tektoncd / tektoncd/chains

Chains should sign and attest to all Image Manifests in an Image Index

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#1,070 6 comments 1 reaction 0 assignees View on GitHub

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kind/feature
Dominant language
Go
Stars
277
Forks
164
Avg merge
2d 3h
Merged PRs (30d)
61

Description

Feature request

If Chains is provided with an Image Index to sign and attest, it should recursively perform this same behavior for all referenced Image Manfiests as well.

Use case

In order to improve the experience for increasing supported architectures for images, some build tasks may choose to always produce Image Index OCI artifacts even if there is only a single architecture referenced. As architectures are added to the Image Index, the Image Manifests should be signed without requiring that the specific pullspecs are included as results on the pipeline.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating Chains' existing Image Index signing and attestation entry point, then trace how referenced Image Manifests are discovered. Done means an Image Index causes every referenced manifest to receive the same signing and attestation behavior, including indexes with one or multiple architectures, with coverage added for this case.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
security
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
45/100

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