Merge pull request #338 from wsczx/dev

重构防爆逻辑
2025-08-08 13:49:24 +08:00 · 2024-10-05 08:27:41 +08:00
parent 175ffd3c3a 1c6fc446c9
commit 57b9e1dc7b
5 changed files with 404 additions and 83 deletions
--- a/server/handler/antiBruteForce.go
+++ b/server/handler/antiBruteForce.go
@@ -3,6 +3,8 @@ package handler
 import (
 	"encoding/xml"
 	"io"
+	"log"
+	"net"
 	"net/http"
 	"strings"
 	"sync"
@@ -11,58 +13,38 @@ import (
 	"github.com/bjdgyc/anylink/base"
 )

-// UserState 用于存储用户的登录状态
-type UserState struct {
-	FailureCount int
-	LastAttempt  time.Time
-	LockTime     time.Time
-}
-
 // 自定义 contextKey 类型，避免键冲突
 type contextKey string

 // 定义常量作为上下文的键
 const loginStatusKey contextKey = "login_status"
+const defaultGlobalLockStateExpirationTime = 3600

-// 用户状态映射
-var userStates = make(map[string]*UserState)
-var mu sync.Mutex
-
-func init() {
-	go cleanupUserStates()
-}
-
-// 清理过期的登录状态
-func cleanupUserStates() {
-	ticker := time.NewTicker(1 * time.Minute)
-	defer ticker.Stop()
-
-	for range ticker.C {
-		mu.Lock()
-		now := time.Now()
-		for username, state := range userStates {
-			if now.Sub(state.LastAttempt) > time.Duration(base.Cfg.UserStateExpiration)*time.Second {
-				delete(userStates, username)
-			}
+func initAntiBruteForce() {
+	if base.Cfg.AntiBruteForce {
+		if base.Cfg.GlobalLockStateExpirationTime <= 0 {
+			base.Cfg.GlobalLockStateExpirationTime = defaultGlobalLockStateExpirationTime
 		}
-		mu.Unlock()
+		lockManager.startCleanupTicker()
+		lockManager.initIPWhitelist()
 	}
 }

 // 防爆破中间件
 func antiBruteForce(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		// 如果最大验证失败次数为0，则不启用防爆破功能
-		if base.Cfg.MaxBanCount == 0 {
+		// 防爆破功能全局开关
+		if !base.Cfg.AntiBruteForce {
 			next.ServeHTTP(w, r)
 			return
 		}
+
 		body, err := io.ReadAll(r.Body)
 		if err != nil {
 			http.Error(w, "Failed to read request body", http.StatusBadRequest)
 			return
 		}
-		r.Body.Close()
+		defer r.Body.Close()

 		cr := ClientRequest{}
 		err = xml.Unmarshal(body, &cr)
@@ -72,35 +54,55 @@ func antiBruteForce(next http.Handler) http.Handler {
 		}

 		username := cr.Auth.Username
-
-		// 更新用户登录状态
-		mu.Lock()
-		state, exists := userStates[username]
-		if !exists {
-			state = &UserState{}
-			userStates[username] = state
-		}
-		// 检查是否已超过锁定时间
-		if !state.LockTime.IsZero() {
-			if time.Now().After(state.LockTime) {
-				// 如果已经超过了锁定时间，重置失败计数和锁定时间
-				state.FailureCount = 0
-				state.LockTime = time.Time{}
-			} else {
-				// 如果还在锁定时间内，返回错误信息
-				http.Error(w, "Account locked due to too many failed attempts. Try again later.", http.StatusTooManyRequests)
-				mu.Unlock()
-				return
-			}
+		ip, _, err := net.SplitHostPort(r.RemoteAddr) // 提取纯 IP 地址，去掉端口号
+		if err != nil {
+			http.Error(w, "Unable to parse IP address", http.StatusInternalServerError)
+			return
 		}

-		// 如果超过时间窗口，重置失败计数
-		if time.Since(state.LastAttempt) > time.Duration(base.Cfg.BanResetTime)*time.Second {
-			state.FailureCount = 0
+		now := time.Now()
+		// 检查IP是否在白名单中
+		if lockManager.isWhitelisted(ip) {
+			r.Body = io.NopCloser(strings.NewReader(string(body)))
+			next.ServeHTTP(w, r)
+			return
 		}

-		state.LastAttempt = time.Now()
-		mu.Unlock()
+		// // 速率限制
+		// lockManager.mu.RLock()
+		// limiter, exists := lockManager.rateLimiter[ip]
+		// if !exists {
+		// 	limiter = rate.NewLimiter(rate.Limit(base.Cfg.RateLimit), base.Cfg.Burst)
+		// 	lockManager.rateLimiter[ip] = limiter
+		// }
+		// lockManager.mu.RUnlock()
+
+		// if !limiter.Allow() {
+		// 	log.Printf("Rate limit exceeded for IP %s. Try again later.", ip)
+		// 	http.Error(w, "Rate limit exceeded. Try again later.", http.StatusTooManyRequests)
+		// 	return
+		// }
+
+		// 检查全局 IP 锁定
+		if base.Cfg.MaxGlobalIPBanCount > 0 && lockManager.checkGlobalIPLock(ip, now) {
+			log.Printf("IP %s is globally locked. Try again later.", ip)
+			http.Error(w, "Account globally locked due to too many failed attempts. Try again later.", http.StatusTooManyRequests)
+			return
+		}
+
+		// 检查全局用户锁定
+		if base.Cfg.MaxGlobalUserBanCount > 0 && lockManager.checkGlobalUserLock(username, now) {
+			log.Printf("User %s is globally locked. Try again later.", username)
+			http.Error(w, "Account globally locked due to too many failed attempts. Try again later.", http.StatusTooManyRequests)
+			return
+		}
+
+		// 检查单个用户的 IP 锁定
+		if base.Cfg.MaxBanCount > 0 && lockManager.checkUserIPLock(username, ip, now) {
+			log.Printf("IP %s is locked for user %s. Try again later.", ip, username)
+			http.Error(w, "Account locked due to too many failed attempts. Try again later.", http.StatusTooManyRequests)
+			return
+		}

 		// 重新设置请求体以便后续处理器可以访问
 		r.Body = io.NopCloser(strings.NewReader(string(body)))
@@ -109,23 +111,295 @@ func antiBruteForce(next http.Handler) http.Handler {
 		next.ServeHTTP(w, r)

 		// 从 context 中获取登录状态
-		loginStatus, ok := r.Context().Value(loginStatusKey).(bool)
-		if !ok {
-			// 如果没有找到登录状态，默认为登录失败
-			loginStatus = false
-		}
+		loginStatus, _ := r.Context().Value(loginStatusKey).(bool)

 		// 更新用户登录状态
-		mu.Lock()
-		defer mu.Unlock()
-
-		if !loginStatus {
-			state.FailureCount++
-			if state.FailureCount >= base.Cfg.MaxBanCount {
-				state.LockTime = time.Now().Add(time.Duration(base.Cfg.LockTime) * time.Second)
-			}
-		} else {
-			state.FailureCount = 0 // 成功登录后重置
-		}
+		lockManager.updateGlobalIPLock(ip, now, loginStatus)
+		lockManager.updateGlobalUserLock(username, now, loginStatus)
+		lockManager.updateUserIPLock(username, ip, now, loginStatus)
 	})
 }
+
+type LockState struct {
+	FailureCount int
+	LockTime     time.Time
+	LastAttempt  time.Time
+}
+type IPWhitelists struct {
+	IP   net.IP
+	CIDR *net.IPNet
+}
+
+type LockManager struct {
+	mu           sync.Mutex
+	ipLocks      map[string]*LockState            // 全局IP锁定状态
+	userLocks    map[string]*LockState            // 全局用户锁定状态
+	ipUserLocks  map[string]map[string]*LockState // 单用户IP锁定状态
+	ipWhitelists []IPWhitelists                   // 全局IP白名单，包含IP地址和CIDR范围
+	// rateLimiter   map[string]*rate.Limiter         // 速率限制器
+	cleanupTicker *time.Ticker
+}
+
+var lockManager = &LockManager{
+	ipLocks:      make(map[string]*LockState),
+	userLocks:    make(map[string]*LockState),
+	ipUserLocks:  make(map[string]map[string]*LockState),
+	ipWhitelists: make([]IPWhitelists, 0),
+	// rateLimiter: make(map[string]*rate.Limiter),
+}
+
+// 初始化IP白名单
+func (lm *LockManager) initIPWhitelist() {
+	ipWhitelist := strings.Split(base.Cfg.IPWhitelist, ",")
+	for _, ipWhitelist := range ipWhitelist {
+		ipWhitelist = strings.TrimSpace(ipWhitelist)
+		if ipWhitelist == "" {
+			continue
+		}
+
+		_, ipNet, err := net.ParseCIDR(ipWhitelist)
+		if err == nil {
+			lm.ipWhitelists = append(lm.ipWhitelists, IPWhitelists{CIDR: ipNet})
+			continue
+		}
+
+		ip := net.ParseIP(ipWhitelist)
+		if ip != nil {
+			lm.ipWhitelists = append(lm.ipWhitelists, IPWhitelists{IP: ip})
+			continue
+		}
+	}
+}
+
+// 检查 IP 是否在白名单中
+func (lm *LockManager) isWhitelisted(ip string) bool {
+	clientIP := net.ParseIP(ip)
+	if clientIP == nil {
+		return false
+	}
+	for _, ipWhitelist := range lm.ipWhitelists {
+		if ipWhitelist.CIDR != nil && ipWhitelist.CIDR.Contains(clientIP) {
+			return true
+		}
+		if ipWhitelist.IP != nil && ipWhitelist.IP.Equal(clientIP) {
+			return true
+		}
+	}
+	return false
+}
+
+func (lm *LockManager) startCleanupTicker() {
+	lm.cleanupTicker = time.NewTicker(5 * time.Minute)
+	go func() {
+		for range lm.cleanupTicker.C {
+			lm.cleanupExpiredLocks()
+		}
+	}()
+}
+
+// 定期清理过期的锁定
+func (lm *LockManager) cleanupExpiredLocks() {
+	now := time.Now()
+
+	var ipKeys, userKeys []string
+	var IPuserKeys []struct{ user, ip string }
+
+	lm.mu.Lock()
+	for ip, state := range lm.ipLocks {
+		if now.Sub(state.LastAttempt) > time.Duration(base.Cfg.GlobalLockStateExpirationTime)*time.Second {
+			ipKeys = append(ipKeys, ip)
+		}
+	}
+
+	for user, state := range lm.userLocks {
+		if now.Sub(state.LastAttempt) > time.Duration(base.Cfg.GlobalLockStateExpirationTime)*time.Second {
+			userKeys = append(userKeys, user)
+		}
+	}
+
+	for user, ipMap := range lm.ipUserLocks {
+		for ip, state := range ipMap {
+			if now.Sub(state.LastAttempt) > time.Duration(base.Cfg.GlobalLockStateExpirationTime)*time.Second {
+				IPuserKeys = append(IPuserKeys, struct{ user, ip string }{user, ip})
+			}
+		}
+	}
+	lm.mu.Unlock()
+
+	lm.mu.Lock()
+	for _, ip := range ipKeys {
+		delete(lm.ipLocks, ip)
+	}
+	for _, user := range userKeys {
+		delete(lm.userLocks, user)
+	}
+	for _, key := range IPuserKeys {
+		delete(lm.ipUserLocks[key.user], key.ip)
+		if len(lm.ipUserLocks[key.user]) == 0 {
+			delete(lm.ipUserLocks, key.user)
+		}
+	}
+	lm.mu.Unlock()
+}
+
+// 检查全局 IP 锁定
+func (lm *LockManager) checkGlobalIPLock(ip string, now time.Time) bool {
+	lm.mu.Lock()
+	defer lm.mu.Unlock()
+
+	state, exists := lm.ipLocks[ip]
+	if !exists {
+		return false
+	}
+
+	// 如果超过时间窗口，重置失败计数
+	lm.resetLockStateIfExpired(state, now, base.Cfg.GlobalIPBanResetTime)
+
+	if !state.LockTime.IsZero() && now.Before(state.LockTime) {
+		return true
+	}
+
+	return false
+}
+
+// 检查全局用户锁定
+func (lm *LockManager) checkGlobalUserLock(username string, now time.Time) bool {
+	// 我也不知道为什么cisco anyconnect每次连接会先传一个空用户请求····
+	if username == "" {
+		return false
+	}
+	lm.mu.Lock()
+	defer lm.mu.Unlock()
+
+	state, exists := lm.userLocks[username]
+	if !exists {
+		return false
+	}
+	// 如果超过时间窗口，重置失败计数
+	lm.resetLockStateIfExpired(state, now, base.Cfg.GlobalUserBanResetTime)
+
+	if !state.LockTime.IsZero() && now.Before(state.LockTime) {
+		return true
+	}
+
+	return false
+}
+
+// 检查单个用户的 IP 锁定
+func (lm *LockManager) checkUserIPLock(username, ip string, now time.Time) bool {
+	// 我也不知道为什么cisco anyconnect每次连接会先传一个空用户请求····
+	if username == "" {
+		return false
+	}
+	lm.mu.Lock()
+	defer lm.mu.Unlock()
+
+	userIPMap, userExists := lm.ipUserLocks[username]
+	if !userExists {
+		return false
+	}
+
+	state, ipExists := userIPMap[ip]
+	if !ipExists {
+		return false
+	}
+
+	// 如果超过时间窗口，重置失败计数
+	lm.resetLockStateIfExpired(state, now, base.Cfg.BanResetTime)
+
+	if !state.LockTime.IsZero() && now.Before(state.LockTime) {
+		return true
+	}
+
+	return false
+}
+
+// 更新全局 IP 锁定状态
+func (lm *LockManager) updateGlobalIPLock(ip string, now time.Time, success bool) {
+	lm.mu.Lock()
+	defer lm.mu.Unlock()
+
+	state, exists := lm.ipLocks[ip]
+	if !exists {
+		state = &LockState{}
+		lm.ipLocks[ip] = state
+	}
+
+	lm.updateLockState(state, now, success, base.Cfg.MaxGlobalIPBanCount, base.Cfg.GlobalIPLockTime)
+}
+
+// 更新全局用户锁定状态
+func (lm *LockManager) updateGlobalUserLock(username string, now time.Time, success bool) {
+	// 我也不知道为什么cisco anyconnect每次连接会先传一个空用户请求····
+	if username == "" {
+		return
+	}
+	lm.mu.Lock()
+	defer lm.mu.Unlock()
+
+	state, exists := lm.userLocks[username]
+	if !exists {
+		state = &LockState{}
+		lm.userLocks[username] = state
+	}
+
+	lm.updateLockState(state, now, success, base.Cfg.MaxGlobalUserBanCount, base.Cfg.GlobalUserLockTime)
+}
+
+// 更新单个用户的 IP 锁定状态
+func (lm *LockManager) updateUserIPLock(username, ip string, now time.Time, success bool) {
+	// 我也不知道为什么cisco anyconnect每次连接会先传一个空用户请求····
+	if username == "" {
+		return
+	}
+	lm.mu.Lock()
+	defer lm.mu.Unlock()
+
+	userIPMap, userExists := lm.ipUserLocks[username]
+	if !userExists {
+		userIPMap = make(map[string]*LockState)
+		lm.ipUserLocks[username] = userIPMap
+	}
+
+	state, ipExists := userIPMap[ip]
+	if !ipExists {
+		state = &LockState{}
+		userIPMap[ip] = state
+	}
+
+	lm.updateLockState(state, now, success, base.Cfg.MaxBanCount, base.Cfg.LockTime)
+}
+
+// 更新锁定状态
+func (lm *LockManager) updateLockState(state *LockState, now time.Time, success bool, maxBanCount, lockTime int) {
+	if success {
+		state.FailureCount = 0
+		state.LockTime = time.Time{}
+	} else {
+		state.FailureCount++
+		if state.FailureCount >= maxBanCount {
+			state.LockTime = now.Add(time.Duration(lockTime) * time.Second)
+		}
+	}
+	state.LastAttempt = now
+}
+
+// 超过窗口时间和锁定时间时重置锁定状态
+func (lm *LockManager) resetLockStateIfExpired(state *LockState, now time.Time, resetTime int) {
+	if state == nil || state.LastAttempt.IsZero() {
+		return
+	}
+
+	// 如果超过锁定时间，重置锁定状态
+	if !state.LockTime.IsZero() && now.After(state.LockTime) {
+		state.FailureCount = 0
+		state.LockTime = time.Time{}
+		return
+	}
+
+	// 如果超过窗口时间，重置失败计数
+	if now.Sub(state.LastAttempt) > time.Duration(resetTime)*time.Second {
+		state.FailureCount = 0
+		state.LockTime = time.Time{}
+	}
+}
--- a/server/handler/start.go
+++ b/server/handler/start.go
@@ -17,6 +17,8 @@ func Start() {
 	sessdata.Start()
 	cron.Start()

+	initAntiBruteForce() //初始化防爆破定时器和IP白名单
+
 	// 开启服务器转发
 	err := execCmd([]string{"sysctl -w net.ipv4.ip_forward=1"})
 	if err != nil {