open-consul/agent/connect/x509_patch_test.go

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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package connect
import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"math/big"
"testing"
)
var testPrivateKey_x509 *rsa.PrivateKey
func TestX509_EmptySubject(t *testing.T) {
// NOTE: this test is lifted straight out of the stdlib with no changes. to
// show that the cert-only workflow is fine.
template := x509.Certificate{
SerialNumber: big.NewInt(1),
DNSNames: []string{"example.com"},
}
derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &testPrivateKey_x509.PublicKey, testPrivateKey_x509)
if err != nil {
t.Fatalf("failed to create certificate: %s", err)
}
cert, err := x509.ParseCertificate(derBytes)
if err != nil {
t.Fatalf("failed to parse certificate: %s", err)
}
for _, ext := range cert.Extensions {
if ext.Id.Equal(x509_oidExtensionSubjectAltName) {
if !ext.Critical {
t.Fatal("SAN extension is not critical")
}
return
}
}
t.Fatal("SAN extension is missing")
}
func TestX509_EmptySubjectInCSR(t *testing.T) {
// NOTE: the CSR-only workflow is flawed so we hack around it
for _, tc := range []struct {
name string
hack bool
expectCritical bool
}{
{name: "unmodified stdlib",
hack: false,
expectCritical: false,
},
{name: "hacked stdlib",
hack: true,
expectCritical: true,
},
} {
t.Run(tc.name, func(t *testing.T) {
template := x509.CertificateRequest{
DNSNames: []string{"example.com"},
}
if tc.hack {
HackSANExtensionForCSR(&template)
}
derBytes, err := x509.CreateCertificateRequest(rand.Reader, &template, testPrivateKey_x509)
if err != nil {
t.Fatalf("failed to create certificate request: %s", err)
}
csr, err := x509.ParseCertificateRequest(derBytes)
if err != nil {
t.Fatalf("failed to parse certificate request: %s", err)
}
for _, ext := range csr.Extensions {
if ext.Id.Equal(x509_oidExtensionSubjectAltName) {
if tc.expectCritical {
if !ext.Critical {
t.Fatal("SAN extension is not critical")
}
} else {
if ext.Critical {
t.Fatal("SAN extension is critical now; maybe we don't need the hack anymore with this version of Go?")
}
}
return
}
}
t.Fatal("SAN extension is missing")
})
}
}
func init() {
block, _ := pem.Decode([]byte(pemPrivateKey_x509))
var err error
testPrivateKey_x509, err = x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
panic(err)
}
}
var pemPrivateKey_x509 = `
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
`