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// Copyright 2019 Google Inc.
//
// 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 eventlog
import (
"encoding/json"
"os"
"testing"
"github.com/google/go-attestation/attest"
"github.com/google/go-attestation/attest/attest-tool/internal"
)
func parseEvents(t *testing.T, testdata string) []attest.Event {
data, err := os.ReadFile(testdata)
if err != nil {
t.Fatalf("reading test data: %v", err)
}
var dump internal.Dump
if err := json.Unmarshal(data, &dump); err != nil {
t.Fatalf("parsing test data: %v", err)
}
ak, err := attest.ParseAKPublic(dump.Static.TPMVersion, dump.AK.Public)
if err != nil {
t.Fatalf("parsing AK: %v", err)
}
if err := ak.Verify(attest.Quote{
Version: dump.Static.TPMVersion,
Quote: dump.Quote.Quote,
Signature: dump.Quote.Signature,
}, dump.Log.PCRs, dump.Quote.Nonce); err != nil {
t.Fatalf("verifying quote: %v", err)
}
el, err := attest.ParseEventLog(dump.Log.Raw)
if err != nil {
t.Fatalf("parsing event log: %v", err)
}
events, err := el.Verify(dump.Log.PCRs)
if err != nil {
t.Fatalf("validating event log: %v", err)
}
return events
}
func notEmpty(t *testing.T, name string, field []byte) {
t.Helper()
if len(field) == 0 {
t.Errorf("field %s wasn't populated", name)
}
}
func isEmpty(t *testing.T, name string, field []byte) {
t.Helper()
if len(field) != 0 {
t.Errorf("expected field %s not to be populated", name)
}
}
func TestParseSecureBootWindows(t *testing.T) {
events := parseEvents(t, "../../../testdata/windows_gcp_shielded_vm.json")
sb, err := ParseSecureBoot(events)
if err != nil {
t.Fatalf("parse secure boot: %v", err)
}
if !sb.Enabled {
t.Errorf("expected secure boot to be enabled")
}
notEmpty(t, "db", sb.DB)
notEmpty(t, "dbx", sb.DBX)
notEmpty(t, "pk", sb.PK)
notEmpty(t, "kek", sb.KEK)
isEmpty(t, "dbt", sb.DBT)
isEmpty(t, "dbr", sb.DBR)
notEmpty(t, "Authority", sb.Authority)
}
func TestParseSecureBootLinux(t *testing.T) {
events := parseEvents(t, "../../../testdata/linux_tpm12.json")
sb, err := ParseSecureBoot(events)
if err != nil {
t.Errorf("parse secure boot: %v", err)
}
if sb.Enabled {
t.Errorf("expected secure boot to be disabled")
}
notEmpty(t, "db", sb.DB)
notEmpty(t, "dbx", sb.DBX)
isEmpty(t, "dbt", sb.DBT)
isEmpty(t, "dbr", sb.DBR)
isEmpty(t, "Authority", sb.Authority)
}
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