Pre-auth DoS hardening (audit H1, Critical). The control-plane middleware
read the request body with io.ReadAll before authenticating and with no size
cap, so an unauthenticated peer could force the server to buffer an arbitrary
body in RAM (the auditor sent 400 MB and watched RSS climb to ~898 MB).
- ServeHTTP now caps the buffered body before reading: a per-route ceiling
(1 MiB JSON, 16 MiB /blobs) rejects an over-declared Content-Length outright
and wraps the body in http.MaxBytesReader so a lying/chunked sender trips at
the ceiling instead of unbounded.
- handlePutBlob maps the MaxBytesReader cutoff to 413 in every auth mode.
- Per-IP token-bucket rate limiter (golang.org/x/time/rate, already in the
module graph) sheds floods before auth or body reads. Loopback dev stacks are
unaffected (burst >> any single client's rate). Kept in-package as transport
glue, not promoted to the registry, mirroring the nonceCache decision in 0003.
- membershipd sets http.Server.MaxHeaderBytes and ReadHeaderTimeout.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Opens the store before NATS so the authenticator can consult IsAuthorized.
Under --bus-auth enforce the embedded NATS gets the nkey authenticator (only
allowlisted identities connect); --tls-cert/--tls-key make it present the
server certificate and require TLS. External NATS manages its own auth/TLS.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Maps off|soft|enforce to membership.AuthMode and wires it into NewServer.
Defaults to off so existing deployments are unaffected until the operator
opts into the rollout.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Local administration surface for the user allowlist, dispatched before the
server flag set parses os.Args. It opens the SQLite store directly with no
network or auth: running on the bus host is trusted by design, which is how
the first admin is seeded (breaking the chicken-egg of needing an admin to
add an admin). Validates that sign-pub is a 32-byte Ed25519 key in hex and
tolerates the sign-pub positional appearing before or after --db.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add a --bind flag (default 127.0.0.1) to membershipd that controls which
network interface both the control-plane HTTP API and the embedded NATS data
plane listen on. Use 0.0.0.0 to expose the stack to the LAN so remote peers
(phones, other PCs) can connect; keep the default for a loopback-only dev stack.
embeddednats gains StartHost(storeDir, host, port) for explicit interface
control; Start stays a backward-compatible wrapper (host "" = nats default
0.0.0.0) so the playground and tests are untouched.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
egutierrez
agent