mirror of
https://github.com/noDRM/DeDRM_tools.git
synced 2024-11-16 19:06:09 +06:00
504 lines
21 KiB
Python
Executable File
504 lines
21 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# erdr2pml.py
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# Copyright © 2008-2022 The Dark Reverser, Apprentice Harper, noDRM et al.
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#
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# Changelog
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#
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# Based on ereader2html version 0.08 plus some later small fixes
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#
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# 0.01 - Initial version
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# 0.02 - Support more eReader files. Support bold text and links. Fix PML decoder parsing bug.
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# 0.03 - Fix incorrect variable usage at one place.
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# 0.03b - enhancement by DeBockle (version 259 support)
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# Custom version 0.03 - no change to eReader support, only usability changes
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# - start of pep-8 indentation (spaces not tab), fix trailing blanks
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# - version variable, only one place to change
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# - added main routine, now callable as a library/module,
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# means tools can add optional support for ereader2html
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# - outdir is no longer a mandatory parameter (defaults based on input name if missing)
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# - time taken output to stdout
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# - Psyco support - reduces runtime by a factor of (over) 3!
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# E.g. (~600Kb file) 90 secs down to 24 secs
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# - newstyle classes
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# - changed map call to list comprehension
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# may not work with python 2.3
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# without Psyco this reduces runtime to 90%
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# E.g. 90 secs down to 77 secs
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# Psyco with map calls takes longer, do not run with map in Psyco JIT!
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# - izip calls used instead of zip (if available), further reduction
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# in run time (factor of 4.5).
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# E.g. (~600Kb file) 90 secs down to 20 secs
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# - Python 2.6+ support, avoid DeprecationWarning with sha/sha1
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# 0.04 - Footnote support, PML output, correct charset in html, support more PML tags
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# - Feature change, dump out PML file
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# - Added supprt for footnote tags. NOTE footnote ids appear to be bad (not usable)
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# in some pdb files :-( due to the same id being used multiple times
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# - Added correct charset encoding (pml is based on cp1252)
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# - Added logging support.
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# 0.05 - Improved type 272 support for sidebars, links, chapters, metainfo, etc
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# 0.06 - Merge of 0.04 and 0.05. Improved HTML output
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# Placed images in subfolder, so that it's possible to just
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# drop the book.pml file onto DropBook to make an unencrypted
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# copy of the eReader file.
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# Using that with Calibre works a lot better than the HTML
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# conversion in this code.
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# 0.07 - Further Improved type 272 support for sidebars with all earlier fixes
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# 0.08 - fixed typos, removed extraneous things
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# 0.09 - fixed typos in first_pages to first_page to again support older formats
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# 0.10 - minor cleanups
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# 0.11 - fixups for using correct xml for footnotes and sidebars for use with Dropbook
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# 0.12 - Fix added to prevent lowercasing of image names when the pml code itself uses a different case in the link name.
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# 0.13 - change to unbuffered stdout for use with gui front ends
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# 0.14 - contributed enhancement to support --make-pmlz switch
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# 0.15 - enabled high-ascii to pml character encoding. DropBook now works on Mac.
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# 0.16 - convert to use openssl DES (very very fast) or pure python DES if openssl's libcrypto is not available
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# 0.17 - added support for pycrypto's DES as well
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# 0.18 - on Windows try PyCrypto first and OpenSSL next
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# 0.19 - Modify the interface to allow use of import
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# 0.20 - modify to allow use inside new interface for calibre plugins
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# 0.21 - Support eReader (drm) version 11.
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# - Don't reject dictionary format.
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# - Ignore sidebars for dictionaries (different format?)
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# 0.22 - Unicode and plugin support, different image folders for PMLZ and source
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# 0.23 - moved unicode_argv call inside main for Windows DeDRM compatibility
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# 1.00 - Added Python 3 compatibility for calibre 5.0
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# 1.01 - Bugfixes for standalone version.
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# 1.02 - Remove OpenSSL support; only use PyCryptodome
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__version__='1.02'
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import sys, re
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import struct, binascii, getopt, zlib, os, os.path, urllib, tempfile, traceback, hashlib
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try:
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from Cryptodome.Cipher import DES
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except ImportError:
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from Crypto.Cipher import DES
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#@@CALIBRE_COMPAT_CODE@@
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try:
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from utilities import SafeUnbuffered
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from argv_utils import unicode_argv
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except:
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from . import utilities, argv_utils
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iswindows = sys.platform.startswith('win')
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isosx = sys.platform.startswith('darwin')
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import cgi
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import logging
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logging.basicConfig()
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#logging.basicConfig(level=logging.DEBUG)
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class Sectionizer(object):
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bkType = "Book"
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def __init__(self, filename, ident):
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self.contents = open(filename, 'rb').read()
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self.header = self.contents[0:72]
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self.num_sections, = struct.unpack('>H', self.contents[76:78])
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# Dictionary or normal content (TODO: Not hard-coded)
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if self.header[0x3C:0x3C+8] != ident:
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if self.header[0x3C:0x3C+8] == b"PDctPPrs":
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self.bkType = "Dict"
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else:
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raise ValueError('Invalid file format')
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self.sections = []
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for i in range(self.num_sections):
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offset, a1,a2,a3,a4 = struct.unpack('>LBBBB', self.contents[78+i*8:78+i*8+8])
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flags, val = a1, a2<<16|a3<<8|a4
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self.sections.append( (offset, flags, val) )
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def loadSection(self, section):
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if section + 1 == self.num_sections:
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end_off = len(self.contents)
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else:
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end_off = self.sections[section + 1][0]
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off = self.sections[section][0]
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return self.contents[off:end_off]
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# cleanup unicode filenames
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# borrowed from calibre from calibre/src/calibre/__init__.py
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# added in removal of control (<32) chars
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# and removal of . at start and end
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# and with some (heavily edited) code from Paul Durrant's kindlenamer.py
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def sanitizeFileName(name):
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# substitute filename unfriendly characters
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name = name.replace("<","[").replace(">","]").replace(" : "," – ").replace(": "," – ").replace(":","—").replace("/","_").replace("\\","_").replace("|","_").replace("\"","\'")
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# delete control characters
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name = "".join(char for char in name if ord(char)>=32)
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# white space to single space, delete leading and trailing while space
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name = re.sub(r"\s", " ", name).strip()
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# remove leading dots
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while len(name)>0 and name[0] == ".":
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name = name[1:]
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# remove trailing dots (Windows doesn't like them)
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if name.endswith("."):
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name = name[:-1]
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return name
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def fixKey(key):
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def fixByte(b):
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if sys.version_info[0] == 2:
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b = ord(b)
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return b ^ ((b ^ (b<<1) ^ (b<<2) ^ (b<<3) ^ (b<<4) ^ (b<<5) ^ (b<<6) ^ (b<<7) ^ 0x80) & 0x80)
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return bytes(bytearray([fixByte(a) for a in key]))
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def deXOR(text, sp, table):
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r=b''
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j = sp
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for i in range(len(text)):
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if sys.version_info[0] == 2:
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r += chr(ord(table[j]) ^ ord(text[i]))
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else:
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r += bytes(bytearray([table[j] ^ text[i]]))
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j = j + 1
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if j == len(table):
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j = 0
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return r
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class EreaderProcessor(object):
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def __init__(self, sect, user_key):
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self.section_reader = sect.loadSection
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data = self.section_reader(0)
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version, = struct.unpack('>H', data[0:2])
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self.version = version
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logging.info('eReader file format version %s', version)
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if version != 272 and version != 260 and version != 259:
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raise ValueError('incorrect eReader version %d (error 1)' % version)
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data = self.section_reader(1)
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self.data = data
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des = DES.new(fixKey(data[0:8]), DES.MODE_ECB)
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cookie_shuf, cookie_size = struct.unpack('>LL', des.decrypt(data[-8:]))
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if cookie_shuf < 3 or cookie_shuf > 0x14 or cookie_size < 0xf0 or cookie_size > 0x200:
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raise ValueError('incorrect eReader version (error 2)')
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input = des.decrypt(data[-cookie_size:])
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def unshuff(data, shuf):
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r = [0] * len(data)
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j = 0
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for i in range(len(data)):
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j = (j + shuf) % len(data)
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r[j] = data[i]
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assert len(bytes(r)) == len(data)
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return bytes(r)
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r = unshuff(input[0:-8], cookie_shuf)
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drm_sub_version = struct.unpack('>H', r[0:2])[0]
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self.num_text_pages = struct.unpack('>H', r[2:4])[0] - 1
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self.num_image_pages = struct.unpack('>H', r[26:26+2])[0]
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self.first_image_page = struct.unpack('>H', r[24:24+2])[0]
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# Default values
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self.num_footnote_pages = 0
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self.num_sidebar_pages = 0
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self.first_footnote_page = -1
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self.first_sidebar_page = -1
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if self.version == 272:
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self.num_footnote_pages = struct.unpack('>H', r[46:46+2])[0]
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self.first_footnote_page = struct.unpack('>H', r[44:44+2])[0]
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if (sect.bkType == "Book"):
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self.num_sidebar_pages = struct.unpack('>H', r[38:38+2])[0]
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self.first_sidebar_page = struct.unpack('>H', r[36:36+2])[0]
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# self.num_bookinfo_pages = struct.unpack('>H', r[34:34+2])[0]
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# self.first_bookinfo_page = struct.unpack('>H', r[32:32+2])[0]
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# self.num_chapter_pages = struct.unpack('>H', r[22:22+2])[0]
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# self.first_chapter_page = struct.unpack('>H', r[20:20+2])[0]
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# self.num_link_pages = struct.unpack('>H', r[30:30+2])[0]
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# self.first_link_page = struct.unpack('>H', r[28:28+2])[0]
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# self.num_xtextsize_pages = struct.unpack('>H', r[54:54+2])[0]
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# self.first_xtextsize_page = struct.unpack('>H', r[52:52+2])[0]
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# **before** data record 1 was decrypted and unshuffled, it contained data
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# to create an XOR table and which is used to fix footnote record 0, link records, chapter records, etc
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self.xortable_offset = struct.unpack('>H', r[40:40+2])[0]
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self.xortable_size = struct.unpack('>H', r[42:42+2])[0]
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self.xortable = self.data[self.xortable_offset:self.xortable_offset + self.xortable_size]
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else:
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# Nothing needs to be done
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pass
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# self.num_bookinfo_pages = 0
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# self.num_chapter_pages = 0
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# self.num_link_pages = 0
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# self.num_xtextsize_pages = 0
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# self.first_bookinfo_page = -1
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# self.first_chapter_page = -1
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# self.first_link_page = -1
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# self.first_xtextsize_page = -1
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logging.debug('self.num_text_pages %d', self.num_text_pages)
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logging.debug('self.num_footnote_pages %d, self.first_footnote_page %d', self.num_footnote_pages , self.first_footnote_page)
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logging.debug('self.num_sidebar_pages %d, self.first_sidebar_page %d', self.num_sidebar_pages , self.first_sidebar_page)
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self.flags = struct.unpack('>L', r[4:8])[0]
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reqd_flags = (1<<9) | (1<<7) | (1<<10)
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if (self.flags & reqd_flags) != reqd_flags:
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print("Flags: 0x%X" % self.flags)
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raise ValueError('incompatible eReader file')
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des = DES.new(fixKey(user_key), DES.MODE_ECB)
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if version == 259:
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if drm_sub_version != 7:
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raise ValueError('incorrect eReader version %d (error 3)' % drm_sub_version)
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encrypted_key_sha = r[44:44+20]
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encrypted_key = r[64:64+8]
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elif version == 260:
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if drm_sub_version != 13 and drm_sub_version != 11:
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raise ValueError('incorrect eReader version %d (error 3)' % drm_sub_version)
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if drm_sub_version == 13:
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encrypted_key = r[44:44+8]
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encrypted_key_sha = r[52:52+20]
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else:
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encrypted_key = r[64:64+8]
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encrypted_key_sha = r[44:44+20]
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elif version == 272:
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encrypted_key = r[172:172+8]
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encrypted_key_sha = r[56:56+20]
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self.content_key = des.decrypt(encrypted_key)
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if sha1(self.content_key).digest() != encrypted_key_sha:
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raise ValueError('Incorrect Name and/or Credit Card')
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def getNumImages(self):
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return self.num_image_pages
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def getImage(self, i):
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sect = self.section_reader(self.first_image_page + i)
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name = sect[4:4+32].strip(b'\0')
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data = sect[62:]
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return sanitizeFileName(name.decode('windows-1252')), data
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# def getChapterNamePMLOffsetData(self):
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# cv = ''
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# if self.num_chapter_pages > 0:
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# for i in xrange(self.num_chapter_pages):
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# chaps = self.section_reader(self.first_chapter_page + i)
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# j = i % self.xortable_size
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# offname = deXOR(chaps, j, self.xortable)
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# offset = struct.unpack('>L', offname[0:4])[0]
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# name = offname[4:].strip('\0')
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# cv += '%d|%s\n' % (offset, name)
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# return cv
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# def getLinkNamePMLOffsetData(self):
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# lv = ''
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# if self.num_link_pages > 0:
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# for i in xrange(self.num_link_pages):
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# links = self.section_reader(self.first_link_page + i)
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# j = i % self.xortable_size
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# offname = deXOR(links, j, self.xortable)
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# offset = struct.unpack('>L', offname[0:4])[0]
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# name = offname[4:].strip('\0')
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# lv += '%d|%s\n' % (offset, name)
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# return lv
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# def getExpandedTextSizesData(self):
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# ts = ''
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# if self.num_xtextsize_pages > 0:
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# tsize = deXOR(self.section_reader(self.first_xtextsize_page), 0, self.xortable)
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# for i in xrange(self.num_text_pages):
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# xsize = struct.unpack('>H', tsize[0:2])[0]
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# ts += "%d\n" % xsize
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# tsize = tsize[2:]
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# return ts
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# def getBookInfo(self):
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# bkinfo = ''
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# if self.num_bookinfo_pages > 0:
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# info = self.section_reader(self.first_bookinfo_page)
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# bkinfo = deXOR(info, 0, self.xortable)
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# bkinfo = bkinfo.replace('\0','|')
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# bkinfo += '\n'
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# return bkinfo
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def getText(self):
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des = DES.new(fixKey(self.content_key), DES.MODE_ECB)
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r = b''
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for i in range(self.num_text_pages):
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logging.debug('get page %d', i)
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r += zlib.decompress(des.decrypt(self.section_reader(1 + i)))
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# now handle footnotes pages
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if self.num_footnote_pages > 0:
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r += '\n'
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# the record 0 of the footnote section must pass through the Xor Table to make it useful
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sect = self.section_reader(self.first_footnote_page)
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fnote_ids = deXOR(sect, 0, self.xortable)
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# the remaining records of the footnote sections need to be decoded with the content_key and zlib inflated
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des = DES.new(fixKey(self.content_key), DES.MODE_ECB)
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for i in range(1,self.num_footnote_pages):
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logging.debug('get footnotepage %d', i)
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id_len = ord(fnote_ids[2])
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id = fnote_ids[3:3+id_len]
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fmarker = '<footnote id="%s">\n' % id
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fmarker += zlib.decompress(des.decrypt(self.section_reader(self.first_footnote_page + i)))
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fmarker += '\n</footnote>\n'
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r += fmarker
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fnote_ids = fnote_ids[id_len+4:]
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# TODO: Handle dictionary index (?) pages - which are also marked as
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# sidebar_pages (?). For now dictionary sidebars are ignored
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# For dictionaries - record 0 is null terminated strings, followed by
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# blocks of around 62000 bytes and a final block. Not sure of the
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# encoding
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# now handle sidebar pages
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if self.num_sidebar_pages > 0:
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r += '\n'
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# the record 0 of the sidebar section must pass through the Xor Table to make it useful
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sect = self.section_reader(self.first_sidebar_page)
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sbar_ids = deXOR(sect, 0, self.xortable)
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# the remaining records of the sidebar sections need to be decoded with the content_key and zlib inflated
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des = DES.new(fixKey(self.content_key), DES.MODE_ECB)
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for i in range(1,self.num_sidebar_pages):
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id_len = ord(sbar_ids[2])
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id = sbar_ids[3:3+id_len]
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smarker = '<sidebar id="%s">\n' % id
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smarker += zlib.decompress(des.decrypt(self.section_reader(self.first_sidebar_page + i)))
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smarker += '\n</sidebar>\n'
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r += smarker
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sbar_ids = sbar_ids[id_len+4:]
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return r
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def cleanPML(pml):
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# Convert special characters to proper PML code. High ASCII start at (\x80, \a128) and go up to (\xff, \a255)
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pml2 = pml
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for k in range(128,256):
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pml2 = pml2.replace(bytes([k]), b'\\a%03d' % k)
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return pml2
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def decryptBook(infile, outpath, make_pmlz, user_key):
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bookname = os.path.splitext(os.path.basename(infile))[0]
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if make_pmlz:
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# outpath is actually pmlz name
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pmlzname = outpath
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outdir = tempfile.mkdtemp()
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imagedirpath = os.path.join(outdir,"images")
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else:
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pmlzname = None
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outdir = outpath
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imagedirpath = os.path.join(outdir,bookname + "_img")
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try:
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if not os.path.exists(outdir):
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os.makedirs(outdir)
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print("Decoding File")
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sect =Sectionizer(infile, b'PNRdPPrs')
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er = EreaderProcessor(sect, user_key)
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if er.getNumImages() > 0:
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print("Extracting images")
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if not os.path.exists(imagedirpath):
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os.makedirs(imagedirpath)
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for i in range(er.getNumImages()):
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name, contents = er.getImage(i)
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open(os.path.join(imagedirpath, name), 'wb').write(contents)
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print("Extracting pml")
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pml_string = er.getText()
|
||
pmlfilename = bookname + ".pml"
|
||
open(os.path.join(outdir, pmlfilename),'wb').write(cleanPML(pml_string))
|
||
if pmlzname is not None:
|
||
import zipfile
|
||
import shutil
|
||
print("Creating PMLZ file {0}".format(os.path.basename(pmlzname)))
|
||
myZipFile = zipfile.ZipFile(pmlzname,'w',zipfile.ZIP_STORED, False)
|
||
list = os.listdir(outdir)
|
||
for filename in list:
|
||
localname = filename
|
||
filePath = os.path.join(outdir,filename)
|
||
if os.path.isfile(filePath):
|
||
myZipFile.write(filePath, localname)
|
||
elif os.path.isdir(filePath):
|
||
imageList = os.listdir(filePath)
|
||
localimgdir = os.path.basename(filePath)
|
||
for image in imageList:
|
||
localname = os.path.join(localimgdir,image)
|
||
imagePath = os.path.join(filePath,image)
|
||
if os.path.isfile(imagePath):
|
||
myZipFile.write(imagePath, localname)
|
||
myZipFile.close()
|
||
# remove temporary directory
|
||
shutil.rmtree(outdir, True)
|
||
print("Output is {0}".format(pmlzname))
|
||
else:
|
||
print("Output is in {0}".format(outdir))
|
||
print("done")
|
||
except ValueError as e:
|
||
print("Error: {0}".format(e))
|
||
traceback.print_exc()
|
||
return 1
|
||
return 0
|
||
|
||
|
||
def usage():
|
||
print("Converts DRMed eReader books to PML Source")
|
||
print("Usage:")
|
||
print(" erdr2pml [options] infile.pdb [outpath] \"your name\" credit_card_number")
|
||
print(" ")
|
||
print("Options: ")
|
||
print(" -h prints this message")
|
||
print(" -p create PMLZ instead of source folder")
|
||
print(" --make-pmlz create PMLZ instead of source folder")
|
||
print(" ")
|
||
print("Note:")
|
||
print(" if outpath is ommitted, creates source in 'infile_Source' folder")
|
||
print(" if outpath is ommitted and pmlz option, creates PMLZ 'infile.pmlz'")
|
||
print(" if source folder created, images are in infile_img folder")
|
||
print(" if pmlz file created, images are in images folder")
|
||
print(" It's enough to enter the last 8 digits of the credit card number")
|
||
return
|
||
|
||
def getuser_key(name,cc):
|
||
newname = "".join(c for c in name.lower() if c >= 'a' and c <= 'z' or c >= '0' and c <= '9')
|
||
cc = cc.replace(" ","")
|
||
return struct.pack('>LL', binascii.crc32(bytes(newname.encode('utf-8'))) & 0xffffffff, binascii.crc32(bytes(cc[-8:].encode('utf-8'))) & 0xffffffff)
|
||
|
||
def cli_main():
|
||
print("eRdr2Pml v{0}. Copyright © 2009–2020 The Dark Reverser et al.".format(__version__))
|
||
|
||
argv=unicode_argv("erdr2pml.py")
|
||
try:
|
||
opts, args = getopt.getopt(argv[1:], "hp", ["make-pmlz"])
|
||
except getopt.GetoptError as err:
|
||
print(err.args[0])
|
||
usage()
|
||
return 1
|
||
make_pmlz = False
|
||
for o, a in opts:
|
||
if o == "-h":
|
||
usage()
|
||
return 0
|
||
elif o == "-p":
|
||
make_pmlz = True
|
||
elif o == "--make-pmlz":
|
||
make_pmlz = True
|
||
|
||
if len(args)!=3 and len(args)!=4:
|
||
usage()
|
||
return 1
|
||
|
||
if len(args)==3:
|
||
infile, name, cc = args
|
||
if make_pmlz:
|
||
outpath = os.path.splitext(infile)[0] + ".pmlz"
|
||
else:
|
||
outpath = os.path.splitext(infile)[0] + "_Source"
|
||
elif len(args)==4:
|
||
infile, outpath, name, cc = args
|
||
|
||
print(binascii.b2a_hex(getuser_key(name,cc)))
|
||
|
||
return decryptBook(infile, outpath, make_pmlz, getuser_key(name,cc))
|
||
|
||
|
||
if __name__ == "__main__":
|
||
sys.stdout=SafeUnbuffered(sys.stdout)
|
||
sys.stderr=SafeUnbuffered(sys.stderr)
|
||
sys.exit(cli_main())
|
||
|