Commit graph

3 commits

Author SHA1 Message Date
Alexis Métaireau
7002ab85a0 fixup! Download and verify cosign signatures 2025-02-12 11:40:36 +01:00
Alexis Métaireau
3d28ae2eee
Download and verify cosign signatures
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
2025-02-11 19:09:53 +01:00
Alexis Métaireau
81ee267591
Add a dangerzone-image CLI script
It contains utilities to interact with OCI registries, like getting the list of
published tags and getting the content of a manifest. It does so
via the use of the Docker Registry API v2 [0].

The script has been added to the `dev_scripts`, and is also installed on
the system under `dangerzone-image`.

[0]  https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry
2025-02-11 18:13:39 +01:00