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ldap_upstream_watcher.go: decode and validate CertificateAuthorityData

This commit is contained in:
Ryan Richard 2021-04-13 17:16:57 -07:00
parent 51263a0f07
commit 14ff5ee4ff
4 changed files with 295 additions and 12 deletions
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58
internal/controller/supervisorconfig/upstreamwatcher/ldap_upstream_watcher.go
View File

@ -5,6 +5,8 @@ package upstreamwatcher
import (
"context"
"crypto/x509"
"encoding/base64"
"fmt"
corev1 "k8s.io/api/core/v1"
@ -28,7 +30,10 @@ const (
ldapBindAccountSecretType = corev1.SecretTypeBasicAuth
// Constants related to conditions.
typeBindSecretValid = "BindSecretValid"
typeBindSecretValid = "BindSecretValid"
tlsConfigurationValid = "TLSConfigurationValid"
noTLSConfigurationMessage = "no TLS configuration provided"
loadedTLSConfigurationMessage = "loaded TLS configuration"
)
// UpstreamLDAPIdentityProviderICache is a thread safe cache that holds a list of validated upstream LDAP IDP configurations.
@ -101,10 +106,10 @@ func (c *ldapWatcherController) Sync(ctx controllerlib.Context) error {
func (c *ldapWatcherController) validateUpstream(ctx context.Context, upstream *v1alpha1.LDAPIdentityProvider) provider.UpstreamLDAPIdentityProviderI {
spec := upstream.Spec
result := &upstreamldap.Provider{
Name: upstream.Name,
Host: spec.Host,
CABundle: []byte(spec.TLS.CertificateAuthorityData),
Name: upstream.Name,
Host: spec.Host,
UserSearch: &upstreamldap.UserSearch{
Base: spec.UserSearch.Base,
Filter: spec.UserSearch.Filter,
@ -115,6 +120,7 @@ func (c *ldapWatcherController) validateUpstream(ctx context.Context, upstream *
}
conditions := []*v1alpha1.Condition{
c.validateSecret(upstream, result),
c.validateTLSConfig(upstream, result),
}
hadErrorCondition := c.updateStatus(ctx, upstream, conditions)
if hadErrorCondition {
@ -123,7 +129,49 @@ func (c *ldapWatcherController) validateUpstream(ctx context.Context, upstream *
return result
}
func (c ldapWatcherController) validateSecret(upstream *v1alpha1.LDAPIdentityProvider, result *upstreamldap.Provider) *v1alpha1.Condition {
func (c *ldapWatcherController) validateTLSConfig(upstream *v1alpha1.LDAPIdentityProvider, result *upstreamldap.Provider) *v1alpha1.Condition {
tlsSpec := upstream.Spec.TLS
if tlsSpec == nil {
return c.validTLSCondition(noTLSConfigurationMessage)
}
if len(tlsSpec.CertificateAuthorityData) == 0 {
return c.validTLSCondition(loadedTLSConfigurationMessage)
}
bundle, err := base64.StdEncoding.DecodeString(tlsSpec.CertificateAuthorityData)
if err != nil {
return c.invalidTLSCondition(fmt.Sprintf("certificateAuthorityData is invalid: %s", err.Error()))
}
ca := x509.NewCertPool()
ok := ca.AppendCertsFromPEM(bundle)
if !ok {
return c.invalidTLSCondition(fmt.Sprintf("certificateAuthorityData is invalid: %s", errNoCertificates))
}
result.CABundle = bundle
return c.validTLSCondition(loadedTLSConfigurationMessage)
}
func (c *ldapWatcherController) validTLSCondition(message string) *v1alpha1.Condition {
return &v1alpha1.Condition{
Type: tlsConfigurationValid,
Status: v1alpha1.ConditionTrue,
Reason: reasonSuccess,
Message: message,
}
}
func (c *ldapWatcherController) invalidTLSCondition(message string) *v1alpha1.Condition {
return &v1alpha1.Condition{
Type: tlsConfigurationValid,
Status: v1alpha1.ConditionFalse,
Reason: reasonInvalidTLSConfig,
Message: message,
}
}
func (c *ldapWatcherController) validateSecret(upstream *v1alpha1.LDAPIdentityProvider, result *upstreamldap.Provider) *v1alpha1.Condition {
secretName := upstream.Spec.Bind.SecretName
secret, err := c.secretInformer.Lister().Secrets(upstream.Namespace).Get(secretName)

245
internal/controller/supervisorconfig/upstreamwatcher/ldap_upstream_watcher_test.go
View File

@ -5,6 +5,7 @@ package upstreamwatcher
import (
"context"
"encoding/base64"
"fmt"
"sort"
"testing"
@ -20,6 +21,7 @@ import (
"go.pinniped.dev/generated/latest/apis/supervisor/idp/v1alpha1"
pinnipedfake "go.pinniped.dev/generated/latest/client/supervisor/clientset/versioned/fake"
pinnipedinformers "go.pinniped.dev/generated/latest/client/supervisor/informers/externalversions"
"go.pinniped.dev/internal/certauthority"
"go.pinniped.dev/internal/controllerlib"
"go.pinniped.dev/internal/oidc/provider"
"go.pinniped.dev/internal/testutil"
@ -150,15 +152,18 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
testBindUsername = "test-bind-username"
testBindPassword = "test-bind-password"
testHost = "ldap.example.com:123"
testCABundle = "test-ca-bundle"
testUserSearchBase = "test-user-search-base"
testUserSearchFilter = "test-user-search-filter"
testUsernameAttrName = "test-username-attr"
testUIDAttrName = "test-uid-attr"
)
var (
testValidSecretData = map[string][]byte{"username": []byte(testBindUsername), "password": []byte(testBindPassword)}
)
testValidSecretData := map[string][]byte{"username": []byte(testBindUsername), "password": []byte(testBindPassword)}
testCA, err := certauthority.New("test CA", time.Minute)
require.NoError(t, err)
testCABundle := testCA.Bundle()
testCABundleBase64Encoded := base64.StdEncoding.EncodeToString(testCABundle)
successfulDialer := &comparableDialer{
f: func(ctx context.Context, hostAndPort string) (upstreamldap.Conn, error) {
@ -171,7 +176,7 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
ObjectMeta: metav1.ObjectMeta{Name: testName, Namespace: testNamespace, Generation: 1234},
Spec: v1alpha1.LDAPIdentityProviderSpec{
Host: testHost,
TLS: &v1alpha1.LDAPIdentityProviderTLSSpec{CertificateAuthorityData: testCABundle},
TLS: &v1alpha1.LDAPIdentityProviderTLSSpec{CertificateAuthorityData: testCABundleBase64Encoded},
Bind: v1alpha1.LDAPIdentityProviderBindSpec{SecretName: testSecretName},
UserSearch: v1alpha1.LDAPIdentityProviderUserSearchSpec{
Base: testUserSearchBase,
@ -192,7 +197,7 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
providerForValidUpstream := &upstreamldap.Provider{
Name: testName,
Host: testHost,
CABundle: []byte(testCABundle),
CABundle: testCABundle,
BindUsername: testBindUsername,
BindPassword: testBindPassword,
UserSearch: &upstreamldap.UserSearch{
@ -239,6 +244,14 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
Message: "loaded bind secret",
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded TLS configuration",
ObservedGeneration: 1234,
},
},
},
}},
@ -263,6 +276,14 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
Message: fmt.Sprintf(`secret "%s" not found`, testSecretName),
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded TLS configuration",
ObservedGeneration: 1234,
},
},
},
}},
@ -291,6 +312,14 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
Message: fmt.Sprintf(`referenced Secret "%s" has wrong type "some-other-type" (should be "kubernetes.io/basic-auth")`, testSecretName),
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded TLS configuration",
ObservedGeneration: 1234,
},
},
},
}},
@ -318,6 +347,194 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
Message: fmt.Sprintf(`referenced Secret "%s" is missing required keys ["username" "password"]`, testSecretName),
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded TLS configuration",
ObservedGeneration: 1234,
},
},
},
}},
},
{
name: "CertificateAuthorityData is not base64 encoded",
ldapDialer: successfulDialer,
inputUpstreams: []runtime.Object{modifiedCopyOfValidUpstream(func(upstream *v1alpha1.LDAPIdentityProvider) {
upstream.Spec.TLS.CertificateAuthorityData = "this-is-not-base64-encoded"
})},
inputSecrets: []runtime.Object{&corev1.Secret{
ObjectMeta: metav1.ObjectMeta{Name: testSecretName, Namespace: testNamespace},
Type: corev1.SecretTypeBasicAuth,
Data: testValidSecretData,
}},
wantErr: controllerlib.ErrSyntheticRequeue.Error(),
wantResultingCache: []*upstreamldap.Provider{},
wantResultingUpstreams: []v1alpha1.LDAPIdentityProvider{{
ObjectMeta: metav1.ObjectMeta{Namespace: testNamespace, Name: testName, Generation: 1234},
Status: v1alpha1.LDAPIdentityProviderStatus{
Phase: "Error",
Conditions: []v1alpha1.Condition{
{
Type: "BindSecretValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded bind secret",
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "False",
LastTransitionTime: now,
Reason: "InvalidTLSConfig",
Message: "certificateAuthorityData is invalid: illegal base64 data at input byte 4",
ObservedGeneration: 1234,
},
},
},
}},
},
{
name: "CertificateAuthorityData is not valid pem data",
ldapDialer: successfulDialer,
inputUpstreams: []runtime.Object{modifiedCopyOfValidUpstream(func(upstream *v1alpha1.LDAPIdentityProvider) {
upstream.Spec.TLS.CertificateAuthorityData = base64.StdEncoding.EncodeToString([]byte("this is not pem data"))
})},
inputSecrets: []runtime.Object{&corev1.Secret{
ObjectMeta: metav1.ObjectMeta{Name: testSecretName, Namespace: testNamespace},
Type: corev1.SecretTypeBasicAuth,
Data: testValidSecretData,
}},
wantErr: controllerlib.ErrSyntheticRequeue.Error(),
wantResultingCache: []*upstreamldap.Provider{},
wantResultingUpstreams: []v1alpha1.LDAPIdentityProvider{{
ObjectMeta: metav1.ObjectMeta{Namespace: testNamespace, Name: testName, Generation: 1234},
Status: v1alpha1.LDAPIdentityProviderStatus{
Phase: "Error",
Conditions: []v1alpha1.Condition{
{
Type: "BindSecretValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded bind secret",
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "False",
LastTransitionTime: now,
Reason: "InvalidTLSConfig",
Message: "certificateAuthorityData is invalid: no certificates found",
ObservedGeneration: 1234,
},
},
},
}},
},
{
name: "nil TLS configuration",
ldapDialer: successfulDialer,
inputUpstreams: []runtime.Object{modifiedCopyOfValidUpstream(func(upstream *v1alpha1.LDAPIdentityProvider) {
upstream.Spec.TLS = nil
})},
inputSecrets: []runtime.Object{&corev1.Secret{
ObjectMeta: metav1.ObjectMeta{Name: testSecretName, Namespace: testNamespace},
Type: corev1.SecretTypeBasicAuth,
Data: testValidSecretData,
}},
wantResultingCache: []*upstreamldap.Provider{
{
Name: testName,
Host: testHost,
CABundle: nil,
BindUsername: testBindUsername,
BindPassword: testBindPassword,
UserSearch: &upstreamldap.UserSearch{
Base: testUserSearchBase,
Filter: testUserSearchFilter,
UsernameAttribute: testUsernameAttrName,
UIDAttribute: testUIDAttrName,
},
Dialer: successfulDialer, // the dialer passed to the controller's constructor should have been passed through
},
},
wantResultingUpstreams: []v1alpha1.LDAPIdentityProvider{{
ObjectMeta: metav1.ObjectMeta{Namespace: testNamespace, Name: testName, Generation: 1234},
Status: v1alpha1.LDAPIdentityProviderStatus{
Phase: "Ready",
Conditions: []v1alpha1.Condition{
{
Type: "BindSecretValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded bind secret",
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "no TLS configuration provided",
ObservedGeneration: 1234,
},
},
},
}},
},
{
name: "non-nil TLS configuration with empty CertificateAuthorityData",
ldapDialer: successfulDialer,
inputUpstreams: []runtime.Object{modifiedCopyOfValidUpstream(func(upstream *v1alpha1.LDAPIdentityProvider) {
upstream.Spec.TLS.CertificateAuthorityData = ""
})},
inputSecrets: []runtime.Object{&corev1.Secret{
ObjectMeta: metav1.ObjectMeta{Name: testSecretName, Namespace: testNamespace},
Type: corev1.SecretTypeBasicAuth,
Data: testValidSecretData,
}},
wantResultingCache: []*upstreamldap.Provider{
{
Name: testName,
Host: testHost,
CABundle: nil,
BindUsername: testBindUsername,
BindPassword: testBindPassword,
UserSearch: &upstreamldap.UserSearch{
Base: testUserSearchBase,
Filter: testUserSearchFilter,
UsernameAttribute: testUsernameAttrName,
UIDAttribute: testUIDAttrName,
},
Dialer: successfulDialer, // the dialer passed to the controller's constructor should have been passed through
},
},
wantResultingUpstreams: []v1alpha1.LDAPIdentityProvider{{
ObjectMeta: metav1.ObjectMeta{Namespace: testNamespace, Name: testName, Generation: 1234},
Status: v1alpha1.LDAPIdentityProviderStatus{
Phase: "Ready",
Conditions: []v1alpha1.Condition{
{
Type: "BindSecretValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded bind secret",
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded TLS configuration",
ObservedGeneration: 1234,
},
},
},
}},
@ -351,6 +568,14 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
Message: fmt.Sprintf(`secret "%s" not found`, "non-existent-secret"),
ObservedGeneration: 42,
},
{
Type: "TLSConfigurationValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded TLS configuration",
ObservedGeneration: 42,
},
},
},
},
@ -367,6 +592,14 @@ func TestLDAPUpstreamWatcherControllerSync(t *testing.T) {
Message: "loaded bind secret",
ObservedGeneration: 1234,
},
{
Type: "TLSConfigurationValid",
Status: "True",
LastTransitionTime: now,
Reason: "Success",
Message: "loaded TLS configuration",
ObservedGeneration: 1234,
},
},
},
},

2
internal/upstreamldap/upstreamldap.go
View File

@ -60,7 +60,7 @@ type Provider struct {
// the default LDAP port will be used.
Host string
// PEM-encoded CA cert bundle to trust when connecting to the LDAP server.
// PEM-encoded CA cert bundle to trust when connecting to the LDAP server. Can be nil.
CABundle []byte
// BindUsername is the username to use when performing a bind with the upstream LDAP IDP.

2
internal/upstreamldap/upstreamldap_test.go
View File

@ -45,7 +45,9 @@ var (
func TestAuthenticateUser(t *testing.T) {
provider := func(editFunc func(p *Provider)) *Provider {
provider := &Provider{
Name: "some-provider-name",
Host: testHost,
CABundle: nil, // this field is only used by the production dialer, which is replaced by a mock for this test
BindUsername: testBindUsername,
BindPassword: testBindPassword,
UserSearch: &UserSearch{