658 lines
16 KiB
Go
658 lines
16 KiB
Go
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/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package genericapiserver
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import (
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"crypto/tls"
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"crypto/x509"
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"encoding/base64"
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"encoding/pem"
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"reflect"
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"strconv"
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"testing"
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"github.com/stretchr/testify/assert"
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"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
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"k8s.io/kubernetes/pkg/genericapiserver/options"
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utilcert "k8s.io/kubernetes/pkg/util/cert"
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"k8s.io/kubernetes/pkg/util/config"
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"k8s.io/kubernetes/pkg/version"
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)
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type TestCertSpec struct {
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host string
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names, ips []string // in certificate
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}
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type NamedTestCertSpec struct {
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TestCertSpec
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explicitNames []string // as --tls-sni-cert-key explicit names
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}
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func TestGetNamedCertificateMap(t *testing.T) {
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tests := []struct {
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certs []NamedTestCertSpec
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explicitNames []string
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expected map[string]int // name to certs[*] index
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errorString string
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}{
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{
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// empty certs
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expected: map[string]int{},
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},
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{
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// only one cert
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certs: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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},
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},
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},
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expected: map[string]int{
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"test.com": 0,
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},
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},
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{
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// ips are ignored
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certs: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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ips: []string{"1.2.3.4"},
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},
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},
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},
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expected: map[string]int{
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"test.com": 0,
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},
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},
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{
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// two certs with the same name
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certs: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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},
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},
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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},
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},
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},
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expected: map[string]int{
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"test.com": 0,
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},
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},
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{
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// two certs with different names
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certs: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test2.com",
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},
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},
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{
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TestCertSpec: TestCertSpec{
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host: "test1.com",
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},
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},
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},
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expected: map[string]int{
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"test1.com": 1,
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"test2.com": 0,
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},
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},
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{
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// two certs with the same name, explicit trumps
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certs: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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},
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},
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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},
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explicitNames: []string{"test.com"},
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},
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},
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expected: map[string]int{
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"test.com": 1,
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},
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},
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{
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// certs with partial overlap; ips are ignored
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certs: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "a",
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names: []string{"a.test.com", "test.com"},
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},
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},
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{
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TestCertSpec: TestCertSpec{
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host: "b",
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names: []string{"b.test.com", "test.com"},
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},
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},
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},
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expected: map[string]int{
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"a": 0, "b": 1,
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"a.test.com": 0, "b.test.com": 1,
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"test.com": 0,
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},
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},
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{
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// wildcards
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certs: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "a",
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names: []string{"a.test.com", "test.com"},
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},
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explicitNames: []string{"*.test.com", "test.com"},
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},
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{
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TestCertSpec: TestCertSpec{
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host: "b",
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names: []string{"b.test.com", "test.com"},
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},
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explicitNames: []string{"dev.test.com", "test.com"},
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}},
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expected: map[string]int{
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"test.com": 0,
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"*.test.com": 0,
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"dev.test.com": 1,
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},
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},
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}
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NextTest:
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for i, test := range tests {
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var namedTLSCerts []namedTlsCert
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bySignature := map[string]int{} // index in test.certs by cert signature
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for j, c := range test.certs {
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cert, err := createTestTLSCerts(c.TestCertSpec)
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if err != nil {
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t.Errorf("%d - failed to create cert %d: %v", i, j, err)
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continue NextTest
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}
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namedTLSCerts = append(namedTLSCerts, namedTlsCert{
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tlsCert: cert,
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names: c.explicitNames,
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})
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sig, err := certSignature(cert)
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if err != nil {
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t.Errorf("%d - failed to get signature for %d: %v", i, j, err)
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continue NextTest
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}
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bySignature[sig] = j
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}
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certMap, err := getNamedCertificateMap(namedTLSCerts)
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if err == nil && len(test.errorString) != 0 {
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t.Errorf("%d - expected no error, got: %v", i, err)
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} else if err != nil && err.Error() != test.errorString {
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t.Errorf("%d - expected error %q, got: %v", i, test.errorString, err)
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} else {
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got := map[string]int{}
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for name, cert := range certMap {
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x509Certs, err := x509.ParseCertificates(cert.Certificate[0])
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assert.NoError(t, err, "%d - invalid certificate for %q", i, name)
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assert.True(t, len(x509Certs) > 0, "%d - expected at least one x509 cert in tls cert for %q", i, name)
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got[name] = bySignature[x509CertSignature(x509Certs[0])]
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}
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assert.EqualValues(t, test.expected, got, "%d - wrong certificate map", i)
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}
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}
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}
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func TestServerRunWithSNI(t *testing.T) {
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tests := map[string]struct {
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Cert TestCertSpec
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SNICerts []NamedTestCertSpec
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ExpectedCertIndex int
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// passed in the client hello info, "localhost" if unset
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ServerName string
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// optional ip or hostname to pass to NewSelfClientConfig
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SelfClientBindAddressOverride string
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ExpectSelfClientError bool
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}{
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"only one cert": {
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Cert: TestCertSpec{
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host: "localhost",
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ips: []string{"127.0.0.1"},
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},
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ExpectedCertIndex: -1,
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},
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"cert with multiple alternate names": {
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Cert: TestCertSpec{
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host: "localhost",
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names: []string{"test.com"},
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ips: []string{"127.0.0.1"},
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},
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ExpectedCertIndex: -1,
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ServerName: "test.com",
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},
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"one SNI and the default cert with the same name": {
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Cert: TestCertSpec{
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host: "localhost",
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ips: []string{"127.0.0.1"},
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "localhost",
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},
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},
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},
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ExpectedCertIndex: 0,
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},
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"matching SNI cert": {
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Cert: TestCertSpec{
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host: "localhost",
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ips: []string{"127.0.0.1"},
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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},
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},
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},
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ExpectedCertIndex: 0,
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ServerName: "test.com",
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},
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"matching IP in SNI cert and the server cert": {
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// IPs must not be passed via SNI. Hence, the ServerName in the
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// HELLO packet is empty and the server should select the non-SNI cert.
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Cert: TestCertSpec{
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host: "localhost",
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ips: []string{"10.0.0.1", "127.0.0.1"},
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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ips: []string{"10.0.0.1"},
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},
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},
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},
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ExpectedCertIndex: -1,
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ServerName: "10.0.0.1",
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},
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"wildcards": {
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Cert: TestCertSpec{
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host: "localhost",
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ips: []string{"127.0.0.1"},
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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names: []string{"*.test.com"},
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},
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},
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},
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ExpectedCertIndex: 0,
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ServerName: "www.test.com",
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},
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"loopback: IP for loopback client on SNI cert": {
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Cert: TestCertSpec{
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host: "localhost",
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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ips: []string{"127.0.0.1"},
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},
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},
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},
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ExpectedCertIndex: -1,
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ExpectSelfClientError: true,
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},
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"loopback: IP for loopback client on server and SNI cert": {
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Cert: TestCertSpec{
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ips: []string{"127.0.0.1"},
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host: "localhost",
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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ips: []string{"127.0.0.1"},
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},
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},
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},
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ExpectedCertIndex: -1,
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},
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"loopback: bind to 0.0.0.0 => loopback uses localhost; localhost on server cert": {
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Cert: TestCertSpec{
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host: "localhost",
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "test.com",
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},
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},
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},
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ExpectedCertIndex: -1,
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SelfClientBindAddressOverride: "0.0.0.0",
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},
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"loopback: bind to 0.0.0.0 => loopback uses localhost; localhost on SNI cert": {
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Cert: TestCertSpec{
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host: "test.com",
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "localhost",
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},
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},
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},
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ExpectedCertIndex: 0,
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SelfClientBindAddressOverride: "0.0.0.0",
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},
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"loopback: bind to 0.0.0.0 => loopback uses localhost; localhost on server and SNI cert": {
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Cert: TestCertSpec{
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host: "localhost",
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},
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SNICerts: []NamedTestCertSpec{
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{
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TestCertSpec: TestCertSpec{
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host: "localhost",
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},
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},
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},
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ExpectedCertIndex: 0,
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SelfClientBindAddressOverride: "0.0.0.0",
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},
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}
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tempDir, err := ioutil.TempDir("", "")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(tempDir)
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|
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NextTest:
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||
|
|
for title, test := range tests {
|
||
|
|
// create server cert
|
||
|
|
serverCertBundleFile, serverKeyFile, err := createTestCertFiles(tempDir, test.Cert)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed to create server cert: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
ca, err := caCertFromBundle(serverCertBundleFile)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed to extract ca cert from server cert bundle: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
caCerts := []*x509.Certificate{ca}
|
||
|
|
|
||
|
|
// create SNI certs
|
||
|
|
var namedCertKeys []config.NamedCertKey
|
||
|
|
serverSig, err := certFileSignature(serverCertBundleFile, serverKeyFile)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed to get server cert signature: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
signatures := map[string]int{
|
||
|
|
serverSig: -1,
|
||
|
|
}
|
||
|
|
for j, c := range test.SNICerts {
|
||
|
|
certBundleFile, keyFile, err := createTestCertFiles(tempDir, c.TestCertSpec)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed to create SNI cert %d: %v", title, j, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
|
||
|
|
namedCertKeys = append(namedCertKeys, config.NamedCertKey{
|
||
|
|
KeyFile: keyFile,
|
||
|
|
CertFile: certBundleFile,
|
||
|
|
Names: c.explicitNames,
|
||
|
|
})
|
||
|
|
|
||
|
|
ca, err := caCertFromBundle(certBundleFile)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed to extract ca cert from SNI cert %d: %v", title, j, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
caCerts = append(caCerts, ca)
|
||
|
|
|
||
|
|
// store index in namedCertKeys with the signature as the key
|
||
|
|
sig, err := certFileSignature(certBundleFile, keyFile)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed get SNI cert %d signature: %v", title, j, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
signatures[sig] = j
|
||
|
|
}
|
||
|
|
|
||
|
|
stopCh := make(chan struct{})
|
||
|
|
|
||
|
|
// launch server
|
||
|
|
etcdserver, config, _ := setUp(t)
|
||
|
|
defer etcdserver.Terminate(t)
|
||
|
|
|
||
|
|
v := version.Get()
|
||
|
|
config.Version = &v
|
||
|
|
|
||
|
|
config.EnableIndex = true
|
||
|
|
_, err = config.ApplySecureServingOptions(&options.SecureServingOptions{
|
||
|
|
ServingOptions: options.ServingOptions{
|
||
|
|
BindAddress: net.ParseIP("127.0.0.1"),
|
||
|
|
BindPort: 6443,
|
||
|
|
},
|
||
|
|
ServerCert: options.GeneratableKeyCert{
|
||
|
|
CertKey: options.CertKey{
|
||
|
|
CertFile: serverCertBundleFile,
|
||
|
|
KeyFile: serverKeyFile,
|
||
|
|
},
|
||
|
|
},
|
||
|
|
SNICertKeys: namedCertKeys,
|
||
|
|
})
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed applying the SecureServingOptions: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
config.InsecureServingInfo = nil
|
||
|
|
|
||
|
|
s, err := config.Complete().New()
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed creating the server: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
|
||
|
|
// patch in a 0-port to enable auto port allocation
|
||
|
|
s.SecureServingInfo.BindAddress = "127.0.0.1:0"
|
||
|
|
|
||
|
|
if err := s.serveSecurely(stopCh); err != nil {
|
||
|
|
t.Errorf("%q - failed running the server: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
|
||
|
|
// load ca certificates into a pool
|
||
|
|
roots := x509.NewCertPool()
|
||
|
|
for _, caCert := range caCerts {
|
||
|
|
roots.AddCert(caCert)
|
||
|
|
}
|
||
|
|
|
||
|
|
// try to dial
|
||
|
|
addr := fmt.Sprintf("localhost:%d", s.effectiveSecurePort)
|
||
|
|
t.Logf("Dialing %s as %q", addr, test.ServerName)
|
||
|
|
conn, err := tls.Dial("tcp", addr, &tls.Config{
|
||
|
|
RootCAs: roots,
|
||
|
|
ServerName: test.ServerName, // used for SNI in the client HELLO packet
|
||
|
|
})
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed to connect: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
|
||
|
|
// check returned server certificate
|
||
|
|
sig := x509CertSignature(conn.ConnectionState().PeerCertificates[0])
|
||
|
|
gotCertIndex, found := signatures[sig]
|
||
|
|
if !found {
|
||
|
|
t.Errorf("%q - unknown signature returned from server: %s", title, sig)
|
||
|
|
}
|
||
|
|
if gotCertIndex != test.ExpectedCertIndex {
|
||
|
|
t.Errorf("%q - expected cert index %d, got cert index %d", title, test.ExpectedCertIndex, gotCertIndex)
|
||
|
|
}
|
||
|
|
|
||
|
|
conn.Close()
|
||
|
|
|
||
|
|
// check that the loopback client can connect
|
||
|
|
host := "127.0.0.1"
|
||
|
|
if len(test.SelfClientBindAddressOverride) != 0 {
|
||
|
|
host = test.SelfClientBindAddressOverride
|
||
|
|
}
|
||
|
|
config.SecureServingInfo.ServingInfo.BindAddress = net.JoinHostPort(host, strconv.Itoa(s.effectiveSecurePort))
|
||
|
|
cfg, err := config.SecureServingInfo.NewSelfClientConfig("some-token")
|
||
|
|
if test.ExpectSelfClientError {
|
||
|
|
if err == nil {
|
||
|
|
t.Errorf("%q - expected error creating loopback client config", title)
|
||
|
|
}
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed creating loopback client config: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
client, err := clientset.NewForConfig(cfg)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed to create loopback client: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
got, err := client.ServerVersion()
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("%q - failed to connect with loopback client: %v", title, err)
|
||
|
|
continue NextTest
|
||
|
|
}
|
||
|
|
if expected := &v; !reflect.DeepEqual(got, expected) {
|
||
|
|
t.Errorf("%q - loopback client didn't get correct version info: expected=%v got=%v", title, expected, got)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func parseIPList(ips []string) []net.IP {
|
||
|
|
var netIPs []net.IP
|
||
|
|
for _, ip := range ips {
|
||
|
|
netIPs = append(netIPs, net.ParseIP(ip))
|
||
|
|
}
|
||
|
|
return netIPs
|
||
|
|
}
|
||
|
|
|
||
|
|
func createTestTLSCerts(spec TestCertSpec) (tlsCert tls.Certificate, err error) {
|
||
|
|
certPem, keyPem, err := utilcert.GenerateSelfSignedCertKey(spec.host, parseIPList(spec.ips), spec.names)
|
||
|
|
if err != nil {
|
||
|
|
return tlsCert, err
|
||
|
|
}
|
||
|
|
|
||
|
|
tlsCert, err = tls.X509KeyPair(certPem, keyPem)
|
||
|
|
return tlsCert, err
|
||
|
|
}
|
||
|
|
|
||
|
|
func createTestCertFiles(dir string, spec TestCertSpec) (certFilePath, keyFilePath string, err error) {
|
||
|
|
certPem, keyPem, err := utilcert.GenerateSelfSignedCertKey(spec.host, parseIPList(spec.ips), spec.names)
|
||
|
|
if err != nil {
|
||
|
|
return "", "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
certFile, err := ioutil.TempFile(dir, "cert")
|
||
|
|
if err != nil {
|
||
|
|
return "", "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
keyFile, err := ioutil.TempFile(dir, "key")
|
||
|
|
if err != nil {
|
||
|
|
return "", "", err
|
||
|
|
}
|
||
|
|
|
||
|
|
_, err = certFile.Write(certPem)
|
||
|
|
if err != nil {
|
||
|
|
return "", "", err
|
||
|
|
}
|
||
|
|
certFile.Close()
|
||
|
|
|
||
|
|
_, err = keyFile.Write(keyPem)
|
||
|
|
if err != nil {
|
||
|
|
return "", "", err
|
||
|
|
}
|
||
|
|
keyFile.Close()
|
||
|
|
|
||
|
|
return certFile.Name(), keyFile.Name(), nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func caCertFromBundle(bundlePath string) (*x509.Certificate, error) {
|
||
|
|
pemData, err := ioutil.ReadFile(bundlePath)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// fetch last block
|
||
|
|
var block *pem.Block
|
||
|
|
for {
|
||
|
|
var nextBlock *pem.Block
|
||
|
|
nextBlock, pemData = pem.Decode(pemData)
|
||
|
|
if nextBlock == nil {
|
||
|
|
if block == nil {
|
||
|
|
return nil, fmt.Errorf("no certificate found in %q", bundlePath)
|
||
|
|
|
||
|
|
}
|
||
|
|
return x509.ParseCertificate(block.Bytes)
|
||
|
|
}
|
||
|
|
block = nextBlock
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func x509CertSignature(cert *x509.Certificate) string {
|
||
|
|
return base64.StdEncoding.EncodeToString(cert.Signature)
|
||
|
|
}
|
||
|
|
|
||
|
|
func certFileSignature(certFile, keyFile string) (string, error) {
|
||
|
|
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
return certSignature(cert)
|
||
|
|
}
|
||
|
|
|
||
|
|
func certSignature(cert tls.Certificate) (string, error) {
|
||
|
|
x509Certs, err := x509.ParseCertificates(cert.Certificate[0])
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
return x509CertSignature(x509Certs[0]), nil
|
||
|
|
}
|