tools v5.4
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Apprentice Alf
260
Calibre_Plugins/ignobleepub_plugin/utilities.py
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260
Calibre_Plugins/ignobleepub_plugin/utilities.py
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#!/usr/bin/env python
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from __future__ import with_statement
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__license__ = 'GPL v3'
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import hashlib
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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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from PyQt4.Qt import (Qt, QHBoxLayout, QVBoxLayout, QLabel, QLineEdit,
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QGroupBox, QDialog, QDialogButtonBox)
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from calibre.gui2 import error_dialog
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from calibre.constants import iswindows
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from calibre_plugins.ignoble_epub.__init__ import PLUGIN_NAME, PLUGIN_VERSION
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DETAILED_MESSAGE = \
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'You have personal information stored in this plugin\'s customization '+ \
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'string from a previous version of this plugin.\n\n'+ \
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'This new version of the plugin can convert that info '+ \
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'into key data that the new plugin can then use (which doesn\'t '+ \
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'require personal information to be stored/displayed in an insecure '+ \
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'manner like the old plugin did).\n\nIf you choose NOT to migrate this data at this time '+ \
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'you will be prompted to save that personal data to a file elsewhere; and you\'ll have '+ \
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'to manually re-configure this plugin with your information.\n\nEither way... ' + \
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'this new version of the plugin will not be responsible for storing that personal '+ \
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'info in plain sight any longer.'
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class IGNOBLEError(Exception):
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pass
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def normalize_name(name): # Strip spaces and convert to lowercase.
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return ''.join(x for x in name.lower() if x != ' ')
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# These are the key ENCRYPTING aes crypto functions
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def generate_keyfile(name, ccn):
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# Load the necessary crypto libs.
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AES = _load_crypto()
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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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return userkey.encode('base64')
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def _load_crypto_libcrypto():
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if iswindows:
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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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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 iswindows:
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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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def caselessStrCmp(s1, s2):
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"""
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A function to case-insensitively compare strings. Python's .lower() function
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isn't always very accurate when it comes to unicode. Using the standard C lib's
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strcasecmp instead. Maybe a tad slower, but we're not scouring scads of string lists here.
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"""
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str1 = unicode(s1)
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str2 = unicode(s2)
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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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if iswindows:
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libc = find_library('msvcrt')
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else:
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libc = find_library('c')
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if libc is None:
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raise IgnobleError('libc not found')
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libc = CDLL(libc)
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def F(restype, name, argtypes):
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func = getattr(libc, 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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if iswindows:
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_stricmp = F(c_int, '_stricmp', [c_char_p, c_char_p])
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return _stricmp(str1, str2)
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strcasecmp = F(c_int, 'strcasecmp', [c_char_p, c_char_p])
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return strcasecmp(str1, str2)
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class AddKeyDialog(QDialog):
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def __init__(self, parent=None,):
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QDialog.__init__(self, parent)
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self.parent = parent
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self.setWindowTitle('Create New Ignoble Key')
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layout = QVBoxLayout(self)
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self.setLayout(layout)
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data_group_box = QGroupBox('', self)
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layout.addWidget(data_group_box)
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data_group_box_layout = QVBoxLayout()
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data_group_box.setLayout(data_group_box_layout)
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key_group = QHBoxLayout()
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data_group_box_layout.addLayout(key_group)
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key_group.addWidget(QLabel('Unique Key Name:', self))
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self.key_ledit = QLineEdit('', self)
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self.key_ledit.setToolTip(_('<p>Enter an identifying name for this new Ignoble key.</p>' +
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'<p>It should be something that will help you remember ' +
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'what personal information was used to create it.'))
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key_group.addWidget(self.key_ledit)
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key_label = QLabel(_(''), self)
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key_label.setAlignment(Qt.AlignHCenter)
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data_group_box_layout.addWidget(key_label)
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name_group = QHBoxLayout()
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data_group_box_layout.addLayout(name_group)
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name_group.addWidget(QLabel('Your Name:', self))
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self.name_ledit = QLineEdit('', self)
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self.name_ledit.setToolTip(_('<p>Enter your name as it appears in your B&N ' +
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'account and/or on your credit card.</p>' +
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'<p>It will only be used to generate this ' +
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'one-time key and won\'t be stored anywhere ' +
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'in calibre or on your computer.</p>' +
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'<p>(ex: Jonathan Smith)'))
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name_group.addWidget(self.name_ledit)
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name_disclaimer_label = QLabel(_('Will not be stored/saved in configuration data:'), self)
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name_disclaimer_label.setAlignment(Qt.AlignHCenter)
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data_group_box_layout.addWidget(name_disclaimer_label)
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ccn_group = QHBoxLayout()
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data_group_box_layout.addLayout(ccn_group)
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ccn_group.addWidget(QLabel('Credit Card#:', self))
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self.cc_ledit = QLineEdit('', self)
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self.cc_ledit.setToolTip(_('<p>Enter the full credit card number on record ' +
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'in your B&N account.</p>' +
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'<p>No spaces or dashes... just the numbers. ' +
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'This CC# will only be used to generate this ' +
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'one-time key and won\'t be stored anywhere in ' +
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'calibre or on your computer.'))
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ccn_group.addWidget(self.cc_ledit)
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ccn_disclaimer_label = QLabel(_('Will not be stored/saved in configuration data:'), self)
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ccn_disclaimer_label.setAlignment(Qt.AlignHCenter)
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data_group_box_layout.addWidget(ccn_disclaimer_label)
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layout.addSpacing(20)
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self.button_box = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)
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self.button_box.accepted.connect(self.accept)
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self.button_box.rejected.connect(self.reject)
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layout.addWidget(self.button_box)
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self.resize(self.parent.sizeHint())
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def accept(self):
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match = False
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if (self.key_ledit.text().isEmpty() or self.name_ledit.text().isEmpty()
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or self.cc_ledit.text().isEmpty()):
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errmsg = '<p>All fields are required!'
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return error_dialog(None, PLUGIN_NAME + 'error_dialog',
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_(errmsg), show=True, show_copy_button=False)
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for k in self.parent.plugin_keys.keys():
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if caselessStrCmp(self.key_ledit.text(), k) == 0:
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match = True
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break
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if match:
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errmsg = '<p>The key name <strong>%s</strong> is already being used.' % self.key_ledit.text()
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return error_dialog(None, PLUGIN_NAME + 'error_dialog',
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_(errmsg), show=True, show_copy_button=False)
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else:
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QDialog.accept(self)
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@property
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def user_name(self):
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return unicode(self.name_ledit.text()).strip().lower().replace(' ', '')
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@property
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def cc_number(self):
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return unicode(self.cc_ledit.text()).strip().replace(' ', '').replace('-','')
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@property
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def key_name(self):
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return unicode(self.key_ledit.text())
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def parseCustString(keystuff):
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userkeys = []
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ar = keystuff.split(':')
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for i in ar:
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try:
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name, ccn = i.split(',')
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except:
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return False
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# Generate Barnes & Noble EPUB user key from name and credit card number.
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userkeys.append(generate_keyfile(name, ccn))
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return userkeys
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