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feat(sbom): Add marshal for spdx (#2867)
Co-authored-by: knqyf263 <knqyf263@gmail.com>
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Original file line number | Diff line number | Diff line change |
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@@ -1,185 +1,47 @@ | ||
package spdx | ||
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import ( | ||
"fmt" | ||
"io" | ||
"strings" | ||
"time" | ||
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"github.com/google/uuid" | ||
"github.com/mitchellh/hashstructure/v2" | ||
"github.com/spdx/tools-golang/jsonsaver" | ||
"github.com/spdx/tools-golang/spdx" | ||
"github.com/spdx/tools-golang/tvsaver" | ||
"golang.org/x/xerrors" | ||
"k8s.io/utils/clock" | ||
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ftypes "github.com/aquasecurity/trivy/pkg/fanal/types" | ||
"github.com/aquasecurity/trivy/pkg/sbom/spdx" | ||
"github.com/aquasecurity/trivy/pkg/types" | ||
) | ||
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const ( | ||
SPDXVersion = "SPDX-2.2" | ||
DataLicense = "CC0-1.0" | ||
SPDXIdentifier = "DOCUMENT" | ||
DocumentNamespace = "http://aquasecurity.github.io/trivy" | ||
CreatorOrganization = "aquasecurity" | ||
CreatorTool = "trivy" | ||
) | ||
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type Hash func(v interface{}, format hashstructure.Format, opts *hashstructure.HashOptions) (uint64, error) | ||
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type Writer struct { | ||
output io.Writer | ||
version string | ||
*options | ||
} | ||
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type newUUID func() uuid.UUID | ||
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type options struct { | ||
format spdx.Document2_1 | ||
clock clock.Clock | ||
newUUID newUUID | ||
hasher Hash | ||
spdxFormat string | ||
} | ||
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type option func(*options) | ||
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type spdxSaveFunction func(*spdx.Document2_2, io.Writer) error | ||
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func WithClock(clock clock.Clock) option { | ||
return func(opts *options) { | ||
opts.clock = clock | ||
} | ||
} | ||
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func WithNewUUID(newUUID newUUID) option { | ||
return func(opts *options) { | ||
opts.newUUID = newUUID | ||
} | ||
} | ||
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func WithHasher(hasher Hash) option { | ||
return func(opts *options) { | ||
opts.hasher = hasher | ||
} | ||
output io.Writer | ||
version string | ||
format string | ||
marshaler *spdx.Marshaler | ||
} | ||
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func NewWriter(output io.Writer, version string, spdxFormat string, opts ...option) Writer { | ||
o := &options{ | ||
format: spdx.Document2_1{}, | ||
clock: clock.RealClock{}, | ||
newUUID: uuid.New, | ||
hasher: hashstructure.Hash, | ||
spdxFormat: spdxFormat, | ||
} | ||
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for _, opt := range opts { | ||
opt(o) | ||
} | ||
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func NewWriter(output io.Writer, version string, spdxFormat string) Writer { | ||
return Writer{ | ||
output: output, | ||
version: version, | ||
options: o, | ||
output: output, | ||
version: version, | ||
format: spdxFormat, | ||
marshaler: spdx.NewMarshaler(), | ||
} | ||
} | ||
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func (cw Writer) Write(report types.Report) error { | ||
spdxDoc, err := cw.convertToBom(report, cw.version) | ||
func (w Writer) Write(report types.Report) error { | ||
spdxDoc, err := w.marshaler.Marshal(report) | ||
if err != nil { | ||
return xerrors.Errorf("failed to convert bom: %w", err) | ||
return xerrors.Errorf("failed to marshal spdx: %w", err) | ||
} | ||
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var saveFunc spdxSaveFunction | ||
if cw.spdxFormat != "spdx-json" { | ||
saveFunc = tvsaver.Save2_2 | ||
if w.format == "spdx-json" { | ||
if err := jsonsaver.Save2_2(spdxDoc, w.output); err != nil { | ||
return xerrors.Errorf("failed to save spdx json: %w", err) | ||
} | ||
} else { | ||
saveFunc = jsonsaver.Save2_2 | ||
} | ||
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if err = saveFunc(spdxDoc, cw.output); err != nil { | ||
return xerrors.Errorf("failed to save bom: %w", err) | ||
} | ||
return nil | ||
} | ||
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func (cw *Writer) convertToBom(r types.Report, version string) (*spdx.Document2_2, error) { | ||
packages := make(map[spdx.ElementID]*spdx.Package2_2) | ||
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for _, result := range r.Results { | ||
for _, pkg := range result.Packages { | ||
spdxPackage, err := cw.pkgToSpdxPackage(pkg) | ||
if err != nil { | ||
return nil, xerrors.Errorf("failed to parse pkg: %w", err) | ||
} | ||
packages[spdxPackage.PackageSPDXIdentifier] = &spdxPackage | ||
if err := tvsaver.Save2_2(spdxDoc, w.output); err != nil { | ||
return xerrors.Errorf("failed to save spdx tag-value: %w", err) | ||
} | ||
} | ||
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return &spdx.Document2_2{ | ||
CreationInfo: &spdx.CreationInfo2_2{ | ||
SPDXVersion: SPDXVersion, | ||
DataLicense: DataLicense, | ||
SPDXIdentifier: SPDXIdentifier, | ||
DocumentName: r.ArtifactName, | ||
DocumentNamespace: getDocumentNamespace(r, cw), | ||
CreatorOrganizations: []string{CreatorOrganization}, | ||
CreatorTools: []string{CreatorTool}, | ||
Created: cw.clock.Now().UTC().Format(time.RFC3339Nano), | ||
}, | ||
Packages: packages, | ||
}, nil | ||
} | ||
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func (cw *Writer) pkgToSpdxPackage(pkg ftypes.Package) (spdx.Package2_2, error) { | ||
var spdxPackage spdx.Package2_2 | ||
license := getLicense(pkg) | ||
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pkgID, err := getPackageID(cw.hasher, pkg) | ||
if err != nil { | ||
return spdx.Package2_2{}, xerrors.Errorf("failed to get %s package ID: %w", pkg.Name, err) | ||
} | ||
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spdxPackage.PackageSPDXIdentifier = spdx.ElementID(pkgID) | ||
spdxPackage.PackageName = pkg.Name | ||
spdxPackage.PackageVersion = pkg.Version | ||
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// The Declared License is what the authors of a project believe govern the package | ||
spdxPackage.PackageLicenseConcluded = license | ||
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// The Concluded License field is the license the SPDX file creator believes governs the package | ||
spdxPackage.PackageLicenseDeclared = license | ||
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return spdxPackage, nil | ||
} | ||
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func getLicense(p ftypes.Package) string { | ||
if len(p.Licenses) == 0 { | ||
return "NONE" | ||
} | ||
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return strings.Join(p.Licenses, ", ") | ||
} | ||
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func getDocumentNamespace(r types.Report, cw *Writer) string { | ||
return DocumentNamespace + "/" + string(r.ArtifactType) + "/" + r.ArtifactName + "-" + cw.newUUID().String() | ||
} | ||
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func getPackageID(h Hash, p ftypes.Package) (string, error) { | ||
// Not use these values for the hash | ||
p.Layer = ftypes.Layer{} | ||
p.FilePath = "" | ||
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f, err := h(p, hashstructure.FormatV2, &hashstructure.HashOptions{ | ||
ZeroNil: true, | ||
SlicesAsSets: true, | ||
}) | ||
if err != nil { | ||
return "", xerrors.Errorf("could not build package ID for package=%+v: %+v", p, err) | ||
} | ||
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return fmt.Sprintf("%x", f), nil | ||
return nil | ||
} |
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