Use ToSlash / FromSlash to normalize filepaths

src/pkg/layout/package.go

@@ -177,7 +177,8 @@ func (pp *PackagePaths) SetFromLayers(layers []ocispec.Descriptor) {
 // SetFromPaths maps paths to package paths.
 func (pp *PackagePaths) SetFromPaths(paths []string) {
 	for _, rel := range paths {
-		switch path := rel; {
+		// Convert from the standard '/' to the OS path separator for Windows support
+		switch path := filepath.FromSlash(rel); {
 		case path == ZarfYAML:
 			pp.ZarfYAML = filepath.Join(pp.Base, path)
 		case path == Signature:
@@ -186,11 +187,11 @@ func (pp *PackagePaths) SetFromPaths(paths []string) {
 			pp.Checksums = filepath.Join(pp.Base, path)
 		case path == SBOMTar:
 			pp.SBOMs.Path = filepath.Join(pp.Base, path)
-		case path == strings.Join([]string{ImagesDir, OCILayout}, "/"):
+		case path == filepath.Join(ImagesDir, OCILayout):
 			pp.Images.OCILayout = filepath.Join(pp.Base, path)
-		case path == strings.Join([]string{ImagesDir, IndexJSON}, "/"):
+		case path == filepath.Join(ImagesDir, IndexJSON):
 			pp.Images.Index = filepath.Join(pp.Base, path)
-		case strings.HasPrefix(path, strings.Join([]string{ImagesDir, "blobs", "sha256"}, "/")):
+		case strings.HasPrefix(path, filepath.Join(ImagesDir, "blobs", "sha256")):
 			if pp.Images.Base == "" {
 				pp.Images.Base = filepath.Join(pp.Base, ImagesDir)
 			}
@@ -213,16 +214,19 @@ func (pp *PackagePaths) SetFromPaths(paths []string) {
 // Files returns a map of all the files in the package.
 func (pp *PackagePaths) Files() map[string]string {
 	pathMap := make(map[string]string)
+
 	stripBase := func(path string) string {
 		rel, _ := filepath.Rel(pp.Base, path)
-		return rel
+		return filepath.ToSlash(rel)
 	}
+
 	add := func(path string) {
 		if path == "" {
 			return
 		}
 		pathMap[stripBase(path)] = path
 	}
+
 	add(pp.ZarfYAML)
 	add(pp.Signature)
 	add(pp.Checksums)

src/pkg/oci/manifest.go

@@ -35,9 +35,9 @@ func NewZarfOCIManifest(manifest *ocispec.Manifest) *ZarfOCIManifest {
 }
 
 // Locate returns the descriptor for the first layer with the given path or digest.
-func (m *ZarfOCIManifest) Locate(uri string) ocispec.Descriptor {
+func (m *ZarfOCIManifest) Locate(pathOrDigest string) ocispec.Descriptor {
 	return helpers.Find(m.Layers, func(layer ocispec.Descriptor) bool {
-		return layer.Annotations[ocispec.AnnotationTitle] == uri || layer.Digest.Encoded() == uri
+		return layer.Annotations[ocispec.AnnotationTitle] == filepath.ToSlash(pathOrDigest) || layer.Digest.Encoded() == pathOrDigest
 	})
 }
 

src/pkg/oci/pull.go

@@ -32,7 +32,10 @@ var (
 
 // FileDescriptorExists returns true if the given file exists in the given directory with the expected SHA.
 func (o *OrasRemote) FileDescriptorExists(desc ocispec.Descriptor, destinationDir string) bool {
-	destinationPath := filepath.Join(destinationDir, desc.Annotations[ocispec.AnnotationTitle])
+	// Convert from the standard '/' to the OS path separator for Windows support
+	rel := filepath.FromSlash(desc.Annotations[ocispec.AnnotationTitle])
+	destinationPath := filepath.Join(destinationDir, rel)
+
 	info, err := os.Stat(destinationPath)
 	if err != nil {
 		return false
@@ -250,7 +253,11 @@ func (o *OrasRemote) PullLayer(desc ocispec.Descriptor, destinationDir string) e
 	if err != nil {
 		return err
 	}
-	return utils.WriteFile(filepath.Join(destinationDir, desc.Annotations[ocispec.AnnotationTitle]), b)
+
+	// Convert from the standard '/' to the OS path separator for Windows support
+	rel := filepath.FromSlash(desc.Annotations[ocispec.AnnotationTitle])
+
+	return utils.WriteFile(filepath.Join(destinationDir, rel), b)
 }
 
 // PullPackagePaths pulls multiple files from the remote repository and saves them to `destinationDir`.

src/pkg/packager/create.go

@@ -598,6 +598,10 @@ func (p *Packager) generatePackageChecksums() (string, error) {
 		if rel == layout.ZarfYAML || rel == layout.Checksums {
 			continue
 		}
+
+		// Convert from the OS path separator to '/' for Windows support
+		rel = filepath.ToSlash(rel)
+
 		sum, err := utils.GetSHA256OfFile(abs)
 		if err != nil {
 			return "", err

src/pkg/packager/sources/validate.go

@@ -88,7 +88,10 @@ func ValidatePackageIntegrity(loaded *layout.PackagePaths, aggregateChecksum str
 	err = lineByLine(checksumPath, func(line string) error {
 		split := strings.Split(line, " ")
 		sha := split[0]
-		rel := split[1]
+
+		// Convert from the standard '/' to the OS path separator for Windows support
+		rel := filepath.FromSlash(split[1])
+
 		if sha == "" || rel == "" {
 			return fmt.Errorf("invalid checksum line: %s", line)
 		}