mirror of https://github.com/knative/pkg.git
91 lines
2.5 KiB
Go
91 lines
2.5 KiB
Go
/*
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Copyright 2018 The Knative 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 webhook
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import (
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"context"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"testing"
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"github.com/google/go-cmp/cmp"
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)
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func TestCreateCerts(t *testing.T) {
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sKey, serverCertPEM, caCertBytes, err := CreateCerts(context.TODO(), "got-the-hook", "knative-webhook")
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if err != nil {
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t.Fatalf("Failed to create certs %v", err)
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}
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// Test server private key
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p, _ := pem.Decode(sKey)
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if p.Type != "RSA PRIVATE KEY" {
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t.Fatal("Expected the key to be RSA Private key type")
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}
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key, err := x509.ParsePKCS1PrivateKey(p.Bytes)
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if err != nil {
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t.Fatalf("Failed to parse private key %v", err)
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}
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if err := key.Validate(); err != nil {
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t.Fatalf("Failed to validate private key")
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}
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// Test Server Cert
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sCert, err := validCertificate(serverCertPEM, t)
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if err != nil {
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t.Fatal(err)
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}
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// Test CA Cert
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caParsedCert, err := validCertificate(caCertBytes, t)
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if err != nil {
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t.Fatal(err)
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}
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// Verify domain names
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expectedDNSNames := []string{
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"got-the-hook.knative-webhook",
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"got-the-hook.knative-webhook.svc",
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"got-the-hook.knative-webhook.svc.cluster.local",
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}
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if diff := cmp.Diff(caParsedCert.DNSNames, expectedDNSNames); diff != "" {
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t.Fatalf("Unexpected CA Cert DNS Name (-want +got) : %v", diff)
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}
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// Verify Server Cert is Signed by CA Cert
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if err = sCert.CheckSignatureFrom(caParsedCert); err != nil {
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t.Fatal("Failed to verify that the signature on server certificate is from parent CA cert", err)
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}
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}
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func validCertificate(cert []byte, t *testing.T) (*x509.Certificate, error) {
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t.Helper()
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caCert, _ := pem.Decode(cert)
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if caCert.Type != "CERTIFICATE" {
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return nil, fmt.Errorf("Expected %s but got %s", "CERTIFICATE", caCert.Type)
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}
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parsedCert, err := x509.ParseCertificate(caCert.Bytes)
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if err != nil {
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return nil, fmt.Errorf("Failed to parse cert %v", err)
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}
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if parsedCert.SignatureAlgorithm != x509.SHA256WithRSA {
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return nil, fmt.Errorf("Failed to match signature. Expect %s but got %s", x509.SHA256WithRSA, parsedCert.SignatureAlgorithm)
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}
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return parsedCert, nil
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}
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