* Bridge dedup keys on a content-derived stable mesh message ID
Public mesh messages carry no message ID on the BLE wire, so every
non-origin device minted a fresh UUID and the bridge's m-tag dedup only
matched on the origin device: duplicate bridged rows, misattributed
"across the bridge" counts, redundant downlink rebroadcasts, and an
m-tag spoof vector (an attacker could claim a victim's message ID).
Every device now derives the same stable ID from the signed wire fields
(sender ID + ms timestamp + trimmed content, SHA256/32 hex) via the new
MeshMessageIdentity — zero BLE wire change. The bridge event's m tag
carries the origin coordinates ["m", senderIDHex, timestampMs] and
receivers recompute the key from those plus the event's own content
instead of trusting a claimed ID; old-format/absent tags fall back to
the event ID as before.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* Fix mixed-version message loss: m tag leads with the derived stable ID
The previous layout (["m", senderIDHex, timestampMs]) broke v1.7.0
receivers: their parser takes m[1] unconditionally as the timeline
dedup key whenever the tag has >= 2 elements, so every bridged message
from a new-version sender keyed on the CONSTANT sender hex and
inject-dedup dropped all but the first. The tag is now
["m", <derived stable ID>, senderIDHex, timestampMs]: old parsers get a
per-message-unique m[1] (exactly today's semantics), while the new
parser recomputes the ID from elements 2-3 plus the event's own content
and never trusts element 1, keeping the recompute-don't-trust property.
Also:
- Soften the overstated security claim in MeshMessageIdentity and the
BridgeService classify comment: forging a chosen ID onto different
content is infeasible, but all three hash inputs are cleartext on the
radio, so identical-content front-running by a radio-local attacker
remains possible (no worse than the unbridged mesh).
- Fix the stale archivedEchoKeys rationale: re-synced copies of others'
messages now carry the derived stable ID (insert-by-ID catches them);
the content key remains for echo--prefixed archive rows + self echoes.
- Tests: old-parser semantics on the new tag (m[1] per-message-unique
and equal to the derived ID) and a forged-m[1] event that cannot
pre-poison a genuine message's dedup slot.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---------
Co-authored-by: jack <jackjackbits@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Store-and-forward previously delivered to an out-of-range peer only if a
mutual favorite happened to be connected at send time and later met the
recipient directly, and everything except courier envelopes died with the
app process. This closes those gaps end to end:
- Persist the MessageRouter outbox to disk, sealed with a ChaChaPoly key
held only in the Keychain (no plaintext at rest); queued private
messages now survive an app kill and flush on next launch.
- Deposit retry: queued messages are re-deposited whenever a new eligible
courier connects, tracked per message so the same courier is never
double-burned, until 3 distinct couriers carry it or it expires.
- Tiered open couriering: signature-verified strangers can now carry mail
(2 envelopes/depositor into a 20-slot pool) alongside mutual favorites
(5 each); overflow evicts verified-tier mail before favorites'.
- Spray-and-wait: envelopes carry a copy budget (4, capped 8, new TLV,
wire-compatible with old clients); couriers split half their remaining
budget with each newly encountered courier so mail diffuses through a
moving crowd.
- Remote handover: a verified relayed announce now floods a copy toward
the multi-hop recipient (directed-relay treatment, 10-min per-envelope
cooldown) while the carried original stays put for a direct encounter.
- Public history: gossip-sync window for whole public messages widened
from 15 min to 6 h, matched on the receive-acceptance side, and the
message store persists to disk so devices bridge partitions and
restarts ("town crier").
- Privacy-safe local delivery counters (bare tallies, log-only) so the
store-and-forward stack is measurable on-device.
- Panic wipe now also clears the sealed outbox, gossip archive, and
counters.
- Rewrite WHITEPAPER.md to describe the app as implemented (Noise XX/X,
actual flood control, courier system, gossip sync, Nostr path); the old
document described a bloom filter, three fragment types, and a
MessageRetryService that don't exist.
1037 macOS tests pass (17 new); iOS builds.
Co-authored-by: jack <jackjackbits@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
The public-message signature check fell back to signedSenderDisplayName,
which only searches the asynchronously-persisted identity cache. Because
the peer registry is updated synchronously on a verified announce, a
message arriving immediately after that announce could have a valid
signature and a verified registry entry yet still be dropped (cache not
caught up).
Verify the packet signature against the signing key already present in
the synchronously-updated peer registry first; fall back to the
persisted-identity lookup only for peers not yet in the registry. The
security property is unchanged: a spoofed senderID claiming a registry
peer still fails registry verification and the persisted fallback, and
is dropped.
Adds tests for the race (delivered via registry key before cache
persists) and the spoof case (invalid signature falls back and drops).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
A broad audit surfaced ten critical/high issues across the crypto,
transport, identity, and panic-wipe layers. This fixes all ten.
Critical:
- Nostr DMs were unauthenticated. The NIP-17 seal was signed with a
throwaway ephemeral key and the receiver never verified it, so anyone
who knows a recipient's npub could forge messages (and delivery/read
receipts) into an existing trusted conversation. The seal is now
signed with the sender's real identity key, and the receiver verifies
the seal signature and that seal.pubkey == rumor.pubkey.
NOTE: this is a breaking wire-protocol change (see PR).
- Public BLE messages trusted registry membership instead of the packet
signature. Since senderID is attacker-controlled, any verified peer
could be impersonated in public chat. A valid signature from the
claimed sender is now required before any registry identity is used.
- Unverified announces still persisted the announced identity, letting a
replayed noisePublicKey overwrite a victim's stored signing key and
nickname. persistIdentity is now gated on verification.
High:
- Noise decrypt trapped on a 16-19 byte ciphertext (negative prefix
length after nonce extraction) — a remote crash. Now validated.
- Identity-cache debounce save used Timer.scheduledTimer on a GCD queue
with no run loop, so it never fired; block/verify/favorite changes
only persisted on explicit forceSave. Replaced with a
DispatchSourceTimer on the queue; forceSave is now serialized.
- Identity-cache key load couldn't tell "missing" from a transient
keychain failure and would regenerate (deleting) the key, orphaning
the cache. Now uses getIdentityKeyWithResult and falls back to a
session-only ephemeral key without clobbering the persisted key/cache.
- BLE receive-dedup key lacked a payload digest, so post-handshake
flushes (queued msgs + delivery/read acks in the same ms) were dropped
as duplicates. Digest added, matching the ingress registry.
- Maintenance timer was created only in init and never recreated after a
panic stop/start, silently degrading the mesh until app restart. Now
recreated in startServices.
- Panic wipe left persisted location state (selected channel, teleport
set, bookmarks) and cached per-geohash Nostr private keys behind. Both
are now cleared.
- Panic spawned an orphan NostrRelayManager instead of reusing .shared,
splitting relay state from every other component. Now reuses .shared.
Tests updated to assert the fixed behavior (announce no longer persists
unverified identities; public messages require a signature; receive
dedup ID includes the payload digest).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
BLEService's per-packet-type orchestration moves into owned, tested
components (BLEAnnounceHandler, BLEPublicMessageHandler,
BLENoisePacketHandler, BLEFileTransferHandler, BLEFragmentHandler),
each taking an environment struct of closures so every queue hop stays
in BLEService and the handlers are synchronously testable. Behavior is
preserved verbatim, including Noise session recovery on decrypt failure
and single-block UI event ordering. handleLeave/handleRequestSync stay
in place as already-thin delegations. BLEService drops to 3393 lines.
Four coordinators (delivery, private conversation, Nostr, public
conversation) drop their unowned/weak ChatViewModel back-references for
narrow @MainActor context protocols, with ChatViewModel conformances as
single shared witnesses for overlapping members. Their true coupling is
now an explicit, reviewable surface, and each gains a mock-context test
suite covering flows previously testable only through the full view
model. Delivery/read acks now also clear the router's retained-send
outbox via the delivery context.
New LargeTopologyTests exercise production-shaped meshes with the
in-memory harness: an 8-peer relay chain with per-hop TTL decay, a
14-peer cyclic mesh with exactly-once delivery, partition/heal, and
topology churn.
App-layer runtime/model files updated alongside.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
