Preserve broker audit causation in central ingestion and SIEM exports

tests/request-audit.test.mjs

@@ -26,3 +26,18 @@ test('SIEM suppresses historical upload hashes while preserving transfer amounts
  const current={...legacy,metadata:{request:{bytes:18,detectedType:'text'}}};assert.deepEqual(toECS(current).safetynet.request,{bytes:18,detected_type:'text'});assert.match(toCEF(current),/cn3=18/);assert.equal(JSON.stringify(toECS(current)).includes(hash),false);
  legacy.kind='download.scan';assert.equal(toECS(legacy).file.hash.sha256,hash);
 });
+
+test('central API accepts typed broker causation and rejects invalid lifecycle semantics',async t=>{
+ const dir=mkdtempSync(join(tmpdir(),'safetynet-request-audit-')),store=openStore(dir),credential='synthetic-device-broker-token';
+ store.db.prepare('INSERT INTO devices(id,name,token_hash) VALUES(?,?,?)').run('broker-device','Synthetic',digest(credential));
+ const server=createApp(store,{publicUrl:'http://127.0.0.1',adminToken:'synthetic-administrator-token-123456789',secure:false}).listen(0,'127.0.0.1');await new Promise(r=>server.once('listening',r));
+ t.after(async()=>{server.closeAllConnections();await new Promise(r=>server.close(r));store.db.close();rmSync(dir,{recursive:true,force:true});});
+ const send=body=>fetch(`http://127.0.0.1:${server.address().port}/api/device/events`,{method:'POST',headers:{authorization:`Bearer ${credential}`,'content-type':'application/json'},body:JSON.stringify(body)});
+ const requestId=randomUUID(),authorizedEventId=randomUUID();
+ const allow={eventId:authorizedEventId,policyVersion:1,kind:'upload.authorized',ruleId:'broker-approved',request:{bytes:7,detectedType:'text'},broker:{requestId,phase:'request.authorized',reason:'broker-approved'}};
+ assert.equal((await send(allow)).status,200);
+ const fault={...allow,eventId:randomUUID(),kind:'upload.block',ruleId:'broker-upstream-failed',broker:{requestId,phase:'forward.fault',reason:'broker-upstream-failed',authorizedEventId}};
+ assert.equal((await send(fault)).status,200);
+ for(const broker of [{...fault.broker,authorizedEventId:undefined},{...fault.broker,authorizedEventId:fault.eventId},{...allow.broker,phase:'connect.block'},{...allow.broker,reason:'arbitrary secret details'},{...allow.broker,body:'private'}])assert.equal((await send({...fault,eventId:broker.authorizedEventId===fault.eventId?fault.eventId:randomUUID(),broker})).status,400);
+ const rows=store.db.prepare('SELECT metadata FROM events ORDER BY id').all();assert.equal(rows.length,2);assert.deepEqual(JSON.parse(rows[1].metadata).broker,fault.broker);assert.equal(store.auditIntegrity.verify().valid,true);
+});