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[proxmark3-svn] / client / scripts / tnp3.lua
1 local cmds = require('commands')
2 local getopt = require('getopt')
3 local bin = require('bin')
4 local lib14a = require('read14a')
5 local utils = require('utils')
6 local md5 = require('md5')
7 local dumplib = require('html_dumplib')
8 local toyNames = require('default_toys')
9
10 example =[[
11 1. script run tnp3
12 2. script run tnp3 -n
13 3. script run tnp3 -k aabbccddeeff
14 4. script run tnp3 -k aabbccddeeff -n
15 5. script run tnp3 -o myfile
16 6. script run tnp3 -n -o myfile
17 7. script run tnp3 -k aabbccddeeff -n -o myfile
18 ]]
19 author = "Iceman"
20 usage = "script run tnp3 -k <key> -n -o <filename>"
21 desc =[[
22 This script will try to dump the contents of a Mifare TNP3xxx card.
23 It will need a valid KeyA in order to find the other keys and decode the card.
24 Arguments:
25 -h : this help
26 -k <key> : Sector 0 Key A.
27 -n : Use the nested cmd to find all keys
28 -o : filename for the saved dumps
29 ]]
30
31 local HASHCONSTANT = '20436F707972696768742028432920323031302041637469766973696F6E2E20416C6C205269676874732052657365727665642E20'
32
33 local TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
34 local DEBUG = false -- the debug flag
35 local numBlocks = 64
36 local numSectors = 16
37 ---
38 -- A debug printout-function
39 function dbg(args)
40 if not DEBUG then
41 return
42 end
43
44 if type(args) == "table" then
45 local i = 1
46 while result[i] do
47 dbg(result[i])
48 i = i+1
49 end
50 else
51 print("###", args)
52 end
53 end
54 ---
55 -- This is only meant to be used when errors occur
56 function oops(err)
57 print("ERROR: ",err)
58 end
59 ---
60 -- Usage help
61 function help()
62 print(desc)
63 print("Example usage")
64 print(example)
65 end
66 --
67 -- Exit message
68 function ExitMsg(msg)
69 print( string.rep('--',20) )
70 print( string.rep('--',20) )
71 print(msg)
72 print()
73 end
74
75 local function readdumpkeys(infile)
76 t = infile:read("*all")
77 len = string.len(t)
78 local len,hex = bin.unpack(("H%d"):format(len),t)
79 return hex
80 end
81
82 local function waitCmd()
83 local response = core.WaitForResponseTimeout(cmds.CMD_ACK,TIMEOUT)
84 if response then
85 local count,cmd,arg0 = bin.unpack('LL',response)
86 if(arg0==1) then
87 local count,arg1,arg2,data = bin.unpack('LLH511',response,count)
88 return data:sub(1,32)
89 else
90 return nil, "Couldn't read block.."
91 end
92 end
93 return nil, "No response from device"
94 end
95
96 local function computeCrc16(s)
97 local hash = core.crc16(utils.ConvertHexToAscii(s))
98 return hash
99 end
100
101 local function reverseCrcBytes(crc)
102 crc2 = crc:sub(3,4)..crc:sub(1,2)
103 return tonumber(crc2,16)
104 end
105
106 local function main(args)
107
108 print( string.rep('--',20) )
109 print( string.rep('--',20) )
110
111 local keyA
112 local cmd
113 local err
114 local useNested = false
115 local cmdReadBlockString = 'hf mf rdbl %d A %s'
116 local input = "dumpkeys.bin"
117 local outputTemplate = os.date("toydump_%Y-%m-%d_%H%M%S");
118
119 -- Arguments for the script
120 for o, a in getopt.getopt(args, 'hk:no:') do
121 if o == "h" then return help() end
122 if o == "k" then keyA = a end
123 if o == "n" then useNested = true end
124 if o == "o" then outputTemplate = a end
125 end
126
127 -- validate input args.
128 keyA = keyA or '4b0b20107ccb'
129 if #(keyA) ~= 12 then
130 return oops( string.format('Wrong length of write key (was %d) expected 12', #keyA))
131 end
132
133 -- Turn off Debug
134 local cmdSetDbgOff = "hf mf dbg 0"
135 core.console( cmdSetDbgOff)
136
137 result, err = lib14a.read1443a(false)
138 if not result then
139 return oops(err)
140 end
141
142 core.clearCommandBuffer()
143
144 if 0x01 ~= result.sak then -- NXP MIFARE TNP3xxx
145 return oops('This is not a TNP3xxx tag. aborting.')
146 end
147
148 -- Show tag info
149 print((' Found tag : %s'):format(result.name))
150 print(('Using keyA : %s'):format(keyA))
151
152 --Trying to find the other keys
153 if useNested then
154 core.console( ('hf mf nested 1 0 A %s d'):format(keyA) )
155 end
156
157 core.clearCommandBuffer()
158
159 -- Loading keyfile
160 print('Loading dumpkeys.bin')
161 local hex, err = utils.ReadDumpFile(input)
162 if not hex then
163 return oops(err)
164 end
165
166 local akeys = hex:sub(0,12*16)
167
168 -- Read block 0
169 cmd = Command:new{cmd = cmds.CMD_MIFARE_READBL, arg1 = 0,arg2 = 0,arg3 = 0, data = keyA}
170 err = core.SendCommand(cmd:getBytes())
171 if err then return oops(err) end
172 local block0, err = waitCmd()
173 if err then return oops(err) end
174
175 -- Read block 1
176 cmd = Command:new{cmd = cmds.CMD_MIFARE_READBL, arg1 = 1,arg2 = 0,arg3 = 0, data = keyA}
177 err = core.SendCommand(cmd:getBytes())
178 if err then return oops(err) end
179 local block1, err = waitCmd()
180 if err then return oops(err) end
181
182 local key
183 local pos = 0
184 local blockNo
185 local blocks = {}
186
187 print('Reading card data')
188 core.clearCommandBuffer()
189
190 -- main loop
191 io.write('Decrypting blocks > ')
192 for blockNo = 0, numBlocks-1, 1 do
193
194 if core.ukbhit() then
195 print("aborted by user")
196 break
197 end
198
199 pos = (math.floor( blockNo / 4 ) * 12)+1
200 key = akeys:sub(pos, pos + 11 )
201 cmd = Command:new{cmd = cmds.CMD_MIFARE_READBL, arg1 = blockNo ,arg2 = 0,arg3 = 0, data = key}
202 local err = core.SendCommand(cmd:getBytes())
203 if err then return oops(err) end
204 local blockdata, err = waitCmd()
205 if err then return oops(err) end
206
207 if blockNo%4 ~= 3 then
208 if blockNo < 8 then
209 -- Block 0-7 not encrypted
210 blocks[blockNo+1] = ('%02d :: %s'):format(blockNo,blockdata)
211 else
212 local base = ('%s%s%02x%s'):format(block0, block1, blockNo, HASHCONSTANT)
213 local baseStr = utils.ConvertHexToAscii(base)
214 local md5hash = md5.sumhexa(baseStr)
215 local aestest = core.aes(md5hash, blockdata)
216
217 local hex = utils.ConvertAsciiToBytes(aestest)
218 hex = utils.ConvertBytesToHex(hex)
219 --local _,hex = bin.unpack(("H%d"):format(16),aestest)
220
221 -- blocks with zero not encrypted.
222 if string.find(blockdata, '^0+$') then
223 blocks[blockNo+1] = ('%02d :: %s'):format(blockNo,blockdata)
224 else
225 blocks[blockNo+1] = ('%02d :: %s'):format(blockNo,hex)
226 io.write( blockNo..',')
227 end
228 end
229 else
230 -- Sectorblocks, not encrypted
231 blocks[blockNo+1] = ('%02d :: %s%s'):format(blockNo,key,blockdata:sub(13,32))
232 end
233 end
234 io.write('\n')
235
236 core.clearCommandBuffer()
237
238 -- Print results
239 local bindata = {}
240 local emldata = ''
241
242 for _,s in pairs(blocks) do
243 local slice = s:sub(8,#s)
244 local str = utils.ConvertBytesToAscii(
245 utils.ConvertHexToBytes(slice)
246 )
247 emldata = emldata..slice..'\n'
248 for c in (str):gmatch('.') do
249 bindata[#bindata+1] = c
250 end
251 end
252
253 -- Write dump to files
254 if not DEBUG then
255 local foo = dumplib.SaveAsBinary(bindata, outputTemplate..'.bin')
256 print(("Wrote a BIN dump to the file %s"):format(foo))
257 local bar = dumplib.SaveAsText(emldata, outputTemplate..'.eml')
258 print(("Wrote a EML dump to the file %s"):format(bar))
259 end
260
261 local uid = block0:sub(1,8)
262 local itemtype = block1:sub(1,4)
263 local cardid = block1:sub(9,24)
264
265 -- Show info
266 print( string.rep('--',20) )
267 print( (' ITEM TYPE : 0x%s - %s'):format(itemtype, toyNames[itemtype]) )
268 print( (' UID : 0x%s'):format(uid) )
269 print( (' CARDID : 0x%s'):format(cardid ) )
270 print( string.rep('--',20) )
271
272 end
273 main(args)
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