mirror of
https://github.com/TeaOSLab/EdgeNode.git
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160 lines
4.7 KiB
Go
160 lines
4.7 KiB
Go
// Copyright 2022 GoEdge goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
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package waf
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import (
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"crypto/md5"
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"fmt"
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"github.com/TeaOSLab/EdgeCommon/pkg/nodeconfigs"
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"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs/firewallconfigs"
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"github.com/TeaOSLab/EdgeNode/internal/utils/counters"
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"github.com/TeaOSLab/EdgeNode/internal/waf/requests"
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"github.com/iwind/TeaGo/types"
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"net/http"
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"strings"
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"time"
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)
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type JSCookieAction struct {
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BaseAction
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Life int32 `yaml:"life" json:"life"`
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MaxFails int `yaml:"maxFails" json:"maxFails"` // 最大失败次数
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FailBlockTimeout int `yaml:"failBlockTimeout" json:"failBlockTimeout"` // 失败拦截时间
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Scope string `yaml:"scope" json:"scope"`
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FailBlockScopeAll bool `yaml:"failBlockScopeAll" json:"failBlockScopeAll"`
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}
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func (this *JSCookieAction) Init(waf *WAF) error {
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if waf.DefaultJSCookieAction != nil {
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if this.Life <= 0 {
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this.Life = waf.DefaultJSCookieAction.Life
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}
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if this.MaxFails <= 0 {
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this.MaxFails = waf.DefaultJSCookieAction.MaxFails
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}
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if this.FailBlockTimeout <= 0 {
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this.FailBlockTimeout = waf.DefaultJSCookieAction.FailBlockTimeout
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}
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if len(this.Scope) == 0 {
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this.Scope = waf.DefaultJSCookieAction.Scope
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}
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this.FailBlockScopeAll = waf.DefaultJSCookieAction.FailBlockScopeAll
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}
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if len(this.Scope) == 0 {
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this.Scope = firewallconfigs.FirewallScopeGlobal
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}
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return nil
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}
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func (this *JSCookieAction) Code() string {
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return ActionJavascriptCookie
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}
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func (this *JSCookieAction) IsAttack() bool {
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return false
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}
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func (this *JSCookieAction) WillChange() bool {
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return true
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}
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func (this *JSCookieAction) Perform(waf *WAF, group *RuleGroup, set *RuleSet, req requests.Request, writer http.ResponseWriter) PerformResult {
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// 是否在白名单中
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if SharedIPWhiteList.Contains("set:"+types.String(set.Id), this.Scope, req.WAFServerId(), req.WAFRemoteIP()) {
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return PerformResult{
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ContinueRequest: true,
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}
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}
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nodeConfig, err := nodeconfigs.SharedNodeConfig()
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if err != nil {
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return PerformResult{
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ContinueRequest: true,
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}
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}
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var life = this.Life
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if life <= 0 {
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life = 3600
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}
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// 检查Cookie
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var cookieName = "ge_js_validator_" + types.String(set.Id)
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cookie, err := req.WAFRaw().Cookie(cookieName)
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if err == nil && cookie != nil {
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var cookieValue = cookie.Value
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if len(cookieValue) > 10 {
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var pieces = strings.Split(cookieValue, "@")
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if len(pieces) == 3 {
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var timestamp = pieces[0]
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var sum = pieces[2]
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if types.Int64(timestamp) >= time.Now().Unix()-int64(life) && fmt.Sprintf("%x", md5.Sum([]byte(timestamp+"@"+types.String(set.Id)+"@"+nodeConfig.NodeId))) == sum {
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return PerformResult{
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ContinueRequest: true,
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}
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}
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}
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}
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}
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req.ProcessResponseHeaders(writer.Header(), http.StatusOK)
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writer.Header().Set("Content-Type", "text/html; charset=utf-8")
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writer.Header().Set("Cache-Control", "no-cache")
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var timestamp = types.String(time.Now().Unix())
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var cookieValue = timestamp + "@" + types.String(set.Id) + "@" + fmt.Sprintf("%x", md5.Sum([]byte(timestamp+"@"+types.String(set.Id)+"@"+nodeConfig.NodeId)))
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var respHTML = `<!DOCTYPE html>
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<html>
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<head>
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<title></title>
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<meta charset="UTF-8"/>
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<script type="text/javascript">
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document.cookie = "` + cookieName + `=` + cookieValue + `; path=/; max-age=` + types.String(life) + `;";
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window.location.reload();
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</script>
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</head>
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<body>
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</body>
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</html>`
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writer.Header().Set("Content-Length", types.String(len(respHTML)))
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writer.WriteHeader(http.StatusOK)
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_, _ = writer.Write([]byte(respHTML))
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// 记录失败次数
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this.increaseFails(req, waf.Id, group.Id, set.Id, waf.UseLocalFirewall && (this.FailBlockScopeAll || this.Scope == firewallconfigs.FirewallScopeGlobal))
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return PerformResult{}
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}
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func (this *JSCookieAction) increaseFails(req requests.Request, policyId int64, groupId int64, setId int64, useLocalFirewall bool) (goNext bool) {
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var maxFails = this.MaxFails
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var failBlockTimeout = this.FailBlockTimeout
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if maxFails <= 0 {
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maxFails = 10 // 默认10次
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} else if maxFails <= 5 {
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maxFails = 5 // 不能小于3，防止意外刷新出现
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}
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if failBlockTimeout <= 0 {
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failBlockTimeout = 1800 // 默认1800s
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}
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var key = "WAF:JS_COOKIE:FAILS:" + req.WAFRemoteIP() + ":" + types.String(req.WAFServerId()) + ":" + req.WAFRaw().URL.String()
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var countFails = counters.SharedCounter.IncreaseKey(key, 300)
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if int(countFails) >= maxFails {
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SharedIPBlackList.RecordIP(IPTypeAll, firewallconfigs.FirewallScopeServer, req.WAFServerId(), req.WAFRemoteIP(), time.Now().Unix()+int64(failBlockTimeout), policyId, useLocalFirewall, groupId, setId, "JS_COOKIE验证连续失败超过"+types.String(maxFails)+"次")
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return false
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}
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return true
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}
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