From d8dbcc3efa5219806645f215703de8a7890d5cba Mon Sep 17 00:00:00 2001
From: Stephen J Day <stephen.day@docker.com>
Date: Tue, 21 Apr 2015 11:34:18 -0700
Subject: [PATCH] log canonical digest on verification error

Signed-off-by: Stephen J Day <stephen.day@docker.com>
---
 registry/storage/layerwriter.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/registry/storage/layerwriter.go b/registry/storage/layerwriter.go
index fe118597..0a42aa40 100644
--- a/registry/storage/layerwriter.go
+++ b/registry/storage/layerwriter.go
@@ -345,6 +345,8 @@ func (lw *layerWriter) validateLayer(dgst digest.Digest) (digest.Digest, error)
 	}
 
 	if !verified {
+		ctxu.GetLoggerWithField(lw.layerStore.repository.ctx, "canonical", dgst).
+			Errorf("canonical digest does match provided digest")
 		return "", distribution.ErrLayerInvalidDigest{
 			Digest: dgst,
 			Reason: fmt.Errorf("content does not match digest"),