DeDRM_tools/DeDRM_plugin/ignoblekeygen.py

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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
# ignoblekeygen.py
# Copyright © 2009-2020 i♥cabbages, Apprentice Harper et al.
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# Released under the terms of the GNU General Public Licence, version 3
# <http://www.gnu.org/licenses/>
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# Windows users: Before running this program, you must first install Python.
# We recommend ActiveState Python 2.7.X for Windows (x86) from
# http://www.activestate.com/activepython/downloads.
# You must also install PyCrypto from
# http://www.voidspace.org.uk/python/modules.shtml#pycrypto
# (make certain to install the version for Python 2.7).
# Then save this script file as ignoblekeygen.pyw and double-click on it to run it.
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#
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# Mac OS X users: Save this script file as ignoblekeygen.pyw. You can run this
# program from the command line (python ignoblekeygen.pyw) or by double-clicking
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# it when it has been associated with PythonLauncher.
# Revision history:
# 1 - Initial release
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# 2 - Add OS X support by using OpenSSL when available (taken/modified from ineptepub v5)
# 2.1 - Allow Windows versions of libcrypto to be found
# 2.2 - On Windows try PyCrypto first and then OpenSSL next
# 2.3 - Modify interface to allow use of import
# 2.4 - Improvements to UI and now works in plugins
# 2.5 - Additional improvement for unicode and plugin support
# 2.6 - moved unicode_argv call inside main for Windows DeDRM compatibility
# 2.7 - Work if TkInter is missing
# 2.8 - Fix bug in stand-alone use (import tkFileDialog)
# 3.0 - Added Python 3 compatibility for calibre 5.0
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"""
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Generate Barnes & Noble EPUB user key from name and credit card number.
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"""
__license__ = 'GPL v3'
__version__ = "3.0"
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import sys
import os
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import hashlib
import base64
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# 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,bytes):
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data = data.encode(self.encoding,"replace")
self.stream.write(data)
self.stream.flush()
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')
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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
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# characters with '?'. So use shell32.GetCommandLineArgvW to get sys.argv
# as a list of Unicode strings and encode them as utf-8
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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)]
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# if we don't have any arguments at all, just pass back script name
# this should never happen
return ["ignoblekeygen.py"]
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else:
argvencoding = sys.stdin.encoding or "utf-8"
return [arg if isinstance(arg, str) else str(arg, argvencoding) for arg in sys.argv]
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class IGNOBLEError(Exception):
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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:
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raise IGNOBLEError('libcrypto not found')
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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
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AES_set_encrypt_key = F(c_int, 'AES_set_encrypt_key',
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[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):
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def __init__(self, userkey, iv):
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self._blocksize = len(userkey)
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self._iv = iv
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key = self._key = AES_KEY()
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rv = AES_set_encrypt_key(userkey, len(userkey) * 8, key)
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if rv < 0:
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raise IGNOBLEError('Failed to initialize AES Encrypt key')
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def encrypt(self, data):
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out = create_string_buffer(len(data))
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rv = AES_cbc_encrypt(data, out, len(data), self._key, self._iv, 1)
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if rv == 0:
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raise IGNOBLEError('AES encryption failed')
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return out.raw
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return AES
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def _load_crypto_pycrypto():
from Crypto.Cipher import AES as _AES
class AES(object):
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def __init__(self, key, iv):
self._aes = _AES.new(key, _AES.MODE_CBC, iv)
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def encrypt(self, data):
return self._aes.encrypt(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_libcrypto, _load_crypto_pycrypto)
if sys.platform.startswith('win'):
cryptolist = (_load_crypto_pycrypto, _load_crypto_libcrypto)
for loader in cryptolist:
try:
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AES = loader()
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break
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except (ImportError, IGNOBLEError):
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pass
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return AES
AES = _load_crypto()
def normalize_name(name):
return ''.join(x for x in name.lower() if x != ' ')
def generate_key(name, ccn):
# remove spaces and case from name and CC numbers.
name = normalize_name(name)
ccn = normalize_name(ccn)
if type(name)==str:
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name = name.encode('utf-8')
if type(ccn)==str:
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ccn = ccn.encode('utf-8')
name = name + b'\x00'
ccn = ccn + b'\x00'
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name_sha = hashlib.sha1(name).digest()[:16]
ccn_sha = hashlib.sha1(ccn).digest()[:16]
both_sha = hashlib.sha1(name + ccn).digest()
aes = AES(ccn_sha, name_sha)
crypt = aes.encrypt(both_sha + (b'\x0c' * 0x0c))
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userkey = hashlib.sha1(crypt).digest()
return base64.b64encode(userkey)
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def cli_main():
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sys.stdout=SafeUnbuffered(sys.stdout)
sys.stderr=SafeUnbuffered(sys.stderr)
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argv=unicode_argv()
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progname = os.path.basename(argv[0])
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if AES is None:
print("%s: This script requires OpenSSL or PyCrypto, which must be installed " \
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"separately. Read the top-of-script comment for details." % \
(progname,))
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return 1
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if len(argv) != 4:
print("usage: {0} <Name> <CC#> <keyfileout.b64>".format(progname))
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return 1
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name, ccn, keypath = argv[1:]
userkey = generate_key(name, ccn)
open(keypath,'wb').write(userkey)
return 0
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def gui_main():
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try:
import Tkinter
import Tkconstants
import tkMessageBox
import tkFileDialog
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import traceback
except:
return cli_main()
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class DecryptionDialog(Tkinter.Frame):
def __init__(self, root):
Tkinter.Frame.__init__(self, root, border=5)
self.status = Tkinter.Label(self, text="Enter parameters")
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self.status.pack(fill=Tkconstants.X, expand=1)
body = Tkinter.Frame(self)
body.pack(fill=Tkconstants.X, expand=1)
sticky = Tkconstants.E + Tkconstants.W
body.grid_columnconfigure(1, weight=2)
Tkinter.Label(body, text="Account Name").grid(row=0)
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self.name = Tkinter.Entry(body, width=40)
self.name.grid(row=0, column=1, sticky=sticky)
Tkinter.Label(body, text="CC#").grid(row=1)
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self.ccn = Tkinter.Entry(body, width=40)
self.ccn.grid(row=1, column=1, sticky=sticky)
Tkinter.Label(body, text="Output file").grid(row=2)
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self.keypath = Tkinter.Entry(body, width=40)
self.keypath.grid(row=2, column=1, sticky=sticky)
self.keypath.insert(2, "bnepubkey.b64")
button = Tkinter.Button(body, text="...", command=self.get_keypath)
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button.grid(row=2, column=2)
buttons = Tkinter.Frame(self)
buttons.pack()
botton = Tkinter.Button(
buttons, text="Generate", width=10, command=self.generate)
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botton.pack(side=Tkconstants.LEFT)
Tkinter.Frame(buttons, width=10).pack(side=Tkconstants.LEFT)
button = Tkinter.Button(
buttons, text="Quit", width=10, command=self.quit)
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button.pack(side=Tkconstants.RIGHT)
def get_keypath(self):
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keypath = tkFileDialog.asksaveasfilename(
parent=None, title="Select B&N ePub key file to produce",
defaultextension=".b64",
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filetypes=[('base64-encoded files', '.b64'),
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('All Files', '.*')])
if keypath:
keypath = os.path.normpath(keypath)
self.keypath.delete(0, Tkconstants.END)
self.keypath.insert(0, keypath)
return
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def generate(self):
name = self.name.get()
ccn = self.ccn.get()
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keypath = self.keypath.get()
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if not name:
self.status['text'] = "Name not specified"
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return
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if not ccn:
self.status['text'] = "Credit card number not specified"
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return
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if not keypath:
self.status['text'] = "Output keyfile path not specified"
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return
self.status['text'] = "Generating..."
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try:
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userkey = generate_key(name, ccn)
except Exception as e:
self.status['text'] = "Error: (0}".format(e.args[0])
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return
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open(keypath,'wb').write(userkey)
self.status['text'] = "Keyfile successfully generated"
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root = Tkinter.Tk()
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if AES is None:
root.withdraw()
tkMessageBox.showerror(
"Ignoble EPUB Keyfile Generator",
"This script requires OpenSSL or PyCrypto, which must be installed "
"separately. Read the top-of-script comment for details.")
return 1
root.title("Barnes & Noble ePub Keyfile Generator v.{0}".format(__version__))
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root.resizable(True, False)
root.minsize(300, 0)
DecryptionDialog(root).pack(fill=Tkconstants.X, expand=1)
root.mainloop()
return 0
if __name__ == '__main__':
if len(sys.argv) > 1:
sys.exit(cli_main())
sys.exit(gui_main())