cipher/package.json
maverick 34c7ef08eb Add multi-device key sync: QR device linking + encrypted recovery code
Answers 'how do you get keys to login elsewhere' — both mechanisms, Signal/WhatsApp style:

Server:
- migration 0002: key_backups (recovery blobs) + provisions (QR relay), ciphertext only
- routes/backup.js: POST/GET /api/backup, /backup/exists; provision new/get/complete
- routes/keys.js: POST /api/keys/reset — atomically wipe stale prekeys + install fresh
  (fixes Bad MAC: restore regenerates prekey IDs that INSERT-OR-IGNORE kept stale)

Crypto (crypto.js):
- exportIdentityBlob/importIdentityBlob (identity travels only encrypted)
- generateRecoveryCode (120-bit Crockford base32) + encrypt/decryptWithCode (PBKDF2 250k)
- ephemeral ECDH (P-256) encrypt/decrypt for QR transfer

Client (app.js): account-menu 'Set up recovery code' + 'Link a device' (camera scan
via BarcodeDetector or paste); auth-screen 'Restore with recovery code' + 'Link from
another device' (shows QR + code, polls, restores). Vendored qrcode-generator.

All verified live end-to-end (3-process isolated-store integration tests):
restore-from-code and QR-link both let a fresh device receive + decrypt messages.
SW cache v3->v4.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-22 13:04:46 +10:00

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{
"name": "cipher",
"version": "0.1.0",
"private": true,
"description": "Cipher — end-to-end encrypted messenger (Signal Protocol) on Cloudflare",
"type": "module",
"scripts": {
"dev": "wrangler dev",
"deploy": "wrangler deploy",
"db:migrate:local": "wrangler d1 migrations apply cipher --local",
"db:migrate": "wrangler d1 migrations apply cipher --remote"
},
"dependencies": {
"hono": "^4.6.14"
},
"devDependencies": {
"@privacyresearch/libsignal-protocol-typescript": "^0.0.16",
"buffer": "^6.0.3",
"esbuild": "^0.28.1",
"fake-indexeddb": "^6.2.5",
"qrcode-generator": "^2.0.4",
"wrangler": "^4.96.0"
}
}