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hash58.py
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#!/usr/bin/env python
#
# hash generation library for rePear, the iPod database management tool
# Copyright (C) 2008 Martin J. Fiedler <[email protected]>
# based on original code by William Whistler (wtbw)
#
# 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
import os, types, re, sha
try:
import _winreg
HaveWin32 = True
except ImportError:
HaveWin32 = False
def GetFWIDs_Win32():
# phase 1: enumerate all mass storage devices
if not HaveWin32: return []
try:
key = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, "SYSTEM\\CurrentControlSet\\Services\\Disk\\Enum", 0, _winreg.KEY_QUERY_VALUE)
except:
raise
return []
devs = []
devid = 0
try:
while True:
dev = _winreg.QueryValueEx(key, str(devid))[0]
if type(dev) == types.UnicodeType:
dev = dev.encode('ascii', 'replace')
devs.append(dev.upper())
devid += 1
except:
pass
key.Close()
# phase 2: find iPods and their FWIDs there (I'm being very careful here)
fwids = []
for dev in devs:
dev = dev.upper().replace("\\", "&").split("&")
info = dict([x.split('_', 1) for x in dev if '_' in x])
vendor = info.get('VEN', None) or info.get('VID', None)
product = info.get('DEV', None) or info.get('PROD', None) or info.get('PID', None)
if not(vendor in ('APPLE', '05AC')): continue
if (product != 'IPOD') and not(product[:2] in ('12', '13')): continue
fwid = dev[-2].upper()
for item in dev:
if item.startswith("000A27"): fwid = item
if len(fwid) == 16: fwids.append(fwid)
return fwids
def GetFWIDs_Linux26():
LINUX_DEVDIR_BASE = "/sys/bus/usb/devices"
try:
devs = os.listdir(LINUX_DEVDIR_BASE)
except OSError:
return []
def sysfile(filename):
try:
f = open(os.path.join(devdir, filename), "rb")
data = f.read()
f.close()
return data.split("\0", 1)[0].strip().upper()
except IOError:
return ""
fwids = []
re_devdir = re.compile(r'^\d+-\d+$')
for dev in devs:
if not re_devdir.match(dev): continue
devdir = os.path.join(LINUX_DEVDIR_BASE, dev)
if not os.path.isdir(devdir): continue
if not((sysfile("idVendor") == "05AC") \
or (sysfile("manufacturer") == "APPLE")): continue
if not((sysfile("idProduct")[:2] in ("12", "13")) \
or (sysfile("product") == "IPOD")): continue
fwid = sysfile("serial")
if fwid.startswith("000A27"):
fwids.append(fwid)
return fwids
re_ioreg = re.compile(r'"(.*?)"\s+=\s+"?(.*?)"?$')
def GetFWIDs_Darwin():
devs = []
try:
f = os.popen("/usr/sbin/ioreg -l", 'r')
valid = False
for line in f:
line = line.strip("\r\n\t |+-")
if not line:
continue
if line.startswith('o'):
valid = (line[1:].strip().split()[0].split('@', 1)[0] == "iPod")
elif valid and line.startswith('"'):
m = re_ioreg.match(line)
if m:
key, value = m.groups()
if (key.lower() == "usb serial number") and (len(value) == 16):
devs.append(value.upper())
f.close()
except (OSError, IOError, EOFError):
pass
return devs
def GetFWIDs():
if os.name == 'nt':
return GetFWIDs_Win32()
elif os.name == 'posix':
try:
uname = os.uname()[0].lower()
except (AttributeError, OSError):
return []
if uname == 'linux':
return GetFWIDs_Linux26()
elif uname == 'darwin':
return GetFWIDs_Darwin()
return []
################################################################################
inv = [
0x74, 0x85, 0x96, 0xA7, 0xB8, 0xC9, 0xDA, 0xEB, 0xFC, 0x0D, 0x1E, 0x2F, 0x40, 0x51, 0x62, 0x73,
0x84, 0x95, 0xA6, 0xB7, 0xC8, 0xD9, 0xEA, 0xFB, 0x0C, 0x1D, 0x2E, 0x3F, 0x50, 0x61, 0x72, 0x83,
0x94, 0xA5, 0xB6, 0xC7, 0xD8, 0xE9, 0xFA, 0x0B, 0x1C, 0x2D, 0x3E, 0x4F, 0x60, 0x71, 0x82, 0x93,
0xA4, 0xB5, 0xC6, 0xD7, 0xE8, 0xF9, 0x0A, 0x1B, 0x2C, 0x3D, 0x4E, 0x5F, 0x70, 0x81, 0x92, 0xA3,
0xB4, 0xC5, 0xD6, 0xE7, 0xF8, 0x09, 0x1A, 0x2B, 0x3C, 0x4D, 0x5E, 0x6F, 0x80, 0x91, 0xA2, 0xB3,
0xC4, 0xD5, 0xE6, 0xF7, 0x08, 0x19, 0x2A, 0x3B, 0x4C, 0x5D, 0x6E, 0x7F, 0x90, 0xA1, 0xB2, 0xC3,
0xD4, 0xE5, 0xF6, 0x07, 0x18, 0x29, 0x3A, 0x4B, 0x5C, 0x6D, 0x7E, 0x8F, 0xA0, 0xB1, 0xC2, 0xD3,
0xE4, 0xF5, 0x06, 0x17, 0x28, 0x39, 0x4A, 0x5B, 0x6C, 0x7D, 0x8E, 0x9F, 0xB0, 0xC1, 0xD2, 0xE3,
0xF4, 0x05, 0x16, 0x27, 0x38, 0x49, 0x5A, 0x6B, 0x7C, 0x8D, 0x9E, 0xAF, 0xC0, 0xD1, 0xE2, 0xF3,
0x04, 0x15, 0x26, 0x37, 0x48, 0x59, 0x6A, 0x7B, 0x8C, 0x9D, 0xAE, 0xBF, 0xD0, 0xE1, 0xF2, 0x03,
0x14, 0x25, 0x36, 0x47, 0x58, 0x69, 0x7A, 0x8B, 0x9C, 0xAD, 0xBE, 0xCF, 0xE0, 0xF1, 0x02, 0x13,
0x24, 0x35, 0x46, 0x57, 0x68, 0x79, 0x8A, 0x9B, 0xAC, 0xBD, 0xCE, 0xDF, 0xF0, 0x01, 0x12, 0x23,
0x34, 0x45, 0x56, 0x67, 0x78, 0x89, 0x9A, 0xAB, 0xBC, 0xCD, 0xDE, 0xEF, 0x00, 0x11, 0x22, 0x33,
0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF, 0x10, 0x21, 0x32, 0x43,
0x54, 0x65, 0x76, 0x87, 0x98, 0xA9, 0xBA, 0xCB, 0xDC, 0xED, 0xFE, 0x0F, 0x20, 0x31, 0x42, 0x53,
0x64, 0x75, 0x86, 0x97, 0xA8, 0xB9, 0xCA, 0xDB, 0xEC, 0xFD, 0x0E, 0x1F, 0x30, 0x41, 0x52, 0x63
]
table1 = [
0x3A, 0x3F, 0x3E, 0x72, 0xBD, 0xA2, 0xD6, 0xB4, 0x63, 0xC0, 0x6E, 0x62, 0x59, 0x1E, 0xE2, 0x71,
0xB5, 0x0D, 0xE8, 0x0C, 0x25, 0x38, 0xCE, 0x23, 0x7C, 0xB7, 0xAD, 0x16, 0xDF, 0x47, 0x3D, 0xB3,
0x7E, 0x8C, 0xAA, 0x61, 0x31, 0x66, 0xBE, 0x4F, 0x97, 0x14, 0x54, 0xF0, 0x70, 0xEB, 0x30, 0xC4,
0x27, 0x4E, 0xFA, 0x1A, 0x2B, 0x11, 0xF4, 0x45, 0x8E, 0x5D, 0x73, 0xED, 0x22, 0x2E, 0x7D, 0xA4,
0x28, 0xDA, 0x2F, 0xC5, 0x92, 0x09, 0x05, 0x13, 0x9D, 0x32, 0x51, 0x4A, 0xC8, 0xBA, 0x96, 0xA7,
0x6A, 0x50, 0xF3, 0xBC, 0x93, 0xBF, 0xB0, 0xD2, 0xD5, 0x82, 0x19, 0x98, 0x35, 0xCF, 0x6B, 0xB6,
0x83, 0x56, 0x15, 0xF2, 0x9A, 0x9C, 0xCA, 0x74, 0x34, 0x58, 0x8D, 0xA6, 0x03, 0xFF, 0x46, 0x7B,
0xD0, 0x7A, 0x33, 0x76, 0xDD, 0xAC, 0xCB, 0x24, 0x7F, 0xB1, 0x85, 0x60, 0xC3, 0x26, 0x8A, 0x1D,
0x1C, 0x8F, 0x2A, 0xEF, 0x06, 0xDE, 0x67, 0x5E, 0xE7, 0xAE, 0xD9, 0xCC, 0x07, 0x6C, 0xF8, 0x0A,
0xD3, 0x40, 0x36, 0x1F, 0x2D, 0x95, 0x43, 0xDB, 0x01, 0x89, 0x4B, 0xF7, 0xB9, 0x39, 0xC2, 0x52,
0x53, 0xFD, 0x65, 0xF5, 0x68, 0xC1, 0xC7, 0x9F, 0x4D, 0xEA, 0xAF, 0x6D, 0x10, 0x44, 0x87, 0xD8,
0xEE, 0x1B, 0xFE, 0x3C, 0xDC, 0x84, 0x69, 0x48, 0x6F, 0xD1, 0x57, 0x55, 0xD4, 0xA5, 0x49, 0x5B,
0xE5, 0x0B, 0x94, 0xC9, 0x5F, 0xE1, 0x17, 0x81, 0xBB, 0xEC, 0xD7, 0xC6, 0x02, 0x4C, 0x42, 0x75,
0xA3, 0x99, 0xE4, 0xA1, 0x9B, 0x5A, 0xF1, 0x29, 0xA0, 0x64, 0x9E, 0x18, 0x41, 0x80, 0x2C, 0x79,
0x20, 0x8B, 0xAB, 0x90, 0x08, 0xB8, 0xA9, 0x77, 0x12, 0xF9, 0x0E, 0x88, 0xE9, 0x04, 0xFB, 0x86,
0x0F, 0xE0, 0xA8, 0x5C, 0xE6, 0x21, 0xCD, 0x3B, 0x00, 0x78, 0xFC, 0xF6, 0xE3, 0x37, 0xB2, 0x91
]
table2 = [
0xF3, 0xE4, 0x1B, 0x38, 0xE5, 0x6F, 0xE8, 0x9D, 0x3E, 0x55, 0xBA, 0xC7, 0xAC, 0xEA, 0x66, 0xA2,
0xB9, 0x7A, 0x34, 0x43, 0x02, 0x4E, 0xFE, 0x36, 0x41, 0x57, 0x1A, 0xB1, 0x31, 0x87, 0x04, 0x52,
0x21, 0x22, 0xE1, 0x13, 0x7F, 0x03, 0x3A, 0x90, 0xF7, 0x69, 0x78, 0x12, 0x83, 0x0B, 0x9A, 0x97,
0x4D, 0xB7, 0x8C, 0xBF, 0x2D, 0x94, 0xD1, 0x93, 0x2F, 0x42, 0x23, 0xA4, 0xE0, 0x92, 0xDC, 0x68,
0xD3, 0xDD, 0xAF, 0x91, 0x9F, 0xED, 0x3D, 0x8F, 0xA1, 0x51, 0xD9, 0xE9, 0x70, 0x28, 0xEF, 0xB3,
0x49, 0xA5, 0x0D, 0xC5, 0xD0, 0x60, 0xB4, 0x2B, 0x07, 0xF8, 0xDF, 0xE6, 0x16, 0xC0, 0x30, 0x71,
0x85, 0xFD, 0x72, 0x95, 0x29, 0x79, 0x0A, 0x7B, 0x46, 0x11, 0x7D, 0x88, 0x1D, 0x2A, 0x48, 0x1F,
0x45, 0x89, 0x47, 0xEE, 0xBB, 0xBE, 0x6E, 0xC3, 0x6C, 0xCE, 0x10, 0x5A, 0x2C, 0xCA, 0xFB, 0xB2,
0xCB, 0x1C, 0x9C, 0xEC, 0x2E, 0x56, 0x59, 0x9B, 0xA6, 0x53, 0xAE, 0x17, 0x25, 0xC1, 0x3F, 0x6A,
0x0F, 0x09, 0x01, 0xA3, 0xD6, 0xA0, 0xD8, 0x08, 0xE3, 0x74, 0x06, 0x6D, 0x19, 0x98, 0x1E, 0x77,
0x76, 0xBC, 0xEB, 0x3C, 0xB0, 0xC4, 0xC8, 0x64, 0x0E, 0x86, 0x63, 0xD7, 0xDB, 0xBD, 0xA7, 0x82,
0x39, 0x4F, 0x27, 0xD2, 0x5F, 0x73, 0xF4, 0x75, 0x6B, 0xC2, 0xD5, 0x67, 0x5D, 0x80, 0xAB, 0x81,
0xDE, 0xF0, 0xAD, 0xAA, 0xCD, 0xB6, 0xF6, 0x7C, 0xFC, 0x33, 0x05, 0x14, 0x96, 0x15, 0xC9, 0x9E,
0x35, 0x5C, 0x7E, 0x44, 0x54, 0x58, 0x3B, 0x40, 0x20, 0xA8, 0x8B, 0x5E, 0x4A, 0x24, 0x99, 0x8E,
0xF5, 0xB5, 0x62, 0x00, 0x37, 0x5B, 0x18, 0x65, 0x8D, 0x32, 0xE2, 0xF9, 0xDA, 0x8A, 0xD4, 0xCC,
0x26, 0xF2, 0xF1, 0xE7, 0x4B, 0xC6, 0xCF, 0xFF, 0x4C, 0x84, 0x61, 0xFA, 0xB8, 0x0C, 0xA9, 0x50
]
fixed = [
0x67, 0x23, 0xFE, 0x30, 0x45, 0x33, 0xF8, 0x90, 0x99, 0x21, 0x07, 0xC1, 0xD0, 0x12, 0xB2, 0xA1, 0x07, 0x81
]
def gcd(a, b):
while b > 0:
a, b = b, a % b
return a
def lcm(a, b):
if not(a) or not(b):
return 1
return a * b / gcd(a, b)
def UpdateHash(db, fwid):
# extract dbid, zero out all hash stuff and add hash indicator
dbid = db[24:32]
hash2 = db[50:70]
z = 20 * "\0"
db = db[:24] + (8 * "\0") + db[32:48] + "\x01\x00" + z + db[70:88] + z + db[108:]
# convert fwid to byte array
fwid = [int(fwid[i:i+2], 16) for i in xrange(0, 16, 2)]
# key generation, step 1: take LCM of each two bytes in the FWID in turn
key = 16 * [0]
for i in (0, 2, 4, 6):
l = lcm(*fwid[i:i+2])
hi = (l & 0xFF00) >> 8
lo = l & 0x00FF
j = i << 1
key[j] = ((table1[hi] * 0xB5) - 0x03) & 0xFF
key[j|1] = ((table2[hi] * 0xB7) + 0x49) & 0xFF
key[j|2] = ((table1[lo] * 0xB5) - 0x03) & 0xFF
key[j|3] = ((table2[lo] * 0xB7) + 0x49) & 0xFF
# step 2: invert key
key = [inv[x] for x in key]
# step 3: create hash key
key = fixed + key
key = map(ord, sha.new("".join(map(chr, key))).digest())
# first XOR
key = [(x ^ 0x36) for x in key] + 44 * [0x36]
# first SHA
h = sha.new("".join(map(chr, key)) + db).digest()
# second XOR
key = [(x ^ (0x36 ^ 0x5C)) for x in key]
# second SHA
h = sha.new("".join(map(chr, key)) + h).digest()
# reassemble database
return db[:24] + dbid + db[32:50] + hash2 + db[70:88] + h + db[108:]
################################################################################
if __name__ == "__main__":
import sys
fwids = GetFWIDs()
print "detected FWIDs:", fwids
if fwids:
fwid = fwids[0]
else:
fwid = "000A27001B3EAD37"
print "no FWID detected, using default FWID for BIST"
try:
old = file(sys.argv[1], "rb").read()
except IndexError:
sys.exit(0)
new = UpdateHash(old, "000A27001B3EAD37")
print "old =>", " ".join(["%02X" % ord(c) for c in old[88:108]])
print "new =>", " ".join(["%02X" % ord(c) for c in new[88:108]])
if old == new:
print "MATCH!"
else:
print "no match :("
try:
file(sys.argv[2], "wb").write(new)
except IndexError:
pass