Miles WardandClaude Opus 4.8
f33effe20a
Rust workspace serving a Google/Microsoft-Authenticator-style web UI, with
each account's rotating code mirrored into Discord as a message that
rewrites itself in place as the code rolls.
The live mechanism is webhook message editing: POST ?wait=true returns the
message id, PATCH .../messages/{id} rewrites it thereafter. Two approaches
were evaluated and rejected — an externally-hosted image URL is cached by
Discord's media proxy and, worse, must be anonymously reachable, which would
publish live codes on an unauthenticated endpoint; and an animated countdown
drifts out of phase because playback starts at decode time, not on a wall
clock. The countdown instead uses Discord's <t:unix:R> markup, which the
client re-renders every second for free.
Codes are also sent as text in a fenced block so they stay copyable, with
the grouped, readable form on a rendered WebP tile.
- core: RFC 6238 TOTP over HMAC, lenient otpauth:// parsing (issuer conflicts
and non-canonical base32 both occur in the wild), XChaCha20-Poly1305 vault,
Argon2id admin auth
- discord: webhook client with a serialising rate limiter (~2 req/s) so
globally-aligned rollovers don't burst, and error classification that
distinguishes a deleted message (repost) from a dead webhook (stop)
- render: SVG -> WebP tiles via resvg with embedded JetBrains Mono
- http-api: axum, session auth, QR decode with a rescale/contrast/rotation
retry ladder
- webui: offline vanilla JS, Beautiful UI design language, light and dark
Ships as a 27 MB Alpine image (about 8 MB to pull); the binary is fully static musl with no
OpenSSL and no C dependencies, cross-compiled via cargo-zigbuild so building
linux/amd64 on Apple Silicon needs no QEMU.
101 tests, including the RFC 6238 vectors, QR round-trips, and the live push
cycle exercised against a mock Discord.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
2.5 KiB
Publishing to Gitea
Everything here needs a Gitea personal access token, which is why it isn't automated: the token should only ever exist in your own shell.
Create one at Gitea → Settings → Applications → Generate New Token with scopes:
write:repository— to create the repo and pushwrite:package— to push the container image
Export it once per shell session:
export GITEA_TOKEN='<paste-your-token>'
1. Create the repository
curl -s -X POST "https://gitea.milesward.dev/api/v1/user/repos" -H "Authorization: token $GITEA_TOKEN" -H "Content-Type: application/json" -d '{"name":"Discord-Authenticator","description":"Self-hosted TOTP authenticator with live Discord delivery","private":true,"auto_init":false}'
"private": true is deliberate. The repo is harmless on its own, but this is
tooling that handles second factors — there's no reason to publish it by
default. Change it if you decide otherwise.
2. Push the code and the tag
cd "/Users/casperadmin/Discord Authenticator" && git -c "http.extraHeader=Authorization: token $GITEA_TOKEN" push -u origin main --follow-tags
That pushes main and the v0.1 tag together.
3. Push the container image
The image is already built and tagged locally as
gitea.milesward.dev/mward4/discord-authenticator:0.1 and :latest.
printf '%s' "$GITEA_TOKEN" | docker login gitea.milesward.dev --username mward4 --password-stdin && docker push gitea.milesward.dev/mward4/discord-authenticator:0.1 && docker push gitea.milesward.dev/mward4/discord-authenticator:latest && docker logout gitea.milesward.dev
If the image isn't built (a fresh machine, say), scripts/build-and-publish-unraid.sh
does the clone, build, login and push in one pass:
GITEA_TOKEN="$GITEA_TOKEN" ./scripts/build-and-publish-unraid.sh
4. Deploy on Unraid
Add a container with Repository set to:
gitea.milesward.dev/mward4/discord-authenticator:0.1
Since the package is in a private registry, add the Gitea credentials under Unraid's Docker → Registries first, or the pull will 401.
Map /var/lib/discord-authenticator to /mnt/user/appdata/discord-authenticator,
publish port 8710, and leave networking on bridge.
Or import deploy/unraid/discord-authenticator.xml into
/boot/config/plugins/dockerMan/templates-user/ to get all of that prefilled.
Afterwards
Confirm the token isn't left lying around in your shell history:
unset GITEA_TOKEN