Project

Profile

Help

Story #9507

Updated by ipanova@redhat.com over 2 years ago

Mirrored signatures are not verified. Signature verification is offloaded to the client. 

 If `with-signature=True` ( TBD agree on naming)    was specified only those images that have signature with be mirrored. Rest of the images will be skipped. `Signature server location` needs to be specified. 
 Otherwise it will be assumed that the signature is stored on the registry in a form of manifest or a separate object: 
 * If it is a separate object, signature API extensions should be available on the registry and `X-Registry-Supports-Signatures` header will identify that https://github.com/containers/image/blob/main/docs/signature-protocols.md#openshift-dockerdistribution-api-extension 
 * If it is stored in a form of a manifest then it most likely was signed with cosign    https://github.com/SigStore/cosign#signing-subjects. 

 **Q** does podman/skopeo support verification of cosign signature type? I see only atomic type for now https://github.com/containers/image/blob/main/docs/containers-signature.5.md#criticaltype now.

Back