update vendor

vendor/github.com/google/go-containerregistry/pkg/v1/remote/image.go

@@ -15,19 +15,20 @@
 package remote
 
 import (
+	"bytes"
 	"io"
 	"io/ioutil"
 	"net/http"
 	"net/url"
 	"sync"
 
-	"github.com/google/go-containerregistry/pkg/internal/redact"
+	"github.com/google/go-containerregistry/internal/redact"
+	"github.com/google/go-containerregistry/internal/verify"
 	"github.com/google/go-containerregistry/pkg/name"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/partial"
 	"github.com/google/go-containerregistry/pkg/v1/remote/transport"
 	"github.com/google/go-containerregistry/pkg/v1/types"
-	"github.com/google/go-containerregistry/pkg/v1/v1util"
 )
 
 var acceptableImageMediaTypes = []types.MediaType{
@@ -100,7 +101,15 @@ func (r *remoteImage) RawConfigFile() ([]byte, error) {
 		return nil, err
 	}
 
-	body, err := r.fetchBlob(r.context, m.Config.Digest)
+	if m.Config.Data != nil {
+		if err := verify.Descriptor(m.Config); err != nil {
+			return nil, err
+		}
+		r.config = m.Config.Data
+		return r.config, nil
+	}
+
+	body, err := r.fetchBlob(r.context, m.Config.Size, m.Config.Digest)
 	if err != nil {
 		return nil, err
 	}
@@ -143,6 +152,10 @@ func (rl *remoteImageLayer) Compressed() (io.ReadCloser, error) {
 		return nil, err
 	}
 
+	if d.Data != nil {
+		return verify.ReadCloser(ioutil.NopCloser(bytes.NewReader(d.Data)), d.Size, d.Digest)
+	}
+
 	// We don't want to log binary layers -- this can break terminals.
 	ctx := redact.NewContext(rl.ri.context, "omitting binary blobs from logs")
 
@@ -177,7 +190,7 @@ func (rl *remoteImageLayer) Compressed() (io.ReadCloser, error) {
 			continue
 		}
 
-		return v1util.VerifyReadCloser(resp.Body, rl.digest)
+		return verify.ReadCloser(resp.Body, d.Size, rl.digest)
 	}
 
 	return nil, lastErr
@@ -221,6 +234,11 @@ func (rl *remoteImageLayer) Descriptor() (*v1.Descriptor, error) {
 	return partial.BlobDescriptor(rl, rl.digest)
 }
 
+// See partial.Exists.
+func (rl *remoteImageLayer) Exists() (bool, error) {
+	return rl.ri.blobExists(rl.digest)
+}
+
 // LayerByDigest implements partial.CompressedLayer
 func (r *remoteImage) LayerByDigest(h v1.Hash) (partial.CompressedLayer, error) {
 	return &remoteImageLayer{