proxmark3/client/scripts/tnp3dump.lua

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local cmds = require('commands')
local getopt = require('getopt')
local bin = require('bin')
local lib14a = require('read14a')
local utils = require('utils')
local md5 = require('md5')
local dumplib = require('html_dumplib')
local toyNames = require('default_toys')
example =[[
1. script run tnp3dump
2. script run tnp3dump -n
3. script run tnp3dump -k aabbccddeeff
4. script run tnp3dump -k aabbccddeeff -n
5. script run tnp3dump -o myfile
6. script run tnp3dump -n -o myfile
7. script run tnp3dump -k aabbccddeeff -n -o myfile
]]
author = "Iceman"
usage = "script run tnp3dump -k <key> -n -o <filename>"
desc =[[
This script will try to dump the contents of a Mifare TNP3xxx card.
It will need a valid KeyA in order to find the other keys and decode the card.
Arguments:
-h : this help
-k <key> : Sector 0 Key A.
-n : Use the nested cmd to find all keys
-o : filename for the saved dumps
]]
local HASHCONSTANT = '20436F707972696768742028432920323031302041637469766973696F6E2E20416C6C205269676874732052657365727665642E20'
local TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
local DEBUG = false -- the debug flag
local numBlocks = 64
local numSectors = 16
---
-- A debug printout-function
function dbg(args)
if not DEBUG then
return
end
if type(args) == "table" then
local i = 1
while result[i] do
dbg(result[i])
i = i+1
end
else
print("###", args)
end
end
---
-- This is only meant to be used when errors occur
function oops(err)
print("ERROR: ",err)
end
---
-- Usage help
function help()
print(desc)
print("Example usage")
print(example)
end
--
-- Exit message
function ExitMsg(msg)
print( string.rep('--',20) )
print( string.rep('--',20) )
print(msg)
print()
end
local function readdumpkeys(infile)
t = infile:read("*all")
len = string.len(t)
local len,hex = bin.unpack(("H%d"):format(len),t)
return hex
end
local function waitCmd()
local response = core.WaitForResponseTimeout(cmds.CMD_ACK,TIMEOUT)
if response then
local count,cmd,arg0 = bin.unpack('LL',response)
if(arg0==1) then
local count,arg1,arg2,data = bin.unpack('LLH511',response,count)
return data:sub(1,32)
else
return nil, "Couldn't read block.."
end
end
return nil, "No response from device"
end
local function computeCrc16(s)
local hash = core.crc16(utils.ConvertHexToAscii(s))
return hash
end
local function reverseCrcBytes(crc)
crc2 = crc:sub(3,4)..crc:sub(1,2)
return tonumber(crc2,16)
end
local function main(args)
print( string.rep('--',20) )
print( string.rep('--',20) )
local keyA
local cmd
local err
local useNested = false
local cmdReadBlockString = 'hf mf rdbl %d A %s'
local input = "dumpkeys.bin"
local outputTemplate = os.date("toydump_%Y-%m-%d_%H%M%S");
-- Arguments for the script
for o, a in getopt.getopt(args, 'hk:no:') do
if o == "h" then return help() end
if o == "k" then keyA = a end
if o == "n" then useNested = true end
if o == "o" then outputTemplate = a end
end
-- validate input args.
keyA = keyA or '4b0b20107ccb'
if #(keyA) ~= 12 then
return oops( string.format('Wrong length of write key (was %d) expected 12', #keyA))
end
-- Turn off Debug
local cmdSetDbgOff = "hf mf dbg 0"
core.console( cmdSetDbgOff)
result, err = lib14a.read1443a(false)
if not result then
return oops(err)
end
core.clearCommandBuffer()
if 0x01 ~= result.sak then -- NXP MIFARE TNP3xxx
return oops('This is not a TNP3xxx tag. aborting.')
end
-- Show tag info
print((' Found tag : %s'):format(result.name))
print(('Using keyA : %s'):format(keyA))
--Trying to find the other keys
if useNested then
core.console( ('hf mf nested 1 0 A %s d'):format(keyA) )
end
core.clearCommandBuffer()
-- Loading keyfile
print('Loading dumpkeys.bin')
local hex, err = utils.ReadDumpFile(input)
if not hex then
return oops(err)
end
local akeys = hex:sub(0,12*16)
-- Read block 0
cmd = Command:new{cmd = cmds.CMD_MIFARE_READBL, arg1 = 0,arg2 = 0,arg3 = 0, data = keyA}
err = core.SendCommand(cmd:getBytes())
if err then return oops(err) end
local block0, err = waitCmd()
if err then return oops(err) end
-- Read block 1
cmd = Command:new{cmd = cmds.CMD_MIFARE_READBL, arg1 = 1,arg2 = 0,arg3 = 0, data = keyA}
err = core.SendCommand(cmd:getBytes())
if err then return oops(err) end
local block1, err = waitCmd()
if err then return oops(err) end
local key
local pos = 0
local blockNo
local blocks = {}
print('Reading card data')
core.clearCommandBuffer()
-- main loop
io.write('Decrypting blocks > ')
for blockNo = 0, numBlocks-1, 1 do
if core.ukbhit() then
print("aborted by user")
break
end
pos = (math.floor( blockNo / 4 ) * 12)+1
key = akeys:sub(pos, pos + 11 )
cmd = Command:new{cmd = cmds.CMD_MIFARE_READBL, arg1 = blockNo ,arg2 = 0,arg3 = 0, data = key}
local err = core.SendCommand(cmd:getBytes())
if err then return oops(err) end
local blockdata, err = waitCmd()
if err then return oops(err) end
if blockNo%4 ~= 3 then
if blockNo < 8 then
-- Block 0-7 not encrypted
blocks[blockNo+1] = ('%02d :: %s'):format(blockNo,blockdata)
else
local base = ('%s%s%02x%s'):format(block0, block1, blockNo, HASHCONSTANT)
local baseStr = utils.ConvertHexToAscii(base)
local md5hash = md5.sumhexa(baseStr)
local aestest = core.aes(md5hash, blockdata)
local hex = utils.ConvertAsciiToBytes(aestest)
hex = utils.ConvertBytesToHex(hex)
-- blocks with zero not encrypted.
if string.find(blockdata, '^0+$') then
blocks[blockNo+1] = ('%02d :: %s'):format(blockNo,blockdata)
else
blocks[blockNo+1] = ('%02d :: %s'):format(blockNo,hex)
io.write( blockNo..',')
end
end
else
-- Sectorblocks, not encrypted
blocks[blockNo+1] = ('%02d :: %s%s'):format(blockNo,key,blockdata:sub(13,32))
end
end
io.write('\n')
core.clearCommandBuffer()
-- Print results
local bindata = {}
local emldata = ''
for _,s in pairs(blocks) do
local slice = s:sub(8,#s)
local str = utils.ConvertBytesToAscii(
utils.ConvertHexToBytes(slice)
)
emldata = emldata..slice..'\n'
for c in (str):gmatch('.') do
bindata[#bindata+1] = c
end
end
local uid = block0:sub(1,8)
local itemtype = block1:sub(1,4)
local cardid = block1:sub(9,24)
local traptype = block1:sub(25,28)
-- Write dump to files
if not DEBUG then
local foo = dumplib.SaveAsBinary(bindata, outputTemplate..'_uid_'..uid..'.bin')
print(("Wrote a BIN dump to the file %s"):format(foo))
local bar = dumplib.SaveAsText(emldata, outputTemplate..'_uid_'..uid..'.eml')
print(("Wrote a EML dump to the file %s"):format(bar))
end
-- Show info
print( string.rep('--',20) )
print( (' ITEM TYPE : 0x%s - %s'):format(itemtype, toyNames[itemtype]) )
print( (' Alter ego / traptype : 0x%s'):format(traptype) )
print( (' UID : 0x%s'):format(uid) )
print( (' CARDID : 0x%s'):format(cardid ) )
print( string.rep('--',20) )
end
main(args)