feat(sbom): generate CPE for PM specific components#151
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Add github.com/facebookincubator/nvdtools (wfn subpackage) to build and validate CPE 2.3 identifiers for pm-managed components. wfn provides the Well-Formed CPE Name binding (BindToFmtString) and parser (UnbindFmtString) used by the new pkg/sbom/cpe package, which ports the vendor/product heuristics from Anchore syft without depending on the full syft module. Pulling all of syft was rejected because its dependency tree bumps docker/buildah to versions incompatible with werf's pinned forks. Net effect is a single new direct dependency. Signed-off-by: Radmir Khurum <radmir.khurum@flant.com>
Add pkg/sbom/cpe, which infers CPE 2.3 identifiers for pm-managed components using vendor/product heuristics ported from Anchore syft on top of nvdtools/wfn: - URL-to-vendor extraction (github/gitlab owner, curated host prefixes) - curated vendor/product overrides (curl->haxx, brotli->google, ...) - upstream name normalization (strip -devel/-libs/-dev, stream version) - hyphen<->underscore delimiter variations and separator sub-selections - trailing-digit variations and known-vendor (apache) preference - specificity-based ordering Package binaries built by pm are typed pkg:generic in the SBOM; vulnerability scanners match those C/C++ components through CPE rather than purl, so without a CPE they get no CVE matches. The delimiter and sub-selection variations widen recall to the forms NVD actually records. os_pm attaches the most specific CPE to component.cpe and the remaining candidates as evidence.identity. pm components keep flowing through the external-reference resolver (which understands the containerFactoryVersion purl qualifier) — the CPE is additive and does not change that path. Copied heuristics carry Apache-2.0 attribution to syft; see NOTICE. Signed-off-by: Radmir Khurum <radmir.khurum@flant.com>
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Jul 6, 2026
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