Ensure SPDXIDs are valid (anchore#955)

internal/formats/common/spdxhelpers/spdxid.go

@@ -0,0 +1,13 @@
+package spdxhelpers
+
+import (
+	"regexp"
+)
+
+var expr = regexp.MustCompile("[^a-zA-Z0-9.-]")
+
+// SPDX spec says SPDXID must be:
+// "SPDXRef-"[idstring] where [idstring] is a unique string containing letters, numbers, ., and/or -
+func SanitizeElementID(id string) string {
+	return expr.ReplaceAllString(id, "-")
+}

internal/formats/common/spdxhelpers/spdxid_test.go

@@ -0,0 +1,39 @@
+package spdxhelpers
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_SanitizeElementID(t *testing.T) {
+	tests := []struct {
+		input    string
+		expected string
+	}{
+		{
+			input:    "letters",
+			expected: "letters",
+		},
+		{
+			input:    "ssl-client",
+			expected: "ssl-client",
+		},
+		{
+			input:    "ssl_client",
+			expected: "ssl-client",
+		},
+		{
+			input:    "go-module-sigs.k8s.io/structured-merge-diff/v3",
+			expected: "go-module-sigs.k8s.io-structured-merge-diff-v3",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.input, func(t *testing.T) {
+			actual := SanitizeElementID(test.input)
+
+			assert.Equal(t, test.expected, actual)
+		})
+	}
+}

internal/formats/spdx22json/model/element_id.go

@@ -1,37 +1,13 @@
 package model
 
+import "github.com/anchore/syft/internal/formats/common/spdxhelpers"
+
 // ElementID represents the identifier string portion of an SPDX element
 // identifier. DocElementID should be used for any attributes which can
 // contain identifiers defined in a different SPDX document.
 // ElementIDs should NOT contain the mandatory 'SPDXRef-' portion.
 type ElementID string
 
 func (e ElementID) String() string {
-	return "SPDXRef-" + string(e)
-}
-
-// DocElementID represents an SPDX element identifier that could be defined
-// in a different SPDX document, and therefore could have a "DocumentRef-"
-// portion, such as Relationship and Annotations.
-// ElementID is used for attributes in which a "DocumentRef-" portion cannot
-// appear, such as a Package or File definition (since it is necessarily
-// being defined in the present document).
-// DocumentRefID will be the empty string for elements defined in the
-// present document.
-// DocElementIDs should NOT contain the mandatory 'DocumentRef-' or
-// 'SPDXRef-' portions.
-type DocElementID struct {
-	DocumentRefID string
-	ElementRefID  ElementID
-}
-
-// RenderDocElementID takes a DocElementID and returns the string equivalent,
-// with the SPDXRef- prefix (and, if applicable, the DocumentRef- prefix)
-// reinserted.
-func (d DocElementID) String() string {
-	prefix := ""
-	if d.DocumentRefID != "" {
-		prefix = "DocumentRef-" + d.DocumentRefID + ":"
-	}
-	return prefix + d.ElementRefID.String()
+	return "SPDXRef-" + spdxhelpers.SanitizeElementID(string(e))
 }

internal/formats/spdx22tagvalue/encoder_test.go

@@ -6,6 +6,9 @@ import (
 	"testing"
 
 	"github.com/anchore/syft/internal/formats/common/testutils"
+	"github.com/anchore/syft/syft/pkg"
+	"github.com/anchore/syft/syft/sbom"
+	"github.com/anchore/syft/syft/source"
 )
 
 var updateSpdxTagValue = flag.Bool("update-spdx-tv", false, "update the *.golden files for spdx-tv encoders")
@@ -31,6 +34,32 @@ func TestSPDXTagValueImageEncoder(t *testing.T) {
 	)
 }
 
+func TestSPDXJSONSPDXIDs(t *testing.T) {
+	var pkgs []pkg.Package
+	for _, name := range []string{"some/slashes", "@at-sign", "under_scores"} {
+		p := pkg.Package{
+			Name: name,
+		}
+		p.SetID()
+		pkgs = append(pkgs, p)
+	}
+	testutils.AssertEncoderAgainstGoldenSnapshot(t,
+		Format(),
+		sbom.SBOM{
+			Artifacts: sbom.Artifacts{
+				PackageCatalog: pkg.NewCatalog(pkgs...),
+			},
+			Relationships: nil,
+			Source: source.Metadata{
+				Scheme: source.DirectoryScheme,
+			},
+			Descriptor: sbom.Descriptor{},
+		},
+		true,
+		spdxTagValueRedactor,
+	)
+}
+
 func spdxTagValueRedactor(s []byte) []byte {
 	// each SBOM reports the time it was generated, which is not useful during snapshot testing
 	s = regexp.MustCompile(`Created: .*`).ReplaceAll(s, []byte("redacted"))

internal/formats/spdx22tagvalue/test-fixtures/snapshot/TestSPDXJSONSPDXIDs.golden

@@ -0,0 +1,40 @@
+SPDXVersion: SPDX-2.2
+DataLicense: CC0-1.0
+SPDXID: SPDXRef-DOCUMENT
+DocumentName: .
+DocumentNamespace: https://anchore.com/syft/dir/e69056a9-935e-4f00-b85f-9467f5d99a92
+LicenseListVersion: 3.16
+Creator: Organization: Anchore, Inc
+Creator: Tool: syft-[not provided]
+Created: 2022-04-13T16:38:03Z
+
+##### Package: @at-sign
+
+PackageName: @at-sign
+SPDXID: SPDXRef-Package---at-sign-739e4f0d93fb8298
+PackageDownloadLocation: NOASSERTION
+FilesAnalyzed: false
+PackageLicenseConcluded: NONE
+PackageLicenseDeclared: NONE
+PackageCopyrightText: NOASSERTION
+
+##### Package: some/slashes
+
+PackageName: some/slashes
+SPDXID: SPDXRef-Package--some-slashes-26db06648b24bff9
+PackageDownloadLocation: NOASSERTION
+FilesAnalyzed: false
+PackageLicenseConcluded: NONE
+PackageLicenseDeclared: NONE
+PackageCopyrightText: NOASSERTION
+
+##### Package: under_scores
+
+PackageName: under_scores
+SPDXID: SPDXRef-Package--under-scores-250cbfefcdea318b
+PackageDownloadLocation: NOASSERTION
+FilesAnalyzed: false
+PackageLicenseConcluded: NONE
+PackageLicenseDeclared: NONE
+PackageCopyrightText: NOASSERTION
+

internal/formats/spdx22tagvalue/to_format_model.go

@@ -96,7 +96,7 @@ func toFormatPackages(catalog *pkg.Catalog) map[spdx.ElementID]*spdx.Package2_2
 
 	for _, p := range catalog.Sorted() {
 		// name should be guaranteed to be unique, but semantically useful and stable
-		id := fmt.Sprintf("Package-%+v-%s-%s", p.Type, p.Name, p.ID())
+		id := spdxhelpers.SanitizeElementID(fmt.Sprintf("Package-%+v-%s-%s", p.Type, p.Name, p.ID()))
 
 		// If the Concluded License is not the same as the Declared License, a written explanation should be provided
 		// in the Comments on License field (section 3.16). With respect to NOASSERTION, a written explanation in