209 lines
7.5 KiB
Go
209 lines
7.5 KiB
Go
/*
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Copyright 2020 The cert-manager 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 pki
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import (
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"crypto"
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"crypto/rand"
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"crypto/x509"
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"crypto/x509/pkix"
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"reflect"
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"testing"
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"time"
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)
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type testBundle struct {
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cert *x509.Certificate
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pem []byte
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pk crypto.PrivateKey
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}
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func mustCreateBundle(t *testing.T, issuer *testBundle, name string) *testBundle {
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pk, err := GenerateECPrivateKey(256)
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if err != nil {
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t.Fatal(err)
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}
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serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
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if err != nil {
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t.Fatal(err)
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}
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template := &x509.Certificate{
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Version: 3,
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BasicConstraintsValid: true,
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SerialNumber: serialNumber,
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PublicKeyAlgorithm: x509.ECDSA,
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PublicKey: pk.Public(),
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IsCA: true,
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Subject: pkix.Name{
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CommonName: name,
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},
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NotBefore: time.Now(),
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NotAfter: time.Now().Add(time.Minute),
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KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
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}
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var (
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issuerKey crypto.PrivateKey
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issuerCert *x509.Certificate
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)
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if issuer == nil {
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// No issuer implies the cert should be self signed
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issuerKey = pk
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issuerCert = template
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} else {
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issuerKey = issuer.pk
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issuerCert = issuer.cert
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}
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certPEM, cert, err := SignCertificate(template, issuerCert, pk.Public(), issuerKey)
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if err != nil {
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t.Fatal(err)
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}
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return &testBundle{pem: certPEM, cert: cert, pk: pk}
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}
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func joinPEM(first []byte, rest ...[]byte) []byte {
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for _, b := range rest {
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first = append(first, b...)
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}
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return first
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}
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func TestParseSingleCertificateChain(t *testing.T) {
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root := mustCreateBundle(t, nil, "root")
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intA1 := mustCreateBundle(t, root, "intA-1")
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intA2 := mustCreateBundle(t, intA1, "intA-2")
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intB1 := mustCreateBundle(t, root, "intB-1")
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intB2 := mustCreateBundle(t, intB1, "intB-2")
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leaf := mustCreateBundle(t, intA2, "leaf")
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leafInterCN := mustCreateBundle(t, intA2, intA2.cert.Subject.CommonName)
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random := mustCreateBundle(t, nil, "random")
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tests := map[string]struct {
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inputBundle []byte
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expPEMBundle PEMBundle
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expErr bool
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}{
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"if two certificate chain passed in order, should return single ca and certificate": {
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inputBundle: joinPEM(intA1.pem, root.pem),
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expPEMBundle: PEMBundle{ChainPEM: intA1.pem, CAPEM: root.pem},
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expErr: false,
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},
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"if two certificate chain passed with leaf and intermediate, should return both certs in chain with intermediate as CA": {
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inputBundle: joinPEM(leaf.pem, intA2.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(leaf.pem, intA2.pem), CAPEM: intA2.pem},
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expErr: false,
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},
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"if two certificate chain passed out of order, should return single ca and certificate": {
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inputBundle: joinPEM(root.pem, intA1.pem),
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expPEMBundle: PEMBundle{ChainPEM: intA1.pem, CAPEM: root.pem},
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expErr: false,
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},
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"if 3 certificate chain passed out of order, should return single ca and chain in order": {
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inputBundle: joinPEM(root.pem, intA2.pem, intA1.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(intA2.pem, intA1.pem), CAPEM: root.pem},
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expErr: false,
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},
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"empty entries should be ignored, and return ca and certificate": {
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inputBundle: joinPEM(root.pem, intA2.pem, []byte("\n#foo\n \n"), intA1.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(intA2.pem, intA1.pem), CAPEM: root.pem},
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expErr: false,
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},
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"if 4 certificate chain passed in order, should return single ca and chain in order": {
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inputBundle: joinPEM(leaf.pem, intA1.pem, intA2.pem, root.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(leaf.pem, intA2.pem, intA1.pem), CAPEM: root.pem},
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expErr: false,
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},
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"if certificate chain has two certs with the same CN, shouldn't affect output": {
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// see https://github.com/cert-manager/cert-manager/issues/4142
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inputBundle: joinPEM(leafInterCN.pem, intA1.pem, intA2.pem, root.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(leafInterCN.pem, intA2.pem, intA1.pem), CAPEM: root.pem},
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expErr: false,
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},
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"if 4 certificate chain passed out of order, should return single ca and chain in order": {
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inputBundle: joinPEM(root.pem, intA1.pem, leaf.pem, intA2.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(leaf.pem, intA2.pem, intA1.pem), CAPEM: root.pem},
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expErr: false,
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},
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"if 3 certificate chain but has break in the chain, should return error": {
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inputBundle: joinPEM(root.pem, intA1.pem, leaf.pem),
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expPEMBundle: PEMBundle{},
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expErr: true,
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},
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"if 4 certificate chain but also random certificate, should return error": {
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inputBundle: joinPEM(root.pem, intA1.pem, leaf.pem, intA2.pem, random.pem),
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expPEMBundle: PEMBundle{},
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expErr: true,
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},
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"if 6 certificate chain but some are duplicates, duplicates should be removed and return single ca with chain": {
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inputBundle: joinPEM(intA2.pem, intA1.pem, root.pem, leaf.pem, intA1.pem, root.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(leaf.pem, intA2.pem, intA1.pem), CAPEM: root.pem},
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expErr: false,
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},
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"if 6 certificate chain in different configuration but some are duplicates, duplicates should be removed and return single ca with chain": {
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inputBundle: joinPEM(root.pem, intA1.pem, intA2.pem, leaf.pem, root.pem, intA1.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(leaf.pem, intA2.pem, intA1.pem), CAPEM: root.pem},
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expErr: false,
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},
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"if certificate chain contains branches, then should error": {
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inputBundle: joinPEM(root.pem, intA1.pem, intA2.pem, intB1.pem, intB2.pem),
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expPEMBundle: PEMBundle{},
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expErr: true,
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},
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"if certificate chain does not have a root ca, should append all intermediates to ChainPEM and use the root-most cert as CAPEM": {
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inputBundle: joinPEM(intA1.pem, intA2.pem, leaf.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(leaf.pem, intA2.pem, intA1.pem), CAPEM: intA1.pem},
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expErr: false,
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},
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"if only a single leaf certificate was parsed, ChainPEM should contain a single leaf certificate and CAPEM should remain empty": {
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inputBundle: joinPEM(leaf.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(leaf.pem), CAPEM: nil},
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expErr: false,
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},
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"if only a single intermediate certificate was parsed, ChainPEM should contain a single intermediate certificate and CAPEM should remain empty": {
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inputBundle: joinPEM(intA1.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(intA1.pem), CAPEM: nil},
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expErr: false,
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},
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"if only a single root certificate was parsed, ChainPEM should contain a single root certificate and CAPEM should also contain that root": {
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inputBundle: joinPEM(root.pem),
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expPEMBundle: PEMBundle{ChainPEM: joinPEM(root.pem), CAPEM: root.pem},
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expErr: false,
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},
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}
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for name, test := range tests {
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t.Run(name, func(t *testing.T) {
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bundle, err := ParseSingleCertificateChainPEM(test.inputBundle)
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if (err != nil) != test.expErr {
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t.Errorf("unexpected error, exp=%t got=%v",
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test.expErr, err)
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}
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if !reflect.DeepEqual(bundle, test.expPEMBundle) {
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t.Errorf("unexpected pem bundle, exp=%+s got=%+s",
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test.expPEMBundle, bundle)
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}
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})
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}
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}
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