DeDRM_tools/Barnes_and_Noble_EPUB_Tools/ignoblekeygen.pyw

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#! /usr/bin/python
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# ignoblekeygen.pyw, version 2
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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
# ignoblekeygen.pyw and double-click on it to run it.
# Revision history:
# 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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"""
Generate Barnes & Noble EPUB user key from name and credit card number.
"""
from __future__ import with_statement
__license__ = 'GPL v3'
import sys
import os
import hashlib
import Tkinter
import Tkconstants
import tkFileDialog
import tkMessageBox
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# use openssl's libcrypt if it exists in place of pycrypto
# code extracted from the Adobe Adept DRM removal code also by I HeartCabbages
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
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if sys.platform.startswith('win'):
libcrypto = find_library('libeay32')
else:
libcrypto = find_library('crypto')
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if libcrypto is None:
print 'libcrypto not found'
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_encrypt_key = F(c_int, 'AES_set_encrypt_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, iv):
self._blocksize = len(userkey)
self._iv = iv
key = self._key = AES_KEY()
rv = AES_set_encrypt_key(userkey, len(userkey) * 8, key)
if rv < 0:
raise IGNOBLEError('Failed to initialize AES Encrypt key')
def encrypt(self, data):
out = create_string_buffer(len(data))
rv = AES_cbc_encrypt(data, out, len(data), self._key, self._iv, 1)
if rv == 0:
raise IGNOBLEError('AES encryption failed')
return out.raw
return AES
def _load_crypto_pycrypto():
from Crypto.Cipher import AES as _AES
class AES(object):
def __init__(self, key, iv):
self._aes = _AES.new(key, _AES.MODE_CBC, iv)
def encrypt(self, data):
return self._aes.encrypt(data)
return AES
def _load_crypto():
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AES = None
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for loader in (_load_crypto_libcrypto, _load_crypto_pycrypto):
try:
AES = loader()
break
except (ImportError, IGNOBLEError):
pass
return AES
AES = _load_crypto()
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def normalize_name(name):
return ''.join(x for x in name.lower() if x != ' ')
def generate_keyfile(name, ccn, outpath):
name = normalize_name(name) + '\x00'
ccn = ccn + '\x00'
name_sha = hashlib.sha1(name).digest()[:16]
ccn_sha = hashlib.sha1(ccn).digest()[:16]
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))
userkey = hashlib.sha1(crypt).digest()
with open(outpath, 'wb') as f:
f.write(userkey.encode('base64'))
return userkey
def cli_main(argv=sys.argv):
progname = os.path.basename(argv[0])
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." % \
(progname,)
return 1
if len(argv) != 4:
print "usage: %s NAME CC# OUTFILE" % (progname,)
return 1
name, ccn, outpath = argv[1:]
generate_keyfile(name, ccn, outpath)
return 0
class DecryptionDialog(Tkinter.Frame):
def __init__(self, root):
Tkinter.Frame.__init__(self, root, border=5)
self.status = Tkinter.Label(self, text='Enter parameters')
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='Name').grid(row=1)
self.name = Tkinter.Entry(body, width=30)
self.name.grid(row=1, column=1, sticky=sticky)
Tkinter.Label(body, text='CC#').grid(row=2)
self.ccn = Tkinter.Entry(body, width=30)
self.ccn.grid(row=2, column=1, sticky=sticky)
Tkinter.Label(body, text='Output file').grid(row=0)
self.keypath = Tkinter.Entry(body, width=30)
self.keypath.grid(row=0, column=1, sticky=sticky)
self.keypath.insert(0, 'bnepubkey.b64')
button = Tkinter.Button(body, text="...", command=self.get_keypath)
button.grid(row=0, column=2)
buttons = Tkinter.Frame(self)
buttons.pack()
botton = Tkinter.Button(
buttons, text="Generate", width=10, command=self.generate)
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)
button.pack(side=Tkconstants.RIGHT)
def get_keypath(self):
keypath = tkFileDialog.asksaveasfilename(
parent=None, title='Select B&N EPUB key file to produce',
defaultextension='.b64',
filetypes=[('base64-encoded files', '.b64'),
('All Files', '.*')])
if keypath:
keypath = os.path.normpath(keypath)
self.keypath.delete(0, Tkconstants.END)
self.keypath.insert(0, keypath)
return
def generate(self):
name = self.name.get()
ccn = self.ccn.get()
keypath = self.keypath.get()
if not name:
self.status['text'] = 'Name not specified'
return
if not ccn:
self.status['text'] = 'Credit card number not specified'
return
if not keypath:
self.status['text'] = 'Output keyfile path not specified'
return
self.status['text'] = 'Generating...'
try:
generate_keyfile(name, ccn, keypath)
except Exception, e:
self.status['text'] = 'Error: ' + str(e)
return
self.status['text'] = 'Keyfile successfully generated'
def gui_main():
root = Tkinter.Tk()
if AES is None:
root.withdraw()
tkMessageBox.showerror(
"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.")
return 1
root.title('Ignoble EPUB Keyfile Generator')
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())