277 lines
11 KiB
Python
277 lines
11 KiB
Python
#!/usr/bin/env python
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#
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# hash generation library for rePear, the iPod database management tool
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# Copyright (C) 2008 Martin J. Fiedler <martin.fiedler@gmx.net>
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# based on original code by William Whistler (wtbw)
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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import os, re, hashlib
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try:
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import winreg
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HaveWin32 = True
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except ImportError:
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HaveWin32 = False
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def GetFWIDs_Win32():
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# phase 1: enumerate all mass storage devices
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if not HaveWin32: return []
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try:
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key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, "SYSTEM\\CurrentControlSet\\Services\\Disk\\Enum", 0, winreg.KEY_QUERY_VALUE)
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except:
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raise
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return []
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devs = []
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devid = 0
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try:
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while True:
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dev = winreg.QueryValueEx(key, str(devid))[0]
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devs.append(dev.upper())
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devid += 1
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except:
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pass
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key.Close()
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# phase 2: find iPods and their FWIDs there (I'm being very careful here)
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fwids = []
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for dev in devs:
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dev = dev.upper().replace("\\", "&").split("&")
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info = dict([x.split('_', 1) for x in dev if '_' in x])
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vendor = info.get('VEN', None) or info.get('VID', None)
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product = info.get('DEV', None) or info.get('PROD', None) or info.get('PID', None)
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if not(vendor in ('APPLE', '05AC')): continue
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if product and (product != 'IPOD') and not(product[:2] in ('12', '13')): continue
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fwid = dev[-2].upper()
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for item in dev:
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if item.startswith("000A27"): fwid = item
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if len(fwid) == 16: fwids.append(fwid)
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return fwids
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def GetFWIDs_Linux26():
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LINUX_DEVDIR_BASE = "/sys/bus/usb/devices"
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try:
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devs = os.listdir(LINUX_DEVDIR_BASE)
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except OSError:
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return []
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def sysfile(filename):
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try:
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f = open(os.path.join(devdir, filename), "rb")
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data = f.read()
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f.close()
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return data.split(b"\0", 1)[0].strip().upper()
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except IOError:
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return ""
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fwids = []
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re_devdir = re.compile(r'^\d+-\d+$')
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for dev in devs:
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if not re_devdir.match(dev): continue
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devdir = os.path.join(LINUX_DEVDIR_BASE, dev)
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if not os.path.isdir(devdir): continue
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if not((sysfile("idVendor") == "05AC") \
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or (sysfile("manufacturer") == "APPLE")): continue
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if not((sysfile("idProduct")[:2] in ("12", "13")) \
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or (sysfile("product") == "IPOD")): continue
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fwid = sysfile("serial")
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if fwid and fwid.startswith(b"000A27"):
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fwids.append(fwid)
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return fwids
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re_ioreg = re.compile(r'"(.*?)"\s+=\s+"?(.*?)"?$')
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def GetFWIDs_Darwin():
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devs = []
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try:
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f = os.popen("/usr/sbin/ioreg -l", 'r')
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valid = False
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for line in f:
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line = line.strip("\r\n\t |+-")
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if not line:
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continue
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if line.startswith('o'):
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valid = (line[1:].strip().split()[0].split('@', 1)[0] == "iPod")
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elif valid and line.startswith('"'):
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m = re_ioreg.match(line)
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if m:
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key, value = m.groups()
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if (key.lower() == "usb serial number") and (len(value) == 16):
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devs.append(value.upper())
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f.close()
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except (OSError, IOError, EOFError):
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pass
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return devs
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def GetFWIDs():
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if os.name == 'nt':
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return GetFWIDs_Win32()
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elif os.name == 'posix':
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try:
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uname = os.uname()[0].lower()
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except (AttributeError, OSError):
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return []
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if uname == 'linux':
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return GetFWIDs_Linux26()
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elif uname == 'darwin':
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return GetFWIDs_Darwin()
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return []
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################################################################################
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inv = [
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0x74, 0x85, 0x96, 0xA7, 0xB8, 0xC9, 0xDA, 0xEB, 0xFC, 0x0D, 0x1E, 0x2F, 0x40, 0x51, 0x62, 0x73,
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0x84, 0x95, 0xA6, 0xB7, 0xC8, 0xD9, 0xEA, 0xFB, 0x0C, 0x1D, 0x2E, 0x3F, 0x50, 0x61, 0x72, 0x83,
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0x94, 0xA5, 0xB6, 0xC7, 0xD8, 0xE9, 0xFA, 0x0B, 0x1C, 0x2D, 0x3E, 0x4F, 0x60, 0x71, 0x82, 0x93,
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0xA4, 0xB5, 0xC6, 0xD7, 0xE8, 0xF9, 0x0A, 0x1B, 0x2C, 0x3D, 0x4E, 0x5F, 0x70, 0x81, 0x92, 0xA3,
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0xB4, 0xC5, 0xD6, 0xE7, 0xF8, 0x09, 0x1A, 0x2B, 0x3C, 0x4D, 0x5E, 0x6F, 0x80, 0x91, 0xA2, 0xB3,
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0xC4, 0xD5, 0xE6, 0xF7, 0x08, 0x19, 0x2A, 0x3B, 0x4C, 0x5D, 0x6E, 0x7F, 0x90, 0xA1, 0xB2, 0xC3,
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0xD4, 0xE5, 0xF6, 0x07, 0x18, 0x29, 0x3A, 0x4B, 0x5C, 0x6D, 0x7E, 0x8F, 0xA0, 0xB1, 0xC2, 0xD3,
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0xE4, 0xF5, 0x06, 0x17, 0x28, 0x39, 0x4A, 0x5B, 0x6C, 0x7D, 0x8E, 0x9F, 0xB0, 0xC1, 0xD2, 0xE3,
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0xF4, 0x05, 0x16, 0x27, 0x38, 0x49, 0x5A, 0x6B, 0x7C, 0x8D, 0x9E, 0xAF, 0xC0, 0xD1, 0xE2, 0xF3,
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0x04, 0x15, 0x26, 0x37, 0x48, 0x59, 0x6A, 0x7B, 0x8C, 0x9D, 0xAE, 0xBF, 0xD0, 0xE1, 0xF2, 0x03,
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0x14, 0x25, 0x36, 0x47, 0x58, 0x69, 0x7A, 0x8B, 0x9C, 0xAD, 0xBE, 0xCF, 0xE0, 0xF1, 0x02, 0x13,
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0x24, 0x35, 0x46, 0x57, 0x68, 0x79, 0x8A, 0x9B, 0xAC, 0xBD, 0xCE, 0xDF, 0xF0, 0x01, 0x12, 0x23,
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0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0x9A, 0xAB, 0xBC, 0xCD, 0xDE, 0xEF, 0x00, 0x11, 0x22, 0x33,
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0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF, 0x10, 0x21, 0x32, 0x43,
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0x54, 0x65, 0x76, 0x87, 0x98, 0xA9, 0xBA, 0xCB, 0xDC, 0xED, 0xFE, 0x0F, 0x20, 0x31, 0x42, 0x53,
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0x64, 0x75, 0x86, 0x97, 0xA8, 0xB9, 0xCA, 0xDB, 0xEC, 0xFD, 0x0E, 0x1F, 0x30, 0x41, 0x52, 0x63
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]
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table1 = [
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0x3A, 0x3F, 0x3E, 0x72, 0xBD, 0xA2, 0xD6, 0xB4, 0x63, 0xC0, 0x6E, 0x62, 0x59, 0x1E, 0xE2, 0x71,
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0xB5, 0x0D, 0xE8, 0x0C, 0x25, 0x38, 0xCE, 0x23, 0x7C, 0xB7, 0xAD, 0x16, 0xDF, 0x47, 0x3D, 0xB3,
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0x7E, 0x8C, 0xAA, 0x61, 0x31, 0x66, 0xBE, 0x4F, 0x97, 0x14, 0x54, 0xF0, 0x70, 0xEB, 0x30, 0xC4,
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0x27, 0x4E, 0xFA, 0x1A, 0x2B, 0x11, 0xF4, 0x45, 0x8E, 0x5D, 0x73, 0xED, 0x22, 0x2E, 0x7D, 0xA4,
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0x28, 0xDA, 0x2F, 0xC5, 0x92, 0x09, 0x05, 0x13, 0x9D, 0x32, 0x51, 0x4A, 0xC8, 0xBA, 0x96, 0xA7,
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0x6A, 0x50, 0xF3, 0xBC, 0x93, 0xBF, 0xB0, 0xD2, 0xD5, 0x82, 0x19, 0x98, 0x35, 0xCF, 0x6B, 0xB6,
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0x83, 0x56, 0x15, 0xF2, 0x9A, 0x9C, 0xCA, 0x74, 0x34, 0x58, 0x8D, 0xA6, 0x03, 0xFF, 0x46, 0x7B,
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0xD0, 0x7A, 0x33, 0x76, 0xDD, 0xAC, 0xCB, 0x24, 0x7F, 0xB1, 0x85, 0x60, 0xC3, 0x26, 0x8A, 0x1D,
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0x1C, 0x8F, 0x2A, 0xEF, 0x06, 0xDE, 0x67, 0x5E, 0xE7, 0xAE, 0xD9, 0xCC, 0x07, 0x6C, 0xF8, 0x0A,
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0xD3, 0x40, 0x36, 0x1F, 0x2D, 0x95, 0x43, 0xDB, 0x01, 0x89, 0x4B, 0xF7, 0xB9, 0x39, 0xC2, 0x52,
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0x53, 0xFD, 0x65, 0xF5, 0x68, 0xC1, 0xC7, 0x9F, 0x4D, 0xEA, 0xAF, 0x6D, 0x10, 0x44, 0x87, 0xD8,
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0xEE, 0x1B, 0xFE, 0x3C, 0xDC, 0x84, 0x69, 0x48, 0x6F, 0xD1, 0x57, 0x55, 0xD4, 0xA5, 0x49, 0x5B,
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0xE5, 0x0B, 0x94, 0xC9, 0x5F, 0xE1, 0x17, 0x81, 0xBB, 0xEC, 0xD7, 0xC6, 0x02, 0x4C, 0x42, 0x75,
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0xA3, 0x99, 0xE4, 0xA1, 0x9B, 0x5A, 0xF1, 0x29, 0xA0, 0x64, 0x9E, 0x18, 0x41, 0x80, 0x2C, 0x79,
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0x20, 0x8B, 0xAB, 0x90, 0x08, 0xB8, 0xA9, 0x77, 0x12, 0xF9, 0x0E, 0x88, 0xE9, 0x04, 0xFB, 0x86,
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0x0F, 0xE0, 0xA8, 0x5C, 0xE6, 0x21, 0xCD, 0x3B, 0x00, 0x78, 0xFC, 0xF6, 0xE3, 0x37, 0xB2, 0x91
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]
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table2 = [
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0xF3, 0xE4, 0x1B, 0x38, 0xE5, 0x6F, 0xE8, 0x9D, 0x3E, 0x55, 0xBA, 0xC7, 0xAC, 0xEA, 0x66, 0xA2,
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0xB9, 0x7A, 0x34, 0x43, 0x02, 0x4E, 0xFE, 0x36, 0x41, 0x57, 0x1A, 0xB1, 0x31, 0x87, 0x04, 0x52,
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0x21, 0x22, 0xE1, 0x13, 0x7F, 0x03, 0x3A, 0x90, 0xF7, 0x69, 0x78, 0x12, 0x83, 0x0B, 0x9A, 0x97,
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0x4D, 0xB7, 0x8C, 0xBF, 0x2D, 0x94, 0xD1, 0x93, 0x2F, 0x42, 0x23, 0xA4, 0xE0, 0x92, 0xDC, 0x68,
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0xD3, 0xDD, 0xAF, 0x91, 0x9F, 0xED, 0x3D, 0x8F, 0xA1, 0x51, 0xD9, 0xE9, 0x70, 0x28, 0xEF, 0xB3,
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0x49, 0xA5, 0x0D, 0xC5, 0xD0, 0x60, 0xB4, 0x2B, 0x07, 0xF8, 0xDF, 0xE6, 0x16, 0xC0, 0x30, 0x71,
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0x85, 0xFD, 0x72, 0x95, 0x29, 0x79, 0x0A, 0x7B, 0x46, 0x11, 0x7D, 0x88, 0x1D, 0x2A, 0x48, 0x1F,
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0x45, 0x89, 0x47, 0xEE, 0xBB, 0xBE, 0x6E, 0xC3, 0x6C, 0xCE, 0x10, 0x5A, 0x2C, 0xCA, 0xFB, 0xB2,
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0xCB, 0x1C, 0x9C, 0xEC, 0x2E, 0x56, 0x59, 0x9B, 0xA6, 0x53, 0xAE, 0x17, 0x25, 0xC1, 0x3F, 0x6A,
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0x0F, 0x09, 0x01, 0xA3, 0xD6, 0xA0, 0xD8, 0x08, 0xE3, 0x74, 0x06, 0x6D, 0x19, 0x98, 0x1E, 0x77,
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0x76, 0xBC, 0xEB, 0x3C, 0xB0, 0xC4, 0xC8, 0x64, 0x0E, 0x86, 0x63, 0xD7, 0xDB, 0xBD, 0xA7, 0x82,
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0x39, 0x4F, 0x27, 0xD2, 0x5F, 0x73, 0xF4, 0x75, 0x6B, 0xC2, 0xD5, 0x67, 0x5D, 0x80, 0xAB, 0x81,
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0xDE, 0xF0, 0xAD, 0xAA, 0xCD, 0xB6, 0xF6, 0x7C, 0xFC, 0x33, 0x05, 0x14, 0x96, 0x15, 0xC9, 0x9E,
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0x35, 0x5C, 0x7E, 0x44, 0x54, 0x58, 0x3B, 0x40, 0x20, 0xA8, 0x8B, 0x5E, 0x4A, 0x24, 0x99, 0x8E,
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0xF5, 0xB5, 0x62, 0x00, 0x37, 0x5B, 0x18, 0x65, 0x8D, 0x32, 0xE2, 0xF9, 0xDA, 0x8A, 0xD4, 0xCC,
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0x26, 0xF2, 0xF1, 0xE7, 0x4B, 0xC6, 0xCF, 0xFF, 0x4C, 0x84, 0x61, 0xFA, 0xB8, 0x0C, 0xA9, 0x50
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]
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fixed = [
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0x67, 0x23, 0xFE, 0x30, 0x45, 0x33, 0xF8, 0x90, 0x99, 0x21, 0x07, 0xC1, 0xD0, 0x12, 0xB2, 0xA1, 0x07, 0x81
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]
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def gcd(a, b):
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while b > 0:
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a, b = b, a % b
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return a
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def lcm(a, b):
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if not(a) or not(b):
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return 1
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return a * b / gcd(a, b)
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def UpdateHash(db, fwid):
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# extract dbid, zero out all hash stuff and add hash indicator
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dbid = db[24:32]
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hash2 = db[50:70]
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z = 20 * b"\0"
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db = db[:24] + (8 * b"\0") + db[32:48] + b"\x01\x00" + z + db[70:88] + z + db[108:]
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# convert fwid to byte array
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fwid = [int(fwid[i:i+2], 16) for i in range(0, 16, 2)]
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# key generation, step 1: take LCM of each two bytes in the FWID in turn
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key = 16 * [0]
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for i in (0, 2, 4, 6):
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l = int(lcm(*fwid[i:i+2]))
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hi = (l & 0xFF00) >> 8
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lo = l & 0x00FF
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j = i << 1
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key[j] = ((table1[hi] * 0xB5) - 0x03) & 0xFF
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key[j|1] = ((table2[hi] * 0xB7) + 0x49) & 0xFF
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key[j|2] = ((table1[lo] * 0xB5) - 0x03) & 0xFF
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key[j|3] = ((table2[lo] * 0xB7) + 0x49) & 0xFF
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# step 2: invert key
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key = [inv[x] for x in key]
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# step 3: create hash key
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key = fixed + key
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key = list(hashlib.sha1(bytes(key)).digest())
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# first XOR
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key = [(x ^ 0x36) for x in key] + 44 * [0x36]
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# first SHA
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h = hashlib.sha1(bytes(key) + db).digest()
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# second XOR
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key = [(x ^ (0x36 ^ 0x5C)) for x in key]
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# second SHA
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h = hashlib.sha1(bytes(key) + h).digest()
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# reassemble database
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return db[:24] + dbid + db[32:50] + hash2 + db[70:88] + h + db[108:]
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################################################################################
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if __name__ == "__main__":
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import sys
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fwids = GetFWIDs()
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print("detected FWIDs:", fwids)
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if fwids:
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fwid = fwids[0]
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else:
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fwid = "000A27001B3EAD37"
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print("no FWID detected, using default FWID for BIST")
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try:
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old = open(sys.argv[1], "rb").read()
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except IndexError:
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sys.exit(0)
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new = UpdateHash(old, "000A27001B3EAD37")
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print("old =>", " ".join(["%02X" % c for c in old[88:108]]))
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print("new =>", " ".join(["%02X" % c for c in new[88:108]]))
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if old == new:
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print("MATCH!")
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else:
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print("no match :(")
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try:
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open(sys.argv[2], "wb").write(new)
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except IndexError:
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pass
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