ngx_lua_waf是一个基于lua-nginx-module(openresty)的web应用防火墙
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function log(method,url,data)
file=assert(io.open("/data/logs/hack/"..ngx.var.server_name.."_sec.log","a"))
if data then
if ngx.var.http_user_agent then
file:write(ngx.var.remote_addr.." ".." ["..ngx.localtime().."] \""..method.." "..url.."\" \""..data.."\" \""..ngx.status.."\" \""..ngx.var.http_user_agent.."\"\n")
else
file:write(ngx.var.remote_addr.." ".." ["..ngx.localtime().."] \""..method.." "..url.."\" \""..data.."\" \"-\"\n")
end
else
if ngx.var.http_user_agent then
file:write(ngx.var.remote_addr.." ".." ["..ngx.localtime().."] \""..method.." "..url.."\" \"-\" \""..ngx.var.http_user_agent.."\"\n")
else
file:write(ngx.var.remote_addr.." ".." ["..ngx.localtime().."] \""..method.." "..url.."\" \"-\" \"".."-\"\n")
end
end
file:close()
end
function check()
ngx.header.content_type = "text/html"
ngx.print("just a joke hehe~ !!")
ngx.exit(200)
end
function read_rule(var)
file = io.open("/usr/local/nginx/conf/wafconf/"..var,"r")
t = {}
for line in file:lines() do
table.insert(t,line)
end
return(table.concat(t,"|"))
end
regex=read_rule('phpids')
get=read_rule('get')
post=read_rule('post')
agent=read_rule('user-agent')
whitelist=read_rule('whitelist')
if ngx.re.match(ngx.var.request_uri,whitelist,"i") then
return
elseif ngx.req.get_body_data() and ngx.re.match(ngx.req.get_body_data(),[[^(?!Content-Disposition: form-data;(.*)filename="(.*).(php|jsp|phtml)").*$]],"i") then
return
else
if ngx.re.match(ngx.unescape_uri(ngx.var.request_uri),regex.."|"..get,"isjo") then
log('GET',ngx.unescape_uri(ngx.var.request_uri))
check()
elseif ngx.req.get_body_data() and ngx.re.match(ngx.unescape_uri(ngx.req.get_body_data()),regex,"isjo")then
log('POST',ngx.unescape_uri(ngx.var.request_uri),ngx.unescape_uri(ngx.req.get_body_data()))
check()
-- elseif ngx.req.get_headers()["Cookie"] and ngx.re.match(ngx.unescape_uri(ngx.req.get_headers()["Cookie"]),regex,"isjo")then
-- log('COOKIE',ngx.unescape_uri(ngx.var.request_uri),ngx.unescape_uri(ngx.req.get_headers()["Cookie"]))
-- check()
elseif ngx.var.http_user_agent and ngx.re.match(ngx.var.http_user_agent,regex.."|"..agent,"isjo") then
log('USER-AGENT',ngx.unescape_uri(ngx.var.request_uri))
check()
elseif ngx.req.get_headers()['Acunetix-Aspect'] then
ngx.exit(400)
else
return
end
end