I've run the latest Docker registry from the Hub using Swift as a backend, successfully uploading and downloading. However, when I enable the swift encryption and keymaster middlewares in Swift 2.9.0, I am unable to successfully pull images.

The data appears to upload correctly, with the only visible errors during upload:
time="2016-10-20T14:32:21.928589064Z" level=error msg="response completed with error" err.code="blob unknown" err.detail=sha256:4d4aa55e97e1839618094bfbd43ed4a3a1f59280a5fec29752d146a1253c6e72 err.message="blob unknown to registry" go.version=go1.6.3 http.request.host="172.30.97.46:5000" http.request.id=b1cf6582-f760-4b48-b760-fba8d4a67264 http.request.method=HEAD http.request.remoteaddr="172.30.97.46:56498" http.request.uri="/v2/jenkinsenc/blobs/sha256:4d4aa55e97e1839618094bfbd43ed4a3a1f59280a5fec29752d146a1253c6e72" http.request.useragent="docker/1.9.1 go/go1.4.2 git-commit/a34a1d5 kernel/4.2.0-27-generic os/linux arch/amd64" http.response.contenttype="application/json; charset=utf-8" http.response.duration=49.233506ms http.response.status=404 http.response.written=157 instance.id=16e2ee86-2129-4f6c-887b-2a38940d074e service=registry vars.digest="sha256:4d4aa55e97e1839618094bfbd43ed4a3a1f59280a5fec29752d146a1253c6e72" vars.name=jenkinsenc version=v2.5.1

All of the uploaded swift objects appear to contain reasonable content.

If I do not delete the local copy of the image, the SHA matches correctly:

docker pull  172.30.97.46:5000/jenkinsenc
Using default tag: latest
latest: Pulling from jenkinsenc
Digest: sha256:047be5412a674d2520f5d517174bf1b0624f30adeea34cf3f71fecc44ecc974a
Status: Image is up to date for 172.30.97.46:5000/jenkinsenc:latest

But when I delete the local copy and try again, it starts downloading and verifying checksums.

docker pull 172.30.97.46:5000/jenkinsenc
Using default tag: latest
latest: Pulling from jenkinsenc
89aec0449e93: Verifying Checksum 
....
68cb9cf3ef25: Verifying Checksum 
b31c735fdce2: Downloading [====================================>              ] 51.35 MB/69.54 MB
ce152cf9fb1e: Verifying Checksum 
.....
f97979a807e2: Verifying Checksum 
Pulling repository 172.30.97.46:5000/jenkinsenc
Error: image jenkinsenc:latest not found

I found this 404 message in the registry logs, not sure it it's related.
172.30.97.46 - - [20/Oct/2016:16:58:08 +0000] "GET /v1/repositories/jenkinsenc/images HTTP/1.1" 404 19 "" "docker/1.9.1 go/go1.4.2 git-commit/a34a1d5 kernel/4.2.0-27-generic os/linux arch/amd64"

Is swift serverside encryption at rest supported?

sysinfo.txt