proxmark3/client/scripts/read_pwd_mem.lua

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local getopt = require('getopt')
local bin = require('bin')
copyright = 'Copyright (c) 2018 Bogito. All rights reserved.'
author = "Bogito"
version = 'v1.0.1'
desc =
[[
This script will read the flash memory of RDV4 and print the stored passwords.
It was meant to be used as a help tool after using the BogRun standalone mode.
(Iceman) script adapted to read and print keys in the default dictionary flashmemory sections.
]]
usage =
[[
Usage:
script run read_pwd_mem -h -o <offset> -l <length> -k <keylength>
Arguments:
-h : this help
-o <offset> : memory offset, default is 0
-l <length> : length in bytes, default is 256
-k <keylen> : key length in bytes <4|6|8> , default is 4
-m : print Mifare dictionary keys
-t : print t55xx dictionary passwords
-i : print iClass dictionary keys
]]
example =
[[
-- This will scan the first 256 bytes of flash memory for stored passwords
script run read_pwd_mem
-- This will scan 256 bytes of flash memory at offset 64 for stored passwords
script run read_pwd_mem -o 64
-- This will scan 32 bytes of flash memory at offset 64 for stored passwords
script run read_pwd_mem -o 64 -l 32
-- This will print found
script run read_pwd_mem -o 241664 -k 6
]]
---
-- This is only meant to be used when errors occur
local function oops(err)
print("ERROR: ", err)
return nil, err
end
---
-- Usage help
local function help()
print(copyright)
print(version)
print(desc)
print(usage)
print('Example usage:')
print(example)
end
---
-- The main entry point
local function main(args)
print( string.rep('--',20) )
print( string.rep('--',20) )
print()
local data, err, quadlet
local cnt = 0
local offset = 0
local length = 256
local keylength = 4
local usedkey = false
for o, a in getopt.getopt(args, 'ho:l:k:mti') do
-- help
if o == "h" then return help() end
-- offset
if o == "o" then offset = tonumber(a) end
-- num of bytes to read
if o == "l" then length = tonumber(a) end
-- keylength
if o == "k" then keylength = tonumber(a); usedkey = true end
if o == "m" then keylength =6; usedkey = true; offset = 0x3F000-0x4000; end
if o == "t" then keylength =4; usedkey = true; offset = 0x3F000-0x3000; end
if o == "i" then keylength =8; usedkey = true; offset = 0x3F000-0x5000; end
end
if length < 0 or length > 256 then
return oops('Error: Length is not valid. Must be less than 256')
end
if (offset < 0) or (offset % 4 ~= 0) then
return oops('Error: Offset is not valid. Mod-4 values are only allowed.')
end
print('Memory offset', offset)
print('Length ', length)
print('Key length ', keylength)
print( string.rep('--',20) )
if usedkey then length = 4096 end
data, err = core.GetFromFlashMem(offset, length)
if err then return oops(err) end
if usedkey then
_, keys, s = bin.unpack('SH'..length-2, data)
if keys == 0xFFFF then return "No keys found in section" end
local kl = keylength * 2
for i = 1, keys do
key = string.sub(s, (i - 1) * kl + 1, i * kl )
print(string.format("[%02d] %s",i, key))
end
print( string.rep('--',20) )
print( ('[+] found %d passwords'):format(keys))
else
_, s = bin.unpack('H'..length, data)
local cnt = 0, i
for i = 1, (length/keylength) do
key = string.sub(s, (i-1)*8+1, i*8)
if key == "FFFFFFFF" then break end
print(string.format("[%02d] %s",i, key))
cnt = cnt + 1
end
print( string.rep('--',20) )
print( ('[+] found %d passwords'):format(cnt))
end
print( string.rep('--',20) )
end
main(args)