First Topaz decryption by CMBDTC at openrce.org
This commit is contained in:
CMBDTC
Apprentice Alf
parent
a23dd40ecf
commit
7027ac9b3e
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#! /usr/bin/python
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"""
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Comprehensive Mazama Book DRM with Topaz Cryptography V1.0
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-----BEGIN PUBLIC KEY-----
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MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDdBHJ4CNc6DNFCw4MRCw4SWAK6
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M8hYfnNEI0yQmn5Ti+W8biT7EatpauE/5jgQMPBmdNrDr1hbHyHBSP7xeC2qlRWC
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B62UCxeu/fpfnvNHDN/wPWWH4jynZ2M6cdcnE5LQ+FfeKqZn7gnG2No1U9h7oOHx
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y2/pHuYme7U1TsgSjwIDAQAB
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-----END PUBLIC KEY-----
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"""
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from __future__ import with_statement
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import csv
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import sys
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import os
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import getopt
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import zlib
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from struct import pack
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from struct import unpack
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from ctypes import windll, c_char_p, c_wchar_p, c_uint, POINTER, byref, \
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create_unicode_buffer, create_string_buffer, CFUNCTYPE, addressof, \
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string_at, Structure, c_void_p, cast
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import _winreg as winreg
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import Tkinter
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import Tkconstants
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import tkMessageBox
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import traceback
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import hashlib
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MAX_PATH = 255
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kernel32 = windll.kernel32
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advapi32 = windll.advapi32
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crypt32 = windll.crypt32
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global kindleDatabase
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global bookFile
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global bookPayloadOffset
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global bookHeaderRecords
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global bookMetadata
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global bookKey
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#
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# Various character maps used to decrypt books. Probably supposed to act as obfuscation
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#
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charMap1 = "n5Pr6St7Uv8Wx9YzAb0Cd1Ef2Gh3Jk4M"
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charMap2 = "AaZzB0bYyCc1XxDdW2wEeVv3FfUuG4g-TtHh5SsIiR6rJjQq7KkPpL8lOoMm9Nn_"
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charMap3 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
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charMap4 = "ABCDEFGHIJKLMNPQRSTUVWXYZ123456789"
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#
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# Exceptions for all the problems that might happen during the script
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#
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class CMBDTCError(Exception):
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pass
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class CMBDTCFatal(Exception):
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pass
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#
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# Stolen stuff
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#
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class DataBlob(Structure):
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_fields_ = [('cbData', c_uint),
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('pbData', c_void_p)]
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DataBlob_p = POINTER(DataBlob)
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def GetSystemDirectory():
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GetSystemDirectoryW = kernel32.GetSystemDirectoryW
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GetSystemDirectoryW.argtypes = [c_wchar_p, c_uint]
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GetSystemDirectoryW.restype = c_uint
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def GetSystemDirectory():
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buffer = create_unicode_buffer(MAX_PATH + 1)
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GetSystemDirectoryW(buffer, len(buffer))
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return buffer.value
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return GetSystemDirectory
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GetSystemDirectory = GetSystemDirectory()
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def GetVolumeSerialNumber():
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GetVolumeInformationW = kernel32.GetVolumeInformationW
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GetVolumeInformationW.argtypes = [c_wchar_p, c_wchar_p, c_uint,
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POINTER(c_uint), POINTER(c_uint),
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POINTER(c_uint), c_wchar_p, c_uint]
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GetVolumeInformationW.restype = c_uint
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def GetVolumeSerialNumber(path):
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vsn = c_uint(0)
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GetVolumeInformationW(path, None, 0, byref(vsn), None, None, None, 0)
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return vsn.value
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return GetVolumeSerialNumber
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GetVolumeSerialNumber = GetVolumeSerialNumber()
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def GetUserName():
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GetUserNameW = advapi32.GetUserNameW
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GetUserNameW.argtypes = [c_wchar_p, POINTER(c_uint)]
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GetUserNameW.restype = c_uint
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def GetUserName():
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buffer = create_unicode_buffer(32)
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size = c_uint(len(buffer))
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while not GetUserNameW(buffer, byref(size)):
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buffer = create_unicode_buffer(len(buffer) * 2)
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size.value = len(buffer)
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return buffer.value.encode('utf-16-le')[::2]
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return GetUserName
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GetUserName = GetUserName()
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def CryptUnprotectData():
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_CryptUnprotectData = crypt32.CryptUnprotectData
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_CryptUnprotectData.argtypes = [DataBlob_p, c_wchar_p, DataBlob_p,
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c_void_p, c_void_p, c_uint, DataBlob_p]
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_CryptUnprotectData.restype = c_uint
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def CryptUnprotectData(indata, entropy):
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indatab = create_string_buffer(indata)
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indata = DataBlob(len(indata), cast(indatab, c_void_p))
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entropyb = create_string_buffer(entropy)
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entropy = DataBlob(len(entropy), cast(entropyb, c_void_p))
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outdata = DataBlob()
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if not _CryptUnprotectData(byref(indata), None, byref(entropy),
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None, None, 0, byref(outdata)):
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raise CMBDTCFatal("Failed to Unprotect Data")
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return string_at(outdata.pbData, outdata.cbData)
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return CryptUnprotectData
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CryptUnprotectData = CryptUnprotectData()
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#
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# Returns the MD5 digest of "message"
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#
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def MD5(message):
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ctx = hashlib.md5()
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ctx.update(message)
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return ctx.digest()
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#
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# Returns the SHA1 digest of "message"
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#
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def SHA1(message):
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ctx = hashlib.sha1()
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ctx.update(message)
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return ctx.digest()
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#
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# Open the book file at path
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#
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def openBook(path):
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try:
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return open(path,'rb')
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except:
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raise CMBDTCFatal("Could not open book file: " + path)
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#
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# Encode the bytes in data with the characters in map
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#
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def encode(data, map):
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result = ""
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for char in data:
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value = ord(char)
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Q = (value ^ 0x80) // len(map)
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R = value % len(map)
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result += map[Q]
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result += map[R]
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return result
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#
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# Hash the bytes in data and then encode the digest with the characters in map
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#
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def encodeHash(data,map):
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return encode(MD5(data),map)
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#
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# Decode the string in data with the characters in map. Returns the decoded bytes
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#
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def decode(data,map):
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result = ""
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for i in range (0,len(data),2):
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high = map.find(data[i])
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low = map.find(data[i+1])
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value = (((high * 0x40) ^ 0x80) & 0xFF) + low
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result += pack("B",value)
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return result
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#
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# Locate and open the Kindle.info file (Hopefully in the way it is done in the Kindle application)
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#
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def openKindleInfo():
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regkey = winreg.OpenKey(winreg.HKEY_CURRENT_USER, "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders\\")
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path = winreg.QueryValueEx(regkey, 'Local AppData')[0]
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return open(path+'\\Amazon\\Kindle For PC\\{AMAwzsaPaaZAzmZzZQzgZCAkZ3AjA_AY}\\kindle.info','r')
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#
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# Parse the Kindle.info file and return the records as a list of key-values
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#
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def parseKindleInfo():
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DB = {}
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infoReader = openKindleInfo()
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infoReader.read(1)
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data = infoReader.read()
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items = data.split('{')
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for item in items:
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splito = item.split(':')
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DB[splito[0]] =splito[1]
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return DB
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#
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# Find if the original string for a hashed/encoded string is known. If so return the original string othwise return an empty string. (Totally not optimal)
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#
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def findNameForHash(hash):
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names = ["kindle.account.tokens","kindle.cookie.item","eulaVersionAccepted","login_date","kindle.token.item","login","kindle.key.item","kindle.name.info","kindle.device.info", "MazamaRandomNumber"]
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result = ""
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for name in names:
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if hash == encodeHash(name, charMap2):
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result = name
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break
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return result
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#
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# Print all the records from the kindle.info file (option -i)
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#
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def printKindleInfo():
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for record in kindleDatabase:
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name = findNameForHash(record)
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if name != "" :
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print (name)
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print ("--------------------------\n")
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else :
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print ("Unknown Record")
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print getKindleInfoValueForHash(record)
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print "\n"
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#
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# Get a record from the Kindle.info file for the key "hashedKey" (already hashed and encoded). Return the decoded and decrypted record
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#
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def getKindleInfoValueForHash(hashedKey):
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global kindleDatabase
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encryptedValue = decode(kindleDatabase[hashedKey],charMap2)
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return CryptUnprotectData(encryptedValue,"")
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#
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# Get a record from the Kindle.info file for the string in "key" (plaintext). Return the decoded and decrypted record
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#
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def getKindleInfoValueForKey(key):
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return getKindleInfoValueForHash(encodeHash(key,charMap2))
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#
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# Get a 7 bit encoded number form the book file
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#
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def bookReadEncodedNumber():
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flag = False
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data = ord(bookFile.read(1))
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if data == 0xFF:
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flag = True
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data = ord(bookFile.read(1))
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if data >= 0x80:
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datax = (data & 0x7F)
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while data >= 0x80 :
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data = ord(bookFile.read(1))
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datax = (datax <<7) + (data & 0x7F)
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data = datax
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if flag:
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data = -data
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return data
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#
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# Get a length prefixed string from the file
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#
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def bookReadString():
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stringLength = bookReadEncodedNumber()
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return unpack(str(stringLength)+"s",bookFile.read(stringLength))[0]
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#
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# Read and return the data of one header record at the current book file position [[offset,compressedLength,decompressedLength],...]
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#
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def bookReadHeaderRecordData():
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nbValues = ord(bookFile.read(1))
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values = []
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for i in range (0,nbValues):
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values.append([bookReadEncodedNumber(),bookReadEncodedNumber(),bookReadEncodedNumber()])
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return values
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#
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# Read and parse one header record at the current book file position and return the associated data [[offset,compressedLength,decompressedLength],...]
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#
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def parseTopazHeaderRecord():
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if ord(bookFile.read(1)) != 0x63:
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raise CMBDTCFatal("Parse Error : Invalid Header")
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tag = bookReadString()
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record = bookReadHeaderRecordData()
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return [tag,record]
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#
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# Parse the header of a Topaz file, get all the header records and the offset for the payload
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#
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def parseTopazHeader():
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global bookHeaderRecords
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global bookPayloadOffset
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magic = unpack("4s",bookFile.read(4))[0]
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if magic != 'TPZ0':
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raise CMBDTCFatal("Parse Error : Invalid Header, not a Topaz file")
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nbRecords = ord(bookFile.read(1))
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bookHeaderRecords = {}
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for i in range (0,nbRecords):
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result = parseTopazHeaderRecord()
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bookHeaderRecords[result[0]] = result[1]
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if ord(bookFile.read(1)) != 0x64 :
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raise CMBDTCFatal("Parse Error : Invalid Header")
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bookPayloadOffset = bookFile.tell()
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#
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# Get a record in the book payload, given its name and index. If necessary the record is decrypted. The record is not decompressed
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#
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def getBookPayloadRecord(name, index):
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encrypted = False
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try:
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recordOffset = bookHeaderRecords[name][index][0]
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except:
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raise CMBDTCFatal("Parse Error : Invalid Record, record not found")
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bookFile.seek(bookPayloadOffset + recordOffset)
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tag = bookReadString()
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if tag != name :
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raise CMBDTCFatal("Parse Error : Invalid Record, record name doesn't match")
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recordIndex = bookReadEncodedNumber()
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if recordIndex < 0 :
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encrypted = True
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recordIndex = -recordIndex -1
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if recordIndex != index :
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raise CMBDTCFatal("Parse Error : Invalid Record, index doesn't match")
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record = bookFile.read(bookHeaderRecords[name][index][1])
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if encrypted:
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ctx = topazCryptoInit(bookKey)
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record = topazCryptoDecrypt(record,ctx)
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return record
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#
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# Extract, decrypt and decompress a book record indicated by name and index and print it or save it in "filename"
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#
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def extractBookPayloadRecord(name, index, filename):
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compressed = False
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try:
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compressed = bookHeaderRecords[name][index][2] != 0
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record = getBookPayloadRecord(name,index)
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except:
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print("Could not find record")
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if compressed:
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try:
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record = zlib.decompress(record)
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except:
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raise CMBDTCFatal("Could not decompress record")
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if filename != "":
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try:
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file = open(filename,"wb")
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file.write(record)
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file.close()
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except:
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raise CMBDTCFatal("Could not write to destination file")
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else:
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print(record)
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#
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# return next record [key,value] from the book metadata from the current book position
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#
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def readMetadataRecord():
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return [bookReadString(),bookReadString()]
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#
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# Parse the metadata record from the book payload and return a list of [key,values]
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#
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def parseMetadata():
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global bookHeaderRecords
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global bookPayloadAddress
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global bookMetadata
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bookMetadata = {}
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bookFile.seek(bookPayloadOffset + bookHeaderRecords["metadata"][0][0])
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tag = bookReadString()
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if tag != "metadata" :
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raise CMBDTCFatal("Parse Error : Record Names Don't Match")
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flags = ord(bookFile.read(1))
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nbRecords = ord(bookFile.read(1))
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for i in range (0,nbRecords) :
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record =readMetadataRecord()
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bookMetadata[record[0]] = record[1]
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#
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# Returns two bit at offset from a bit field
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#
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def getTwoBitsFromBitField(bitField,offset):
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byteNumber = offset // 4
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bitPosition = 6 - 2*(offset % 4)
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return ord(bitField[byteNumber]) >> bitPosition & 3
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#
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# Returns the six bits at offset from a bit field
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#
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def getSixBitsFromBitField(bitField,offset):
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offset *= 3
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value = (getTwoBitsFromBitField(bitField,offset) <<4) + (getTwoBitsFromBitField(bitField,offset+1) << 2) +getTwoBitsFromBitField(bitField,offset+2)
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return value
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#
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# 8 bits to six bits encoding from hash to generate PID string
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#
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def encodePID(hash):
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global charMap3
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PID = ""
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for position in range (0,8):
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PID += charMap3[getSixBitsFromBitField(hash,position)]
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return PID
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#
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# Context initialisation for the Topaz Crypto
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#
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def topazCryptoInit(key):
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ctx1 = 0x0CAFFE19E
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for keyChar in key:
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keyByte = ord(keyChar)
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ctx2 = ctx1
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ctx1 = ((((ctx1 >>2) * (ctx1 >>7))&0xFFFFFFFF) ^ (keyByte * keyByte * 0x0F902007)& 0xFFFFFFFF )
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return [ctx1,ctx2]
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#
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# decrypt data with the context prepared by topazCryptoInit()
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#
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def topazCryptoDecrypt(data, ctx):
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ctx1 = ctx[0]
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ctx2 = ctx[1]
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plainText = ""
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for dataChar in data:
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dataByte = ord(dataChar)
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m = (dataByte ^ ((ctx1 >> 3) &0xFF) ^ ((ctx2<<3) & 0xFF)) &0xFF
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ctx2 = ctx1
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ctx1 = (((ctx1 >> 2) * (ctx1 >> 7)) &0xFFFFFFFF) ^((m * m * 0x0F902007) &0xFFFFFFFF)
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plainText += chr(m)
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return plainText
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#
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# Decrypt a payload record with the PID
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#
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def decryptRecord(data,PID):
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ctx = topazCryptoInit(PID)
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return topazCryptoDecrypt(data, ctx)
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#
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# Try to decrypt a dkey record (contains the book PID)
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#
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def decryptDkeyRecord(data,PID):
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record = decryptRecord(data,PID)
|
||||
fields = unpack("3sB8sB8s3s",record)
|
||||
|
||||
if fields[0] != "PID" or fields[5] != "pid" :
|
||||
raise CMBDTCError("Didn't find PID magic numbers in record")
|
||||
elif fields[1] != 8 or fields[3] != 8 :
|
||||
raise CMBDTCError("Record didn't contain correct length fields")
|
||||
elif fields[2] != PID :
|
||||
raise CMBDTCError("Record didn't contain PID")
|
||||
|
||||
return fields[4]
|
||||
|
||||
#
|
||||
# Decrypt all the book's dkey records (contain the book PID)
|
||||
#
|
||||
|
||||
def decryptDkeyRecords(data,PID):
|
||||
nbKeyRecords = ord(data[0])
|
||||
records = []
|
||||
data = data[1:]
|
||||
for i in range (0,nbKeyRecords):
|
||||
length = ord(data[0])
|
||||
try:
|
||||
key = decryptDkeyRecord(data[1:length+1],PID)
|
||||
records.append(key)
|
||||
except CMBDTCError:
|
||||
pass
|
||||
data = data[1+length:]
|
||||
|
||||
return records
|
||||
|
||||
#
|
||||
# Encryption table used to generate the device PID
|
||||
#
|
||||
|
||||
def generatePidEncryptionTable() :
|
||||
table = []
|
||||
for counter1 in range (0,0x100):
|
||||
value = counter1
|
||||
for counter2 in range (0,8):
|
||||
if (value & 1 == 0) :
|
||||
value = value >> 1
|
||||
else :
|
||||
value = value >> 1
|
||||
value = value ^ 0xEDB88320
|
||||
table.append(value)
|
||||
return table
|
||||
|
||||
#
|
||||
# Seed value used to generate the device PID
|
||||
#
|
||||
|
||||
def generatePidSeed(table,dsn) :
|
||||
value = 0
|
||||
for counter in range (0,4) :
|
||||
index = (ord(dsn[counter]) ^ value) &0xFF
|
||||
value = (value >> 8) ^ table[index]
|
||||
return value
|
||||
|
||||
#
|
||||
# Generate the device PID
|
||||
#
|
||||
|
||||
def generateDevicePID(table,dsn,nbRoll):
|
||||
seed = generatePidSeed(table,dsn)
|
||||
pidAscii = ""
|
||||
pid = [(seed >>24) &0xFF,(seed >> 16) &0xff,(seed >> 8) &0xFF,(seed) & 0xFF,(seed>>24) & 0xFF,(seed >> 16) &0xff,(seed >> 8) &0xFF,(seed) & 0xFF]
|
||||
index = 0
|
||||
|
||||
for counter in range (0,nbRoll):
|
||||
pid[index] = pid[index] ^ ord(dsn[counter])
|
||||
index = (index+1) %8
|
||||
|
||||
for counter in range (0,8):
|
||||
index = ((((pid[counter] >>5) & 3) ^ pid[counter]) & 0x1f) + (pid[counter] >> 7)
|
||||
pidAscii += charMap4[index]
|
||||
return pidAscii
|
||||
|
||||
#
|
||||
# Program usage
|
||||
#
|
||||
|
||||
def usage():
|
||||
print("\nUsage:")
|
||||
print("\nCMBDTC.py [options] bookFileName\n")
|
||||
print("-r prints a record indicated in the form name:index (e.g \"img:0\")")
|
||||
print("-o Output file name to write records")
|
||||
print("-v verbose (can be used several times)")
|
||||
print("-i print kindle.info database")
|
||||
|
||||
#
|
||||
# Main
|
||||
#
|
||||
|
||||
def main(argv=sys.argv):
|
||||
global kindleDatabase
|
||||
global bookMetadata
|
||||
global bookKey
|
||||
global bookFile
|
||||
progname = os.path.basename(argv[0])
|
||||
|
||||
verbose = 0
|
||||
printInfo = False
|
||||
recordName = ""
|
||||
recordIndex = 0
|
||||
outputFile = ""
|
||||
|
||||
try:
|
||||
opts, args = getopt.getopt(sys.argv[1:], "vir:o:")
|
||||
except getopt.GetoptError, err:
|
||||
# print help information and exit:
|
||||
print str(err) # will print something like "option -a not recognized"
|
||||
usage()
|
||||
sys.exit(2)
|
||||
|
||||
if len(opts) == 0 and len(args) == 0 :
|
||||
usage()
|
||||
sys.exit(2)
|
||||
|
||||
for o, a in opts:
|
||||
if o == "-v":
|
||||
verbose+=1
|
||||
if o == "-i":
|
||||
printInfo = True
|
||||
if o =="-o":
|
||||
outputFile = a
|
||||
if o =="-r":
|
||||
recordName,recordIndex = a.split(':')
|
||||
|
||||
#
|
||||
# Read the encrypted database
|
||||
#
|
||||
|
||||
kindleDatabase = parseKindleInfo()
|
||||
|
||||
if printInfo:
|
||||
printKindleInfo()
|
||||
|
||||
#
|
||||
# Compute the DSN
|
||||
#
|
||||
|
||||
# Get the Mazama Random number
|
||||
MazamaRandomNumber = getKindleInfoValueForKey("MazamaRandomNumber")
|
||||
|
||||
# Get the HDD serial
|
||||
encodedSystemVolumeSerialNumber = encodeHash(str(GetVolumeSerialNumber(GetSystemDirectory().split('\\')[0] + '\\')),charMap1)
|
||||
|
||||
# Get the current user name
|
||||
encodedUsername = encodeHash(GetUserName(),charMap1)
|
||||
|
||||
# concat, hash and encode
|
||||
DSN = encode(SHA1(MazamaRandomNumber+encodedSystemVolumeSerialNumber+encodedUsername),charMap1)
|
||||
if verbose >1:
|
||||
print("DSN: " + DSN)
|
||||
|
||||
#
|
||||
# Compute the device PID
|
||||
#
|
||||
|
||||
table = generatePidEncryptionTable()
|
||||
devicePID = generateDevicePID(table,DSN,4)
|
||||
|
||||
if verbose > 0:
|
||||
print("Device PID: " + devicePID)
|
||||
|
||||
#
|
||||
# Open book and parse metadata
|
||||
#
|
||||
|
||||
if len(args) == 1:
|
||||
|
||||
bookFile = openBook(args[0])
|
||||
parseTopazHeader()
|
||||
parseMetadata()
|
||||
|
||||
#
|
||||
# Compute book PID
|
||||
#
|
||||
|
||||
# Get the account token
|
||||
kindleAccountToken = getKindleInfoValueForKey("kindle.account.tokens")
|
||||
|
||||
if verbose >1:
|
||||
print("Account Token: " + kindleAccountToken)
|
||||
|
||||
keysRecord = bookMetadata["keys"]
|
||||
keysRecordRecord = bookMetadata[keysRecord]
|
||||
|
||||
pidHash = SHA1(DSN+kindleAccountToken+keysRecord+keysRecordRecord)
|
||||
|
||||
PID = encodePID(pidHash)
|
||||
|
||||
if verbose > 0:
|
||||
print ("Book PID: " + PID )
|
||||
|
||||
#
|
||||
# Decrypt book key
|
||||
#
|
||||
|
||||
dkey = getBookPayloadRecord('dkey', 0)
|
||||
|
||||
bookKey = decryptDkeyRecords(dkey,PID)[0]
|
||||
|
||||
if verbose > 0:
|
||||
print("Book key: " + bookKey.encode('hex'))
|
||||
|
||||
if recordName != "" :
|
||||
extractBookPayloadRecord(recordName,int(recordIndex),outputFile)
|
||||
if outputFile != "" and verbose>0 :
|
||||
print("Wrote record to file: "+outputFile)
|
||||
|
||||
return 0
|
||||
|
||||
if __name__ == '__main__':
|
||||
sys.exit(main())
|
||||
Loading…
Reference in New Issue