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Refactor tool output (#127)
Signed-off-by: Daniel Weiße <dw@edgeless.systems> Co-authored-by: Benedict Schlüter <bs@edgeless.systems>
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parent
eee2df9723
commit
90e0f41bde
@ -16,10 +16,12 @@ import (
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"syscall"
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"github.com/edgelesssys/constellation/hack/image-measurement/server"
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"github.com/edgelesssys/constellation/internal/config"
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"github.com/edgelesssys/constellation/internal/logger"
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"go.uber.org/multierr"
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"go.uber.org/zap"
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"go.uber.org/zap/zapcore"
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"gopkg.in/yaml.v3"
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"libvirt.org/go/libvirt"
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)
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@ -280,10 +282,10 @@ func (l *libvirtInstance) deleteLibvirtInstance() error {
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return err
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}
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func (l *libvirtInstance) obtainMeasurements() (err error) {
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func (l *libvirtInstance) obtainMeasurements() (measurements config.Measurements, err error) {
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// sanity check
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if err := l.deleteLibvirtInstance(); err != nil {
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return err
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return nil, err
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}
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done := make(chan struct{}, 1)
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serv := server.New(l.log, done)
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@ -296,7 +298,7 @@ func (l *libvirtInstance) obtainMeasurements() (err error) {
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err = multierr.Append(err, l.deleteLibvirtInstance())
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}()
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if err := l.createLibvirtInstance(); err != nil {
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return err
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return nil, err
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}
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sigs := make(chan os.Signal, 1)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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@ -310,19 +312,26 @@ func (l *libvirtInstance) obtainMeasurements() (err error) {
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signal.Stop(sigs)
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close(sigs)
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if err := serv.Shutdown(); err != nil {
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return err
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return nil, err
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}
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close(done)
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return nil
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return serv.GetMeasurements(), nil
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}
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func main() {
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var imageLocation string
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var imageType string
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var imageLocation, imageType, outFile string
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var verboseLog bool
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flag.StringVar(&imageLocation, "path", "", "path to the image to measure (required)")
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flag.StringVar(&imageType, "type", "", "type of the image. One of 'qcow2' or 'raw' (required)")
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flag.StringVar(&outFile, "file", "-", "path to output file, or '-' for stdout")
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flag.BoolVar(&verboseLog, "v", false, "verbose logging")
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flag.Parse()
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log := logger.New(logger.JSONLog, zapcore.InfoLevel)
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log := logger.New(logger.JSONLog, zapcore.DebugLevel)
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if !verboseLog {
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log = log.WithIncreasedLevel(zapcore.FatalLevel) // Only print fatal errors in non-verbose mode
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}
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if imageLocation == "" || imageType == "" {
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flag.Usage()
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@ -343,8 +352,22 @@ func main() {
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imagePath: imageLocation,
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}
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if err := lInstance.obtainMeasurements(); err != nil {
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measurements, err := lInstance.obtainMeasurements()
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if err != nil {
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log.With(zap.Error(err)).Fatalf("Failed to obtain PCR measurements")
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}
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log.Infof("instaces terminated successfully")
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log.Infof("instances terminated successfully")
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output, err := yaml.Marshal(measurements)
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if err != nil {
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log.With(zap.Error(err)).Fatalf("Failed to marshal measurements")
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}
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if outFile == "-" {
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fmt.Println(string(output))
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} else {
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if err := os.WriteFile(outFile, output, 0o644); err != nil {
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log.With(zap.Error(err)).Fatalf("Failed to write measurements to file")
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}
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}
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}
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@ -19,6 +19,7 @@ import (
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type Server struct {
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log *logger.Logger
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server http.Server
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measurements map[uint32][]byte
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done chan<- struct{}
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}
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@ -77,5 +78,12 @@ func (s *Server) logPCRs(w http.ResponseWriter, r *http.Request) {
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log.Infof("PCR 4 %x", pcrs[4])
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log.Infof("PCR 8 %x", pcrs[8])
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log.Infof("PCR 9 %x", pcrs[9])
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s.measurements = pcrs
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s.done <- struct{}{}
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}
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func (s *Server) GetMeasurements() map[uint32][]byte {
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return s.measurements
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}
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