tools v3.3
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Apprentice Alf
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#! /usr/bin/python
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from __future__ import with_statement
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# ignoblekeygen.pyw, version 2.3
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# To run this program install Python 2.6 from <http://www.python.org/download/>
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# and OpenSSL or PyCrypto from http://www.voidspace.org.uk/python/modules.shtml#pycrypto
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# (make sure to install the version for Python 2.6). Save this script file as
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# ignoblekeygen.pyw and double-click on it to run it.
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# Revision history:
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# 1 - Initial release
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# 2 - Add OS X support by using OpenSSL when available (taken/modified from ineptepub v5)
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# 2.1 - Allow Windows versions of libcrypto to be found
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# 2.2 - On Windows try PyCrypto first and then OpenSSL next
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# 2.3 - Modify interface to allow use of import
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"""
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Generate Barnes & Noble EPUB user key from name and credit card number.
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"""
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__license__ = 'GPL v3'
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import sys
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import os
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import hashlib
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import Tkinter
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import Tkconstants
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import tkFileDialog
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import tkMessageBox
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# use openssl's libcrypt if it exists in place of pycrypto
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# code extracted from the Adobe Adept DRM removal code also by I HeartCabbages
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class IGNOBLEError(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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print 'libcrypto not found'
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raise IGNOBLEError('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_encrypt_key = F(c_int, 'AES_set_encrypt_key',
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[c_char_p, c_int, AES_KEY_p])
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AES_cbc_encrypt = F(None, 'AES_cbc_encrypt',
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[c_char_p, c_char_p, c_ulong, AES_KEY_p, c_char_p,
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c_int])
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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():
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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, iv):
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self._aes = _AES.new(key, _AES.MODE_CBC, iv)
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def encrypt(self, data):
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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)
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if sys.platform.startswith('win'):
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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, IGNOBLEError):
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pass
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return AES
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AES = _load_crypto()
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def normalize_name(name):
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return ''.join(x for x in name.lower() if x != ' ')
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def generate_keyfile(name, ccn, outpath):
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name = normalize_name(name) + '\x00'
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ccn = ccn + '\x00'
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name_sha = hashlib.sha1(name).digest()[:16]
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ccn_sha = hashlib.sha1(ccn).digest()[:16]
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both_sha = hashlib.sha1(name + ccn).digest()
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aes = AES(ccn_sha, name_sha)
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crypt = aes.encrypt(both_sha + ('\x0c' * 0x0c))
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userkey = hashlib.sha1(crypt).digest()
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with open(outpath, 'wb') as f:
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f.write(userkey.encode('base64'))
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return userkey
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class DecryptionDialog(Tkinter.Frame):
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def __init__(self, root):
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Tkinter.Frame.__init__(self, root, border=5)
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self.status = Tkinter.Label(self, text='Enter parameters')
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self.status.pack(fill=Tkconstants.X, expand=1)
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body = Tkinter.Frame(self)
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body.pack(fill=Tkconstants.X, expand=1)
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sticky = Tkconstants.E + Tkconstants.W
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body.grid_columnconfigure(1, weight=2)
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Tkinter.Label(body, text='Name').grid(row=1)
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self.name = Tkinter.Entry(body, width=30)
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self.name.grid(row=1, column=1, sticky=sticky)
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Tkinter.Label(body, text='CC#').grid(row=2)
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self.ccn = Tkinter.Entry(body, width=30)
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self.ccn.grid(row=2, column=1, sticky=sticky)
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Tkinter.Label(body, text='Output file').grid(row=0)
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self.keypath = Tkinter.Entry(body, width=30)
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self.keypath.grid(row=0, column=1, sticky=sticky)
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self.keypath.insert(0, 'bnepubkey.b64')
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button = Tkinter.Button(body, text="...", command=self.get_keypath)
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button.grid(row=0, column=2)
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buttons = Tkinter.Frame(self)
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buttons.pack()
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botton = Tkinter.Button(
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buttons, text="Generate", width=10, command=self.generate)
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botton.pack(side=Tkconstants.LEFT)
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Tkinter.Frame(buttons, width=10).pack(side=Tkconstants.LEFT)
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button = Tkinter.Button(
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buttons, text="Quit", width=10, command=self.quit)
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button.pack(side=Tkconstants.RIGHT)
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def get_keypath(self):
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keypath = tkFileDialog.asksaveasfilename(
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parent=None, title='Select B&N EPUB key file to produce',
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defaultextension='.b64',
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filetypes=[('base64-encoded files', '.b64'),
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('All Files', '.*')])
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if keypath:
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keypath = os.path.normpath(keypath)
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self.keypath.delete(0, Tkconstants.END)
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self.keypath.insert(0, keypath)
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return
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def generate(self):
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name = self.name.get()
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ccn = self.ccn.get()
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keypath = self.keypath.get()
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if not name:
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self.status['text'] = 'Name not specified'
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return
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if not ccn:
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self.status['text'] = 'Credit card number not specified'
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return
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if not keypath:
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self.status['text'] = 'Output keyfile path not specified'
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return
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self.status['text'] = 'Generating...'
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try:
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generate_keyfile(name, ccn, keypath)
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except Exception, e:
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self.status['text'] = 'Error: ' + str(e)
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return
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self.status['text'] = 'Keyfile successfully generated'
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def cli_main(argv=sys.argv):
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progname = os.path.basename(argv[0])
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if AES is None:
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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." % \
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(progname,)
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return 1
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if len(argv) != 4:
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print "usage: %s NAME CC# OUTFILE" % (progname,)
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return 1
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name, ccn, outpath = argv[1:]
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generate_keyfile(name, ccn, outpath)
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return 0
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def gui_main():
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root = Tkinter.Tk()
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if AES is None:
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root.withdraw()
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tkMessageBox.showerror(
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"Ignoble EPUB Keyfile Generator",
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"This script requires OpenSSL or PyCrypto, which must be installed "
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"separately. Read the top-of-script comment for details.")
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return 1
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root.title('Ignoble EPUB Keyfile Generator')
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root.resizable(True, False)
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root.minsize(300, 0)
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DecryptionDialog(root).pack(fill=Tkconstants.X, expand=1)
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root.mainloop()
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return 0
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if __name__ == '__main__':
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if len(sys.argv) > 1:
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sys.exit(cli_main())
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sys.exit(gui_main())
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