#! /usr/bin/python from __future__ import with_statement # ignoblekeygen.pyw, version 2.3 # To run this program install Python 2.6 from # and OpenSSL or PyCrypto from http://www.voidspace.org.uk/python/modules.shtml#pycrypto # (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 # 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 """ Generate Barnes & Noble EPUB user key from name and credit card number. """ __license__ = 'GPL v3' import sys import os import hashlib import Tkinter import Tkconstants import tkFileDialog import tkMessageBox # 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 if sys.platform.startswith('win'): libcrypto = find_library('libeay32') else: libcrypto = find_library('crypto') 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(): 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() 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() aes = AES(ccn_sha, name_sha) 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 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 cli_main(argv=sys.argv): progname = os.path.basename(argv[0]) if AES is None: print "%s: This script requires OpenSSL or PyCrypto, which must be installed " \ "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 def gui_main(): root = Tkinter.Tk() 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('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())