The architecture of trust

A doze registry is static files plus signatures — no server, no database, no login. This page is the operator’s precise map of what protects what. (Users get the narrative version in the trust model.)

The artifacts

<base>/<namespace>/<name>/index.yaml    # schema-1 module index, SIGNED
<base>/<namespace>/<name>/meta.yaml     # generated docs (prose; unsigned by design)

…plus <base>/index.json, the generated discovery catalog (doze modules search), derived from the above at build time.

Two signatures, two jobs

Per-artifact (releases.<v>.artifacts.<triple>.sig): ed25519 over the archive’s lowercase-hex SHA-256. This is the execution gate — the archive host is untrusted by design; a tampered download fails no matter who serves it.

Index-level (signature): ed25519 over the SHA-256 of a canonical-JSON payload of {module, namespace, releases, channels}. This is the selection gate — it makes the compatibility metadata attestable. Without it, a compromised host could serve a syntactically-valid index that lies about which engine versions a release supports, points the stable channel at an old vulnerable release (rollback), or withholds releases. With it, any such edit breaks verification. Byte-compatible implementations sign in the registry’s JS tooling and verify in the doze client’s Go — sorted keys, no insignificant whitespace, empty optionals omitted.

What each party can and cannot do

Party	Can	Cannot
Archive host (GitHub releases, S3…)	Deny service	Alter what runs (checksums signed), claim compatibility
Registry host / CDN	Deny service, serve stale-but-valid	Forge indexes, rotate channels, alter engine-support, swap keys (the key is compiled into doze)
Registry key holder	Publish any module	Retroactively change what locked projects run (locks pin checksums)
doze client	Refuse anything unverifiable	Be silently drifted (pins move only on explicit upgrade)

The last row is the point of the whole design: even a fully compromised registry can only affect projects at the moment they explicitly resolve or upgrade — never a locked, cached project, which resolves offline.

Key custody

The private key exists in exactly one place: the publishing environment (a CI secret for the official registry). It never touches the archive host, the module repos, or any build machine. The public key is compiled into doze: a client never fetches it, so there is no first contact to intercept and no key for a registry host to substitute. Consequences for rotation are real; see operations.

The lifecycle in one diagram

module repo CI ── builds archives + unsigned index ──▶ archive host (untrusted)
                                                            │
registry publish (holds the key) ◀── fetches, verifies expected release
        │  signs artifacts + index, commits
        ▼
static registry ── validate (offline: every signature)
        │          validate --remote (archives match signed checksums)
        ▼
     deploy ──▶ CDN ──▶ doze clients (verify everything again, pin, lock)

Every arrow assumes the previous step might be hostile.