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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package testing
import (
"bytes"
"crypto/x509"
"testing"
"time"
"github.com/google/go-sev-guest/abi"
"github.com/google/go-sev-guest/kds"
"github.com/google/uuid"
)
func TestCertificatesParse(t *testing.T) {
signer, err := DefaultTestOnlyCertChain("Milan", time.Now())
if err != nil {
t.Fatal(err)
}
certBytes, err := signer.CertTableBytes()
if err != nil {
t.Fatal(err)
}
entries, err := abi.ParseSnpCertTableHeader(certBytes)
if err != nil {
t.Fatal(err)
}
var hasVcek bool
var hasVlek bool
var hasAsk bool
var hasAsvk bool
var hasArk bool
if len(entries) != 5 {
t.Errorf("ParseSnpCertTableHeader(_) returned %d entries, want 5", len(entries))
}
for _, entry := range entries {
if entry.GUID == uuid.MustParse(abi.VlekGUID) {
hasVlek = true
}
if entry.GUID == uuid.MustParse(abi.VcekGUID) {
hasVcek = true
}
if entry.GUID == uuid.MustParse(abi.AskGUID) {
hasAsk = true
}
if entry.GUID == uuid.MustParse(abi.AsvkGUID) {
hasAsvk = true
}
if entry.GUID == uuid.MustParse(abi.ArkGUID) {
hasArk = true
}
der := certBytes[entry.Offset : entry.Offset+entry.Length]
if _, err := x509.ParseCertificate(der); err != nil {
t.Errorf("could not parse certificate of %v: %v", entry.GUID, err)
}
}
if !hasVlek {
t.Errorf("fake certs missing VLEK")
}
if !hasVcek {
t.Errorf("fake certs missing VCEK")
}
if !hasAsk {
t.Errorf("fake certs missing ASK")
}
if !hasArk {
t.Errorf("fake certs missing ARK")
}
if !hasAsvk {
t.Errorf("fake certs missing ASVK")
}
if _, err := kds.VcekCertificateExtensions(signer.Vcek); err != nil {
t.Errorf("could not parse generated VCEK extensions: %v", err)
}
}
func TestCertificatesExtras(t *testing.T) {
b := &AmdSignerBuilder{
Extras: map[string][]byte{abi.ExtraPlatformInfoGUID: []byte("test")},
}
s, err := b.TestOnlyCertChain()
if err != nil {
t.Fatal(err)
}
certBytes, err := s.CertTableBytes()
if err != nil {
t.Fatal(err)
}
entries, err := abi.ParseSnpCertTableHeader(certBytes)
if err != nil {
t.Fatal(err)
}
var hasXtra bool
if len(entries) != 6 {
t.Errorf("ParseSnpCertTableHeader(_) returned %d entries, want 6", len(entries))
}
for _, entry := range entries {
if entry.GUID == uuid.MustParse(abi.ExtraPlatformInfoGUID) {
hasXtra = true
got := certBytes[entry.Offset : entry.Offset+entry.Length]
want := []byte("test")
if !bytes.Equal(got, want) {
t.Errorf("%v data is %v, want %v", abi.ExtraPlatformInfoGUID, got, want)
}
}
}
if !hasXtra {
t.Errorf("fake certs missing extra cert")
}
}
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