forked from unom/punktfunk
Both pack scripts fell back to a fresh `New-SelfSignedCertificate` whenever MSIX_CERT_PFX_B64 was absent, and said nothing about it beyond one Write-Host. That fallback is right for canary and dev builds. On a tag it is not: an ephemeral cert is regenerated per build, so nobody can pin it, and a release signed with one is indistinguishable from a release signed by whoever else got to the artifact. A secret that got renamed, rotated away, or simply wasn't inherited by a new workflow would have downgraded a real release silently and shipped it. pack-msix.ps1 and pack-host-installer.ps1 now resolve -RequireSignedCert (default 'auto' = true iff GITHUB_REF is refs/tags/v*) and throw instead of falling back; pack-host-installer.ps1 also refuses -NoSign on the same condition. Reading GITHUB_REF inside the scripts rather than taking a workflow flag means a future packaging workflow inherits the guard instead of having to remember it. No effect on today's releases: MSIX_CERT_PFX_B64 / MSIX_CERT_PASSWORD are both set as repo secrets, so the supplied-cert branch is the one tag builds take. This only closes the trapdoor underneath it. Verified on the windows-amd64 runner: both files parse, and the guard resolves true for refs/tags/v0.21.0, false for refs/heads/main and for an unset ref, with 'true'/'false' overriding as intended. Not touched: the pf-vdisplay / gamepad driver builds use the same pattern with DRIVER_CERT_PFX_B64, which has no secret behind it — those need attestation signing (a Partner Center action), and a guard there would just fail every tag. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>