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guard_dynamic.lua
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guard_dynamic.lua
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local Guard = {}
--debug日志
function Guard:debug(data, ip, reqUri)
local isOn = _Conf.dict_system:get("debug_state")
if isOn then
local date = os.date("%Y-%m-%d")
local filename = _Conf.logPath .. "/debug-" .. date .. ".log"
local file = io.open(filename, "a+")
file:write(os.date('%Y-%m-%d %H:%M:%S') .. " [DEBUG] " .. data .. " IP " .. ip .. " GET " .. reqUri .. "\n")
file:close()
end
end
--攻击日志
function Guard:log(data)
local date = os.date("%Y-%m-%d")
local filename = _Conf.logPath .. "/attack-" .. date .. ".log"
local file = io.open(filename, "a+")
file:write(os.date('%Y-%m-%d %H:%M:%S') .. " [WARNING] " .. data .. "\n")
file:close()
end
--获取真实ip
function Guard:getRealIp(remoteIp, headers)
if _Conf.realIpFromHeaderIsOn then
realIp = headers[_Conf.realIpFromHeader.header]
if realIp then
--self:debug(type(realIp).."[==========>] realIpFromHeader is on.return ip "..realIp,remoteIp,"")
--realIp 类型一般为 string
if type(realIp) == "table" then
realIp = realIp[1]
end
--X-Forwarded-For:用户IP, 代理服务器1-IP, 代理服务器2-IP, 代理服务器3-IP, ……
--获取用户IP
local regex = [[\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}]]
--local regex = "[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}"
local m = ngx.re.match(realIp, regex, "ijo") or false
if m then
realIp = m[0]
else
--get realIp fail, set default ip 0.0.0.7
realIp = "0.0.0.7"
end
--self:debug(realIp.."[==========>] realIpFromHeader is on.return ip "..realIp,remoteIp,"")
self:debug("[getRealIp] realIpFromHeader is on.return ip " .. realIp, remoteIp, "")
return realIp
else
return remoteIp
end
else
return remoteIp
end
end
--byWhite白名单模块
function Guard:ipInByWhiteList(ip)
local isOn = _Conf.dict_system:get("byWhiteIpModules_state")
if isOn then
--判断是否开启白名单模块
--self:debug("[ipInByWhiteList] byWhiteIpModules is on.",ip,"")
if _Conf.dict_byWhiteIp:get(ip) then
self:debug("[ipInByWhiteList] ip " .. ip .. " in byWhite list", ip, "")
return true
else
return false
end
end
return false
end
--byDeny黑名单模块
function Guard:ipInByDenyList(ip)
local isOn = _Conf.dict_system:get("byDenyIpModules_state")
if isOn then
--判断是否开启 byDeny 黑名单模块
--self:debug("[ipInByDenyList] byDenyIpModules is on.",ip,"")
if _Conf.dict_byDenyIp:get(ip) then
self:debug("[ipInByDenyList] ip " .. ip .. " in byDeny list ", ip, "")
return true
else
return false
end
end
return false
end
--黑名单模块
function Guard:blackListModules(ip, reqUri, address, userAgent, httpReferer)
local blackKey = ip .. "black"
if _Conf.dict_black:get(blackKey) then
--判断ip是否存在黑名单字典
self:debug("[blackListModules] ip " .. ip .. " in blacklist", ip, reqUri)
self:takeAction(ip, reqUri, address, userAgent, httpReferer) --存在则执行相应动作
end
end
--限制请求速率模块
function Guard:limitReqModules(ip, reqUri, address, limitModule)
local isOn = _Conf.dict_system:get("limitReqModules_state")
if (isOn and not (limitModule == "off")) or (limitModule == "on") then
local maxReqs = _Conf.dict_system:get("limitReqModules_maxReqs")
local limitUrlProtect = _Conf.dict_system:get("limitUrlProtect")
if ngx.re.match(address, limitUrlProtect, "i") then
self:debug("[limitReqModules] address " .. address .. " match reg " .. limitUrlProtect, ip, reqUri)
local blackKey = ip .. "black"
local limitReqKey = ip .. "limitreqkey" --定义limitreq key
local reqTimes = _Conf.dict_challenge:get(limitReqKey) --获取此ip请求的次数
--增加一次请求记录
if reqTimes then
_Conf.dict_challenge:incr(limitReqKey, 1)
else
local amongTime = _Conf.dict_system:get("limitReqModules_amongTime")
_Conf.dict_challenge:set(limitReqKey, 1, amongTime)
reqTimes = 0
end
local newReqTimes = reqTimes + 1
self:debug("[limitReqModules] newReqTimes " .. newReqTimes, ip, reqUri)
--判断请求数是否大于阀值,大于则添加黑名单
if newReqTimes > maxReqs then
--判断是否请求数大于阀值
self:debug("[limitReqModules] ip " .. ip .. " request exceed " .. maxReqs, ip, reqUri)
local blockTime = _Conf.dict_system:get("blockTime")
if _Conf.limitReqModules.action == 1 then
--添加此ip到黑名单
local blackKey = ip .. "black"
_Conf.dict_black:set(blackKey, 0, blockTime)
self:log("[limitReqModules] IP " .. ip .. " request " .. newReqTimes .. " times, add it to black list")
elseif _Conf.limitReqModules.action == 2 then
--添加此ip到needVerify列表
_Conf.dict_needVerify:set(ip, "limitReqModules", blockTime)
self:log("[limitReqModules] IP " .. ip .. " request " .. newReqTimes .. " times, add it to needVerify list")
elseif _Conf.limitReqModules.action == 3 then
--添加此ip到byDenyIp列表
_Conf.dict_byDenyIp:set(ip, "limitReqModules", blockTime)
self:log("[limitReqModules] IP " .. ip .. " request " .. newReqTimes .. " times, add it to byDenyIp list")
end
end
end
end
end
--302转向模块
function Guard:redirectModules(ip, reqUri, address)
local redirectUrlProtect = _Conf.dict_system:get("redirectUrlProtect")
if ngx.re.match(address, redirectUrlProtect, "ijo") then
self:debug("[redirectModules] address " .. address .. " match reg " .. redirectUrlProtect, ip, reqUri)
local whiteTime = _Conf.dict_system:get("whiteTime")
local blockTime = _Conf.dict_system:get("blockTime")
local keyExpire = _Conf.dict_system:get("keyExpire")
local verifyMaxFail = _Conf.dict_system:get("redirectModules_verifyMaxFail")
local amongTime = _Conf.dict_system:get("redirectModules_amongTime")
local whiteKey = ip .. "white302"
local inWhiteList = _Conf.dict_white:get(whiteKey)
if inWhiteList then
--如果在白名单
self:debug("[redirectModules] in white ip list", ip, reqUri)
return
else
--如果不在白名单,再检测是否有cookie凭证
local now = ngx.time() --当前时间戳
local challengeTimesKey = table.concat({ ip, "challenge302" })
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
local blackKey = ip .. "black"
local cookie_key = ngx.var["cookie_key302"] --获取cookie密钥
local cookie_expire = ngx.var["cookie_expire302"] --获取cookie密钥过期时间
if cookie_key and cookie_expire then
local key_make = ngx.md5(table.concat({ ip, _Conf.redirectModules.keySecret, cookie_expire }))
local key_make = string.sub(key_make, "1", "10")
--判断cookie是否有效
if tonumber(cookie_expire) > now and cookie_key == key_make then
self:debug("[redirectModules] cookie key is valid.", ip, reqUri)
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除验证失败计数器
end
_Conf.dict_white:set(whiteKey, 0, whiteTime) --添加到白名单
if _Conf.dict_black:get(blackKey) then
--如果黑名单中有该IP, 则删除
_Conf.dict_black:delete(blackKey)
end
return
else
self:debug("[redirectModules] cookie key is invalid.", ip, reqUri)
local expire = now + keyExpire
local key_new = ngx.md5(table.concat({ ip, _Conf.redirectModules.keySecret, expire }))
local key_new = string.sub(key_new, "1", "10")
--定义转向的url
local newUrl = ''
local newReqUri = ngx.re.match(reqUri, "(.*?)\\?(.+)")
if newReqUri then
local reqUriNoneArgs = newReqUri[1]
local args = newReqUri[2]
--删除cckey和keyexpire
local newArgs = ngx.re.gsub(args, "[&?]?key302=[^&]+&?|expire302=[^&]+&?", "", "i")
if newArgs == "" then
newUrl = table.concat({ reqUriNoneArgs, "?key302=", key_new, "&expire302=", expire })
else
newUrl = table.concat({ reqUriNoneArgs, "?", newArgs, "&key302=", key_new, "&expire302=", expire })
end
else
newUrl = table.concat({ reqUri, "?key302=", key_new, "&expire302=", expire })
end
--验证失败次数加1
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
if challengeTimesValue + 1 > verifyMaxFail then
self:debug("[redirectModules] client " .. ip .. " challenge cookie failed " .. challengeTimesValue .. " times,add to blacklist.", ip, reqUri)
self:log("[redirectModules] client " .. ip .. " challenge cookie failed " .. challengeTimesValue .. " times,add to blacklist.")
_Conf.dict_black:set(blackKey, 0, blockTime) --添加此ip到黑名单
self:black2byDeny(ip, reqUri, address) --判断是否要添加该IP到byDenyIp名单
end
else
_Conf.dict_challenge:set(challengeTimesKey, 1, amongTime)
end
--删除cookie
ngx.header['Set-Cookie'] = { "key302=; path=/", "expire302=; expires=Sat, 01-Jan-2000 00:00:00 GMT; path=/" }
return ngx.redirect(newUrl, 302) --发送302转向
end
else
--如果没有找到cookie,则检测是否带cckey参数
local ccKeyValue = ngx.re.match(reqUri, "key302=([^&]+)", "i")
local expire = ngx.re.match(reqUri, "expire302=([^&]+)", "i")
if ccKeyValue and expire then
--是否有cckey和keyexpire参数
local ccKeyValue = ccKeyValue[1]
local expire = expire[1]
local key_make = ngx.md5(table.concat({ ip, _Conf.redirectModules.keySecret, expire }))
local key_make = string.sub(key_make, "1", "10")
self:debug("[redirectModules] ccKeyValue " .. ccKeyValue, ip, reqUri)
self:debug("[redirectModules] expire " .. expire, ip, reqUri)
self:debug("[redirectModules] key_make " .. key_make, ip, reqUri)
self:debug("[redirectModules] ccKeyValue " .. ccKeyValue, ip, reqUri)
if key_make == ccKeyValue and now < tonumber(expire) then
--判断传过来的cckey参数值是否等于字典记录的值,且没有过期
self:debug("[redirectModules] ip " .. ip .. " arg key302 " .. ccKeyValue .. " is valid.add ip to write list.", ip, reqUri)
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除验证失败计数器
end
_Conf.dict_white:set(whiteKey, 0, whiteTime) --添加到白名单
if _Conf.dict_black:get(blackKey) then
--如果黑名单中有该IP, 则删除
_Conf.dict_black:delete(blackKey)
end
ngx.header['Set-Cookie'] = { "key302=" .. key_make .. "; path=/", "expire302=" .. expire .. "; path=/" } --发送cookie凭证
return
else
--如果不相等，则再发送302转向
self:debug("[redirectModules] ip " .. ip .. " arg key302 is invalid.", ip, reqUri)
local expire = now + keyExpire
local key_new = ngx.md5(table.concat({ ip, _Conf.redirectModules.keySecret, expire }))
local key_new = string.sub(key_new, "1", "10")
--验证失败次数加1
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
if challengeTimesValue + 1 > verifyMaxFail then
self:debug("[redirectModules] client " .. ip .. " challenge 302key failed " .. challengeTimesValue .. " times,add to blacklist.", ip, reqUri)
self:log("[redirectModules] client " .. ip .. " challenge 302key failed " .. challengeTimesValue .. " times,add to blacklist.")
_Conf.dict_black:set(blackKey, 0, blockTime) --添加此ip到黑名单
self:black2byDeny(ip, reqUri, address) --判断是否要添加该IP到byDenyIp名单
end
else
_Conf.dict_challenge:set(challengeTimesKey, 1, amongTime)
end
--定义转向的url
local newUrl = ''
local newReqUri = ngx.re.match(reqUri, "(.*?)\\?(.+)")
if newReqUri then
local reqUriNoneArgs = newReqUri[1]
local args = newReqUri[2]
--删除cckey和keyexpire
local newArgs = ngx.re.gsub(args, "[&?]?key302=[^&]+&?|expire302=[^&]+&?", "", "i")
if newArgs == "" then
newUrl = table.concat({ reqUriNoneArgs, "?key302=", key_new, "&expire302=", expire })
else
newUrl = table.concat({ reqUriNoneArgs, "?", newArgs, "&key302=", key_new, "&expire302=", expire })
end
else
newUrl = table.concat({ reqUri, "?key302=", key_new, "&expire302=", expire })
end
return ngx.redirect(newUrl, 302) --发送302转向
end
else
--验证失败次数加1
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
if challengeTimesValue + 1 > verifyMaxFail then
self:debug("[redirectModules] client " .. ip .. " challenge 302key failed " .. challengeTimesValue .. " times,add to blacklist.", ip, reqUri)
self:log("[redirectModules] client " .. ip .. " challenge 302key failed " .. challengeTimesValue .. " times,add to blacklist.")
_Conf.dict_black:set(blackKey, 0, blockTime) --添加此ip到黑名单
self:black2byDeny(ip, reqUri, address) --判断是否要添加该IP到byDenyIp名单
end
else
_Conf.dict_challenge:set(challengeTimesKey, 1, amongTime)
end
local expire = now + keyExpire
local key_new = ngx.md5(table.concat({ ip, _Conf.redirectModules.keySecret, expire }))
local key_new = string.sub(key_new, "1", "10")
--定义转向的url
local newUrl = ''
local newReqUri = ngx.re.match(reqUri, "(.*?)\\?(.+)")
if newReqUri then
local reqUriNoneArgs = newReqUri[1]
local args = newReqUri[2]
--删除cckey和keyexpire
local newArgs = ngx.re.gsub(args, "[&?]?key302=[^&]+&?|expire302=[^&]+&?", "", "i")
if newArgs == "" then
newUrl = table.concat({ reqUriNoneArgs, "?key302=", key_new, "&expire302=", expire })
else
newUrl = table.concat({ reqUriNoneArgs, "?", newArgs, "&key302=", key_new, "&expire302=", expire })
end
else
newUrl = table.concat({ reqUri, "?key302=", key_new, "&expire302=", expire })
end
return ngx.redirect(newUrl, 302) --发送302转向
end
end
end
end
end
--js跳转模块
function Guard:JsJumpModules(ip, reqUri, address)
local JsJumpUrlProtect = _Conf.dict_system:get("JsJumpUrlProtect")
if ngx.re.match(address, JsJumpUrlProtect, "ijo") then
self:debug("[JsJumpModules] address " .. address .. " match reg " .. JsJumpUrlProtect, ip, reqUri)
local whiteTime = _Conf.dict_system:get("whiteTime")
local blockTime = _Conf.dict_system:get("blockTime")
local keyExpire = _Conf.dict_system:get("keyExpire")
local verifyMaxFail = _Conf.dict_system:get("JsJumpModules_verifyMaxFail")
local amongTime = _Conf.dict_system:get("JsJumpModules_amongTime")
local whiteKey = ip .. "whitejs"
local inWhiteList = _Conf.dict_white:get(whiteKey)
if inWhiteList then
--如果在白名单
self:debug("[JsJumpModules] in white ip list", ip, reqUri)
return
else
--如果不在白名单,检测是否有cookie凭证
local cookie_key = ngx.var["cookie_keyjs"] --获取cookie密钥
local cookie_expire = ngx.var["cookie_expirejs"] --获取cookie密钥过期时间
local now = ngx.time() --当前时间戳
local challengeTimesKey = table.concat({ ip, "challengejs" })
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
local blackKey = ip .. "black"
local cookie_key = ngx.var["cookie_keyjs"] --获取cookie密钥
local cookie_expire = ngx.var["cookie_expirejs"] --获取cookie密钥过期时间
if cookie_key and cookie_expire then
local key_make = ngx.md5(table.concat({ ip, _Conf.JsJumpModules.keySecret, cookie_expire }))
local key_make = string.sub(key_make, "1", "10")
if tonumber(cookie_expire) > now and cookie_key == key_make then
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除验证失败计数器
end
self:debug("[JsJumpModules] cookie key is valid.", ip, reqUri)
_Conf.dict_white:set(whiteKey, 0, whiteTime) --添加ip到白名单
if _Conf.dict_black:get(blackKey) then
--如果黑名单中有该IP, 则删除
_Conf.dict_black:delete(blackKey)
end
return
else
--验证失败次数加1
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
if challengeTimesValue + 1 > verifyMaxFail then
self:debug("[JsJumpModules] client " .. ip .. " challenge cookie failed " .. challengeTimesValue .. " times,add to blacklist.", ip, reqUri)
self:log("[JsJumpModules] client " .. ip .. " challenge cookie failed " .. challengeTimesValue .. " times,add to blacklist.")
_Conf.dict_black:set(blackKey, 0, blockTime) --添加此ip到黑名单
self:black2byDeny(ip, reqUri, address) --判断是否要添加该IP到byDenyIp名单
end
else
_Conf.dict_challenge:set(challengeTimesKey, 1, amongTime)
end
self:debug("[JsJumpModules] cookie key is invalid.", ip, reqUri)
local expire = now + keyExpire
local key_new = ngx.md5(table.concat({ ip, _Conf.JsJumpModules.keySecret, expire }))
local key_new = string.sub(key_new, "1", "10")
--定义转向的url
local newUrl = ''
local newReqUri = ngx.re.match(reqUri, "(.*?)\\?(.+)")
if newReqUri then
local reqUriNoneArgs = newReqUri[1]
local args = newReqUri[2]
--删除cckey和keyexpire
local newArgs = ngx.re.gsub(args, "[&?]?keyjs=[^&]+&?|expirejs=[^&]+&?", "", "i")
if newArgs == "" then
newUrl = table.concat({ reqUriNoneArgs, "?keyjs=", key_new, "&expirejs=", expire })
else
newUrl = table.concat({ reqUriNoneArgs, "?", newArgs, "&keyjs=", key_new, "&expirejs=", expire })
end
else
newUrl = table.concat({ reqUri, "?keyjs=", key_new, "&expirejs=", expire })
end
local jsJumpCode = table.concat({ "<script>window.location.href='", newUrl, "';</script>" }) --定义js跳转代码
ngx.header.content_type = "text/html"
--删除cookie
ngx.header['Set-Cookie'] = { "keyjs=; path=/", "expirejs=; expires=Sat, 01-Jan-2000 00:00:00 GMT; path=/" }
ngx.print(jsJumpCode)
ngx.exit(200)
end
else
--如果没有cookie凭证,检测url是否带有cckey参数
local ccKeyValue = ngx.re.match(reqUri, "keyjs=([^&]+)", "i")
local expire = ngx.re.match(reqUri, "expirejs=([^&]+)", "i")
if ccKeyValue and expire then
local ccKeyValue = ccKeyValue[1]
local expire = expire[1]
local key_make = ngx.md5(table.concat({ ip, _Conf.JsJumpModules.keySecret, expire }))
local key_make = string.sub(key_make, "1", "10")
if key_make == ccKeyValue and now < tonumber(expire) then
--判断传过来的cckey参数值是否等于字典记录的值,且没有过期
self:debug("[JsJumpModules] ip " .. ip .. " arg keyjs " .. ccKeyValue .. " is valid.add ip to white list.", ip, reqUri)
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除验证失败计数器
end
_Conf.dict_white:set(whiteKey, 0, whiteTime) --添加ip到白名单
if _Conf.dict_black:get(blackKey) then
--如果黑名单中有该IP, 则删除
_Conf.dict_black:delete(blackKey)
end
ngx.header['Set-Cookie'] = { "keyjs=" .. key_make .. "; path=/", "expirejs=" .. expire .. "; path=/" } --发送cookie凭证
return
else
--如果不相等，则再发送302转向
--验证失败次数加1
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
if challengeTimesValue + 1 > verifyMaxFail then
self:debug("[JsJumpModules] client " .. ip .. " challenge jskey failed " .. challengeTimesValue .. " times,add to blacklist.", ip, reqUri)
self:log("[JsJumpModules] client " .. ip .. " challenge jskey failed " .. challengeTimesValue .. " times,add to blacklist.")
_Conf.dict_black:set(blackKey, 0, blockTime) --添加此ip到黑名单
self:black2byDeny(ip, reqUri, address) --判断是否要添加该IP到byDenyIp名单
end
else
_Conf.dict_challenge:set(challengeTimesKey, 1, amongTime)
end
self:debug("[JsJumpModules] ip " .. ip .. " arg keyjs is invalid.", ip, reqUri)
local expire = now + keyExpire
local key_new = ngx.md5(table.concat({ ip, _Conf.JsJumpModules.keySecret, expire }))
local key_new = string.sub(key_new, "1", "10")
--定义转向的url
local newUrl = ''
local newReqUri = ngx.re.match(reqUri, "(.*?)\\?(.+)")
if newReqUri then
local reqUriNoneArgs = newReqUri[1]
local args = newReqUri[2]
--删除cckey和keyexpire
local newArgs = ngx.re.gsub(args, "[&?]?keyjs=[^&]+&?|expirejs=[^&]+&?", "", "i")
if newArgs == "" then
newUrl = table.concat({ reqUriNoneArgs, "?keyjs=", key_new, "&expirejs=", expire })
else
newUrl = table.concat({ reqUriNoneArgs, "?", newArgs, "&keyjs=", key_new, "&expirejs=", expire })
end
else
newUrl = table.concat({ reqUri, "?keyjs=", key_new, "&expirejs=", expire })
end
local jsJumpCode = table.concat({ "<script>window.location.href='", newUrl, "';</script>" }) --定义js跳转代码
ngx.header.content_type = "text/html"
ngx.print(jsJumpCode)
ngx.exit(200)
end
else
--验证失败次数加1
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
if challengeTimesValue + 1 > verifyMaxFail then
self:debug("[JsJumpModules] client " .. ip .. " challenge jskey failed " .. challengeTimesValue .. " times,add to blacklist.", ip, reqUri)
self:log("[JsJumpModules] client " .. ip .. " challenge jskey failed " .. challengeTimesValue .. " times,add to blacklist.")
_Conf.dict_black:set(blackKey, 0, blockTime) --添加此ip到黑名单
self:black2byDeny(ip, reqUri, address) --判断是否要添加该IP到byDenyIp名单
end
else
_Conf.dict_challenge:set(challengeTimesKey, 1, amongTime)
end
--定义转向的url
local expire = now + keyExpire
local key_new = ngx.md5(table.concat({ ip, _Conf.JsJumpModules.keySecret, expire }))
local key_new = string.sub(key_new, "1", "10")
--定义转向的url
local newUrl = ''
local newReqUri = ngx.re.match(reqUri, "(.*?)\\?(.+)")
if newReqUri then
local reqUriNoneArgs = newReqUri[1]
local args = newReqUri[2]
--删除cckey和keyexpire
local newArgs = ngx.re.gsub(args, "[&?]?keyjs=[^&]+&?|expirejs=[^&]+&?", "", "i")
if newArgs == "" then
newUrl = table.concat({ reqUriNoneArgs, "?keyjs=", key_new, "&expirejs=", expire })
else
newUrl = table.concat({ reqUriNoneArgs, "?", newArgs, "&keyjs=", key_new, "&expirejs=", expire })
end
else
newUrl = table.concat({ reqUri, "?keyjs=", key_new, "&expirejs=", expire })
end
local jsJumpCode = table.concat({ "<script>window.location.href='", newUrl, "';</script>" }) --定义js跳转代码
ngx.header.content_type = "text/html"
ngx.print(jsJumpCode)
ngx.exit(200)
end
end
end
end
end
--cookie验证模块
function Guard:cookieModules(ip, reqUri, address, userAgent, httpReferer)
local cookieUrlProtect = _Conf.dict_system:get("cookieUrlProtect")
if ngx.re.match(address, cookieUrlProtect, "ijo") then
self:debug("[cookieModules] address " .. address .. " match reg " .. cookieUrlProtect .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
local whiteTime = _Conf.dict_system:get("whiteTime")
local blockTime = _Conf.dict_system:get("blockTime")
local keyExpire = _Conf.dict_system:get("keyExpire")
local verifyMaxFail = _Conf.dict_system:get("cookieModules_verifyMaxFail")
local amongTime = _Conf.dict_system:get("cookieModules_amongTime")
local whiteKey = ip .. "whitecookie"
local inWhiteList = _Conf.dict_white:get(whiteKey)
if inWhiteList then
--如果在白名单
self:debug("[cookieModules] in white ip list." .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
return
else
local cookie_key = ngx.var["cookie_keycookie"] --获取cookie密钥
local cookie_expire = ngx.var["cookie_expirecookie"] --获取cookie密钥过期时间
local now = ngx.time() --当前时间戳
local challengeTimesKey = table.concat({ ip, "challengecookie" })
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
local blackKey = ip .. "black"
if cookie_key and cookie_expire then
--判断是否有收到cookie
local key_make = ngx.md5(table.concat({ ip, _Conf.cookieModules.keySecret, cookie_expire }))
local key_make = string.sub(key_make, "1", "10")
if tonumber(cookie_expire) > now and cookie_key == key_make then
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除验证失败计数器
end
self:debug("[cookieModules] cookie key is valid.add to white ip list" .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
_Conf.dict_white:set(whiteKey, 0, whiteTime) --添加ip到白名单
if _Conf.dict_black:get(blackKey) then
--如果黑名单中有该IP, 则删除
_Conf.dict_black:delete(blackKey)
end
return
else
self:debug("[cookieModules] cookie key is invalid" .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
--验证失败次数加1
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
if challengeTimesValue + 1 > verifyMaxFail then
self:debug("[cookieModules] client " .. ip .. " challenge cookie failed " .. challengeTimesValue .. " times,add to blacklist." .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
self:log("[cookieModules] client " .. ip .. " challenge cookie failed " .. challengeTimesValue .. " times,add to blacklist.")
_Conf.dict_black:set(blackKey, 0, blockTime) --添加此ip到黑名单
self:black2byDeny(ip, reqUri, address) --判断是否要添加该IP到byDenyIp名单
end
else
_Conf.dict_challenge:set(challengeTimesKey, 1, amongTime)
end
ngx.header['Set-Cookie'] = { "keycookie=; path=/", "expirecookie=; expires=Sat, 01-Jan-2000 00:00:00 GMT; path=/" } --删除cookie
end
else
--找不到cookie
self:debug("[cookieModules] cookie not found." .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
--验证失败次数加1
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
if challengeTimesValue + 1 > verifyMaxFail then
self:debug("[cookieModules] client " .. ip .. " challenge cookie failed " .. challengeTimesValue .. " times,add to blacklist." .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
self:log("[cookieModules] client " .. ip .. " challenge cookie failed " .. challengeTimesValue .. " times,add to blacklist.")
_Conf.dict_black:set(blackKey, 0, blockTime) --添加此ip到黑名单
self:black2byDeny(ip, reqUri, address) --判断是否要添加该IP到byDenyIp名单
end
else
_Conf.dict_challenge:set(challengeTimesKey, 1, amongTime)
end
local expire = now + keyExpire
local key_new = ngx.md5(table.concat({ ip, _Conf.cookieModules.keySecret, expire }))
local key_new = string.sub(key_new, "1", "10")
self:debug("[cookieModules] send cookie to client." .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
ngx.header['Set-Cookie'] = { "keycookie=" .. key_new .. "; path=/", "expirecookie=" .. expire .. "; path=/" } --发送cookie凭证
end
end
end
end
--获取验证码
function Guard:getCaptcha()
--local random = math.random(1,10000) --生成1-10000之间的随机数
local random = math.random(_Conf.randomInteger, (_Conf.randomInteger + 10000)) --生成一个随机数
self:debug("[getCaptcha] get random num " .. random, "", "")
local captchaValue = _Conf.dict_captcha:get(random) --取得字典中的验证码
self:debug("[getCaptcha] get captchaValue " .. captchaValue, "", "")
local captchaImg = _Conf.dict_captcha:get(captchaValue) --取得验证码对应的图片
--返回图片
ngx.status = 298
ngx.header.content_type = "image/jpeg"
ngx.header['Set-Cookie'] = table.concat({ "captchaNum=", random, "; path=/" })
ngx.header['Cache-Control'] = "no-cache"
ngx.print(captchaImg)
ngx.exit(298)
end
--验证验证码
function Guard:verifyCaptcha(ip, reqUri, address)
ngx.req.read_body()
local captchaNum = ngx.var["cookie_captchaNum"] or "NONE" --获取cookie captchaNum值
local preurl = ngx.var["cookie_preurl"] or "/" --获取上次访问url,如果为空则返回首页(返回首页是为了避免用户禁用了 Cookie 而导致无法获取上次访问的URL)
self:debug("[verifyCaptcha] get cookie captchaNum " .. captchaNum, ip, "")
local args = ngx.req.get_post_args() --获取post参数
local postValue = args["response"] or "postValue_NONE" --获取post value参数
postValue = string.lower(postValue)
self:debug("[verifyCaptcha] get post arg response " .. postValue, ip, "")
local captchaValue = _Conf.dict_captcha:get(captchaNum) or "captchaValue_NONE" --从字典获取post value对应的验证码值
--preurl(若上次访问的URL) 中含verify-captcha.do, 则preurl 截到 verify-captcha.do
if ngx.re.match(preurl, "verify-captcha.do", "i") then
local from, to, err = ngx.re.find(preurl, "verify-captcha.do", "i")
preurl = string.sub(preurl, 0, from - 1)
end
--preurl(若上次访问的URL为ico、js、css、图片等则返回preurl为首页)
if ngx.re.match(preurl, _Conf.preurlVerifyCaptcha_regex, "i") then
preurl = "/"
end
if captchaValue == postValue then
--比较验证码是否相等
_Conf.dict_black:delete(ip .. "black") --从黑名单删除
self:debug("[verifyCaptcha] captcha is valid.delete from blacklist", ip, "")
--清除perUrlRateLimit相关记录
self:perUrlRateLimitVerifyOK(ip, reqUri, address)
local oneKeyOpenVerificationOn = _Conf.dict_system:get("oneKeyOpenVerificationOn")
if oneKeyOpenVerificationOn == 1 then
--添加IP到白名单并删除challenge列表中验证失败计数器
local whiteTime = _Conf.dict_system:get("oneKeyOpenVerification_whiteTime")
_Conf.dict_white:set(ip .. "whiteVerification", 0, whiteTime)
return ngx.redirect(preurl)
else
if _Conf.redirectModulesIsOn then
_Conf.dict_white:set(ip .. "white302", 0, _Conf.whiteTime) --添加IP到白名单
local challengeTimesKey = table.concat({ ip, "challenge302" })
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除challenge列表中验证失败计数器
end
end
if _Conf.JsJumpModulesIsOn then
_Conf.dict_white:set(ip .. "whitejs", 0, _Conf.whiteTime)
local challengeTimesKey = table.concat({ ip, "challengejs" }) --添加IP到白名单
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除challenge列表中验证失败计数器
end
end
if _Conf.cookieModulesIsOn then
_Conf.dict_white:set(ip .. "whitecookie", 0, _Conf.whiteTime)
local challengeTimesKey = table.concat({ ip, "challengecookie" }) --添加IP到白名单
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除challenge列表中验证失败计数器
end
end
end
--local challengeTimesKey = table.concat({ip,"challengecookie"})
--local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
--if challengeTimesValue then
-- _Conf.dict_challenge:delete(challengeTimesKey) --删除challenge列表中验证失败计数器
--end
local expire = ngx.time() + _Conf.keyExpire
local captchaKey = ngx.md5(table.concat({ ip, _Conf.captchaKey, expire }))
local captchaKey = string.sub(captchaKey, "1", "10")
self:debug("[verifyCaptcha] expire " .. expire, ip, "")
self:debug("[verifyCaptcha] captchaKey " .. captchaKey, ip, "")
ngx.header['Set-Cookie'] = { "captchaKey=" .. captchaKey .. "; path=/", "captchaExpire=" .. expire .. "; path=/" }
return ngx.redirect(preurl) --返回上次访问url
else
if _Conf.captcha2clickOn and postValue then
--是否执行captcha2click
local challengeTimesKey = table.concat({ ip, "verifyFail" })
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
if challengeTimesValue then
_Conf.dict_challenge:incr(challengeTimesKey, 1)
--重新发送验证码页面)
self:reSendCaptch(ip)
else
_Conf.dict_challenge:set(challengeTimesKey, 1, _Conf.captcha2click.amongTime)
--重新发送验证码页面
self:reSendCaptch(ip)
end
else
--重新发送验证码页面
--self:debug("[verifyCaptcha] captcha invalid",ip,"")
self:reSendCaptch(ip)
end
end
end
function Guard:reSendCaptch(ip)
self:debug("[verifyCaptcha] captcha invalid", ip, "")
ngx.status = 298
ngx.header.content_type = "text/html"
ngx.header['Cache-Control'] = "no-cache"
ngx.print(_Conf.reCaptchaPage)
ngx.exit(298)
end
--拒绝访问动作
function Guard:forbiddenAction()
ngx.header.content_type = "text/html"
ngx.exit(299)
end
--展示验证码页面动作
function Guard:captchaAction(ip, reqUri, address)
local captcha2clickOn = _Conf.dict_system:get("captcha2click_state")
local verifyMaxFail = _Conf.dict_system:get("captcha2click_verifyMaxFail")
if captcha2clickOn then
--是否开启captcha2click,当 captcha验证失败 _Conf.captcha2click.verifyMaxFail 次后改用 click验证
local challengeTimesKey = table.concat({ ip, "verifyFail" })
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
if challengeTimesValue and (challengeTimesValue > verifyMaxFail) then
self:clickAction(ip, reqUri, address)
end
end
if ngx.re.match(reqUri, "^/get-captcha.do", "i") then
self:getCaptcha()
elseif ngx.re.match(reqUri, "^/verify-captcha.do", "i") then
self:verifyCaptcha(ip, reqUri, address)
else
ngx.status = 298
ngx.header.content_type = "text/html"
ngx.header['Set-Cookie'] = table.concat({ "preurl=", reqUri, "; path=/" })
ngx.header['Cache-Control'] = "no-cache"
ngx.print(_Conf.captchaPage)
ngx.exit(298)
end
end
--执行相应动作 (进入Black黑名单且不匹配 byPass 的都要验证)
function Guard:takeAction(ip, reqUri, address, userAgent, httpReferer)
local captchaAction = _Conf.dict_system:get("captchaAction")
local clickAction = _Conf.dict_system:get("clickAction")
local forbiddenAction = _Conf.dict_system:get("forbiddenAction")
local iptablesAction = _Conf.dict_system:get("iptablesAction")
local oneKeyOpenVerificationOn = _Conf.dict_system:get("oneKeyOpenVerificationOn")
if oneKeyOpenVerificationOn == 1 then
self:debug("[takeAction] return captchaAction(oneKeyOpenVerificationOn)" .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
self:captchaAction(ip, reqUri, address)
elseif captchaAction then
self:debug("[takeAction] return captchaAction" .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
self:captchaAction(ip, reqUri, address)
elseif clickAction then
self:debug("[takeAction] return clickAction" .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
self:clickAction(ip, reqUri, address)
elseif forbiddenAction then
self:debug("[takeAction] return forbiddenAction" .. "::" .. userAgent .. "::" .. httpReferer .. "::", ip, reqUri)
self:forbiddenAction()
elseif iptablesAction then
ngx.thread.spawn(Guard.addToIptables, Guard, ip)
end
end
--添加进iptables drop表
function Guard:addToIptables(ip)
local cmd = "echo " .. _Conf.sudoPass .. " | sudo -S /sbin/iptables -I INPUT -p tcp -s " .. ip .. " --dport 80 -j DROP"
os.execute(cmd)
end
--自动开启或关闭防cc功能
function Guard:autoSwitch()
if not _Conf.dict_system:get("monitor") then
local interval = _Conf.dict_system:get("autoEnable_interval")
local normalTimes = _Conf.dict_system:get("autoEnable_normalTimes")
local exceedTimes = _Conf.dict_system:get("autoEnable_exceedTimes")
local maxConnection = _Conf.dict_system:get("autoEnable_maxConnection")
local enableModule = _Conf.dict_system:get("autoEnable_enableModule")
_Conf.dict_system:set("monitor", 0, interval)
local f = io.popen(_Conf.autoEnable.ssCommand .. " -tan state established '( sport = :" .. _Conf.autoEnable.protectPort .. " or dport = :" .. _Conf.autoEnable.protectPort .. " )' | wc -l")
local result = f:read("*all")
local connection = tonumber(result)
Guard:debug("[autoSwitch] current connection for port " .. _Conf.autoEnable.protectPort .. " is " .. connection, "", "")
if enableModule == "redirectModules" then
local redirectOn = _Conf.dict_system:get("redirectOn")
if redirectOn == 1 then
_Conf.dict_system:set("exceedCount", 0) --超限次数清0
--如果当前连接在最大连接之下,为正常次数加1
if connection < maxConnection then
_Conf.dict_system:incr("normalCount", 1)
end
--如果正常次数大于_Conf.autoEnable.normalTimes,关闭redirectModules
local normalCount = _Conf.dict_system:get("normalCount")
if normalCount > normalTimes then
Guard:log("[autoSwitch] turn redirectModules off.")
_Conf.dict_system:set("redirectOn", 0)
end
else
_Conf.dict_system:set("normalCount", 0) --正常次数清0
--如果当前连接在最大连接之上,为超限次数加1
if connection > maxConnection then
_Conf.dict_system:incr("exceedCount", 1)
end
--如果超限次数大于_Conf.autoEnable.exceedTimes,开启redirectModules
local exceedCount = _Conf.dict_system:get("exceedCount")
if exceedCount > exceedTimes then
Guard:log("[autoSwitch] turn redirectModules on.")
_Conf.dict_system:set("redirectOn", 1)
end
end
elseif enableModule == "JsJumpModules" then
local jsOn = _Conf.dict_system:get("jsOn")
if jsOn == 1 then
_Conf.dict_system:set("exceedCount", 0) --超限次数清0
--如果当前连接在最大连接之下,为正常次数加1
if connection < maxConnection then
_Conf.dict_system:incr("normalCount", 1)
end
--如果正常次数大于_Conf.autoEnable.normalTimes,关闭JsJumpModules
local normalCount = _Conf.dict_system:get("normalCount")
if normalCount > normalTimes then
Guard:log("[autoSwitch] turn JsJumpModules off.")
_Conf.dict_system:set("jsOn", 0)
end
else
_Conf.dict_system:set("normalCount", 0) --正常次数清0
--如果当前连接在最大连接之上,为超限次数加1
if connection > maxConnection then
_Conf.dict_system:incr("exceedCount", 1)
end
--如果超限次数大于_Conf.autoEnable.exceedTimes,开启JsJumpModules
local exceedCount = _Conf.dict_system:get("exceedCount")
if exceedCount > exceedTimes then
Guard:log("[autoSwitch] turn JsJumpModules on.")
_Conf.dict_system:set("jsOn", 1)
end
end
elseif enableModule == "cookieModules" then
local cookieOn = _Conf.dict_system:get("cookieOn")
if cookieOn == 1 then
_Conf.dict_system:set("exceedCount", 0) --超限次数清0
--如果当前连接在最大连接之下,为正常次数加1
if connection < maxConnection then
_Conf.dict_system:incr("normalCount", 1)
end
--如果正常次数大于_Conf.autoEnable.normalTimes,关闭cookieModules
local normalCount = _Conf.dict_system:get("normalCount")
if normalCount > normalTimes then
Guard:log("[autoSwitch] turn cookieModules off.")
_Conf.dict_system:set("cookieOn", 0)
end
else
_Conf.dict_system:set("normalCount", 0) --正常次数清0
--如果当前连接在最大连接之上,为超限次数加1
if connection > maxConnection then
_Conf.dict_system:incr("exceedCount", 1)
end
--如果超限次数大于_Conf.autoEnable.exceedTimes,开启cookieModules
local exceedCount = _Conf.dict_system:get("exceedCount")
if exceedCount > exceedTimes then
Guard:log("[autoSwitch] turn cookieModules on.")
_Conf.dict_system:set("cookieOn", 1)
end
end
end
end
end
--click点击验证
function Guard:clickAction(ip, reqUri, address)
if _Conf.captcha2clickOn then
--如果开启了captcha2click, 在用户访问captcha验证页面时显示验证码图片
if ngx.re.match(reqUri, "^/get-captcha.do", "i") then
self:getCaptcha()
end
end
ngx.req.read_body()
local now = ngx.time() --当前时间戳
local preurl = ngx.var["cookie_preurl"] or "/" --获取上次访问url,如果为空则返回首页(返回首页是为了避免用户禁用了 Cookie 而导致无法获取上次访问的URL)
local clickKeyValue = ngx.re.match(reqUri, "keydj=([^&]+)", "i")
local expire = ngx.re.match(reqUri, "expiredj=([^&]+)", "i")
if ngx.re.match(preurl, "verify-captcha.do", "i") then
local from, to, err = ngx.re.find(preurl, "verify-captcha.do", "i")
preurl = string.sub(preurl, 0, from - 1)
end
if clickKeyValue and expire then
--Click验证
local clickKeyValue = clickKeyValue[1]
local expire = expire[1]
local key_make = ngx.md5(table.concat({ ip, _Conf.clickKey, expire }))
local key_make = string.sub(key_make, "1", "10")
if key_make == clickKeyValue and now < tonumber(expire) then
local dict_black = ngx.shared.dict_black
local blackKey = ip .. "black"
dict_black:delete(blackKey) --从黑名单删除该IP
if _Conf.redirectModulesIsOn then
--添加IP到白名单
_Conf.dict_white:set(ip .. "white302", 0, _Conf.whiteTime)
end
if _Conf.JsJumpModulesIsOn then
_Conf.dict_white:set(ip .. "whitejs", 0, _Conf.whiteTime)
end
if _Conf.cookieModulesIsOn then
_Conf.dict_white:set(ip .. "whitecookie", 0, _Conf.whiteTime)
end
local challengeTimesKey = table.concat({ ip, "challengecookie" })
local challengeTimesValue = _Conf.dict_challenge:get(challengeTimesKey)
if challengeTimesValue then
_Conf.dict_challenge:delete(challengeTimesKey) --删除challenge列表中验证失败计数器
end
return ngx.redirect(preurl) --返回上次访问url
else
--如果clickKeyValue expire不合法, 返回click验证页面
local newUrl = ''
local clickCode = 'Error: Click Verify Page is no return'
local expire = now + _Conf.keyExpire
local key_new = ngx.md5(table.concat({ ip, _Conf.clickKey, expire }))
local key_new = string.sub(key_new, "1", "10")
local args = ngx.req.get_uri_args() or {}
local f, t, err = ngx.re.find(reqUri, "\\?&keydj|\\?keydj|&keydj=|keydj=", "ijo")
if f then
--url中是否含 &keydj=或keydj=
reqUri = string.sub(reqUri, 0, f - 1) --url 截断到&keydj=或keydj=
end
if ngx.re.match(reqUri, "\\?$", "ijo") then
newUrl = table.concat({ reqUri, "keydj=", key_new, "&expiredj=", expire })
elseif ngx.re.match(reqUri, "\\?.+", "ijo") then
newUrl = table.concat({ reqUri, "&keydj=", key_new, "&expiredj=", expire })
else
newUrl = table.concat({ reqUri, "?keydj=", key_new, "&expiredj=", expire })
end
--定义click验证页面代码
if _Conf.hiddenClick then
--隐藏click验证页面,自动验证
clickCode = table.concat({ '<meta http-equiv="refresh" content="0; url=', newUrl, '" >' })
--clickCode = table.concat({ '<script>window.location.href="',newUrl,'";</script>' })
else
--click验证页面,倒计时9秒后自动打开目标链接
clickCode = table.concat({ '<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" ><title>Click 2 verity</title><style> #content { position:absolute;width:400px;height:200px;left:50%;top:50%;margin-left:-200px;margin-top:-100px;vertical-align:middle;line-height:200px;text-align:center;font-family:"微软雅黑";font-size:16px } </style><script type="text/javascript"> function countDown(secs,tUrl){ var jumpTo = document.getElementById("jumpTo"); jumpTo.innerHTML=secs; if (--secs>0){ setTimeout("countDown("+secs+",', "'", '"+tUrl+"', "'", ')",1000); } else{ window.location.href=tUrl; } } </script></head> <body><div id="content" ><a href="', newUrl, '">点击继续访问</a> <span id="jumpTo">9</span>″ <script type="text/javascript">countDown(9,"', newUrl, '");</script> </div></body></html>' })
end