Extends the builtin default policy to verify docker-github-builder
signatures on docker/buildkit-syft-scanner images. Tags `latest` and
1.10+ require a signature from the docker/buildkit-syft-scanner source
repository; older tags pass through unchanged. Factors the shared ref
matching logic into sig_ref_matches for dockerfile and introduces a
syft-scanner variant that uses the plain refs/tags/ prefix.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Embed an opt-in default source policy for Docker-managed frontend images.
Load it ahead of user policies when enabled, and cover behavior with table-
driven policy tests for signed, unsigned, floating, and labs tags.
Makes sure if there is any attack against the docker/dockerfile
releases, or they accidentally point to worng images, these are automatically detected.
In a future release these should become opt-out.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Ensure the negative checksum case always mutates the digest instead of
sometimes reproducing the original value when it already starts with 0.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Allow child refs from partial evaluation to match allowed parent keys on
path boundaries and return canonical unknowns for metadata resolution.
Add tests for parent-child matching and boundary safety cases.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Add artifact_attestation(http, filename) and wire verifier support for
artifact bundle checks. Add docker_github_builder_bundle helper rule.
Handle runtime unknown http.checksum after eval so metadata resolve is
requested when checksum is missing.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Track denied source identifiers during policy evaluation and flag the policy
progress vertex as failed when BuildKit returns a matching DENY error pattern.
This improves the progress output of policy error and shows last
policy logs with the build error.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Turn the current utility used by policy helper commands that
allows getting gateway.Client lazily into reusable package.
This is preparation for using this utility also in the policy
verification, outside of commands.
Only expose SourceMetaResolver as other methods of gateway client
are not needed atm by any callers.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Make the code more unified between validation and
test command. Normalize to key without the input prefix.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
- Make sure tag is added to image reference as
containerd reference parser refuses to parse otherwise.
- When attestation is asked from non-index, return
nil instead of error. This is for consistency as likely
to fail in BuildKit before that is fixed separately.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This helper can be used to pin images to specific digest to opt-out
out upgrades or replay old builds.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Tonis Tiigi