catarrh
d21997764f
Adds optional decryption of ciphered secured packets, entirely in the browser — the key never leaves the frontend. - decode.py: _decode_secured_packet exposes 'cipher_block' (the contiguous on-wire ciphered octets CNTR..end, ready for CBC) and raw kic/kid bytes for algorithm selection. Additive only. - index.html: pure-JS DES/3DES core (FIPS 46-3 bit-array tables, parity ignored) + CBC; AES-CBC via native SubtleCrypto; both with zero IV per TS 102 225. decryptSecured() picks the algorithm from the KIc nibble (02 AES-CBC, 05 3DES-2K, 09 3DES-3K, 01 DES) with key-length validation. - UI: ciphered packets show a key-hex input + Decrypt strip below the detail table; keys are memoized per key-set for the session in an in-memory OTA_KEYS map — never sent to the server, never persisted. - Decrypted results cached by cipher_block (survive live-polling re-renders); plaintext rows rendered as CNTR/PCNTR/RC/Secured data (decrypted) alongside the ciphertext; wrong-key guard via the decrypted padding counter (PCNTR > remaining → "invalid padding"). - 3DES implementation validated byte-identical against openssl des-ede3-cbc (3-key, 2-key ×3 random vectors, single-key). No CC verification (out of scope). Tests: +2 (cipher_block contiguity, AES registry guard) — 350 total. Version 1.19.0, SW cache simtrace-analyser-v27.
49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
const CACHE = 'simtrace-analyser-v27';
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const PRECACHE = [
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'index.html',
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'manifest.json',
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'icon-192.png',
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'icon-512.png',
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'favicon.png',
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'sim-analyser.svg',
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'sim-analyser-light.svg',
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];
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self.addEventListener('install', e => {
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self.skipWaiting();
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e.waitUntil(
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caches.open(CACHE)
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.then(cache => cache.addAll(PRECACHE))
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.then(() => console.log('SW: precache done'))
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.catch(err => console.error('SW: precache failed', err))
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);
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});
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self.addEventListener('activate', e => {
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e.waitUntil(
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caches.keys()
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.then(keys => Promise.all(
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keys.filter(k => k !== CACHE).map(k => caches.delete(k))
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))
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.then(() => self.clients.claim())
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.then(() => console.log('SW: activated, controlling clients'))
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);
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});
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self.addEventListener('fetch', e => {
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// Network-first: the local server is always up, so always serve fresh
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// content and fall back to cache only when offline.
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if (!e.request.url.startsWith('http')) return;
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if (e.request.method !== 'GET') return;
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e.respondWith(
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fetch(e.request)
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.then(r => {
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const clone = r.clone();
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caches.open(CACHE).then(c => c.put(e.request, clone)).catch(() => {});
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return r;
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})
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.catch(() => caches.match(e.request))
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);
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});
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