mirror of
https://github.com/noDRM/DeDRM_tools.git
synced 2024-11-16 19:06:09 +06:00
493 lines
16 KiB
Python
493 lines
16 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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from __future__ import print_function
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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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# 6.0 - Added Python 3 compatibility for calibre 5.0
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__version__ = '6.0'
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import sys
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import os, csv, getopt
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#@@CALIBRE_COMPAT_CODE@@
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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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from .utilities import SafeUnbuffered
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from .argv_utils import unicode_argv
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#global switch
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debug = 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 != "":
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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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if isinstance(record, str):
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record = record.encode('latin-1')
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fields = unpack('3sB8sB8s3s',record)
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if fields[0] != b'PID' or fields[5] != b'pid' :
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raise DrmException("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("Record didn't contain correct length fields")
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elif fields[2] != PID :
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raise DrmException("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 = 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 = 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("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 = open(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 != b'TPZ0':
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raise DrmException("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, end=' ')
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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("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("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[b'metadata'][0][0])
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tag = bookReadString(self.fo)
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if tag != b'metadata' :
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raise DrmException("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(b'keys',b'')
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keysRecordRecord = b''
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if keysRecord != b'':
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keylst = keysRecord.split(b',')
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for keyval in keylst:
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keysRecordRecord += self.bookMetadata.get(keyval,b'')
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return keysRecord, keysRecordRecord
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def getBookTitle(self):
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title = b''
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if b'Title' in self.bookMetadata:
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title = self.bookMetadata[b'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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if isinstance(record, str):
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record = bytes(record, 'latin-1')
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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(b'dkey', 0)
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except DrmException as e:
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print("no dkey record found, book may not be encrypted")
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print("attempting to extract files without a book key")
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self.createBookDirectory()
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self.extractFiles()
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print("Successfully Extracted Topaz contents")
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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("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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if isinstance(pid, str):
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pid = pid.encode('latin-1')
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print("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 as e:
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pass
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else:
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bookKey = bookKeys[0]
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print("Book Key Found! ({0})".format(bookKey.hex()))
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break
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if not bookKey:
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raise DrmException("No key found in {0:d} keys tried. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md".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("Successfully Extracted Topaz contents")
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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("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,"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,"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,"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,"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 != b'dkey':
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ext = ".dat"
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if name == b'img': ext = ".jpg"
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if name == b'color' : ext = ".jpg"
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print("Processing Section: {0}\n. . .".format(name.decode('utf-8')), end=' ')
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for index in range (0,len(self.bookHeaderRecords[name])) :
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fname = "{0}{1:04d}{2}".format(name.decode('utf-8'),index,ext)
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destdir = outdir
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if name == b'img':
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destdir = os.path.join(outdir,"img")
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if name == b'color':
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destdir = os.path.join(outdir,"color_img")
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if name == b'page':
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destdir = os.path.join(outdir,"page")
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if name == b'glyphs':
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destdir = os.path.join(outdir,"glyphs")
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outputFile = os.path.join(destdir,fname)
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print(".", end=' ')
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record = self.getBookPayloadRecord(name,index)
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if isinstance(record, str):
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record=bytes(record, 'latin-1')
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if record != b'':
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open(outputFile, 'wb').write(record)
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print(" ")
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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,"book.html"),"book.html")
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htmlzip.write(os.path.join(self.outdir,"book.opf"),"book.opf")
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if os.path.isfile(os.path.join(self.outdir,"cover.jpg")):
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htmlzip.write(os.path.join(self.outdir,"cover.jpg"),"cover.jpg")
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htmlzip.write(os.path.join(self.outdir,"style.css"),"style.css")
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zipUpDir(htmlzip, self.outdir, "img")
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htmlzip.close()
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def getBookType(self):
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return "Topaz"
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def getBookExtension(self):
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return ".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,"index_svg.xhtml"),"index_svg.xhtml")
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zipUpDir(svgzip, self.outdir, "svg")
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zipUpDir(svgzip, self.outdir, "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("Removes DRM protection from Topaz ebooks and extracts the contents")
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print("Usage:")
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print(" {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("topazextract.py")
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progname = os.path.basename(argv[0])
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print("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 as err:
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print("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("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("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("Processing Book: {0}".format(title))
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md1, md2 = tb.getPIDMetaInfo()
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pids.extend(kgenpids.getPidList(md1, md2, serials, kDatabaseFiles))
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try:
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print("Decrypting Book")
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tb.processBook(pids)
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print(" Creating HTML ZIP Archive")
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zipname = os.path.join(outdir, bookname + "_nodrm.htmlz")
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tb.getFile(zipname)
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print(" Creating SVG ZIP Archive")
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zipname = os.path.join(outdir, bookname + "_SVG.zip")
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tb.getSVGZip(zipname)
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# removing internal temporary directory of pieces
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tb.cleanup()
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except DrmException as e:
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print("Decryption failed\n{0}".format(traceback.format_exc()))
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try:
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tb.cleanup()
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except:
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pass
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return 1
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except Exception as e:
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print("Decryption failed\n{0}".format(traceback.format_exc()))
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try:
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tb.cleanup()
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except:
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pass
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return 1
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return 0
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if __name__ == '__main__':
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sys.stdout=SafeUnbuffered(sys.stdout)
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sys.stderr=SafeUnbuffered(sys.stderr)
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sys.exit(cli_main())
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