LSX gate: FIFA reaches "connecting to EA Servers" via bridge
Implement the LSX (EA App bootstrap, TCP :3216→:3217) server in the bridge
and clear the loading-screen crash gate. FIFA 23 now completes the full LSX
handshake + session against OpenFUT and advances to the online/Blaze phase
("<persona> is connecting to the EA Servers…") — verified live, not a cached
session (the displayed persona "fun" comes from our GetProfile).
Root cause of the invariant loading-screen crash: get_config() omitted the
PROGRESSIVE_INSTALLATION and PROGRESSIVE_INSTALLATION_EVENT services (Name="PI").
FIFA builds its service registry from GetConfig and resolves that handle during
online-init; the missing service left a null handle it dereferenced at
FIFA23.exe+0x133dfc5 (mov rax,[r13+0x18], r13=NULL) ~2s after LSX — identical
across every prior run. Found via FIFA's own CrashReport_*.json (stable RIP) +
diffing anadius64.dll's service-registration table against ours.
Also in this change:
- process_frame(): handle FIFA's pipelined (batched) LSX messages per read,
eliminating the ~15s handshake hang.
- Real anadius values (RE'd from anadius64.dll + anadius.cfg): PersonaId/UserId/
persona, locale list, GetGameInfo fixed `GameInfo="<value>"` attribute,
GetAllGameInfo 14-attr schema, GetSetting `Setting=` attribute.
- IsProgressiveInstallationAvailable served from sender="PI".
- docs/connection-gate-findings.md: full RE trail; relocate stale openfut-hook
copy under docs/ (canonical hook lives in openfut-launcher).
Next gate: Blaze/online (M2), ridden over ProtoSSL in-process.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
funman300
+594
@@ -0,0 +1,594 @@
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/// EA App LSX server (TCP port 3216).
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///
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/// FIFA 23 opens two concurrent connections to this port at startup.
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/// Protocol: server speaks first — sends an XML greeting with a challenge
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/// key; client replies with ChallengeResponse; server replies with
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/// ChallengeAccepted; then an AES-128-ECB encrypted session loop follows.
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use aes::cipher::{generic_array::GenericArray, BlockDecrypt, BlockEncrypt, KeyInit};
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use aes::Aes128;
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use tokio::io::{AsyncReadExt, AsyncWriteExt};
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use tokio::net::{TcpListener, TcpStream};
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use tracing::{debug, info, warn};
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const GREETING_KEY: &str = "cacf897a20b6d612ad0c05e011df52bb";
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const AES_KEY: [u8; 16] = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
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// Account identity + locale that anadius's in-process LSX emu reports (recovered
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// from anadius.cfg — the config the emu reads). FIFA carries these values into
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// its online/loading state, so our bridge must report the SAME ones anadius does;
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// fabricated values crash FIFA before the loading screen. See the LSX-regression
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// section in docs/connection-gate-findings.md.
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const PERSONA_ID: &str = "1144668899";
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const USER_ID: &str = "1000200030000";
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const USERNAME: &str = "fun";
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const INSTALLED_LANGUAGE: &str = "en_US";
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const LANGUAGES: &str =
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"pt_PT,tr_TR,ko_KR,cs_CZ,zh_CN,zh_HK,da_DK,no_NO,sv_SE,en_US,pt_BR,de_DE,\
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es_ES,fr_FR,it_IT,ja_JP,es_MX,nl_NL,pl_PL,ru_RU,ar_SA";
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/// The full game-info attribute set anadius's `GetAllGameInfo` handler emits,
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/// as (GameInfoId key, response attribute name, value). Recovered by
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/// disassembling anadius64.dll's builder (attribute names + order) plus
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/// anadius.cfg (version/language values). Our old `<GetAllGameInfoResponse />`
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/// was empty — FIFA reads these fields during load and crashes without them.
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/// TODO/CONFIRM the exact values for the entitlement/group fields (the names are
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/// certain from the disassembly; a few values are best-effort defaults).
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const GAME_INFO: &[(&str, &str, &str)] = &[
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("DISPLAY_NAME", "DisplayName", "FIFA 23"),
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("INSTALLED_VERSION", "InstalledVersion", "1.0.82.43747"),
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("AVAILABLE_VERSION", "AvailableVersion", "1.0.82.43747"),
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("UPTODATE", "UpToDate", "true"),
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("FULLGAME_IS_RELEASED", "FullGameReleased", "true"),
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("FULLGAME_RELEASE_DATE", "FullGameReleaseDate", "2022-09-30T00:00:00"),
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("FULLGAME_PURCHASED", "FullGamePurchased", "true"),
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("FREETRIAL", "FreeTrial", "false"),
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("EXPIRATION", "Expiration", "0000-00-00T00:00:00"),
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("ENTITLEMENT_SOURCE", "EntitlementSource", "NORMAL"),
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("MAX_GROUP_SIZE", "MaxGroupSize", "0"),
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("LANGUAGES", "Languages", LANGUAGES),
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("INSTALLED_LANGUAGE", "InstalledLanguage", INSTALLED_LANGUAGE),
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];
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pub async fn start_server(addr: &str) -> anyhow::Result<()> {
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let listener = TcpListener::bind(addr).await?;
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info!("LSX server listening on {addr}");
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loop {
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let (stream, peer) = listener.accept().await?;
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debug!("LSX: connection from {peer}");
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tokio::spawn(async move {
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if let Err(e) = handle(stream).await {
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warn!("LSX: connection error: {e}");
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}
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});
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}
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}
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async fn handle(mut stream: TcpStream) -> anyhow::Result<()> {
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// 1. Server speaks first — send greeting
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let greeting = format!(
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"<LSX>\r\n <Event sender=\"EALS\">\r\n <Challenge build=\"release\" key=\"{GREETING_KEY}\" version=\"10,5,30,15625\" />\r\n </Event>\r\n</LSX>\0"
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);
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debug!("LSX: sending greeting");
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stream.write_all(greeting.as_bytes()).await?;
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// 2. Receive ChallengeResponse
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let raw = read_msg(&mut stream).await?;
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let text = String::from_utf8_lossy(&raw);
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debug!("LSX: got ChallengeResponse: {}", &text[..text.len().min(300)]);
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let parts: Vec<&str> = text.split('"').collect();
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let id = parts.get(3).copied().unwrap_or("1");
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let key = parts.get(7).copied().unwrap_or("");
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debug!("LSX: challenge id={id} key={key}");
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let our_response = make_challenge_response(key);
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let seed = compute_seed(&our_response);
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debug!("LSX: response={our_response} seed={seed}");
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// 3. Send ChallengeAccepted
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let accepted = format!(
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"<LSX>\r\n <Response id=\"{id}\" sender=\"EALS\">\r\n <ChallengeAccepted response=\"{our_response}\" />\r\n </Response>\r\n</LSX>\0"
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);
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stream.write_all(accepted.as_bytes()).await?;
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info!("LSX: handshake complete");
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// 4. Session loop
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loop {
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let raw = match read_msg(&mut stream).await {
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Ok(b) => b,
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Err(_) => break,
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};
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// Dump the exact wire bytes so the session seed can be brute-forced
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// offline against this ciphertext (see docs/connection-gate-findings.md).
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debug!("LSX: session raw ({} bytes): {}", raw.len(), bytes_to_hex(&raw));
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let out = process_frame(&raw, seed);
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if out.is_empty() {
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continue;
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}
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if stream.write_all(&out).await.is_err() {
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break;
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}
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}
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debug!("LSX: client disconnected");
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Ok(())
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}
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/// Process one raw socket read, which may contain SEVERAL pipelined LSX messages.
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///
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/// FIFA batches multiple LSX messages into a single TCP segment — each a
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/// null-terminated block of AES-ciphertext-as-ASCII-hex (e.g. `SetPresence`
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/// immediately followed by a `GetGameInfo GameInfoId="LANGUAGES"` query). The
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/// old loop decrypted the whole read as one blob and dispatched only the FIRST
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/// message, silently dropping the rest. A dropped request leaves FIFA waiting on
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/// a response that never arrives; it times out ~15s later and crashes before the
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/// loading screen. So we split on the null terminators and answer EVERY message,
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/// returning the concatenated null-terminated encrypted responses (one per
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/// request), preserving order.
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fn process_frame(raw: &[u8], seed: u16) -> Vec<u8> {
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let mut out = Vec::new();
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for chunk in raw.split(|&b| b == 0) {
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let hex = String::from_utf8_lossy(chunk);
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let hex = hex.trim();
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if hex.is_empty() {
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continue;
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}
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let decrypted = lsx_decrypt(hex, seed);
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let trimmed = decrypted.trim();
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if trimmed.is_empty() {
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continue;
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}
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debug!("LSX: request: {}", &trimmed[..trimmed.len().min(300)]);
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let response_xml = dispatch(trimmed);
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debug!("LSX: response: {}", &response_xml[..response_xml.len().min(300)]);
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let encrypted = lsx_encrypt(&response_xml, seed);
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out.extend_from_slice(encrypted.as_bytes());
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out.push(0);
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}
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out
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}
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/// Read a null-terminated or fixed-size LSX message.
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async fn read_msg(stream: &mut TcpStream) -> anyhow::Result<Vec<u8>> {
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let mut buf = vec![0u8; 65536];
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let n = stream.read(&mut buf).await?;
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if n == 0 { return Err(anyhow::anyhow!("connection closed")); }
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buf.truncate(n);
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Ok(buf)
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}
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// ─── dispatcher ──────────────────────────────────────────────────────────────
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fn dispatch(xml: &str) -> String {
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let parts: Vec<&str> = xml.split('"').collect();
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let id = parts.get(3).copied().unwrap_or("1");
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let req_type = parts.get(4).copied().unwrap_or("");
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debug!("LSX: dispatch id={id} type={req_type}");
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match req_type {
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"><GetConfig version=" => get_config(id),
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"><GetAuthCode ClientId=" | "><GetAuthCode UserId=" => get_auth_code(id),
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"><GetInternetConnectedState version=" => get_internet_state(id),
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"><GetProfile index=" => get_profile(id),
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"><GetSetting SettingId=" => {
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let setting = parts.get(5).copied().unwrap_or("");
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get_setting(id, setting)
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}
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"><QueryEntitlements UserId=" => query_entitlements(id),
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"><RequestLicense UserId=" => request_license(id),
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"><QueryContent UserId=" => query_content(id),
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"><GetBlockList version=" => get_block_list(id),
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"><QueryFriends UserId=" => query_friends(id),
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"><QueryPresence UserId=" => query_presence(id),
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"><SetPresence UserId=" => set_presence(id),
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"><GetPresenceVisibility UserId=" => get_presence_visibility(id),
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"><GetWalletBalance UserId=" => get_wallet_balance(id),
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"><GetGameInfo GameInfoId=" => {
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let game_info_id = parts.get(5).copied().unwrap_or("");
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get_game_info(id, game_info_id)
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}
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"><GetAllGameInfo version=" => get_all_game_info(id),
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"><IsProgressiveInstallationAvailable ItemId=" => is_progressive_installation_available(id),
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_ => {
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warn!("LSX: unknown request type: {req_type}");
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format!("<LSX><Response id=\"{id}\" sender=\"EbisuSDK\"><Ok /></Response></LSX>")
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}
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}
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}
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fn get_config(id: &str) -> String {
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format!(r#"<LSX>
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<Response id="{id}" sender="EbisuSDK">
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<GetConfigResponse>
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<Service Facility="SDK" Name="EbisuSDK" />
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<Service Facility="PROFILE" Name="EbisuSDK" />
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<Service Facility="PRESENCE" Name="XMPP" />
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<Service Facility="FRIENDS" Name="XMPP" />
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<Service Facility="COMMERCE" Name="Commerce" />
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<Service Facility="LOGIN" Name="EALS" />
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<Service Facility="UTILITY" Name="Utility" />
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<Service Facility="XMPP" Name="XMPP" />
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<Service Facility="CHAT" Name="XMPP" />
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<Service Facility="IGO" Name="EbisuSDK" />
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<Service Facility="MISC" Name="EbisuSDK" />
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<Service Facility="IGO_EVENT" Name="EbisuSDK" />
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<Service Facility="EALS_EVENTS" Name="EALS" />
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<Service Facility="LOGIN_EVENT" Name="EbisuSDK" />
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<Service Facility="INVITE_EVENT" Name="XMPP" />
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<Service Facility="PROFILE_EVENT" Name="EbisuSDK" />
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<Service Facility="PRESENCE_EVENT" Name="XMPP" />
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<Service Facility="FRIENDS_EVENT" Name="XMPP" />
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<Service Facility="COMMERCE_EVENT" Name="Commerce" />
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<Service Facility="CHAT_EVENT" Name="XMPP" />
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<Service Facility="DOWNLOAD_EVENT" Name="EbisuSDK" />
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<Service Facility="PERMISSION" Name="EbisuSDK" />
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<Service Facility="RESOURCES" Name="EbisuSDK" />
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<Service Facility="BLOCKED_USERS" Name="EbisuSDK" />
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<Service Facility="BLOCKED_USER_EVENT" Name="EbisuSDK" />
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<Service Facility="GET_USERID" Name="EbisuSDK" />
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<Service Facility="ONLINE_STATUS_EVENT" Name="EbisuSDK" />
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<Service Facility="ACHIEVEMENT" Name="EbisuSDK" />
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<Service Facility="ACHIEVEMENT_EVENT" Name="EbisuSDK" />
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<Service Facility="BROADCAST_EVENT" Name="EbisuSDK" />
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<Service Facility="RECENTPLAYER" Name="EbisuSDK" />
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<Service Facility="PROGRESSIVE_INSTALLATION" Name="PI" />
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<Service Facility="PROGRESSIVE_INSTALLATION_EVENT" Name="PI" />
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<Service Facility="CONTENT" Name="EbisuSDK" />
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</GetConfigResponse>
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</Response>
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</LSX>"#)
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}
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fn get_auth_code(id: &str) -> String {
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format!(r#"<LSX>
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<Response id="{id}" sender="Utility">
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<AuthCode value="OpenFUT_fake_auth_code_v1" />
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</Response>
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</LSX>"#)
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}
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fn get_internet_state(id: &str) -> String {
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format!(r#"<LSX>
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<Response id="{id}" sender="Utility">
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<InternetConnectedState connected="1" />
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</Response>
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</LSX>"#)
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}
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fn get_profile(id: &str) -> String {
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format!(r#"<LSX>
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<Response id="{id}" sender="EbisuSDK">
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<GetProfileResponse PersonaId="{PERSONA_ID}" Persona="{USERNAME}" Country="US" GeoCountry="US"
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UserIndex="0" IsTrialSubscriber="false" AvatarId="1"
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IsUnderAge="false" IsSubscriber="false" IsSteamSubscriber="false" SubscriberLevel="2"
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CommerceCurrency="USD" UserId="{USER_ID}" CommerceCountry="US" />
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</Response>
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</LSX>"#)
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}
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fn get_setting(id: &str, setting: &str) -> String {
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let value = match setting { "ENVIRONMENT" => "production", _ => "false" };
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format!(r#"<LSX>
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<Response id="{id}" sender="EbisuSDK">
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<GetSettingResponse Setting="{value}" />
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</Response>
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</LSX>"#)
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}
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fn query_entitlements(id: &str) -> String {
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format!(r#"<LSX>
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<Response id="{id}" sender="Commerce">
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<QueryEntitlementsResponse>
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<Entitlements ItemId="Origin.OFR.50.0004658" Type="ONLINE_ACCESS"
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EntitlementId="1021747550001" EntitlementTag="ONLINE_ACCESS"
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Group="FIFA23PC" ResourceId="" UseCount="0"
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Expiration="0000-00-00T00:00:00" GrantDate="2022-09-30T00:00:00"
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LastModifiedDate="2022-09-30T00:00:00" Version="0" />
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<Entitlements ItemId="Origin.OFR.50.0004658" Type="DEFAULT"
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EntitlementId="1021747550002" EntitlementTag="ONLINE_ACCESS"
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Group="FIFA23PC" ResourceId="" UseCount="0"
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Expiration="0000-00-00T00:00:00" GrantDate="2022-09-30T00:00:00"
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LastModifiedDate="2022-09-30T00:00:00" Version="0" />
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</QueryEntitlementsResponse>
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</Response>
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</LSX>"#)
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}
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fn request_license(id: &str) -> String {
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format!(r#"<LSX>
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<Response sender="EbisuSDK" id="{id}">
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<RequestLicenseResponse License="OpenFUT_fake_license_v1" />
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</Response>
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</LSX>"#)
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}
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fn query_content(id: &str) -> String {
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format!(r#"<LSX>
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<Response id="{id}" sender="EbisuSDK">
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<QueryContentResponse>
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<Content Gamestate="READY_TO_PLAY" progressValue="0"
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contentID="Origin.OFR.50.0004658"
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installedVersion="1.0.0.0" availableVersion="1.0.0.0"
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displayName="FIFA 23" />
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</QueryContentResponse>
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</Response>
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</LSX>"#)
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}
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fn get_block_list(id: &str) -> String {
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format!(r#"<LSX><Response id="{id}" sender="EbisuSDK"><GetBlockListResponse /></Response></LSX>"#)
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}
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fn query_friends(id: &str) -> String {
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format!(r#"<LSX><Response id="{id}" sender="XMPP"><QueryFriendsResponse /></Response></LSX>"#)
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}
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fn query_presence(id: &str) -> String {
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format!(r#"<LSX><Response id="{id}" sender="XMPP"><QueryPresenceResponse UserId="{USER_ID}" PersonaId="{PERSONA_ID}" /></Response></LSX>"#)
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}
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fn set_presence(id: &str) -> String {
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format!(r#"<LSX><Response id="{id}" sender="XMPP"><SetPresenceResponse /></Response></LSX>"#)
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}
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fn get_presence_visibility(id: &str) -> String {
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format!(r#"<LSX><Response id="{id}" sender="EbisuSDK"><GetPresenceVisibilityResponse Visibility="FRIENDS" /></Response></LSX>"#)
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}
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fn get_wallet_balance(id: &str) -> String {
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format!(r#"<LSX><Response id="{id}" sender="Commerce"><GetWalletBalanceResponse Balance="0" Currency="USD" /></Response></LSX>"#)
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}
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fn get_all_game_info(id: &str) -> String {
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// Populated with the full attribute set anadius emits (see GAME_INFO), plus
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// the literal `HasExpiration="false"` the disassembly showed. Empty responses
|
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// crash FIFA during load.
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let mut attrs = String::new();
|
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for (_key, attr, value) in GAME_INFO {
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attrs.push_str(&format!(r#"{attr}="{value}" "#));
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||||
}
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format!(
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||||
r#"<LSX><Response id="{id}" sender="EbisuSDK"><GetAllGameInfoResponse {attrs}HasExpiration="false" /></Response></LSX>"#
|
||||
)
|
||||
}
|
||||
|
||||
/// GetGameInfo — FIFA queries per-key EbisuSDK "game info" values during the LSX
|
||||
/// session (observed keys: `FREETRIAL`, `LANGUAGES`, `INSTALLED_LANGUAGE`).
|
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///
|
||||
/// The response element is `GetGameInfoResponse` with a **single fixed attribute
|
||||
/// literally named `GameInfo`** holding the requested value — NOT a per-key
|
||||
/// attribute (`InstalledLanguage`, `Languages`, …) and NOT a generic `Value`.
|
||||
/// Recovered by disassembling the response builder in `anadius64.dll`: it writes
|
||||
/// `<` + `GetGameInfoResponse` + ` ` + `GameInfo` + `="` + <value> + `"` + ` />`,
|
||||
/// with `GameInfo` a fixed 8-byte string constant regardless of the GameInfoId.
|
||||
/// The value is looked up per key (from `anadius.cfg`); the attribute name never
|
||||
/// changes.
|
||||
///
|
||||
/// This was the loading-screen crash: we were sending an attribute FIFA never
|
||||
/// reads (first `Value=`, then a per-key name), so it always saw a null
|
||||
/// installed-language, re-queried `INSTALLED_LANGUAGE` three times, and crashed.
|
||||
/// That also explains why changing the value string (empty → `en_US`) had zero
|
||||
/// effect — FIFA wasn't reading our attribute at all.
|
||||
fn get_game_info(id: &str, game_info_id: &str) -> String {
|
||||
// Strip surrounding quotes the positional parser can leave on the value.
|
||||
let key = game_info_id.trim_matches('"');
|
||||
debug!("LSX: GetGameInfo GameInfoId={key}");
|
||||
// The value is per-key; the attribute name is always the literal `GameInfo`.
|
||||
let value = GAME_INFO
|
||||
.iter()
|
||||
.find(|(k, _, _)| *k == key)
|
||||
.map(|(_, _, v)| *v)
|
||||
.unwrap_or("");
|
||||
format!(
|
||||
r#"<LSX><Response id="{id}" sender="EbisuSDK"><GetGameInfoResponse GameInfo="{value}" /></Response></LSX>"#
|
||||
)
|
||||
}
|
||||
|
||||
/// IsProgressiveInstallationAvailable — FIFA asks this early in the LSX session.
|
||||
/// anadius emits `IsProgressiveInstallationAvailableResponse` with an `Available`
|
||||
/// attribute (recovered from `anadius64.dll`); we previously fell through to the
|
||||
/// generic `<Ok/>`. The game is fully installed, so progressive/streaming install
|
||||
/// is not available.
|
||||
///
|
||||
/// The handling service is `PROGRESSIVE_INSTALLATION`, whose Name in anadius's
|
||||
/// service registry is `PI` (see `get_config`), so the response is sent from
|
||||
/// `sender="PI"`. This service MUST also be declared in the `GetConfig` response:
|
||||
/// FIFA builds its service registry from GetConfig and resolves the
|
||||
/// `PROGRESSIVE_INSTALLATION` handle from it. Omitting the service left FIFA with a
|
||||
/// null handle it dereferenced during online-init, crashing at FIFA23.exe+0x133dfc5
|
||||
/// (`mov rax,[r13+0x18]`, r13=NULL) ~2s after LSX — the invariant loading-screen
|
||||
/// crash across every prior run.
|
||||
fn is_progressive_installation_available(id: &str) -> String {
|
||||
format!(
|
||||
r#"<LSX><Response id="{id}" sender="PI"><IsProgressiveInstallationAvailableResponse Available="false" /></Response></LSX>"#
|
||||
)
|
||||
}
|
||||
|
||||
// ─── crypto ──────────────────────────────────────────────────────────────────
|
||||
|
||||
/// AES-128-ECB encrypt with PKCS#7 padding, backed by the `aes` crate.
|
||||
/// ECB has no per-message state, so we drive the block cipher over each
|
||||
/// 16-byte chunk ourselves.
|
||||
fn aes_ecb_pkcs7_encrypt(key: &[u8; 16], plaintext: &[u8]) -> Vec<u8> {
|
||||
let cipher = Aes128::new(GenericArray::from_slice(key));
|
||||
let pad = 16 - (plaintext.len() % 16);
|
||||
let mut padded = plaintext.to_vec();
|
||||
padded.resize(plaintext.len() + pad, pad as u8);
|
||||
for chunk in padded.chunks_mut(16) {
|
||||
cipher.encrypt_block(GenericArray::from_mut_slice(chunk));
|
||||
}
|
||||
padded
|
||||
}
|
||||
|
||||
/// AES-128-ECB decrypt of whole blocks, then a *lenient* PKCS#7 strip.
|
||||
/// Kept lenient (won't error on invalid padding) on purpose: a wrong session
|
||||
/// key yields garbage we want to log and move past, not panic on. This is why
|
||||
/// we don't use the crate's strict `Pkcs7` unpadder.
|
||||
fn aes_ecb_decrypt_nopad(key: &[u8; 16], data: &[u8]) -> Vec<u8> {
|
||||
let cipher = Aes128::new(GenericArray::from_slice(key));
|
||||
let mut out = Vec::with_capacity(data.len());
|
||||
for chunk in data.chunks(16) {
|
||||
if chunk.len() < 16 { break; }
|
||||
let mut block = *GenericArray::from_slice(chunk);
|
||||
cipher.decrypt_block(&mut block);
|
||||
out.extend_from_slice(&block);
|
||||
}
|
||||
if let Some(&pad) = out.last() {
|
||||
let pad = pad as usize;
|
||||
if pad <= 16 && out.len() >= pad { out.truncate(out.len() - pad); }
|
||||
}
|
||||
out
|
||||
}
|
||||
|
||||
struct CRandom { seed: u32 }
|
||||
impl CRandom {
|
||||
fn new() -> Self { Self { seed: 0 } }
|
||||
fn seed_with(&mut self, s: u32) { self.seed = s; }
|
||||
fn rand(&mut self) -> u32 { self.seed=self.seed.wrapping_mul(214013).wrapping_add(2531011); (self.seed>>16)&0xFFFF }
|
||||
}
|
||||
|
||||
fn get_lsx_key(seed: u16) -> [u8; 16] {
|
||||
let mut rng=CRandom::new();
|
||||
rng.seed_with(7);
|
||||
let next=rng.rand();
|
||||
rng.seed_with(next.wrapping_add(seed as u32));
|
||||
let mut k=[0u8;16]; for b in &mut k { *b=rng.rand() as u8; }
|
||||
k
|
||||
}
|
||||
|
||||
fn hex_to_bytes(s: &str) -> Vec<u8> {
|
||||
let s: String=s.chars().filter(|c|c.is_ascii_hexdigit()).collect();
|
||||
if s.len()%2!=0 { return Vec::new(); }
|
||||
(0..s.len()/2).filter_map(|i|u8::from_str_radix(&s[2*i..2*i+2],16).ok()).collect()
|
||||
}
|
||||
fn bytes_to_hex(b: &[u8]) -> String { b.iter().map(|x|format!("{x:02x}")).collect() }
|
||||
|
||||
fn compute_seed(hex: &str) -> u16 {
|
||||
// The session seed is the first TWO ASCII characters of the ChallengeAccepted
|
||||
// response hex string, taken as their raw byte values — NOT the leading hex
|
||||
// pair parsed into a byte. Confirmed 2026-07-02 by brute-forcing the seed
|
||||
// against a captured FIFA session message (see docs/connection-gate-findings.md):
|
||||
// response "0f73…" → seed 0x3066 ('0','f'), not 0x0F73.
|
||||
let b = hex.as_bytes();
|
||||
let b0 = b.first().copied().unwrap_or(0);
|
||||
let b1 = b.get(1).copied().unwrap_or(0);
|
||||
((b0 as u16) << 8) | (b1 as u16)
|
||||
}
|
||||
|
||||
fn make_challenge_response(key: &str) -> String {
|
||||
bytes_to_hex(&aes_ecb_pkcs7_encrypt(&AES_KEY, key.as_bytes()))
|
||||
}
|
||||
|
||||
fn lsx_decrypt(hex_data: &str, seed: u16) -> String {
|
||||
let key=get_lsx_key(seed);
|
||||
let ct=hex_to_bytes(hex_data);
|
||||
if ct.is_empty() { return String::new(); }
|
||||
String::from_utf8_lossy(&aes_ecb_decrypt_nopad(&key, &ct)).trim_matches('\0').to_string()
|
||||
}
|
||||
|
||||
fn lsx_encrypt(text: &str, seed: u16) -> String {
|
||||
let key=get_lsx_key(seed);
|
||||
bytes_to_hex(&aes_ecb_pkcs7_encrypt(&key, text.as_bytes()))
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
/// FIPS-197 known-answer vector. The placeholder `AES_KEY` (00 01 .. 0f) is
|
||||
/// exactly the FIPS-197 example key, so encrypting the FIPS example block
|
||||
/// must yield the published ciphertext. This proves the `aes`-crate swap is
|
||||
/// standard, interop-compatible AES-128 — not merely self-consistent.
|
||||
#[test]
|
||||
fn aes128_matches_fips197_and_round_trips() {
|
||||
// FIPS-197 §C.1: plaintext 00112233445566778899aabbccddeeff
|
||||
let plaintext = [
|
||||
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
|
||||
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
|
||||
];
|
||||
// ...under key 000102..0f gives ciphertext 69c4e0d86a7b0430d8cdb78070b4c55a
|
||||
let expected_ct = [
|
||||
0x69, 0xc4, 0xe0, 0xd8, 0x6a, 0x7b, 0x04, 0x30,
|
||||
0xd8, 0xcd, 0xb7, 0x80, 0x70, 0xb4, 0xc5, 0x5a,
|
||||
];
|
||||
|
||||
// aes_ecb_pkcs7_encrypt pads a full extra block, so only assert block 0.
|
||||
let out = aes_ecb_pkcs7_encrypt(&AES_KEY, &plaintext);
|
||||
assert_eq!(&out[..16], &expected_ct, "AES-128-ECB block 0 must match FIPS-197");
|
||||
|
||||
// Encrypt→decrypt round-trips back to the exact plaintext (padding stripped).
|
||||
let round_tripped = aes_ecb_decrypt_nopad(&AES_KEY, &out);
|
||||
assert_eq!(round_tripped, plaintext, "decrypt must invert encrypt");
|
||||
}
|
||||
|
||||
/// The load-bearing regression test: when FIFA pipelines two LSX messages into
|
||||
/// one frame (as it does with SetPresence + a GetGameInfo LANGUAGES query),
|
||||
/// BOTH must be answered. Dropping the second hangs FIFA into a ~15s timeout
|
||||
/// and a crash before the loading screen (the 2026-07-02 root cause).
|
||||
#[test]
|
||||
fn process_frame_answers_every_pipelined_message() {
|
||||
let seed: u16 = 0x3066;
|
||||
let m1 = lsx_encrypt(
|
||||
r#"<LSX><Request recipient="XMPP" id="1"><SetPresence UserId="1" Presence="INGAME" version="3"/></Request></LSX>"#,
|
||||
seed,
|
||||
);
|
||||
let m2 = lsx_encrypt(
|
||||
r#"<LSX><Request recipient="EbisuSDK" id="2"><GetGameInfo GameInfoId="LANGUAGES" version="3"/></Request></LSX>"#,
|
||||
seed,
|
||||
);
|
||||
// Two null-terminated ciphertext messages in a single read, as FIFA sends.
|
||||
let mut raw = Vec::new();
|
||||
raw.extend_from_slice(m1.as_bytes());
|
||||
raw.push(0);
|
||||
raw.extend_from_slice(m2.as_bytes());
|
||||
raw.push(0);
|
||||
|
||||
let out = process_frame(&raw, seed);
|
||||
let responses: Vec<&[u8]> = out.split(|&b| b == 0).filter(|c| !c.is_empty()).collect();
|
||||
assert_eq!(responses.len(), 2, "both pipelined requests must be answered");
|
||||
|
||||
let r1 = lsx_decrypt(&String::from_utf8_lossy(responses[0]), seed);
|
||||
let r2 = lsx_decrypt(&String::from_utf8_lossy(responses[1]), seed);
|
||||
assert!(r1.contains(r#"id="1""#), "first response is for request id 1, got: {r1}");
|
||||
assert!(r2.contains(r#"id="2""#), "second response is for request id 2, got: {r2}");
|
||||
assert!(r2.contains("GetGameInfoResponse"), "the piggybacked LANGUAGES query must be answered, got: {r2}");
|
||||
}
|
||||
|
||||
/// Pins the `split('"')` index parsing that routes GetGameInfo, so the fragile
|
||||
/// positional extraction doesn't silently regress to the generic `<Ok/>` path.
|
||||
/// GetConfig must declare the PROGRESSIVE_INSTALLATION service (Name="PI"),
|
||||
/// recovered from anadius's service-registration table in anadius64.dll. FIFA
|
||||
/// builds its service registry from GetConfig and resolves this handle during
|
||||
/// online-init; omitting it left a null handle that crashed FIFA at
|
||||
/// FIFA23.exe+0x133dfc5 ~2s after LSX in every run (2026-07-02).
|
||||
#[test]
|
||||
fn get_config_declares_progressive_installation_service() {
|
||||
let resp = dispatch(r#"<LSX><Request recipient="EbisuSDK" id="1"><GetConfig version="3"/></Request></LSX>"#);
|
||||
assert!(
|
||||
resp.contains(r#"Facility="PROGRESSIVE_INSTALLATION" Name="PI""#),
|
||||
"GetConfig must declare PROGRESSIVE_INSTALLATION→PI, got: {resp}"
|
||||
);
|
||||
assert!(
|
||||
resp.contains(r#"Facility="PROGRESSIVE_INSTALLATION_EVENT" Name="PI""#),
|
||||
"GetConfig must declare PROGRESSIVE_INSTALLATION_EVENT→PI, got: {resp}"
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn dispatch_routes_get_game_info() {
|
||||
let req = r#"<LSX><Request recipient="EbisuSDK" id="42"><GetGameInfo GameInfoId="FREETRIAL" /></Request></LSX>"#;
|
||||
let resp = dispatch(req);
|
||||
assert!(resp.contains("<GetGameInfoResponse"), "should hit the GetGameInfo handler, got: {resp}");
|
||||
assert!(resp.contains(r#"id="42""#), "should echo the request id, got: {resp}");
|
||||
}
|
||||
|
||||
/// GetGameInfo must use anadius's fixed `GameInfo="<value>"` attribute (RE'd
|
||||
/// from the response builder in anadius64.dll), NOT a per-key attribute name
|
||||
/// and NOT a generic `Value` — FIFA reads the value out of the `GameInfo`
|
||||
/// attribute, and the wrong attribute name crashed it before the loading
|
||||
/// screen (2026-07-02).
|
||||
#[test]
|
||||
fn dispatch_get_game_info_uses_fixed_gameinfo_attribute() {
|
||||
let installed = dispatch(r#"<LSX><Request recipient="EbisuSDK" id="7"><GetGameInfo GameInfoId="INSTALLED_LANGUAGE" version="3"/></Request></LSX>"#);
|
||||
assert!(installed.contains(r#"GameInfo="en_US""#), "got: {installed}");
|
||||
|
||||
let languages = dispatch(r#"<LSX><Request recipient="EbisuSDK" id="8"><GetGameInfo GameInfoId="LANGUAGES" version="3"/></Request></LSX>"#);
|
||||
assert!(languages.contains(r#"GameInfo=""#), "LANGUAGES must use the fixed GameInfo attribute, got: {languages}");
|
||||
assert!(languages.contains("en_US") && languages.contains("fr_FR"), "LANGUAGES must be the full locale list, got: {languages}");
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user