example = "script run mifare_autopwn"
author = "Martin Holst Swende"
-
-
desc =
[[
This is a which automates cracking and dumping mifare classic cards. It sets itself into
-- Some utilities
-------------------------------
local DEBUG = false
+local MIFARE_AUTH_KEYA = 0x60
+local MIFARE_AUTH_KEYB = 0x61
---
-- A debug printout-function
function dbg(args)
function mfcrack()
core.clearCommandBuffer()
-- Build the mifare-command
- local cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 1}
+ local cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 1, arg2 = 0, arg3 = MIFARE_AUTH_KEYA}
local retry = true
while retry do
if errormessage then return nil, errormessage end
-- Try again..set arg1 to 0 this time.
- cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 0}
+ cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 0, arg2 = 0, arg3 = MIFARE_AUTH_KEYA}
end
return nil, "Aborted by user"
end
-
function mfcrack_inner()
while not core.ukbhit() do
local result = core.WaitForResponseTimeout(cmds.CMD_ACK,1000)
if result then
- -- Unpacking the three arg-parameters
- local count,cmd,isOK = bin.unpack('LL',result)
- if isOK ~= 1 then return nil, "Error occurred" end
+ --[[
+ I don't understand, they cmd and args are defined as uint32_t, however,
+ looking at the returned data, they all look like 64-bit things:
+
+ print("result", bin.unpack("HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH", result))
+
+ FF 00 00 00 00 00 00 00 <-- 64 bits of data
+ FE FF FF FF 00 00 00 00 <-- 64 bits of data
+ 00 00 00 00 00 00 00 00 <-- 64 bits of data
+ 00 00 00 00 00 00 00 00 <-- 64 bits of data
+ 04 7F 12 E2 00 <-- this is where 'data' starts
+
+ So below I use LI to pick out the "FEFF FFFF", don't know why it works..
+ --]]
+ -- Unpacking the arg-parameters
+ local count,cmd,isOK = bin.unpack('LI',result)
+ --print("response", isOK)--FF FF FF FF
+ if isOK == 0xFFFFFFFF then
+ return nil, "Button pressed. Aborted."
+ elseif isOK == 0xFFFFFFFE then
+ return nil, "Card is not vulnerable to Darkside attack (doesn't send NACK on authentication requests). You can try 'script run mfkeys' or 'hf mf chk' to test various known keys."
+ elseif isOK == 0xFFFFFFFD then
+ return nil, "Card is not vulnerable to Darkside attack (its random number generator is not predictable). You can try 'script run mfkeys' or 'hf mf chk' to test various known keys."
+ elseif isOK == 0xFFFFFFFC then
+ return nil, "The card's random number generator behaves somewhat weird (Mifare clone?). You can try 'script run mfkeys' or 'hf mf chk' to test various known keys."
+ elseif isOK ~= 1 then
+ return nil, "Error occurred"
+ end
-- The data-part is left
local uid,nt,pl = get(4),get(4),get(8)
local ks,nr = get(8),get(4)
- local status, key = core.nonce2key(uid,nt, nr, pl,ks)
+ local status, key = core.nonce2key(uid, nt, nr, pl, ks)
if not status then return status,key end
if status > 0 then
return nil, "Aborted by user"
end
-function nested(key)
- local cmd = string.format("hf mf nested 1 0 A %s d",key)
+function nested(key,sak)
+ local typ = 1
+ if 0x18 == sak then --NXP MIFARE Classic 4k | Plus 4k
+ typ = 4
+ elseif 0x08 == sak then -- NXP MIFARE CLASSIC 1k | Plus 2k
+ typ= 1
+ elseif 0x09 == sak then -- NXP MIFARE Mini 0.3k
+ typ = 0
+ elseif 0x10 == sak then-- "NXP MIFARE Plus 2k"
+ typ = 2
+ elseif 0x01 == sak then-- "NXP MIFARE TNP3xxx 1K"
+ typ = 1
+ else
+ print("I don't know how many sectors there are on this type of card, defaulting to 16")
+ end
+ local cmd = string.format("hf mf nested %d 0 A %s d",typ,key)
core.console(cmd)
end
-- The main entry point
function main(args)
-
- local verbose, exit,res,uid,err,_
+ local verbose, exit,res,uid,err,_,sak
local seen_uids = {}
-
+ local print_message = true
-- Read the parameters
for o, a in getopt.getopt(args, 'hd') do
if o == "h" then help() return end
end
while not exit do
+ if print_message then
+ print("Waiting for card or press any key to stop")
+ print_message = false
+ end
res, err = wait_for_mifare()
if err then return oops(err) end
-- Seen already?
uid = res.uid
+ sak = res.sak
if not seen_uids[uid] then
-- Store it
seen_uids[uid] = uid
- print("Card found, commencing crack", uid)
+ print("Card found, commencing crack on UID", uid)
-- Crack it
local key, cnt
res,err = mfcrack()
if not res then return oops(err) end
- _,key = bin.unpack("H6",res)
- print("Key ", key)
+ -- The key is actually 8 bytes, so a
+ -- 6-byte key is sent as 00XXXXXX
+ -- This means we unpack it as first
+ -- two bytes, then six bytes actual key data
+ -- We can discard first and second return values
+ _,_,key = bin.unpack("H2H6",res)
+ print("Found valid key: "..key);
-- Use nested attack
- nested(key)
+ nested(key,sak)
-- Dump info
dump(uid)
+ print_message = true
end
end
end
projects / proxmark3-svn / blobdiff