Files
simtrace-analyser/frontend/sw.js
T
catarrh 840e233baf Flag ciphered SCP80 fields: on-wire CNTR/PCNTR/RC are ciphertext
User-reported: the decoded CNTR (0x1830A44E41 ≈ 104 billion) cannot
be the real counter — the OTA platform shows ~200 for that card.

Root cause: per TS 102 225 Table 2 note 1, when SPI indicates
ciphering the whole block from CNTR through the secured data
(CNTR, PCNTR, RC/CC/DS, secured data) is ENCRYPTED. Only CPI, CPL,
CHI/CHL, SPI, KIc, KID and TAR travel in the clear. Our decoder
parsed the ciphertext bytes as if they were the real CNTR/PCNTR/RC
and presented them as such — misleading (the true values are only
recoverable after 3DES decryption with the card's keys).

Fix:
- _decode_secured_packet: emit 'ciphered': True when SPI1.b3 is set
  (wire hex values kept for reference); docstring documents the
  ciphered block.
- _decode_response_packet: accepts ciphered (command SPI2.b5, PoR
  ciphering) and flags the response likewise; database context now
  carries por_ciphered from the ENVELOPE so the GET RESPONSE PoR
  inherits it. Standalone SMS-SUBMIT PoRs carry no SPI — state
  unknowable, defaults to False (documented).
- Frontend: CNTR/PCNTR/RC-CC-DS labels get "(encrypted)" when the
  respective packet is ciphered (command, response, and ENVELOPE
  response renderings).

Tests: +4 TestSecuredCiphering (ciphered flagged, unciphered plain
CNTR e.g. 200, response flag, PoR-via-context). 348 total. Version
1.18.0, SW cache simtrace-analyser-v26.
2026-08-24 19:51:40 +03:00

49 lines
1.4 KiB
JavaScript

const CACHE = 'simtrace-analyser-v26';
const PRECACHE = [
'index.html',
'manifest.json',
'icon-192.png',
'icon-512.png',
'favicon.png',
'sim-analyser.svg',
'sim-analyser-light.svg',
];
self.addEventListener('install', e => {
self.skipWaiting();
e.waitUntil(
caches.open(CACHE)
.then(cache => cache.addAll(PRECACHE))
.then(() => console.log('SW: precache done'))
.catch(err => console.error('SW: precache failed', err))
);
});
self.addEventListener('activate', e => {
e.waitUntil(
caches.keys()
.then(keys => Promise.all(
keys.filter(k => k !== CACHE).map(k => caches.delete(k))
))
.then(() => self.clients.claim())
.then(() => console.log('SW: activated, controlling clients'))
);
});
self.addEventListener('fetch', e => {
// Network-first: the local server is always up, so always serve fresh
// content and fall back to cache only when offline.
if (!e.request.url.startsWith('http')) return;
if (e.request.method !== 'GET') return;
e.respondWith(
fetch(e.request)
.then(r => {
const clone = r.clone();
caches.open(CACHE).then(c => c.put(e.request, clone)).catch(() => {});
return r;
})
.catch(() => caches.match(e.request))
);
});