Vendor latest c/image

Signed-off-by: Urvashi Mohnani <umohnani@redhat.com>

vendor/github.com/containers/storage/pkg/chunked/toc/toc.go

@@ -0,0 +1,34 @@
+package toc
+
+import (
+	"github.com/containers/storage/pkg/chunked/internal"
+	digest "github.com/opencontainers/go-digest"
+)
+
+// tocJSONDigestAnnotation is the annotation key for the digest of the estargz
+// TOC JSON.
+// It is defined in github.com/containerd/stargz-snapshotter/estargz as TOCJSONDigestAnnotation
+// Duplicate it here to avoid a dependency on the package.
+const tocJSONDigestAnnotation = "containerd.io/snapshot/stargz/toc.digest"
+
+// GetTOCDigest returns the digest of the TOC as recorded in the annotations.
+// This function retrieves a digest that represents the content of a
+// table of contents (TOC) from the image's annotations.
+// This is an experimental feature and may be changed/removed in the future.
+func GetTOCDigest(annotations map[string]string) (*digest.Digest, error) {
+	if contentDigest, ok := annotations[tocJSONDigestAnnotation]; ok {
+		d, err := digest.Parse(contentDigest)
+		if err != nil {
+			return nil, err
+		}
+		return &d, nil
+	}
+	if contentDigest, ok := annotations[internal.ManifestChecksumKey]; ok {
+		d, err := digest.Parse(contentDigest)
+		if err != nil {
+			return nil, err
+		}
+		return &d, nil
+	}
+	return nil, nil
+}