761 lines
29 KiB
Python
761 lines
29 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Version 3.2.5 December 2016
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# Improve detection of good text decryption.
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#
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# Version 3.2.4 December 2016
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# Remove incorrect support for Kobo Desktop under Wine
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#
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# Version 3.2.3 October 2016
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# Fix for windows network user and more xml fixes
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#
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# Version 3.2.2 October 2016
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# Change to the way the new database version is handled.
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#
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# Version 3.2.1 September 2016
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# Update for v4.0 of Windows Desktop app.
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#
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# Version 3.2.0 January 2016
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# Update for latest version of Windows Desktop app.
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# Support Kobo devices in the command line version.
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#
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# Version 3.1.9 November 2015
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# Handle Kobo Desktop under wine on Linux
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#
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# Version 3.1.8 November 2015
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# Handle the case of Kobo Arc or Vox device (i.e. don't crash).
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#
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# Version 3.1.7 October 2015
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# Handle the case of no device or database more gracefully.
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#
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# Version 3.1.6 September 2015
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# Enable support for Kobo devices
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# More character encoding fixes (unicode strings)
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#
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# Version 3.1.5 September 2015
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# Removed requirement that a purchase has been made.
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# Also add in character encoding fixes
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#
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# Version 3.1.4 September 2015
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# Updated for version 3.17 of the Windows Desktop app.
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#
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# Version 3.1.3 August 2015
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# Add translations for Portuguese and Arabic
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#
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# Version 3.1.2 January 2015
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# Add coding, version number and version announcement
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#
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# Version 3.05 October 2014
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# Identifies DRM-free books in the dialog
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#
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# Version 3.04 September 2014
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# Handles DRM-free books as well (sometimes Kobo Library doesn't
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# show download link for DRM-free books)
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#
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# Version 3.03 August 2014
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# If PyCrypto is unavailable try to use libcrypto for AES_ECB.
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#
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# Version 3.02 August 2014
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# Relax checking of application/xhtml+xml and image/jpeg content.
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#
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# Version 3.01 June 2014
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# Check image/jpeg as well as application/xhtml+xml content. Fix typo
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# in Windows ipconfig parsing.
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#
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# Version 3.0 June 2014
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# Made portable for Mac and Windows, and the only module dependency
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# not part of python core is PyCrypto. Major code cleanup/rewrite.
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# No longer tries the first MAC address; tries them all if it detects
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# the decryption failed.
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#
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# Updated September 2013 by Anon
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# Version 2.02
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# Incorporated minor fixes posted at Apprentice Alf's.
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#
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# Updates July 2012 by Michael Newton
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# PWSD ID is no longer a MAC address, but should always
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# be stored in the registry. Script now works with OS X
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# and checks plist for values instead of registry. Must
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# have biplist installed for OS X support.
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#
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# Original comments left below; note the "AUTOPSY" is inaccurate. See
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# KoboLibrary.userkeys and KoboFile.decrypt()
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#
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##########################################################
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# KOBO DRM CRACK BY #
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# PHYSISTICATED #
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##########################################################
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# This app was made for Python 2.7 on Windows 32-bit
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#
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# This app needs pycrypto - get from here:
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# http://www.voidspace.org.uk/python/modules.shtml
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#
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# Usage: obok.py
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# Choose the book you want to decrypt
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#
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# Shouts to my krew - you know who you are - and one in
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# particular who gave me a lot of help with this - thank
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# you so much!
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#
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# Kopimi /K\
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# Keep sharing, keep copying, but remember that nothing is
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# for free - make sure you compensate your favorite
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# authors - and cut out the middle man whenever possible
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# ;) ;) ;)
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#
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# DRM AUTOPSY
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# The Kobo DRM was incredibly easy to crack, but it took
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# me months to get around to making this. Here's the
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# basics of how it works:
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# 1: Get MAC address of first NIC in ipconfig (sometimes
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# stored in registry as pwsdid)
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# 2: Get user ID (stored in tons of places, this gets it
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# from HKEY_CURRENT_USER\Software\Kobo\Kobo Desktop
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# Edition\Browser\cookies)
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# 3: Concatenate and SHA256, take the second half - this
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# is your master key
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# 4: Open %LOCALAPPDATA%\Kobo Desktop Editions\Kobo.sqlite
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# and dump content_keys
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# 5: Unbase64 the keys, then decode these with the master
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# key - these are your page keys
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# 6: Unzip EPUB of your choice, decrypt each page with its
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# page key, then zip back up again
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#
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# WHY USE THIS WHEN INEPT WORKS FINE? (adobe DRM stripper)
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# Inept works very well, but authors on Kobo can choose
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# what DRM they want to use - and some have chosen not to
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# let people download them with Adobe Digital Editions -
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# they would rather lock you into a single platform.
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#
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# With Obok, you can sync Kobo Desktop, decrypt all your
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# ebooks, and then use them on whatever device you want
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# - you bought them, you own them, you can do what you
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# like with them.
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#
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# Obok is Kobo backwards, but it is also means "next to"
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# in Polish.
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# When you buy a real book, it is right next to you. You
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# can read it at home, at work, on a train, you can lend
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# it to a friend, you can scribble on it, and add your own
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# explanations/translations.
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#
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# Obok gives you this power over your ebooks - no longer
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# are you restricted to one device. This allows you to
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# embed foreign fonts into your books, as older Kobo's
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# can't display them properly. You can read your books
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# on your phones, in different PC readers, and different
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# ereader devices. You can share them with your friends
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# too, if you like - you can do that with a real book
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# after all.
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#
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"""Manage all Kobo books, either encrypted or DRM-free."""
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from __future__ import print_function
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__version__ = '3.2.4'
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__about__ = u"Obok v{0}\nCopyright © 2012-2016 Physisticated et al.".format(__version__)
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import sys
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import os
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import subprocess
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import sqlite3
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import base64
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import binascii
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import re
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import zipfile
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import hashlib
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import xml.etree.ElementTree as ET
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import string
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import shutil
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import argparse
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import tempfile
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can_parse_xml = True
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try:
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from xml.etree import ElementTree as ET
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# print u"using xml.etree for xml parsing"
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except ImportError:
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can_parse_xml = False
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# print u"Cannot find xml.etree, disabling extraction of serial numbers"
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# List of all known hash keys
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KOBO_HASH_KEYS = ['88b3a2e13', 'XzUhGYdFp', 'NoCanLook','QJhwzAtXL']
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class ENCRYPTIONError(Exception):
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pass
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def _load_crypto_libcrypto():
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from ctypes import CDLL, POINTER, c_void_p, c_char_p, c_int, c_long, \
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Structure, c_ulong, create_string_buffer, cast
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from ctypes.util import find_library
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if sys.platform.startswith('win'):
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libcrypto = find_library('libeay32')
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else:
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libcrypto = find_library('crypto')
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if libcrypto is None:
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raise ENCRYPTIONError('libcrypto not found')
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libcrypto = CDLL(libcrypto)
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AES_MAXNR = 14
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c_char_pp = POINTER(c_char_p)
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c_int_p = POINTER(c_int)
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class AES_KEY(Structure):
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_fields_ = [('rd_key', c_long * (4 * (AES_MAXNR + 1))),
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('rounds', c_int)]
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AES_KEY_p = POINTER(AES_KEY)
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def F(restype, name, argtypes):
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func = getattr(libcrypto, name)
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func.restype = restype
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func.argtypes = argtypes
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return func
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AES_set_decrypt_key = F(c_int, 'AES_set_decrypt_key',
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[c_char_p, c_int, AES_KEY_p])
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AES_ecb_encrypt = F(None, 'AES_ecb_encrypt',
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[c_char_p, c_char_p, AES_KEY_p, c_int])
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class AES(object):
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def __init__(self, userkey):
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self._blocksize = len(userkey)
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if (self._blocksize != 16) and (self._blocksize != 24) and (self._blocksize != 32) :
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raise ENCRYPTIONError(_('AES improper key used'))
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return
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key = self._key = AES_KEY()
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rv = AES_set_decrypt_key(userkey, len(userkey) * 8, key)
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if rv < 0:
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raise ENCRYPTIONError(_('Failed to initialize AES key'))
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def decrypt(self, data):
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clear = ''
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for i in range(0, len(data), 16):
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out = create_string_buffer(16)
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rv = AES_ecb_encrypt(data[i:i+16], out, self._key, 0)
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if rv == 0:
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raise ENCRYPTIONError(_('AES decryption failed'))
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clear += out.raw
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return clear
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return AES
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def _load_crypto_pycrypto():
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from Crypto.Cipher import AES as _AES
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class AES(object):
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def __init__(self, key):
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self._aes = _AES.new(key, _AES.MODE_ECB)
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def decrypt(self, data):
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return self._aes.decrypt(data)
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return AES
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def _load_crypto():
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AES = None
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cryptolist = (_load_crypto_pycrypto, _load_crypto_libcrypto)
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for loader in cryptolist:
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try:
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AES = loader()
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break
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except (ImportError, ENCRYPTIONError):
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pass
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return AES
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AES = _load_crypto()
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# Wrap a stream so that output gets flushed immediately
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# and also make sure that any unicode strings get
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# encoded using "replace" before writing them.
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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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class KoboLibrary(object):
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"""The Kobo library.
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This class represents all the information available from the data
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written by the Kobo Desktop Edition application, including the list
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of books, their titles, and the user's encryption key(s)."""
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def __init__ (self, serials = [], device_path = None, desktopkobodir = u""):
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print(__about__)
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self.kobodir = u""
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kobodb = u""
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# Order of checks
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# 1. first check if a device_path has been passed in, and whether
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# we can find the sqlite db in the respective place
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# 2. if 1., and we got some serials passed in (from saved
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# settings in calibre), just use it
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# 3. if 1. worked, but we didn't get serials, try to parse them
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# from the device, if this didn't work, unset everything
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# 4. if by now we don't have kobodir set, give up on device and
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# try to use the Desktop app.
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# step 1. check whether this looks like a real device
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if (device_path):
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# we got a device path
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self.kobodir = os.path.join(device_path, u".kobo")
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# devices use KoboReader.sqlite
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kobodb = os.path.join(self.kobodir, u"KoboReader.sqlite")
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if (not(os.path.isfile(kobodb))):
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# device path seems to be wrong, unset it
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device_path = u""
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self.kobodir = u""
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kobodb = u""
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if (self.kobodir):
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# step 3. we found a device but didn't get serials, try to get them
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if (len(serials) == 0):
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# we got a device path but no saved serial
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# try to get the serial from the device
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# print u"get_device_settings - device_path = {0}".format(device_path)
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# get serial from device_path/.adobe-digital-editions/device.xml
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if can_parse_xml:
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devicexml = os.path.join(device_path, '.adobe-digital-editions', 'device.xml')
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# print u"trying to load {0}".format(devicexml)
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if (os.path.exists(devicexml)):
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# print u"trying to parse {0}".format(devicexml)
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xmltree = ET.parse(devicexml)
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for node in xmltree.iter():
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if "deviceSerial" in node.tag:
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serial = node.text
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# print u"found serial {0}".format(serial)
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serials.append(serial)
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break
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else:
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# print u"cannot get serials from device."
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device_path = u""
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self.kobodir = u""
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kobodb = u""
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if (self.kobodir == u""):
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# step 4. we haven't found a device with serials, so try desktop apps
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if desktopkobodir != u'':
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self.kobodir = desktopkobodir
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if (self.kobodir == u""):
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if sys.platform.startswith('win'):
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import _winreg as winreg
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if sys.getwindowsversion().major > 5:
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if 'LOCALAPPDATA' in os.environ.keys():
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# Python 2.x does not return unicode env. Use Python 3.x
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self.kobodir = winreg.ExpandEnvironmentStrings(u"%LOCALAPPDATA%")
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if (self.kobodir == u""):
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if 'USERPROFILE' in os.environ.keys():
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# Python 2.x does not return unicode env. Use Python 3.x
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self.kobodir = os.path.join(winreg.ExpandEnvironmentStrings(u"%USERPROFILE%"), u"Local Settings", u"Application Data")
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self.kobodir = os.path.join(self.kobodir, u"Kobo", u"Kobo Desktop Edition")
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elif sys.platform.startswith('darwin'):
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self.kobodir = os.path.join(os.environ['HOME'], u"Library", u"Application Support", u"Kobo", u"Kobo Desktop Edition")
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#elif linux_path != None:
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# Probably Linux, let's get the wine prefix and path to Kobo.
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# self.kobodir = os.path.join(linux_path, u"Local Settings", u"Application Data", u"Kobo", u"Kobo Desktop Edition")
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# desktop versions use Kobo.sqlite
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kobodb = os.path.join(self.kobodir, u"Kobo.sqlite")
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# check for existence of file
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if (not(os.path.isfile(kobodb))):
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# give up here, we haven't found anything useful
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self.kobodir = u""
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kobodb = u""
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if (self.kobodir != u""):
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self.bookdir = os.path.join(self.kobodir, u"kepub")
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# make a copy of the database in a temporary file
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# so we can ensure it's not using WAL logging which sqlite3 can't do.
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self.newdb = tempfile.NamedTemporaryFile(mode='wb', delete=False)
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print(self.newdb.name)
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olddb = open(kobodb, 'rb')
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self.newdb.write(olddb.read(18))
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self.newdb.write('\x01\x01')
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olddb.read(2)
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self.newdb.write(olddb.read())
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olddb.close()
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self.newdb.close()
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self.__sqlite = sqlite3.connect(self.newdb.name)
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self.__cursor = self.__sqlite.cursor()
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self._userkeys = []
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self._books = []
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self._volumeID = []
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self._serials = serials
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def close (self):
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"""Closes the database used by the library."""
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self.__cursor.close()
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self.__sqlite.close()
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# delete the temporary copy of the database
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os.remove(self.newdb.name)
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@property
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def userkeys (self):
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"""The list of potential userkeys being used by this library.
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Only one of these will be valid.
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"""
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if len(self._userkeys) != 0:
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return self._userkeys
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for macaddr in self.__getmacaddrs():
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self._userkeys.extend(self.__getuserkeys(macaddr))
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return self._userkeys
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@property
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def books (self):
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"""The list of KoboBook objects in the library."""
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if len(self._books) != 0:
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return self._books
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"""Drm-ed kepub"""
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for row in self.__cursor.execute('SELECT DISTINCT volumeid, Title, Attribution, Series FROM content_keys, content WHERE contentid = volumeid'):
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self._books.append(KoboBook(row[0], row[1], self.__bookfile(row[0]), 'kepub', self.__cursor, author=row[2], series=row[3]))
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self._volumeID.append(row[0])
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"""Drm-free"""
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for f in os.listdir(self.bookdir):
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if(f not in self._volumeID):
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row = self.__cursor.execute("SELECT Title, Attribution, Series FROM content WHERE ContentID = '" + f + "'").fetchone()
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if row is not None:
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fTitle = row[0]
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self._books.append(KoboBook(f, fTitle, self.__bookfile(f), 'drm-free', self.__cursor, author=row[1], series=row[2]))
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self._volumeID.append(f)
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"""Sort"""
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self._books.sort(key=lambda x: x.title)
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return self._books
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def __bookfile (self, volumeid):
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"""The filename needed to open a given book."""
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return os.path.join(self.kobodir, u"kepub", volumeid)
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def __getmacaddrs (self):
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"""The list of all MAC addresses on this machine."""
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macaddrs = []
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if sys.platform.startswith('win'):
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c = re.compile('\s(' + '[0-9a-f]{2}-' * 5 + '[0-9a-f]{2})(\s|$)', re.IGNORECASE)
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(p_in, p_out, p_err) = os.popen3('ipconfig /all')
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for line in p_out:
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m = c.search(line)
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if m:
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macaddrs.append(re.sub("-", ":", m.group(1)).upper())
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elif sys.platform.startswith('darwin'):
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c = re.compile('\s(' + '[0-9a-f]{2}:' * 5 + '[0-9a-f]{2})(\s|$)', re.IGNORECASE)
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output = subprocess.check_output('/sbin/ifconfig -a', shell=True)
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matches = c.findall(output)
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for m in matches:
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# print u"m:{0}".format(m[0])
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macaddrs.append(m[0].upper())
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else:
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# probably linux
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# let's try ip
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c = re.compile('\s(' + '[0-9a-f]{2}:' * 5 + '[0-9a-f]{2})(\s|$)', re.IGNORECASE)
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for line in os.popen('ip -br link'):
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m = c.search(line)
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if m:
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macaddrs.append(m.group(1).upper())
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# let's try ipconfig under wine
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c = re.compile('\s(' + '[0-9a-f]{2}-' * 5 + '[0-9a-f]{2})(\s|$)', re.IGNORECASE)
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for line in os.popen('ipconfig /all'):
|
|
m = c.search(line)
|
|
if m:
|
|
macaddrs.append(re.sub("-", ":", m.group(1)).upper())
|
|
|
|
# extend the list of macaddrs in any case with the serials
|
|
# cannot hurt ;-)
|
|
macaddrs.extend(self._serials)
|
|
|
|
return macaddrs
|
|
|
|
def __getuserids (self):
|
|
userids = []
|
|
cursor = self.__cursor.execute('SELECT UserID FROM user')
|
|
row = cursor.fetchone()
|
|
while row is not None:
|
|
try:
|
|
userid = row[0]
|
|
userids.append(userid)
|
|
except:
|
|
pass
|
|
row = cursor.fetchone()
|
|
return userids
|
|
|
|
def __getuserkeys (self, macaddr):
|
|
userids = self.__getuserids()
|
|
userkeys = []
|
|
for hash in KOBO_HASH_KEYS:
|
|
deviceid = hashlib.sha256(hash + macaddr).hexdigest()
|
|
for userid in userids:
|
|
userkey = hashlib.sha256(deviceid + userid).hexdigest()
|
|
userkeys.append(binascii.a2b_hex(userkey[32:]))
|
|
return userkeys
|
|
|
|
class KoboBook(object):
|
|
"""A Kobo book.
|
|
|
|
A Kobo book contains a number of unencrypted and encrypted files.
|
|
This class provides a list of the encrypted files.
|
|
|
|
Each book has the following instance variables:
|
|
volumeid - a UUID which uniquely refers to the book in this library.
|
|
title - the human-readable book title.
|
|
filename - the complete path and filename of the book.
|
|
type - either kepub or drm-free"""
|
|
def __init__ (self, volumeid, title, filename, type, cursor, author=None, series=None):
|
|
self.volumeid = volumeid
|
|
self.title = title
|
|
self.author = author
|
|
self.series = series
|
|
self.series_index = None
|
|
self.filename = filename
|
|
self.type = type
|
|
self.__cursor = cursor
|
|
self._encryptedfiles = {}
|
|
|
|
@property
|
|
def encryptedfiles (self):
|
|
"""A dictionary of KoboFiles inside the book.
|
|
|
|
The dictionary keys are the relative pathnames, which are
|
|
the same as the pathnames inside the book 'zip' file."""
|
|
if (self.type == 'drm-free'):
|
|
return self._encryptedfiles
|
|
if len(self._encryptedfiles) != 0:
|
|
return self._encryptedfiles
|
|
# Read the list of encrypted files from the DB
|
|
for row in self.__cursor.execute('SELECT elementid,elementkey FROM content_keys,content WHERE volumeid = ? AND volumeid = contentid',(self.volumeid,)):
|
|
self._encryptedfiles[row[0]] = KoboFile(row[0], None, base64.b64decode(row[1]))
|
|
|
|
# Read the list of files from the kepub OPF manifest so that
|
|
# we can get their proper MIME type.
|
|
# NOTE: this requires that the OPF file is unencrypted!
|
|
zin = zipfile.ZipFile(self.filename, "r")
|
|
xmlns = {
|
|
'ocf': 'urn:oasis:names:tc:opendocument:xmlns:container',
|
|
'opf': 'http://www.idpf.org/2007/opf'
|
|
}
|
|
ocf = ET.fromstring(zin.read('META-INF/container.xml'))
|
|
opffile = ocf.find('.//ocf:rootfile', xmlns).attrib['full-path']
|
|
basedir = re.sub('[^/]+$', '', opffile)
|
|
opf = ET.fromstring(zin.read(opffile))
|
|
zin.close()
|
|
|
|
c = re.compile('/')
|
|
for item in opf.findall('.//opf:item', xmlns):
|
|
mimetype = item.attrib['media-type']
|
|
|
|
# Convert relative URIs
|
|
href = item.attrib['href']
|
|
if not c.match(href):
|
|
href = string.join((basedir, href), '')
|
|
|
|
# Update books we've found from the DB.
|
|
if href in self._encryptedfiles:
|
|
self._encryptedfiles[href].mimetype = mimetype
|
|
return self._encryptedfiles
|
|
|
|
@property
|
|
def has_drm (self):
|
|
return not self.type == 'drm-free'
|
|
|
|
|
|
class KoboFile(object):
|
|
"""An encrypted file in a KoboBook.
|
|
|
|
Each file has the following instance variables:
|
|
filename - the relative pathname inside the book zip file.
|
|
mimetype - the file's MIME type, e.g. 'image/jpeg'
|
|
key - the encrypted page key."""
|
|
|
|
def __init__ (self, filename, mimetype, key):
|
|
self.filename = filename
|
|
self.mimetype = mimetype
|
|
self.key = key
|
|
def decrypt (self, userkey, contents):
|
|
"""
|
|
Decrypt the contents using the provided user key and the
|
|
file page key. The caller must determine if the decrypted
|
|
data is correct."""
|
|
# The userkey decrypts the page key (self.key)
|
|
keyenc = AES(userkey)
|
|
decryptedkey = keyenc.decrypt(self.key)
|
|
# The decrypted page key decrypts the content
|
|
pageenc = AES(decryptedkey)
|
|
return self.__removeaespadding(pageenc.decrypt(contents))
|
|
|
|
def check (self, contents):
|
|
"""
|
|
If the contents uses some known MIME types, check if it
|
|
conforms to the type. Throw a ValueError exception if not.
|
|
If the contents uses an uncheckable MIME type, don't check
|
|
it and don't throw an exception.
|
|
Returns True if the content was checked, False if it was not
|
|
checked."""
|
|
if self.mimetype == 'application/xhtml+xml':
|
|
# assume utf-8 with no BOM
|
|
textoffset = 0
|
|
stride = 1
|
|
print(u"Checking text:{0}:".format(contents[:10]))
|
|
# check for byte order mark
|
|
if contents[:3]=="\xef\xbb\xbf":
|
|
# seems to be utf-8 with BOM
|
|
print(u"Could be utf-8 with BOM")
|
|
textoffset = 3
|
|
elif contents[:2]=="\xfe\xff":
|
|
# seems to be utf-16BE
|
|
print(u"Could be utf-16BE")
|
|
textoffset = 3
|
|
stride = 2
|
|
elif contents[:2]=="\xff\xfe":
|
|
# seems to be utf-16LE
|
|
print(u"Could be utf-16LE")
|
|
textoffset = 2
|
|
stride = 2
|
|
else:
|
|
print(u"Perhaps utf-8 without BOM")
|
|
|
|
# now check that the first few characters are in the ASCII range
|
|
for i in xrange(textoffset,textoffset+5*stride,stride):
|
|
if ord(contents[i])<32 or ord(contents[i])>127:
|
|
# Non-ascii, so decryption probably failed
|
|
print(u"Bad character at {0}, value {1}".format(i,ord(contents[i])))
|
|
raise ValueError
|
|
print(u"Seems to be good text")
|
|
return True
|
|
if contents[:5]=="<?xml" or contents[:8]=="\xef\xbb\xbf<?xml":
|
|
# utf-8
|
|
return True
|
|
elif contents[:14]=="\xfe\xff\x00<\x00?\x00x\x00m\x00l":
|
|
# utf-16BE
|
|
return True
|
|
elif contents[:14]=="\xff\xfe<\x00?\x00x\x00m\x00l\x00":
|
|
# utf-16LE
|
|
return True
|
|
elif contents[:9]=="<!DOCTYPE" or contents[:12]=="\xef\xbb\xbf<!DOCTYPE":
|
|
# utf-8 of weird <!DOCTYPE start
|
|
return True
|
|
elif contents[:22]=="\xfe\xff\x00<\x00!\x00D\x00O\x00C\x00T\x00Y\x00P\x00E":
|
|
# utf-16BE of weird <!DOCTYPE start
|
|
return True
|
|
elif contents[:22]=="\xff\xfe<\x00!\x00D\x00O\x00C\x00T\x00Y\x00P\x00E\x00":
|
|
# utf-16LE of weird <!DOCTYPE start
|
|
return True
|
|
else:
|
|
print(u"Bad XML: {0}".format(contents[:8]))
|
|
raise ValueError
|
|
elif self.mimetype == 'image/jpeg':
|
|
if contents[:3] == '\xff\xd8\xff':
|
|
return True
|
|
else:
|
|
print(u"Bad JPEG: {0}".format(contents[:3].encode('hex')))
|
|
raise ValueError()
|
|
return False
|
|
|
|
def __removeaespadding (self, contents):
|
|
"""
|
|
Remove the trailing padding, using what appears to be the CMS
|
|
algorithm from RFC 5652 6.3"""
|
|
lastchar = binascii.b2a_hex(contents[-1:])
|
|
strlen = int(lastchar, 16)
|
|
padding = strlen
|
|
if strlen == 1:
|
|
return contents[:-1]
|
|
if strlen < 16:
|
|
for i in range(strlen):
|
|
testchar = binascii.b2a_hex(contents[-strlen:-(strlen-1)])
|
|
if testchar != lastchar:
|
|
padding = 0
|
|
if padding > 0:
|
|
contents = contents[:-padding]
|
|
return contents
|
|
|
|
def decrypt_book(book, lib):
|
|
print(u"Converting {0}".format(book.title))
|
|
zin = zipfile.ZipFile(book.filename, "r")
|
|
# make filename out of Unicode alphanumeric and whitespace equivalents from title
|
|
outname = u"{0}.epub".format(re.sub('[^\s\w]', '_', book.title, 0, re.UNICODE))
|
|
if (book.type == 'drm-free'):
|
|
print(u"DRM-free book, conversion is not needed")
|
|
shutil.copyfile(book.filename, outname)
|
|
print(u"Book saved as {0}".format(os.path.join(os.getcwd(), outname)))
|
|
return 0
|
|
result = 1
|
|
for userkey in lib.userkeys:
|
|
print(u"Trying key: {0}".format(userkey.encode('hex_codec')))
|
|
try:
|
|
zout = zipfile.ZipFile(outname, "w", zipfile.ZIP_DEFLATED)
|
|
for filename in zin.namelist():
|
|
contents = zin.read(filename)
|
|
if filename in book.encryptedfiles:
|
|
file = book.encryptedfiles[filename]
|
|
contents = file.decrypt(userkey, contents)
|
|
# Parse failures mean the key is probably wrong.
|
|
file.check(contents)
|
|
zout.writestr(filename, contents)
|
|
zout.close()
|
|
print(u"Decryption succeeded.")
|
|
print(u"Book saved as {0}".format(os.path.join(os.getcwd(), outname)))
|
|
result = 0
|
|
break
|
|
except ValueError:
|
|
print(u"Decryption failed.")
|
|
zout.close()
|
|
os.remove(outname)
|
|
zin.close()
|
|
return result
|
|
|
|
|
|
def cli_main():
|
|
description = __about__
|
|
epilog = u"Parsing of arguments failed."
|
|
parser = argparse.ArgumentParser(prog=sys.argv[0], description=description, epilog=epilog)
|
|
parser.add_argument('--devicedir', default='/media/KOBOeReader', help="directory of connected Kobo device")
|
|
parser.add_argument('--all', action='store_true', help="flag for converting all books on device")
|
|
args = vars(parser.parse_args())
|
|
serials = []
|
|
devicedir = u""
|
|
if args['devicedir']:
|
|
devicedir = args['devicedir']
|
|
|
|
lib = KoboLibrary(serials, devicedir)
|
|
|
|
if args['all']:
|
|
books = lib.books
|
|
else:
|
|
for i, book in enumerate(lib.books):
|
|
print(u"{0}: {1}".format(i + 1, book.title))
|
|
print(u"Or 'all'")
|
|
|
|
choice = raw_input(u"Convert book number... ")
|
|
if choice == u'all':
|
|
books = list(lib.books)
|
|
else:
|
|
try:
|
|
num = int(choice)
|
|
books = [lib.books[num - 1]]
|
|
except (ValueError, IndexError):
|
|
print(u"Invalid choice. Exiting...")
|
|
exit()
|
|
|
|
results = [decrypt_book(book, lib) for book in books]
|
|
lib.close()
|
|
overall_result = all(result != 0 for result in results)
|
|
if overall_result != 0:
|
|
print(u"Could not decrypt book with any of the keys found.")
|
|
return overall_result
|
|
|
|
|
|
if __name__ == '__main__':
|
|
sys.stdout=SafeUnbuffered(sys.stdout)
|
|
sys.stderr=SafeUnbuffered(sys.stderr)
|
|
sys.exit(cli_main())
|