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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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package twice
Chromium CVEs are fixed in Electron releases, and a client built against
an old one ships those holes to every user. That is a certain harm; a
build that breaks on a new Electron is a repairable one. build-client.sh
now bumps to the latest on every build, prints the comparison, and lets
the build fail if it cannot cope — the failure is the signal to fix, not
a reason to stay behind. It writes package.json and the lockfile on
purpose: the new pin is meant to be committed. A registry it cannot reach
is a warning, not a failure.
Exercised by pinning back to 42.9.2 and building: "==> Electron 42.9.2 ->
44.1.1", exit 0, electron=44.1.1 in the packaged output. Note npm audit
would have said nothing about any of this — Chromium CVEs fixed in
Electron do not reliably reach the npm advisory database.
Separately, package.json declared linux.target [deb, rpm] with its own
deb/rpm depends, so `npm run dist` built a second package under the same
name. The two had drifted: /opt/MeshBay/meshbay-client against
/opt/meshbay-client/meshbay, and Depends: python3-meshbay-common naming
none of the Electron runtime libraries the real DEBIAN/control lists — it
would have installed cleanly and then refused to start. Nothing in the
tree referenced `npm run dist`, which is why the drift was free to
happen. That config is gone, "dist" delegates to build-client.sh, and
test_desktop_shell.py refuses its return.
`--dir` was re-run with no linux block at all: exit 0, same binary
build-client.sh consumes. It needs appId, productName and files, nothing
else.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AbwJDbNTkiRUh7HTWEoyss
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npm audit reported 12 findings (11 high, 1 critical), every one transitive
and every one reached through electron-builder. The critical was tar
(<=7.5.20), a family of path-traversal and symlink-poisoning advisories.
electron-builder is a devDependency and build.files is src/** and ui/**,
so none of it ships: the exposure was to whoever builds a release, not to
users. Real, since a build machine producing signed artefacts is worth
attacking, but it should not have been read as "the client has a critical
vulnerability".
electron-builder ^26.15.3 takes the audit to 0 on its own. It is a major,
so it was measured rather than assumed: a --dir Linux build passed before
and after, and the config used here (appId, files, linux.target,
deb/rpm.depends) is nowhere near where 26's breaking changes are. The
produced app.asar is not byte-identical to 25's, which matters only for
18.7's hash-and-compare story and is a release note, not a defect.
electron ^42.11.1 is a patch bump inside the range already declared, where
Electron ships its security backports. The built binary was launched under
xvfb: two processes alive after 25s, empty log. That is the part that
counts — test_desktop_shell.py pins the security contract by reading
source, so it would stay green through any runtime regression.
protobufjs's override floor goes ^7.5.5 -> ^7.6.5. The override itself is
load-bearing and must stay: removing it drops castv2-client's protobufjs
to 6.11.6, which carries a critical RCE advisory — and unlike everything
above, protobufjs ships inside the application. But ^7.5.5 permitted 7.5.5,
which is inside a high advisory's range (<=7.6.4); npm happened to resolve
7.6.6, so the protection was incidental rather than structural.
Electron 44 is deliberately not taken here: two majors and a different
Chromium, and nothing in the suite would notice a regression. It needs its
own launch session.
Audit and evidence: ~/next/npm-audit.md (not in the repo).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AbwJDbNTkiRUh7HTWEoyss
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Shared venv architecture: meshbay-common owns the Python venv with all
pip deps pre-installed; hub and node add only their code into it.
Client is a standalone Electron app. No pip runs at install time.
- Add build scripts (packaging/build/) for common, hub, node, client
- Add orchestrator build-packages.sh with deb/rpm auto-detection
- Add .deb control/postinst for all 4 packages
- Add .rpm specs for all 4 packages (replaces python3-meshbay-common)
- Add Gnome .desktop launcher and icon resizing
- Add firewalld services (meshbay-cast, meshbay-node) and UFW profiles
- Update systemd units to use /opt/meshbay-common/venv/bin/ paths
- TMDB token baked into node package at build time via QE/node.env
- Fix package-lock.json sync for protobufjs override
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Re-serve decrypted fMP4 video over HTTP on the LAN so a Chromecast can
play the stream. The relay runs in the Electron main process — same trust
boundary as downloads and MSE playback.
- cast-relay.js: HTTP server with BoxAccumulator (reassembles WebRTC
chunks into moof+mdat pairs), ring buffer, backpressure, finish() for
clean end-of-stream, fixed port range 19550-19553
- cast-chromecast.js: mDNS discovery (bonjour-service) + CASTV2 protocol
(castv2-client), connect/reload/disconnect lifecycle
- Seek-aware: relay restarts on every seek, Chromecast reloads new URL;
generation counter prevents stale async errors from killing active
restarts; landingPlayheadRef suppresses programmatic seeking events
- Device picker in video top bar with scan, device selection, copy-URL
fallback, and cast status indicator
- IPC bridge (main/preload/platform) for start/push/stop/finish/status/
discover/chromecastConnect/chromecastReload/chromecastDisconnect
- Phase 3 design doc for DLNA/Smart TV in docs/cast-smart-tv.md
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Electron 42 / Chromium 148, launched under xvfb. The packaged interface mounts
over `app://` with a secure context, `crypto.subtle` present, Argon2 WASM
loaded, and no console errors. Three statements in the design were wrong, and
only launching it found them.
**A CSP in a `<meta>` tag silently drops `frame-ancestors`.** Chromium says so
in the console. A policy carrying a directive that does nothing is worse than
one without it, so the policy is sent as a header by the protocol handler —
which is also the only thing serving the interface, so one source instead of
two.
**`secure: true` is not what makes the service worker register.** Chromium
refuses a worker on a custom scheme whatever its privileges: "The URL protocol
of the current origin ('app://meshbay') is not supported". The application has
no service worker and needs none — it saves through a native dialog, which is
the better of the two paths. `sw.js` stays in the package because the same files
serve the browser, where it is one of only three ways to write a large file.
What `secure: true` is actually for was measured at the same time: without it
**the whole of `crypto.subtle` is undefined**. The first probe loaded a `data:`
URL and every algorithm failed with TypeError, AES-GCM included — which is why
the probe was rewritten before believing its answer. X25519 and Ed25519 are both
present on Chromium 148, settling the version floor left open as O6.
**The renderer cannot call the hub.** Its origin is `app://meshbay` and CORS
refuses it. The hub has *no CORS middleware at all* — its API is reachable from
no web origin whatever — and that is worth keeping. Widening it for
`app://meshbay` would be worse than it looks: that origin is not a credential,
since any Electron application can claim the same scheme and host name.
So every hub call leaves from the main process, exactly as saving a file does,
and it refuses any origin that is not the hub the user signed in to.
`platform.apiFetch()` is `fetch` in a browser and the bridge in the application,
so no caller has to know which it got. `transport.js` reaches it through a
global because it is a classic script, not a module — the alternative was a
second fetch path, which is how two callers of one hub start disagreeing about
how to reach it.
Verified from inside Electron: the main process gets 200 from
/v1/hub/version, the renderer is refused by CORS, and **a script served by the
hub is refused by the policy** — T3's mitigation demonstrated rather than
asserted.
Build note, written into the README because it will bite the next person:
**Ubuntu 24.04's nodejs 18 cannot install Electron at all** — the download
script `require()`s an ESM module, which Node gained in 22. Node 24 LTS,
checksum-verified against nodejs.org, is what this was built with.
package-lock.json is committed; builds use `npm ci`, not `npm install`.
799 tests pass, e2e.py still passes end to end. The session harness needed a
platform stub: it lifts `hubFetch` out of app.js as text and runs it, so the
adapter is now part of the environment it models.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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