function displaycapd(pa)
ngx.header.content_type = "text/html"
local cookie, err = cook:new()
if not cookie then
ngx.log(ngx.ERR, err)
ngx.say("cookie error")
ngx.exit(200)
end
local blocked_cookies = ngx.shared.blocked_cookies
local field, err = cookie:get("dcap")
plaintext = decrypt(field)
cookdata = split(plaintext, "|")
if (cookdata[2] == "cap_not_solved") then
if (cookdata[6] == "3") then
blocked_cookies:set(field, 1, 120)
local ni = random.number(5,20)
local tstamp = ngx.now() + ni
local plaintext = random.token(random.number(5, 20)) .. "|queue|" .. tstamp .. "|" .. pa .. "|"
local ciphertext = encrypt(plaintext)
cookie:set(
{
key = "dcap",
value = ciphertext,
path = "/",
domain = ngx.var.host,
httponly = true,
max_age = 30,
samesite = "Lax"
})
ngx.header["Refresh"] = ni
ngx.header.content_type = "text/html"
local file = io.open("/etc/nginx/resty/queue.html")
local queue, err = file:read("*a")
file:close()
ngx.say(queue)
ngx.flush()
ngx.exit(200)
end
end
local function getChallenge()
local success, module = pcall(require, "challenge")
if not success then
ngx.header["Refresh"] = '5'
ngx.say("Captcha racetime condition hit. Refreshing in 5 seconds.")
ngx.exit(200)
end
local ni = random.number(0,49)
if challengeArray[ni] ~= nil then
local challenge = challengeArray[ni]
return split(challenge, "*")
else
ngx.header["Refresh"] = '5'
ngx.say("Captcha racetime condition hit. Refreshing in 5 seconds.")
ngx.exit(200)
end
end
local im = getChallenge()
local challengeStyle = im[1]
local challengeAnswer = im[2]
local challengeImage = im[3]
local tstamp = ngx.now()
local newcookdata = random.token(random.number(5, 20)) .. "|cap_not_solved|" .. tstamp .. "|" .. pa .. "|" .. challengeAnswer
if (cookdata[2] == "queue") then
newcookdata = newcookdata .. "|1"
else
newcookdata = newcookdata .. "|" .. tonumber(cookdata[6] + 1)
end
local ciphertext = encrypt(newcookdata)
local ok, err =
cookie:set(
{
key = "dcap",
value = ciphertext,
path = "/",
domain = ngx.var.host,
httponly = true,
samesite = "Lax"
}
)
blocked_cookies:set(field, 1, 120)
if not ok then
ngx.say("cookie error")
ngx.exit(200)
end
ngx.say([[
DDOS Protection
SITENAME
network
SITENAME
SITETAGLINE
since SITESINCE
]])
if caperror ~= nil then
ngx.say('
' .. caperror .. '
')
else
ngx.say('
Select each text box and enter the letter or number you see within the circle below.
')
end
ngx.say([[
]])
--if you need the answer right away for testing
--ngx.say(challengeAnswer)
end