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pwgen-fsi-6x4dec.py
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pwgen-fsi-6x4dec.py
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#!/usr/bin/python
# Copyright 2009: dogbert <dogber1@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#
# This script generates master passwords which can be used to unlock
# the BIOS passwords of most Fujitsu Siemens laptops (Lifebook, Amilo etc.).
# You have to install python for running this script.
import os
# someone smacked his head onto the keyboard
XORkey = "<7#&9?>s"
def codeToBytes(code):
numbers = (int(code[0:5]), int(code[5:10]), int(code[10:15]), int(code[15:20]))
bytes = []
for i in numbers:
bytes.append(i % 256)
bytes.append(i / 256)
return bytes
def byteToChar(byte):
if byte > 9:
return chr(ord('a') + byte - 10)
else:
return chr(ord('0') + byte)
def decryptCode(bytes):
# swap two bytes
#bytes[2], bytes[6] = bytes[6], bytes[2]
#bytes[3], bytes[7] = bytes[7], bytes[3]
# interleave the nibbles
bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7] = ((bytes[3] & 0xF0) | (bytes[0] & 0x0F), (bytes[2] & 0xF0) | (bytes[1] & 0x0F), (bytes[5] & 0xF0) | (bytes[6] & 0x0F), (bytes[4] & 0xF0) | (bytes[7] & 0x0F), (bytes[7] & 0xF0) | (bytes[4] & 0x0F), (bytes[6] & 0xF0) | (bytes[5] & 0x0F), (bytes[1] & 0xF0) | (bytes[2] & 0x0F), (bytes[0] & 0xF0) | (bytes[3] & 0x0F))
# apply XOR key
for i in range(len(bytes)):
bytes[i] = bytes[i] ^ ord(XORkey[i])
# final rotations
bytes[0] = ((bytes[0] << 1) & 0xFF) | (bytes[0] >> 7)
bytes[1] = ((bytes[1] << 7) & 0xFF) | (bytes[1] >> 1)
bytes[2] = ((bytes[2] << 2) & 0xFF) | (bytes[2] >> 6)
bytes[3] = ((bytes[3] << 8) & 0xFF) | (bytes[3] >> 0)
bytes[4] = ((bytes[4] << 3) & 0xFF) | (bytes[4] >> 5)
bytes[5] = ((bytes[5] << 6) & 0xFF) | (bytes[5] >> 2)
bytes[6] = ((bytes[6] << 4) & 0xFF) | (bytes[6] >> 4)
bytes[7] = ((bytes[7] << 5) & 0xFF) | (bytes[7] >> 3)
# len(solution space) = 10+26
bytes = [x % 36 for x in bytes]
masterPwd = ""
for x in bytes:
masterPwd += byteToChar(x)
return masterPwd
print("Master Password Generator for FSI laptops (6x4 digits version)")
print("Copyright (C) 2013 dogbert <dogber1@gmail.com>")
print("")
print("When asked for a password, enter these:")
print("First password: 3hqgo3")
print("Second password: jqw534")
print("Third password: 0qww294e")
print("")
print("You will receive a hash code with five blocks, each with four numbers, ")
print("e.g. 1234-4321-1234-4321-1234")
print("")
print("Please enter the hash: ")
inHash = raw_input().strip().replace('-', '').replace(' ', '')
inHash = inHash[4:]
password = decryptCode(codeToBytes(inHash))
print("")
print("The master password is: " + password)
print("")
print("Please note that the password is encoded for US QWERTY keyboard layouts.")
if (os.name == 'nt'):
print("Press a key to exit...")
raw_input()