Signatures are stored in the OCI Manifest v2 registry [0], and are
expected to follow the Cosign Signature Specification [0]
The following CLI utilities are provided with `dangerzone-image`:
For checking new container images, upgrading them and downloading them:
- `upgrade` allows to upgrade the current installed image to the
last one available on the OCI registry, downloading and storing the
signatures in the process.
- `verify-local` allows the verify the currently installed image against
downloaded signatures and public key.
To prepare and install archives on air-gapped environments:
- `prepare-archive` helps to prepare an archive to install on another
machine
- `load-archive` helps upgrade the local image to the archive given
in argument.
Signatures are stored locally using the format provided by `cosign
download signature`, and the Rekor log index is used to ensure the
requested-to-install container image is fresher than the one already
present on the system.
[0] https://github.com/sigstore/cosign/blob/main/specs/SIGNATURE_SPEC.md
This sets the container runtime in the settings, and provides an easy
way to do so for users, without having to mess with the json settings.
When setting the container runtime, one can just pass "podman" and the
path to the executable will be stored in the settings.
Loading an image built with Buildkit in Podman 3.4 messes up its name.
The tag somehow becomes the name of the loaded image.
We know that older Podman versions are not generally affected, since
Podman v3.0.1 on Debian Bullseye works properly. Also, Podman v4.0 is
not affected, so it makes sense to target only Podman v3.4 for a fix.
The fix is simple, tag the image properly based on the expected tag from
`share/image-id.txt` and delete the incorrect tag.
Refs containers/podman#16490
Find all references to the `container.tar.gz` file, and replace them
with references to `container.tar`. Moreover, remove the `--no-save`
argument of `build-image.py` since we now always save the image.
Finally, fix some stale references to Poetry, which are not necessary
anymore.
