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authorChristophe Besson <cbesson@gmail.com>2026-09-07 17:50:28 +0200
committerChristophe Besson <cbesson@gmail.com>2026-09-07 17:50:28 +0200
commit36cebf25d0e0f24cf63be4380ccb5d03da726a74 (patch)
tree8509ec4cf68a058f7383299e11bdea97ab06cadf /packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
parent8883d60d0afa2ed9dd1ef68bc21fe1b9a65a59ff (diff)
downloadmeshbay-36cebf25d0e0f24cf63be4380ccb5d03da726a74.tar.gz
feat(chat): encrypt group chat under per-device epoch keys (MNP 2.0)
Chat messages are sealed with AES-256-GCM under a key derived per group, per epoch, per *device*, and signed over the ciphertext with the device key the node pinned. The node relays and archives; it cannot read a message. There is no switch. MNP goes to 2.0 and MNP_MIN_SUPPORTED moves with it, so a 1.x peer is refused at the handshake with `version_too_old` rather than admitted and then unable to speak. An opt-in flag was designed and rejected: every node is a test node, so it would have bought nothing and left a plaintext branch reachable — C6's lesson one feature later. A test reads the source and refuses any code that consults a `chat_encrypted` setting. Not Sender Keys, and `senderkeys.py` is now documented as unused. With distribution under the group key and a node that serves history to devices which were not present, the node must retain each chain's earliest key, and a chain key at iteration i yields every message key from i on by pure HKDF — forward secrecy is zero either way. What the ratchet was left buying was stateful client code with silent failure modes, three of them reproduced: any member could sign as any other, a second device dropped the first's chain, and the skipped-key cache grew without bound. The reasoning is in docs/chat-sender-keys.md, which is the specification and the decision record. Epochs, not rotation: the epoch key is wrapped under the group key at delivery and never stored under it, so `gek_rotate` is a re-wrap. A group-key-derived archive key would have made every message ever sent unreadable on the first `member unpin`, which is the documented step after removing a member. A new epoch opens on member revoke/unpin, device revoke and `gek_rotate`; old epochs are kept and still delivered, so history stays readable to everyone who could already read it, and nothing anywhere deletes one. Three prerequisites this needed, each a live defect on its own: * The peer registry was keyed by user_id, so one account's second device evicted the first and the broadcast skipped recipients by account — a person's phone never saw what they typed on their laptop. * The handshake authenticated an account, never a device. `device_hello` (additive, signed, refused unless the key is a live device of this account in the node's own roster) is what lets the node refuse a member claiming somebody else's key. * `_admin_exec_file_delete` authorized against the exact uploading key, so device linking had already broken deleting your own file from your other device. It now authorizes against any non-revoked device of `uploader_id`. Found by driving the real panel over the real transport, not by reading source: `chat_keys_resp` was routed by arrival order and handed to an unanswered `media_meta_req` — the original frozen-tab defect in a message type that did not exist when that probe was written. And `_asText` had been deleted with an unrelated helper beside it; its only caller sits inside a promise the panel catches, so every conversation rendered empty with nothing in the console. Existing node data is migrated by QE/migration/migrate_chat_encryption.py (not versioned, per the QE rule), run with the node stopped. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01TZZxYjz8YeWRz13xDi8LJr
Diffstat (limited to 'packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js')
-rw-r--r--packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js12
1 files changed, 12 insertions, 0 deletions
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
index c8cbd16..d63d4ae 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
@@ -670,6 +670,15 @@ export default {
'chat.unread': 'Nowe wiadomości',
'chat.jump_latest': 'Przejdź do najnowszych',
'chat.jump_new': 'Nowe wiadomości',
+ 'chat.unreadable': 'Nie udało się odczytać tej wiadomości',
+ 'chat.unreadable_signature': 'Niezweryfikowana wiadomość — podpis nie zgadza się z nadawcą',
+ 'chat.unreadable_epoch': 'Napisana, zanim to urządzenie mogło czytać tę rozmowę',
+ 'chat.unreadable_keys': 'Klucze czatu niedostępne — połącz się ponownie, aby to odczytać',
+ 'chat.unreadable_decrypt': 'Nie udało się odszyfrować tej wiadomości',
+ 'chat.unreadable_envelope': 'Ta wiadomość dotarła niekompletna',
+ 'chat.unreadable_format': 'Ta wiadomość wymaga nowszej wersji MeshBay',
+ 'chat.encrypted_needs_newer': 'Ta rozmowa jest zaszyfrowana i ten klient nie może jej odczytać — zaktualizuj MeshBay',
+ 'chat.encrypted_cannot_send': 'Ta rozmowa jest zaszyfrowana i to urządzenie nie może jeszcze w niej pisać',
'group.leave': 'Opuść grupę',
'group.leave_confirm': 'Opuścić grupę „{name}”? Utraci Pan(i) dostęp do jej plików i czatu. Wysłane pliki pozostaną na node, a node zachowa przypiętą dla Pana/Pani tożsamość do czasu, aż jego operator ją usunie.',
'group.mute': 'Mute notifications',
@@ -890,6 +899,9 @@ export default {
'settings_app.chat_no_writable_root': 'Ta grupa nie ma katalogu do zapisu, więc załączniki są wyłączone.',
'settings_app.chat_link_preview_label': 'Podglądy linków',
'settings_app.chat_link_preview_hint': 'Gdy członek wysyła link, węzeł pobiera tytuł i obraz strony. To żądanie z Twojego komputera do witryny wybranej przez kogoś innego.',
+ 'settings_app.chat_encrypted_always': 'Czat w tej grupie jest zawsze szyfrowany. Nie da się tego wyłączyć.',
+ 'settings_app.chat_rotate_epoch': 'Zmień klucz czatu',
+ 'settings_app.chat_rotate_epoch_hint': 'Członkowie nadal czytają całą historię. Osoba usunięta z grupy nie odczyta tego, co zostanie napisane od teraz. Usunięcie członka lub urządzenia robi to już samo.',
'settings_app.tmdb_token_prompt': 'Zarejestruj się w TMDB, aby wygenerować własny klucz API.',
'settings_app.tmdb_token_link': 'Pobierz klucz',
'settings_node.roots_offline_hint': 'Brak połączenia z węzłem — zmiany przechodzą przez węzeł lokalny i zaczną działać po jego następnym przeładowaniu.',