timothyswan/cosign repository overview

⁠cosign — RHHI rebase

cosign⁠ is the Sigstore tool for signing and verifying container images and OCI artifacts. This image is rebuilt from source on Red Hat Hardened Images⁠.

⁠Build

• Base: hi/go:latest-builder (build) → hi/core-runtime (runtime)
• Source pin: full upstream commit SHA recorded in build.yml
• Version embedding: -X sigs.k8s.io/release-utils/version.gitVersion
• CGO disabled, -trimpath, local toolchain only
• Note: PIV/PKCS11 smart card support omitted — requires CGO_ENABLED=1 and C libraries incompatible with the distroless runtime base

⁠Supply-chain attestations

Every image tag carries:

• cosign signature (key-only, no Rekor transparency log)
• CycloneDX SBOM attached as OCI attestation
• SLSA v0.2 provenance attached as OCI attestation
• OpenSSF Scorecard: 8.1 / 10

⁠Verify

cosign verify-attestation --key <cosign.pub> --type cyclonedx <image>@<digest>
cosign verify-attestation --key <cosign.pub> --type slsaprovenance <image>@<digest>

⁠Tags

Tags follow the pattern <upstream-version>-rhhi (e.g. v3.0.6-rhhi). Always pin by digest in production, not by tag.