build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/client-go/transport/OWNERS

@@ -0,0 +1,8 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+reviewers:
+  - smarterclayton
+  - wojtek-t
+  - deads2k
+  - liggitt
+  - caesarxuchao

e2e/vendor/k8s.io/client-go/transport/cache.go

@@ -0,0 +1,178 @@
+/*
+Copyright 2015 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 transport
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	utilnet "k8s.io/apimachinery/pkg/util/net"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/client-go/tools/metrics"
+)
+
+// TlsTransportCache caches TLS http.RoundTrippers different configurations. The
+// same RoundTripper will be returned for configs with identical TLS options If
+// the config has no custom TLS options, http.DefaultTransport is returned.
+type tlsTransportCache struct {
+	mu         sync.Mutex
+	transports map[tlsCacheKey]*http.Transport
+}
+
+// DialerStopCh is stop channel that is passed down to dynamic cert dialer.
+// It's exposed as variable for testing purposes to avoid testing for goroutine
+// leakages.
+var DialerStopCh = wait.NeverStop
+
+const idleConnsPerHost = 25
+
+var tlsCache = &tlsTransportCache{transports: make(map[tlsCacheKey]*http.Transport)}
+
+type tlsCacheKey struct {
+	insecure           bool
+	caData             string
+	certData           string
+	keyData            string `datapolicy:"security-key"`
+	certFile           string
+	keyFile            string
+	serverName         string
+	nextProtos         string
+	disableCompression bool
+	// these functions are wrapped to allow them to be used as map keys
+	getCert *GetCertHolder
+	dial    *DialHolder
+}
+
+func (t tlsCacheKey) String() string {
+	keyText := "<none>"
+	if len(t.keyData) > 0 {
+		keyText = "<redacted>"
+	}
+	return fmt.Sprintf("insecure:%v, caData:%#v, certData:%#v, keyData:%s, serverName:%s, disableCompression:%t, getCert:%p, dial:%p",
+		t.insecure, t.caData, t.certData, keyText, t.serverName, t.disableCompression, t.getCert, t.dial)
+}
+
+func (c *tlsTransportCache) get(config *Config) (http.RoundTripper, error) {
+	key, canCache, err := tlsConfigKey(config)
+	if err != nil {
+		return nil, err
+	}
+
+	if canCache {
+		// Ensure we only create a single transport for the given TLS options
+		c.mu.Lock()
+		defer c.mu.Unlock()
+		defer metrics.TransportCacheEntries.Observe(len(c.transports))
+
+		// See if we already have a custom transport for this config
+		if t, ok := c.transports[key]; ok {
+			metrics.TransportCreateCalls.Increment("hit")
+			return t, nil
+		}
+		metrics.TransportCreateCalls.Increment("miss")
+	} else {
+		metrics.TransportCreateCalls.Increment("uncacheable")
+	}
+
+	// Get the TLS options for this client config
+	tlsConfig, err := TLSConfigFor(config)
+	if err != nil {
+		return nil, err
+	}
+	// The options didn't require a custom TLS config
+	if tlsConfig == nil && config.DialHolder == nil && config.Proxy == nil {
+		return http.DefaultTransport, nil
+	}
+
+	var dial func(ctx context.Context, network, address string) (net.Conn, error)
+	if config.DialHolder != nil {
+		dial = config.DialHolder.Dial
+	} else {
+		dial = (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}).DialContext
+	}
+
+	// If we use are reloading files, we need to handle certificate rotation properly
+	// TODO(jackkleeman): We can also add rotation here when config.HasCertCallback() is true
+	if config.TLS.ReloadTLSFiles && tlsConfig != nil && tlsConfig.GetClientCertificate != nil {
+		dynamicCertDialer := certRotatingDialer(tlsConfig.GetClientCertificate, dial)
+		tlsConfig.GetClientCertificate = dynamicCertDialer.GetClientCertificate
+		dial = dynamicCertDialer.connDialer.DialContext
+		go dynamicCertDialer.Run(DialerStopCh)
+	}
+
+	proxy := http.ProxyFromEnvironment
+	if config.Proxy != nil {
+		proxy = config.Proxy
+	}
+
+	transport := utilnet.SetTransportDefaults(&http.Transport{
+		Proxy:               proxy,
+		TLSHandshakeTimeout: 10 * time.Second,
+		TLSClientConfig:     tlsConfig,
+		MaxIdleConnsPerHost: idleConnsPerHost,
+		DialContext:         dial,
+		DisableCompression:  config.DisableCompression,
+	})
+
+	if canCache {
+		// Cache a single transport for these options
+		c.transports[key] = transport
+	}
+
+	return transport, nil
+}
+
+// tlsConfigKey returns a unique key for tls.Config objects returned from TLSConfigFor
+func tlsConfigKey(c *Config) (tlsCacheKey, bool, error) {
+	// Make sure ca/key/cert content is loaded
+	if err := loadTLSFiles(c); err != nil {
+		return tlsCacheKey{}, false, err
+	}
+
+	if c.Proxy != nil {
+		// cannot determine equality for functions
+		return tlsCacheKey{}, false, nil
+	}
+
+	k := tlsCacheKey{
+		insecure:           c.TLS.Insecure,
+		caData:             string(c.TLS.CAData),
+		serverName:         c.TLS.ServerName,
+		nextProtos:         strings.Join(c.TLS.NextProtos, ","),
+		disableCompression: c.DisableCompression,
+		getCert:            c.TLS.GetCertHolder,
+		dial:               c.DialHolder,
+	}
+
+	if c.TLS.ReloadTLSFiles {
+		k.certFile = c.TLS.CertFile
+		k.keyFile = c.TLS.KeyFile
+	} else {
+		k.certData = string(c.TLS.CertData)
+		k.keyData = string(c.TLS.KeyData)
+	}
+
+	return k, true, nil
+}

e2e/vendor/k8s.io/client-go/transport/cache_go118.go

@@ -0,0 +1,46 @@
+//go:build go1.18
+
+/*
+Copyright 2022 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 transport
+
+// this is just to make the "unused" linter rule happy
+var _ = isCacheKeyComparable[tlsCacheKey]
+
+// assert at compile time that tlsCacheKey is comparable in a way that will never panic at runtime.
+//
+// Golang 1.20 introduced an exception to type constraints that allows comparable, but not
+// necessarily strictly comparable type arguments to satisfy the `comparable` type constraint,
+// thus allowing interfaces to fulfil the `comparable` constraint.
+// However, by definition, "A comparison of two interface values with identical
+// dynamic types causes a run-time panic if that type is not comparable".
+//
+// We want to make sure that comparing two `tlsCacheKey` elements won't cause a
+// runtime panic. In order to do that, we'll force the `tlsCacheKey` to be strictly
+// comparable, thus making it impossible for it to contain interfaces.
+// To assert strict comparability, we'll use another definition: "Type
+// parameters are comparable if they are strictly comparable".
+// Below, we first construct a type parameter from the `tlsCacheKey` type so that
+// we can then push this type parameter to a comparable check, thus checking these
+// are strictly comparable.
+//
+// Original suggestion from https://github.com/golang/go/issues/56548#issuecomment-1317673963
+func isCacheKeyComparable[K tlsCacheKey]() {
+	_ = isComparable[K]
+}
+
+func isComparable[T comparable]() {}

e2e/vendor/k8s.io/client-go/transport/cert_rotation.go

@@ -0,0 +1,179 @@
+/*
+Copyright 2020 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 transport
+
+import (
+	"bytes"
+	"crypto/tls"
+	"fmt"
+	"reflect"
+	"sync"
+	"time"
+
+	utilnet "k8s.io/apimachinery/pkg/util/net"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/client-go/util/connrotation"
+	"k8s.io/client-go/util/workqueue"
+	"k8s.io/klog/v2"
+)
+
+const workItemKey = "key"
+
+// CertCallbackRefreshDuration is exposed so that integration tests can crank up the reload speed.
+var CertCallbackRefreshDuration = 5 * time.Minute
+
+type reloadFunc func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
+
+type dynamicClientCert struct {
+	clientCert *tls.Certificate
+	certMtx    sync.RWMutex
+
+	reload     reloadFunc
+	connDialer *connrotation.Dialer
+
+	// queue only ever has one item, but it has nice error handling backoff/retry semantics
+	queue workqueue.TypedRateLimitingInterface[string]
+}
+
+func certRotatingDialer(reload reloadFunc, dial utilnet.DialFunc) *dynamicClientCert {
+	d := &dynamicClientCert{
+		reload:     reload,
+		connDialer: connrotation.NewDialer(connrotation.DialFunc(dial)),
+		queue: workqueue.NewTypedRateLimitingQueueWithConfig(
+			workqueue.DefaultTypedControllerRateLimiter[string](),
+			workqueue.TypedRateLimitingQueueConfig[string]{Name: "DynamicClientCertificate"},
+		),
+	}
+
+	return d
+}
+
+// loadClientCert calls the callback and rotates connections if needed
+func (c *dynamicClientCert) loadClientCert() (*tls.Certificate, error) {
+	cert, err := c.reload(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// check to see if we have a change. If the values are the same, do nothing.
+	c.certMtx.RLock()
+	haveCert := c.clientCert != nil
+	if certsEqual(c.clientCert, cert) {
+		c.certMtx.RUnlock()
+		return c.clientCert, nil
+	}
+	c.certMtx.RUnlock()
+
+	c.certMtx.Lock()
+	c.clientCert = cert
+	c.certMtx.Unlock()
+
+	// The first certificate requested is not a rotation that is worth closing connections for
+	if !haveCert {
+		return cert, nil
+	}
+
+	klog.V(1).Infof("certificate rotation detected, shutting down client connections to start using new credentials")
+	c.connDialer.CloseAll()
+
+	return cert, nil
+}
+
+// certsEqual compares tls Certificates, ignoring the Leaf which may get filled in dynamically
+func certsEqual(left, right *tls.Certificate) bool {
+	if left == nil || right == nil {
+		return left == right
+	}
+
+	if !byteMatrixEqual(left.Certificate, right.Certificate) {
+		return false
+	}
+
+	if !reflect.DeepEqual(left.PrivateKey, right.PrivateKey) {
+		return false
+	}
+
+	if !byteMatrixEqual(left.SignedCertificateTimestamps, right.SignedCertificateTimestamps) {
+		return false
+	}
+
+	if !bytes.Equal(left.OCSPStaple, right.OCSPStaple) {
+		return false
+	}
+
+	return true
+}
+
+func byteMatrixEqual(left, right [][]byte) bool {
+	if len(left) != len(right) {
+		return false
+	}
+
+	for i := range left {
+		if !bytes.Equal(left[i], right[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// run starts the controller and blocks until stopCh is closed.
+func (c *dynamicClientCert) Run(stopCh <-chan struct{}) {
+	defer utilruntime.HandleCrash()
+	defer c.queue.ShutDown()
+
+	klog.V(3).Infof("Starting client certificate rotation controller")
+	defer klog.V(3).Infof("Shutting down client certificate rotation controller")
+
+	go wait.Until(c.runWorker, time.Second, stopCh)
+
+	go wait.PollImmediateUntil(CertCallbackRefreshDuration, func() (bool, error) {
+		c.queue.Add(workItemKey)
+		return false, nil
+	}, stopCh)
+
+	<-stopCh
+}
+
+func (c *dynamicClientCert) runWorker() {
+	for c.processNextWorkItem() {
+	}
+}
+
+func (c *dynamicClientCert) processNextWorkItem() bool {
+	dsKey, quit := c.queue.Get()
+	if quit {
+		return false
+	}
+	defer c.queue.Done(dsKey)
+
+	_, err := c.loadClientCert()
+	if err == nil {
+		c.queue.Forget(dsKey)
+		return true
+	}
+
+	utilruntime.HandleError(fmt.Errorf("%v failed with : %v", dsKey, err))
+	c.queue.AddRateLimited(dsKey)
+
+	return true
+}
+
+func (c *dynamicClientCert) GetClientCertificate(*tls.CertificateRequestInfo) (*tls.Certificate, error) {
+	return c.loadClientCert()
+}

e2e/vendor/k8s.io/client-go/transport/config.go

@@ -0,0 +1,160 @@
+/*
+Copyright 2015 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 transport
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+	"net/http"
+	"net/url"
+)
+
+// Config holds various options for establishing a transport.
+type Config struct {
+	// UserAgent is an optional field that specifies the caller of this
+	// request.
+	UserAgent string
+
+	// The base TLS configuration for this transport.
+	TLS TLSConfig
+
+	// Username and password for basic authentication
+	Username string
+	Password string `datapolicy:"password"`
+
+	// Bearer token for authentication
+	BearerToken string `datapolicy:"token"`
+
+	// Path to a file containing a BearerToken.
+	// If set, the contents are periodically read.
+	// The last successfully read value takes precedence over BearerToken.
+	BearerTokenFile string
+
+	// Impersonate is the config that this Config will impersonate using
+	Impersonate ImpersonationConfig
+
+	// DisableCompression bypasses automatic GZip compression requests to the
+	// server.
+	DisableCompression bool
+
+	// Transport may be used for custom HTTP behavior. This attribute may
+	// not be specified with the TLS client certificate options. Use
+	// WrapTransport for most client level operations.
+	Transport http.RoundTripper
+
+	// WrapTransport will be invoked for custom HTTP behavior after the
+	// underlying transport is initialized (either the transport created
+	// from TLSClientConfig, Transport, or http.DefaultTransport). The
+	// config may layer other RoundTrippers on top of the returned
+	// RoundTripper.
+	//
+	// A future release will change this field to an array. Use config.Wrap()
+	// instead of setting this value directly.
+	WrapTransport WrapperFunc
+
+	// DialHolder specifies the dial function for creating unencrypted TCP connections.
+	// This struct indirection is used to make transport configs cacheable.
+	DialHolder *DialHolder
+
+	// Proxy is the proxy func to be used for all requests made by this
+	// transport. If Proxy is nil, http.ProxyFromEnvironment is used. If Proxy
+	// returns a nil *URL, no proxy is used.
+	//
+	// socks5 proxying does not currently support spdy streaming endpoints.
+	Proxy func(*http.Request) (*url.URL, error)
+}
+
+// DialHolder is used to make the wrapped function comparable so that it can be used as a map key.
+type DialHolder struct {
+	Dial func(ctx context.Context, network, address string) (net.Conn, error)
+}
+
+// ImpersonationConfig has all the available impersonation options
+type ImpersonationConfig struct {
+	// UserName matches user.Info.GetName()
+	UserName string
+	// UID matches user.Info.GetUID()
+	UID string
+	// Groups matches user.Info.GetGroups()
+	Groups []string
+	// Extra matches user.Info.GetExtra()
+	Extra map[string][]string
+}
+
+// HasCA returns whether the configuration has a certificate authority or not.
+func (c *Config) HasCA() bool {
+	return len(c.TLS.CAData) > 0 || len(c.TLS.CAFile) > 0
+}
+
+// HasBasicAuth returns whether the configuration has basic authentication or not.
+func (c *Config) HasBasicAuth() bool {
+	return len(c.Username) != 0
+}
+
+// HasTokenAuth returns whether the configuration has token authentication or not.
+func (c *Config) HasTokenAuth() bool {
+	return len(c.BearerToken) != 0 || len(c.BearerTokenFile) != 0
+}
+
+// HasCertAuth returns whether the configuration has certificate authentication or not.
+func (c *Config) HasCertAuth() bool {
+	return (len(c.TLS.CertData) != 0 || len(c.TLS.CertFile) != 0) && (len(c.TLS.KeyData) != 0 || len(c.TLS.KeyFile) != 0)
+}
+
+// HasCertCallback returns whether the configuration has certificate callback or not.
+func (c *Config) HasCertCallback() bool {
+	return c.TLS.GetCertHolder != nil
+}
+
+// Wrap adds a transport middleware function that will give the caller
+// an opportunity to wrap the underlying http.RoundTripper prior to the
+// first API call being made. The provided function is invoked after any
+// existing transport wrappers are invoked.
+func (c *Config) Wrap(fn WrapperFunc) {
+	c.WrapTransport = Wrappers(c.WrapTransport, fn)
+}
+
+// TLSConfig holds the information needed to set up a TLS transport.
+type TLSConfig struct {
+	CAFile         string // Path of the PEM-encoded server trusted root certificates.
+	CertFile       string // Path of the PEM-encoded client certificate.
+	KeyFile        string // Path of the PEM-encoded client key.
+	ReloadTLSFiles bool   // Set to indicate that the original config provided files, and that they should be reloaded
+
+	Insecure   bool   // Server should be accessed without verifying the certificate. For testing only.
+	ServerName string // Override for the server name passed to the server for SNI and used to verify certificates.
+
+	CAData   []byte // Bytes of the PEM-encoded server trusted root certificates. Supercedes CAFile.
+	CertData []byte // Bytes of the PEM-encoded client certificate. Supercedes CertFile.
+	KeyData  []byte // Bytes of the PEM-encoded client key. Supercedes KeyFile.
+
+	// NextProtos is a list of supported application level protocols, in order of preference.
+	// Used to populate tls.Config.NextProtos.
+	// To indicate to the server http/1.1 is preferred over http/2, set to ["http/1.1", "h2"] (though the server is free to ignore that preference).
+	// To use only http/1.1, set to ["http/1.1"].
+	NextProtos []string
+
+	// Callback that returns a TLS client certificate. CertData, CertFile, KeyData and KeyFile supercede this field.
+	// This struct indirection is used to make transport configs cacheable.
+	GetCertHolder *GetCertHolder
+}
+
+// GetCertHolder is used to make the wrapped function comparable so that it can be used as a map key.
+type GetCertHolder struct {
+	GetCert func() (*tls.Certificate, error)
+}

e2e/vendor/k8s.io/client-go/transport/round_trippers.go

@@ -0,0 +1,704 @@
+/*
+Copyright 2015 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 transport
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net/http"
+	"net/http/httptrace"
+	"strings"
+	"sync"
+	"time"
+
+	"golang.org/x/oauth2"
+
+	utilnet "k8s.io/apimachinery/pkg/util/net"
+	"k8s.io/klog/v2"
+)
+
+// HTTPWrappersForConfig wraps a round tripper with any relevant layered
+// behavior from the config. Exposed to allow more clients that need HTTP-like
+// behavior but then must hijack the underlying connection (like WebSocket or
+// HTTP2 clients). Pure HTTP clients should use the RoundTripper returned from
+// New.
+func HTTPWrappersForConfig(config *Config, rt http.RoundTripper) (http.RoundTripper, error) {
+	if config.WrapTransport != nil {
+		rt = config.WrapTransport(rt)
+	}
+
+	rt = DebugWrappers(rt)
+
+	// Set authentication wrappers
+	switch {
+	case config.HasBasicAuth() && config.HasTokenAuth():
+		return nil, fmt.Errorf("username/password or bearer token may be set, but not both")
+	case config.HasTokenAuth():
+		var err error
+		rt, err = NewBearerAuthWithRefreshRoundTripper(config.BearerToken, config.BearerTokenFile, rt)
+		if err != nil {
+			return nil, err
+		}
+	case config.HasBasicAuth():
+		rt = NewBasicAuthRoundTripper(config.Username, config.Password, rt)
+	}
+	if len(config.UserAgent) > 0 {
+		rt = NewUserAgentRoundTripper(config.UserAgent, rt)
+	}
+	if len(config.Impersonate.UserName) > 0 ||
+		len(config.Impersonate.UID) > 0 ||
+		len(config.Impersonate.Groups) > 0 ||
+		len(config.Impersonate.Extra) > 0 {
+		rt = NewImpersonatingRoundTripper(config.Impersonate, rt)
+	}
+	return rt, nil
+}
+
+// DebugWrappers wraps a round tripper and logs based on the current log level.
+func DebugWrappers(rt http.RoundTripper) http.RoundTripper {
+	switch {
+	case bool(klog.V(9).Enabled()):
+		rt = NewDebuggingRoundTripper(rt, DebugCurlCommand, DebugURLTiming, DebugDetailedTiming, DebugResponseHeaders)
+	case bool(klog.V(8).Enabled()):
+		rt = NewDebuggingRoundTripper(rt, DebugJustURL, DebugRequestHeaders, DebugResponseStatus, DebugResponseHeaders)
+	case bool(klog.V(7).Enabled()):
+		rt = NewDebuggingRoundTripper(rt, DebugJustURL, DebugRequestHeaders, DebugResponseStatus)
+	case bool(klog.V(6).Enabled()):
+		rt = NewDebuggingRoundTripper(rt, DebugURLTiming)
+	}
+
+	return rt
+}
+
+type authProxyRoundTripper struct {
+	username string
+	uid      string
+	groups   []string
+	extra    map[string][]string
+
+	rt http.RoundTripper
+}
+
+var _ utilnet.RoundTripperWrapper = &authProxyRoundTripper{}
+
+// NewAuthProxyRoundTripper provides a roundtripper which will add auth proxy fields to requests for
+// authentication terminating proxy cases
+// assuming you pull the user from the context:
+// username is the user.Info.GetName() of the user
+// uid is the user.Info.GetUID() of the user
+// groups is the user.Info.GetGroups() of the user
+// extra is the user.Info.GetExtra() of the user
+// extra can contain any additional information that the authenticator
+// thought was interesting, for example authorization scopes.
+// In order to faithfully round-trip through an impersonation flow, these keys
+// MUST be lowercase.
+func NewAuthProxyRoundTripper(username, uid string, groups []string, extra map[string][]string, rt http.RoundTripper) http.RoundTripper {
+	return &authProxyRoundTripper{
+		username: username,
+		uid:      uid,
+		groups:   groups,
+		extra:    extra,
+		rt:       rt,
+	}
+}
+
+func (rt *authProxyRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	req = utilnet.CloneRequest(req)
+	SetAuthProxyHeaders(req, rt.username, rt.uid, rt.groups, rt.extra)
+
+	return rt.rt.RoundTrip(req)
+}
+
+// SetAuthProxyHeaders stomps the auth proxy header fields.  It mutates its argument.
+func SetAuthProxyHeaders(req *http.Request, username, uid string, groups []string, extra map[string][]string) {
+	req.Header.Del("X-Remote-User")
+	req.Header.Del("X-Remote-Uid")
+	req.Header.Del("X-Remote-Group")
+	for key := range req.Header {
+		if strings.HasPrefix(strings.ToLower(key), strings.ToLower("X-Remote-Extra-")) {
+			req.Header.Del(key)
+		}
+	}
+
+	req.Header.Set("X-Remote-User", username)
+	if len(uid) > 0 {
+		req.Header.Set("X-Remote-Uid", uid)
+	}
+	for _, group := range groups {
+		req.Header.Add("X-Remote-Group", group)
+	}
+	for key, values := range extra {
+		for _, value := range values {
+			req.Header.Add("X-Remote-Extra-"+headerKeyEscape(key), value)
+		}
+	}
+}
+
+func (rt *authProxyRoundTripper) CancelRequest(req *http.Request) {
+	tryCancelRequest(rt.WrappedRoundTripper(), req)
+}
+
+func (rt *authProxyRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
+
+type userAgentRoundTripper struct {
+	agent string
+	rt    http.RoundTripper
+}
+
+var _ utilnet.RoundTripperWrapper = &userAgentRoundTripper{}
+
+// NewUserAgentRoundTripper will add User-Agent header to a request unless it has already been set.
+func NewUserAgentRoundTripper(agent string, rt http.RoundTripper) http.RoundTripper {
+	return &userAgentRoundTripper{agent, rt}
+}
+
+func (rt *userAgentRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if len(req.Header.Get("User-Agent")) != 0 {
+		return rt.rt.RoundTrip(req)
+	}
+	req = utilnet.CloneRequest(req)
+	req.Header.Set("User-Agent", rt.agent)
+	return rt.rt.RoundTrip(req)
+}
+
+func (rt *userAgentRoundTripper) CancelRequest(req *http.Request) {
+	tryCancelRequest(rt.WrappedRoundTripper(), req)
+}
+
+func (rt *userAgentRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
+
+type basicAuthRoundTripper struct {
+	username string
+	password string `datapolicy:"password"`
+	rt       http.RoundTripper
+}
+
+var _ utilnet.RoundTripperWrapper = &basicAuthRoundTripper{}
+
+// NewBasicAuthRoundTripper will apply a BASIC auth authorization header to a
+// request unless it has already been set.
+func NewBasicAuthRoundTripper(username, password string, rt http.RoundTripper) http.RoundTripper {
+	return &basicAuthRoundTripper{username, password, rt}
+}
+
+func (rt *basicAuthRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if len(req.Header.Get("Authorization")) != 0 {
+		return rt.rt.RoundTrip(req)
+	}
+	req = utilnet.CloneRequest(req)
+	req.SetBasicAuth(rt.username, rt.password)
+	return rt.rt.RoundTrip(req)
+}
+
+func (rt *basicAuthRoundTripper) CancelRequest(req *http.Request) {
+	tryCancelRequest(rt.WrappedRoundTripper(), req)
+}
+
+func (rt *basicAuthRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
+
+// These correspond to the headers used in pkg/apis/authentication.  We don't want the package dependency,
+// but you must not change the values.
+const (
+	// ImpersonateUserHeader is used to impersonate a particular user during an API server request
+	ImpersonateUserHeader = "Impersonate-User"
+
+	// ImpersonateUIDHeader is used to impersonate a particular UID during an API server request
+	ImpersonateUIDHeader = "Impersonate-Uid"
+
+	// ImpersonateGroupHeader is used to impersonate a particular group during an API server request.
+	// It can be repeated multiplied times for multiple groups.
+	ImpersonateGroupHeader = "Impersonate-Group"
+
+	// ImpersonateUserExtraHeaderPrefix is a prefix for a header used to impersonate an entry in the
+	// extra map[string][]string for user.Info.  The key for the `extra` map is suffix.
+	// The same key can be repeated multiple times to have multiple elements in the slice under a single key.
+	// For instance:
+	// Impersonate-Extra-Foo: one
+	// Impersonate-Extra-Foo: two
+	// results in extra["Foo"] = []string{"one", "two"}
+	ImpersonateUserExtraHeaderPrefix = "Impersonate-Extra-"
+)
+
+type impersonatingRoundTripper struct {
+	impersonate ImpersonationConfig
+	delegate    http.RoundTripper
+}
+
+var _ utilnet.RoundTripperWrapper = &impersonatingRoundTripper{}
+
+// NewImpersonatingRoundTripper will add an Act-As header to a request unless it has already been set.
+func NewImpersonatingRoundTripper(impersonate ImpersonationConfig, delegate http.RoundTripper) http.RoundTripper {
+	return &impersonatingRoundTripper{impersonate, delegate}
+}
+
+func (rt *impersonatingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	// use the user header as marker for the rest.
+	if len(req.Header.Get(ImpersonateUserHeader)) != 0 {
+		return rt.delegate.RoundTrip(req)
+	}
+	req = utilnet.CloneRequest(req)
+	req.Header.Set(ImpersonateUserHeader, rt.impersonate.UserName)
+	if rt.impersonate.UID != "" {
+		req.Header.Set(ImpersonateUIDHeader, rt.impersonate.UID)
+	}
+	for _, group := range rt.impersonate.Groups {
+		req.Header.Add(ImpersonateGroupHeader, group)
+	}
+	for k, vv := range rt.impersonate.Extra {
+		for _, v := range vv {
+			req.Header.Add(ImpersonateUserExtraHeaderPrefix+headerKeyEscape(k), v)
+		}
+	}
+
+	return rt.delegate.RoundTrip(req)
+}
+
+func (rt *impersonatingRoundTripper) CancelRequest(req *http.Request) {
+	tryCancelRequest(rt.WrappedRoundTripper(), req)
+}
+
+func (rt *impersonatingRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.delegate }
+
+type bearerAuthRoundTripper struct {
+	bearer string
+	source oauth2.TokenSource
+	rt     http.RoundTripper
+}
+
+var _ utilnet.RoundTripperWrapper = &bearerAuthRoundTripper{}
+
+// NewBearerAuthRoundTripper adds the provided bearer token to a request
+// unless the authorization header has already been set.
+func NewBearerAuthRoundTripper(bearer string, rt http.RoundTripper) http.RoundTripper {
+	return &bearerAuthRoundTripper{bearer, nil, rt}
+}
+
+// NewBearerAuthWithRefreshRoundTripper adds the provided bearer token to a request
+// unless the authorization header has already been set.
+// If tokenFile is non-empty, it is periodically read,
+// and the last successfully read content is used as the bearer token.
+// If tokenFile is non-empty and bearer is empty, the tokenFile is read
+// immediately to populate the initial bearer token.
+func NewBearerAuthWithRefreshRoundTripper(bearer string, tokenFile string, rt http.RoundTripper) (http.RoundTripper, error) {
+	if len(tokenFile) == 0 {
+		return &bearerAuthRoundTripper{bearer, nil, rt}, nil
+	}
+	source := NewCachedFileTokenSource(tokenFile)
+	if len(bearer) == 0 {
+		token, err := source.Token()
+		if err != nil {
+			return nil, err
+		}
+		bearer = token.AccessToken
+	}
+	return &bearerAuthRoundTripper{bearer, source, rt}, nil
+}
+
+func (rt *bearerAuthRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if len(req.Header.Get("Authorization")) != 0 {
+		return rt.rt.RoundTrip(req)
+	}
+
+	req = utilnet.CloneRequest(req)
+	token := rt.bearer
+	if rt.source != nil {
+		if refreshedToken, err := rt.source.Token(); err == nil {
+			token = refreshedToken.AccessToken
+		}
+	}
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
+	return rt.rt.RoundTrip(req)
+}
+
+func (rt *bearerAuthRoundTripper) CancelRequest(req *http.Request) {
+	tryCancelRequest(rt.WrappedRoundTripper(), req)
+}
+
+func (rt *bearerAuthRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
+
+// requestInfo keeps track of information about a request/response combination
+type requestInfo struct {
+	RequestHeaders http.Header `datapolicy:"token"`
+	RequestVerb    string
+	RequestURL     string
+
+	ResponseStatus  string
+	ResponseHeaders http.Header
+	ResponseErr     error
+
+	muTrace          sync.Mutex // Protect trace fields
+	DNSLookup        time.Duration
+	Dialing          time.Duration
+	GetConnection    time.Duration
+	TLSHandshake     time.Duration
+	ServerProcessing time.Duration
+	ConnectionReused bool
+
+	Duration time.Duration
+}
+
+// newRequestInfo creates a new RequestInfo based on an http request
+func newRequestInfo(req *http.Request) *requestInfo {
+	return &requestInfo{
+		RequestURL:     req.URL.String(),
+		RequestVerb:    req.Method,
+		RequestHeaders: req.Header,
+	}
+}
+
+// complete adds information about the response to the requestInfo
+func (r *requestInfo) complete(response *http.Response, err error) {
+	if err != nil {
+		r.ResponseErr = err
+		return
+	}
+	r.ResponseStatus = response.Status
+	r.ResponseHeaders = response.Header
+}
+
+// toCurl returns a string that can be run as a command in a terminal (minus the body)
+func (r *requestInfo) toCurl() string {
+	headers := ""
+	for key, values := range r.RequestHeaders {
+		for _, value := range values {
+			value = maskValue(key, value)
+			headers += fmt.Sprintf(` -H %q`, fmt.Sprintf("%s: %s", key, value))
+		}
+	}
+
+	return fmt.Sprintf("curl -v -X%s %s '%s'", r.RequestVerb, headers, r.RequestURL)
+}
+
+// debuggingRoundTripper will display information about the requests passing
+// through it based on what is configured
+type debuggingRoundTripper struct {
+	delegatedRoundTripper http.RoundTripper
+	levels                map[DebugLevel]bool
+}
+
+var _ utilnet.RoundTripperWrapper = &debuggingRoundTripper{}
+
+// DebugLevel is used to enable debugging of certain
+// HTTP requests and responses fields via the debuggingRoundTripper.
+type DebugLevel int
+
+const (
+	// DebugJustURL will add to the debug output HTTP requests method and url.
+	DebugJustURL DebugLevel = iota
+	// DebugURLTiming will add to the debug output the duration of HTTP requests.
+	DebugURLTiming
+	// DebugCurlCommand will add to the debug output the curl command equivalent to the
+	// HTTP request.
+	DebugCurlCommand
+	// DebugRequestHeaders will add to the debug output the HTTP requests headers.
+	DebugRequestHeaders
+	// DebugResponseStatus will add to the debug output the HTTP response status.
+	DebugResponseStatus
+	// DebugResponseHeaders will add to the debug output the HTTP response headers.
+	DebugResponseHeaders
+	// DebugDetailedTiming will add to the debug output the duration of the HTTP requests events.
+	DebugDetailedTiming
+)
+
+// NewDebuggingRoundTripper allows to display in the logs output debug information
+// on the API requests performed by the client.
+func NewDebuggingRoundTripper(rt http.RoundTripper, levels ...DebugLevel) http.RoundTripper {
+	drt := &debuggingRoundTripper{
+		delegatedRoundTripper: rt,
+		levels:                make(map[DebugLevel]bool, len(levels)),
+	}
+	for _, v := range levels {
+		drt.levels[v] = true
+	}
+	return drt
+}
+
+func (rt *debuggingRoundTripper) CancelRequest(req *http.Request) {
+	tryCancelRequest(rt.WrappedRoundTripper(), req)
+}
+
+var knownAuthTypes = map[string]bool{
+	"bearer":    true,
+	"basic":     true,
+	"negotiate": true,
+}
+
+// maskValue masks credential content from authorization headers
+// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Authorization
+func maskValue(key string, value string) string {
+	if !strings.EqualFold(key, "Authorization") {
+		return value
+	}
+	if len(value) == 0 {
+		return ""
+	}
+	var authType string
+	if i := strings.Index(value, " "); i > 0 {
+		authType = value[0:i]
+	} else {
+		authType = value
+	}
+	if !knownAuthTypes[strings.ToLower(authType)] {
+		return "<masked>"
+	}
+	if len(value) > len(authType)+1 {
+		value = authType + " <masked>"
+	} else {
+		value = authType
+	}
+	return value
+}
+
+func (rt *debuggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	reqInfo := newRequestInfo(req)
+
+	if rt.levels[DebugJustURL] {
+		klog.Infof("%s %s", reqInfo.RequestVerb, reqInfo.RequestURL)
+	}
+	if rt.levels[DebugCurlCommand] {
+		klog.Infof("%s", reqInfo.toCurl())
+	}
+	if rt.levels[DebugRequestHeaders] {
+		klog.Info("Request Headers:")
+		for key, values := range reqInfo.RequestHeaders {
+			for _, value := range values {
+				value = maskValue(key, value)
+				klog.Infof("    %s: %s", key, value)
+			}
+		}
+	}
+
+	startTime := time.Now()
+
+	if rt.levels[DebugDetailedTiming] {
+		var getConn, dnsStart, dialStart, tlsStart, serverStart time.Time
+		var host string
+		trace := &httptrace.ClientTrace{
+			// DNS
+			DNSStart: func(info httptrace.DNSStartInfo) {
+				reqInfo.muTrace.Lock()
+				defer reqInfo.muTrace.Unlock()
+				dnsStart = time.Now()
+				host = info.Host
+			},
+			DNSDone: func(info httptrace.DNSDoneInfo) {
+				reqInfo.muTrace.Lock()
+				defer reqInfo.muTrace.Unlock()
+				reqInfo.DNSLookup = time.Since(dnsStart)
+				klog.Infof("HTTP Trace: DNS Lookup for %s resolved to %v", host, info.Addrs)
+			},
+			// Dial
+			ConnectStart: func(network, addr string) {
+				reqInfo.muTrace.Lock()
+				defer reqInfo.muTrace.Unlock()
+				dialStart = time.Now()
+			},
+			ConnectDone: func(network, addr string, err error) {
+				reqInfo.muTrace.Lock()
+				defer reqInfo.muTrace.Unlock()
+				reqInfo.Dialing = time.Since(dialStart)
+				if err != nil {
+					klog.Infof("HTTP Trace: Dial to %s:%s failed: %v", network, addr, err)
+				} else {
+					klog.Infof("HTTP Trace: Dial to %s:%s succeed", network, addr)
+				}
+			},
+			// TLS
+			TLSHandshakeStart: func() {
+				tlsStart = time.Now()
+			},
+			TLSHandshakeDone: func(_ tls.ConnectionState, _ error) {
+				reqInfo.muTrace.Lock()
+				defer reqInfo.muTrace.Unlock()
+				reqInfo.TLSHandshake = time.Since(tlsStart)
+			},
+			// Connection (it can be DNS + Dial or just the time to get one from the connection pool)
+			GetConn: func(hostPort string) {
+				getConn = time.Now()
+			},
+			GotConn: func(info httptrace.GotConnInfo) {
+				reqInfo.muTrace.Lock()
+				defer reqInfo.muTrace.Unlock()
+				reqInfo.GetConnection = time.Since(getConn)
+				reqInfo.ConnectionReused = info.Reused
+			},
+			// Server Processing (time since we wrote the request until first byte is received)
+			WroteRequest: func(info httptrace.WroteRequestInfo) {
+				reqInfo.muTrace.Lock()
+				defer reqInfo.muTrace.Unlock()
+				serverStart = time.Now()
+			},
+			GotFirstResponseByte: func() {
+				reqInfo.muTrace.Lock()
+				defer reqInfo.muTrace.Unlock()
+				reqInfo.ServerProcessing = time.Since(serverStart)
+			},
+		}
+		req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
+	}
+
+	response, err := rt.delegatedRoundTripper.RoundTrip(req)
+	reqInfo.Duration = time.Since(startTime)
+
+	reqInfo.complete(response, err)
+
+	if rt.levels[DebugURLTiming] {
+		klog.Infof("%s %s %s in %d milliseconds", reqInfo.RequestVerb, reqInfo.RequestURL, reqInfo.ResponseStatus, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
+	}
+	if rt.levels[DebugDetailedTiming] {
+		stats := ""
+		if !reqInfo.ConnectionReused {
+			stats += fmt.Sprintf(`DNSLookup %d ms Dial %d ms TLSHandshake %d ms`,
+				reqInfo.DNSLookup.Nanoseconds()/int64(time.Millisecond),
+				reqInfo.Dialing.Nanoseconds()/int64(time.Millisecond),
+				reqInfo.TLSHandshake.Nanoseconds()/int64(time.Millisecond),
+			)
+		} else {
+			stats += fmt.Sprintf(`GetConnection %d ms`, reqInfo.GetConnection.Nanoseconds()/int64(time.Millisecond))
+		}
+		if reqInfo.ServerProcessing != 0 {
+			stats += fmt.Sprintf(` ServerProcessing %d ms`, reqInfo.ServerProcessing.Nanoseconds()/int64(time.Millisecond))
+		}
+		stats += fmt.Sprintf(` Duration %d ms`, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
+		klog.Infof("HTTP Statistics: %s", stats)
+	}
+
+	if rt.levels[DebugResponseStatus] {
+		klog.Infof("Response Status: %s in %d milliseconds", reqInfo.ResponseStatus, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
+	}
+	if rt.levels[DebugResponseHeaders] {
+		klog.Info("Response Headers:")
+		for key, values := range reqInfo.ResponseHeaders {
+			for _, value := range values {
+				klog.Infof("    %s: %s", key, value)
+			}
+		}
+	}
+
+	return response, err
+}
+
+func (rt *debuggingRoundTripper) WrappedRoundTripper() http.RoundTripper {
+	return rt.delegatedRoundTripper
+}
+
+func legalHeaderByte(b byte) bool {
+	return int(b) < len(legalHeaderKeyBytes) && legalHeaderKeyBytes[b]
+}
+
+func shouldEscape(b byte) bool {
+	// url.PathUnescape() returns an error if any '%' is not followed by two
+	// hexadecimal digits, so we'll intentionally encode it.
+	return !legalHeaderByte(b) || b == '%'
+}
+
+func headerKeyEscape(key string) string {
+	buf := strings.Builder{}
+	for i := 0; i < len(key); i++ {
+		b := key[i]
+		if shouldEscape(b) {
+			// %-encode bytes that should be escaped:
+			// https://tools.ietf.org/html/rfc3986#section-2.1
+			fmt.Fprintf(&buf, "%%%02X", b)
+			continue
+		}
+		buf.WriteByte(b)
+	}
+	return buf.String()
+}
+
+// legalHeaderKeyBytes was copied from net/http/lex.go's isTokenTable.
+// See https://httpwg.github.io/specs/rfc7230.html#rule.token.separators
+var legalHeaderKeyBytes = [127]bool{
+	'%':  true,
+	'!':  true,
+	'#':  true,
+	'$':  true,
+	'&':  true,
+	'\'': true,
+	'*':  true,
+	'+':  true,
+	'-':  true,
+	'.':  true,
+	'0':  true,
+	'1':  true,
+	'2':  true,
+	'3':  true,
+	'4':  true,
+	'5':  true,
+	'6':  true,
+	'7':  true,
+	'8':  true,
+	'9':  true,
+	'A':  true,
+	'B':  true,
+	'C':  true,
+	'D':  true,
+	'E':  true,
+	'F':  true,
+	'G':  true,
+	'H':  true,
+	'I':  true,
+	'J':  true,
+	'K':  true,
+	'L':  true,
+	'M':  true,
+	'N':  true,
+	'O':  true,
+	'P':  true,
+	'Q':  true,
+	'R':  true,
+	'S':  true,
+	'T':  true,
+	'U':  true,
+	'W':  true,
+	'V':  true,
+	'X':  true,
+	'Y':  true,
+	'Z':  true,
+	'^':  true,
+	'_':  true,
+	'`':  true,
+	'a':  true,
+	'b':  true,
+	'c':  true,
+	'd':  true,
+	'e':  true,
+	'f':  true,
+	'g':  true,
+	'h':  true,
+	'i':  true,
+	'j':  true,
+	'k':  true,
+	'l':  true,
+	'm':  true,
+	'n':  true,
+	'o':  true,
+	'p':  true,
+	'q':  true,
+	'r':  true,
+	's':  true,
+	't':  true,
+	'u':  true,
+	'v':  true,
+	'w':  true,
+	'x':  true,
+	'y':  true,
+	'z':  true,
+	'|':  true,
+	'~':  true,
+}

e2e/vendor/k8s.io/client-go/transport/spdy/spdy.go

@@ -0,0 +1,107 @@
+/*
+Copyright 2017 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 spdy
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"time"
+
+	"k8s.io/apimachinery/pkg/util/httpstream"
+	"k8s.io/apimachinery/pkg/util/httpstream/spdy"
+	restclient "k8s.io/client-go/rest"
+)
+
+// Upgrader validates a response from the server after a SPDY upgrade.
+type Upgrader interface {
+	// NewConnection validates the response and creates a new Connection.
+	NewConnection(resp *http.Response) (httpstream.Connection, error)
+}
+
+// RoundTripperFor returns a round tripper and upgrader to use with SPDY.
+func RoundTripperFor(config *restclient.Config) (http.RoundTripper, Upgrader, error) {
+	tlsConfig, err := restclient.TLSConfigFor(config)
+	if err != nil {
+		return nil, nil, err
+	}
+	proxy := http.ProxyFromEnvironment
+	if config.Proxy != nil {
+		proxy = config.Proxy
+	}
+	upgradeRoundTripper, err := spdy.NewRoundTripperWithConfig(spdy.RoundTripperConfig{
+		TLS:              tlsConfig,
+		Proxier:          proxy,
+		PingPeriod:       time.Second * 5,
+		UpgradeTransport: nil,
+	})
+	if err != nil {
+		return nil, nil, err
+	}
+	wrapper, err := restclient.HTTPWrappersForConfig(config, upgradeRoundTripper)
+	if err != nil {
+		return nil, nil, err
+	}
+	return wrapper, upgradeRoundTripper, nil
+}
+
+// dialer implements the httpstream.Dialer interface.
+type dialer struct {
+	client   *http.Client
+	upgrader Upgrader
+	method   string
+	url      *url.URL
+}
+
+var _ httpstream.Dialer = &dialer{}
+
+// NewDialer will create a dialer that connects to the provided URL and upgrades the connection to SPDY.
+func NewDialer(upgrader Upgrader, client *http.Client, method string, url *url.URL) httpstream.Dialer {
+	return &dialer{
+		client:   client,
+		upgrader: upgrader,
+		method:   method,
+		url:      url,
+	}
+}
+
+func (d *dialer) Dial(protocols ...string) (httpstream.Connection, string, error) {
+	req, err := http.NewRequest(d.method, d.url.String(), nil)
+	if err != nil {
+		return nil, "", fmt.Errorf("error creating request: %v", err)
+	}
+	return Negotiate(d.upgrader, d.client, req, protocols...)
+}
+
+// Negotiate opens a connection to a remote server and attempts to negotiate
+// a SPDY connection. Upon success, it returns the connection and the protocol selected by
+// the server. The client transport must use the upgradeRoundTripper - see RoundTripperFor.
+func Negotiate(upgrader Upgrader, client *http.Client, req *http.Request, protocols ...string) (httpstream.Connection, string, error) {
+	for i := range protocols {
+		req.Header.Add(httpstream.HeaderProtocolVersion, protocols[i])
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, "", fmt.Errorf("error sending request: %v", err)
+	}
+	defer resp.Body.Close()
+	conn, err := upgrader.NewConnection(resp)
+	if err != nil {
+		return nil, "", err
+	}
+	return conn, resp.Header.Get(httpstream.HeaderProtocolVersion), nil
+}

e2e/vendor/k8s.io/client-go/transport/token_source.go

@@ -0,0 +1,201 @@
+/*
+Copyright 2018 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 transport
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"sync"
+	"time"
+
+	"golang.org/x/oauth2"
+
+	utilnet "k8s.io/apimachinery/pkg/util/net"
+	"k8s.io/klog/v2"
+)
+
+// TokenSourceWrapTransport returns a WrapTransport that injects bearer tokens
+// authentication from an oauth2.TokenSource.
+func TokenSourceWrapTransport(ts oauth2.TokenSource) func(http.RoundTripper) http.RoundTripper {
+	return func(rt http.RoundTripper) http.RoundTripper {
+		return &tokenSourceTransport{
+			base: rt,
+			ort: &oauth2.Transport{
+				Source: ts,
+				Base:   rt,
+			},
+		}
+	}
+}
+
+type ResettableTokenSource interface {
+	oauth2.TokenSource
+	ResetTokenOlderThan(time.Time)
+}
+
+// ResettableTokenSourceWrapTransport returns a WrapTransport that injects bearer tokens
+// authentication from an ResettableTokenSource.
+func ResettableTokenSourceWrapTransport(ts ResettableTokenSource) func(http.RoundTripper) http.RoundTripper {
+	return func(rt http.RoundTripper) http.RoundTripper {
+		return &tokenSourceTransport{
+			base: rt,
+			ort: &oauth2.Transport{
+				Source: ts,
+				Base:   rt,
+			},
+			src: ts,
+		}
+	}
+}
+
+// NewCachedFileTokenSource returns a resettable token source which reads a
+// token from a file at a specified path and periodically reloads it.
+func NewCachedFileTokenSource(path string) *cachingTokenSource {
+	return &cachingTokenSource{
+		now:    time.Now,
+		leeway: 10 * time.Second,
+		base: &fileTokenSource{
+			path: path,
+			// This period was picked because it is half of the duration between when the kubelet
+			// refreshes a projected service account token and when the original token expires.
+			// Default token lifetime is 10 minutes, and the kubelet starts refreshing at 80% of lifetime.
+			// This should induce re-reading at a frequency that works with the token volume source.
+			period: time.Minute,
+		},
+	}
+}
+
+// NewCachedTokenSource returns resettable token source with caching. It reads
+// a token from a designed TokenSource if not in cache or expired.
+func NewCachedTokenSource(ts oauth2.TokenSource) *cachingTokenSource {
+	return &cachingTokenSource{
+		now:  time.Now,
+		base: ts,
+	}
+}
+
+type tokenSourceTransport struct {
+	base http.RoundTripper
+	ort  http.RoundTripper
+	src  ResettableTokenSource
+}
+
+var _ utilnet.RoundTripperWrapper = &tokenSourceTransport{}
+
+func (tst *tokenSourceTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	// This is to allow --token to override other bearer token providers.
+	if req.Header.Get("Authorization") != "" {
+		return tst.base.RoundTrip(req)
+	}
+	// record time before RoundTrip to make sure newly acquired Unauthorized
+	// token would not be reset. Another request from user is required to reset
+	// and proceed.
+	start := time.Now()
+	resp, err := tst.ort.RoundTrip(req)
+	if err == nil && resp != nil && resp.StatusCode == 401 && tst.src != nil {
+		tst.src.ResetTokenOlderThan(start)
+	}
+	return resp, err
+}
+
+func (tst *tokenSourceTransport) CancelRequest(req *http.Request) {
+	if req.Header.Get("Authorization") != "" {
+		tryCancelRequest(tst.base, req)
+		return
+	}
+	tryCancelRequest(tst.ort, req)
+}
+
+func (tst *tokenSourceTransport) WrappedRoundTripper() http.RoundTripper { return tst.base }
+
+type fileTokenSource struct {
+	path   string
+	period time.Duration
+}
+
+var _ = oauth2.TokenSource(&fileTokenSource{})
+
+func (ts *fileTokenSource) Token() (*oauth2.Token, error) {
+	tokb, err := os.ReadFile(ts.path)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read token file %q: %v", ts.path, err)
+	}
+	tok := strings.TrimSpace(string(tokb))
+	if len(tok) == 0 {
+		return nil, fmt.Errorf("read empty token from file %q", ts.path)
+	}
+
+	return &oauth2.Token{
+		AccessToken: tok,
+		Expiry:      time.Now().Add(ts.period),
+	}, nil
+}
+
+type cachingTokenSource struct {
+	base   oauth2.TokenSource
+	leeway time.Duration
+
+	sync.RWMutex
+	tok *oauth2.Token
+	t   time.Time
+
+	// for testing
+	now func() time.Time
+}
+
+func (ts *cachingTokenSource) Token() (*oauth2.Token, error) {
+	now := ts.now()
+	// fast path
+	ts.RLock()
+	tok := ts.tok
+	ts.RUnlock()
+
+	if tok != nil && tok.Expiry.Add(-1*ts.leeway).After(now) {
+		return tok, nil
+	}
+
+	// slow path
+	ts.Lock()
+	defer ts.Unlock()
+	if tok := ts.tok; tok != nil && tok.Expiry.Add(-1*ts.leeway).After(now) {
+		return tok, nil
+	}
+
+	tok, err := ts.base.Token()
+	if err != nil {
+		if ts.tok == nil {
+			return nil, err
+		}
+		klog.Errorf("Unable to rotate token: %v", err)
+		return ts.tok, nil
+	}
+
+	ts.t = ts.now()
+	ts.tok = tok
+	return tok, nil
+}
+
+func (ts *cachingTokenSource) ResetTokenOlderThan(t time.Time) {
+	ts.Lock()
+	defer ts.Unlock()
+	if ts.t.Before(t) {
+		ts.tok = nil
+		ts.t = time.Time{}
+	}
+}

e2e/vendor/k8s.io/client-go/transport/transport.go

@@ -0,0 +1,399 @@
+/*
+Copyright 2015 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 transport
+
+import (
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/pem"
+	"fmt"
+	"net/http"
+	"os"
+	"sync"
+	"time"
+
+	utilnet "k8s.io/apimachinery/pkg/util/net"
+	"k8s.io/klog/v2"
+)
+
+// New returns an http.RoundTripper that will provide the authentication
+// or transport level security defined by the provided Config.
+func New(config *Config) (http.RoundTripper, error) {
+	// Set transport level security
+	if config.Transport != nil && (config.HasCA() || config.HasCertAuth() || config.HasCertCallback() || config.TLS.Insecure) {
+		return nil, fmt.Errorf("using a custom transport with TLS certificate options or the insecure flag is not allowed")
+	}
+
+	if !isValidHolders(config) {
+		return nil, fmt.Errorf("misconfigured holder for dialer or cert callback")
+	}
+
+	var (
+		rt  http.RoundTripper
+		err error
+	)
+
+	if config.Transport != nil {
+		rt = config.Transport
+	} else {
+		rt, err = tlsCache.get(config)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return HTTPWrappersForConfig(config, rt)
+}
+
+func isValidHolders(config *Config) bool {
+	if config.TLS.GetCertHolder != nil && config.TLS.GetCertHolder.GetCert == nil {
+		return false
+	}
+
+	if config.DialHolder != nil && config.DialHolder.Dial == nil {
+		return false
+	}
+
+	return true
+}
+
+// TLSConfigFor returns a tls.Config that will provide the transport level security defined
+// by the provided Config. Will return nil if no transport level security is requested.
+func TLSConfigFor(c *Config) (*tls.Config, error) {
+	if !(c.HasCA() || c.HasCertAuth() || c.HasCertCallback() || c.TLS.Insecure || len(c.TLS.ServerName) > 0 || len(c.TLS.NextProtos) > 0) {
+		return nil, nil
+	}
+	if c.HasCA() && c.TLS.Insecure {
+		return nil, fmt.Errorf("specifying a root certificates file with the insecure flag is not allowed")
+	}
+	if err := loadTLSFiles(c); err != nil {
+		return nil, err
+	}
+
+	tlsConfig := &tls.Config{
+		// Can't use SSLv3 because of POODLE and BEAST
+		// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
+		// Can't use TLSv1.1 because of RC4 cipher usage
+		MinVersion:         tls.VersionTLS12,
+		InsecureSkipVerify: c.TLS.Insecure,
+		ServerName:         c.TLS.ServerName,
+		NextProtos:         c.TLS.NextProtos,
+	}
+
+	if c.HasCA() {
+		/*
+			kubernetes mutual (2-way) x509 between client and apiserver:
+
+				1. apiserver sending its apiserver certificate along with its publickey to client
+				>2. client verifies the apiserver certificate sent against its cluster certificate authority data
+				3. client sending its client certificate along with its public key to the apiserver
+				4. apiserver verifies the client certificate sent against its cluster certificate authority data
+
+				description:
+					here, with this block,
+					cluster certificate authority data gets loaded into TLS before the handshake process
+					for client to later during the handshake verify the apiserver certificate
+
+				normal args related to this stage:
+					--certificate-authority='':
+						Path to a cert file for the certificate authority
+
+					(retrievable from "kubectl options" command)
+					(suggested by @deads2k)
+
+				see also:
+					- for the step 1, see: staging/src/k8s.io/apiserver/pkg/server/options/serving.go
+					- for the step 3, see: a few lines below in this file
+					- for the step 4, see: staging/src/k8s.io/apiserver/pkg/authentication/request/x509/x509.go
+		*/
+
+		rootCAs, err := rootCertPool(c.TLS.CAData)
+		if err != nil {
+			return nil, fmt.Errorf("unable to load root certificates: %w", err)
+		}
+		tlsConfig.RootCAs = rootCAs
+	}
+
+	var staticCert *tls.Certificate
+	// Treat cert as static if either key or cert was data, not a file
+	if c.HasCertAuth() && !c.TLS.ReloadTLSFiles {
+		// If key/cert were provided, verify them before setting up
+		// tlsConfig.GetClientCertificate.
+		cert, err := tls.X509KeyPair(c.TLS.CertData, c.TLS.KeyData)
+		if err != nil {
+			return nil, err
+		}
+		staticCert = &cert
+	}
+
+	var dynamicCertLoader func() (*tls.Certificate, error)
+	if c.TLS.ReloadTLSFiles {
+		dynamicCertLoader = cachingCertificateLoader(c.TLS.CertFile, c.TLS.KeyFile)
+	}
+
+	if c.HasCertAuth() || c.HasCertCallback() {
+
+		/*
+			    kubernetes mutual (2-way) x509 between client and apiserver:
+
+					1. apiserver sending its apiserver certificate along with its publickey to client
+					2. client verifies the apiserver certificate sent against its cluster certificate authority data
+					>3. client sending its client certificate along with its public key to the apiserver
+					4. apiserver verifies the client certificate sent against its cluster certificate authority data
+
+					description:
+						here, with this callback function,
+						client certificate and pub key get loaded into TLS during the handshake process
+						for apiserver to later in the step 4 verify the client certificate
+
+					normal args related to this stage:
+						--client-certificate='':
+							Path to a client certificate file for TLS
+						--client-key='':
+							Path to a client key file for TLS
+
+						(retrievable from "kubectl options" command)
+						(suggested by @deads2k)
+
+					see also:
+						- for the step 1, see: staging/src/k8s.io/apiserver/pkg/server/options/serving.go
+						- for the step 2, see: a few lines above in this file
+						- for the step 4, see: staging/src/k8s.io/apiserver/pkg/authentication/request/x509/x509.go
+		*/
+
+		tlsConfig.GetClientCertificate = func(*tls.CertificateRequestInfo) (*tls.Certificate, error) {
+			// Note: static key/cert data always take precedence over cert
+			// callback.
+			if staticCert != nil {
+				return staticCert, nil
+			}
+			// key/cert files lead to ReloadTLSFiles being set - takes precedence over cert callback
+			if dynamicCertLoader != nil {
+				return dynamicCertLoader()
+			}
+			if c.HasCertCallback() {
+				cert, err := c.TLS.GetCertHolder.GetCert()
+				if err != nil {
+					return nil, err
+				}
+				// GetCert may return empty value, meaning no cert.
+				if cert != nil {
+					return cert, nil
+				}
+			}
+
+			// Both c.TLS.CertData/KeyData were unset and GetCert didn't return
+			// anything. Return an empty tls.Certificate, no client cert will
+			// be sent to the server.
+			return &tls.Certificate{}, nil
+		}
+	}
+
+	return tlsConfig, nil
+}
+
+// loadTLSFiles copies the data from the CertFile, KeyFile, and CAFile fields into the CertData,
+// KeyData, and CAFile fields, or returns an error. If no error is returned, all three fields are
+// either populated or were empty to start.
+func loadTLSFiles(c *Config) error {
+	var err error
+	c.TLS.CAData, err = dataFromSliceOrFile(c.TLS.CAData, c.TLS.CAFile)
+	if err != nil {
+		return err
+	}
+
+	// Check that we are purely loading from files
+	if len(c.TLS.CertFile) > 0 && len(c.TLS.CertData) == 0 && len(c.TLS.KeyFile) > 0 && len(c.TLS.KeyData) == 0 {
+		c.TLS.ReloadTLSFiles = true
+	}
+
+	c.TLS.CertData, err = dataFromSliceOrFile(c.TLS.CertData, c.TLS.CertFile)
+	if err != nil {
+		return err
+	}
+
+	c.TLS.KeyData, err = dataFromSliceOrFile(c.TLS.KeyData, c.TLS.KeyFile)
+	return err
+}
+
+// dataFromSliceOrFile returns data from the slice (if non-empty), or from the file,
+// or an error if an error occurred reading the file
+func dataFromSliceOrFile(data []byte, file string) ([]byte, error) {
+	if len(data) > 0 {
+		return data, nil
+	}
+	if len(file) > 0 {
+		fileData, err := os.ReadFile(file)
+		if err != nil {
+			return []byte{}, err
+		}
+		return fileData, nil
+	}
+	return nil, nil
+}
+
+// rootCertPool returns nil if caData is empty.  When passed along, this will mean "use system CAs".
+// When caData is not empty, it will be the ONLY information used in the CertPool.
+func rootCertPool(caData []byte) (*x509.CertPool, error) {
+	// What we really want is a copy of x509.systemRootsPool, but that isn't exposed.  It's difficult to build (see the go
+	// code for a look at the platform specific insanity), so we'll use the fact that RootCAs == nil gives us the system values
+	// It doesn't allow trusting either/or, but hopefully that won't be an issue
+	if len(caData) == 0 {
+		return nil, nil
+	}
+
+	// if we have caData, use it
+	certPool := x509.NewCertPool()
+	if ok := certPool.AppendCertsFromPEM(caData); !ok {
+		return nil, createErrorParsingCAData(caData)
+	}
+	return certPool, nil
+}
+
+// createErrorParsingCAData ALWAYS returns an error.  We call it because know we failed to AppendCertsFromPEM
+// but we don't know the specific error because that API is just true/false
+func createErrorParsingCAData(pemCerts []byte) error {
+	for len(pemCerts) > 0 {
+		var block *pem.Block
+		block, pemCerts = pem.Decode(pemCerts)
+		if block == nil {
+			return fmt.Errorf("unable to parse bytes as PEM block")
+		}
+
+		if block.Type != "CERTIFICATE" || len(block.Headers) != 0 {
+			continue
+		}
+
+		if _, err := x509.ParseCertificate(block.Bytes); err != nil {
+			return fmt.Errorf("failed to parse certificate: %w", err)
+		}
+	}
+	return fmt.Errorf("no valid certificate authority data seen")
+}
+
+// WrapperFunc wraps an http.RoundTripper when a new transport
+// is created for a client, allowing per connection behavior
+// to be injected.
+type WrapperFunc func(rt http.RoundTripper) http.RoundTripper
+
+// Wrappers accepts any number of wrappers and returns a wrapper
+// function that is the equivalent of calling each of them in order. Nil
+// values are ignored, which makes this function convenient for incrementally
+// wrapping a function.
+func Wrappers(fns ...WrapperFunc) WrapperFunc {
+	if len(fns) == 0 {
+		return nil
+	}
+	// optimize the common case of wrapping a possibly nil transport wrapper
+	// with an additional wrapper
+	if len(fns) == 2 && fns[0] == nil {
+		return fns[1]
+	}
+	return func(rt http.RoundTripper) http.RoundTripper {
+		base := rt
+		for _, fn := range fns {
+			if fn != nil {
+				base = fn(base)
+			}
+		}
+		return base
+	}
+}
+
+// ContextCanceller prevents new requests after the provided context is finished.
+// err is returned when the context is closed, allowing the caller to provide a context
+// appropriate error.
+func ContextCanceller(ctx context.Context, err error) WrapperFunc {
+	return func(rt http.RoundTripper) http.RoundTripper {
+		return &contextCanceller{
+			ctx: ctx,
+			rt:  rt,
+			err: err,
+		}
+	}
+}
+
+type contextCanceller struct {
+	ctx context.Context
+	rt  http.RoundTripper
+	err error
+}
+
+func (b *contextCanceller) RoundTrip(req *http.Request) (*http.Response, error) {
+	select {
+	case <-b.ctx.Done():
+		return nil, b.err
+	default:
+		return b.rt.RoundTrip(req)
+	}
+}
+
+func tryCancelRequest(rt http.RoundTripper, req *http.Request) {
+	type canceler interface {
+		CancelRequest(*http.Request)
+	}
+	switch rt := rt.(type) {
+	case canceler:
+		rt.CancelRequest(req)
+	case utilnet.RoundTripperWrapper:
+		tryCancelRequest(rt.WrappedRoundTripper(), req)
+	default:
+		klog.Warningf("Unable to cancel request for %T", rt)
+	}
+}
+
+type certificateCacheEntry struct {
+	cert  *tls.Certificate
+	err   error
+	birth time.Time
+}
+
+// isStale returns true when this cache entry is too old to be usable
+func (c *certificateCacheEntry) isStale() bool {
+	return time.Since(c.birth) > time.Second
+}
+
+func newCertificateCacheEntry(certFile, keyFile string) certificateCacheEntry {
+	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
+	return certificateCacheEntry{cert: &cert, err: err, birth: time.Now()}
+}
+
+// cachingCertificateLoader ensures that we don't hammer the filesystem when opening many connections
+// the underlying cert files are read at most once every second
+func cachingCertificateLoader(certFile, keyFile string) func() (*tls.Certificate, error) {
+	current := newCertificateCacheEntry(certFile, keyFile)
+	var currentMtx sync.RWMutex
+
+	return func() (*tls.Certificate, error) {
+		currentMtx.RLock()
+		if current.isStale() {
+			currentMtx.RUnlock()
+
+			currentMtx.Lock()
+			defer currentMtx.Unlock()
+
+			if current.isStale() {
+				current = newCertificateCacheEntry(certFile, keyFile)
+			}
+		} else {
+			defer currentMtx.RUnlock()
+		}
+
+		return current.cert, current.err
+	}
+}

e2e/vendor/k8s.io/client-go/transport/websocket/roundtripper.go

@@ -0,0 +1,224 @@
+/*
+Copyright 2023 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 websocket
+
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+
+	gwebsocket "github.com/gorilla/websocket"
+
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/serializer"
+	"k8s.io/apimachinery/pkg/util/httpstream"
+	"k8s.io/apimachinery/pkg/util/httpstream/wsstream"
+	utilnet "k8s.io/apimachinery/pkg/util/net"
+	restclient "k8s.io/client-go/rest"
+	"k8s.io/client-go/transport"
+)
+
+var (
+	_ utilnet.TLSClientConfigHolder = &RoundTripper{}
+	_ http.RoundTripper             = &RoundTripper{}
+)
+
+var (
+	statusScheme = runtime.NewScheme()
+	statusCodecs = serializer.NewCodecFactory(statusScheme)
+)
+
+func init() {
+	statusScheme.AddUnversionedTypes(metav1.SchemeGroupVersion,
+		&metav1.Status{},
+	)
+}
+
+// ConnectionHolder defines functions for structure providing
+// access to the websocket connection.
+type ConnectionHolder interface {
+	DataBufferSize() int
+	Connection() *gwebsocket.Conn
+}
+
+// RoundTripper knows how to establish a connection to a remote WebSocket endpoint and make it available for use.
+// RoundTripper must not be reused.
+type RoundTripper struct {
+	// TLSConfig holds the TLS configuration settings to use when connecting
+	// to the remote server.
+	TLSConfig *tls.Config
+
+	// Proxier specifies a function to return a proxy for a given
+	// Request. If the function returns a non-nil error, the
+	// request is aborted with the provided error.
+	// If Proxy is nil or returns a nil *URL, no proxy is used.
+	Proxier func(req *http.Request) (*url.URL, error)
+
+	// Conn holds the WebSocket connection after a round trip.
+	Conn *gwebsocket.Conn
+}
+
+// Connection returns the stored websocket connection.
+func (rt *RoundTripper) Connection() *gwebsocket.Conn {
+	return rt.Conn
+}
+
+// DataBufferSize returns the size of buffers for the
+// websocket connection.
+func (rt *RoundTripper) DataBufferSize() int {
+	return 32 * 1024
+}
+
+// TLSClientConfig implements pkg/util/net.TLSClientConfigHolder.
+func (rt *RoundTripper) TLSClientConfig() *tls.Config {
+	return rt.TLSConfig
+}
+
+// RoundTrip connects to the remote websocket using the headers in the request and the TLS
+// configuration from the config
+func (rt *RoundTripper) RoundTrip(request *http.Request) (retResp *http.Response, retErr error) {
+	defer func() {
+		if request.Body != nil {
+			err := request.Body.Close()
+			if retErr == nil {
+				retErr = err
+			}
+		}
+	}()
+
+	// set the protocol version directly on the dialer from the header
+	protocolVersions := request.Header[wsstream.WebSocketProtocolHeader]
+	delete(request.Header, wsstream.WebSocketProtocolHeader)
+
+	dialer := gwebsocket.Dialer{
+		Proxy:           rt.Proxier,
+		TLSClientConfig: rt.TLSConfig,
+		Subprotocols:    protocolVersions,
+		ReadBufferSize:  rt.DataBufferSize() + 1024, // add space for the protocol byte indicating which channel the data is for
+		WriteBufferSize: rt.DataBufferSize() + 1024, // add space for the protocol byte indicating which channel the data is for
+	}
+	switch request.URL.Scheme {
+	case "https":
+		request.URL.Scheme = "wss"
+	case "http":
+		request.URL.Scheme = "ws"
+	default:
+		return nil, fmt.Errorf("unknown url scheme: %s", request.URL.Scheme)
+	}
+	wsConn, resp, err := dialer.DialContext(request.Context(), request.URL.String(), request.Header)
+	if err != nil {
+		// BadHandshake error becomes an "UpgradeFailureError" (used for streaming fallback).
+		if errors.Is(err, gwebsocket.ErrBadHandshake) {
+			cause := err
+			// Enhance the error message with the error response if possible.
+			if resp != nil && len(resp.Status) > 0 {
+				defer resp.Body.Close()                         //nolint:errcheck
+				cause = fmt.Errorf("%w (%s)", err, resp.Status) // Always add the response status
+				responseError := ""
+				responseErrorBytes, readErr := io.ReadAll(io.LimitReader(resp.Body, 64*1024))
+				if readErr != nil {
+					cause = fmt.Errorf("%w: unable to read error from server response", cause)
+				} else {
+					// If returned error can be decoded as "metav1.Status", return a "StatusError".
+					responseError = strings.TrimSpace(string(responseErrorBytes))
+					if len(responseError) > 0 {
+						if obj, _, decodeErr := statusCodecs.UniversalDecoder().Decode(responseErrorBytes, nil, &metav1.Status{}); decodeErr == nil {
+							if status, ok := obj.(*metav1.Status); ok {
+								cause = &apierrors.StatusError{ErrStatus: *status}
+							}
+						} else {
+							// Otherwise, append the responseError string.
+							cause = fmt.Errorf("%w: %s", cause, responseError)
+						}
+					}
+				}
+			}
+			return nil, &httpstream.UpgradeFailureError{Cause: cause}
+		}
+		return nil, err
+	}
+
+	// Ensure we got back a protocol we understand
+	foundProtocol := false
+	for _, protocolVersion := range protocolVersions {
+		if protocolVersion == wsConn.Subprotocol() {
+			foundProtocol = true
+			break
+		}
+	}
+	if !foundProtocol {
+		wsConn.Close() // nolint:errcheck
+		return nil, &httpstream.UpgradeFailureError{Cause: fmt.Errorf("invalid protocol, expected one of %q, got %q", protocolVersions, wsConn.Subprotocol())}
+	}
+
+	rt.Conn = wsConn
+
+	return resp, nil
+}
+
+// RoundTripperFor transforms the passed rest config into a wrapped roundtripper, as well
+// as a pointer to the websocket RoundTripper. The websocket RoundTripper contains the
+// websocket connection after RoundTrip() on the wrapper. Returns an error if there is
+// a problem creating the round trippers.
+func RoundTripperFor(config *restclient.Config) (http.RoundTripper, ConnectionHolder, error) {
+	transportCfg, err := config.TransportConfig()
+	if err != nil {
+		return nil, nil, err
+	}
+	tlsConfig, err := transport.TLSConfigFor(transportCfg)
+	if err != nil {
+		return nil, nil, err
+	}
+	proxy := config.Proxy
+	if proxy == nil {
+		proxy = utilnet.NewProxierWithNoProxyCIDR(http.ProxyFromEnvironment)
+	}
+
+	upgradeRoundTripper := &RoundTripper{
+		TLSConfig: tlsConfig,
+		Proxier:   proxy,
+	}
+	wrapper, err := transport.HTTPWrappersForConfig(transportCfg, upgradeRoundTripper)
+	if err != nil {
+		return nil, nil, err
+	}
+	return wrapper, upgradeRoundTripper, nil
+}
+
+// Negotiate opens a connection to a remote server and attempts to negotiate
+// a WebSocket connection. Upon success, it returns the negotiated connection.
+// The round tripper rt must use the WebSocket round tripper wsRt - see RoundTripperFor.
+func Negotiate(rt http.RoundTripper, connectionInfo ConnectionHolder, req *http.Request, protocols ...string) (*gwebsocket.Conn, error) {
+	// Plumb protocols to RoundTripper#RoundTrip
+	req.Header[wsstream.WebSocketProtocolHeader] = protocols
+	resp, err := rt.RoundTrip(req)
+	if err != nil {
+		return nil, err
+	}
+	err = resp.Body.Close()
+	if err != nil {
+		connectionInfo.Connection().Close()
+		return nil, fmt.Errorf("error closing response body: %v", err)
+	}
+	return connectionInfo.Connection(), nil
+}