mirror of
https://github.com/TeaOSLab/EdgeNode.git
synced 2025-11-04 07:40:56 +08:00
263 lines
7.9 KiB
Go
263 lines
7.9 KiB
Go
package waf
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import (
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"bytes"
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"encoding/base64"
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"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs/firewallconfigs"
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"github.com/TeaOSLab/EdgeNode/internal/ttlcache"
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"github.com/TeaOSLab/EdgeNode/internal/utils"
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"github.com/TeaOSLab/EdgeNode/internal/waf/requests"
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"github.com/dchest/captcha"
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"github.com/iwind/TeaGo/logs"
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"github.com/iwind/TeaGo/types"
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"net/http"
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"strconv"
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"strings"
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"time"
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)
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var captchaValidator = NewCaptchaValidator()
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type CaptchaValidator struct {
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}
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func NewCaptchaValidator() *CaptchaValidator {
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return &CaptchaValidator{}
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}
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func (this *CaptchaValidator) Run(req requests.Request, writer http.ResponseWriter) {
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var info = req.WAFRaw().URL.Query().Get("info")
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if len(info) == 0 {
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writer.WriteHeader(http.StatusBadRequest)
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_, _ = writer.Write([]byte("invalid request"))
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return
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}
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m, err := utils.SimpleDecryptMap(info)
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if err != nil {
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_, _ = writer.Write([]byte("invalid request"))
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return
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}
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var timestamp = m.GetInt64("timestamp")
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if timestamp < time.Now().Unix()-600 { // 10分钟之后信息过期
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http.Redirect(writer, req.WAFRaw(), m.GetString("url"), http.StatusTemporaryRedirect)
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return
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}
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var actionId = m.GetInt64("actionId")
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var setId = m.GetInt64("setId")
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var originURL = m.GetString("url")
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var policyId = m.GetInt64("policyId")
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var groupId = m.GetInt64("groupId")
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var waf = SharedWAFManager.FindWAF(policyId)
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if waf == nil {
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http.Redirect(writer, req.WAFRaw(), originURL, http.StatusTemporaryRedirect)
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return
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}
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var actionConfig = waf.FindAction(actionId)
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if actionConfig == nil {
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http.Redirect(writer, req.WAFRaw(), originURL, http.StatusTemporaryRedirect)
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return
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}
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captchaActionConfig, ok := actionConfig.(*CaptchaAction)
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if !ok {
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http.Redirect(writer, req.WAFRaw(), originURL, http.StatusTemporaryRedirect)
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return
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}
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if req.WAFRaw().Method == http.MethodPost && len(req.WAFRaw().FormValue("GOEDGE_WAF_CAPTCHA_ID")) > 0 {
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this.validate(captchaActionConfig, policyId, groupId, setId, originURL, req, writer)
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} else {
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// 增加计数
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this.IncreaseFails(req, captchaActionConfig, policyId, groupId, setId)
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this.show(captchaActionConfig, req, writer)
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}
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}
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func (this *CaptchaValidator) show(actionConfig *CaptchaAction, req requests.Request, writer http.ResponseWriter) {
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// show captcha
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var countLetters = 6
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if actionConfig.CountLetters > 0 && actionConfig.CountLetters <= 10 {
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countLetters = int(actionConfig.CountLetters)
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}
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var captchaId = captcha.NewLen(countLetters)
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var buf = bytes.NewBuffer([]byte{})
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err := captcha.WriteImage(buf, captchaId, 200, 100)
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if err != nil {
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logs.Error(err)
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return
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}
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var lang = actionConfig.Lang
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if len(lang) == 0 {
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var acceptLanguage = req.WAFRaw().Header.Get("Accept-Language")
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if len(acceptLanguage) > 0 {
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langIndex := strings.Index(acceptLanguage, ",")
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if langIndex > 0 {
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lang = acceptLanguage[:langIndex]
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}
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}
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}
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if len(lang) == 0 {
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lang = "en-US"
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}
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var msgTitle = ""
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var msgPrompt = ""
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var msgButtonTitle = ""
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var msgRequestId = ""
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switch lang {
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case "en-US":
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msgTitle = "Verify Yourself"
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msgPrompt = "Input verify code above:"
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msgButtonTitle = "Verify Yourself"
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msgRequestId = "Request ID"
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case "zh-CN":
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msgTitle = "身份验证"
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msgPrompt = "请输入上面的验证码"
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msgButtonTitle = "提交验证"
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msgRequestId = "请求ID"
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default:
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msgTitle = "Verify Yourself"
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msgPrompt = "Input verify code above:"
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msgButtonTitle = "Verify Yourself"
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msgRequestId = "Request ID"
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}
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var msgCss = ""
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var requestIdBox = `<address>` + msgRequestId + `: ` + req.Format("${requestId}") + `</address>`
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var msgFooter = ""
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var body = `<form method="POST">
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<input type="hidden" name="GOEDGE_WAF_CAPTCHA_ID" value="` + captchaId + `"/>
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<div class="ui-image">
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<img src="data:image/png;base64, ` + base64.StdEncoding.EncodeToString(buf.Bytes()) + `"/>` + `
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</div>
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<div class="ui-input">
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<p>` + msgPrompt + `</p>
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<input type="text" name="GOEDGE_WAF_CAPTCHA_CODE" id="GOEDGE_WAF_CAPTCHA_CODE" maxlength="6" autocomplete="off" z-index="1" class="input"/>
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</div>
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<div class="ui-button">
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<button type="submit" style="line-height:24px;margin-top:10px">` + msgButtonTitle + `</button>
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</div>
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</form>
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` + requestIdBox + `
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` + msgFooter + ``
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// 默认设置
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if actionConfig.UIIsOn {
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if len(actionConfig.UITitle) > 0 {
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msgTitle = actionConfig.UITitle
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}
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if len(actionConfig.UIPrompt) > 0 {
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msgPrompt = actionConfig.UIPrompt
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}
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if len(actionConfig.UIButtonTitle) > 0 {
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msgButtonTitle = actionConfig.UIButtonTitle
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}
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if len(actionConfig.UICss) > 0 {
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msgCss = actionConfig.UICss
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}
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if !actionConfig.UIShowRequestId {
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requestIdBox = ""
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}
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if len(actionConfig.UIFooter) > 0 {
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msgFooter = actionConfig.UIFooter
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}
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if len(actionConfig.UIBody) > 0 {
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var index = strings.Index(actionConfig.UIBody, "${body}")
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if index < 0 {
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body = actionConfig.UIBody + body
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} else {
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body = actionConfig.UIBody[:index] + body + actionConfig.UIBody[index+7:] // 7是"${body}"的长度
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}
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}
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}
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writer.Header().Set("Content-Type", "text/html; charset=utf-8")
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_, _ = writer.Write([]byte(`<!DOCTYPE html>
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<html>
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<head>
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<title>` + msgTitle + `</title>
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<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0">
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<meta charset="UTF-8"/>
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<script type="text/javascript">
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if (window.addEventListener != null) {
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window.addEventListener("load", function () {
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document.getElementById("GOEDGE_WAF_CAPTCHA_CODE").focus()
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})
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}
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</script>
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<style type="text/css">
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form { width: 20em; margin: 0 auto; text-align: center; }
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.input { font-size:16px;line-height:24px; letter-spacing: 15px; padding-left: 10px; width: 140px; }
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address { margin-top: 1em; padding-top: 0.5em; border-top: 1px #ccc solid; text-align: center; }
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` + msgCss + `
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</style>
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</head>
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<body>` + body + `
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</body>
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</html>`))
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}
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func (this *CaptchaValidator) validate(actionConfig *CaptchaAction, policyId int64, groupId int64, setId int64, originURL string, req requests.Request, writer http.ResponseWriter) (allow bool) {
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var captchaId = req.WAFRaw().FormValue("GOEDGE_WAF_CAPTCHA_ID")
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if len(captchaId) > 0 {
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var captchaCode = req.WAFRaw().FormValue("GOEDGE_WAF_CAPTCHA_CODE")
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if captcha.VerifyString(captchaId, captchaCode) {
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// 清除计数
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ttlcache.SharedCache.Delete(this.cacheKey(req))
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var life = CaptchaSeconds
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if actionConfig.Life > 0 {
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life = types.Int(actionConfig.Life)
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}
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// 加入到白名单
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SharedIPWhiteList.RecordIP("set:"+strconv.FormatInt(setId, 10), actionConfig.Scope, req.WAFServerId(), req.WAFRemoteIP(), time.Now().Unix()+int64(life), policyId, false, groupId, setId, "")
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http.Redirect(writer, req.WAFRaw(), originURL, http.StatusSeeOther)
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return false
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} else {
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// 增加计数
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if !this.IncreaseFails(req, actionConfig, policyId, groupId, setId) {
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return false
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}
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http.Redirect(writer, req.WAFRaw(), req.WAFRaw().URL.String(), http.StatusSeeOther)
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}
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}
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return true
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}
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// IncreaseFails 增加失败次数，以便后续操作
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func (this *CaptchaValidator) IncreaseFails(req requests.Request, actionConfig *CaptchaAction, policyId int64, groupId int64, setId int64) (goNext bool) {
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var maxFails = actionConfig.MaxFails
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var failBlockTimeout = actionConfig.FailBlockTimeout
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if maxFails > 0 && failBlockTimeout > 0 {
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// 加上展示的计数
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maxFails *= 2
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var countFails = ttlcache.SharedCache.IncreaseInt64(this.cacheKey(req), 1, time.Now().Unix()+300, true)
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if int(countFails) >= maxFails {
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var useLocalFirewall = false
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if actionConfig.FailBlockScopeAll {
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useLocalFirewall = true
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}
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SharedIPBlackList.RecordIP(IPTypeAll, firewallconfigs.FirewallScopeService, req.WAFServerId(), req.WAFRemoteIP(), time.Now().Unix()+int64(failBlockTimeout), policyId, useLocalFirewall, groupId, setId, "CAPTCHA验证连续失败")
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return false
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}
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}
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return true
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}
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func (this *CaptchaValidator) cacheKey(req requests.Request) string {
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return "CAPTCHA:FAILS:" + req.WAFRemoteIP() + ":" + types.String(req.WAFServerId())
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}
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