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Cleanup

This commit is contained in:
NoDRM 2021-12-29 09:14:35 +01:00
parent 80f511ade9
commit 9c40b3ce5a
9 changed files with 24 additions and 463 deletions
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4
.gitignore vendored
View File

@ -3,3 +3,7 @@
# local test data
/user_data/
# Cache
/DeDRM_plugin/__pycache__
/DeDRM_plugin/standalone/__pycache__

6
CALIBRE_CLI_INSTRUCTIONS.md
View File

@ -13,16 +13,16 @@ platforms.
#### Install plugins
- Download the DeDRM `.zip` archive from DeDRM_tools'
[latest release](https://github.com/apprenticeharper/DeDRM_tools/releases/latest).
[latest release](https://github.com/noDRM/DeDRM_tools/releases/latest).
Then unzip it.
- Add the DeDRM plugin to Calibre:
```
cd *the unzipped DeDRM_tools folder*
calibre-customize --add DeDRM_calibre_plugin/DeDRM_plugin.zip
calibre-customize --add DeDRM_plugin.zip
```
- Add the Obok plugin:
```
calibre-customize --add Obok_calibre_plugin/obok_plugin.zip
calibre-customize --add Obok_plugin.zip
```
#### Enter your keys

2
DeDRM_plugin/DeDRM_Help.htm
View File

@ -46,7 +46,7 @@ p {margin-top: 0}
<h3>Credits:</h3>
<ul>
<li>NoDRM for a bunch of updates and the Readium LCP support</li>
<li>NoDRM for a bunch of updates and maintenance since November 2021, and the Readium LCP support</li>
<li>The Dark Reverser for the Mobipocket and eReader scripts</li>
<li>i♥cabbages for the Adobe Digital Editions scripts</li>
<li>Skindle aka Bart Simpson for the Amazon Kindle for PC script</li>

4
DeDRM_plugin/__init__.py
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@ -994,11 +994,11 @@ class DeDRM(FileTypePlugin):
decrypted_ebook = self.eReaderDecrypt(path_to_ebook)
pass
elif booktype == 'pdf':
# Adobe PDF (hopefully)
# Adobe PDF (hopefully) or LCP PDF
decrypted_ebook = self.PDFDecrypt(path_to_ebook)
pass
elif booktype == 'epub':
# Adobe Adept or B&N ePub
# Adobe Adept, PassHash (B&N) or LCP ePub
decrypted_ebook = self.ePubDecrypt(path_to_ebook)
else:
print("Unknown booktype {0}. Passing back to calibre unchanged".format(booktype))

2
DeDRM_plugin/activitybar.py → DeDRM_plugin/_unused_activitybar.py
View File

@ -1,3 +1,5 @@
# I think this file is unused?
import sys
import tkinter
import tkinter.constants

3
DeDRM_plugin/scrolltextwidget.py → DeDRM_plugin/_unused_scrolltextwidget.py
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@ -1,6 +1,9 @@
#!/usr/bin/env python
# vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab
# I think this file is unused?
import tkinter
import tkinter.constants

448
DeDRM_plugin/ignobleepub.py
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@ -1,448 +0,0 @@
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# ignobleepub.py
# Copyright © 2009-2020 by i♥cabbages, Apprentice Harper et al.
# Released under the terms of the GNU General Public Licence, version 3
# <http://www.gnu.org/licenses/>
#
# Revision history:
# 1 - Initial release
# 2 - Added OS X support by using OpenSSL when available
# 3 - screen out improper key lengths to prevent segfaults on Linux
# 3.1 - Allow Windows versions of libcrypto to be found
# 3.2 - add support for encoding to 'utf-8' when building up list of files to decrypt from encryption.xml
# 3.3 - On Windows try PyCrypto first, OpenSSL next
# 3.4 - Modify interface to allow use with import
# 3.5 - Fix for potential problem with PyCrypto
# 3.6 - Revised to allow use in calibre plugins to eliminate need for duplicate code
# 3.7 - Tweaked to match ineptepub more closely
# 3.8 - Fixed to retain zip file metadata (e.g. file modification date)
# 3.9 - moved unicode_argv call inside main for Windows DeDRM compatibility
# 4.0 - Work if TkInter is missing
# 4.1 - Import tkFileDialog, don't assume something else will import it.
# 5.0 - Python 3 for calibre 5.0
"""
Decrypt Barnes & Noble encrypted ePub books.
"""
__license__ = 'GPL v3'
__version__ = "5.0"
import sys
import os
import traceback
import base64
import zlib
import zipfile
from zipfile import ZipInfo, ZipFile, ZIP_STORED, ZIP_DEFLATED
from contextlib import closing
import xml.etree.ElementTree as etree
# Wrap a stream so that output gets flushed immediately
# and also make sure that any unicode strings get
# encoded using "replace" before writing them.
class SafeUnbuffered:
def __init__(self, stream):
self.stream = stream
self.encoding = stream.encoding
if self.encoding == None:
self.encoding = "utf-8"
def write(self, data):
if isinstance(data,str) or isinstance(data,unicode):
# str for Python3, unicode for Python2
data = data.encode(self.encoding,"replace")
try:
buffer = getattr(self.stream, 'buffer', self.stream)
# self.stream.buffer for Python3, self.stream for Python2
buffer.write(data)
buffer.flush()
except:
# We can do nothing if a write fails
raise
def __getattr__(self, attr):
return getattr(self.stream, attr)
try:
from calibre.constants import iswindows, isosx
except:
iswindows = sys.platform.startswith('win')
isosx = sys.platform.startswith('darwin')
def unicode_argv():
if iswindows:
# Uses shell32.GetCommandLineArgvW to get sys.argv as a list of Unicode
# strings.
# Versions 2.x of Python don't support Unicode in sys.argv on
# Windows, with the underlying Windows API instead replacing multi-byte
# characters with '?'.
from ctypes import POINTER, byref, cdll, c_int, windll
from ctypes.wintypes import LPCWSTR, LPWSTR
GetCommandLineW = cdll.kernel32.GetCommandLineW
GetCommandLineW.argtypes = []
GetCommandLineW.restype = LPCWSTR
CommandLineToArgvW = windll.shell32.CommandLineToArgvW
CommandLineToArgvW.argtypes = [LPCWSTR, POINTER(c_int)]
CommandLineToArgvW.restype = POINTER(LPWSTR)
cmd = GetCommandLineW()
argc = c_int(0)
argv = CommandLineToArgvW(cmd, byref(argc))
if argc.value > 0:
# Remove Python executable and commands if present
start = argc.value - len(sys.argv)
return [argv[i] for i in
range(start, argc.value)]
return ["ineptepub.py"]
else:
argvencoding = sys.stdin.encoding or "utf-8"
return [arg if (isinstance(arg, str) or isinstance(arg,unicode)) else str(arg, argvencoding) for arg in sys.argv]
class IGNOBLEError(Exception):
pass
def _load_crypto_libcrypto():
from ctypes import CDLL, POINTER, c_void_p, c_char_p, c_int, c_long, \
Structure, c_ulong, create_string_buffer, cast
from ctypes.util import find_library
if iswindows:
libcrypto = find_library('libeay32')
else:
libcrypto = find_library('crypto')
if libcrypto is None:
raise IGNOBLEError('libcrypto not found')
libcrypto = CDLL(libcrypto)
AES_MAXNR = 14
c_char_pp = POINTER(c_char_p)
c_int_p = POINTER(c_int)
class AES_KEY(Structure):
_fields_ = [('rd_key', c_long * (4 * (AES_MAXNR + 1))),
('rounds', c_int)]
AES_KEY_p = POINTER(AES_KEY)
def F(restype, name, argtypes):
func = getattr(libcrypto, name)
func.restype = restype
func.argtypes = argtypes
return func
AES_set_decrypt_key = F(c_int, 'AES_set_decrypt_key',
[c_char_p, c_int, AES_KEY_p])
AES_cbc_encrypt = F(None, 'AES_cbc_encrypt',
[c_char_p, c_char_p, c_ulong, AES_KEY_p, c_char_p,
c_int])
class AES(object):
def __init__(self, userkey):
self._blocksize = len(userkey)
if (self._blocksize != 16) and (self._blocksize != 24) and (self._blocksize != 32) :
raise IGNOBLEError('AES improper key used')
return
key = self._key = AES_KEY()
rv = AES_set_decrypt_key(userkey, len(userkey) * 8, key)
if rv < 0:
raise IGNOBLEError('Failed to initialize AES key')
def decrypt(self, data):
out = create_string_buffer(len(data))
iv = (b'\x00' * self._blocksize)
rv = AES_cbc_encrypt(data, out, len(data), self._key, iv, 0)
if rv == 0:
raise IGNOBLEError('AES decryption failed')
return out.raw
return AES
def _load_crypto_pycrypto():
from Crypto.Cipher import AES as _AES
class AES(object):
def __init__(self, key):
self._aes = _AES.new(key, _AES.MODE_CBC, b'\x00'*16)
def decrypt(self, data):
return self._aes.decrypt(data)
return AES
def _load_crypto():
AES = None
cryptolist = (_load_crypto_libcrypto, _load_crypto_pycrypto)
if sys.platform.startswith('win'):
cryptolist = (_load_crypto_pycrypto, _load_crypto_libcrypto)
for loader in cryptolist:
try:
AES = loader()
break
except (ImportError, IGNOBLEError):
pass
return AES
AES = _load_crypto()
META_NAMES = ('mimetype', 'META-INF/rights.xml', 'META-INF/encryption.xml')
NSMAP = {'adept': 'http://ns.adobe.com/adept',
'enc': 'http://www.w3.org/2001/04/xmlenc#'}
class Decryptor(object):
def __init__(self, bookkey, encryption):
enc = lambda tag: '{%s}%s' % (NSMAP['enc'], tag)
self._aes = AES(bookkey)
encryption = etree.fromstring(encryption)
self._encrypted = encrypted = set()
expr = './%s/%s/%s' % (enc('EncryptedData'), enc('CipherData'),
enc('CipherReference'))
for elem in encryption.findall(expr):
path = elem.get('URI', None)
if path is not None:
path = path.encode('utf-8')
encrypted.add(path)
def decompress(self, bytes):
dc = zlib.decompressobj(-15)
bytes = dc.decompress(bytes)
ex = dc.decompress(b'Z') + dc.flush()
if ex:
bytes = bytes + ex
return bytes
def decrypt(self, path, data):
if bytes(path,'utf-8') in self._encrypted:
data = self._aes.decrypt(data)[16:]
data = data[:-data[-1]]
data = self.decompress(data)
return data
# check file to make check whether it's probably an Adobe Adept encrypted ePub
def ignobleBook(inpath):
with closing(ZipFile(open(inpath, 'rb'))) as inf:
namelist = set(inf.namelist())
if 'META-INF/rights.xml' not in namelist or \
'META-INF/encryption.xml' not in namelist:
return False
try:
rights = etree.fromstring(inf.read('META-INF/rights.xml'))
adept = lambda tag: '{%s}%s' % (NSMAP['adept'], tag)
expr = './/%s' % (adept('encryptedKey'),)
bookkey = ''.join(rights.findtext(expr))
if len(bookkey) == 64:
return True
except:
# if we couldn't check, assume it is
return True
return False
def decryptBook(keyb64, inpath, outpath):
if AES is None:
raise IGNOBLEError("PyCrypto or OpenSSL must be installed.")
key = base64.b64decode(keyb64)[:16]
aes = AES(key)
with closing(ZipFile(open(inpath, 'rb'))) as inf:
namelist = set(inf.namelist())
if 'META-INF/rights.xml' not in namelist or \
'META-INF/encryption.xml' not in namelist:
print("{0:s} is DRM-free.".format(os.path.basename(inpath)))
return 1
for name in META_NAMES:
namelist.remove(name)
try:
rights = etree.fromstring(inf.read('META-INF/rights.xml'))
adept = lambda tag: '{%s}%s' % (NSMAP['adept'], tag)
expr = './/%s' % (adept('encryptedKey'),)
bookkey = ''.join(rights.findtext(expr))
if len(bookkey) != 64:
print("{0:s} is not a secure Barnes & Noble ePub.".format(os.path.basename(inpath)))
return 1
bookkey = aes.decrypt(base64.b64decode(bookkey))
bookkey = bookkey[:-bookkey[-1]]
encryption = inf.read('META-INF/encryption.xml')
decryptor = Decryptor(bookkey[-16:], encryption)
kwds = dict(compression=ZIP_DEFLATED, allowZip64=False)
with closing(ZipFile(open(outpath, 'wb'), 'w', **kwds)) as outf:
zi = ZipInfo('mimetype')
zi.compress_type=ZIP_STORED
try:
# if the mimetype is present, get its info, including time-stamp
oldzi = inf.getinfo('mimetype')
# copy across fields to be preserved
zi.date_time = oldzi.date_time
zi.comment = oldzi.comment
zi.extra = oldzi.extra
zi.internal_attr = oldzi.internal_attr
# external attributes are dependent on the create system, so copy both.
zi.external_attr = oldzi.external_attr
zi.create_system = oldzi.create_system
except:
pass
outf.writestr(zi, inf.read('mimetype'))
for path in namelist:
data = inf.read(path)
zi = ZipInfo(path)
zi.compress_type=ZIP_DEFLATED
try:
# get the file info, including time-stamp
oldzi = inf.getinfo(path)
# copy across useful fields
zi.date_time = oldzi.date_time
zi.comment = oldzi.comment
zi.extra = oldzi.extra
zi.internal_attr = oldzi.internal_attr
# external attributes are dependent on the create system, so copy both.
zi.external_attr = oldzi.external_attr
zi.create_system = oldzi.create_system
except:
pass
outf.writestr(zi, decryptor.decrypt(path, data))
except:
print("Could not decrypt {0:s} because of an exception:\n{1:s}".format(os.path.basename(inpath), traceback.format_exc()))
return 2
return 0
def cli_main():
sys.stdout=SafeUnbuffered(sys.stdout)
sys.stderr=SafeUnbuffered(sys.stderr)
argv=unicode_argv()
progname = os.path.basename(argv[0])
if len(argv) != 4:
print("usage: {0} <keyfile.b64> <inbook.epub> <outbook.epub>".format(progname))
return 1
keypath, inpath, outpath = argv[1:]
userkey = open(keypath,'rb').read()
result = decryptBook(userkey, inpath, outpath)
if result == 0:
print("Successfully decrypted {0:s} as {1:s}".format(os.path.basename(inpath),os.path.basename(outpath)))
return result
def gui_main():
try:
import tkinter
import tkinter.constants
import tkinter.filedialog
import tkinter.messagebox
import traceback
except:
return cli_main()
class DecryptionDialog(tkinter.Frame):
def __init__(self, root):
tkinter.Frame.__init__(self, root, border=5)
self.status = tkinter.Label(self, text="Select files for decryption")
self.status.pack(fill=tkinter.constants.X, expand=1)
body = tkinter.Frame(self)
body.pack(fill=tkinter.constants.X, expand=1)
sticky = tkinter.constants.E + tkinter.constants.W
body.grid_columnconfigure(1, weight=2)
tkinter.Label(body, text="Key file").grid(row=0)
self.keypath = tkinter.Entry(body, width=30)
self.keypath.grid(row=0, column=1, sticky=sticky)
if os.path.exists("bnepubkey.b64"):
self.keypath.insert(0, "bnepubkey.b64")
button = tkinter.Button(body, text="...", command=self.get_keypath)
button.grid(row=0, column=2)
tkinter.Label(body, text="Input file").grid(row=1)
self.inpath = tkinter.Entry(body, width=30)
self.inpath.grid(row=1, column=1, sticky=sticky)
button = tkinter.Button(body, text="...", command=self.get_inpath)
button.grid(row=1, column=2)
tkinter.Label(body, text="Output file").grid(row=2)
self.outpath = tkinter.Entry(body, width=30)
self.outpath.grid(row=2, column=1, sticky=sticky)
button = tkinter.Button(body, text="...", command=self.get_outpath)
button.grid(row=2, column=2)
buttons = tkinter.Frame(self)
buttons.pack()
botton = tkinter.Button(
buttons, text="Decrypt", width=10, command=self.decrypt)
botton.pack(side=tkinter.constants.LEFT)
tkinter.Frame(buttons, width=10).pack(side=tkinter.constants.LEFT)
button = tkinter.Button(
buttons, text="Quit", width=10, command=self.quit)
button.pack(side=tkinter.constants.RIGHT)
def get_keypath(self):
keypath = tkinter.filedialog.askopenfilename(
parent=None, title="Select Barnes & Noble \'.b64\' key file",
defaultextension=".b64",
filetypes=[('base64-encoded files', '.b64'),
('All Files', '.*')])
if keypath:
keypath = os.path.normpath(keypath)
self.keypath.delete(0, tkinter.constants.END)
self.keypath.insert(0, keypath)
return
def get_inpath(self):
inpath = tkinter.filedialog.askopenfilename(
parent=None, title="Select B&N-encrypted ePub file to decrypt",
defaultextension=".epub", filetypes=[('ePub files', '.epub')])
if inpath:
inpath = os.path.normpath(inpath)
self.inpath.delete(0, tkinter.constants.END)
self.inpath.insert(0, inpath)
return
def get_outpath(self):
outpath = tkinter.filedialog.asksaveasfilename(
parent=None, title="Select unencrypted ePub file to produce",
defaultextension=".epub", filetypes=[('ePub files', '.epub')])
if outpath:
outpath = os.path.normpath(outpath)
self.outpath.delete(0, tkinter.constants.END)
self.outpath.insert(0, outpath)
return
def decrypt(self):
keypath = self.keypath.get()
inpath = self.inpath.get()
outpath = self.outpath.get()
if not keypath or not os.path.exists(keypath):
self.status['text'] = "Specified key file does not exist"
return
if not inpath or not os.path.exists(inpath):
self.status['text'] = "Specified input file does not exist"
return
if not outpath:
self.status['text'] = "Output file not specified"
return
if inpath == outpath:
self.status['text'] = "Must have different input and output files"
return
userkey = open(keypath,'rb').read()
self.status['text'] = "Decrypting..."
try:
decrypt_status = decryptBook(userkey, inpath, outpath)
except Exception as e:
self.status['text'] = "Error: {0}".format(e.args[0])
return
if decrypt_status == 0:
self.status['text'] = "File successfully decrypted"
else:
self.status['text'] = "The was an error decrypting the file."
root = tkinter.Tk()
root.title("Barnes & Noble ePub Decrypter v.{0}".format(__version__))
root.resizable(True, False)
root.minsize(300, 0)
DecryptionDialog(root).pack(fill=tkinter.constants.X, expand=1)
root.mainloop()
return 0
if __name__ == '__main__':
if len(sys.argv) > 1:
sys.exit(cli_main())
sys.exit(gui_main())

12
DeDRM_plugin/scriptinterface.py
View File

@ -50,8 +50,8 @@ def decryptepub(infile, outdir, rscpath):
errlog += traceback.format_exc()
errlog += str(e)
rv = 1
# now try with ignoble epub
elif ignobleepub.ignobleBook(zippath):
# now try with ignoble epub
# try with any keyfiles (*.b64) in the rscpath
files = os.listdir(rscpath)
filefilter = re.compile("\.b64$", re.IGNORECASE)
@ -62,7 +62,7 @@ def decryptepub(infile, outdir, rscpath):
userkey = open(keypath,'r').read()
#print userkey
try:
rv = ignobleepub.decryptBook(userkey, zippath, outfile)
rv = ineptepub.decryptBook(userkey, zippath, outfile)
if rv == 0:
print("Decrypted B&N ePub with key file {0}".format(filename))
break
@ -121,7 +121,7 @@ def decryptpdb(infile, outdir, rscpath):
rv = 1
socialpath = os.path.join(rscpath,'sdrmlist.txt')
if os.path.exists(socialpath):
keydata = file(socialpath,'r').read()
keydata = open(socialpath,'r').read()
keydata = keydata.rstrip(os.linesep)
ar = keydata.split(',')
for i in ar:
@ -148,7 +148,7 @@ def decryptk4mobi(infile, outdir, rscpath):
pidnums = []
pidspath = os.path.join(rscpath,'pidlist.txt')
if os.path.exists(pidspath):
pidstr = file(pidspath,'r').read()
pidstr = open(pidspath,'r').read()
pidstr = pidstr.rstrip(os.linesep)
pidstr = pidstr.strip()
if pidstr != '':
@ -156,7 +156,7 @@ def decryptk4mobi(infile, outdir, rscpath):
serialnums = []
serialnumspath = os.path.join(rscpath,'seriallist.txt')
if os.path.exists(serialnumspath):
serialstr = file(serialnumspath,'r').read()
serialstr = open(serialnumspath,'r').read()
serialstr = serialstr.rstrip(os.linesep)
serialstr = serialstr.strip()
if serialstr != '':

4
DeDRM_plugin/topazextract.py
View File

@ -332,7 +332,7 @@ class TopazBook:
keydata = self.getBookPayloadRecord(b'dkey', 0)
except DrmException as e:
print("no dkey record found, book may not be encrypted")
print("attempting to extrct files without a book key")
print("attempting to extract files without a book key")
self.createBookDirectory()
self.extractFiles()
print("Successfully Extracted Topaz contents")
@ -364,7 +364,7 @@ class TopazBook:
break
if not bookKey:
raise DrmException("No key found in {0:d} keys tried. Read the FAQs at Harper's repository: https://github.com/apprenticeharper/DeDRM_tools/blob/master/FAQs.md".format(len(pidlst)))
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)))
self.setBookKey(bookKey)
self.createBookDirectory()