#!/usr/bin/env python # # hash generation library for rePear, the iPod database management tool # Copyright (C) 2008 Martin J. Fiedler # 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, re, hashlib 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] 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 and (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(b"\0", 1)[0].strip().upper() except IOError: return "" fwids = [] re_devdir = re.compile(r'^\d+-\d+$') for dev in devs: if not re_devdir.match(dev): continue devdir = os.path.join(LINUX_DEVDIR_BASE, dev) if not os.path.isdir(devdir): continue if not((sysfile("idVendor") == "05AC") \ or (sysfile("manufacturer") == "APPLE")): continue if not((sysfile("idProduct")[:2] in ("12", "13")) \ or (sysfile("product") == "IPOD")): continue fwid = sysfile("serial") if fwid and fwid.startswith(b"000A27"): fwids.append(fwid) return fwids re_ioreg = re.compile(r'"(.*?)"\s+=\s+"?(.*?)"?$') 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 * b"\0" db = db[:24] + (8 * b"\0") + db[32:48] + b"\x01\x00" + z + db[70:88] + z + db[108:] # convert fwid to byte array fwid = [int(fwid[i:i+2], 16) for i in range(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 = int(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 = list(hashlib.sha1(bytes(key)).digest()) # first XOR key = [(x ^ 0x36) for x in key] + 44 * [0x36] # first SHA h = hashlib.sha1(bytes(key) + db).digest() # second XOR key = [(x ^ (0x36 ^ 0x5C)) for x in key] # second SHA h = hashlib.sha1(bytes(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 = open(sys.argv[1], "rb").read() except IndexError: sys.exit(0) new = UpdateHash(old, "000A27001B3EAD37") print("old =>", " ".join(["%02X" % c for c in old[88:108]])) print("new =>", " ".join(["%02X" % c for c in new[88:108]])) if old == new: print("MATCH!") else: print("no match :(") try: open(sys.argv[2], "wb").write(new) except IndexError: pass