
+// expiryDelta determines how earlier a token should be considered
+// expired than its actual expiration time. It is used to avoid late
+// expirations due to client-server time mismatches.
+//
+// NOTE(ericchiang): this is take from golang.org/x/oauth2
+const expiryDelta = 10 * time.Second
+
+var cache = newClientCache()
+
+// Like TLS transports, keep a cache of OIDC clients indexed by issuer URL.
+type clientCache struct {
+	mu    sync.RWMutex
+	cache map[cacheKey]*oidcAuthProvider
+}
+
+func newClientCache() *clientCache {
+	return &clientCache{cache: make(map[cacheKey]*oidcAuthProvider)}
+}
+
+type cacheKey struct {
+	// Canonical issuer URL string of the provider.
+	issuerURL string
+
+	clientID     string
+	clientSecret string
+
+	// Don't use CA as cache key because we only add a cache entry if we can connect
+	// to the issuer in the first place. A valid CA is a prerequisite.
+}
+
+func (c *clientCache) getClient(issuer, clientID, clientSecret string) (*oidcAuthProvider, bool) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	client, ok := c.cache[cacheKey{issuer, clientID, clientSecret}]
+	return client, ok
+}
+
+// setClient attempts to put the client in the cache but may return any clients
+// with the same keys set before. This is so there's only ever one client for a provider.
+func (c *clientCache) setClient(issuer, clientID, clientSecret string, client *oidcAuthProvider) *oidcAuthProvider {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	key := cacheKey{issuer, clientID, clientSecret}
+
+	// If another client has already initialized a client for the given provider we want
+	// to use that client instead of the one we're trying to set. This is so all transports
+	// share a client and can coordinate around the same mutex when refreshing and writing
+	// to the kubeconfig.
+	if oldClient, ok := c.cache[key]; ok {
+		return oldClient
+	}
+
+	c.cache[key] = client
+	return client
+}
+
+func newOIDCAuthProvider(_ string, cfg map[string]string, persister restclient.AuthProviderConfigPersister) (restclient.AuthProvider, error) {
+	issuer := cfg[cfgIssuerUrl]
+	if issuer == "" {
+		return nil, fmt.Errorf("Must provide %s", cfgIssuerUrl)
+	}
+
+	clientID := cfg[cfgClientID]
+	if clientID == "" {
+		return nil, fmt.Errorf("Must provide %s", cfgClientID)
+	}
+
+	clientSecret := cfg[cfgClientSecret]
+	if clientSecret == "" {
+		return nil, fmt.Errorf("Must provide %s", cfgClientSecret)
+	}
+
+	// Check cache for existing provider.
+	if provider, ok := cache.getClient(issuer, clientID, clientSecret); ok {
+		return provider, nil
+	}
+
+	var certAuthData []byte
+	var err error
+	if cfg[cfgCertificateAuthorityData] != "" {
+		certAuthData, err = base64.StdEncoding.DecodeString(cfg[cfgCertificateAuthorityData])
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	clientConfig := restclient.Config{
+		TLSClientConfig: restclient.TLSClientConfig{
+			CAFile: cfg[cfgCertificateAuthority],
+			CAData: certAuthData,
+		},
+	}
+
+	trans, err := restclient.TransportFor(&clientConfig)
+	if err != nil {
+		return nil, err
+	}
+	hc := &http.Client{Transport: trans}
+
+	providerCfg, err := oidc.FetchProviderConfig(hc, issuer)
+	if err != nil {
+		return nil, fmt.Errorf("error fetching provider config: %v", err)
+	}
+
+	scopes := strings.Split(cfg[cfgExtraScopes], ",")
+	oidcCfg := oidc.ClientConfig{
+		HTTPClient: hc,
+		Credentials: oidc.ClientCredentials{
+			ID:     clientID,
+			Secret: clientSecret,
+		},
+		ProviderConfig: providerCfg,
+		Scope:          append(scopes, oidc.DefaultScope...),
+	}
+	client, err := oidc.NewClient(oidcCfg)
+	if err != nil {
+		return nil, fmt.Errorf("error creating OIDC Client: %v", err)
+	}
+
+	provider := &oidcAuthProvider{
+		client:    &oidcClient{client},
+		cfg:       cfg,
+		persister: persister,
+		now:       time.Now,
+	}
+
+	return cache.setClient(issuer, clientID, clientSecret, provider), nil
+}
+
+type oidcAuthProvider struct {
+	// Interface rather than a raw *oidc.Client for testing.
+	client OIDCClient
+
+	// Stubbed out for testing.
+	now func() time.Time
+
+	// Mutex guards persisting to the kubeconfig file and allows synchronized
+	// updates to the in-memory config. It also ensures concurrent calls to
+	// the RoundTripper only trigger a single refresh request.
+	mu        sync.Mutex
+	cfg       map[string]string
+	persister restclient.AuthProviderConfigPersister
+}
+
+func (p *oidcAuthProvider) WrapTransport(rt http.RoundTripper) http.RoundTripper {
+	return &roundTripper{
+		wrapped:  rt,
+		provider: p,
+	}
+}
+
+func (p *oidcAuthProvider) Login() error {
+	return errors.New("not yet implemented")
+}
+
+type OIDCClient interface {
+	refreshToken(rt string) (oauth2.TokenResponse, error)
+	verifyJWT(jwt *jose.JWT) error
+}
+
+type roundTripper struct {
+	provider *oidcAuthProvider
+	wrapped  http.RoundTripper
+}
+
+func (r *roundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if len(req.Header.Get("Authorization")) != 0 {
+		return r.wrapped.RoundTrip(req)
+	}
+	token, err := r.provider.idToken()
+	if err != nil {
+		return nil, err
+	}
+
+	// shallow copy of the struct
+	r2 := new(http.Request)
+	*r2 = *req
+	// deep copy of the Header so we don't modify the original
+	// request's Header (as per RoundTripper contract).
+	r2.Header = make(http.Header)
+	for k, s := range req.Header {
+		r2.Header[k] = s
+	}
+	r2.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
+
+	return r.wrapped.RoundTrip(r2)
+}
+
+func (p *oidcAuthProvider) idToken() (string, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if idToken, ok := p.cfg[cfgIDToken]; ok && len(idToken) > 0 {
+		valid, err := verifyJWTExpiry(p.now(), idToken)
+		if err != nil {
+			return "", err
+		}
+		if valid {
+			// If the cached id token is still valid use it.
+			return idToken, nil
+		}
+	}
+
+	// Try to request a new token using the refresh token.
+	rt, ok := p.cfg[cfgRefreshToken]
+	if !ok || len(rt) == 0 {
+		return "", errors.New("No valid id-token, and cannot refresh without refresh-token")
+	}
+
+	tokens, err := p.client.refreshToken(rt)
+	if err != nil {
+		return "", fmt.Errorf("could not refresh token: %v", err)
+	}
+	jwt, err := jose.ParseJWT(tokens.IDToken)
+	if err != nil {
+		return "", err
+	}
+
+	if err := p.client.verifyJWT(&jwt); err != nil {
+		return "", err
+	}
+
+	// Create a new config to persist.
+	newCfg := make(map[string]string)
+	for key, val := range p.cfg {
+		newCfg[key] = val
+	}
+
+	if tokens.RefreshToken != "" && tokens.RefreshToken != rt {
+		newCfg[cfgRefreshToken] = tokens.RefreshToken
+	}
+
+	newCfg[cfgIDToken] = tokens.IDToken
+	if err = p.persister.Persist(newCfg); err != nil {
+		return "", fmt.Errorf("could not perist new tokens: %v", err)
+	}
+
+	// Update the in memory config to reflect the on disk one.
+	p.cfg = newCfg
+
+	return tokens.IDToken, nil
+}
+
+// oidcClient is the real implementation of the OIDCClient interface, which is
+// used for testing.
+type oidcClient struct {
+	client *oidc.Client
+}
+
+func (o *oidcClient) refreshToken(rt string) (oauth2.TokenResponse, error) {
+	oac, err := o.client.OAuthClient()
+	if err != nil {
+		return oauth2.TokenResponse{}, err
+	}
+
+	return oac.RequestToken(oauth2.GrantTypeRefreshToken, rt)
+}
+
+func (o *oidcClient) verifyJWT(jwt *jose.JWT) error {
+	return o.client.VerifyJWT(*jwt)
+}
+
+func verifyJWTExpiry(now time.Time, s string) (valid bool, err error) {
+	jwt, err := jose.ParseJWT(s)
+	if err != nil {
+		return false, fmt.Errorf("invalid %q", cfgIDToken)
+	}
+	claims, err := jwt.Claims()
+	if err != nil {
+		return false, err
+	}
+
+	exp, ok, err := claims.TimeClaim("exp")
+	switch {
+	case err != nil:
+		return false, fmt.Errorf("failed to parse 'exp' claim: %v", err)
+	case !ok:
+		return false, errors.New("missing required 'exp' claim")
+	case exp.After(now.Add(expiryDelta)):
+		return true, nil
+	}
+
+	return false, nil
+}

vendor/k8s.io/client-go/plugin/pkg/client/auth/oidc/oidc_test.go

@@ -0,0 +1,384 @@
+/*
+Copyright 2016 The Kubernetes 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 (
+	"encoding/base64"
+	"errors"
+	"io/ioutil"
+	"os"
+	"path"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/coreos/go-oidc/jose"
+	"github.com/coreos/go-oidc/key"
+	"github.com/coreos/go-oidc/oauth2"
+
+	oidctesting "k8s.io/client-go/plugin/pkg/auth/authenticator/token/oidc/testing"
+)
+
+func clearCache() {
+	cache = newClientCache()
+}
+
+type persister struct{}
+
+// we don't need to actually persist anything because there's no way for us to
+// read from a persister.
+func (p *persister) Persist(map[string]string) error { return nil }
+
+type noRefreshOIDCClient struct{}
+
+func (c *noRefreshOIDCClient) refreshToken(rt string) (oauth2.TokenResponse, error) {
+	return oauth2.TokenResponse{}, errors.New("alwaysErrOIDCClient: cannot refresh token")
+}
+
+func (c *noRefreshOIDCClient) verifyJWT(jwt *jose.JWT) error {
+	return nil
+}
+
+type mockOIDCClient struct {
+	tokenResponse oauth2.TokenResponse
+}
+
+func (c *mockOIDCClient) refreshToken(rt string) (oauth2.TokenResponse, error) {
+	return c.tokenResponse, nil
+}
+
+func (c *mockOIDCClient) verifyJWT(jwt *jose.JWT) error {
+	return nil
+}
+
+func TestNewOIDCAuthProvider(t *testing.T) {
+	tempDir, err := ioutil.TempDir(os.TempDir(), "oidc_test")
+	if err != nil {
+		t.Fatalf("Cannot make temp dir %v", err)
+	}
+	cert := path.Join(tempDir, "oidc-cert")
+	key := path.Join(tempDir, "oidc-key")
+	defer os.RemoveAll(tempDir)
+
+	oidctesting.GenerateSelfSignedCert(t, "127.0.0.1", cert, key)
+	op := oidctesting.NewOIDCProvider(t, "")
+	srv, err := op.ServeTLSWithKeyPair(cert, key)
+	if err != nil {
+		t.Fatalf("Cannot start server %v", err)
+	}
+	defer srv.Close()
+
+	certData, err := ioutil.ReadFile(cert)
+	if err != nil {
+		t.Fatalf("Could not read cert bytes %v", err)
+	}
+
+	makeToken := func(exp time.Time) *jose.JWT {
+		jwt, err := jose.NewSignedJWT(jose.Claims(map[string]interface{}{
+			"exp": exp.UTC().Unix(),
+		}), op.PrivKey.Signer())
+		if err != nil {
+			t.Fatalf("Could not create signed JWT %v", err)
+		}
+		return jwt
+	}
+
+	t0 := time.Now()
+
+	goodToken := makeToken(t0.Add(time.Hour)).Encode()
+	expiredToken := makeToken(t0.Add(-time.Hour)).Encode()
+
+	tests := []struct {
+		name string
+
+		cfg         map[string]string
+		wantInitErr bool
+
+		client       OIDCClient
+		wantCfg      map[string]string
+		wantTokenErr bool
+	}{
+		{
+			// A Valid configuration
+			name: "no id token and no refresh token",
+			cfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "client-secret",
+			},
+			wantTokenErr: true,
+		},
+		{
+			name: "valid config with an initial token",
+			cfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "client-secret",
+				cfgIDToken:              goodToken,
+			},
+			client: new(noRefreshOIDCClient),
+			wantCfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "client-secret",
+				cfgIDToken:              goodToken,
+			},
+		},
+		{
+			name: "invalid ID token with a refresh token",
+			cfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "client-secret",
+				cfgRefreshToken:         "foo",
+				cfgIDToken:              expiredToken,
+			},
+			client: &mockOIDCClient{
+				tokenResponse: oauth2.TokenResponse{
+					IDToken: goodToken,
+				},
+			},
+			wantCfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "client-secret",
+				cfgRefreshToken:         "foo",
+				cfgIDToken:              goodToken,
+			},
+		},
+		{
+			name: "invalid ID token with a refresh token, server returns new refresh token",
+			cfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "client-secret",
+				cfgRefreshToken:         "foo",
+				cfgIDToken:              expiredToken,
+			},
+			client: &mockOIDCClient{
+				tokenResponse: oauth2.TokenResponse{
+					IDToken:      goodToken,
+					RefreshToken: "bar",
+				},
+			},
+			wantCfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "client-secret",
+				cfgRefreshToken:         "bar",
+				cfgIDToken:              goodToken,
+			},
+		},
+		{
+			name: "expired token and no refresh otken",
+			cfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "client-secret",
+				cfgIDToken:              expiredToken,
+			},
+			wantTokenErr: true,
+		},
+		{
+			name: "valid base64d ca",
+			cfg: map[string]string{
+				cfgIssuerUrl:                srv.URL,
+				cfgCertificateAuthorityData: base64.StdEncoding.EncodeToString(certData),
+				cfgClientID:                 "client-id",
+				cfgClientSecret:             "client-secret",
+			},
+			client:       new(noRefreshOIDCClient),
+			wantTokenErr: true,
+		},
+		{
+			name: "missing client ID",
+			cfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientSecret:         "client-secret",
+			},
+			wantInitErr: true,
+		},
+		{
+			name: "missing client secret",
+			cfg: map[string]string{
+				cfgIssuerUrl:            srv.URL,
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+			},
+			wantInitErr: true,
+		},
+		{
+			name: "missing issuer URL",
+			cfg: map[string]string{
+				cfgCertificateAuthority: cert,
+				cfgClientID:             "client-id",
+				cfgClientSecret:         "secret",
+			},
+			wantInitErr: true,
+		},
+		{
+			name: "missing TLS config",
+			cfg: map[string]string{
+				cfgIssuerUrl:    srv.URL,
+				cfgClientID:     "client-id",
+				cfgClientSecret: "secret",
+			},
+			wantInitErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		clearCache()
+
+		p, err := newOIDCAuthProvider("cluster.example.com", tt.cfg, new(persister))
+		if tt.wantInitErr {
+			if err == nil {
+				t.Errorf("%s: want non-nil err", tt.name)
+			}
+			continue
+		}
+
+		if err != nil {
+			t.Errorf("%s: unexpected error on newOIDCAuthProvider: %v", tt.name, err)
+			continue
+		}
+
+		provider := p.(*oidcAuthProvider)
+		provider.client = tt.client
+		provider.now = func() time.Time { return t0 }
+
+		if _, err := provider.idToken(); err != nil {
+			if !tt.wantTokenErr {
+				t.Errorf("%s: failed to get id token: %v", tt.name, err)
+			}
+			continue
+		}
+		if tt.wantTokenErr {
+			t.Errorf("%s: expected to not get id token: %v", tt.name, err)
+			continue
+		}
+
+		if !reflect.DeepEqual(tt.wantCfg, provider.cfg) {
+			t.Errorf("%s: expected config %#v got %#v", tt.name, tt.wantCfg, provider.cfg)
+		}
+	}
+}
+
+func TestVerifyJWTExpiry(t *testing.T) {
+	privKey, err := key.GeneratePrivateKey()
+	if err != nil {
+		t.Fatalf("can't generate private key: %v", err)
+	}
+	makeToken := func(s string, exp time.Time, count int) *jose.JWT {
+		jwt, err := jose.NewSignedJWT(jose.Claims(map[string]interface{}{
+			"test":  s,
+			"exp":   exp.UTC().Unix(),
+			"count": count,
+		}), privKey.Signer())
+		if err != nil {
+			t.Fatalf("Could not create signed JWT %v", err)
+		}
+		return jwt
+	}
+
+	t0 := time.Now()
+
+	tests := []struct {
+		name        string
+		jwt         *jose.JWT
+		now         time.Time
+		wantErr     bool
+		wantExpired bool
+	}{
+		{
+			name: "valid jwt",
+			jwt:  makeToken("foo", t0.Add(time.Hour), 1),
+			now:  t0,
+		},
+		{
+			name:    "invalid jwt",
+			jwt:     &jose.JWT{},
+			now:     t0,
+			wantErr: true,
+		},
+		{
+			name:        "expired jwt",
+			jwt:         makeToken("foo", t0.Add(-time.Hour), 1),
+			now:         t0,
+			wantExpired: true,
+		},
+		{
+			name:        "jwt expires soon enough to be marked expired",
+			jwt:         makeToken("foo", t0, 1),
+			now:         t0,
+			wantExpired: true,
+		},
+	}
+
+	for _, tc := range tests {
+		func() {
+			valid, err := verifyJWTExpiry(tc.now, tc.jwt.Encode())
+			if err != nil {
+				if !tc.wantErr {
+					t.Errorf("%s: %v", tc.name, err)
+				}
+				return
+			}
+			if tc.wantErr {
+				t.Errorf("%s: expected error", tc.name)
+				return
+			}
+
+			if valid && tc.wantExpired {
+				t.Errorf("%s: expected token to be expired", tc.name)
+			}
+			if !valid && !tc.wantExpired {
+				t.Errorf("%s: expected token to be valid", tc.name)
+			}
+		}()
+	}
+}
+
+func TestClientCache(t *testing.T) {
+	cache := newClientCache()
+
+	if _, ok := cache.getClient("issuer1", "id1", "secret1"); ok {
+		t.Fatalf("got client before putting one in the cache")
+	}
+
+	cli1 := new(oidcAuthProvider)
+	cli2 := new(oidcAuthProvider)
+
+	gotcli := cache.setClient("issuer1", "id1", "secret1", cli1)
+	if cli1 != gotcli {
+		t.Fatalf("set first client and got a different one")
+	}
+
+	gotcli = cache.setClient("issuer1", "id1", "secret1", cli2)
+	if cli1 != gotcli {
+		t.Fatalf("set a second client and didn't get the first")
+	}
+}