539 lines
18 KiB
Python
539 lines
18 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# topazextract.py
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# Mostly written by some_updates based on code from many others
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# Changelog
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# 4.9 - moved unicode_argv call inside main for Windows DeDRM compatibility
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# 5.0 - Fixed potential unicode problem with command line interface
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__version__ = '5.0'
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import sys
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import os, csv, getopt
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import zlib, zipfile, tempfile, shutil
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import traceback
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from struct import pack
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from struct import unpack
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from alfcrypto import Topaz_Cipher
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class SafeUnbuffered:
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def __init__(self, stream):
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self.stream = stream
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self.encoding = stream.encoding
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if self.encoding == None:
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self.encoding = "utf-8"
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def write(self, data):
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if isinstance(data,unicode):
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data = data.encode(self.encoding,"replace")
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self.stream.write(data)
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self.stream.flush()
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def __getattr__(self, attr):
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return getattr(self.stream, attr)
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iswindows = sys.platform.startswith('win')
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isosx = sys.platform.startswith('darwin')
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def unicode_argv():
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if iswindows:
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# Uses shell32.GetCommandLineArgvW to get sys.argv as a list of Unicode
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# strings.
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# Versions 2.x of Python don't support Unicode in sys.argv on
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# Windows, with the underlying Windows API instead replacing multi-byte
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# characters with '?'.
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from ctypes import POINTER, byref, cdll, c_int, windll
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from ctypes.wintypes import LPCWSTR, LPWSTR
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GetCommandLineW = cdll.kernel32.GetCommandLineW
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GetCommandLineW.argtypes = []
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GetCommandLineW.restype = LPCWSTR
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CommandLineToArgvW = windll.shell32.CommandLineToArgvW
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CommandLineToArgvW.argtypes = [LPCWSTR, POINTER(c_int)]
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CommandLineToArgvW.restype = POINTER(LPWSTR)
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cmd = GetCommandLineW()
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argc = c_int(0)
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argv = CommandLineToArgvW(cmd, byref(argc))
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if argc.value > 0:
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# Remove Python executable and commands if present
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start = argc.value - len(sys.argv)
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return [argv[i] for i in
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xrange(start, argc.value)]
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# if we don't have any arguments at all, just pass back script name
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# this should never happen
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return [u"mobidedrm.py"]
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else:
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argvencoding = sys.stdin.encoding
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if argvencoding == None:
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argvencoding = 'utf-8'
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return [arg if (type(arg) == unicode) else unicode(arg,argvencoding) for arg in sys.argv]
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#global switch
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debug = False
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if 'calibre' in sys.modules:
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inCalibre = True
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from calibre_plugins.dedrm import kgenpids
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else:
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inCalibre = False
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import kgenpids
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class DrmException(Exception):
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pass
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# recursive zip creation support routine
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def zipUpDir(myzip, tdir, localname):
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currentdir = tdir
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if localname != u"":
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currentdir = os.path.join(currentdir,localname)
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list = os.listdir(currentdir)
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for file in list:
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afilename = file
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localfilePath = os.path.join(localname, afilename)
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realfilePath = os.path.join(currentdir,file)
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if os.path.isfile(realfilePath):
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myzip.write(realfilePath, localfilePath)
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elif os.path.isdir(realfilePath):
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zipUpDir(myzip, tdir, localfilePath)
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#
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# Utility routines
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#
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# Get a 7 bit encoded number from file
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def bookReadEncodedNumber(fo):
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flag = False
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data = ord(fo.read(1))
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if data == 0xFF:
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flag = True
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data = ord(fo.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(fo.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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# Get a length prefixed string from file
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def bookReadString(fo):
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stringLength = bookReadEncodedNumber(fo)
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return unpack(str(stringLength)+'s',fo.read(stringLength))[0]
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#
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# crypto routines
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#
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# Context initialisation for the Topaz Crypto
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def topazCryptoInit(key):
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return Topaz_Cipher().ctx_init(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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# decrypt data with the context prepared by topazCryptoInit()
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def topazCryptoDecrypt(data, ctx):
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return Topaz_Cipher().decrypt(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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# Decrypt data with the PID
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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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# Try to decrypt a dkey record (contains the bookPID)
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def decryptDkeyRecord(data,PID):
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record = decryptRecord(data,PID)
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fields = unpack('3sB8sB8s3s',record)
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if fields[0] != 'PID' or fields[5] != 'pid' :
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raise DrmException(u"Didn't find PID magic numbers in record")
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elif fields[1] != 8 or fields[3] != 8 :
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raise DrmException(u"Record didn't contain correct length fields")
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elif fields[2] != PID :
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raise DrmException(u"Record didn't contain PID")
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return fields[4]
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# Decrypt all dkey records (contain the book PID)
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def decryptDkeyRecords(data,PID):
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nbKeyRecords = ord(data[0])
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records = []
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data = data[1:]
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for i in range (0,nbKeyRecords):
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length = ord(data[0])
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try:
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key = decryptDkeyRecord(data[1:length+1],PID)
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records.append(key)
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except DrmException:
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pass
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data = data[1+length:]
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if len(records) == 0:
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raise DrmException(u"BookKey Not Found")
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return records
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class TopazBook:
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def __init__(self, filename):
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self.fo = file(filename, 'rb')
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self.outdir = tempfile.mkdtemp()
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# self.outdir = 'rawdat'
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self.bookPayloadOffset = 0
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self.bookHeaderRecords = {}
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self.bookMetadata = {}
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self.bookKey = None
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magic = unpack('4s',self.fo.read(4))[0]
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if magic != 'TPZ0':
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raise DrmException(u"Parse Error : Invalid Header, not a Topaz file")
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self.parseTopazHeaders()
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self.parseMetadata()
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def parseTopazHeaders(self):
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def bookReadHeaderRecordData():
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# Read and return the data of one header record at the current book file position
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# [[offset,decompressedLength,compressedLength],...]
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nbValues = bookReadEncodedNumber(self.fo)
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if debug: print "%d records in header " % nbValues,
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values = []
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for i in range (0,nbValues):
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values.append([bookReadEncodedNumber(self.fo),bookReadEncodedNumber(self.fo),bookReadEncodedNumber(self.fo)])
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return values
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def parseTopazHeaderRecord():
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# Read and parse one header record at the current book file position and return the associated data
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# [[offset,decompressedLength,compressedLength],...]
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if ord(self.fo.read(1)) != 0x63:
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raise DrmException(u"Parse Error : Invalid Header")
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tag = bookReadString(self.fo)
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record = bookReadHeaderRecordData()
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return [tag,record]
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nbRecords = bookReadEncodedNumber(self.fo)
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if debug: print "Headers: %d" % nbRecords
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for i in range (0,nbRecords):
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result = parseTopazHeaderRecord()
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if debug: print result[0], ": ", result[1]
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self.bookHeaderRecords[result[0]] = result[1]
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if ord(self.fo.read(1)) != 0x64 :
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raise DrmException(u"Parse Error : Invalid Header")
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self.bookPayloadOffset = self.fo.tell()
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def parseMetadata(self):
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# Parse the metadata record from the book payload and return a list of [key,values]
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self.fo.seek(self.bookPayloadOffset + self.bookHeaderRecords['metadata'][0][0])
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tag = bookReadString(self.fo)
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if tag != 'metadata' :
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raise DrmException(u"Parse Error : Record Names Don't Match")
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flags = ord(self.fo.read(1))
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nbRecords = ord(self.fo.read(1))
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if debug: print "Metadata Records: %d" % nbRecords
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for i in range (0,nbRecords) :
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keyval = bookReadString(self.fo)
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content = bookReadString(self.fo)
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if debug: print keyval
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if debug: print content
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self.bookMetadata[keyval] = content
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return self.bookMetadata
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def getPIDMetaInfo(self):
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keysRecord = self.bookMetadata.get('keys','')
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keysRecordRecord = ''
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if keysRecord != '':
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keylst = keysRecord.split(',')
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for keyval in keylst:
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keysRecordRecord += self.bookMetadata.get(keyval,'')
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return keysRecord, keysRecordRecord
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def getBookTitle(self):
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title = ''
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if 'Title' in self.bookMetadata:
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title = self.bookMetadata['Title']
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return title.decode('utf-8')
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def setBookKey(self, key):
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self.bookKey = key
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def getBookPayloadRecord(self, name, index):
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# Get a record in the book payload, given its name and index.
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# decrypted and decompressed if necessary
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encrypted = False
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compressed = False
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try:
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recordOffset = self.bookHeaderRecords[name][index][0]
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except:
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raise DrmException("Parse Error : Invalid Record, record not found")
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self.fo.seek(self.bookPayloadOffset + recordOffset)
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tag = bookReadString(self.fo)
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if tag != name :
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raise DrmException("Parse Error : Invalid Record, record name doesn't match")
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recordIndex = bookReadEncodedNumber(self.fo)
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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 DrmException("Parse Error : Invalid Record, index doesn't match")
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if (self.bookHeaderRecords[name][index][2] > 0):
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compressed = True
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record = self.fo.read(self.bookHeaderRecords[name][index][2])
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else:
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record = self.fo.read(self.bookHeaderRecords[name][index][1])
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if encrypted:
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if self.bookKey:
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ctx = topazCryptoInit(self.bookKey)
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record = topazCryptoDecrypt(record,ctx)
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else :
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raise DrmException("Error: Attempt to decrypt without bookKey")
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if compressed:
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record = zlib.decompress(record)
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return record
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def processBook(self, pidlst):
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raw = 0
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fixedimage=True
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try:
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keydata = self.getBookPayloadRecord('dkey', 0)
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except DrmException, e:
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print u"no dkey record found, book may not be encrypted"
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print u"attempting to extrct files without a book key"
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self.createBookDirectory()
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self.extractFiles()
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print u"Successfully Extracted Topaz contents"
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if inCalibre:
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from calibre_plugins.dedrm import genbook
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else:
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import genbook
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rv = genbook.generateBook(self.outdir, raw, fixedimage)
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if rv == 0:
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print u"Book Successfully generated."
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return rv
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# try each pid to decode the file
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bookKey = None
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for pid in pidlst:
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# use 8 digit pids here
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pid = pid[0:8]
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print u"Trying: {0}".format(pid)
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bookKeys = []
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data = keydata
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try:
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bookKeys+=decryptDkeyRecords(data,pid)
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except DrmException, e:
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pass
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else:
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bookKey = bookKeys[0]
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print u"Book Key Found! ({0})".format(bookKey.encode('hex'))
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break
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if not bookKey:
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raise DrmException(u"No key found in {0:d} keys tried. Read the FAQs at Alf's blog: http://apprenticealf.wordpress.com/".format(len(pidlst)))
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self.setBookKey(bookKey)
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self.createBookDirectory()
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self.extractFiles()
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print u"Successfully Extracted Topaz contents"
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if inCalibre:
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from calibre_plugins.dedrm import genbook
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else:
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import genbook
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rv = genbook.generateBook(self.outdir, raw, fixedimage)
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if rv == 0:
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print u"Book Successfully generated"
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return rv
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def createBookDirectory(self):
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outdir = self.outdir
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# create output directory structure
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if not os.path.exists(outdir):
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os.makedirs(outdir)
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destdir = os.path.join(outdir,u"img")
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if not os.path.exists(destdir):
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os.makedirs(destdir)
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destdir = os.path.join(outdir,u"color_img")
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if not os.path.exists(destdir):
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os.makedirs(destdir)
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destdir = os.path.join(outdir,u"page")
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if not os.path.exists(destdir):
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os.makedirs(destdir)
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destdir = os.path.join(outdir,u"glyphs")
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if not os.path.exists(destdir):
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os.makedirs(destdir)
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def extractFiles(self):
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outdir = self.outdir
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for headerRecord in self.bookHeaderRecords:
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name = headerRecord
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if name != 'dkey':
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ext = u".dat"
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if name == 'img': ext = u".jpg"
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if name == 'color' : ext = u".jpg"
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print u"Processing Section: {0}\n. . .".format(name),
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for index in range (0,len(self.bookHeaderRecords[name])) :
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fname = u"{0}{1:04d}{2}".format(name,index,ext)
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destdir = outdir
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if name == 'img':
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destdir = os.path.join(outdir,u"img")
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if name == 'color':
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destdir = os.path.join(outdir,u"color_img")
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if name == 'page':
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destdir = os.path.join(outdir,u"page")
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if name == 'glyphs':
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destdir = os.path.join(outdir,u"glyphs")
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outputFile = os.path.join(destdir,fname)
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print u".",
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record = self.getBookPayloadRecord(name,index)
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if record != '':
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file(outputFile, 'wb').write(record)
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print u" "
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def getFile(self, zipname):
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htmlzip = zipfile.ZipFile(zipname,'w',zipfile.ZIP_DEFLATED, False)
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htmlzip.write(os.path.join(self.outdir,u"book.html"),u"book.html")
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htmlzip.write(os.path.join(self.outdir,u"book.opf"),u"book.opf")
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if os.path.isfile(os.path.join(self.outdir,u"cover.jpg")):
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htmlzip.write(os.path.join(self.outdir,u"cover.jpg"),u"cover.jpg")
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htmlzip.write(os.path.join(self.outdir,u"style.css"),u"style.css")
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zipUpDir(htmlzip, self.outdir, u"img")
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htmlzip.close()
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def getBookType(self):
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return u"Topaz"
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def getBookExtension(self):
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return u".htmlz"
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def getSVGZip(self, zipname):
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svgzip = zipfile.ZipFile(zipname,'w',zipfile.ZIP_DEFLATED, False)
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svgzip.write(os.path.join(self.outdir,u"index_svg.xhtml"),u"index_svg.xhtml")
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zipUpDir(svgzip, self.outdir, u"svg")
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zipUpDir(svgzip, self.outdir, u"img")
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svgzip.close()
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def cleanup(self):
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if os.path.isdir(self.outdir):
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shutil.rmtree(self.outdir, True)
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def usage(progname):
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print u"Removes DRM protection from Topaz ebooks and extracts the contents"
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print u"Usage:"
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print u" {0} [-k <kindle.k4i>] [-p <comma separated PIDs>] [-s <comma separated Kindle serial numbers>] <infile> <outdir>".format(progname)
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# Main
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def cli_main():
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argv=unicode_argv()
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progname = os.path.basename(argv[0])
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print u"TopazExtract v{0}.".format(__version__)
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try:
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opts, args = getopt.getopt(argv[1:], "k:p:s:x")
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except getopt.GetoptError, err:
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print u"Error in options or arguments: {0}".format(err.args[0])
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usage(progname)
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return 1
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if len(args)<2:
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usage(progname)
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return 1
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infile = args[0]
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outdir = args[1]
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if not os.path.isfile(infile):
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print u"Input File {0} Does Not Exist.".format(infile)
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return 1
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if not os.path.exists(outdir):
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print u"Output Directory {0} Does Not Exist.".format(outdir)
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return 1
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kDatabaseFiles = []
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serials = []
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pids = []
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for o, a in opts:
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if o == '-k':
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if a == None :
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raise DrmException("Invalid parameter for -k")
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kDatabaseFiles.append(a)
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if o == '-p':
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if a == None :
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raise DrmException("Invalid parameter for -p")
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pids = a.split(',')
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if o == '-s':
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if a == None :
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raise DrmException("Invalid parameter for -s")
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serials = [serial.replace(" ","") for serial in a.split(',')]
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bookname = os.path.splitext(os.path.basename(infile))[0]
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tb = TopazBook(infile)
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title = tb.getBookTitle()
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print u"Processing Book: {0}".format(title)
|
|
md1, md2 = tb.getPIDMetaInfo()
|
|
pids.extend(kgenpids.getPidList(md1, md2, serials, kDatabaseFiles))
|
|
|
|
try:
|
|
print u"Decrypting Book"
|
|
tb.processBook(pids)
|
|
|
|
print u" Creating HTML ZIP Archive"
|
|
zipname = os.path.join(outdir, bookname + u"_nodrm.htmlz")
|
|
tb.getFile(zipname)
|
|
|
|
print u" Creating SVG ZIP Archive"
|
|
zipname = os.path.join(outdir, bookname + u"_SVG.zip")
|
|
tb.getSVGZip(zipname)
|
|
|
|
# removing internal temporary directory of pieces
|
|
tb.cleanup()
|
|
|
|
except DrmException, e:
|
|
print u"Decryption failed\n{0}".format(traceback.format_exc())
|
|
|
|
try:
|
|
tb.cleanup()
|
|
except:
|
|
pass
|
|
return 1
|
|
|
|
except Exception, e:
|
|
print u"Decryption failed\m{0}".format(traceback.format_exc())
|
|
try:
|
|
tb.cleanup()
|
|
except:
|
|
pass
|
|
return 1
|
|
|
|
return 0
|
|
|
|
|
|
if __name__ == '__main__':
|
|
sys.stdout=SafeUnbuffered(sys.stdout)
|
|
sys.stderr=SafeUnbuffered(sys.stderr)
|
|
sys.exit(cli_main())
|