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[proxmark3-svn] / client / scripts / ufodump.lua
1 local cmds = require('commands')
2 local getopt = require('getopt')
3 local lib14a = require('read14a')
4 local utils = require('utils')
5 example = [[
6 script run ufodump
7 script run ufodump -b 10
8 ]]
9 author = "Iceman"
10 desc =
11 [[
12 This is a script that reads AZTEK iso14443a tags.
13 It starts from block 0, and ends at default block 20. Use 'b' to say different endblock.
14
15 xor: the first three block (0,1,2) is not XORED. The rest seems to be xored.
16
17 Arguments:
18 h this helptext
19 b endblock in decimal (1-255, default 20)
20 ]]
21
22 -- Some globals
23 local TIMEOUT = 2000 -- Shouldn't take longer than 2 seconds
24 local DEBUG = false -- the debug flag
25 ---
26 -- A debug printout-function
27 function dbg(args)
28 if DEBUG then
29 print("###", args)
30 end
31 end
32 ---
33 -- This is only meant to be used when errors occur
34 function oops(err)
35 print("ERROR: ",err)
36 core.clearCommandBuffer()
37 end
38 ---
39 -- Usage help
40 function help()
41 print(desc)
42 print("Example usage")
43 print(example)
44 end
45 --
46 -- writes data to ascii textfile.
47 function writeDumpFile(uid, blockData)
48 local destination = string.format("%s.eml", uid)
49 local file = io.open(destination, "w")
50 if file == nil then
51 return nil, string.format("Could not write to file %s", destination)
52 end
53 local rowlen = string.len(blockData[1])
54
55 for i,block in ipairs(blockData) do
56 if rowlen ~= string.len(block) then
57 print(string.format("WARNING: Dumpdata seems corrupted, line %d was not the same length as line 1",i))
58 end
59 file:write(block.."\n")
60 end
61 file:close()
62 return destination
63 end
64 --
65 --- Picks out and displays the data read from a tag
66 -- Specifically, takes a usb packet, converts to a Command
67 -- (as in commands.lua), takes the data-array and
68 -- reads the number of bytes specified in arg1 (arg0 in c-struct)
69 -- and displays the data
70 -- @blockno just to print which block the data belong to
71 -- @param usbpacket the data received from the device
72 function showdata(blockno, data)
73 local xorkey = '55AA55AA55AA55AA6262'
74 --local s = data.." | "..utils.ConvertHexToAscii(data).." | "
75 local s = data.." | "
76 local dex = ''
77 local rs
78 for i = 1, 20-4, 4 do
79 local item = string.sub(data, i, i+3)
80 local xor = string.sub(xorkey, i, i+3)
81
82 if blockno > 2 then
83 rs = bit32.bxor(tonumber(item,16) , tonumber(xor,16))
84 else
85 rs = tonumber(item, 16)
86 end
87 dex = (dex..'%04X'):format(rs)
88 end
89 --s = s..dex.." | "..utils.ConvertHexToAscii(dex)
90 s = s..dex.." | "
91 print( (" %02d | %s"):format(blockno,s))
92 end
93 --
94 -- Send a "raw" iso14443a package, ie "hf 14a raw" command
95 function sendRaw(rawdata, options)
96 --print(">> ", rawdata)
97 local flags = lib14a.ISO14A_COMMAND.ISO14A_NO_DISCONNECT + lib14a.ISO14A_COMMAND.ISO14A_RAW + lib14a.ISO14A_COMMAND.ISO14A_APPEND_CRC
98 local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a,
99 arg1 = flags, -- Send raw
100 -- arg2 contains the length, which is half the length
101 -- of the ASCII-string rawdata
102 arg2 = string.len(rawdata)/2,
103 data = rawdata}
104 return lib14a.sendToDevice(command, options.ignore_response)
105 end
106 --
107 -- Sends an instruction to do nothing, only disconnect
108 function disconnect()
109 local command = Command:new{cmd = cmds.CMD_READER_ISO_14443a, arg1 = 0, }
110 -- We can ignore the response here, no ACK is returned for this command
111 -- Check /armsrc/iso14443a.c, ReaderIso14443a() for details
112 return lib14a.sendToDevice(command, true)
113 --core.console("hf 14a raw -r")
114 end
115 ---
116 -- The main entry point
117 function main(args)
118
119 local ignore_response = false
120 local endblock = 20
121
122 -- Read the parameters
123 for o, a in getopt.getopt(args, 'hb:') do
124 if o == "h" then return help() end
125 if o == "b" then endblock = a end
126 end
127 endblock = endblock or 20
128
129 -- First of all, connect
130 info, err = lib14a.read1443a(true)
131 if err then disconnect() return oops(err) end
132 core.clearCommandBuffer()
133
134 local blockData = {}
135
136 -- Show tag info
137 print(("\nFound Card UID [%s]\n"):format(info.uid))
138
139 print("blk | data | xored")
140 print("----+------------------+-------------------")
141 for block = 00, endblock do
142 local cmd = string.format("10%02x00", block)
143 res, err = sendRaw(cmd , {ignore_response = ignore_response})
144 if err then disconnect() return oops(err) end
145
146 local cmd_response = Command.parse(res)
147 local len = tonumber(cmd_response.arg1) * 2
148 local data = string.sub(tostring(cmd_response.data), 0, len-4)
149
150 showdata(block, data)
151 table.insert(blockData, data)
152 end
153 print("----+------------------+-------------------")
154 disconnect()
155
156 local filename, err = writeDumpFile(info.uid, blockData)
157 if err then return oops(err) end
158
159 print(string.format("\nDumped data into %s", filename))
160 end
161
162
163
164
165 -------------------------
166 -- Testing
167 -------------------------
168 function selftest()
169 DEBUG = true
170 dbg("Performing test")
171 main()
172 dbg("Tests done")
173 end
174 -- Flip the switch here to perform a sanity check.
175 -- It read a nonce in two different ways, as specified in the usage-section
176 if "--test"==args then
177 selftest()
178 else
179 -- Call the main
180 main(args)
181 end
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