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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ--- -- Library methods for handling Cassandra Thrift communication as client -- -- @author Vlatko Kosturjak -- @copyright Same as Nmap--See https://nmap.org/book/man-legal.html -- -- Version 0.1 -- local stdnse = require "stdnse" local string = require "string" _ENV = stdnse.module("cassandra", stdnse.seeall) --[[ Cassandra Thrift protocol implementation. For more information about Cassandra, see: http://cassandra.apache.org/ ]]-- -- Protocol magic strings CASSANDRAREQ = "\x80\x01\x00\x01" CASSANDRARESP = "\x80\x01\x00\x02" CASSLOGINMAGIC = "\x00\x00\x00\x01\x0c\x00\x01\x0d\x00\x01\x0b\x0b\x00\x00\x00\x02" LOGINSUCC = "\x00\x00\x00\x01\x00" LOGINFAIL = "\x00\x00\x00\x01\x0b" LOGINACC = "\x00\x00\x00\x01\x0c" --Returns string in cassandra format for login --@param username to put in format --@param password to put in format --@return str : string in cassandra format for login function loginstr (username, password) return CASSANDRAREQ .. string.pack(">s4", "login") .. CASSLOGINMAGIC .. string.pack(">s4s4s4s4", "username", username, "password", password) .. "\x00\x00" -- add two null on the end end --Invokes command over socket and returns the response --@param socket to connect to --@param command to invoke --@param cnt is protocol count --@return status : true if ok; false if bad --@return result : value if status ok, error msg if bad function cmdstr (command,cnt) return CASSANDRAREQ .. string.pack(">s4I4", command, cnt) .. "\x00" -- add null on the end end --Invokes command over socket and returns the response --@param socket to connect to --@param command to invoke --@param cnt is protocol count --@return status : true if ok; false if bad --@return result : value if status ok, error msg if bad function sendcmd (socket, command, cnt) local cmdstr = cmdstr (command,cnt) local response local status, err = socket:send(string.pack(">I4", #cmdstr)) if ( not(status) ) then return false, "error sending packet length" end status, err = socket:send(cmdstr) if ( not(status) ) then return false, "error sending packet payload" end status, response = socket:receive_bytes(4) if ( not(status) ) then return false, "error receiving length" end local size = string.unpack(">I4", response) if #response < size + 4 then local resp2 status, resp2 = socket:receive_bytes(size + 4 - #response) if ( not(status) ) then return false, "error receiving payload" end response = response .. resp2 end -- magic response starts at 5th byte for 4 bytes, 4 byte for length + length of string command if response:sub(5, 8 + 4 + #command) ~= CASSANDRARESP .. string.pack(">s4", command) then return false, "protocol response error" end return true, response end --Return Cluster Name --@param socket to connect to --@param cnt is protocol count --@return status : true if ok; false if bad --@return result : value if status ok, error msg if bad function describe_cluster_name (socket,cnt) local cname = "describe_cluster_name" local status,resp = sendcmd(socket,cname,cnt) if (not(status)) then stdnse.debug1("sendcmd"..resp) return false, "error in communication" end -- grab the size -- pktlen(4) + CASSANDRARESP(4) + lencmd(4) + lencmd(v) + params(7) + next byte position local position = 12 + #cname + 7 + 1 local value = string.unpack(">s4", resp, position) return true, value end --Return API version --@param socket to connect to --@param cnt is protocol count --@return status : true if ok; false if bad --@return result : value if status ok, error msg if bad function describe_version (socket,cnt) local cname = "describe_version" local status,resp = sendcmd(socket,cname,cnt) if (not(status)) then stdnse.debug1("sendcmd"..resp) return false, "error in communication" end -- grab the size -- pktlen(4) + CASSANDRARESP(4) + lencmd(4) + lencmd(v) + params(7) + next byte position local position = 12 + #cname + 7 + 1 local value = string.unpack(">s4", resp, position) return true, value end --Login to Cassandra --@param socket to connect to --@param username to connect to --@param password to connect to --@return status : true if ok; false if bad --@return result : table of status ok, error msg if bad --@return if status ok : remaining data read from socket but not used function login (socket,username,password) local loginstr = loginstr (username, password) local combo = username..":"..password local status, err = socket:send(string.pack(">I4", #loginstr)) if ( not(status) ) then stdnse.debug3("cannot send len "..combo) return false, "Failed to connect to server" end status, err = socket:send(loginstr) if ( not(status) ) then stdnse.debug3("Sent packet for "..combo) return false, err end local response status, response = socket:receive_bytes(22) if ( not(status) ) then stdnse.debug3("Receive packet for "..combo) return false, err end local size = string.unpack(">I4", response) local loginresp = string.sub(response,5,17) if (loginresp ~= CASSANDRARESP .. string.pack(">s4", "login")) then return false, "protocol error" end local magic = string.sub(response,18,22) stdnse.debug3("packet for "..combo) stdnse.debug3("packet hex: %s", stdnse.tohex(response) ) stdnse.debug3("size packet hex: %s", stdnse.tohex(size) ) stdnse.debug3("magic packet hex: %s", stdnse.tohex(magic) ) if (magic == LOGINSUCC) then return true else return false, "Login failed." end end return _ENV;