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Merge pull request #873 from enj/enj/i/strict_tls

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Force the use of secure TLS config
This commit is contained in:
Mo Khan 2021-11-17 19:17:13 -05:00 committed by GitHub
commit 6a68c6532c
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GPG Key ID: 4AEE18F83AFDEB23
48 changed files with 2431 additions and 317 deletions
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3
CONTRIBUTING.md
View File

@ -114,11 +114,12 @@ docker build .
- [`kind`](https://kind.sigs.k8s.io/docs/user/quick-start)
- [`kubectl`](https://kubernetes.io/docs/tasks/tools/install-kubectl/)
- [`ytt`](https://carvel.dev/#getting-started)
- [`nmap`](https://nmap.org/download.html)
On macOS, these tools can be installed with [Homebrew](https://brew.sh/) (assuming you have Chrome installed already):
```bash
brew install kind k14s/tap/ytt k14s/tap/kapp kubectl chromedriver && brew cask install docker
brew install kind k14s/tap/ytt k14s/tap/kapp kubectl chromedriver nmap && brew cask install docker
```
1. Create a kind cluster, compile, create container images, and install Pinniped and supporting dependencies using:

31
cmd/pinniped/cmd/kubeconfig.go
View File

@ -5,7 +5,6 @@ package cmd
import (
"context"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"encoding/json"
@ -28,13 +27,13 @@ import (
_ "k8s.io/client-go/plugin/pkg/client/auth" // Adds handlers for various dynamic auth plugins in client-go
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
"k8s.io/client-go/transport"
conciergev1alpha1 "go.pinniped.dev/generated/latest/apis/concierge/authentication/v1alpha1"
configv1alpha1 "go.pinniped.dev/generated/latest/apis/concierge/config/v1alpha1"
idpdiscoveryv1alpha1 "go.pinniped.dev/generated/latest/apis/supervisor/idpdiscovery/v1alpha1"
conciergeclientset "go.pinniped.dev/generated/latest/client/concierge/clientset/versioned"
"go.pinniped.dev/internal/groupsuffix"
"go.pinniped.dev/internal/net/phttp"
)
type kubeconfigDeps struct {
@ -664,17 +663,8 @@ func validateKubeconfig(ctx context.Context, flags getKubeconfigParams, kubeconf
return fmt.Errorf("invalid kubeconfig (no certificateAuthorityData)")
}
httpClient := &http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
MinVersion: tls.VersionTLS12,
RootCAs: kubeconfigCA,
},
Proxy: http.ProxyFromEnvironment,
TLSHandshakeTimeout: 10 * time.Second,
},
Timeout: 10 * time.Second,
}
httpClient := phttp.Default(kubeconfigCA)
httpClient.Timeout = 10 * time.Second
ticker := time.NewTicker(2 * time.Second)
defer ticker.Stop()
@ -781,21 +771,14 @@ func discoverSupervisorUpstreamIDP(ctx context.Context, flags *getKubeconfigPara
}
func newDiscoveryHTTPClient(caBundleFlag caBundleFlag) (*http.Client, error) {
t := &http.Transport{
TLSClientConfig: &tls.Config{MinVersion: tls.VersionTLS12},
Proxy: http.ProxyFromEnvironment,
}
httpClient := &http.Client{Transport: t}
var rootCAs *x509.CertPool
if caBundleFlag != nil {
rootCAs := x509.NewCertPool()
ok := rootCAs.AppendCertsFromPEM(caBundleFlag)
if !ok {
rootCAs = x509.NewCertPool()
if ok := rootCAs.AppendCertsFromPEM(caBundleFlag); !ok {
return nil, fmt.Errorf("unable to fetch OIDC discovery data from issuer: could not parse CA bundle")
}
t.TLSClientConfig.RootCAs = rootCAs
}
httpClient.Transport = transport.DebugWrappers(httpClient.Transport)
return httpClient, nil
return phttp.Default(rootCAs), nil
}
func discoverIDPsDiscoveryEndpointURL(ctx context.Context, issuer string, httpClient *http.Client) (string, error) {

20
cmd/pinniped/cmd/login_oidc.go
View File

@ -5,7 +5,6 @@ package cmd
import (
"context"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"encoding/json"
@ -21,12 +20,12 @@ import (
"github.com/spf13/cobra"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clientauthv1beta1 "k8s.io/client-go/pkg/apis/clientauthentication/v1beta1"
"k8s.io/client-go/transport"
"k8s.io/klog/v2/klogr"
idpdiscoveryv1alpha1 "go.pinniped.dev/generated/latest/apis/supervisor/idpdiscovery/v1alpha1"
"go.pinniped.dev/internal/execcredcache"
"go.pinniped.dev/internal/groupsuffix"
"go.pinniped.dev/internal/net/phttp"
"go.pinniped.dev/internal/plog"
"go.pinniped.dev/pkg/conciergeclient"
"go.pinniped.dev/pkg/oidcclient"
@ -308,18 +307,7 @@ func makeClient(caBundlePaths []string, caBundleData []string) (*http.Client, er
}
pool.AppendCertsFromPEM(pem)
}
client := &http.Client{
Transport: &http.Transport{
Proxy: http.ProxyFromEnvironment,
TLSClientConfig: &tls.Config{
RootCAs: pool,
MinVersion: tls.VersionTLS12,
},
},
}
client.Transport = transport.DebugWrappers(client.Transport)
return client, nil
return phttp.Default(pool), nil
}
func tokenCredential(token *oidctypes.Token) *clientauthv1beta1.ExecCredential {
@ -338,7 +326,7 @@ func tokenCredential(token *oidctypes.Token) *clientauthv1beta1.ExecCredential {
return &cred
}
func SetLogLevel(lookupEnv func(string) (string, bool)) (*plog.PLogger, error) {
func SetLogLevel(lookupEnv func(string) (string, bool)) (plog.Logger, error) {
debug, _ := lookupEnv("PINNIPED_DEBUG")
if debug == "true" {
err := plog.ValidateAndSetLogLevelGlobally(plog.LevelDebug)
@ -347,7 +335,7 @@ func SetLogLevel(lookupEnv func(string) (string, bool)) (*plog.PLogger, error) {
}
}
logger := plog.New("Pinniped login: ")
return &logger, nil
return logger, nil
}
// mustGetConfigDir returns a directory that follows the XDG base directory convention:

7
hack/prepare-for-integration-tests.sh
View File

@ -132,6 +132,7 @@ check_dependency kubectl "Please install kubectl. e.g. 'brew install kubectl' fo
check_dependency htpasswd "Please install htpasswd. Should be pre-installed on MacOS. Usually found in 'apache2-utils' package for linux."
check_dependency openssl "Please install openssl. Should be pre-installed on MacOS."
check_dependency chromedriver "Please install chromedriver. e.g. 'brew install chromedriver' for MacOS"
check_dependency nmap "Please install nmap. e.g. 'brew install nmap' for MacOS"
# Check that Chrome and chromedriver versions match. If chromedriver falls a couple versions behind
# then usually tests start to fail with strange error messages.
@ -158,6 +159,12 @@ if [ "$(kubectl version --client=true --short | cut -d '.' -f 2)" -lt 18 ]; then
exit 1
fi
# Require nmap >= 7.92.x
if [ "$(nmap -V | grep 'Nmap version' | cut -d ' ' -f 3 | cut -d '.' -f 2)" -lt 92 ]; then
log_error "nmap >= 7.92.x is required, you have $(nmap -V | grep 'Nmap version' | cut -d ' ' -f 3)"
exit 1
fi
if [[ "$clean_kind" == "yes" ]]; then
log_note "Deleting running kind cluster to prepare from a clean slate..."
./hack/kind-down.sh

88
internal/concierge/impersonator/impersonator.go
View File

@ -7,6 +7,7 @@ import (
"context"
"encoding/json"
"fmt"
"io"
"net"
"net/http"
"net/http/httputil"
@ -14,6 +15,7 @@ import (
"os"
"regexp"
"strings"
"sync"
"time"
authenticationv1 "k8s.io/api/authentication/v1"
@ -47,6 +49,7 @@ import (
"k8s.io/client-go/transport"
"go.pinniped.dev/internal/constable"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/dynamiccert"
"go.pinniped.dev/internal/httputil/securityheader"
"go.pinniped.dev/internal/kubeclient"
@ -70,13 +73,14 @@ func New(
dynamicCertProvider dynamiccert.Private,
impersonationProxySignerCA dynamiccert.Public,
) (func(stopCh <-chan struct{}) error, error) {
return newInternal(port, dynamicCertProvider, impersonationProxySignerCA, nil, nil, nil)
return newInternal(port, dynamicCertProvider, impersonationProxySignerCA, kubeclient.Secure, nil, nil, nil)
}
func newInternal( //nolint:funlen // yeah, it's kind of long.
port int,
dynamicCertProvider dynamiccert.Private,
impersonationProxySignerCA dynamiccert.Public,
restConfigFunc ptls.RestConfigFunc, // for unit testing, should always be kubeclient.Secure in production
clientOpts []kubeclient.Option, // for unit testing, should always be nil in production
recOpts func(*genericoptions.RecommendedOptions), // for unit testing, should always be nil in production
recConfig func(*genericapiserver.RecommendedConfig), // for unit testing, should always be nil in production
@ -100,6 +104,13 @@ func newInternal( //nolint:funlen // yeah, it's kind of long.
recommendedOptions.SecureServing.ServerCert.GeneratedCert = dynamicCertProvider // serving certs (end user facing)
recommendedOptions.SecureServing.BindPort = port
// secure TLS for connections coming from external clients and going to the Kube API server
// this is best effort because not all options provide the right hooks to override TLS config
// since any client could connect to the impersonation proxy, this uses the default TLS config
if err := ptls.DefaultRecommendedOptions(recommendedOptions, restConfigFunc); err != nil {
return nil, fmt.Errorf("failed to secure recommended options: %w", err)
}
// Wire up the impersonation proxy signer CA as another valid authenticator for client cert auth,
// along with the Kube API server's CA.
// Note: any changes to the Authentication stack need to be kept in sync with any assumptions made
@ -258,7 +269,7 @@ func newInternal( //nolint:funlen // yeah, it's kind of long.
delegatingAuthorizer := serverConfig.Authorization.Authorizer
customReasonAuthorizer := &comparableAuthorizer{
authorizerFunc: func(ctx context.Context, a authorizer.Attributes) (authorizer.Decision, string, error) {
AuthorizerFunc: func(ctx context.Context, a authorizer.Attributes) (authorizer.Decision, string, error) {
const baseReason = "decision made by impersonation-proxy.concierge.pinniped.dev"
switch a.GetVerb() {
case "":
@ -347,14 +358,14 @@ func getReverseProxyClient(clientOpts []kubeclient.Option) (*kubeclient.Client,
if err != nil {
return nil, err
}
impersonationProxyRestConfig = rest.AnonymousClientConfig(impersonationProxyRestConfig)
impersonationProxyRestConfig = kubeclient.SecureAnonymousClientConfig(impersonationProxyRestConfig)
impersonationProxyRestConfig.BearerTokenFile = tokenFile
return kubeclient.New(kubeclient.WithConfig(impersonationProxyRestConfig))
}
func isAnonymousAuthEnabled(config *rest.Config) (bool, error) {
anonymousConfig := rest.AnonymousClientConfig(config)
anonymousConfig := kubeclient.SecureAnonymousClientConfig(config)
// we do not need either of these but RESTClientFor complains if they are not set
anonymousConfig.GroupVersion = &schema.GroupVersion{}
@ -413,14 +424,7 @@ type comparableAuthenticator struct {
// No-op wrapping around AuthorizerFunc to allow for comparisons.
type comparableAuthorizer struct {
authorizerFunc
}
// TODO: delete when we pick up https://github.com/kubernetes/kubernetes/pull/100963
type authorizerFunc func(ctx context.Context, a authorizer.Attributes) (authorizer.Decision, string, error)
func (f authorizerFunc) Authorize(ctx context.Context, a authorizer.Attributes) (authorizer.Decision, string, error) {
return f(ctx, a)
authorizer.AuthorizerFunc
}
func withBearerTokenPreservation(delegate http.Handler) http.Handler {
@ -462,16 +466,16 @@ func newImpersonationReverseProxyFunc(restConfig *rest.Config) (func(*genericapi
if err != nil {
return nil, fmt.Errorf("could not get http/1.1 round tripper: %w", err)
}
http1RoundTripperAnonymous, err := getTransportForProtocol(rest.AnonymousClientConfig(restConfig), "http/1.1")
http1RoundTripperAnonymous, err := getTransportForProtocol(kubeclient.SecureAnonymousClientConfig(restConfig), "http/1.1")
if err != nil {
return nil, fmt.Errorf("could not get http/1.1 anonymous round tripper: %w", err)
}
http2RoundTripper, err := getTransportForProtocol(restConfig, "h2")
http2RoundTripper, err := getTransportForProtocol(restConfig, "h2") // TODO figure out why this leads to still supporting http1
if err != nil {
return nil, fmt.Errorf("could not get http/2.0 round tripper: %w", err)
}
http2RoundTripperAnonymous, err := getTransportForProtocol(rest.AnonymousClientConfig(restConfig), "h2")
http2RoundTripperAnonymous, err := getTransportForProtocol(kubeclient.SecureAnonymousClientConfig(restConfig), "h2")
if err != nil {
return nil, fmt.Errorf("could not get http/2.0 anonymous round tripper: %w", err)
}
@ -565,6 +569,12 @@ func newImpersonationReverseProxyFunc(restConfig *rest.Config) (func(*genericapi
r.Header.Del("X-Forwarded-For")
}
// the http2 code seems to call Close concurrently which can lead to data races
if r.Body != nil {
r = utilnet.CloneRequest(r)
r.Body = &safeReadWriteCloser{rc: r.Body}
}
reverseProxy := httputil.NewSingleHostReverseProxy(serverURL)
reverseProxy.Transport = rt
reverseProxy.FlushInterval = 200 * time.Millisecond // the "watch" verb will not work without this line
@ -573,6 +583,43 @@ func newImpersonationReverseProxyFunc(restConfig *rest.Config) (func(*genericapi
}, nil
}
var _ io.ReadWriteCloser = &safeReadWriteCloser{}
type safeReadWriteCloser struct {
m sync.Mutex // all methods allowed concurrently, this only guards concurrent calls to Close
rc io.ReadCloser
once sync.Once // set up rwc and writeErr
rwc io.ReadWriteCloser
writeErr error
}
func (r *safeReadWriteCloser) Read(p []byte) (int, error) {
return r.rc.Read(p)
}
func (r *safeReadWriteCloser) Write(p []byte) (int, error) {
r.once.Do(func() {
var ok bool
r.rwc, ok = r.rc.(io.ReadWriteCloser)
if !ok { // this method should only be caused during flows that switch protocols
r.writeErr = fmt.Errorf("switching protocols failed: io.ReadCloser %T is not io.ReadWriteCloser", r.rc)
}
})
if r.writeErr != nil {
return 0, r.writeErr
}
return r.rwc.Write(p)
}
func (r *safeReadWriteCloser) Close() error {
r.m.Lock()
defer r.m.Unlock()
return r.rc.Close()
}
func ensureNoImpersonationHeaders(r *http.Request) error {
for key := range r.Header {
// even though we have unit tests that try to cover this case, it is hard to tell if Go does
@ -759,5 +806,14 @@ func getTransportForProtocol(restConfig *rest.Config, protocol string) (http.Rou
}
transportConfig.TLS.NextProtos = []string{protocol}
return transport.New(transportConfig)
rt, err := transport.New(transportConfig)
if err != nil {
return nil, fmt.Errorf("could not build transport: %w", err)
}
if err := kubeclient.AssertSecureTransport(rt); err != nil {
return nil, err // make sure we only use a secure TLS config
}
return rt, nil
}

70
internal/concierge/impersonator/impersonator_test.go
View File

@ -36,6 +36,7 @@ import (
genericapiserver "k8s.io/apiserver/pkg/server"
genericoptions "k8s.io/apiserver/pkg/server/options"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd/api"
featuregatetesting "k8s.io/component-base/featuregate/testing"
@ -44,12 +45,13 @@ import (
loginv1alpha1 "go.pinniped.dev/generated/latest/apis/concierge/login/v1alpha1"
"go.pinniped.dev/internal/certauthority"
"go.pinniped.dev/internal/constable"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/dynamiccert"
"go.pinniped.dev/internal/groupsuffix"
"go.pinniped.dev/internal/here"
"go.pinniped.dev/internal/httputil/roundtripper"
"go.pinniped.dev/internal/kubeclient"
"go.pinniped.dev/internal/testutil"
"go.pinniped.dev/internal/testutil/tlsserver"
)
func TestImpersonator(t *testing.T) {
@ -697,7 +699,9 @@ func TestImpersonator(t *testing.T) {
// will proxy incoming calls to this fake server.
testKubeAPIServerWasCalled := false
var testKubeAPIServerSawHeaders http.Header
testKubeAPIServerCA, testKubeAPIServerURL := testutil.TLSTestServer(t, func(w http.ResponseWriter, r *http.Request) {
testKubeAPIServer := tlsserver.TLSTestServer(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
tlsserver.AssertTLS(t, r, ptls.Secure)
switch r.URL.Path {
case "/api/v1/namespaces/kube-system/configmaps":
require.Equal(t, http.MethodGet, r.Method)
@ -708,6 +712,13 @@ func TestImpersonator(t *testing.T) {
http.NotFound(w, r)
return
case "/apis/flowcontrol.apiserver.k8s.io/v1beta1/prioritylevelconfigurations",
"/apis/flowcontrol.apiserver.k8s.io/v1beta1/flowschemas":
// ignore requests related to priority and fairness logic
require.Equal(t, http.MethodGet, r.Method)
http.NotFound(w, r)
return
case "/api/v1/namespaces":
require.Equal(t, http.MethodGet, r.Method)
@ -785,13 +796,13 @@ func TestImpersonator(t *testing.T) {
require.Fail(t, "fake Kube API server got an unexpected request", "path: %s", r.URL.Path)
return
}
})
}), tlsserver.RecordTLSHello)
// Create the client config that the impersonation server should use to talk to the Kube API server.
testKubeAPIServerKubeconfig := rest.Config{
Host: testKubeAPIServerURL,
Host: testKubeAPIServer.URL,
BearerToken: "some-service-account-token",
TLSClientConfig: rest.TLSClientConfig{CAData: []byte(testKubeAPIServerCA)},
TLSClientConfig: rest.TLSClientConfig{CAData: tlsserver.TLSTestServerCA(testKubeAPIServer)},
BearerTokenFile: tt.kubeAPIServerClientBearerTokenFile,
}
clientOpts := []kubeclient.Option{kubeclient.WithConfig(&testKubeAPIServerKubeconfig)}
@ -800,7 +811,6 @@ func TestImpersonator(t *testing.T) {
recOpts := func(options *genericoptions.RecommendedOptions) {
options.Authentication.RemoteKubeConfigFileOptional = true
options.Authorization.RemoteKubeConfigFileOptional = true
options.CoreAPI = nil
options.Admission = nil
options.SecureServing.Listener = listener // use our listener with the dynamic port
}
@ -814,8 +824,8 @@ func TestImpersonator(t *testing.T) {
// Allow standard REST verbs to be authorized so that tests pass without invasive changes
recConfig := func(config *genericapiserver.RecommendedConfig) {
authz := config.Authorization.Authorizer.(*comparableAuthorizer)
delegate := authz.authorizerFunc
authz.authorizerFunc = func(ctx context.Context, a authorizer.Attributes) (authorizer.Decision, string, error) {
delegate := authz.AuthorizerFunc
authz.AuthorizerFunc = func(ctx context.Context, a authorizer.Attributes) (authorizer.Decision, string, error) {
recorder.record(a)
switch a.GetVerb() {
case "create", "get", "list":
@ -826,8 +836,15 @@ func TestImpersonator(t *testing.T) {
}
}
restConfigFunc := func(config *rest.Config) (kubernetes.Interface, *rest.Config, error) {
if config == nil {
config = &testKubeAPIServerKubeconfig
}
return kubeclient.Secure(config)
}
// Create an impersonator. Use an invalid port number to make sure our listener override works.
runner, constructionErr := newInternal(-1000, certKeyContent, caContent, clientOpts, recOpts, recConfig)
runner, constructionErr := newInternal(-1000, certKeyContent, caContent, restConfigFunc, clientOpts, recOpts, recConfig)
if len(tt.wantConstructionError) > 0 {
require.EqualError(t, constructionErr, tt.wantConstructionError)
require.Nil(t, runner)
@ -864,7 +881,7 @@ func TestImpersonator(t *testing.T) {
return rt
}
return roundtripper.Func(func(req *http.Request) (*http.Response, error) {
return roundtripper.WrapFunc(rt, func(req *http.Request) (*http.Response, error) {
req = req.Clone(req.Context())
tt.clientMutateHeaders(req.Header)
return rt.RoundTrip(req)
@ -928,10 +945,10 @@ func TestImpersonator(t *testing.T) {
// anonymous TCR should always work
tcrRegGroup, err := kubeclient.New(kubeclient.WithConfig(rest.AnonymousClientConfig(clientKubeconfig)))
tcrRegGroup, err := kubeclient.New(kubeclient.WithConfig(kubeclient.SecureAnonymousClientConfig(clientKubeconfig)))
require.NoError(t, err)
tcrOtherGroup, err := kubeclient.New(kubeclient.WithConfig(rest.AnonymousClientConfig(clientKubeconfig)),
tcrOtherGroup, err := kubeclient.New(kubeclient.WithConfig(kubeclient.SecureAnonymousClientConfig(clientKubeconfig)),
kubeclient.WithMiddleware(groupsuffix.New("walrus.tld")))
require.NoError(t, err)
@ -950,7 +967,7 @@ func TestImpersonator(t *testing.T) {
// these calls should only work when anonymous auth is enabled
anonymousConfig := rest.AnonymousClientConfig(clientKubeconfig)
anonymousConfig := kubeclient.SecureAnonymousClientConfig(clientKubeconfig)
anonymousConfig.GroupVersion = &schema.GroupVersion{
Group: "not-concierge.walrus.tld",
Version: "v1",
@ -989,7 +1006,7 @@ func TestImpersonator(t *testing.T) {
// this should always fail as unauthorized (even for TCR) because the cert is not valid
badCertConfig := rest.AnonymousClientConfig(clientKubeconfig)
badCertConfig := kubeclient.SecureAnonymousClientConfig(clientKubeconfig)
badCert := newClientCert(t, unrelatedCA, "bad-user", []string{"bad-group"})
badCertConfig.TLSClientConfig.CertData = badCert.certPEM
badCertConfig.TLSClientConfig.KeyData = badCert.keyPEM
@ -1041,7 +1058,7 @@ func TestImpersonatorHTTPHandler(t *testing.T) {
ExecProvider: &api.ExecConfig{},
AuthProvider: &api.AuthProviderConfig{},
},
wantCreationErr: "could not get http/1.1 round tripper: could not get in-cluster transport config: execProvider and authProvider cannot be used in combination",
wantCreationErr: "could not create secure client config: execProvider and authProvider cannot be used in combination",
},
{
name: "fail to get transport from config",
@ -1051,7 +1068,7 @@ func TestImpersonatorHTTPHandler(t *testing.T) {
Transport: http.DefaultTransport,
TLSClientConfig: rest.TLSClientConfig{Insecure: true},
},
wantCreationErr: "could not get http/1.1 round tripper: using a custom transport with TLS certificate options or the insecure flag is not allowed",
wantCreationErr: "could not create secure client config: failed to build transport: using a custom transport with TLS certificate options or the insecure flag is not allowed",
},
{
name: "Impersonate-User header already in request",
@ -1761,7 +1778,9 @@ func TestImpersonatorHTTPHandler(t *testing.T) {
testKubeAPIServerWasCalled := false
testKubeAPIServerSawHeaders := http.Header{}
testKubeAPIServerCA, testKubeAPIServerURL := testutil.TLSTestServer(t, func(w http.ResponseWriter, r *http.Request) {
testKubeAPIServer := tlsserver.TLSTestServer(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
tlsserver.AssertTLS(t, r, ptls.Secure)
testKubeAPIServerWasCalled = true
testKubeAPIServerSawHeaders = r.Header
if tt.kubeAPIServerStatusCode != http.StatusOK {
@ -1769,17 +1788,26 @@ func TestImpersonatorHTTPHandler(t *testing.T) {
} else {
_, _ = w.Write([]byte("successful proxied response"))
}
})
}), tlsserver.RecordTLSHello)
testKubeAPIServerKubeconfig := rest.Config{
Host: testKubeAPIServerURL,
Host: testKubeAPIServer.URL,
BearerToken: "some-service-account-token",
TLSClientConfig: rest.TLSClientConfig{CAData: []byte(testKubeAPIServerCA)},
TLSClientConfig: rest.TLSClientConfig{CAData: tlsserver.TLSTestServerCA(testKubeAPIServer)},
}
if tt.restConfig == nil {
tt.restConfig = &testKubeAPIServerKubeconfig
}
impersonatorHTTPHandlerFunc, err := newImpersonationReverseProxyFunc(tt.restConfig)
// mimic how newInternal would call newImpersonationReverseProxyFunc
impersonatorHTTPHandlerFunc, err := func() (func(*genericapiserver.Config) http.Handler, error) {
kubeClientForProxy, err := kubeclient.New(kubeclient.WithConfig(tt.restConfig))
if err != nil {
return nil, err
}
return newImpersonationReverseProxyFunc(rest.CopyConfig(kubeClientForProxy.ProtoConfig))
}()
if tt.wantCreationErr != "" {
require.EqualError(t, err, tt.wantCreationErr)
require.Nil(t, impersonatorHTTPHandlerFunc)

11
internal/concierge/server/server.go
View File

@ -29,10 +29,12 @@ import (
"go.pinniped.dev/internal/controller/authenticator/authncache"
"go.pinniped.dev/internal/controllerinit"
"go.pinniped.dev/internal/controllermanager"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/downward"
"go.pinniped.dev/internal/dynamiccert"
"go.pinniped.dev/internal/here"
"go.pinniped.dev/internal/issuer"
"go.pinniped.dev/internal/kubeclient"
"go.pinniped.dev/internal/plog"
"go.pinniped.dev/internal/registry/credentialrequest"
)
@ -209,6 +211,13 @@ func getAggregatedAPIServerConfig(
recommendedOptions.SecureServing.ServerCert.GeneratedCert = dynamicCertProvider
recommendedOptions.SecureServing.BindPort = 8443 // Don't run on default 443 because that requires root
// secure TLS for connections coming from and going to the Kube API server
// this is best effort because not all options provide the right hooks to override TLS config
// since our only client is the Kube API server, this uses the most secure TLS config
if err := ptls.SecureRecommendedOptions(recommendedOptions, kubeclient.Secure); err != nil {
return nil, fmt.Errorf("failed to secure recommended options: %w", err)
}
serverConfig := genericapiserver.NewRecommendedConfig(codecs)
// Note that among other things, this ApplyTo() function copies
// `recommendedOptions.SecureServing.ServerCert.GeneratedCert` into
@ -220,7 +229,7 @@ func getAggregatedAPIServerConfig(
// If the provider later starts returning certs, then the API server
// will use them to handle the incoming requests successfully.
if err := recommendedOptions.ApplyTo(serverConfig); err != nil {
return nil, err
return nil, fmt.Errorf("failed to apply recommended options: %w", err)
}
apiServerConfig := &apiserver.Config{

15
internal/controller/authenticator/authenticator.go
View File

@ -9,6 +9,8 @@ import (
"encoding/base64"
"fmt"
"k8s.io/client-go/util/cert"
auth1alpha1 "go.pinniped.dev/generated/latest/apis/concierge/authentication/v1alpha1"
)
@ -23,19 +25,20 @@ type Closer interface {
// CABundle returns a PEM-encoded CA bundle from the provided spec. If the provided spec is nil, a
// nil CA bundle will be returned. If the provided spec contains a CA bundle that is not properly
// encoded, an error will be returned.
func CABundle(spec *auth1alpha1.TLSSpec) ([]byte, error) {
func CABundle(spec *auth1alpha1.TLSSpec) (*x509.CertPool, []byte, error) {
if spec == nil || len(spec.CertificateAuthorityData) == 0 {
return nil, nil
return nil, nil, nil
}
pem, err := base64.StdEncoding.DecodeString(spec.CertificateAuthorityData)
if err != nil {
return nil, err
return nil, nil, err
}
if ok := x509.NewCertPool().AppendCertsFromPEM(pem); !ok {
return nil, fmt.Errorf("certificateAuthorityData is not valid PEM")
rootCAs, err := cert.NewPoolFromBytes(pem)
if err != nil {
return nil, nil, fmt.Errorf("certificateAuthorityData is not valid PEM: %w", err)
}
return pem, nil
return rootCAs, pem, nil
}

44
internal/controller/authenticator/jwtcachefiller/jwtcachefiller.go
View File

@ -6,9 +6,13 @@
package jwtcachefiller
import (
"context"
"fmt"
"net/url"
"reflect"
"time"
coreosoidc "github.com/coreos/go-oidc/v3/oidc"
"github.com/go-logr/logr"
"gopkg.in/square/go-jose.v2"
"k8s.io/apimachinery/pkg/api/errors"
@ -23,6 +27,7 @@ import (
pinnipedauthenticator "go.pinniped.dev/internal/controller/authenticator"
"go.pinniped.dev/internal/controller/authenticator/authncache"
"go.pinniped.dev/internal/controllerlib"
"go.pinniped.dev/internal/net/phttp"
)
// These default values come from the way that the Supervisor issues and signs tokens. We make these
@ -145,7 +150,7 @@ func (c *controller) extractValueAsJWTAuthenticator(value authncache.Value) *jwt
// newJWTAuthenticator creates a jwt authenticator from the provided spec.
func newJWTAuthenticator(spec *auth1alpha1.JWTAuthenticatorSpec) (*jwtAuthenticator, error) {
caBundle, err := pinnipedauthenticator.CABundle(spec.TLS)
rootCAs, caBundle, err := pinnipedauthenticator.CABundle(spec.TLS)
if err != nil {
return nil, fmt.Errorf("invalid TLS configuration: %w", err)
}
@ -167,20 +172,51 @@ func newJWTAuthenticator(spec *auth1alpha1.JWTAuthenticatorSpec) (*jwtAuthentica
groupsClaim = defaultGroupsClaim
}
authenticator, err := oidc.New(oidc.Options{
// copied from Kube OIDC code
issuerURL, err := url.Parse(spec.Issuer)
if err != nil {
return nil, err
}
if issuerURL.Scheme != "https" {
return nil, fmt.Errorf("issuer (%q) has invalid scheme (%q), require 'https'", spec.Issuer, issuerURL.Scheme)
}
client := phttp.Default(rootCAs)
client.Timeout = 30 * time.Second // copied from Kube OIDC code
ctx := coreosoidc.ClientContext(context.Background(), client)
provider, err := coreosoidc.NewProvider(ctx, spec.Issuer)
if err != nil {
return nil, fmt.Errorf("could not initialize provider: %w", err)
}
providerJSON := &struct {
JWKSURL string `json:"jwks_uri"`
}{}
if err := provider.Claims(providerJSON); err != nil {
return nil, fmt.Errorf("could not get provider jwks_uri: %w", err) // should be impossible because coreosoidc.NewProvider validates this
}
if len(providerJSON.JWKSURL) == 0 {
return nil, fmt.Errorf("issuer %q does not have jwks_uri set", spec.Issuer)
}
oidcAuthenticator, err := oidc.New(oidc.Options{
IssuerURL: spec.Issuer,
KeySet: coreosoidc.NewRemoteKeySet(ctx, providerJSON.JWKSURL),
ClientID: spec.Audience,
UsernameClaim: usernameClaim,
GroupsClaim: groupsClaim,
SupportedSigningAlgs: defaultSupportedSigningAlgos(),
CAContentProvider: caContentProvider,
// this is still needed for distributed claim resolution, meaning this uses a http client that does not honor our TLS config
// TODO fix when we pick up https://github.com/kubernetes/kubernetes/pull/106141
CAContentProvider: caContentProvider,
})
if err != nil {
return nil, fmt.Errorf("could not initialize authenticator: %w", err)
}
return &jwtAuthenticator{
tokenAuthenticatorCloser: authenticator,
tokenAuthenticatorCloser: oidcAuthenticator,
spec: spec,
}, nil
}

15
internal/controller/authenticator/jwtcachefiller/jwtcachefiller_test.go
View File

@ -15,7 +15,6 @@ import (
"encoding/pem"
"fmt"
"net/http"
"net/http/httptest"
"strings"
"testing"
"time"
@ -35,8 +34,10 @@ import (
pinnipedinformers "go.pinniped.dev/generated/latest/client/concierge/informers/externalversions"
"go.pinniped.dev/internal/controller/authenticator/authncache"
"go.pinniped.dev/internal/controllerlib"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/mocks/mocktokenauthenticatorcloser"
"go.pinniped.dev/internal/testutil/testlogger"
"go.pinniped.dev/internal/testutil/tlsserver"
)
func TestController(t *testing.T) {
@ -57,8 +58,10 @@ func TestController(t *testing.T) {
goodRSASigningAlgo := jose.RS256
mux := http.NewServeMux()
server := httptest.NewTLSServer(mux)
t.Cleanup(server.Close)
server := tlsserver.TLSTestServer(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
tlsserver.AssertTLS(t, r, ptls.Default)
mux.ServeHTTP(w, r)
}), tlsserver.RecordTLSHello)
mux.Handle("/.well-known/openid-configuration", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
@ -290,11 +293,7 @@ func TestController(t *testing.T) {
Spec: *missingTLSJWTAuthenticatorSpec,
},
},
wantLogs: []string{
`jwtcachefiller-controller "level"=0 "msg"="added new jwt authenticator" "issuer"="` + goodIssuer + `" "jwtAuthenticator"={"name":"test-name"}`,
},
wantCacheEntries: 1,
runTestsOnResultingAuthenticator: false, // skip the tests because the authenticator left in the cache doesn't have the CA for our test discovery server
wantErr: `failed to build jwt authenticator: could not initialize provider: Get "` + goodIssuer + `/.well-known/openid-configuration": x509: certificate signed by unknown authority`,
},
{
name: "invalid jwt authenticator CA",

4
internal/controller/authenticator/webhookcachefiller/webhookcachefiller.go
View File

@ -91,7 +91,7 @@ func newWebhookAuthenticator(
defer func() { _ = os.Remove(temp.Name()) }()
cluster := &clientcmdapi.Cluster{Server: spec.Endpoint}
cluster.CertificateAuthorityData, err = pinnipedauthenticator.CABundle(spec.TLS)
_, cluster.CertificateAuthorityData, err = pinnipedauthenticator.CABundle(spec.TLS)
if err != nil {
return nil, fmt.Errorf("invalid TLS configuration: %w", err)
}
@ -118,5 +118,7 @@ func newWebhookAuthenticator(
// custom proxy stuff used by the API server.
var customDial net.DialFunc
// this uses a http client that does not honor our TLS config
// TODO fix when we pick up https://github.com/kubernetes/kubernetes/pull/106155
return webhook.New(temp.Name(), version, implicitAuds, *webhook.DefaultRetryBackoff(), customDial)
}

2
internal/controller/authenticator/webhookcachefiller/webhookcachefiller_test.go
View File

@ -141,7 +141,7 @@ func TestNewWebhookAuthenticator(t *testing.T) {
TLS: &auth1alpha1.TLSSpec{CertificateAuthorityData: base64.StdEncoding.EncodeToString([]byte("bad data"))},
}, ioutil.TempFile, clientcmd.WriteToFile)
require.Nil(t, res)
require.EqualError(t, err, "invalid TLS configuration: certificateAuthorityData is not valid PEM")
require.EqualError(t, err, "invalid TLS configuration: certificateAuthorityData is not valid PEM: data does not contain any valid RSA or ECDSA certificates")
})
t.Run("valid config with no TLS spec", func(t *testing.T) {

2
internal/controller/kubecertagent/pod_command_executor.go
View File

@ -26,6 +26,8 @@ type kubeClientPodCommandExecutor struct {
// NewPodCommandExecutor returns a PodCommandExecutor that will interact with a pod via the provided
// kubeConfig and corresponding kubeClient.
func NewPodCommandExecutor(kubeConfig *restclient.Config, kubeClient kubernetes.Interface) PodCommandExecutor {
kubeConfig = restclient.CopyConfig(kubeConfig)
kubeConfig.NextProtos = []string{"http/1.1"} // we explicitly need to upgrade from http1 to spdy, exec cannot use http2
return &kubeClientPodCommandExecutor{kubeConfig: kubeConfig, kubeClient: kubeClient}
}

44
internal/controller/kubecertagent/pod_command_executor_test.go Normal file
View File

@ -0,0 +1,44 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package kubecertagent
import (
"net/http"
"testing"
"github.com/stretchr/testify/require"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/client-go/rest"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/kubeclient"
"go.pinniped.dev/internal/testutil/tlsserver"
)
func TestSecureTLS(t *testing.T) {
var sawRequest bool
server := tlsserver.TLSTestServer(t, http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
tlsserver.AssertTLS(t, r, ptls.Secure)
sawRequest = true
}), tlsserver.RecordTLSHello)
config := &rest.Config{
Host: server.URL,
TLSClientConfig: rest.TLSClientConfig{
CAData: tlsserver.TLSTestServerCA(server),
},
}
client, err := kubeclient.New(kubeclient.WithConfig(config))
require.NoError(t, err)
// build this exactly like our production could does
podCommandExecutor := NewPodCommandExecutor(client.JSONConfig, client.Kubernetes)
got, err := podCommandExecutor.Exec("podNamespace", "podName", "command", "arg1", "arg2")
require.Equal(t, &errors.StatusError{}, err)
require.Empty(t, got)
require.True(t, sawRequest)
}

33
internal/controller/supervisorconfig/oidcupstreamwatcher/oidc_upstream_watcher.go
View File

@ -6,7 +6,6 @@ package oidcupstreamwatcher
import (
"context"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"fmt"
@ -35,6 +34,7 @@ import (
"go.pinniped.dev/internal/controller/conditionsutil"
"go.pinniped.dev/internal/controller/supervisorconfig/upstreamwatchers"
"go.pinniped.dev/internal/controllerlib"
"go.pinniped.dev/internal/net/phttp"
"go.pinniped.dev/internal/oidc/provider"
"go.pinniped.dev/internal/upstreamoidc"
)
@ -313,7 +313,8 @@ func (c *oidcWatcherController) validateIssuer(ctx context.Context, upstream *v1
// If the provider does not exist in the cache, do a fresh discovery lookup and save to the cache.
if discoveredProvider == nil {
tlsConfig, err := getTLSConfig(upstream)
var err error
httpClient, err = getClient(upstream)
if err != nil {
return &v1alpha1.Condition{
Type: typeOIDCDiscoverySucceeded,
@ -323,14 +324,6 @@ func (c *oidcWatcherController) validateIssuer(ctx context.Context, upstream *v1
}
}
httpClient = &http.Client{
Timeout: time.Minute,
Transport: &http.Transport{
Proxy: http.ProxyFromEnvironment,
TLSClientConfig: tlsConfig,
},
}
discoveredProvider, err = oidc.NewProvider(oidc.ClientContext(ctx, httpClient), upstream.Spec.Issuer)
if err != nil {
const klogLevelTrace = 6
@ -406,13 +399,9 @@ func (c *oidcWatcherController) updateStatus(ctx context.Context, upstream *v1al
}
}
func getTLSConfig(upstream *v1alpha1.OIDCIdentityProvider) (*tls.Config, error) {
result := tls.Config{
MinVersion: tls.VersionTLS12,
}
func getClient(upstream *v1alpha1.OIDCIdentityProvider) (*http.Client, error) {
if upstream.Spec.TLS == nil || upstream.Spec.TLS.CertificateAuthorityData == "" {
return &result, nil
return defaultClientShortTimeout(nil), nil
}
bundle, err := base64.StdEncoding.DecodeString(upstream.Spec.TLS.CertificateAuthorityData)
@ -420,12 +409,18 @@ func getTLSConfig(upstream *v1alpha1.OIDCIdentityProvider) (*tls.Config, error)
return nil, fmt.Errorf("spec.certificateAuthorityData is invalid: %w", err)
}
result.RootCAs = x509.NewCertPool()
if !result.RootCAs.AppendCertsFromPEM(bundle) {
rootCAs := x509.NewCertPool()
if !rootCAs.AppendCertsFromPEM(bundle) {
return nil, fmt.Errorf("spec.certificateAuthorityData is invalid: %w", upstreamwatchers.ErrNoCertificates)
}
return &result, nil
return defaultClientShortTimeout(rootCAs), nil
}
func defaultClientShortTimeout(rootCAs *x509.CertPool) *http.Client {
c := phttp.Default(rootCAs)
c.Timeout = time.Minute
return c
}
func computeScopes(additionalScopes []string) []string {

20
internal/controller/supervisorconfig/oidcupstreamwatcher/oidc_upstream_watcher_test.go
View File

@ -19,6 +19,7 @@ import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/net"
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes/fake"
@ -1014,8 +1015,7 @@ oidc: issuer did not match the issuer returned by provider, expected "` + testIs
// We always want to use the proxy from env on these clients, so although the following assertions
// are a little hacky, this is a cheap way to test that we are using it.
actualTransport, ok := actualIDP.Client.Transport.(*http.Transport)
require.True(t, ok, "expected cached provider to have client with Transport of type *http.Transport")
actualTransport := unwrapTransport(t, actualIDP.Client.Transport)
httpProxyFromEnvFunction := reflect.ValueOf(http.ProxyFromEnvironment).Pointer()
actualTransportProxyFunction := reflect.ValueOf(actualTransport.Proxy).Pointer()
require.Equal(t, httpProxyFromEnvFunction, actualTransportProxyFunction,
@ -1041,6 +1041,22 @@ oidc: issuer did not match the issuer returned by provider, expected "` + testIs
}
}
func unwrapTransport(t *testing.T, rt http.RoundTripper) *http.Transport {
t.Helper()
switch baseRT := rt.(type) {
case *http.Transport:
return baseRT
case net.RoundTripperWrapper:
return unwrapTransport(t, baseRT.WrappedRoundTripper())
default:
t.Fatalf("expected cached provider to have client with Transport of type *http.Transport, got: %T", baseRT)
return nil // unreachable
}
}
func normalizeOIDCUpstreams(upstreams []v1alpha1.OIDCIdentityProvider, now metav1.Time) []v1alpha1.OIDCIdentityProvider {
result := make([]v1alpha1.OIDCIdentityProvider, 0, len(upstreams))
for _, u := range upstreams {

15
internal/crypto/ptls/old.go Normal file
View File

@ -0,0 +1,15 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
//go:build !go1.17
// +build !go1.17
package ptls
func init() {
// cause compile time failure if an older version of Go is used
`Pinniped's TLS configuration makes assumptions about how the Go standard library implementation of TLS works.
It particular, we rely on the server controlling cipher suite selection. For these assumptions to hold, Pinniped
must be compiled with Go 1.17+. If you are seeing this error message, your attempt to compile Pinniped with an
older Go compiler was explicitly failed to prevent an unsafe configuration.`
}

215
internal/crypto/ptls/ptls.go Normal file
View File

@ -0,0 +1,215 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package ptls
import (
"crypto/tls"
"crypto/x509"
"fmt"
"net/http"
"sync"
"k8s.io/apiserver/pkg/admission"
genericapiserver "k8s.io/apiserver/pkg/server"
"k8s.io/apiserver/pkg/server/options"
kubeinformers "k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/transport"
)
// TODO decide if we need to expose the four TLS levels (secure, default, default-ldap, legacy) as config.
type ConfigFunc func(*x509.CertPool) *tls.Config
func Default(rootCAs *x509.CertPool) *tls.Config {
return &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
//
// The Kubernetes API Server must use TLS 1.2, at a minimum,
// to protect the confidentiality of sensitive data during electronic dissemination.
// https://stigviewer.com/stig/kubernetes/2021-06-17/finding/V-242378
MinVersion: tls.VersionTLS12,
// the order does not matter in go 1.17+ https://go.dev/blog/tls-cipher-suites
// we match crypto/tls.cipherSuitesPreferenceOrder because it makes unit tests easier to write
// this list is ignored when TLS 1.3 is used
//
// as of 2021-10-19, Mozilla Guideline v5.6, Go 1.17.2, intermediate configuration, supports:
// - Firefox 27
// - Android 4.4.2
// - Chrome 31
// - Edge
// - IE 11 on Windows 7
// - Java 8u31
// - OpenSSL 1.0.1
// - Opera 20
// - Safari 9
// https://ssl-config.mozilla.org/#server=go&version=1.17.2&config=intermediate&guideline=5.6
//
// The Kubernetes API server must use approved cipher suites.
// https://stigviewer.com/stig/kubernetes/2021-06-17/finding/V-242418
CipherSuites: []uint16{
// these are all AEADs with ECDHE, some use ChaCha20Poly1305 while others use AES-GCM
// this provides forward secrecy, confidentiality and authenticity of data
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
},
// enable HTTP2 for go's 1.7 HTTP Server
// setting this explicitly is only required in very specific circumstances
// it is simpler to just set it here than to try and determine if we need to
NextProtos: []string{"h2", "http/1.1"},
// optional root CAs, nil means use the host's root CA set
RootCAs: rootCAs,
}
}
func Secure(rootCAs *x509.CertPool) *tls.Config {
// as of 2021-10-19, Mozilla Guideline v5.6, Go 1.17.2, modern configuration, supports:
// - Firefox 63
// - Android 10.0
// - Chrome 70
// - Edge 75
// - Java 11
// - OpenSSL 1.1.1
// - Opera 57
// - Safari 12.1
// https://ssl-config.mozilla.org/#server=go&version=1.17.2&config=modern&guideline=5.6
c := Default(rootCAs)
c.MinVersion = tls.VersionTLS13 // max out the security
c.CipherSuites = []uint16{
// TLS 1.3 ciphers are not configurable, but we need to explicitly set them here to make our client hello behave correctly
// See https://github.com/golang/go/pull/49293
tls.TLS_AES_128_GCM_SHA256,
tls.TLS_AES_256_GCM_SHA384,
tls.TLS_CHACHA20_POLY1305_SHA256,
}
return c
}
func DefaultLDAP(rootCAs *x509.CertPool) *tls.Config {
c := Default(rootCAs)
// add less secure ciphers to support the default AWS Active Directory config
c.CipherSuites = append(c.CipherSuites,
// CBC with ECDHE
// this provides forward secrecy and confidentiality of data but not authenticity
// MAC-then-Encrypt CBC ciphers are susceptible to padding oracle attacks
// See https://crypto.stackexchange.com/a/205 and https://crypto.stackexchange.com/a/224
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
)
return c
}
func Legacy(rootCAs *x509.CertPool) *tls.Config {
c := Default(rootCAs)
// add all the ciphers (even the crappy ones) except the ones that Go considers to be outright broken like 3DES
c.CipherSuites = suitesToIDs(tls.CipherSuites())
return c
}
func suitesToIDs(suites []*tls.CipherSuite) []uint16 {
out := make([]uint16, 0, len(suites))
for _, suite := range suites {
suite := suite
out = append(out, suite.ID)
}
return out
}
func Merge(tlsConfigFunc ConfigFunc, tlsConfig *tls.Config) {
secureTLSConfig := tlsConfigFunc(nil)
// override the core security knobs of the TLS config
// note that these have to be kept in sync with Default / Secure above
tlsConfig.MinVersion = secureTLSConfig.MinVersion
tlsConfig.CipherSuites = secureTLSConfig.CipherSuites
// if the TLS config already states what protocols it wants to use, honor that instead of overriding
if len(tlsConfig.NextProtos) == 0 {
tlsConfig.NextProtos = secureTLSConfig.NextProtos
}
}
// RestConfigFunc allows this package to not depend on the kubeclient package.
type RestConfigFunc func(*rest.Config) (kubernetes.Interface, *rest.Config, error)
func DefaultRecommendedOptions(opts *options.RecommendedOptions, f RestConfigFunc) error {
defaultServing(opts.SecureServing)
return secureClient(opts, f)
}
func SecureRecommendedOptions(opts *options.RecommendedOptions, f RestConfigFunc) error {
secureServing(opts.SecureServing)
return secureClient(opts, f)
}
func defaultServing(opts *options.SecureServingOptionsWithLoopback) {
c := Default(nil)
cipherSuites := make([]string, 0, len(c.CipherSuites))
for _, id := range c.CipherSuites {
cipherSuites = append(cipherSuites, tls.CipherSuiteName(id))
}
opts.CipherSuites = cipherSuites
opts.MinTLSVersion = "VersionTLS12"
}
func secureServing(opts *options.SecureServingOptionsWithLoopback) {
opts.MinTLSVersion = "VersionTLS13"
opts.CipherSuites = nil
}
func secureClient(opts *options.RecommendedOptions, f RestConfigFunc) error {
inClusterClient, inClusterConfig, err := f(nil)
if err != nil {
return fmt.Errorf("failed to build in cluster client: %w", err)
}
if n, z := opts.Authentication.RemoteKubeConfigFile, opts.Authorization.RemoteKubeConfigFile; len(n) > 0 || len(z) > 0 {
return fmt.Errorf("delgating auth is not using in-cluster config:\nauthentication=%s\nauthorization=%s", n, z)
}
// delegated authn and authz provide easy hooks for us to set the TLS config.
// however, the underlying clients use client-go's global TLS cache with an
// in-cluster config. to make this safe, we simply do the mutation once.
wrapperFunc := wrapTransportOnce(inClusterConfig.WrapTransport)
opts.Authentication.CustomRoundTripperFn = wrapperFunc
opts.Authorization.CustomRoundTripperFn = wrapperFunc
opts.CoreAPI = nil // set this to nil to make sure our ExtraAdmissionInitializers is used
baseExtraAdmissionInitializers := opts.ExtraAdmissionInitializers
opts.ExtraAdmissionInitializers = func(c *genericapiserver.RecommendedConfig) ([]admission.PluginInitializer, error) {
// abuse this closure to rewrite how we load admission plugins
c.ClientConfig = inClusterConfig
c.SharedInformerFactory = kubeinformers.NewSharedInformerFactory(inClusterClient, 0)
// abuse this closure to rewrite our loopback config
// this is mostly future proofing for post start hooks
_, loopbackConfig, err := f(c.LoopbackClientConfig)
if err != nil {
return nil, fmt.Errorf("failed to build loopback config: %w", err)
}
c.LoopbackClientConfig = loopbackConfig
return baseExtraAdmissionInitializers(c)
}
return nil
}
func wrapTransportOnce(f transport.WrapperFunc) transport.WrapperFunc {
var once sync.Once
return func(rt http.RoundTripper) http.RoundTripper {
once.Do(func() {
_ = f(rt) // assume in-place mutation
})
return rt
}
}

253
internal/crypto/ptls/ptls_test.go Normal file
View File

@ -0,0 +1,253 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package ptls
import (
"crypto/tls"
"testing"
"github.com/stretchr/testify/require"
"k8s.io/apiserver/pkg/server/options"
)
func TestDefaultServing(t *testing.T) {
t.Parallel()
opts := &options.SecureServingOptionsWithLoopback{SecureServingOptions: &options.SecureServingOptions{}}
defaultServing(opts)
require.Equal(t, options.SecureServingOptionsWithLoopback{
SecureServingOptions: &options.SecureServingOptions{
CipherSuites: []string{
"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256",
},
MinTLSVersion: "VersionTLS12",
},
}, *opts)
}
func TestSecureServing(t *testing.T) {
t.Parallel()
opts := &options.SecureServingOptionsWithLoopback{SecureServingOptions: &options.SecureServingOptions{}}
secureServing(opts)
require.Equal(t, options.SecureServingOptionsWithLoopback{
SecureServingOptions: &options.SecureServingOptions{
MinTLSVersion: "VersionTLS13",
},
}, *opts)
}
func TestMerge(t *testing.T) {
t.Parallel()
tests := []struct {
name string
tlsConfigFunc ConfigFunc
tlsConfig *tls.Config
want *tls.Config
}{
{
name: "default no protos",
tlsConfigFunc: Default,
tlsConfig: &tls.Config{
ServerName: "something-to-check-passthrough",
},
want: &tls.Config{
ServerName: "something-to-check-passthrough",
MinVersion: tls.VersionTLS12,
CipherSuites: []uint16{
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
},
NextProtos: []string{"h2", "http/1.1"},
},
},
{
name: "default with protos",
tlsConfigFunc: Default,
tlsConfig: &tls.Config{
ServerName: "a different thing for passthrough",
NextProtos: []string{"panda"},
},
want: &tls.Config{
ServerName: "a different thing for passthrough",
MinVersion: tls.VersionTLS12,
CipherSuites: []uint16{
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
},
NextProtos: []string{"panda"},
},
},
{
name: "secure no protos",
tlsConfigFunc: Secure,
tlsConfig: &tls.Config{
ServerName: "something-to-check-passthrough",
},
want: &tls.Config{
ServerName: "something-to-check-passthrough",
MinVersion: tls.VersionTLS13,
CipherSuites: []uint16{
tls.TLS_AES_128_GCM_SHA256,
tls.TLS_AES_256_GCM_SHA384,
tls.TLS_CHACHA20_POLY1305_SHA256,
},
NextProtos: []string{"h2", "http/1.1"},
},
},
{
name: "secure with protos",
tlsConfigFunc: Secure,
tlsConfig: &tls.Config{
ServerName: "a different thing for passthrough",
NextProtos: []string{"panda"},
},
want: &tls.Config{
ServerName: "a different thing for passthrough",
MinVersion: tls.VersionTLS13,
CipherSuites: []uint16{
tls.TLS_AES_128_GCM_SHA256,
tls.TLS_AES_256_GCM_SHA384,
tls.TLS_CHACHA20_POLY1305_SHA256,
},
NextProtos: []string{"panda"},
},
},
{
name: "default ldap no protos",
tlsConfigFunc: DefaultLDAP,
tlsConfig: &tls.Config{
ServerName: "something-to-check-passthrough",
},
want: &tls.Config{
ServerName: "something-to-check-passthrough",
MinVersion: tls.VersionTLS12,
CipherSuites: []uint16{
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, //nolint: gosec // yeah, I know it is a bad cipher, but AD sucks
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
},
NextProtos: []string{"h2", "http/1.1"},
},
},
{
name: "default ldap with protos",
tlsConfigFunc: DefaultLDAP,
tlsConfig: &tls.Config{
ServerName: "a different thing for passthrough",
NextProtos: []string{"panda"},
},
want: &tls.Config{
ServerName: "a different thing for passthrough",
MinVersion: tls.VersionTLS12,
CipherSuites: []uint16{
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, //nolint: gosec // yeah, I know it is a bad cipher, but AD sucks
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
},
NextProtos: []string{"panda"},
},
},
{
name: "legacy no protos",
tlsConfigFunc: Legacy,
tlsConfig: &tls.Config{
ServerName: "something-to-check-passthrough",
},
want: &tls.Config{
ServerName: "something-to-check-passthrough",
MinVersion: tls.VersionTLS12,
CipherSuites: []uint16{
tls.TLS_RSA_WITH_AES_128_CBC_SHA, //nolint: gosec // yeah, I know it is a bad cipher, this is the legacy config
tls.TLS_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_AES_128_GCM_SHA256,
tls.TLS_AES_256_GCM_SHA384,
tls.TLS_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
},
NextProtos: []string{"h2", "http/1.1"},
},
},
{
name: "legacy with protos",
tlsConfigFunc: Legacy,
tlsConfig: &tls.Config{
ServerName: "a different thing for passthrough",
NextProtos: []string{"panda"},
},
want: &tls.Config{
ServerName: "a different thing for passthrough",
MinVersion: tls.VersionTLS12,
CipherSuites: []uint16{
tls.TLS_RSA_WITH_AES_128_CBC_SHA, //nolint: gosec // yeah, I know it is a bad cipher, this is the legacy config
tls.TLS_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_AES_128_GCM_SHA256,
tls.TLS_AES_256_GCM_SHA384,
tls.TLS_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
},
NextProtos: []string{"panda"},
},
},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
Merge(tt.tlsConfigFunc, tt.tlsConfig)
require.Equal(t, tt.want, tt.tlsConfig)
})
}
}

8
internal/dynamiccert/provider_test.go
View File

@ -19,6 +19,7 @@ import (
"k8s.io/apiserver/pkg/storage/names"
"go.pinniped.dev/internal/certauthority"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/test/testlib"
)
@ -160,11 +161,8 @@ func TestProviderWithDynamicServingCertificateController(t *testing.T) {
err = certKeyContent.SetCertKeyContent(cert, key)
require.NoError(t, err)
tlsConfig := &tls.Config{
MinVersion: tls.VersionTLS12,
NextProtos: []string{"h2", "http/1.1"},
ClientAuth: tls.RequestClientCert,
}
tlsConfig := ptls.Default(nil)
tlsConfig.ClientAuth = tls.RequestClientCert
dynamicCertificateController := dynamiccertificates.NewDynamicServingCertificateController(
tlsConfig,

25
internal/httputil/roundtripper/roundtripper.go
View File

@ -3,7 +3,11 @@
package roundtripper
import "net/http"
import (
"net/http"
"k8s.io/apimachinery/pkg/util/net"
)
var _ http.RoundTripper = Func(nil)
@ -12,3 +16,22 @@ type Func func(*http.Request) (*http.Response, error)
func (f Func) RoundTrip(req *http.Request) (*http.Response, error) {
return f(req)
}
var _ net.RoundTripperWrapper = &wrapper{}
type wrapper struct {
delegate http.RoundTripper
f Func
}
func (w *wrapper) RoundTrip(req *http.Request) (*http.Response, error) {
return w.f.RoundTrip(req)
}
func (w *wrapper) WrappedRoundTripper() http.RoundTripper {
return w.delegate
}
func WrapFunc(delegate http.RoundTripper, f Func) net.RoundTripperWrapper {
return &wrapper{delegate: delegate, f: f}
}

157
internal/kubeclient/kubeclient.go
View File

@ -4,9 +4,17 @@
package kubeclient
import (
"crypto/tls"
"crypto/x509"
"fmt"
"net/http"
"reflect"
"unsafe"
"github.com/google/go-cmp/cmp"
"github.com/google/go-cmp/cmp/cmpopts"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/net"
"k8s.io/client-go/kubernetes"
kubescheme "k8s.io/client-go/kubernetes/scheme"
restclient "k8s.io/client-go/rest"
@ -17,6 +25,7 @@ import (
pinnipedconciergeclientsetscheme "go.pinniped.dev/generated/latest/client/concierge/clientset/versioned/scheme"
pinnipedsupervisorclientset "go.pinniped.dev/generated/latest/client/supervisor/clientset/versioned"
pinnipedsupervisorclientsetscheme "go.pinniped.dev/generated/latest/client/supervisor/clientset/versioned/scheme"
"go.pinniped.dev/internal/crypto/ptls"
)
type Client struct {
@ -44,11 +53,16 @@ func New(opts ...Option) (*Client, error) {
WithConfig(inClusterConfig)(c) // make sure all writes to clientConfig flow through one code path
}
secureKubeConfig, err := createSecureKubeConfig(c.config)
if err != nil {
return nil, fmt.Errorf("could not create secure client config: %w", err)
}
// explicitly use json when talking to CRD APIs
jsonKubeConfig := createJSONKubeConfig(c.config)
jsonKubeConfig := createJSONKubeConfig(secureKubeConfig)
// explicitly use protobuf when talking to built-in kube APIs
protoKubeConfig := createProtoKubeConfig(c.config)
protoKubeConfig := createProtoKubeConfig(secureKubeConfig)
// Connect to the core Kubernetes API.
k8sClient, err := kubernetes.NewForConfig(configWithWrapper(protoKubeConfig, kubescheme.Scheme, kubescheme.Codecs, c.middlewares, c.transportWrapper))
@ -107,3 +121,142 @@ func createProtoKubeConfig(kubeConfig *restclient.Config) *restclient.Config {
protoKubeConfig.ContentType = runtime.ContentTypeProtobuf
return protoKubeConfig
}
// createSecureKubeConfig returns a copy of the input config with the WrapTransport
// enhanced to use the secure TLS configuration of the ptls / phttp packages.
func createSecureKubeConfig(kubeConfig *restclient.Config) (*restclient.Config, error) {
secureKubeConfig := restclient.CopyConfig(kubeConfig)
// by setting proxy to always be non-nil, we bust the client-go global TLS config cache.
// this is required to make our wrapper function work without data races. the unit tests
// associated with this code run in parallel to assert that we are not using the cache.
// see k8s.io/client-go/transport.tlsConfigKey
if secureKubeConfig.Proxy == nil {
secureKubeConfig.Proxy = net.NewProxierWithNoProxyCIDR(http.ProxyFromEnvironment)
}
// make sure restclient.TLSConfigFor always returns a non-nil TLS config
if len(secureKubeConfig.NextProtos) == 0 {
secureKubeConfig.NextProtos = ptls.Secure(nil).NextProtos
}
tlsConfigTest, err := restclient.TLSConfigFor(secureKubeConfig)
if err != nil {
return nil, err // should never happen because our input config should always be valid
}
if tlsConfigTest == nil {
return nil, fmt.Errorf("unexpected empty TLS config") // should never happen because we set NextProtos above
}
secureKubeConfig.Wrap(func(rt http.RoundTripper) http.RoundTripper {
defer func() {
if err := AssertSecureTransport(rt); err != nil {
panic(err) // not sure what the point of this function would be if it failed to make the config secure
}
}()
tlsConfig, err := netTLSClientConfig(rt)
if err != nil {
// this assumes none of our production code calls Wrap or messes with WrapTransport.
// this is a reasonable assumption because all such code should live in this package
// and all such code should run after this function is called, not before. the kube
// codebase uses transport wrappers that can be unwrapped to access the underlying
// TLS config.
panic(err)
}
if tlsConfig == nil {
panic("unexpected empty TLS config") // we validate this case above via tlsConfigTest
}
// mutate the TLS config into our desired state before it is used
ptls.Merge(ptls.Secure, tlsConfig)
return rt // return the input transport since we mutated it in-place
})
if err := AssertSecureConfig(secureKubeConfig); err != nil {
return nil, err // not sure what the point of this function would be if it failed to make the config secure
}
return secureKubeConfig, nil
}
// SecureAnonymousClientConfig has the same properties as restclient.AnonymousClientConfig
// while still enforcing the secure TLS configuration of the ptls / phttp packages.
func SecureAnonymousClientConfig(kubeConfig *restclient.Config) *restclient.Config {
kubeConfig = restclient.AnonymousClientConfig(kubeConfig)
secureKubeConfig, err := createSecureKubeConfig(kubeConfig)
if err != nil {
panic(err) // should never happen as this would only fail on invalid CA data, which would never work anyway
}
if err := AssertSecureConfig(secureKubeConfig); err != nil {
panic(err) // not sure what the point of this function would be if it failed to make the config secure
}
return secureKubeConfig
}
func AssertSecureConfig(kubeConfig *restclient.Config) error {
rt, err := restclient.TransportFor(kubeConfig)
if err != nil {
return fmt.Errorf("failed to build transport: %w", err)
}
return AssertSecureTransport(rt)
}
func AssertSecureTransport(rt http.RoundTripper) error {
tlsConfig, err := netTLSClientConfig(rt)
if err != nil {
return fmt.Errorf("failed to get TLS config: %w", err)
}
tlsConfigCopy := tlsConfig.Clone()
ptls.Merge(ptls.Secure, tlsConfigCopy) // only mutate the copy
//nolint: gosec // the empty TLS config here is not used
if diff := cmp.Diff(tlsConfigCopy, tlsConfig,
cmpopts.IgnoreUnexported(tls.Config{}, x509.CertPool{}),
cmpopts.IgnoreFields(tls.Config{}, "GetClientCertificate"),
); len(diff) != 0 {
return fmt.Errorf("tls config is not secure:\n%s", diff)
}
return nil
}
func netTLSClientConfig(rt http.RoundTripper) (*tls.Config, error) {
tlsConfig, err := net.TLSClientConfig(rt)
if err == nil {
return tlsConfig, nil
}
// TODO fix when we pick up https://github.com/kubernetes/kubernetes/pull/106014
if err.Error() == "unknown transport type: *exec.roundTripper" {
return net.TLSClientConfig(extractRTUnsafe(rt))
}
return nil, err
}
func extractRTUnsafe(rt http.RoundTripper) (out http.RoundTripper) {
for wrapper, ok := rt.(net.RoundTripperWrapper); ok; wrapper, ok = rt.(net.RoundTripperWrapper) {
// keep peeling the wrappers until we get to the exec.roundTripper
rt = wrapper.WrappedRoundTripper()
}
// this is some dark magic to read a private field
baseField := reflect.ValueOf(rt).Elem().FieldByName("base")
basePointer := (*http.RoundTripper)(unsafe.Pointer(baseField.UnsafeAddr()))
return *basePointer
}
func Secure(config *restclient.Config) (kubernetes.Interface, *restclient.Config, error) {
// our middleware does not apply to the returned restclient.Config, therefore, this
// client not having a leader election lock is irrelevant since it would not be enforced
secureClient, err := New(WithConfig(config)) // handles nil config correctly
if err != nil {
return nil, nil, fmt.Errorf("failed to build secure client: %w", err)
}
return secureClient.Kubernetes, secureClient.ProtoConfig, nil
}

317
internal/kubeclient/kubeclient_test.go
View File

@ -7,22 +7,31 @@ import (
"context"
"fmt"
"io"
"net"
"net/http"
"net/url"
"runtime"
"strings"
"sync"
"testing"
"time"
"github.com/stretchr/testify/require"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
clientauthenticationv1 "k8s.io/client-go/pkg/apis/clientauthentication/v1"
"k8s.io/client-go/rest"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
"k8s.io/client-go/transport"
apiregistrationv1 "k8s.io/kube-aggregator/pkg/apis/apiregistration/v1"
// register all client-go auth plugins.
_ "k8s.io/client-go/plugin/pkg/client/auth"
conciergeconfigv1alpha1 "go.pinniped.dev/generated/latest/apis/concierge/config/v1alpha1"
supervisorconfigv1alpha1 "go.pinniped.dev/generated/latest/apis/supervisor/config/v1alpha1"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/httputil/roundtripper"
"go.pinniped.dev/internal/testutil/fakekubeapi"
)
@ -514,9 +523,12 @@ func TestKubeclient(t *testing.T) {
return []*spyMiddleware{newSimpleMiddleware(t, true, false, false)}
},
editRestConfig: func(t *testing.T, restConfig *rest.Config) {
restConfig.Dial = func(_ context.Context, _, _ string) (net.Conn, error) {
return nil, fmt.Errorf("some fake connection error")
}
// avoid messing with restConfig.Dial since it breaks client-go TLS cache logic
restConfig.Wrap(func(rt http.RoundTripper) http.RoundTripper {
return roundtripper.WrapFunc(rt, func(_ *http.Request) (*http.Response, error) {
return nil, fmt.Errorf("some fake connection error")
})
})
},
reallyRunTest: func(t *testing.T, c *Client) {
_, err := c.PinnipedSupervisor.
@ -591,8 +603,7 @@ func TestKubeclient(t *testing.T) {
for _, test := range tests {
test := test
t.Run(test.name, func(t *testing.T) {
server, restConfig := fakekubeapi.Start(t, nil)
defer server.Close()
_, restConfig := fakekubeapi.Start(t, nil)
if test.editRestConfig != nil {
test.editRestConfig(t, restConfig)
@ -754,21 +765,45 @@ func newFailingMiddleware(t *testing.T, name string, mutateReqFails, mutateRespF
}
type wantCloser struct {
io.ReadCloser
closeCount int
closeCalls []string
couldReadBytesJustBeforeClosing bool
m sync.Mutex
_rc io.ReadCloser
_closeCalls []string
_couldReadBytesJustBeforeClosing bool
}
func (wc *wantCloser) Close() error {
wc.closeCount++
wc.closeCalls = append(wc.closeCalls, getCaller())
n, _ := wc.ReadCloser.Read([]byte{0})
func (w *wantCloser) Close() error {
w.m.Lock()
defer w.m.Unlock()
w._closeCalls = append(w._closeCalls, getCaller())
n, _ := w._rc.Read([]byte{0})
if n > 0 {
// there were still bytes left to be read
wc.couldReadBytesJustBeforeClosing = true
w._couldReadBytesJustBeforeClosing = true
}
return wc.ReadCloser.Close()
return w._rc.Close()
}
func (w *wantCloser) Read(p []byte) (int, error) {
w.m.Lock()
defer w.m.Unlock()
return w._rc.Read(p)
}
func (w *wantCloser) couldRead() bool {
w.m.Lock()
defer w.m.Unlock()
return w._couldReadBytesJustBeforeClosing
}
func (w *wantCloser) calls() []string {
w.m.Lock()
defer w.m.Unlock()
return w._closeCalls
}
func getCaller() string {
@ -785,11 +820,14 @@ func getCaller() string {
func wantCloseReqWrapper(t *testing.T) transport.WrapperFunc {
caller := getCaller()
return func(rt http.RoundTripper) http.RoundTripper {
return roundTripperFunc(func(req *http.Request) (bool, *http.Response, error) {
return roundtripper.WrapFunc(rt, roundTripperFunc(func(req *http.Request) (bool, *http.Response, error) {
if req.Body != nil {
wc := &wantCloser{ReadCloser: req.Body}
wc := &wantCloser{_rc: req.Body}
t.Cleanup(func() {
require.Equalf(t, wc.closeCount, 1, "did not close req body expected number of times at %s for req %#v; actual calls = %s", caller, req, wc.closeCalls)
require.Eventuallyf(t, func() bool {
return 1 == len(wc.calls())
}, 5*time.Second, 100*time.Millisecond,
"did not close req body expected number of times at %s for req %#v; actual calls = %s", caller, req, wc.calls())
})
req.Body = wc
}
@ -800,9 +838,12 @@ func wantCloseReqWrapper(t *testing.T) transport.WrapperFunc {
if originalErr != nil {
return nil, originalErr
}
wc := &wantCloser{ReadCloser: originalBodyCopy}
wc := &wantCloser{_rc: originalBodyCopy}
t.Cleanup(func() {
require.Equalf(t, wc.closeCount, 1, "did not close req body copy expected number of times at %s for req %#v; actual calls = %s", caller, req, wc.closeCalls)
require.Eventuallyf(t, func() bool {
return 1 == len(wc.calls())
}, 5*time.Second, 100*time.Millisecond,
"did not close req body copy expected number of times at %s for req %#v; actual calls = %s", caller, req, wc.calls())
})
return wc, nil
}
@ -810,7 +851,7 @@ func wantCloseReqWrapper(t *testing.T) transport.WrapperFunc {
resp, err := rt.RoundTrip(req)
return false, resp, err
})
}).RoundTrip)
}
}
@ -819,20 +860,24 @@ func wantCloseReqWrapper(t *testing.T) transport.WrapperFunc {
func wantCloseRespWrapper(t *testing.T) transport.WrapperFunc {
caller := getCaller()
return func(rt http.RoundTripper) http.RoundTripper {
return roundTripperFunc(func(req *http.Request) (bool, *http.Response, error) {
return roundtripper.WrapFunc(rt, roundTripperFunc(func(req *http.Request) (bool, *http.Response, error) {
resp, err := rt.RoundTrip(req)
if err != nil {
// request failed, so there is no response body to watch for Close() calls on
return false, resp, err
}
wc := &wantCloser{ReadCloser: resp.Body}
wc := &wantCloser{_rc: resp.Body}
t.Cleanup(func() {
require.False(t, wc.couldReadBytesJustBeforeClosing, "did not consume all response body bytes before closing %s", caller)
require.Equalf(t, wc.closeCount, 1, "did not close resp body expected number of times at %s for req %#v; actual calls = %s", caller, req, wc.closeCalls)
require.Eventuallyf(t, func() bool {
return wc.couldRead() == false &&
1 == len(wc.calls())
}, 5*time.Second, 10*time.Millisecond,
`did not close resp body expected number of times at %s for req %#v; actual calls = %s
did not consume all response body bytes before closing %s, couldRead=%v`, caller, req, wc.calls(), caller, wc.couldRead())
})
resp.Body = wc
return false, resp, err
})
}).RoundTrip)
}
}
@ -895,3 +940,221 @@ func createGetFederationDomainTest(t *testing.T, client *Client) {
require.NoError(t, err)
require.Equal(t, goodFederationDomain, federationDomain)
}
// TestUnwrap ensures that the Client struct returned by this package only contains
// transports that can be fully unwrapped to get access to the underlying TLS config.
func TestUnwrap(t *testing.T) {
t.Parallel() // make sure to run in parallel to confirm that our client-go TLS cache busting works (i.e. assert no data races)
server, restConfig := fakekubeapi.Start(t, nil)
serverSubjects := server.Client().Transport.(*http.Transport).TLSClientConfig.RootCAs.Subjects()
t.Run("regular client", func(t *testing.T) {
t.Parallel() // make sure to run in parallel to confirm that our client-go TLS cache busting works (i.e. assert no data races)
regularClient := makeClient(t, restConfig, func(_ *rest.Config) {})
testUnwrap(t, regularClient, serverSubjects)
})
t.Run("exec client", func(t *testing.T) {
t.Parallel() // make sure to run in parallel to confirm that our client-go TLS cache busting works (i.e. assert no data races)
execClient := makeClient(t, restConfig, func(config *rest.Config) {
config.ExecProvider = &clientcmdapi.ExecConfig{
Command: "echo",
Args: []string{"pandas are awesome"},
APIVersion: clientauthenticationv1.SchemeGroupVersion.String(),
InteractiveMode: clientcmdapi.NeverExecInteractiveMode,
}
})
testUnwrap(t, execClient, serverSubjects)
})
t.Run("gcp client", func(t *testing.T) {
t.Parallel() // make sure to run in parallel to confirm that our client-go TLS cache busting works (i.e. assert no data races)
gcpClient := makeClient(t, restConfig, func(config *rest.Config) {
config.AuthProvider = &clientcmdapi.AuthProviderConfig{
Name: "gcp",
}
})
testUnwrap(t, gcpClient, serverSubjects)
})
t.Run("oidc client", func(t *testing.T) {
t.Parallel() // make sure to run in parallel to confirm that our client-go TLS cache busting works (i.e. assert no data races)
oidcClient := makeClient(t, restConfig, func(config *rest.Config) {
config.AuthProvider = &clientcmdapi.AuthProviderConfig{
Name: "oidc",
Config: map[string]string{
"idp-issuer-url": "https://pandas.local",
"client-id": "walrus",
},
}
})
testUnwrap(t, oidcClient, serverSubjects)
})
t.Run("azure client", func(t *testing.T) {
t.Parallel() // make sure to run in parallel to confirm that our client-go TLS cache busting works (i.e. assert no data races)
azureClient := makeClient(t, restConfig, func(config *rest.Config) {
config.AuthProvider = &clientcmdapi.AuthProviderConfig{
Name: "azure",
Config: map[string]string{
"client-id": "pinny",
"tenant-id": "danger",
"apiserver-id": "1234",
},
}
})
testUnwrap(t, azureClient, serverSubjects)
})
}
func testUnwrap(t *testing.T, client *Client, serverSubjects [][]byte) {
tests := []struct {
name string
rt http.RoundTripper
}{
{
name: "core v1",
rt: extractTransport(client.Kubernetes.CoreV1()),
},
{
name: "coordination v1",
rt: extractTransport(client.Kubernetes.CoordinationV1()),
},
{
name: "api registration v1",
rt: extractTransport(client.Aggregation.ApiregistrationV1()),
},
{
name: "concierge login",
rt: extractTransport(client.PinnipedConcierge.LoginV1alpha1()),
},
{
name: "concierge config",
rt: extractTransport(client.PinnipedConcierge.ConfigV1alpha1()),
},
{
name: "supervisor idp",
rt: extractTransport(client.PinnipedSupervisor.IDPV1alpha1()),
},
{
name: "supervisor config",
rt: extractTransport(client.PinnipedSupervisor.ConfigV1alpha1()),
},
{
name: "json config",
rt: configToTransport(t, client.JSONConfig),
},
{
name: "proto config",
rt: configToTransport(t, client.ProtoConfig),
},
{
name: "anonymous json config",
rt: configToTransport(t, SecureAnonymousClientConfig(client.JSONConfig)),
},
{
name: "anonymous proto config",
rt: configToTransport(t, SecureAnonymousClientConfig(client.ProtoConfig)),
},
{
name: "json config - no cache",
rt: configToTransport(t, bustTLSCache(client.JSONConfig)),
},
{
name: "proto config - no cache",
rt: configToTransport(t, bustTLSCache(client.ProtoConfig)),
},
{
name: "anonymous json config - no cache, inner bust",
rt: configToTransport(t, SecureAnonymousClientConfig(bustTLSCache(client.JSONConfig))),
},
{
name: "anonymous proto config - no cache, inner bust",
rt: configToTransport(t, SecureAnonymousClientConfig(bustTLSCache(client.ProtoConfig))),
},
{
name: "anonymous json config - no cache, double bust",
rt: configToTransport(t, bustTLSCache(SecureAnonymousClientConfig(bustTLSCache(client.JSONConfig)))),
},
{
name: "anonymous proto config - no cache, double bust",
rt: configToTransport(t, bustTLSCache(SecureAnonymousClientConfig(bustTLSCache(client.ProtoConfig)))),
},
{
name: "anonymous json config - no cache, outer bust",
rt: configToTransport(t, bustTLSCache(SecureAnonymousClientConfig(client.JSONConfig))),
},
{
name: "anonymous proto config - no cache, outer bust",
rt: configToTransport(t, bustTLSCache(SecureAnonymousClientConfig(client.ProtoConfig))),
},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
t.Parallel() // make sure to run in parallel to confirm that our client-go TLS cache busting works (i.e. assert no data races)
tlsConfig, err := netTLSClientConfig(tt.rt)
require.NoError(t, err)
require.NotNil(t, tlsConfig)
secureTLSConfig := ptls.Secure(nil)
require.Equal(t, secureTLSConfig.MinVersion, tlsConfig.MinVersion)
require.Equal(t, secureTLSConfig.CipherSuites, tlsConfig.CipherSuites)
require.Equal(t, secureTLSConfig.NextProtos, tlsConfig.NextProtos)
// x509.CertPool has some embedded functions that make it hard to compare so just look at the subjects
require.Equal(t, serverSubjects, tlsConfig.RootCAs.Subjects())
})
}
}
type restClientGetter interface {
RESTClient() rest.Interface
}
func extractTransport(getter restClientGetter) http.RoundTripper {
return getter.RESTClient().(*rest.RESTClient).Client.Transport
}
func configToTransport(t *testing.T, config *rest.Config) http.RoundTripper {
t.Helper()
rt, err := rest.TransportFor(config)
require.NoError(t, err)
return rt
}
func bustTLSCache(config *rest.Config) *rest.Config {
c := rest.CopyConfig(config)
c.Proxy = func(h *http.Request) (*url.URL, error) {
return nil, nil // having a non-nil proxy func makes client-go not cache the TLS config
}
return c
}
func makeClient(t *testing.T, restConfig *rest.Config, f func(*rest.Config)) *Client {
t.Helper()
restConfig = rest.CopyConfig(restConfig)
f(restConfig)
client, err := New(WithConfig(restConfig))
require.NoError(t, err)
return client
}

5
internal/kubeclient/roundtrip.go
View File

@ -20,6 +20,7 @@ import (
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/transport"
"go.pinniped.dev/internal/httputil/roundtripper"
"go.pinniped.dev/internal/plog"
)
@ -78,7 +79,7 @@ func newWrapper(
middlewares []Middleware,
) transport.WrapperFunc {
return func(rt http.RoundTripper) http.RoundTripper {
return roundTripperFunc(func(req *http.Request) (bool, *http.Response, error) {
return roundtripper.WrapFunc(rt, roundTripperFunc(func(req *http.Request) (bool, *http.Response, error) {
reqInfo, err := resolver.NewRequestInfo(reqWithoutPrefix(req, hostURL, apiPathPrefix))
if err != nil || !reqInfo.IsResourceRequest {
resp, err := rt.RoundTrip(req) // we only handle kube resource requests
@ -120,7 +121,7 @@ func newWrapper(
resp, err := rt.RoundTrip(req) // we only handle certain verbs
return false, resp, err
}
})
}).RoundTrip)
}
}

18
internal/localuserauthenticator/localuserauthenticator.go
View File

@ -36,6 +36,7 @@ import (
"go.pinniped.dev/internal/constable"
"go.pinniped.dev/internal/controller/apicerts"
"go.pinniped.dev/internal/controllerlib"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/dynamiccert"
"go.pinniped.dev/internal/kubeclient"
"go.pinniped.dev/internal/plog"
@ -71,16 +72,15 @@ func newWebhook(
// start runs the webhook in a separate goroutine and returns whether or not the
// webhook was started successfully.
func (w *webhook) start(ctx context.Context, l net.Listener) error {
c := ptls.Secure(nil)
c.GetCertificate = func(_ *tls.ClientHelloInfo) (*tls.Certificate, error) {
certPEM, keyPEM := w.certProvider.CurrentCertKeyContent()
cert, err := tls.X509KeyPair(certPEM, keyPEM)
return &cert, err
}
server := http.Server{
Handler: w,
TLSConfig: &tls.Config{
MinVersion: tls.VersionTLS13,
GetCertificate: func(_ *tls.ClientHelloInfo) (*tls.Certificate, error) {
certPEM, keyPEM := w.certProvider.CurrentCertKeyContent()
cert, err := tls.X509KeyPair(certPEM, keyPEM)
return &cert, err
},
},
Handler: w,
TLSConfig: c,
}
errCh := make(chan error)

29
internal/localuserauthenticator/localuserauthenticator_test.go
View File

@ -6,7 +6,6 @@ package localuserauthenticator
import (
"bytes"
"context"
"crypto/tls"
"crypto/x509"
"encoding/json"
"fmt"
@ -25,6 +24,7 @@ import (
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
utilnet "k8s.io/apimachinery/pkg/util/net"
kubeinformers "k8s.io/client-go/informers"
corev1informers "k8s.io/client-go/informers/core/v1"
"k8s.io/client-go/kubernetes"
@ -32,6 +32,7 @@ import (
"go.pinniped.dev/internal/certauthority"
"go.pinniped.dev/internal/dynamiccert"
"go.pinniped.dev/internal/net/phttp"
)
func TestWebhook(t *testing.T) {
@ -102,7 +103,7 @@ func TestWebhook(t *testing.T) {
defer func() { _ = l.Close() }()
require.NoError(t, w.start(ctx, l))
client := newClient(caBundle, serverName)
client := newClient(t, caBundle, serverName)
goodURL := fmt.Sprintf("https://%s/authenticate", l.Addr().String())
goodRequestHeaders := map[string][]string{
@ -475,18 +476,20 @@ func newCertProvider(t *testing.T) (dynamiccert.Private, []byte, string) {
// newClient creates an http.Client that can be used to make an HTTPS call to a
// service whose serving certs can be verified by the provided CA bundle.
func newClient(caBundle []byte, serverName string) *http.Client {
func newClient(t *testing.T, caBundle []byte, serverName string) *http.Client {
t.Helper()
rootCAs := x509.NewCertPool()
rootCAs.AppendCertsFromPEM(caBundle)
return &http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
MinVersion: tls.VersionTLS13,
RootCAs: rootCAs,
ServerName: serverName,
},
},
}
ok := rootCAs.AppendCertsFromPEM(caBundle)
require.True(t, ok)
c := phttp.Secure(rootCAs)
tlsConfig, err := utilnet.TLSClientConfig(c.Transport)
require.NoError(t, err)
tlsConfig.ServerName = serverName
return c
}
// newTokenReviewBody creates an io.ReadCloser that contains a JSON-encodeed

118
internal/net/phttp/debug.go Normal file
View File

@ -0,0 +1,118 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package phttp
import (
"net/http"
"net/url"
"k8s.io/client-go/transport"
"go.pinniped.dev/internal/httputil/roundtripper"
)
func safeDebugWrappers(rt http.RoundTripper, f transport.WrapperFunc, shouldLog func() bool) http.RoundTripper {
return roundtripper.WrapFunc(rt, func(req *http.Request) (*http.Response, error) {
// minor optimization to avoid the cleaning logic when the debug wrappers are unused
// note: do not make this entire wrapper conditional on shouldLog() - the output is allowed to change at runtime
if !shouldLog() {
return rt.RoundTrip(req)
}
var (
resp *http.Response
err error
)
debugRT := f(roundtripper.Func(func(_ *http.Request) (*http.Response, error) {
// this call needs to be inside this closure so that the debug wrappers can time it
// note also that it takes the original (real) request
resp, err = rt.RoundTrip(req)
cleanedResp := cleanResp(resp) // do not leak the user's password during the password grant
return cleanedResp, err
}))
// run the debug wrappers for their side effects (i.e. logging)
// the output is ignored because the input is not the real request
cleanedReq := cleanReq(req) // do not leak the user's password during the password grant
_, _ = debugRT.RoundTrip(cleanedReq)
return resp, err
})
}
func cleanReq(req *http.Request) *http.Request {
// only pass back things we know to be safe to log
return &http.Request{
Method: req.Method,
URL: cleanURL(req.URL),
Header: cleanHeader(req.Header),
}
}
func cleanResp(resp *http.Response) *http.Response {
if resp == nil {
return nil
}
// only pass back things we know to be safe to log
return &http.Response{
Status: resp.Status,
Header: cleanHeader(resp.Header),
}
}
func cleanURL(u *url.URL) *url.URL {
var user *url.Userinfo
if len(u.User.Username()) > 0 {
user = url.User("masked_username")
}
var opaque string
if len(u.Opaque) > 0 {
opaque = "masked_opaque_data"
}
var fragment string
if len(u.Fragment) > 0 || len(u.RawFragment) > 0 {
fragment = "masked_fragment"
}
// only pass back things we know to be safe to log
return &url.URL{
Scheme: u.Scheme,
Opaque: opaque,
User: user,
Host: u.Host,
Path: u.Path,
RawPath: u.RawPath,
ForceQuery: u.ForceQuery,
RawQuery: cleanQuery(u.Query()),
Fragment: fragment,
}
}
func cleanQuery(query url.Values) string {
if len(query) == 0 {
return ""
}
out := url.Values(cleanHeader(http.Header(query))) // cast so we can re-use logic
return out.Encode()
}
func cleanHeader(header http.Header) http.Header {
if len(header) == 0 {
return nil
}
mask := []string{"masked_value"}
out := make(http.Header, len(header))
for key := range header {
out[key] = mask // only copy the keys
}
return out
}

340
internal/net/phttp/debug_test.go Normal file
View File

@ -0,0 +1,340 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package phttp
import (
"bytes"
"context"
"io"
"net/http"
"net/url"
"testing"
"github.com/stretchr/testify/require"
"go.pinniped.dev/internal/constable"
"go.pinniped.dev/internal/httputil/roundtripper"
)
func Test_safeDebugWrappers_shouldLog(t *testing.T) {
t.Parallel()
var rtFuncCalled, wrapFuncCalled, innerRTCalled int
var shouldLog, skipInnerRT bool
shouldLogFunc := func() bool { return shouldLog }
rtFunc := roundtripper.Func(func(_ *http.Request) (*http.Response, error) {
rtFuncCalled++
return nil, nil
})
wrapFunc := func(rt http.RoundTripper) http.RoundTripper {
wrapFuncCalled++
return roundtripper.Func(func(r *http.Request) (*http.Response, error) {
innerRTCalled++
if skipInnerRT {
return nil, nil
}
return rt.RoundTrip(r)
})
}
r := testReq(t, nil, nil)
out := safeDebugWrappers(rtFunc, wrapFunc, shouldLogFunc)
// assert that shouldLogFunc is dynamically honored
_, _ = out.RoundTrip(r) //nolint:bodyclose
require.Equal(t, 1, rtFuncCalled)
require.Equal(t, 0, wrapFuncCalled)
require.Equal(t, 0, innerRTCalled)
shouldLog = true
_, _ = out.RoundTrip(r) //nolint:bodyclose
require.Equal(t, 2, rtFuncCalled)
require.Equal(t, 1, wrapFuncCalled)
require.Equal(t, 1, innerRTCalled)
shouldLog = false
_, _ = out.RoundTrip(r) //nolint:bodyclose
require.Equal(t, 3, rtFuncCalled)
require.Equal(t, 1, wrapFuncCalled)
require.Equal(t, 1, innerRTCalled)
shouldLog = true
_, _ = out.RoundTrip(r) //nolint:bodyclose
require.Equal(t, 4, rtFuncCalled)
require.Equal(t, 2, wrapFuncCalled)
require.Equal(t, 2, innerRTCalled)
// assert that wrapFunc controls rtFunc being called
skipInnerRT = true
_, _ = out.RoundTrip(r) //nolint:bodyclose
require.Equal(t, 4, rtFuncCalled)
require.Equal(t, 3, wrapFuncCalled)
require.Equal(t, 3, innerRTCalled)
skipInnerRT = false
_, _ = out.RoundTrip(r) //nolint:bodyclose
require.Equal(t, 5, rtFuncCalled)
require.Equal(t, 4, wrapFuncCalled)
require.Equal(t, 4, innerRTCalled)
}
func Test_safeDebugWrappers_clean(t *testing.T) {
t.Parallel()
tests := []struct {
name string
shouldLog bool
inReq, wantReq *http.Request
inResp, wantResp *http.Response
inErr error
}{
{
name: "header cleaned",
shouldLog: true,
inReq: testReq(t, http.Header{"hello": {"from", "earth"}}, nil),
wantReq: testCleanReq(http.Header{"hello": {"masked_value"}}, nil),
inResp: testResp(t, http.Header{"bye": {"for", "now"}}), //nolint:bodyclose
wantResp: testCleanResp(http.Header{"bye": {"masked_value"}}), //nolint:bodyclose
inErr: nil,
},
{
name: "header cleaned error",
shouldLog: true,
inReq: testReq(t, http.Header{"see": {"from", "mars"}}, nil),
wantReq: testCleanReq(http.Header{"see": {"masked_value"}}, nil),
inResp: testResp(t, http.Header{"bear": {"is", "a"}}), //nolint:bodyclose
wantResp: testCleanResp(http.Header{"bear": {"masked_value"}}), //nolint:bodyclose
inErr: constable.Error("some error"),
},
{
name: "header cleaned error nil resp",
shouldLog: true,
inReq: testReq(t, http.Header{"see": {"from", "mars"}}, nil),
wantReq: testCleanReq(http.Header{"see": {"masked_value"}}, nil),
inResp: nil,
wantResp: nil,
inErr: constable.Error("some other error"),
},
{
name: "header cleaned no log",
shouldLog: false,
inReq: testReq(t, http.Header{"sky": {"is", "blue"}}, nil),
wantReq: nil,
inResp: testResp(t, http.Header{"night": {"is", "dark"}}), //nolint:bodyclose
wantResp: nil,
inErr: nil,
},
{
name: "url cleaned, all fields",
shouldLog: true,
inReq: testReq(t, nil, &url.URL{
Scheme: "sc",
Opaque: "op",
User: url.UserPassword("us", "pa"),
Host: "ho",
Path: "pa",
RawPath: "rap",
ForceQuery: true,
RawQuery: "key1=val1&key2=val2",
Fragment: "fra",
RawFragment: "rawf",
}),
wantReq: testCleanReq(nil, &url.URL{
Scheme: "sc",
Opaque: "masked_opaque_data",
User: url.User("masked_username"),
Host: "ho",
Path: "pa",
RawPath: "rap",
ForceQuery: true,
RawQuery: "key1=masked_value&key2=masked_value",
Fragment: "masked_fragment",
RawFragment: "",
}),
inResp: testResp(t, http.Header{"sun": {"yellow"}}), //nolint:bodyclose
wantResp: testCleanResp(http.Header{"sun": {"masked_value"}}), //nolint:bodyclose
inErr: nil,
},
{
name: "url cleaned, some fields",
shouldLog: true,
inReq: testReq(t, nil, &url.URL{
Scheme: "sc",
Opaque: "",
User: nil,
Host: "ho",
Path: "pa",
RawPath: "rap",
ForceQuery: false,
RawQuery: "key3=val3&key4=val4",
Fragment: "",
RawFragment: "",
}),
wantReq: testCleanReq(nil, &url.URL{
Scheme: "sc",
Opaque: "",
User: nil,
Host: "ho",
Path: "pa",
RawPath: "rap",
ForceQuery: false,
RawQuery: "key3=masked_value&key4=masked_value",
Fragment: "",
RawFragment: "",
}),
inResp: testResp(t, http.Header{"sun": {"yellow"}}), //nolint:bodyclose
wantResp: testCleanResp(http.Header{"sun": {"masked_value"}}), //nolint:bodyclose
inErr: nil,
},
{
name: "header and url cleaned, all fields with error",
shouldLog: true,
inReq: testReq(t, http.Header{"zone": {"of", "the", "enders"}, "welcome": {"home"}}, &url.URL{
Scheme: "sc2",
Opaque: "op2",
User: url.UserPassword("us2", "pa2"),
Host: "ho2",
Path: "pa2",
RawPath: "rap2",
ForceQuery: true,
RawQuery: "a=b&c=d&e=f&a=1&a=2",
Fragment: "fra2",
RawFragment: "rawf2",
}),
wantReq: testCleanReq(http.Header{"zone": {"masked_value"}, "welcome": {"masked_value"}}, &url.URL{
Scheme: "sc2",
Opaque: "masked_opaque_data",
User: url.User("masked_username"),
Host: "ho2",
Path: "pa2",
RawPath: "rap2",
ForceQuery: true,
RawQuery: "a=masked_value&c=masked_value&e=masked_value",
Fragment: "masked_fragment",
RawFragment: "",
}),
inResp: testResp(t, http.Header{"moon": {"white"}}), //nolint:bodyclose
wantResp: testCleanResp(http.Header{"moon": {"masked_value"}}), //nolint:bodyclose
inErr: constable.Error("yay pandas"),
},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
var rtCalled, wrapCalled, innerCalled bool
rtFunc := roundtripper.Func(func(r *http.Request) (*http.Response, error) {
rtCalled = true
require.Equal(t, tt.inReq, r)
return tt.inResp, tt.inErr
})
var gotReq *http.Request
var gotResp *http.Response
var gotErr error
wrapFunc := func(rt http.RoundTripper) http.RoundTripper {
wrapCalled = true
return roundtripper.Func(func(r *http.Request) (*http.Response, error) {
innerCalled = true
gotReq = r
resp, err := rt.RoundTrip(r) //nolint:bodyclose
gotResp = resp
gotErr = err
return resp, err
})
}
out := safeDebugWrappers(rtFunc, wrapFunc, func() bool { return tt.shouldLog })
resp, err := out.RoundTrip(tt.inReq) //nolint:bodyclose
require.Equal(t, tt.inResp, resp)
require.Equal(t, tt.inErr, err)
require.True(t, rtCalled)
require.Equal(t, tt.shouldLog, wrapCalled)
require.Equal(t, tt.shouldLog, innerCalled)
require.Equal(t, tt.wantReq, gotReq)
require.Equal(t, tt.wantResp, gotResp)
require.Equal(t, tt.inErr, gotErr)
})
}
}
func testReq(t *testing.T, header http.Header, u *url.URL) *http.Request {
t.Helper()
r, err := http.NewRequestWithContext(context.Background(), http.MethodGet, "https://overwritten.com", nil)
require.NoError(t, err)
if u == nil {
u = &url.URL{}
}
r.URL = u
r.Header = header
// something non-nil for testing
r.Body = io.NopCloser(&bytes.Buffer{})
r.Form = url.Values{"a": {"b"}}
r.PostForm = url.Values{"c": {"d"}}
return r
}
func testResp(t *testing.T, header http.Header) *http.Response {
t.Helper()
return &http.Response{
Status: "pandas are the best",
Header: header,
// something non-nil for testing
Body: io.NopCloser(&bytes.Buffer{}),
Request: testReq(t, header, nil),
}
}
func testCleanReq(header http.Header, u *url.URL) *http.Request {
if u == nil {
u = &url.URL{}
}
return &http.Request{
Method: http.MethodGet,
URL: u,
Header: header,
}
}
func testCleanResp(header http.Header) *http.Response {
return &http.Response{
Status: "pandas are the best",
Header: header,
}
}

48
internal/net/phttp/phttp.go Normal file
View File

@ -0,0 +1,48 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package phttp
import (
"crypto/x509"
"net/http"
"time"
"k8s.io/apimachinery/pkg/util/net"
"k8s.io/client-go/rest"
"k8s.io/client-go/transport"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/plog"
)
func Default(rootCAs *x509.CertPool) *http.Client {
return buildClient(ptls.Default, rootCAs)
}
func Secure(rootCAs *x509.CertPool) *http.Client {
return buildClient(ptls.Secure, rootCAs)
}
func buildClient(tlsConfigFunc ptls.ConfigFunc, rootCAs *x509.CertPool) *http.Client {
baseRT := defaultTransport()
baseRT.TLSClientConfig = tlsConfigFunc(rootCAs)
return &http.Client{
Transport: defaultWrap(baseRT),
Timeout: 3 * time.Hour, // make it impossible for requests to hang indefinitely
}
}
func defaultTransport() *http.Transport {
baseRT := http.DefaultTransport.(*http.Transport).Clone()
net.SetTransportDefaults(baseRT)
baseRT.MaxIdleConnsPerHost = 25 // copied from client-go
return baseRT
}
func defaultWrap(rt http.RoundTripper) http.RoundTripper {
rt = safeDebugWrappers(rt, transport.DebugWrappers, func() bool { return plog.Enabled(plog.LevelTrace) })
rt = transport.NewUserAgentRoundTripper(rest.DefaultKubernetesUserAgent(), rt)
return rt
}

116
internal/net/phttp/phttp_test.go Normal file
View File

@ -0,0 +1,116 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package phttp
import (
"context"
"crypto/tls"
"crypto/x509"
"net/http"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"k8s.io/apimachinery/pkg/util/net"
"k8s.io/client-go/util/cert"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/testutil/tlsserver"
)
// TestUnwrap ensures that the http.Client structs returned by this package contain
// a transport that can be fully unwrapped to get access to the underlying TLS config.
func TestUnwrap(t *testing.T) {
t.Parallel()
tests := []struct {
name string
f func(*x509.CertPool) *http.Client
}{
{
name: "default",
f: Default,
},
{
name: "secure",
f: Secure,
},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
p, err := x509.SystemCertPool()
require.NoError(t, err)
c := tt.f(p)
tlsConfig, err := net.TLSClientConfig(c.Transport)
require.NoError(t, err)
require.NotNil(t, tlsConfig)
require.NotEmpty(t, tlsConfig.NextProtos)
require.GreaterOrEqual(t, tlsConfig.MinVersion, uint16(tls.VersionTLS12))
require.Equal(t, p, tlsConfig.RootCAs)
})
}
}
func TestClient(t *testing.T) {
t.Parallel()
tests := []struct {
name string
clientFunc func(*x509.CertPool) *http.Client
configFunc ptls.ConfigFunc
}{
{
name: "default",
clientFunc: Default,
configFunc: ptls.Default,
},
{
name: "secure",
clientFunc: Secure,
configFunc: ptls.Secure,
},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
var sawRequest bool
server := tlsserver.TLSTestServer(t, http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
tlsserver.AssertTLS(t, r, tt.configFunc)
assertUserAgent(t, r)
sawRequest = true
}), tlsserver.RecordTLSHello)
rootCAs, err := cert.NewPoolFromBytes(tlsserver.TLSTestServerCA(server))
require.NoError(t, err)
c := tt.clientFunc(rootCAs)
req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, server.URL, nil)
require.NoError(t, err)
resp, err := c.Do(req)
require.NoError(t, err)
require.NoError(t, resp.Body.Close())
require.True(t, sawRequest)
})
}
}
func assertUserAgent(t *testing.T, r *http.Request) {
t.Helper()
ua := r.Header.Get("user-agent")
// use assert instead of require to not break the http.Handler with a panic
assert.Contains(t, ua, ") kubernetes/")
}

6
internal/oidc/downstreamsession/downstream_session.go
View File

@ -9,7 +9,7 @@ import (
"net/url"
"time"
oidc2 "github.com/coreos/go-oidc/v3/oidc"
coreosoidc "github.com/coreos/go-oidc/v3/oidc"
"github.com/ory/fosite"
"github.com/ory/fosite/handler/openid"
"github.com/ory/fosite/token/jwt"
@ -60,8 +60,8 @@ func MakeDownstreamSession(subject string, username string, groups []string, cus
// GrantScopesIfRequested auto-grants the scopes for which we do not require end-user approval, if they were requested.
func GrantScopesIfRequested(authorizeRequester fosite.AuthorizeRequester) {
oidc.GrantScopeIfRequested(authorizeRequester, oidc2.ScopeOpenID)
oidc.GrantScopeIfRequested(authorizeRequester, oidc2.ScopeOfflineAccess)
oidc.GrantScopeIfRequested(authorizeRequester, coreosoidc.ScopeOpenID)
oidc.GrantScopeIfRequested(authorizeRequester, coreosoidc.ScopeOfflineAccess)
oidc.GrantScopeIfRequested(authorizeRequester, "pinniped:request-audience")
}

30
internal/plog/klog.go
View File

@ -33,7 +33,7 @@ func RemoveKlogGlobalFlags() {
}
}
// KRef is (mostly) copied from klog - it is a standard way to represent a a metav1.Object in logs
// KRef is (mostly) copied from klog - it is a standard way to represent a metav1.Object in logs
// when you only have access to the namespace and name of the object.
func KRef(namespace, name string) string {
return fmt.Sprintf("%s/%s", namespace, name)
@ -44,33 +44,19 @@ func KObj(obj klog.KMetadata) string {
return fmt.Sprintf("%s/%s", obj.GetNamespace(), obj.GetName())
}
func klogLevelForPlogLevel(plogLevel LogLevel) (klogLevel klog.Level) {
func klogLevelForPlogLevel(plogLevel LogLevel) klog.Level {
switch plogLevel {
case LevelWarning:
klogLevel = klogLevelWarning // unset means minimal logs (Error and Warning)
return klogLevelWarning // unset means minimal logs (Error and Warning)
case LevelInfo:
klogLevel = klogLevelInfo
return klogLevelInfo
case LevelDebug:
klogLevel = klogLevelDebug
return klogLevelDebug
case LevelTrace:
klogLevel = klogLevelTrace
return klogLevelTrace
case LevelAll:
klogLevel = klogLevelAll + 100 // make all really mean all
return klogLevelAll + 100 // make all really mean all
default:
klogLevel = -1
return -1
}
return
}
func getKlogLevel() klog.Level {
// hack around klog not exposing a Get method
for i := klog.Level(0); i < 256; i++ {
if klog.V(i).Enabled() {
continue
}
return i - 1
}
return -1
}

3
internal/plog/level.go
View File

@ -7,6 +7,7 @@ import (
"strconv"
"k8s.io/component-base/logs"
"k8s.io/klog/v2"
"go.pinniped.dev/internal/constable"
)
@ -54,5 +55,5 @@ func ValidateAndSetLogLevelGlobally(level LogLevel) error {
// Enabled returns whether the provided plog level is enabled, i.e., whether print statements at the
// provided level will show up.
func Enabled(level LogLevel) bool {
return getKlogLevel() >= klogLevelForPlogLevel(level)
return klog.V(klogLevelForPlogLevel(level)).Enabled()
}

12
internal/plog/level_test.go
View File

@ -114,3 +114,15 @@ func undoGlobalLogLevelChanges(t *testing.T, originalLogLevel klog.Level) {
_, err := logs.GlogSetter(strconv.Itoa(int(originalLogLevel)))
require.NoError(t, err)
}
func getKlogLevel() klog.Level {
// hack around klog not exposing a Get method
for i := klog.Level(0); i < 256; i++ {
if klog.V(i).Enabled() {
continue
}
return i - 1
}
return -1
}

62
internal/plog/plog.go
View File

@ -26,13 +26,11 @@
// act of desperation to determine why the system is broken.
package plog
import (
"k8s.io/klog/v2"
)
import "k8s.io/klog/v2"
const errorKey = "error"
type _ interface {
type Logger interface {
Error(msg string, err error, keysAndValues ...interface{})
Warning(msg string, keysAndValues ...interface{})
WarningErr(msg string, err error, keysAndValues ...interface{})
@ -45,23 +43,23 @@ type _ interface {
All(msg string, keysAndValues ...interface{})
}
type PLogger struct {
type pLogger struct {
prefix string
depth int
}
func New(prefix string) PLogger {
return PLogger{
func New(prefix string) Logger {
return &pLogger{
depth: 0,
prefix: prefix,
}
}
func (p *PLogger) Error(msg string, err error, keysAndValues ...interface{}) {
func (p *pLogger) Error(msg string, err error, keysAndValues ...interface{}) {
klog.ErrorSDepth(p.depth+1, err, p.prefix+msg, keysAndValues...)
}
func (p *PLogger) warningDepth(msg string, depth int, keysAndValues ...interface{}) {
func (p *pLogger) warningDepth(msg string, depth int, keysAndValues ...interface{}) {
// klog's structured logging has no concept of a warning (i.e. no WarningS function)
// Thus we use info at log level zero as a proxy
// klog's info logs have an I prefix and its warning logs have a W prefix
@ -72,111 +70,111 @@ func (p *PLogger) warningDepth(msg string, depth int, keysAndValues ...interface
}
}
func (p *PLogger) Warning(msg string, keysAndValues ...interface{}) {
func (p *pLogger) Warning(msg string, keysAndValues ...interface{}) {
p.warningDepth(msg, p.depth+1, keysAndValues...)
}
// Use WarningErr to issue a Warning message with an error object as part of the message.
func (p *PLogger) WarningErr(msg string, err error, keysAndValues ...interface{}) {
func (p *pLogger) WarningErr(msg string, err error, keysAndValues ...interface{}) {
p.warningDepth(msg, p.depth+1, append([]interface{}{errorKey, err}, keysAndValues...)...)
}
func (p *PLogger) infoDepth(msg string, depth int, keysAndValues ...interface{}) {
func (p *pLogger) infoDepth(msg string, depth int, keysAndValues ...interface{}) {
if klog.V(klogLevelInfo).Enabled() {
klog.InfoSDepth(depth+1, p.prefix+msg, keysAndValues...)
}
}
func (p *PLogger) Info(msg string, keysAndValues ...interface{}) {
func (p *pLogger) Info(msg string, keysAndValues ...interface{}) {
p.infoDepth(msg, p.depth+1, keysAndValues...)
}
// Use InfoErr to log an expected error, e.g. validation failure of an http parameter.
func (p *PLogger) InfoErr(msg string, err error, keysAndValues ...interface{}) {
func (p *pLogger) InfoErr(msg string, err error, keysAndValues ...interface{}) {
p.infoDepth(msg, p.depth+1, append([]interface{}{errorKey, err}, keysAndValues...)...)
}
func (p *PLogger) debugDepth(msg string, depth int, keysAndValues ...interface{}) {
func (p *pLogger) debugDepth(msg string, depth int, keysAndValues ...interface{}) {
if klog.V(klogLevelDebug).Enabled() {
klog.InfoSDepth(depth+1, p.prefix+msg, keysAndValues...)
}
}
func (p *PLogger) Debug(msg string, keysAndValues ...interface{}) {
func (p *pLogger) Debug(msg string, keysAndValues ...interface{}) {
p.debugDepth(msg, p.depth+1, keysAndValues...)
}
// Use DebugErr to issue a Debug message with an error object as part of the message.
func (p *PLogger) DebugErr(msg string, err error, keysAndValues ...interface{}) {
func (p *pLogger) DebugErr(msg string, err error, keysAndValues ...interface{}) {
p.debugDepth(msg, p.depth+1, append([]interface{}{errorKey, err}, keysAndValues...)...)
}
func (p *PLogger) traceDepth(msg string, depth int, keysAndValues ...interface{}) {
func (p *pLogger) traceDepth(msg string, depth int, keysAndValues ...interface{}) {
if klog.V(klogLevelTrace).Enabled() {
klog.InfoSDepth(depth+1, p.prefix+msg, keysAndValues...)
}
}
func (p *PLogger) Trace(msg string, keysAndValues ...interface{}) {
func (p *pLogger) Trace(msg string, keysAndValues ...interface{}) {
p.traceDepth(msg, p.depth+1, keysAndValues...)
}
// Use TraceErr to issue a Trace message with an error object as part of the message.
func (p *PLogger) TraceErr(msg string, err error, keysAndValues ...interface{}) {
func (p *pLogger) TraceErr(msg string, err error, keysAndValues ...interface{}) {
p.traceDepth(msg, p.depth+1, append([]interface{}{errorKey, err}, keysAndValues...)...)
}
func (p *PLogger) All(msg string, keysAndValues ...interface{}) {
func (p *pLogger) All(msg string, keysAndValues ...interface{}) {
if klog.V(klogLevelAll).Enabled() {
klog.InfoSDepth(p.depth+1, p.prefix+msg, keysAndValues...)
}
}
var pLogger = PLogger{ //nolint:gochecknoglobals
var logger Logger = &pLogger{ //nolint:gochecknoglobals
depth: 1,
}
// Use Error to log an unexpected system error.
func Error(msg string, err error, keysAndValues ...interface{}) {
pLogger.Error(msg, err, keysAndValues...)
logger.Error(msg, err, keysAndValues...)
}
func Warning(msg string, keysAndValues ...interface{}) {
pLogger.Warning(msg, keysAndValues...)
logger.Warning(msg, keysAndValues...)
}
// Use WarningErr to issue a Warning message with an error object as part of the message.
func WarningErr(msg string, err error, keysAndValues ...interface{}) {
pLogger.WarningErr(msg, err, keysAndValues...)
logger.WarningErr(msg, err, keysAndValues...)
}
func Info(msg string, keysAndValues ...interface{}) {
pLogger.Info(msg, keysAndValues...)
logger.Info(msg, keysAndValues...)
}
// Use InfoErr to log an expected error, e.g. validation failure of an http parameter.
func InfoErr(msg string, err error, keysAndValues ...interface{}) {
pLogger.InfoErr(msg, err, keysAndValues...)
logger.InfoErr(msg, err, keysAndValues...)
}
func Debug(msg string, keysAndValues ...interface{}) {
pLogger.Debug(msg, keysAndValues...)
logger.Debug(msg, keysAndValues...)
}
// Use DebugErr to issue a Debug message with an error object as part of the message.
func DebugErr(msg string, err error, keysAndValues ...interface{}) {
pLogger.DebugErr(msg, err, keysAndValues...)
logger.DebugErr(msg, err, keysAndValues...)
}
func Trace(msg string, keysAndValues ...interface{}) {
pLogger.Trace(msg, keysAndValues...)
logger.Trace(msg, keysAndValues...)
}
// Use TraceErr to issue a Trace message with an error object as part of the message.
func TraceErr(msg string, err error, keysAndValues ...interface{}) {
pLogger.TraceErr(msg, err, keysAndValues...)
logger.TraceErr(msg, err, keysAndValues...)
}
func All(msg string, keysAndValues ...interface{}) {
pLogger.All(msg, keysAndValues...)
logger.All(msg, keysAndValues...)
}

32
internal/supervisor/server/server.go
View File

@ -41,6 +41,7 @@ import (
"go.pinniped.dev/internal/controller/supervisorstorage"
"go.pinniped.dev/internal/controllerinit"
"go.pinniped.dev/internal/controllerlib"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/deploymentref"
"go.pinniped.dev/internal/downward"
"go.pinniped.dev/internal/groupsuffix"
@ -392,23 +393,22 @@ func runSupervisor(podInfo *downward.PodInfo, cfg *supervisor.Config) error {
defer func() { _ = httpListener.Close() }()
startServer(ctx, shutdown, httpListener, oidProvidersManager)
c := ptls.Default(nil)
c.GetCertificate = func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
cert := dynamicTLSCertProvider.GetTLSCert(strings.ToLower(info.ServerName))
defaultCert := dynamicTLSCertProvider.GetDefaultTLSCert()
plog.Debug("GetCertificate called for port 8443",
"info.ServerName", info.ServerName,
"foundSNICert", cert != nil,
"foundDefaultCert", defaultCert != nil,
)
if cert == nil {
cert = defaultCert
}
return cert, nil
}
//nolint: gosec // Intentionally binding to all network interfaces.
httpsListener, err := tls.Listen("tcp", ":8443", &tls.Config{
MinVersion: tls.VersionTLS12, // Allow v1.2 because clients like the default `curl` on MacOS don't support 1.3 yet.
GetCertificate: func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
cert := dynamicTLSCertProvider.GetTLSCert(strings.ToLower(info.ServerName))
defaultCert := dynamicTLSCertProvider.GetDefaultTLSCert()
plog.Debug("GetCertificate called for port 8443",
"info.ServerName", info.ServerName,
"foundSNICert", cert != nil,
"foundDefaultCert", defaultCert != nil,
)
if cert == nil {
cert = defaultCert
}
return cert, nil
},
})
httpsListener, err := tls.Listen("tcp", ":8443", c)
if err != nil {
return fmt.Errorf("cannot create listener: %w", err)
}

11
internal/testutil/fakekubeapi/fakekubeapi.go
View File

@ -18,7 +18,6 @@
package fakekubeapi
import (
"encoding/pem"
"fmt"
"io/ioutil"
"mime"
@ -37,7 +36,9 @@ import (
pinnipedconciergeclientsetscheme "go.pinniped.dev/generated/latest/client/concierge/clientset/versioned/scheme"
pinnipedsupervisorclientsetscheme "go.pinniped.dev/generated/latest/client/supervisor/clientset/versioned/scheme"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/httputil/httperr"
"go.pinniped.dev/internal/testutil/tlsserver"
)
// Start starts an httptest.Server (with TLS) that pretends to be a Kube API server.
@ -54,7 +55,9 @@ func Start(t *testing.T, resources map[string]runtime.Object) (*httptest.Server,
resources = make(map[string]runtime.Object)
}
server := httptest.NewTLSServer(httperr.HandlerFunc(func(w http.ResponseWriter, r *http.Request) (err error) {
server := tlsserver.TLSTestServer(t, httperr.HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
tlsserver.AssertTLS(t, r, ptls.Secure)
obj, err := decodeObj(r)
if err != nil {
return err
@ -74,11 +77,11 @@ func Start(t *testing.T, resources map[string]runtime.Object) (*httptest.Server,
}
return nil
}))
}), tlsserver.RecordTLSHello)
restConfig := &restclient.Config{
Host: server.URL,
TLSClientConfig: restclient.TLSClientConfig{
CAData: pem.EncodeToMemory(&pem.Block{Bytes: server.Certificate().Raw, Type: "CERTIFICATE"}),
CAData: tlsserver.TLSTestServerCA(server),
},
}
return server, restConfig

27
internal/testutil/tlsserver.go
View File

@ -5,39 +5,36 @@ package testutil
import (
"crypto/tls"
"encoding/pem"
"errors"
"net"
"net/http"
"net/http/httptest"
"testing"
"github.com/stretchr/testify/require"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/testutil/tlsserver"
)
// TLSTestServer starts a test server listening on a local port using a test CA. It returns the PEM CA bundle and the
// URL of the listening server. The lifetime of the server is bound to the provided *testing.T.
func TLSTestServer(t *testing.T, handler http.HandlerFunc) (caBundlePEM string, url string) {
func TLSTestServer(t *testing.T, handler http.HandlerFunc) (caBundlePEM, url string) {
t.Helper()
server := httptest.NewTLSServer(handler)
t.Cleanup(server.Close)
caBundle := string(pem.EncodeToMemory(&pem.Block{
Type: "CERTIFICATE",
Bytes: server.TLS.Certificates[0].Certificate[0],
}))
return caBundle, server.URL
server := tlsserver.TLSTestServer(t, handler, nil)
return string(tlsserver.TLSTestServerCA(server)), server.URL
}
func TLSTestServerWithCert(t *testing.T, handler http.HandlerFunc, certificate *tls.Certificate) (url string) {
t.Helper()
c := ptls.Default(nil) // mimic API server config
c.Certificates = []tls.Certificate{*certificate}
server := http.Server{
TLSConfig: &tls.Config{
Certificates: []tls.Certificate{*certificate},
MinVersion: tls.VersionTLS12,
},
Handler: handler,
TLSConfig: c,
Handler: handler,
}
l, err := net.Listen("tcp", "127.0.0.1:0")

110
internal/testutil/tlsserver/tlsserver.go Normal file
View File

@ -0,0 +1,110 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package tlsserver
import (
"context"
"crypto/tls"
"encoding/pem"
"fmt"
"net"
"net/http"
"net/http/httptest"
"reflect"
"sync"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"k8s.io/apimachinery/pkg/util/httpstream"
"go.pinniped.dev/internal/crypto/ptls"
)
type ctxKey int
const (
mapKey ctxKey = iota + 1
helloKey
)
func TLSTestServer(t *testing.T, handler http.Handler, f func(*httptest.Server)) *httptest.Server {
t.Helper()
server := httptest.NewUnstartedServer(handler)
server.TLS = ptls.Default(nil) // mimic API server config
if f != nil {
f(server)
}
server.StartTLS()
t.Cleanup(server.Close)
return server
}
func TLSTestServerCA(server *httptest.Server) []byte {
return pem.EncodeToMemory(&pem.Block{
Type: "CERTIFICATE",
Bytes: server.Certificate().Raw,
})
}
func RecordTLSHello(server *httptest.Server) {
server.Config.ConnContext = func(ctx context.Context, _ net.Conn) context.Context {
return context.WithValue(ctx, mapKey, &sync.Map{})
}
server.TLS.GetConfigForClient = func(info *tls.ClientHelloInfo) (*tls.Config, error) {
m, ok := getCtxMap(info.Context())
if !ok {
return nil, fmt.Errorf("could not find ctx map")
}
if actual, loaded := m.LoadOrStore(helloKey, info); loaded && !reflect.DeepEqual(info, actual) {
return nil, fmt.Errorf("different client hello seen")
}
return nil, nil
}
}
func AssertTLS(t *testing.T, r *http.Request, tlsConfigFunc ptls.ConfigFunc) {
t.Helper()
m, ok := getCtxMap(r.Context())
require.True(t, ok)
h, ok := m.Load(helloKey)
require.True(t, ok)
info, ok := h.(*tls.ClientHelloInfo)
require.True(t, ok)
tlsConfig := tlsConfigFunc(nil)
supportedVersions := []uint16{tlsConfig.MinVersion}
ciphers := tlsConfig.CipherSuites
if secureTLSConfig := ptls.Secure(nil); tlsConfig.MinVersion != secureTLSConfig.MinVersion {
supportedVersions = append([]uint16{secureTLSConfig.MinVersion}, supportedVersions...)
ciphers = append(ciphers, secureTLSConfig.CipherSuites...)
}
protos := tlsConfig.NextProtos
if httpstream.IsUpgradeRequest(r) {
protos = tlsConfig.NextProtos[1:]
}
// use assert instead of require to not break the http.Handler with a panic
ok1 := assert.Equal(t, supportedVersions, info.SupportedVersions)
ok2 := assert.Equal(t, ciphers, info.CipherSuites)
ok3 := assert.Equal(t, protos, info.SupportedProtos)
if all := ok1 && ok2 && ok3; !all {
t.Errorf("insecure TLS detected for %q %q %q upgrade=%v supportedVersions=%v ciphers=%v protos=%v",
r.Proto, r.Method, r.URL.String(), httpstream.IsUpgradeRequest(r), ok1, ok2, ok3)
}
}
func getCtxMap(ctx context.Context) (*sync.Map, bool) {
m, ok := ctx.Value(mapKey).(*sync.Map)
return m, ok
}

3
internal/upstreamldap/upstreamldap.go
View File

@ -25,6 +25,7 @@ import (
"k8s.io/utils/trace"
"go.pinniped.dev/internal/authenticators"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/endpointaddr"
"go.pinniped.dev/internal/oidc/downstreamsession"
"go.pinniped.dev/internal/oidc/provider"
@ -328,7 +329,7 @@ func (p *Provider) tlsConfig() (*tls.Config, error) {
return nil, fmt.Errorf("could not parse CA bundle")
}
}
return &tls.Config{MinVersion: tls.VersionTLS12, RootCAs: rootCAs}, nil
return ptls.DefaultLDAP(rootCAs), nil
}
// A name for this upstream provider.

33
internal/upstreamldap/upstreamldap_test.go
View File

@ -11,6 +11,7 @@ import (
"fmt"
"net"
"net/http"
"net/http/httptest"
"net/url"
"testing"
"time"
@ -22,9 +23,11 @@ import (
"go.pinniped.dev/internal/authenticators"
"go.pinniped.dev/internal/certauthority"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/endpointaddr"
"go.pinniped.dev/internal/mocks/mockldapconn"
"go.pinniped.dev/internal/testutil"
"go.pinniped.dev/internal/testutil/tlsserver"
)
const (
@ -1689,10 +1692,22 @@ func TestGetURL(t *testing.T) {
// Testing of host parsing, TLS negotiation, and CA bundle, etc. for the production code's dialer.
func TestRealTLSDialing(t *testing.T) {
testServerCABundle, testServerURL := testutil.TLSTestServer(t, func(w http.ResponseWriter, r *http.Request) {})
parsedURL, err := url.Parse(testServerURL)
testServer := tlsserver.TLSTestServer(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}),
func(server *httptest.Server) {
tlsserver.RecordTLSHello(server)
recordFunc := server.TLS.GetConfigForClient
server.TLS.GetConfigForClient = func(info *tls.ClientHelloInfo) (*tls.Config, error) {
_, _ = recordFunc(info)
r, err := http.NewRequestWithContext(info.Context(), http.MethodGet, "/this-is-ldap", nil)
require.NoError(t, err)
tlsserver.AssertTLS(t, r, ptls.DefaultLDAP)
return nil, nil
}
})
parsedURL, err := url.Parse(testServer.URL)
require.NoError(t, err)
testServerHostAndPort := parsedURL.Host
testServerCABundle := tlsserver.TLSTestServerCA(testServer)
caForTestServerWithBadCertName, err := certauthority.New("Test CA", time.Hour)
require.NoError(t, err)
@ -1720,7 +1735,7 @@ func TestRealTLSDialing(t *testing.T) {
{
name: "happy path",
host: testServerHostAndPort,
caBundle: []byte(testServerCABundle),
caBundle: testServerCABundle,
connProto: TLS,
context: context.Background(),
},
@ -1751,7 +1766,7 @@ func TestRealTLSDialing(t *testing.T) {
{
name: "invalid host with TLS",
host: "this:is:not:a:valid:hostname",
caBundle: []byte(testServerCABundle),
caBundle: testServerCABundle,
connProto: TLS,
context: context.Background(),
wantError: `LDAP Result Code 200 "Network Error": host "this:is:not:a:valid:hostname" is not a valid hostname or IP address`,
@ -1759,7 +1774,7 @@ func TestRealTLSDialing(t *testing.T) {
{
name: "invalid host with StartTLS",
host: "this:is:not:a:valid:hostname",
caBundle: []byte(testServerCABundle),
caBundle: testServerCABundle,
connProto: StartTLS,
context: context.Background(),
wantError: `LDAP Result Code 200 "Network Error": host "this:is:not:a:valid:hostname" is not a valid hostname or IP address`,
@ -1776,7 +1791,7 @@ func TestRealTLSDialing(t *testing.T) {
name: "cannot connect to host",
// This is assuming that this port was not reclaimed by another app since the test setup ran. Seems safe enough.
host: recentlyClaimedHostAndPort,
caBundle: []byte(testServerCABundle),
caBundle: testServerCABundle,
connProto: TLS,
context: context.Background(),
wantError: fmt.Sprintf(`LDAP Result Code 200 "Network Error": dial tcp %s: connect: connection refused`, recentlyClaimedHostAndPort),
@ -1784,7 +1799,7 @@ func TestRealTLSDialing(t *testing.T) {
{
name: "pays attention to the passed context",
host: testServerHostAndPort,
caBundle: []byte(testServerCABundle),
caBundle: testServerCABundle,
connProto: TLS,
context: alreadyCancelledContext,
wantError: fmt.Sprintf(`LDAP Result Code 200 "Network Error": dial tcp %s: operation was canceled`, testServerHostAndPort),
@ -1792,7 +1807,7 @@ func TestRealTLSDialing(t *testing.T) {
{
name: "unsupported connection protocol",
host: testServerHostAndPort,
caBundle: []byte(testServerCABundle),
caBundle: testServerCABundle,
connProto: "bad usage of this type",
context: alreadyCancelledContext,
wantError: `LDAP Result Code 200 "Network Error": did not specify valid ConnectionProtocol`,
@ -1824,7 +1839,7 @@ func TestRealTLSDialing(t *testing.T) {
// Indirectly checking that the Dialer method constructed the ldap.Conn with isTLS set to true,
// since this is always the correct behavior unless/until we want to support StartTLS.
err := conn.(*ldap.Conn).StartTLS(&tls.Config{})
err := conn.(*ldap.Conn).StartTLS(ptls.DefaultLDAP(nil))
require.EqualError(t, err, `LDAP Result Code 200 "Network Error": ldap: already encrypted`)
}
})

3
pkg/oidcclient/login.go
View File

@ -31,6 +31,7 @@ import (
supervisoroidc "go.pinniped.dev/generated/latest/apis/supervisor/oidc"
"go.pinniped.dev/internal/httputil/httperr"
"go.pinniped.dev/internal/httputil/securityheader"
"go.pinniped.dev/internal/net/phttp"
"go.pinniped.dev/internal/oidc/provider"
"go.pinniped.dev/internal/upstreamoidc"
"go.pinniped.dev/pkg/oidcclient/nonce"
@ -274,7 +275,7 @@ func Login(issuer string, clientID string, opts ...Option) (*oidctypes.Token, er
ctx: context.Background(),
logger: logr.Discard(), // discard logs unless a logger is specified
callbacks: make(chan callbackResult, 2),
httpClient: http.DefaultClient,
httpClient: phttp.Default(nil),
// Default implementations of external dependencies (to be mocked in tests).
generateState: state.Generate,

9
test/integration/cli_test.go
View File

@ -108,7 +108,14 @@ func TestCLIGetKubeconfigStaticToken_Parallel(t *testing.T) {
})
}
func runPinnipedCLI(t *testing.T, envVars []string, pinnipedExe string, args ...string) (string, string) {
type testingT interface {
Helper()
Errorf(format string, args ...interface{})
FailNow()
Logf(format string, args ...interface{})
}
func runPinnipedCLI(t testingT, envVars []string, pinnipedExe string, args ...string) (string, string) {
t.Helper()
start := time.Now()
var stdout, stderr bytes.Buffer

6
test/integration/concierge_credentialrequest_test.go
View File

@ -45,8 +45,10 @@ func TestUnsuccessfulCredentialRequest_Parallel(t *testing.T) {
require.Equal(t, "authentication failed", *response.Status.Message)
}
// TCRs are non-mutating and safe to run in parallel with serial tests, see main_test.go.
func TestSuccessfulCredentialRequest_Parallel(t *testing.T) {
// TestSuccessfulCredentialRequest cannot run in parallel because runPinnipedLoginOIDC uses a fixed port
// for its localhost listener via --listen-port=env.CLIUpstreamOIDC.CallbackURL.Port() per oidcLoginCommand.
// Since ports are global to the process, tests using oidcLoginCommand must be run serially.
func TestSuccessfulCredentialRequest(t *testing.T) {
env := testlib.IntegrationEnv(t).WithCapability(testlib.ClusterSigningKeyIsAvailable)
ctx, cancel := context.WithTimeout(context.Background(), 6*time.Minute)

67
test/integration/concierge_impersonation_proxy_test.go
View File

@ -65,6 +65,7 @@ import (
identityv1alpha1 "go.pinniped.dev/generated/latest/apis/concierge/identity/v1alpha1"
loginv1alpha1 "go.pinniped.dev/generated/latest/apis/concierge/login/v1alpha1"
pinnipedconciergeclientset "go.pinniped.dev/generated/latest/client/concierge/clientset/versioned"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/httputil/roundtripper"
"go.pinniped.dev/internal/kubeclient"
"go.pinniped.dev/internal/testutil"
@ -305,20 +306,18 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
Verb: "get", Group: "", Version: "v1", Resource: "namespaces",
})
// Get pods in concierge namespace and pick one.
// this is for tests that require performing actions against a running pod. We use the concierge pod because we already have it handy.
// We want to make sure it's a concierge pod (not cert agent), because we need to be able to port-forward a running port.
pods, err := adminClient.CoreV1().Pods(env.ConciergeNamespace).List(ctx, metav1.ListOptions{})
// Get pods in supervisor namespace and pick one.
// this is for tests that require performing actions against a running pod.
// We use the supervisor pod because we already have it handy and need to port-forward a running port.
// We avoid using the concierge for this because it requires TLS 1.3 which is not support by older versions of curl.
supervisorPods, err := adminClient.CoreV1().Pods(env.SupervisorNamespace).List(ctx,
metav1.ListOptions{LabelSelector: "deployment.pinniped.dev=supervisor"})
require.NoError(t, err)
require.Greater(t, len(pods.Items), 0)
var conciergePod *corev1.Pod
for _, pod := range pods.Items {
pod := pod
if !strings.Contains(pod.Name, "kube-cert-agent") {
conciergePod = &pod
}
}
require.NotNil(t, conciergePod, "could not find a concierge pod")
require.NotEmpty(t, supervisorPods.Items, "could not find supervisor pods")
supervisorPod := supervisorPods.Items[0]
// make sure the supervisor has a default TLS cert during this test so that it can handle a TLS connection
_ = createTLSCertificateSecret(ctx, t, env.SupervisorNamespace, "cert-hostname-doesnt-matter", nil, defaultTLSCertSecretName(env), adminClient)
// Test that the user can perform basic actions through the client with their username and group membership
// influencing RBAC checks correctly.
@ -346,7 +345,7 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
// Run the kubectl port-forward command.
timeout, cancelFunc := context.WithTimeout(ctx, 2*time.Minute)
defer cancelFunc()
portForwardCmd, _, portForwardStderr := kubectlCommand(timeout, t, kubeconfigPath, envVarsWithProxy, "port-forward", "--namespace", env.ConciergeNamespace, conciergePod.Name, "10443:8443")
portForwardCmd, _, portForwardStderr := kubectlCommand(timeout, t, kubeconfigPath, envVarsWithProxy, "port-forward", "--namespace", supervisorPod.Namespace, supervisorPod.Name, "10443:8443")
portForwardCmd.Env = envVarsWithProxy
// Start, but don't wait for the command to finish.
@ -366,7 +365,7 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
defer cancelFunc()
startTime := time.Now()
for time.Now().Before(startTime.Add(70 * time.Second)) {
curlCmd := exec.CommandContext(timeout, "curl", "-k", "-sS", "https://127.0.0.1:10443") // -sS turns off the progressbar but still prints errors
curlCmd := exec.CommandContext(timeout, "curl", "-k", "-sS", "https://127.0.0.1:10443/healthz") // -sS turns off the progressbar but still prints errors
curlCmd.Stdout = &curlStdOut
curlCmd.Stderr = &curlStdErr
curlErr := curlCmd.Run()
@ -382,7 +381,7 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
// curl the endpoint once more, once 70 seconds has elapsed, to make sure the connection is still open.
timeout, cancelFunc = context.WithTimeout(ctx, 30*time.Second)
defer cancelFunc()
curlCmd := exec.CommandContext(timeout, "curl", "-k", "-sS", "https://127.0.0.1:10443") // -sS turns off the progressbar but still prints errors
curlCmd := exec.CommandContext(timeout, "curl", "-k", "-sS", "https://127.0.0.1:10443/healthz") // -sS turns off the progressbar but still prints errors
curlCmd.Stdout = &curlStdOut
curlCmd.Stderr = &curlStdErr
curlErr := curlCmd.Run()
@ -392,9 +391,8 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
t.Log("curlStdErr: " + curlStdErr.String())
t.Log("stdout: " + curlStdOut.String())
}
// We expect this to 403, but all we care is that it gets through.
require.NoError(t, curlErr)
require.Contains(t, curlStdOut.String(), `"forbidden: User \"system:anonymous\" cannot get path \"/\""`)
require.Contains(t, curlStdOut.String(), "okokokokok") // a few successful healthz responses
})
t.Run("kubectl port-forward and keeping the connection open for over a minute (idle)", func(t *testing.T) {
@ -404,7 +402,7 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
// Run the kubectl port-forward command.
timeout, cancelFunc := context.WithTimeout(ctx, 2*time.Minute)
defer cancelFunc()
portForwardCmd, _, portForwardStderr := kubectlCommand(timeout, t, kubeconfigPath, envVarsWithProxy, "port-forward", "--namespace", env.ConciergeNamespace, conciergePod.Name, "10444:8443")
portForwardCmd, _, portForwardStderr := kubectlCommand(timeout, t, kubeconfigPath, envVarsWithProxy, "port-forward", "--namespace", supervisorPod.Namespace, supervisorPod.Name, "10444:8443")
portForwardCmd.Env = envVarsWithProxy
// Start, but don't wait for the command to finish.
@ -414,13 +412,13 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
assert.EqualErrorf(t, portForwardCmd.Wait(), "signal: killed", `wanted "kubectl port-forward" to get signaled because context was cancelled (stderr: %q)`, portForwardStderr.String())
}()
// Wait to see if we time out. The default timeout is 60 seconds, but the server should recognize this this
// Wait to see if we time out. The default timeout is 60 seconds, but the server should recognize that this
// is going to be a long-running command and keep the connection open as long as the client stays connected.
time.Sleep(70 * time.Second)
timeout, cancelFunc = context.WithTimeout(ctx, 2*time.Minute)
defer cancelFunc()
curlCmd := exec.CommandContext(timeout, "curl", "-k", "-sS", "https://127.0.0.1:10444") // -sS turns off the progressbar but still prints errors
curlCmd := exec.CommandContext(timeout, "curl", "-k", "-sS", "https://127.0.0.1:10444/healthz") // -sS turns off the progressbar but still prints errors
var curlStdOut, curlStdErr bytes.Buffer
curlCmd.Stdout = &curlStdOut
curlCmd.Stderr = &curlStdErr
@ -430,9 +428,8 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
t.Log("curlStdErr: " + curlStdErr.String())
t.Log("stdout: " + curlStdOut.String())
}
// We expect this to 403, but all we care is that it gets through.
require.NoError(t, err)
require.Contains(t, curlStdOut.String(), `"forbidden: User \"system:anonymous\" cannot get path \"/\""`)
require.Equal(t, curlStdOut.String(), "ok")
})
t.Run("using and watching all the basic verbs", func(t *testing.T) {
@ -760,7 +757,7 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
clusterAdminCredentials, impersonationProxyURL, impersonationProxyCACertPEM, nil,
)
nestedImpersonationUIDOnly.Wrap(func(rt http.RoundTripper) http.RoundTripper {
return roundtripper.Func(func(r *http.Request) (*http.Response, error) {
return roundtripper.WrapFunc(rt, func(r *http.Request) (*http.Response, error) {
r.Header.Set("iMperSONATE-uid", "some-awesome-uid")
return rt.RoundTrip(r)
})
@ -798,7 +795,7 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
},
)
nestedImpersonationUID.Wrap(func(rt http.RoundTripper) http.RoundTripper {
return roundtripper.Func(func(r *http.Request) (*http.Response, error) {
return roundtripper.WrapFunc(rt, func(r *http.Request) (*http.Response, error) {
r.Header.Set("imperSONate-uiD", "some-fancy-uid")
return rt.RoundTrip(r)
})
@ -1115,7 +1112,7 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
// run the kubectl logs command
logLinesCount := 10
stdout, err = runKubectl(t, kubeconfigPath, envVarsWithProxy, "logs", "--namespace", conciergePod.Namespace, conciergePod.Name, fmt.Sprintf("--tail=%d", logLinesCount))
stdout, err = runKubectl(t, kubeconfigPath, envVarsWithProxy, "logs", "--namespace", supervisorPod.Namespace, supervisorPod.Name, fmt.Sprintf("--tail=%d", logLinesCount))
require.NoError(t, err, `"kubectl logs" failed`)
// Expect _approximately_ logLinesCount lines in the output
// (we can't match 100% exactly due to https://github.com/kubernetes/kubernetes/issues/72628).
@ -1500,6 +1497,20 @@ func TestImpersonationProxy(t *testing.T) { //nolint:gocyclo // yeah, it's compl
})
})
})
t.Run("assert impersonator runs with secure TLS config", func(t *testing.T) {
parallelIfNotEKS(t)
cancelCtx, cancel := context.WithCancel(ctx)
t.Cleanup(cancel)
startKubectlPortForward(cancelCtx, t, "10445", "443", env.ConciergeAppName+"-proxy", env.ConciergeNamespace)
stdout, stderr := runNmapSSLEnum(t, "127.0.0.1", 10445)
require.Empty(t, stderr)
require.Contains(t, stdout, getExpectedCiphers(ptls.Default), "stdout:\n%s", stdout)
})
})
t.Run("assert correct impersonator service account is being used", func(t *testing.T) {
@ -1956,7 +1967,7 @@ func performImpersonatorDiscovery(ctx context.Context, t *testing.T, env *testli
// probe each pod directly for readiness since the concierge status is a lie - it just means a single pod is ready
testlib.RequireEventually(t, func(requireEventually *require.Assertions) {
pods, err := adminClient.CoreV1().Pods(env.ConciergeNamespace).List(ctx,
metav1.ListOptions{LabelSelector: "app=" + env.ConciergeAppName + ",!kube-cert-agent.pinniped.dev"}) // TODO replace with deployment.pinniped.dev=concierge
metav1.ListOptions{LabelSelector: "deployment.pinniped.dev=concierge"})
requireEventually.NoError(err)
requireEventually.Len(pods.Items, 2) // has to stay in sync with the defaults in our YAML
@ -2373,7 +2384,7 @@ func getCredForConfig(t *testing.T, config *rest.Config) *loginv1alpha1.ClusterC
config = rest.CopyConfig(config)
config.Wrap(func(rt http.RoundTripper) http.RoundTripper {
return roundtripper.Func(func(req *http.Request) (*http.Response, error) {
return roundtripper.WrapFunc(rt, func(req *http.Request) (*http.Response, error) {
resp, err := rt.RoundTrip(req)
r := req

2
test/integration/ldap_client_test.go
View File

@ -759,8 +759,6 @@ func startLongRunningCommandAndWaitForInitialOutput(
cmd := exec.CommandContext(ctx, command, args...)
var stdoutBuf, stderrBuf syncBuffer
cmd.Stdout = &stdoutBuf
cmd.Stderr = &stderrBuf
cmd.Stdout = io.MultiWriter(os.Stdout, &stdoutBuf)
cmd.Stderr = io.MultiWriter(os.Stderr, &stderrBuf)

257
test/integration/securetls_test.go Normal file
View File

@ -0,0 +1,257 @@
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package integration
import (
"bytes"
"context"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"fmt"
"net/http"
"os/exec"
"regexp"
"sort"
"strconv"
"strings"
"testing"
"time"
"github.com/stretchr/testify/require"
"go.pinniped.dev/internal/crypto/ptls"
"go.pinniped.dev/internal/testutil/tlsserver"
"go.pinniped.dev/test/testlib"
)
// TLS checks safe to run in parallel with serial tests, see main_test.go.
func TestSecureTLSPinnipedCLIToKAS_Parallel(t *testing.T) {
_ = testlib.IntegrationEnv(t)
server := tlsserver.TLSTestServer(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
tlsserver.AssertTLS(t, r, ptls.Secure) // pinniped CLI uses ptls.Secure when talking to KAS
w.Header().Set("content-type", "application/json")
fmt.Fprint(w, `{"kind":"TokenCredentialRequest","apiVersion":"login.concierge.pinniped.dev/v1alpha1",`+
`"status":{"credential":{"token":"some-fancy-token"}}}`)
}), tlsserver.RecordTLSHello)
ca := tlsserver.TLSTestServerCA(server)
pinnipedExe := testlib.PinnipedCLIPath(t)
stdout, stderr := runPinnipedCLI(t, nil, pinnipedExe, "login", "static",
"--token", "does-not-matter",
"--concierge-authenticator-type", "webhook",
"--concierge-authenticator-name", "does-not-matter",
"--concierge-ca-bundle-data", base64.StdEncoding.EncodeToString(ca),
"--concierge-endpoint", server.URL,
"--enable-concierge",
"--credential-cache", "",
)
require.Empty(t, stderr)
require.Equal(t, `{"kind":"ExecCredential","apiVersion":"client.authentication.k8s.io/v1beta1",`+
`"spec":{"interactive":false},"status":{"expirationTimestamp":null,"token":"some-fancy-token"}}
`, stdout)
}
// TLS checks safe to run in parallel with serial tests, see main_test.go.
func TestSecureTLSPinnipedCLIToSupervisor_Parallel(t *testing.T) {
_ = testlib.IntegrationEnv(t)
server := tlsserver.TLSTestServer(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
tlsserver.AssertTLS(t, r, ptls.Default) // pinniped CLI uses ptls.Default when talking to supervisor
w.Header().Set("content-type", "application/json")
fmt.Fprint(w, `{"issuer":"https://not-a-good-issuer"}`)
}), tlsserver.RecordTLSHello)
ca := tlsserver.TLSTestServerCA(server)
pinnipedExe := testlib.PinnipedCLIPath(t)
stdout, stderr := runPinnipedCLI(&fakeT{T: t}, nil, pinnipedExe, "login", "oidc",
"--ca-bundle-data", base64.StdEncoding.EncodeToString(ca),
"--issuer", server.URL,
"--credential-cache", "",
"--upstream-identity-provider-flow", "cli_password",
"--upstream-identity-provider-name", "does-not-matter",
"--upstream-identity-provider-type", "oidc",
)
require.Equal(t, `Error: could not complete Pinniped login: could not perform OIDC discovery for "`+
server.URL+`": oidc: issuer did not match the issuer returned by provider, expected "`+
server.URL+`" got "https://not-a-good-issuer"
`, stderr)
require.Empty(t, stdout)
}
// TLS checks safe to run in parallel with serial tests, see main_test.go.
func TestSecureTLSConciergeAggregatedAPI_Parallel(t *testing.T) {
env := testlib.IntegrationEnv(t)
cancelCtx, cancel := context.WithCancel(context.Background())
t.Cleanup(cancel)
startKubectlPortForward(cancelCtx, t, "10446", "443", env.ConciergeAppName+"-api", env.ConciergeNamespace)
stdout, stderr := runNmapSSLEnum(t, "127.0.0.1", 10446)
require.Empty(t, stderr)
require.Contains(t, stdout, getExpectedCiphers(ptls.Secure), "stdout:\n%s", stdout)
}
func TestSecureTLSSupervisor(t *testing.T) { // does not run in parallel because of the createTLSCertificateSecret call
env := testlib.IntegrationEnv(t)
ctx, cancel := context.WithCancel(context.Background())
t.Cleanup(cancel)
adminClient := testlib.NewKubernetesClientset(t)
// make sure the supervisor has a default TLS cert during this test so that it can handle a TLS connection
_ = createTLSCertificateSecret(ctx, t, env.SupervisorNamespace, "cert-hostname-doesnt-matter", nil, defaultTLSCertSecretName(env), adminClient)
startKubectlPortForward(ctx, t, "10447", "443", env.SupervisorAppName+"-clusterip", env.SupervisorNamespace)
stdout, stderr := runNmapSSLEnum(t, "127.0.0.1", 10447)
// supervisor's cert is ECDSA
defaultECDSAOnly := func(rootCAs *x509.CertPool) *tls.Config {
c := ptls.Default(rootCAs)
ciphers := make([]uint16, 0, len(c.CipherSuites)/2)
for _, id := range c.CipherSuites {
id := id
if !strings.Contains(tls.CipherSuiteName(id), "_ECDSA_") {
continue
}
ciphers = append(ciphers, id)
}
c.CipherSuites = ciphers
return c
}
require.Empty(t, stderr)
require.Contains(t, stdout, getExpectedCiphers(defaultECDSAOnly), "stdout:\n%s", stdout)
}
type fakeT struct {
*testing.T
}
func (t *fakeT) FailNow() {
t.Errorf("fakeT ignored FailNow")
}
func (t *fakeT) Errorf(format string, args ...interface{}) {
t.Cleanup(func() {
if !t.Failed() {
return
}
t.Logf("reporting previously ignored errors since main test failed:\n"+format, args...)
})
}
func runNmapSSLEnum(t *testing.T, host string, port uint16) (string, string) {
t.Helper()
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
version, err := exec.CommandContext(ctx, "nmap", "-V").CombinedOutput()
require.NoError(t, err)
versionMatches := regexp.MustCompile(`Nmap version 7\.(?P<minor>\d+)`).FindStringSubmatch(string(version))
require.Len(t, versionMatches, 2)
minorVersion, err := strconv.Atoi(versionMatches[1])
require.NoError(t, err)
require.GreaterOrEqual(t, minorVersion, 92, "nmap >= 7.92.x is required")
var stdout, stderr bytes.Buffer
//nolint:gosec // we are not performing malicious argument injection against ourselves
cmd := exec.CommandContext(ctx, "nmap", "--script", "ssl-enum-ciphers",
"-p", strconv.FormatUint(uint64(port), 10),
host,
)
cmd.Stdout = &stdout
cmd.Stderr = &stderr
require.NoErrorf(t, cmd.Run(), "stderr:\n%s\n\nstdout:\n%s\n\n", stderr.String(), stdout.String())
return stdout.String(), stderr.String()
}
func getExpectedCiphers(configFunc ptls.ConfigFunc) string {
config := configFunc(nil)
secureConfig := ptls.Secure(nil)
skip12 := config.MinVersion == secureConfig.MinVersion
var tls12Bit, tls13Bit string
if !skip12 {
sort.SliceStable(config.CipherSuites, func(i, j int) bool {
a := tls.CipherSuiteName(config.CipherSuites[i])
b := tls.CipherSuiteName(config.CipherSuites[j])
ok1 := strings.Contains(a, "_ECDSA_")
ok2 := strings.Contains(b, "_ECDSA_")
if ok1 && ok2 {
return false
}
return ok1
})
var s strings.Builder
for i, id := range config.CipherSuites {
s.WriteString(fmt.Sprintf(tls12Item, tls.CipherSuiteName(id)))
if i == len(config.CipherSuites)-1 {
break
}
s.WriteString("\n")
}
tls12Bit = fmt.Sprintf(tls12Base, s.String())
}
var s strings.Builder
for i, id := range secureConfig.CipherSuites {
s.WriteString(fmt.Sprintf(tls13Item, strings.Replace(tls.CipherSuiteName(id), "TLS_", "TLS_AKE_WITH_", 1)))
if i == len(secureConfig.CipherSuites)-1 {
break
}
s.WriteString("\n")
}
tls13Bit = fmt.Sprintf(tls13Base, s.String())
return fmt.Sprintf(baseItem, tls12Bit, tls13Bit)
}
const (
// this surrounds the tls 1.2 and 1.3 text in a way that guarantees that other TLS versions are not supported.
baseItem = `/tcp open unknown
| ssl-enum-ciphers: %s%s
|_ least strength: A
Nmap done: 1 IP address (1 host up) scanned in`
// the "cipher preference: client" bit a bug in nmap.
// https://github.com/nmap/nmap/issues/1691#issuecomment-536919978
tls12Base = `
| TLSv1.2:
| ciphers:
%s
| compressors:
| NULL
| cipher preference: client`
tls13Base = `
| TLSv1.3:
| ciphers:
%s
| cipher preference: server`
tls12Item = `| %s (secp256r1) - A`
tls13Item = `| %s (ecdh_x25519) - A`
)

2
test/testlib/client.go
View File

@ -132,7 +132,7 @@ func newClientsetWithConfig(t *testing.T, config *rest.Config) kubernetes.Interf
func NewAnonymousClientRestConfig(t *testing.T) *rest.Config {
t.Helper()
return rest.AnonymousClientConfig(NewClientConfig(t))
return kubeclient.SecureAnonymousClientConfig(NewClientConfig(t))
}
// Starting with an anonymous client config, add a cert and key to use for authentication in the API server.