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Added in fetching B&N key via URL instead of generating from name & CC#

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Apprentice Harper 2015-04-10 18:12:39 +01:00 committed by Apprentice Alf
parent d140b7e2dc
commit 45ad3cedec
3 changed files with 263 additions and 35 deletions
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30
DeDRM_calibre_plugin/DeDRM_plugin/DeDRM_Barnes and Noble Key_Help.htm
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@ -1,4 +1,4 @@
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
@ -24,28 +24,17 @@ li {margin-top: 0.5em}
<h3>Changes at Barnes & Noble</h3>
<p>In mid-2014, Barnes & Noble changed the way they generated encryption keys. Instead of deriving the key from the user's name and credit card number, they started generating a random key themselves, sending that key through to devices when they connected to the Barnes & Noble servers. This means that some users will find that no combination of their name and CC# will work in decrypting their ebooks.</p>
<p>In mid-2014, Barnes & Noble changed the way they generated encryption keys. Instead of deriving the key from the user's name and credit card number, they started generating a random key themselves, sending that key through to devices when they connected to the Barnes & Noble servers. This means that most users will now find that no combination of their name and CC# will work in decrypting their recently downloaded ebooks.</p>
<p>There is a work-around. Barnes & Noble’s desktop app NOOK Study generates a log file that contains the encryption key. You can download NOOK Study from <a href="https://yuzu.com/nsdownload">https://yuzu.com/nsdownload</a>.</p>
<p>Once downloaded, install the application, register with your Barnes & Noble or nook account, and download at least one DRMed ebook through NOOK Study. It will be saved somewhere in a folder called "My Barnes & Noble eBooks" in your Documents folder.</p>
<p>Now import that book into calibre. The log file and the key in the log should be automatically found by the plugin and used to decrypt the book.</p>
<p>If the automatic process doesn't work for you, you can still find extract it manually and save it as a .b64 file for import into the plugin's preferences as follows:</p>
<ol><li>In NOOK Study, select Settings/About (Windows) or NOOK Study/About NOOK Study (Mac) and in the dialog that appears click the link at the bottom to copy the log into the clipboard.</li>
<li>Paste the copied log into a text editor</li>
<li>Search for the text CCHashResponseV1</li>
<li>On the line below which starts with ccHash, copy the text between the " marks after ccHash, but don't include the " marks.</li>
<li>Save that text in a new <b>plain text</b> file, with file name extension .b64 (for example, key.b64)</li>
<li>Import that file into the preferences through this dialog, using the "Import Existing Key Files" button.</li>
</ol>
<p>Someone commenting at Apprentice Alf's blog detailed a way to retrieve a new account key using the account's email address and password. This method has now been incorporated into the plugin.
<h3>Old instructions: Creating New Keys:</h3>
<h3>Creating New Keys:</h3>
<p>On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a green plus sign (+). Clicking this button will open a new dialog for entering the necessary data to generate a new key.</p>
<ul>
<li><span class="bold">Unique Key Name:</span> this is a unique name you choose to help you identify the key. This name will show in the list of configured keys. Choose something that will help you remember the data (name, cc#) it was created with.</li>
<li><span class="bold">Your Name:</span> This is the name used by Barnes and Noble to generate your encryption key. Seemingly at random, Barnes and Noble choose one of three places from which to take this name. Most commonly, it’s your name as set in your Barnes &amp; Noble account, My Account page, directly under PERSONAL INFORMATION. Sometimes it is the the name used in the default shipping address, and sometimes it’s the name listed for the active credit card. If these names are different in your Barnes and Noble account preferences, I suggest creating one key for each version of your name. This name will not be stored anywhere on your computer or in calibre. It will only be used in the creation of the one-way hash/key that’s stored in the preferences.</li>
<li><span class="bold">Credit Card#:</span> this is the default credit card number that was on file with Barnes and Noble at the time of download of the ebook to be de-DRMed. Just enter the 16 (15 for American Express) digits. As with the name, this number will not be stored anywhere on your computer or in calibre. It will only be used in the creation of the one-way hash/key that’s stored in the preferences.</li>
<li><span class="bold">Unique Key Name:</span> this is a unique name you choose to help you identify the key. This name will show in the list of configured keys. Choose something that will help you remember the data (account email address) it was created with.</li>
<li><span class="bold">B&N/nook account email address:</span> This is the default email address for your Barnes and Noble/nook account. This email will not be stored anywhere on your computer or in calibre. It will only be used to fetch the account key that from the B&N server, and it is that key that will be stored in the preferences.</li>
<li><span class="bold">B&N/nook account password:</span> this is the password for your Barnes and Noble/nook account. As with the email address, this will not be stored anywhere on your computer or in calibre. It will only be used to fetch the key from the B&N server.</li>
</ul>
<p>Click the OK button to create and store the generated key. Or Cancel if you don’t want to create a key.</p>
@ -69,6 +58,11 @@ li {margin-top: 0.5em}
<p>Once done creating/deleting/renaming/importing decryption keys, click Close to exit the customization dialogue. Your changes wil only be saved permanently when you click OK in the main configuration dialog.</p>
<h3>NOOK Study</h3>
<p>Books downloaded through NOOK Study may or may not use the key fetched using the above method. If a books is not decrypted successfully with any of the keys, the plugin will attempt to recover a key from the NOOK Study log file and use that.</p>
</body>
</html>

30
DeDRM_calibre_plugin/DeDRM_plugin/config.py
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@ -546,14 +546,14 @@ class AddBandNKeyDialog(QDialog):
name_group = QHBoxLayout()
data_group_box_layout.addLayout(name_group)
name_group.addWidget(QLabel(u"Your Name:", self))
name_group.addWidget(QLabel(u"B&N/nook account email address:", self))
self.name_ledit = QLineEdit(u"", self)
self.name_ledit.setToolTip(_(u"<p>Enter your name as it appears in your B&N " +
u"account or on your credit card.</p>" +
self.name_ledit.setToolTip(_(u"<p>Enter your email address as it appears in your B&N " +
u"account.</p>" +
u"<p>It will only be used to generate this " +
u"one-time key and won\'t be stored anywhere " +
u"key and won\'t be stored anywhere " +
u"in calibre or on your computer.</p>" +
u"<p>(ex: Jonathan Smith)"))
u"<p>eg: apprenticeharper@gmail.com</p>"))
name_group.addWidget(self.name_ledit)
name_disclaimer_label = QLabel(_(u"(Will not be saved in configuration data)"), self)
name_disclaimer_label.setAlignment(Qt.AlignHCenter)
@ -561,13 +561,12 @@ class AddBandNKeyDialog(QDialog):
ccn_group = QHBoxLayout()
data_group_box_layout.addLayout(ccn_group)
ccn_group.addWidget(QLabel(u"Credit Card#:", self))
ccn_group.addWidget(QLabel(u"B&N/nook account password:", self))
self.cc_ledit = QLineEdit(u"", self)
self.cc_ledit.setToolTip(_(u"<p>Enter the full credit card number on record " +
u"in your B&N account.</p>" +
u"<p>No spaces or dashes... just the numbers. " +
u"This number will only be used to generate this " +
u"one-time key and won\'t be stored anywhere in " +
self.cc_ledit.setToolTip(_(u"<p>Enter the password " +
u"for your B&N account.</p>" +
u"<p>The password will only be used to generate this " +
u"key and won\'t be stored anywhere in " +
u"calibre or on your computer."))
ccn_group.addWidget(self.cc_ledit)
ccn_disclaimer_label = QLabel(_('(Will not be saved in configuration data)'), self)
@ -588,8 +587,8 @@ class AddBandNKeyDialog(QDialog):
@property
def key_value(self):
from calibre_plugins.dedrm.ignoblekeygen import generate_key as generate_bandn_key
return generate_bandn_key(self.user_name,self.cc_number)
from calibre_plugins.dedrm.ignoblekeyfetch import fetch_key as fetch_bandn_key
return fetch_bandn_key(self.user_name,self.cc_number)
@property
def user_name(self):
@ -597,16 +596,13 @@ class AddBandNKeyDialog(QDialog):
@property
def cc_number(self):
return unicode(self.cc_ledit.text()).strip().replace(' ', '').replace('-','')
return unicode(self.cc_ledit.text()).strip()
def accept(self):
if len(self.key_name) == 0 or len(self.user_name) == 0 or len(self.cc_number) == 0 or self.key_name.isspace() or self.user_name.isspace() or self.cc_number.isspace():
errmsg = u"All fields are required!"
return error_dialog(None, "{0} {1}".format(PLUGIN_NAME, PLUGIN_VERSION), errmsg, show=True, show_copy_button=False)
if not self.cc_number.isdigit():
errmsg = u"Numbers only in the credit card number field!"
return error_dialog(None, "{0} {1}".format(PLUGIN_NAME, PLUGIN_VERSION), errmsg, show=True, show_copy_button=False)
if len(self.key_name) < 4:
errmsg = u"Key name must be at <i>least</i> 4 characters long!"
return error_dialog(None, "{0} {1}".format(PLUGIN_NAME, PLUGIN_VERSION), errmsg, show=True, show_copy_button=False)

238
DeDRM_calibre_plugin/DeDRM_plugin/ignoblekeyfetch.py Normal file
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@ -0,0 +1,238 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import with_statement
# ignoblekeyfetch.pyw, version 1.0
# Copyright © 2015 Apprentice Harper
# Released under the terms of the GNU General Public Licence, version 3
# <http://www.gnu.org/licenses/>
# Based on discoveries by "Nobody You Know"
# 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.
#
# 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
# it when it has been associated with PythonLauncher.
# Revision history:
# 1.0 - Initial release
"""
Fetch Barnes & Noble EPUB user key from B&N servers using email and password
"""
__license__ = 'GPL v3'
__version__ = "1.0"
import sys
import os
# 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,unicode):
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')
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
# characters with '?'. So use shell32.GetCommandLineArgvW to get sys.argv
# as a list of Unicode strings and encode them as utf-8
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
xrange(start, argc.value)]
# if we don't have any arguments at all, just pass back script name
# this should never happen
return [u"ignoblekeygen.py"]
else:
argvencoding = sys.stdin.encoding
if argvencoding == None:
argvencoding = "utf-8"
return [arg if (type(arg) == unicode) else unicode(arg,argvencoding) for arg in sys.argv]
class IGNOBLEError(Exception):
pass
def fetch_key(email, password):
# remove spaces and case from name and CC numbers.
if type(email)==unicode:
email = email.encode('utf-8')
if type(password)==unicode:
password = password.encode('utf-8')
import random
random = "%030x" % random.randrange(16**30)
import urllib, urllib2
fetch_url = "https://cart4.barnesandnoble.com/services/service.aspx?Version=2&acctPassword="
fetch_url += urllib.quote(password,'')+"&devID=PC_BN_2.5.6.9575_"+random+"&emailAddress="
fetch_url += urllib.quote(email,"")+"&outFormat=5&schema=1&service=1&stage=deviceHashB"
#print fetch_url
found = ''
try:
req = urllib2.Request(fetch_url)
response = urllib2.urlopen(req)
the_page = response.read()
import re
found = re.search('ccHash>(.+?)</ccHash', the_page).group(1)
except:
found = ''
return found
def cli_main():
sys.stdout=SafeUnbuffered(sys.stdout)
sys.stderr=SafeUnbuffered(sys.stderr)
argv=unicode_argv()
progname = os.path.basename(argv[0])
if len(argv) != 4:
print u"usage: {0} <email> <password> <keyfileout.b64>".format(progname)
return 1
email, password, keypath = argv[1:]
userkey = fetch_key(email, password)
if len(userkey) == 28:
open(keypath,'wb').write(userkey)
return 0
print u"Failed to fetch key."
return 1
def gui_main():
try:
import Tkinter
import Tkconstants
import tkMessageBox
import traceback
except:
return cli_main()
class DecryptionDialog(Tkinter.Frame):
def __init__(self, root):
Tkinter.Frame.__init__(self, root, border=5)
self.status = Tkinter.Label(self, text=u"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=u"Account email address").grid(row=0)
self.name = Tkinter.Entry(body, width=40)
self.name.grid(row=0, column=1, sticky=sticky)
Tkinter.Label(body, text=u"Account password").grid(row=1)
self.ccn = Tkinter.Entry(body, width=40)
self.ccn.grid(row=1, column=1, sticky=sticky)
Tkinter.Label(body, text=u"Output file").grid(row=2)
self.keypath = Tkinter.Entry(body, width=40)
self.keypath.grid(row=2, column=1, sticky=sticky)
self.keypath.insert(2, u"bnepubkey.b64")
button = Tkinter.Button(body, text=u"...", command=self.get_keypath)
button.grid(row=2, column=2)
buttons = Tkinter.Frame(self)
buttons.pack()
botton = Tkinter.Button(
buttons, text=u"Fetch", width=10, command=self.generate)
botton.pack(side=Tkconstants.LEFT)
Tkinter.Frame(buttons, width=10).pack(side=Tkconstants.LEFT)
button = Tkinter.Button(
buttons, text=u"Quit", width=10, command=self.quit)
button.pack(side=Tkconstants.RIGHT)
def get_keypath(self):
keypath = tkFileDialog.asksaveasfilename(
parent=None, title=u"Select B&N ePub key file to produce",
defaultextension=u".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):
email = self.name.get()
password = self.ccn.get()
keypath = self.keypath.get()
if not email:
self.status['text'] = u"Email address not given"
return
if not password:
self.status['text'] = u"Account password not given"
return
if not keypath:
self.status['text'] = u"Output keyfile path not set"
return
self.status['text'] = u"Fetching..."
try:
userkey = fetch_key(email, password)
except Exception, e:
self.status['text'] = u"Error: {0}".format(e.args[0])
return
open(keypath,'wb').write(userkey)
self.status['text'] = u"Keyfile successfully generated"
root = Tkinter.Tk()
root.title(u"Barnes & Noble ePub Keyfile Fetch v.{0}".format(__version__))
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())