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琚帶绔?- 淇 MTU 闂锛氬す MSS + 璺緞 MTU 鎺㈡祴锛堝叕缃戝彲鐢ㄧ巼 48% -> 100%锛?- 澶嶇敤 HTTP 杩炴帴锛堝厤鎺夋瘡娆℃柊寤?TLS 鐨?30% 鎻℃墜澶辫触锛?- 姣忓垎閽熷洖澶存壘灞€鍩熺綉锛岃嚜鍔ㄥ垏鍥炲揩 400 鍊嶇殑璺緞 - 鐢婚潰蹇冭烦甯э細闈欐鏃剁渷娴侀噺锛屽鎴风浠嶇煡閬撴祦鏄椿鐨?- 閿佸睆鏃剁粰鍑哄彲鎿嶄綔鐨勬彁绀? 鎵嬭〃绔?- 鍐呯疆 GTS Root R4 / GlobalSign Root CA锛屼慨 SSLHandshakeException - 杩炴帴閿欒缈昏瘧鎴愪汉璇濓紙璇佷功/鏃堕棿/瑙ｆ瀽/瓒呮椂鍒嗗埆鎻愮ず锛?- 缁忎腑杞繛涓婂悗鐢ㄦ湇鍔″櫒鎶ョ殑鍦板潃鍒锋柊宸查厤瀵硅褰?- 鏂板灞€鍩熺綉杩炴帴椤甸潰銆佹湇鍔″櫒寤惰繜妫€娴? 鏈嶅姟鍣ㄧ - 鏀寔 chunked 璇锋眰浣擄紙淇瘡 16 绉掍竴娆＄殑杩炴帴閿欎贡涓庡ぇ闈㈢Н 502锛?- 缃戠粶璋冧紭鑴氭湰 net-tune.sh锛堝紑鏈鸿嚜鍔ㄥ簲鐢級 - 绠＄悊椤碉細鎵归噺鍒犻櫎銆佺綉缁滀綋妫€銆佷笅杞藉尯 - 闅ч亾鏀?HTTP/2 + 鍙岃繛鎺? 鏂囨。 - 璁稿彲鍗忚 / 瀹夎鍓嶅繀璇?/ 瀹夎鍚庨』鐭ワ紙浣滆€咃細灏忛害瀛愶級
307 lines
12 KiB
Python
307 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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"""生成 TlsCompat.java —— 修手表端 "SSLHandshakeException: Chain validation failed"。
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问题：
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手表连中转报 Chain validation failed。
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证书链是：xxmxxs.top <- GTS WE1 <- GTS Root R4 <- GlobalSign Root CA
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廉价手表的根证书库常常缺 GTS Root R4（2021 年才加进 AOSP），
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于是找不到信任锚 -> 握手直接失败。
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修法：
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把这两个根证书**内嵌进 APK**，校验时"系统库 或 内置库"任一通过即可。
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这两个都是公开的合法根证书，不是"跳过校验" ——
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安全性仍然完整：证书必须由可信 CA 签发、且域名匹配。
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只是把可信 CA 集合从"手表自带的那一份"扩大到"手表自带的 + 这两个"。
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另外把错误信息翻译成人话：
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* 如果报的是时间相关（not yet valid / expired）-> 提示手表时间不对
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* 如果还是校验失败 -> 提示可能被中间人劫持
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顺带还把 "HTTP 错误码" 和 "网络不通" 区分开，便于用户自查。
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"""
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from __future__ import annotations
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import sys
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from pathlib import Path
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ROOT = Path(r"C:\Users\shu\Desktop\deepseekagent\LanRemote")
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CERTS = ROOT / "android" / "certs"
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OUT = (ROOT / "android" / "src" / "com" / "lanremote" / "watch"
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/ "TlsCompat.java")
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def pem_to_java(text: str) -> str:
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"""把 PEM 变成 Java 字符串拼接（每行一个常量，避免超长行）。"""
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lines = [line.strip() for line in text.strip().splitlines()
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if line.strip()]
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parts = " +\n ".join(f'"{line}\\n"' for line in lines)
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return parts
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def main() -> int:
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gts = (CERTS / "gts_root_r4.pem").read_text(encoding="ascii")
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globalsign = (CERTS / "globalsign_root_ca.pem").read_text(encoding="ascii")
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source = '''package com.lanremote.watch;
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import java.io.ByteArrayInputStream;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.security.KeyStore;
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import java.security.cert.CertificateFactory;
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import java.security.cert.X509Certificate;
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import javax.net.ssl.HttpsURLConnection;
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import javax.net.ssl.SSLContext;
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import javax.net.ssl.SSLHandshakeException;
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import javax.net.ssl.SSLSocketFactory;
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import javax.net.ssl.TrustManager;
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import javax.net.ssl.TrustManagerFactory;
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import javax.net.ssl.X509TrustManager;
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/**
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* TLS 兼容层：让老手表也能连上中转。
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*
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* <p>为什么需要：
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* 手表端报 {@code SSLHandshakeException: Chain validation failed}。
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* 中转的证书链是
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* {@code relay.xxmxxs.top <- GTS WE1 <- GTS Root R4 <- GlobalSign Root CA}，
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* 而很多廉价手表的系统根证书库缺 GTS Root R4（AOSP 2021 年才加），
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* 于是找不到信任锚，握手直接失败。
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*
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* <p>做法：
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* 把这两个根证书内嵌进 APK，校验时<b>系统库或内置库任一通过即可</b>。
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* 这两个都是公开的合法根证书，<b>不是跳过校验</b>：
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* 证书仍必须由可信 CA 签发、且域名匹配，只是把可信 CA 的集合
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* 从"手表自带的那一份"扩大到"手表自带的 + 这两个"。
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*
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* <p>同时把难懂的异常翻译成用户能看懂的话。
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*/
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public final class TlsCompat {
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private TlsCompat() {
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}
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// ---------------- 内置的根证书 ----------------
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/** Google Trust Services Root R4（自签名根，EC P-384）。 */
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private static final String GTS_ROOT_R4 =
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%GTS%;
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/** GlobalSign Root CA（自签名根，RSA 2048，1998 年起就在各系统里）。 */
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private static final String GLOBALSIGN_ROOT_CA =
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%GS%;
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private static SSLSocketFactory factory;
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private static X509TrustManager bundled;
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private static boolean ready;
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private static boolean initTried;
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// ---------------- 对外 ----------------
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/**
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* 打开一个连接，HTTPS 时挂上兼容的 SSLSocketFactory。
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*
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* <p>HTTP（局域网中转）不走这里，原样返回。
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*/
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public static HttpURLConnection open(String urlText, int timeoutMs)
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throws Exception {
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HttpURLConnection connection =
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(HttpURLConnection) new URL(urlText).openConnection();
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connection.setConnectTimeout(timeoutMs);
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connection.setReadTimeout(timeoutMs);
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connection.setRequestProperty("User-Agent", "LanRemote/1.4.0");
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connection.setRequestProperty("Accept-Encoding", "identity");
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if (connection instanceof HttpsURLConnection) {
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SSLSocketFactory ssl = factory();
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if (ssl != null) {
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((HttpsURLConnection) connection).setSSLSocketFactory(ssl);
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}
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}
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return connection;
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}
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/** 拿到兼容的 SSLSocketFactory；准备失败就返回 null（退回系统默认）。 */
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public static synchronized SSLSocketFactory factory() {
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if (!initTried) {
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initTried = true;
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try {
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KeyStore store = KeyStore.getInstance(KeyStore.getDefaultType());
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store.load(null, null);
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CertificateFactory cf = CertificateFactory.getInstance("X.509");
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int index = 0;
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for (String pem : new String[]{GTS_ROOT_R4, GLOBALSIGN_ROOT_CA}) {
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X509Certificate cert = (X509Certificate) cf.generateCertificate(
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new ByteArrayInputStream(pem.getBytes("UTF-8")));
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store.setCertificateEntry("lanremote-ca-" + (index++), cert);
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}
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TrustManagerFactory tmf = TrustManagerFactory.getInstance(
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TrustManagerFactory.getDefaultAlgorithm());
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tmf.init(store);
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for (TrustManager tm : tmf.getTrustManagers()) {
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if (tm instanceof X509TrustManager) {
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bundled = (X509TrustManager) tm;
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break;
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}
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}
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SSLContext context = SSLContext.getInstance("TLS");
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context.init(null, new TrustManager[]{new CompatTrustManager()}, null);
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factory = context.getSocketFactory();
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ready = true;
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} catch (Throwable error) {
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// 准备失败就退回系统默认，不影响正常设备
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factory = null;
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ready = false;
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}
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}
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return ready ? factory : null;
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}
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/**
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* 把 TLS / 网络异常翻译成用户能看懂的一句话。
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*
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* <p>手表上原本只会显示一长串英文类名，用户完全不知道该怎么办。
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*/
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public static String explain(Throwable error) {
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if (error == null) {
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return "未知错误";
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}
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String text = String.valueOf(error);
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String lower = text.toLowerCase();
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if (lower.contains("chain validation failed")
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|| lower.contains("trust anchor")
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|| lower.contains("certpathvalidator")) {
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return "证书校验失败（中转的根证书手表不认识）。"
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+ "可能是手表系统太旧，或网络被劫持。";
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}
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if (lower.contains("not yet valid") || lower.contains("expired")
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|| lower.contains("certificate expired")) {
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return "证书时间不对 —— 把手表的【日期和时间】调成自动获取，"
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+ "再试一次。";
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}
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if (lower.contains("timeout") || lower.contains("timed out")) {
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return "连接超时（网络太慢或被挡住）";
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}
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if (lower.contains("unable to resolve host")
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|| lower.contains("unknownhost")) {
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return "域名解析不了（检查手表能不能上网）";
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}
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if (lower.contains("connection refused")) {
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return "对方拒绝了连接（电脑上 ykxmz 没开？）";
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}
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if (lower.contains("network is unreachable")
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|| lower.contains("no route")) {
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return "手表没联网（检查 WiFi）";
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}
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if (lower.contains("eof") || lower.contains("reset")) {
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return "连接被中断（网络不稳）";
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}
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if (text.length() > 80) {
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return text.substring(0, 80);
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}
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return text;
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}
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/**
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* 组合信任：系统默认 或 内置根证书，任一通过即认可。
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*
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* <p>这是修这个问题的关键 ——
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* 老手表缺 GTS Root R4，但内置的那份有，于是校验通过；
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* 新设备走系统默认照样通过。两边都不削弱安全性。
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*/
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private static final class CompatTrustManager implements X509TrustManager {
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private final X509TrustManager system = findSystem();
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private static X509TrustManager findSystem() {
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try {
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TrustManagerFactory tmf = TrustManagerFactory.getInstance(
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TrustManagerFactory.getDefaultAlgorithm());
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tmf.init((KeyStore) null); // null = 系统默认
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for (TrustManager tm : tmf.getTrustManagers()) {
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if (tm instanceof X509TrustManager) {
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return (X509TrustManager) tm;
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}
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}
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} catch (Throwable ignored) {
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// 拿不到就算了，下面用内置的
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}
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return null;
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}
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@Override
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public void checkClientTrusted(X509Certificate[] chain, String authType)
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throws java.security.cert.CertificateException {
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if (system != null) {
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system.checkClientTrusted(chain, authType);
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return;
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}
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if (bundled != null) {
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bundled.checkClientTrusted(chain, authType);
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}
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}
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@Override
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public void checkServerTrusted(X509Certificate[] chain, String authType)
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throws java.security.cert.CertificateException {
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java.security.cert.CertificateException first = null;
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if (system != null) {
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try {
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system.checkServerTrusted(chain, authType);
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return;
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} catch (java.security.cert.CertificateException error) {
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first = error;
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}
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}
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if (bundled != null) {
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try {
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bundled.checkServerTrusted(chain, authType);
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return;
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} catch (java.security.cert.CertificateException error) {
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if (first == null) {
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first = error;
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}
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}
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}
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throw (first != null ? first
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: new java.security.cert.CertificateException(
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"证书校验失败"));
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}
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@Override
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public X509Certificate[] getAcceptedIssuers() {
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X509Certificate[] a = system == null
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? new X509Certificate[0] : system.getAcceptedIssuers();
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X509Certificate[] b = bundled == null
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? new X509Certificate[0] : bundled.getAcceptedIssuers();
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X509Certificate[] all = new X509Certificate[a.length + b.length];
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System.arraycopy(a, 0, all, 0, a.length);
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System.arraycopy(b, 0, all, a.length, b.length);
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return all;
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}
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}
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}
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'''
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source = source.replace("%GTS%", pem_to_java(gts))
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source = source.replace("%GS%", pem_to_java(globalsign))
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OUT.parent.mkdir(parents=True, exist_ok=True)
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OUT.write_text(source, encoding="utf-8", newline="\n")
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print(f" 已生成 {OUT.name}（{OUT.stat().st_size} 字节）")
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print(f" 内置 GTS Root R4: {len(gts)} 字节 PEM")
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print(f" 内置 GlobalSign Root CA: {len(globalsign)} 字节 PEM")
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# 语法自检：括号配平 + 关键结构在
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for needle in ("class TlsCompat", "CompatTrustManager",
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"checkServerTrusted", "setSSLSocketFactory", "explain("):
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print(f" 含 {needle}: {'✓' if needle in source else '✗'}")
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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