DeDRM_tools/Barnes_and_Noble_EPUB_Tools/ignoblekey.pyw

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2009-12-22 17:54:19 +07:00
#! /usr/bin/python
# ignoblekey.pyw, version 2
# To run this program install Python 2.6 from <http://www.python.org/download/>
# Save this script file as ignoblekey.pyw and double-click on it to run it.
# Revision history:
# 1 - Initial release
# 2 - Add some missing code
"""
Retrieve B&N DesktopReader EPUB user AES key.
"""
from __future__ import with_statement
__license__ = 'GPL v3'
import sys
import os
import binascii
import glob
import Tkinter
import Tkconstants
import tkMessageBox
import traceback
BN_KEY_KEY = 'uhk00000000'
BN_APPDATA_DIR = r'Barnes & Noble\DesktopReader'
class IgnobleError(Exception):
pass
def retrieve_key(inpath, outpath):
# The B&N DesktopReader 'ClientAPI' file is just a sqlite3 DB. Requiring
# users to install sqlite3 and bindings seems like overkill for retrieving
# one value, so we go in hot and dirty.
with open(inpath, 'rb') as f:
data = f.read()
if BN_KEY_KEY not in data:
raise IgnobleError('B&N user key not found; unexpected DB format?')
index = data.rindex(BN_KEY_KEY) + len(BN_KEY_KEY) + 1
data = data[index:index + 40]
for i in xrange(20, len(data)):
try:
keyb64 = data[:i]
if len(keyb64.decode('base64')) == 20:
break
except binascii.Error:
pass
else:
raise IgnobleError('Problem decoding key; unexpected DB format?')
with open(outpath, 'wb') as f:
f.write(keyb64 + '\n')
def cli_main(argv=sys.argv):
progname = os.path.basename(argv[0])
args = argv[1:]
if len(args) != 2:
sys.stderr.write("USAGE: %s CLIENTDB KEYFILE" % (progname,))
return 1
inpath, outpath = args
retrieve_key(inpath, outpath)
return 0
def find_bnclientdb_path():
appdata = os.environ['APPDATA']
bndir = os.path.join(appdata, BN_APPDATA_DIR)
if not os.path.isdir(bndir):
raise IgnobleError('Could not locate B&N Reader installation')
dbpath = glob.glob(os.path.join(bndir, 'ClientAPI_*.db'))
if len(dbpath) == 0:
raise IgnobleError('Problem locating B&N Reader DB')
return sorted(dbpath)[-1]
class ExceptionDialog(Tkinter.Frame):
def __init__(self, root, text):
Tkinter.Frame.__init__(self, root, border=5)
label = Tkinter.Label(self, text="Unexpected error:",
anchor=Tkconstants.W, justify=Tkconstants.LEFT)
label.pack(fill=Tkconstants.X, expand=0)
self.text = Tkinter.Text(self)
self.text.pack(fill=Tkconstants.BOTH, expand=1)
self.text.insert(Tkconstants.END, text)
def gui_main(argv=sys.argv):
root = Tkinter.Tk()
root.withdraw()
progname = os.path.basename(argv[0])
keypath = 'bnepubkey.b64'
try:
dbpath = find_bnclientdb_path()
retrieve_key(dbpath, keypath)
except IgnobleError, e:
tkMessageBox.showerror("Ignoble Key", "Error: " + str(e))
return 1
except Exception:
root.wm_state('normal')
root.title('Ignoble Key')
text = traceback.format_exc()
ExceptionDialog(root, text).pack(fill=Tkconstants.BOTH, expand=1)
root.mainloop()
return 1
tkMessageBox.showinfo(
"Ignoble Key", "Key successfully retrieved to %s" % (keypath))
return 0
if __name__ == '__main__':
if len(sys.argv) > 1:
sys.exit(cli_main())
sys.exit(gui_main())