| 1 | --[[ |
| 2 | This is an example of Lua-scripting within proxmark3. This is a lua-side |
| 3 | implementation of hf mf chk |
| 4 | |
| 5 | This code is licensed to you under the terms of the GNU GPL, version 2 or, |
| 6 | at your option, any later version. See the LICENSE.txt file for the text of |
| 7 | the license. |
| 8 | |
| 9 | Copyright (C) 2013 m h swende <martin at swende.se> |
| 10 | --]] |
| 11 | -- Loads the commands-library |
| 12 | local cmds = require('commands') |
| 13 | -- Load the default keys |
| 14 | local keys = require('mf_default_keys') |
| 15 | -- Ability to read what card is there |
| 16 | local reader = require('read14a') |
| 17 | |
| 18 | |
| 19 | local desc = |
| 20 | ("This script implements check keys. It utilises a large list of default keys (currently %d keys).\ |
| 21 | If you want to add more, just put them inside mf_default_keys.lua. "):format(#keys) |
| 22 | |
| 23 | local TIMEOUT = 10000 -- 10 seconds |
| 24 | |
| 25 | --[[This may be moved to a separate library at some point]] |
| 26 | local utils = |
| 27 | { |
| 28 | --- |
| 29 | -- Asks the user for Yes or No |
| 30 | confirm = function(message, ...) |
| 31 | local answer |
| 32 | message = message .. " [y]/[n] ?" |
| 33 | repeat |
| 34 | io.write(message) |
| 35 | io.flush() |
| 36 | answer=io.read() |
| 37 | if answer == 'Y' or answer == "y" then |
| 38 | return true |
| 39 | elseif answer == 'N' or answer == 'n' then |
| 40 | return false |
| 41 | end |
| 42 | until false |
| 43 | end, |
| 44 | --- |
| 45 | -- Asks the user for input |
| 46 | input = function (message , default) |
| 47 | local answer |
| 48 | if default ~= nil then |
| 49 | message = message .. " (default: ".. default.. " )" |
| 50 | end |
| 51 | message = message .." \n > " |
| 52 | io.write(message) |
| 53 | io.flush() |
| 54 | answer=io.read() |
| 55 | if answer == '' then answer = default end |
| 56 | |
| 57 | return answer |
| 58 | end, |
| 59 | } |
| 60 | |
| 61 | |
| 62 | local function checkCommand(command) |
| 63 | |
| 64 | --print("Sending this command : " .. tostring(command)) |
| 65 | local usbcommand = command:getBytes() |
| 66 | core.SendCommand(usbcommand) |
| 67 | local result = core.WaitForResponseTimeout(cmds.CMD_ACK,TIMEOUT) |
| 68 | if result then |
| 69 | local count,cmd,arg0 = bin.unpack('LL',result) |
| 70 | if(arg0==1) then |
| 71 | local count,arg1,arg2,data = bin.unpack('LLH511',result,count) |
| 72 | key = data:sub(1,12) |
| 73 | return key |
| 74 | else |
| 75 | --print("Key not found...") |
| 76 | return nil |
| 77 | end |
| 78 | else |
| 79 | print("Timeout while waiting for response. Increase TIMEOUT in keycheck.lua to wait longer") |
| 80 | return nil, "Timeout while waiting for device to respond" |
| 81 | end |
| 82 | end |
| 83 | |
| 84 | |
| 85 | function checkBlock(blockNo, keys, keyType) |
| 86 | -- The command data is only 512 bytes, each key is 6 bytes, meaning that we can send max 85 keys in one go. |
| 87 | -- If there's more, we need to split it up |
| 88 | local start, remaining= 1, #keys |
| 89 | local packets = {} |
| 90 | while remaining > 0 do |
| 91 | local n,data = remaining, nil |
| 92 | if remaining > 85 then n = 85 end |
| 93 | local data = table.concat(keys,"",start,n) |
| 94 | --print("data",data) |
| 95 | --print("data len", #data) |
| 96 | print(("Testing block %d, keytype %d, with %d keys"):format(blockNo, keyType, n)) |
| 97 | local command = Command:new{cmd = cmds.CMD_MIFARE_CHKKEYS, |
| 98 | arg1 = blockNo, |
| 99 | arg2 = keyType, |
| 100 | arg3 = n, |
| 101 | data = data} |
| 102 | local status = checkCommand(command) |
| 103 | if status then return status, blockNo end |
| 104 | start = start+n+1 |
| 105 | remaining = remaining - n |
| 106 | end |
| 107 | return nil |
| 108 | end |
| 109 | |
| 110 | -- A function to display the results |
| 111 | local function displayresults(results) |
| 112 | local sector, blockNo, keyA, keyB,_ |
| 113 | |
| 114 | print("________________________________________") |
| 115 | print("|Sector|Block| A | B |") |
| 116 | print("|--------------------------------------|") |
| 117 | |
| 118 | for sector,_ in pairs(results) do |
| 119 | blockNo, keyA, keyB = unpack(_) |
| 120 | |
| 121 | print(("| %3d | %3d |%s|%s|"):format(sector, blockNo, keyA, keyB )) |
| 122 | end |
| 123 | print("|--------------------------------------|") |
| 124 | |
| 125 | end |
| 126 | -- A little helper to place an item first in the list |
| 127 | local function placeFirst(akey, list) |
| 128 | akey = akey:lower() |
| 129 | if list[1] == akey then |
| 130 | -- Already at pole position |
| 131 | return list |
| 132 | end |
| 133 | local result = {akey} |
| 134 | --print(("Putting '%s' first"):format(akey)) |
| 135 | for i,v in ipairs(list) do |
| 136 | if v ~= akey then |
| 137 | result[#result+1] = v |
| 138 | end |
| 139 | end |
| 140 | return result |
| 141 | end |
| 142 | local function dumptofile(results) |
| 143 | local sector, blockNo, keyA, keyB,_ |
| 144 | |
| 145 | if utils.confirm("Do you wish to save the keys to dumpfile?") then |
| 146 | local destination = utils.input("Select a filename to store to", "dumpkeys.bin") |
| 147 | local file = io.open(destination, "w") |
| 148 | if file == nil then |
| 149 | print("Could not write to file ", destination) |
| 150 | return |
| 151 | end |
| 152 | |
| 153 | local key_a = "" |
| 154 | local key_b = "" |
| 155 | |
| 156 | for sector,_ in pairs(results) do |
| 157 | blockNo, keyA, keyB = unpack(_) |
| 158 | key_a = key_a .. bin.pack("H",keyA); |
| 159 | key_b = key_b .. bin.pack("H",keyB); |
| 160 | end |
| 161 | file:write(key_a) |
| 162 | file:write(key_b) |
| 163 | file:close() |
| 164 | end |
| 165 | end |
| 166 | |
| 167 | |
| 168 | local function main( args) |
| 169 | |
| 170 | print(desc); |
| 171 | |
| 172 | result, err = reader.read1443a() |
| 173 | if not result then |
| 174 | print(err) |
| 175 | return |
| 176 | end |
| 177 | print(("Found a %s tag"):format(result.name)) |
| 178 | |
| 179 | |
| 180 | core.clearCommandBuffer() |
| 181 | local blockNo |
| 182 | local keyType = 0 -- A=0, B=1 |
| 183 | local numSectors = 16 |
| 184 | |
| 185 | if 0x18 == result.sak then --NXP MIFARE Classic 4k | Plus 4k |
| 186 | -- IFARE Classic 4K offers 4096 bytes split into forty sectors, |
| 187 | -- of which 32 are same size as in the 1K with eight more that are quadruple size sectors. |
| 188 | numSectors = 40 |
| 189 | elseif 0x08 == result.sak then -- NXP MIFARE CLASSIC 1k | Plus 2k |
| 190 | -- 1K offers 1024 bytes of data storage, split into 16 sector |
| 191 | numSectors = 16 |
| 192 | elseif 0x09 == result.sak then -- NXP MIFARE Mini 0.3k |
| 193 | -- MIFARE Classic mini offers 320 bytes split into five sectors. |
| 194 | numSectors = 5 |
| 195 | elseif 0x10 == result.sak then-- "NXP MIFARE Plus 2k" |
| 196 | numSectors = 32 |
| 197 | else |
| 198 | print("I don't know how many sectors there are on this type of card, defaulting to 16") |
| 199 | end |
| 200 | |
| 201 | result = {} |
| 202 | for sector=1,numSectors,1 do |
| 203 | |
| 204 | --[[ |
| 205 | The mifare Classic 1k card has 16 sectors of 4 data blocks each. |
| 206 | The first 32 sectors of a mifare Classic 4k card consists of 4 data blocks and the remaining |
| 207 | 8 sectors consist of 16 data blocks. |
| 208 | --]] |
| 209 | local blockNo = sector * 4 -1 |
| 210 | |
| 211 | if sector > 32 then |
| 212 | blockNo = 32*4+ (sector-32)*16 -1 |
| 213 | end |
| 214 | |
| 215 | local keyA = checkBlock(blockNo, keys, 0) |
| 216 | if keyA then keys = placeFirst(keyA, keys) end |
| 217 | keyA = keyA or "" |
| 218 | |
| 219 | local keyB = checkBlock(blockNo, keys, 1) |
| 220 | if keyB then keys = placeFirst(keyB, keys) end |
| 221 | keyB = keyB or "" |
| 222 | |
| 223 | result[sector] = {blockNo, keyA, keyB } |
| 224 | |
| 225 | -- Check if user aborted |
| 226 | if core.ukbhit() then |
| 227 | print("Aborted by user") |
| 228 | break |
| 229 | end |
| 230 | end |
| 231 | displayresults(result) |
| 232 | dumptofile(result) |
| 233 | end |
| 234 | |
| 235 | main( args) |
| 236 | |