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feat(base,app,keys): keys of shared spaces, sealed to each member

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Step 3 of ADR 0044 (D3, D18, D19). A shared space's data keys are
sealed on a device to each member's public keys; the instance keeps
what devices sealed and never opens it.

- halkyon_keys: the safety code of two accounts' public keys
  (`safetyCode`), 60 digits, the same on both sides.
- halkyon_base: the register hands out accounts' public keys
  (`public-keys-of`, local and remote); the table `shared_space_key`
  and the endpoint `sharedSpaceKeys` (memberKeys, keysNeeded, seal,
  mine). Only the Owner and Editors seal, the first key sealed to a
  member stays, and a member's keys go with their membership. Every
  host's migration creates the table.
- halkyon_app: `ContentCipher` seals a key to another account and
  opens one sealed by another; `SharedKeys` shares a space's key with
  its members, seals keys to newcomers and opens the person's own,
  holding each member to the public keys `KeyPins` pinned on first
  sight (`key_pins.json` in the person's folder), a change refused
  until trusted anew.

Learn takes them into its `Privacy` in step 4.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
This commit is contained in:
Tizian 「ティツィアーン」 2026-11-11 11:28:13 +01:00
commit b72cea1fe0
Signed by: raisondetredev
GPG key ID: 07F6FCF405488B64
1 changed files with 105813 additions and 5 deletions
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2
packages/halkyon_app/lib/testing.dart
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@ -22,6 +22,7 @@ export 'src/testing/fake_oidc_browser.dart';
export 'src/testing/fake_password_gateway.dart';
export 'src/testing/fake_public_profile_gateway.dart';
export 'src/testing/fake_screen_guard.dart';
export 'src/testing/fake_shared_keys_gateway.dart';
export 'src/testing/fake_simplelogin_gateway.dart';
export 'src/testing/fake_speech_input.dart';
export 'src/testing/memory_account_key_store.dart';
@ -29,6 +30,7 @@ export 'src/testing/memory_account_wait_store.dart';
export 'src/testing/memory_file_cache.dart';
export 'src/testing/memory_file_saver.dart';
export 'src/testing/memory_instance_store.dart';
export 'src/testing/memory_key_pin_store.dart';
export 'src/testing/memory_look_store.dart';
export 'src/testing/memory_pending_changes_store.dart';
export 'src/testing/memory_sign_in_addresses.dart';