Files
PiCloud/caddy/Caddyfile
MechaCat02 3ac1022c33 fix(audit-2026-06-11/H-1): request-body ceilings (Caddy proxy + email-inbound webhook)
- Caddy request_body { max_size 12MB } in both Caddyfiles — a hard
  ceiling replacing Caddy's multi-GB default; 12MB clears the
  orchestrator's 10 MiB user-route read. Validated with caddy validate.
- email-inbound router gets an explicit DefaultBodyLimit::max(1MB):
  the public unauthenticated webhook previously rode Axum's 2MB
  extractor default; tightened so a flood can't force large
  allocation + JSON parse per request.

Admin / execute handlers keep Axum's 2MB extractor default (already
bounded); the user-route path keeps its explicit 10 MiB manual read.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-12 18:29:55 +02:00

109 lines
3.7 KiB
Caddyfile

# PiCloud dev Caddyfile.
#
# Routing topology:
# /healthz, /version → picloud (liveness + version, k8s-friendly)
# /api/v1/admin/* → picloud (manager control plane)
# /api/v1/execute/{id} → picloud (orchestrator ID-based bypass)
# /api/* → 404 (unsupported / sunset API version)
# /admin/* → dashboard SPA (mounted with paths.base=/admin)
# everything else → picloud (orchestrator route table; user paths)
#
# The "everything else → picloud" rule is what makes user-defined paths
# like /greet possible. picloud's matcher answers them via the routes
# table, or returns 404 with a precise JSON error.
#
# When v2 of the API ships, add `handle /api/v2/admin/* { ... }` etc.
# alongside the v1 handles, before the catch-all `/api/*` 404.
#
# Audit 2026-06-11 (H-A1/2/3, M07-06/07/08/09): defense-in-depth headers.
# CSP / X-Frame-Options / Permissions-Policy / no-store land on the
# dashboard SPA and admin API; nosniff + Referrer-Policy land everywhere.
# User-route responses (catch-all `handle`) deliberately get NO CSP —
# user scripts own their own response headers by design.
# `?` operator = "default if missing" so a downstream response (e.g. the
# file-download endpoint with its own restrictive CSP) wins.
{
auto_https off
admin off
log {
output stdout
format console
}
}
:80 {
# Audit 2026-06-11 (H-1) — hard request-body ceiling at the proxy.
# Without this, Caddy forwards bodies up to its multi-GB default to
# picloud. 12 MB sits just above the orchestrator's 10 MiB user-route
# read so legitimate large invokes pass; admin / email handlers are
# bounded far tighter by their own Axum extractor limits.
request_body {
max_size 12MB
}
# Baseline headers applied to every response.
header {
X-Content-Type-Options "nosniff"
Referrer-Policy "no-referrer"
}
handle /healthz {
reverse_proxy picloud:8080
}
handle /version {
reverse_proxy picloud:8080
}
handle /api/v1/admin/* {
header {
?Content-Security-Policy "default-src 'none'; frame-ancestors 'none'; base-uri 'none'"
?X-Frame-Options "DENY"
?Cache-Control "no-store"
?Permissions-Policy "geolocation=(), camera=(), microphone=(), payment=(), usb=(), accelerometer=(), gyroscope=()"
}
reverse_proxy picloud:8080
}
handle /api/v1/execute/* {
reverse_proxy picloud:8080
}
handle /api/* {
respond 404 {
body "{\"error\":\"no such API version see /version for supported routes\"}"
close
}
}
# Dashboard SPA at /admin. Its internal Caddy serves files from /srv
# (root); we don't strip the prefix because SvelteKit was built with
# paths.base = '/admin' so the bundle's URLs already include it.
handle /admin/* {
header {
?Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'self'; frame-ancestors 'none'; base-uri 'none'; form-action 'self'"
?X-Frame-Options "DENY"
?Cache-Control "no-store"
?Permissions-Policy "geolocation=(), camera=(), microphone=(), payment=(), usb=(), accelerometer=(), gyroscope=()"
}
reverse_proxy dashboard:80
}
handle /admin {
# Bare /admin (no trailing slash) — let SvelteKit's SPA handle it.
header {
?Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'self'; frame-ancestors 'none'; base-uri 'none'; form-action 'self'"
?X-Frame-Options "DENY"
}
reverse_proxy dashboard:80
}
# Everything else → picloud's user-route fallback. If no route
# matches, picloud responds 404 with a JSON body.
handle {
reverse_proxy picloud:8080
}
log {
output stdout
format console
}
}