安全模块大规模重构：151文件从com.aluer.security分包到8个子包
新包结构： - com.aluer.anticheat.combat (16) — KillAura/Reach/Criticals/CrystalAura/Totem等战斗反作弊 - com.aluer.anticheat.movement (18) — Fly/Speed/Jesus/NoFall/Timer/Phase等移动反作弊 - com.aluer.anticheat.world (14) — Nuker/Xray/AutoMine/VeinMiner等世界反作弊 - com.aluer.anticheat.player (8) — FakePlayer/AltAccount/NameSpoof等玩家反作弊 - com.aluer.network (32) — DDoS/Protocol/TokenBucket/Firewall等网络安全 - com.aluer.server (10) — ChunkLoad/EntityCount/Redstone/CrashExploit等服务器保护 - com.aluer.chat (5) — ChatFlood/Advertisement/Phishing/CommandAbuse等聊天安全 - com.aluer.defense (50) — WAF/IDS/IPS/Honeypot/EDR/Forensics等纵深防御 所有package声明+跨包import已更新，323测试全绿
This commit is contained in:
Peijun Zhao
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package com.aluer.anticheat.player;
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import com.aluer.config.ServerGuardConfig;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import java.text.Normalizer;
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import java.time.Instant;
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import java.util.*;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.atomic.AtomicLong;
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/**
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* 玩家名称冒充检测 — V4.0 访问控制模块
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*
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* 检测原理：
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* 1. 检测新加入玩家的名称是否通过Unicode同形字符（homoglyph）冒充现有玩家或管理员
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* - 例如用 ᴀ (U+1D00) 替换 A, 用 ο (Greek omicron U+03BF) 替换 o
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* - 用 і (Cyrillic U+0456) 替换 i, 用 а (Cyrillic U+0430) 替换 a
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* 2. 检测包含不可见/零宽字符的玩家名（U+200B零宽空格、U+200C零宽非连接符等）
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* 这些字符在视觉上不可见但会使玩家名在系统中识别为不同名称
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* 3. 大小写欺骗检测：Admin → admin, ADMIN, Admín 等变体
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* Minecraft用户名不区分大小写，但利用相似Unicode字符可绕过展示层检查
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* 4. 维护已知冒充目标名单（所有在线OP玩家名 + 知名Minecraft人物名 + 服务器自定义名单）
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* 新玩家加入时计算与该名单中每一项的相似度
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* 5. 使用 Levenshtein 编辑距离算法计算名称相似度，并配合 Unicode NFKC 标准化后比对
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* 相似度阈值可配置，超过阈值的名称标记为冒充尝试
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* 6. 检测名称中包含的空格/特殊前缀后缀（如 [Admin] PlayerName 格式混淆）
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*
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* 配置开关：serverguard.security.super-evolution.anti-name-spoof
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*/
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@Service
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public class AntiNameSpoofService {
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private final ServerGuardConfig config;
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/** 需保护的名称集合：OP名、管理员名、知名人物名 */
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private final Set<String> protectedNames = ConcurrentHashMap.newKeySet();
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/** 自定义虚假目标（特殊名单） */
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private final Set<String> customSpoofTargets = ConcurrentHashMap.newKeySet();
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/** 已检测到的冒充尝试 */
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private final Map<String, List<SpoofAttempt>> spoofHistory = new ConcurrentHashMap<>();
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/** 已被阻止的冒充名称集合 */
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private final Set<String> blockedNames = ConcurrentHashMap.newKeySet();
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private final AtomicLong totalNameChecks = new AtomicLong(0);
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private final AtomicLong spoofAttempts = new AtomicLong(0);
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/**
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* Unicode同形字符映射表：视觉相似但Unicode码点不同的字符
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* key = 标准ASCII字母，value = 其Unicode同形字符列表
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*/
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private static final Map<Character, List<Character>> HOMOGLYPH_MAP = Map.ofEntries(
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Map.entry('A', List.of('A', 'A', 'Á', 'À', 'Â', 'Ã', 'Ä', 'Å', 'Ā', 'Ă', 'Ą')),
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Map.entry('a', List.of('a', 'á', 'à', 'â', 'ã', 'ä', 'å', 'ā', 'ă', 'ą', '@')),
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Map.entry('B', List.of('B', 'ß', 'Þ')),
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Map.entry('b', List.of('b', 'þ')),
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Map.entry('C', List.of('C', 'Ç', 'Ć', 'Č')),
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Map.entry('c', List.of('c', 'ç', 'ć', 'č')),
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Map.entry('E', List.of('E', 'È', 'É', 'Ê', 'Ë', 'Ē', 'Ĕ', 'Ė', 'Ę', 'Ě')),
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Map.entry('e', List.of('e', 'è', 'é', 'ê', 'ë', 'ē', 'ĕ', 'ė', 'ę', 'ě')),
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Map.entry('H', List.of('H', 'Ĥ', 'Ħ')),
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Map.entry('h', List.of('h', 'ĥ', 'ħ')),
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Map.entry('I', List.of('I', 'Ì', 'Í', 'Î', 'Ï', 'Ĩ', 'Ī', 'Ĭ', 'Į', 'İ')),
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Map.entry('i', List.of('i', 'ì', 'í', 'î', 'ï', 'ĩ', 'ī', 'ĭ', 'į', 'ı', '¡')),
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Map.entry('K', List.of('K', 'Ķ', 'Œ')),
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Map.entry('k', List.of('k', 'ķ', 'ĸ')),
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Map.entry('l', List.of('l', 'ł', 'ŀ', 'ĺ', 'ļ', 'ľ')),
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Map.entry('N', List.of('N', 'Ñ', 'Ń', 'Ņ', 'Ň')),
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Map.entry('n', List.of('n', 'ñ', 'ń', 'ņ', 'ň', 'ʼn')),
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Map.entry('O', List.of('O', 'Ò', 'Ó', 'Ô', 'Õ', 'Ö', 'Ø', 'Ō', 'Ŏ', 'Ő')),
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Map.entry('o', List.of('o', 'ò', 'ó', 'ô', 'õ', 'ö', 'ø', 'ō', 'ŏ', 'ő', 'ο', 'о')),
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Map.entry('P', List.of('P', 'Þ')),
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Map.entry('p', List.of('p', 'þ')),
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Map.entry('S', List.of('S', 'Ś', 'Ŝ', 'Ş', 'Š')),
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Map.entry('s', List.of('s', 'ś', 'ŝ', 'ş', 'š')),
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Map.entry('T', List.of('T', 'Ţ', 'Ť', 'Ŧ')),
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Map.entry('t', List.of('t', 'ţ', 'ť', 'ŧ')),
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Map.entry('U', List.of('U', 'Ù', 'Ú', 'Û', 'Ü', 'Ũ', 'Ū', 'Ŭ', 'Ů', 'Ű', 'Ų')),
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Map.entry('u', List.of('u', 'ù', 'ú', 'û', 'ü', 'ũ', 'ū', 'ŭ', 'ů', 'ű', 'ų', 'µ')),
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Map.entry('Y', List.of('Y', 'Ý', 'Ŷ', 'Ÿ')),
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Map.entry('y', List.of('y', 'ý', 'ÿ', 'ŷ')),
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Map.entry('Z', List.of('Z', 'Ź', 'Ż', 'Ž')),
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Map.entry('z', List.of('z', 'ź', 'ż', 'ž'))
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);
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/** 零宽/不可见Unicode字符 */
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private static final Set<Character> INVISIBLE_CHARACTERS = Set.of(
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'', // 零宽空格 Zero Width Space
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'', // 零宽非连接符 Zero Width Non-Joiner
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'', // 零宽连接符 Zero Width Joiner
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'', // 左到右标记 Left-to-Right Mark
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'', // 右到左标记 Right-to-Left Mark
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'', // 词连接符 Word Joiner
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'', // 函数应用 Function Application
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'', // 不可见乘号 Invisible Times
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'', // 不可见分隔符 Invisible Separator
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'', // 不可见加号 Invisible Plus
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'', // 零宽不中断空格 Zero Width No-Break Space / BOM
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'', // 软连接符 Soft Hyphen
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'͏', // 组合用字素连接符 Combining Grapheme Joiner
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'', // 阿拉伯字母格式标记 Arabic Letter Mark
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'', // 蒙古语元音分隔符（已在Unicode 6.3弃用但仍可能被滥用）
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'', // 左到右隔离 Left-to-Right Isolate
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'', // 右到左隔离 Right-to-Left Isolate
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'', // 第一个强隔离 First Strong Isolate
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'' // 弹出方向隔离 Pop Directional Isolate
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);
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/** Minecraft知名人物名（常被冒充目标） */
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private static final Set<String> WELL_KNOWN_NAMES = Set.of(
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"Notch", "jeb_", "Dinnerbone", "Grumm",
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"Dream", "Technoblade", "TommyInnit", "Philza",
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"MumboJumbo", "Grian", "Iskall85", "Scar",
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"CaptainSparklez", "DanTDM", "PrestonPlayz",
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"Hypixel", "Spigot", "Paper", "Mojang", "Microsoft",
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"Administrator", "Owner", "Admin"
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);
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/** 相似度阈值（Levenshtein距离占名称长度的比例，0-1，越小越相似） */
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private static final double LEVENSHTEIN_SIMILARITY_THRESHOLD = 0.3;
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/** Minecraft玩家名最大长度 */
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private static final int MAX_PLAYERNAME_LENGTH = 16;
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/** 无参构造函数，使用默认配置 */
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public AntiNameSpoofService() {
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this(new ServerGuardConfig());
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}
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@Autowired
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public AntiNameSpoofService(ServerGuardConfig config) {
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this.config = config;
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// 初始化默认保护名单：知名Minecraft人物名
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protectedNames.addAll(WELL_KNOWN_NAMES);
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}
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/**
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* 检查新加入玩家的名称是否在冒充其他玩家/管理员
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*
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* @param playerName 待检查的玩家名
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* @param ip 玩家IP（用于日志记录）
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* @return 检测结果，包含是否检测到冒充及原因
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*/
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public NameSpoofResult checkPlayerName(String playerName, String ip) {
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totalNameChecks.incrementAndGet();
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// 配置开关检查
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if (!config.getSecurity().getSuperEvolution().isAntiNameSpoof()) {
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return NameSpoofResult.clean();
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}
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if (playerName == null || playerName.isBlank()) {
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return NameSpoofResult.clean();
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}
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// Minecraft玩家名不应超过16字符
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if (playerName.length() > MAX_PLAYERNAME_LENGTH) {
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return NameSpoofResult.clean(); // 长度异常在其他模块处理
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}
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List<String> reasons = new ArrayList<>();
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boolean spoofDetected = false;
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Instant now = Instant.now();
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// 检查1：零宽/不可见字符检测
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String visibleName = removeInvisibleCharacters(playerName);
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if (!visibleName.equals(playerName)) {
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spoofDetected = true;
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spoofAttempts.incrementAndGet();
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reasons.add("INVISIBLE_CHARS: Player name \"" + escapeName(playerName)
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+ "\" contains invisible/zero-width Unicode characters ("
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+ countInvisibleChars(playerName) + " chars detected) — "
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+ "can be used to impersonate \"" + visibleName + "\"");
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blockedNames.add(playerName);
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recordSpoofAttempt(playerName, visibleName, "INVISIBLE_CHARS", ip, now);
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}
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// 检查2：Unicode标准化后的差异对比
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String normalized = normalizeForComparison(playerName);
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if (!spoofDetected) {
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for (String protectedName : protectedNames) {
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String normalizedProtected = normalizeForComparison(protectedName);
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if (normalized.equalsIgnoreCase(normalizedProtected)) {
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spoofDetected = true;
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spoofAttempts.incrementAndGet();
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reasons.add("UNICODE_SPOOF: Player name \"" + playerName
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+ "\" uses Unicode characters to visually mimic \"" + protectedName
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+ "\" (normalized: " + normalized + " == " + normalizedProtected + ")");
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blockedNames.add(playerName);
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recordSpoofAttempt(playerName, protectedName, "UNICODE_SPOOF", ip, now);
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break;
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}
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}
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}
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// 检查3：大小写欺骗（不区分大小写比对后，名称匹配但大小写不同）
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if (!spoofDetected) {
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String lowerPlayer = playerName.toLowerCase(Locale.ROOT);
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for (String protectedName : protectedNames) {
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String lowerProtected = protectedName.toLowerCase(Locale.ROOT);
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if (lowerPlayer.equals(lowerProtected) && !playerName.equals(protectedName)) {
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// 确认不是同一个名字（大小写差异的另一个实现方式）
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spoofDetected = true;
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spoofAttempts.incrementAndGet();
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reasons.add("CASE_SPOOF: Player name \"" + playerName
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+ "\" uses different case to impersonate \"" + protectedName + "\"");
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blockedNames.add(playerName);
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recordSpoofAttempt(playerName, protectedName, "CASE_SPOOF", ip, now);
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break;
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}
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}
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}
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// 检查4：Levenshtein编辑距离相似度检测
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if (!spoofDetected) {
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for (String protectedName : protectedNames) {
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double similarity = levenshteinSimilarity(playerName.toLowerCase(Locale.ROOT),
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protectedName.toLowerCase(Locale.ROOT));
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if (similarity < LEVENSHTEIN_SIMILARITY_THRESHOLD
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&& playerName.length() >= 3 && protectedName.length() >= 3) {
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// 排除完全不同的短名称误报
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if (Math.abs(playerName.length() - protectedName.length()) <= 2) {
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spoofDetected = true;
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spoofAttempts.incrementAndGet();
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reasons.add("SIMILARITY_SPOOF: Player name \"" + playerName
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+ "\" is highly similar to protected name \"" + protectedName
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+ "\" (Levenshtein distance: " + String.format("%.2f", similarity) + ")");
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blockedNames.add(playerName);
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recordSpoofAttempt(playerName, protectedName, "SIMILARITY_SPOOF", ip, now);
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break;
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}
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}
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}
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}
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if (spoofDetected) {
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return NameSpoofResult.spoofed(reasons);
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}
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return NameSpoofResult.clean();
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}
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/**
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* 添加一个需要保护的名称（OP玩家名、管理员名等）
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*
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* @param name 需保护的名称
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*/
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public void addProtectedName(String name) {
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if (name != null && !name.isBlank()) {
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protectedNames.add(name);
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}
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}
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/**
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* 批量添加受保护的名称
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*
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* @param names 需保护的名称列表
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*/
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public void addProtectedNames(Collection<String> names) {
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if (names != null) {
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protectedNames.addAll(names);
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}
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}
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/**
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* 从受保护名单中移除名称
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*
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* @param name 名称
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*/
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public void removeProtectedName(String name) {
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if (name != null) {
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protectedNames.remove(name);
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}
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}
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/**
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* 获取所有受保护的名称
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*
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* @return 受保护名称集合
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*/
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public Set<String> getProtectedNames() {
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return new HashSet<>(protectedNames);
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}
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/**
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* 获取模块运行状态
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*
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* @return 状态Map，包含totalNameChecks/spoofAttempts/blockedNames
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*/
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public Map<String, Object> getStatus() {
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Map<String, Object> s = new LinkedHashMap<>();
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s.put("enabled", config.getSecurity().getSuperEvolution().isAntiNameSpoof());
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s.put("totalNameChecks", totalNameChecks.get());
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s.put("spoofAttempts", spoofAttempts.get());
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s.put("blockedNames", blockedNames.size());
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s.put("protectedNames", protectedNames.size());
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s.put("blockedNameList", new ArrayList<>(blockedNames));
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s.put("protectedNameList", new ArrayList<>(protectedNames));
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// 最近10次冒充尝试
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List<Map<String, Object>> recent = new ArrayList<>();
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int total = 0;
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for (List<SpoofAttempt> attempts : spoofHistory.values()) {
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for (SpoofAttempt a : attempts) {
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if (total < 10) {
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Map<String, Object> m = new LinkedHashMap<>();
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m.put("time", a.time.toString());
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m.put("playerName", a.playerName);
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m.put("target", a.targetName);
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m.put("type", a.spoofType);
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m.put("ip", a.ip);
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recent.add(m);
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}
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total++;
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}
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}
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s.put("recentSpoofAttempts", recent);
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return s;
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}
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// ==================== 内部辅助方法 ====================
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/**
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* 移除字符串中的所有零宽/不可见Unicode字符
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* 用于显示清洗后的可见名称，以及底层对比
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*/
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private String removeInvisibleCharacters(String input) {
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if (input == null) return null;
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StringBuilder sb = new StringBuilder();
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for (int i = 0; i < input.length(); i++) {
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char c = input.charAt(i);
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if (!INVISIBLE_CHARACTERS.contains(c)) {
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sb.append(c);
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}
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}
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return sb.toString();
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}
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/** 统计不可见字符数量 */
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private int countInvisibleChars(String input) {
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if (input == null) return 0;
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int count = 0;
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for (int i = 0; i < input.length(); i++) {
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if (INVISIBLE_CHARACTERS.contains(input.charAt(i))) {
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count++;
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}
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}
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return count;
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}
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/**
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* Unicode NFKC标准化后转为小写，用于名称的公平比对
|
||||
* NFKC会将兼容性字符分解并重新组合（例如将全角字母转为半角）
|
||||
*/
|
||||
private String normalizeForComparison(String input) {
|
||||
if (input == null) return "";
|
||||
// 先移除不可见字符，再NFKC标准化，再转小写
|
||||
String cleaned = removeInvisibleCharacters(input);
|
||||
return Normalizer.normalize(cleaned, Normalizer.Form.NFKC).toLowerCase(Locale.ROOT);
|
||||
}
|
||||
|
||||
/**
|
||||
* 计算两个字符串之间的Levenshtein编辑距离相似度
|
||||
* 返回值 = 编辑距离 / 最大字符串长度（结果越小越相似）
|
||||
*
|
||||
* @param s1 字符串1
|
||||
* @param s2 字符串2
|
||||
* @return 标准化相似度（0=完全相同，1=完全不同）
|
||||
*/
|
||||
private double levenshteinSimilarity(String s1, String s2) {
|
||||
if (s1 == null || s2 == null) return 1.0;
|
||||
if (s1.equals(s2)) return 0.0;
|
||||
|
||||
int[][] dp = new int[s1.length() + 1][s2.length() + 1];
|
||||
for (int i = 0; i <= s1.length(); i++) dp[i][0] = i;
|
||||
for (int j = 0; j <= s2.length(); j++) dp[0][j] = j;
|
||||
|
||||
for (int i = 1; i <= s1.length(); i++) {
|
||||
for (int j = 1; j <= s2.length(); j++) {
|
||||
int cost = s1.charAt(i - 1) == s2.charAt(j - 1) ? 0 : 1;
|
||||
dp[i][j] = Math.min(Math.min(
|
||||
dp[i - 1][j] + 1, // 删除
|
||||
dp[i][j - 1] + 1), // 插入
|
||||
dp[i - 1][j - 1] + cost); // 替换
|
||||
}
|
||||
}
|
||||
|
||||
int maxLen = Math.max(s1.length(), s2.length());
|
||||
if (maxLen == 0) return 0.0;
|
||||
return (double) dp[s1.length()][s2.length()] / maxLen;
|
||||
}
|
||||
|
||||
/** 将名称中的不可见字符转换为Unicode转义序列用于安全日志输出 */
|
||||
private String escapeName(String name) {
|
||||
if (name == null) return "null";
|
||||
StringBuilder sb = new StringBuilder();
|
||||
for (int i = 0; i < name.length(); i++) {
|
||||
char c = name.charAt(i);
|
||||
if (INVISIBLE_CHARACTERS.contains(c)) {
|
||||
sb.append(String.format("\\u%04X", (int) c));
|
||||
} else {
|
||||
sb.append(c);
|
||||
}
|
||||
}
|
||||
return sb.toString();
|
||||
}
|
||||
|
||||
/** 记录一次冒充尝试 */
|
||||
private void recordSpoofAttempt(String playerName, String targetName, String spoofType, String ip, Instant time) {
|
||||
SpoofAttempt attempt = new SpoofAttempt(time, playerName, targetName, spoofType, ip);
|
||||
spoofHistory.computeIfAbsent(playerName, k -> Collections.synchronizedList(new ArrayList<>())).add(attempt);
|
||||
}
|
||||
|
||||
// ==================== 内部数据类 ====================
|
||||
|
||||
/** 冒充尝试记录 */
|
||||
private static class SpoofAttempt {
|
||||
final Instant time;
|
||||
final String playerName;
|
||||
final String targetName;
|
||||
final String spoofType;
|
||||
final String ip;
|
||||
|
||||
SpoofAttempt(Instant time, String playerName, String targetName, String spoofType, String ip) {
|
||||
this.time = time;
|
||||
this.playerName = playerName;
|
||||
this.targetName = targetName;
|
||||
this.spoofType = spoofType;
|
||||
this.ip = ip;
|
||||
}
|
||||
}
|
||||
|
||||
/** 名称冒充检测结果 */
|
||||
public static class NameSpoofResult {
|
||||
private final boolean spoofed;
|
||||
private final List<String> reasons;
|
||||
|
||||
private NameSpoofResult(boolean spoofed, List<String> reasons) {
|
||||
this.spoofed = spoofed;
|
||||
this.reasons = reasons;
|
||||
}
|
||||
|
||||
public static NameSpoofResult clean() {
|
||||
return new NameSpoofResult(false, List.of());
|
||||
}
|
||||
|
||||
public static NameSpoofResult spoofed(List<String> reasons) {
|
||||
return new NameSpoofResult(true, reasons);
|
||||
}
|
||||
|
||||
public boolean isSpoofed() { return spoofed; }
|
||||
public boolean isClean() { return !spoofed; }
|
||||
public List<String> getReasons() { return reasons; }
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user