feat(sbom): add image labels into SPDX and CycloneDX reports (#7257)

Co-authored-by: Teppei Fukuda <knqyf263@gmail.com>

pkg/sbom/core/bom.go

@@ -25,11 +25,12 @@ const (
 	PropertyClass         = "Class"
 
 	// Image properties
-	PropertySize       = "Size"
-	PropertyImageID    = "ImageID"
-	PropertyRepoDigest = "RepoDigest"
-	PropertyDiffID     = "DiffID"
-	PropertyRepoTag    = "RepoTag"
+	PropertySize         = "Size"
+	PropertyImageID      = "ImageID"
+	PropertyRepoDigest   = "RepoDigest"
+	PropertyDiffID       = "DiffID"
+	PropertyRepoTag      = "RepoTag"
+	PropertyLabelsPrefix = "Labels"
 
 	// Package properties
 	PropertyPkgID           = "PkgID"

pkg/sbom/cyclonedx/marshal_test.go

@@ -105,6 +105,11 @@ func TestMarshaler_MarshalReport(t *testing.T) {
 					RepoDigests: []string{"rails@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177"},
 					ImageConfig: v1.ConfigFile{
 						Architecture: "arm64",
+						Config: v1.Config{
+							Labels: map[string]string{
+								"vendor": "aquasecurity",
+							},
+						},
 					},
 				},
 				Results: types.Results{
@@ -301,6 +306,10 @@ func TestMarshaler_MarshalReport(t *testing.T) {
 								Name:  "aquasecurity:trivy:ImageID",
 								Value: "sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6",
 							},
+							{
+								Name:  "aquasecurity:trivy:Labels:vendor",
+								Value: "aquasecurity",
+							},
 							{
 								Name:  "aquasecurity:trivy:RepoDigest",
 								Value: "rails@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177",

pkg/sbom/io/encode.go

@@ -73,6 +73,15 @@ func (e *Encoder) rootComponent(r types.Report) (*core.Component, error) {
 			Value: r.Metadata.ImageID,
 		})
 
+		// Save image labels as properties with `Labels:` prefix.
+		// e.g. `LABEL vendor="aquasecurity"` => `Labels:vendor` -> `aquasecurity`
+		for label, value := range r.Metadata.ImageConfig.Config.Labels {
+			props = append(props, core.Property{
+				Name:  core.PropertyLabelsPrefix + ":" + label,
+				Value: value,
+			})
+		}
+
 		p, err := purl.New(purl.TypeOCI, r.Metadata, ftypes.Package{})
 		if err != nil {
 			return nil, xerrors.Errorf("failed to new package url for oci: %w", err)

pkg/sbom/io/encode_test.go

@@ -3,6 +3,7 @@ package io_test
 import (
 	"testing"
 
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/package-url/packageurl-go"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -43,6 +44,13 @@ func TestEncoder_Encode(t *testing.T) {
 					RepoDigests: []string{
 						"debian@sha256:4482958b4461ff7d9fabc24b3a9ab1e9a2c85ece07b2db1840c7cbc01d053e90",
 					},
+					ImageConfig: v1.ConfigFile{
+						Config: v1.Config{
+							Labels: map[string]string{
+								"vendor": "aquasecurity",
+							},
+						},
+					},
 				},
 				Results: []types.Result{
 					{
@@ -185,6 +193,10 @@ func TestEncoder_Encode(t *testing.T) {
 						BOMRef: "pkg:oci/debian@sha256%3A4482958b4461ff7d9fabc24b3a9ab1e9a2c85ece07b2db1840c7cbc01d053e90?repository_url=index.docker.io%2Flibrary%2Fdebian",
 					},
 					Properties: []core.Property{
+						{
+							Name:  "Labels:vendor",
+							Value: "aquasecurity",
+						},
 						{
 							Name:  core.PropertyRepoDigest,
 							Value: "debian@sha256:4482958b4461ff7d9fabc24b3a9ab1e9a2c85ece07b2db1840c7cbc01d053e90",

pkg/sbom/spdx/marshal_test.go

@@ -49,6 +49,11 @@ func TestMarshaler_Marshal(t *testing.T) {
 					RepoDigests: []string{"rails@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177"},
 					ImageConfig: v1.ConfigFile{
 						Architecture: "arm64",
+						Config: v1.Config{
+							Labels: map[string]string{
+								"vendor": "aquasecurity",
+							},
+						},
 					},
 				},
 				Results: types.Results{
@@ -199,6 +204,7 @@ func TestMarshaler_Marshal(t *testing.T) {
 						PackageAttributionTexts: []string{
 							"DiffID: sha256:d871dadfb37b53ef1ca45be04fc527562b91989991a8f545345ae3be0b93f92a",
 							"ImageID: sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6",
+							"Labels:vendor: aquasecurity",
 							"RepoDigest: rails@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177",
 							"RepoTag: rails:latest",
 							"SchemaVersion: 2",