8b5a02b3ef
Two gaps:
1. /api/v1/admin/apps/{id}/triggers/email accepted `inbound_secret: null`
and treated it as "this trigger is unsigned". The runtime then
skipped HMAC verification entirely. URL discovery (logs, ops
dashboards, bruteforce on the 122-bit TriggerId space) then fan-out-
amplified into the outbox for free — anonymous DoS via the
dispatcher.
2. Even signed triggers had no per-trigger rate limit on signature-
verify failures, so an attacker who knew the URL could pump unsigned
POSTs to force Argon2-equivalent work (HMAC verify + nonce-dedup +
stored-secret decrypt) at line rate.
Fix:
* triggers_api::create_email_trigger now requires a non-empty
inbound_secret. 400 on missing / empty / whitespace-only.
* email_inbound_api::receive_inbound_email returns 401 immediately when
the resolved target has no inbound_secret_encrypted column (pre-fix
rows). The previous `if let Some(ct), Some(nonce)` branch is gone.
* New `BadSignatureLimiter`: per-`(app_id, trigger_id)` sliding-window
bucket (10 fails / 60 s). On lockout the receiver returns 429 with
Retry-After instead of 401. record_failure runs on both the
"no-secret" 401 path and any verify_signature failure.
Test fallout:
* email_inbound integration tests that relied on None secret: removed
the now-impossible `unsigned_trigger_accepts_without_signature` test,
replaced with `create_without_inbound_secret_is_rejected` covering
null / "" / " "; updated `malformed_body_is_422` and
`cross_app_path_is_404` to pass + sign with a secret.
* Two new unit tests pin the limiter behavior (burst lockout + per-
trigger independence).
Audit refs: security_audit/08_dos_resource.md#h-3,
security_audit/09_external_integrations.md#f-ext-m-001.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
PiCloud
A lightweight, self-hosted, event-driven serverless compute platform. Upload a Rhai script, get an HTTP endpoint. Designed to run on a single modest server with no idle CPU cost, and to scale out to a small cluster when you need it.
Status: Phase 1 — MVP scaffolding in progress.
The authoritative design lives in
serverless_cloud_blueprint.md.
Why
Existing serverless platforms are either cloud-locked, heavyweight, or both. PiCloud aims for the opposite end of the spectrum: one binary, one database, one reverse proxy — running on hardware you already own.
Architecture (one paragraph)
PiCloud splits into three logical services — manager (control plane: scripts, schedules, dashboard), orchestrator (per-node event ingress and dispatch), and executor (per-node Rhai sandbox) — each backed by a *-core Rust library. In MVP they run in a single process; in cluster mode they run as three binaries with one manager and one orchestrator + executor per node. Caddy fronts everything; PostgreSQL is the single source of truth.
See CLAUDE.md for working notes and serverless_cloud_blueprint.md for the full design.
Quick Start
Coming as scaffolding lands. For now:
# Rust toolchain (pinned via rust-toolchain.toml)
cargo check --workspace
# Run the all-in-one MVP binary (once main.rs is wired up)
cargo run -p picloud
Repository Layout
crates/
shared/ cross-cutting types
executor-core/ Rhai engine + sandbox
orchestrator-core/ event ingress, dispatch
manager-core/ control plane
picloud/ MVP all-in-one binary
picloud-{manager,orchestrator,executor}/ cluster-mode binaries (skeleton)
dashboard/ SvelteKit
caddy/ Caddyfile
docker/ Dockerfiles
docs/
git-workflow.md Trunk-based workflow
Contributing
See docs/git-workflow.md for the branching and commit conventions. TL;DR: trunk-based, short-lived branches, Conventional Commits, no force-pushing main.
License
TBD.