MobiDeDRM 0.07

This commit is contained in:
Apprentice Alf 2009-12-17 21:57:04 +00:00
parent 988267e00e
commit 1f968255fe
1 changed files with 67 additions and 16 deletions

View File

@ -1,6 +1,16 @@
#!/usr/bin/python
#
# This is a python script. You need a Python interpreter to run it.
# For example, ActiveState Python, which exists for windows.
#
# It can run standalone to convert files, or it can be installed as a
# plugin for Calibre (http://calibre-ebook.com/about) so that
# importing files with DRM 'Just Works'.
#
# To create a Calibre plugin, rename this file so that the filename
# ends in '_plugin.py', put it into a ZIP file and import that Calibre
# using its plugin configuration GUI.
#
# Changelog
# 0.01 - Initial version
# 0.02 - Huffdic compressed books were not properly decrypted
@ -8,6 +18,7 @@
# 0.04 - Wasn't sanity checking size of data record
# 0.05 - It seems that the extra data flags take two bytes not four
# 0.06 - And that low bit does mean something after all :-)
# 0.07 - The extra data flags aren't present in MOBI header < 0xE8
import sys,struct,binascii
@ -142,16 +153,22 @@ class DrmStripper:
records, = struct.unpack('>H', sect[0x8:0x8+2])
mobi_length, = struct.unpack('>L',sect[0x14:0x18])
extra_data_flags = 0
if mobi_length >= 0xE4:
if mobi_length >= 0xE8:
extra_data_flags, = struct.unpack('>H', sect[0xF2:0xF4])
crypto_type, = struct.unpack('>H', sect[0xC:0xC+2])
if crypto_type == 0:
raise DrmException("it seems that this book isn't encrypted")
if crypto_type == 1:
raise DrmException("cannot decode Mobipocket encryption type 1")
if crypto_type != 2:
raise DrmException("invalid encryption type: %d" % crypto_type)
raise DrmException("unknown encryption type: %d" % crypto_type)
# calculate the keys
drm_ptr, drm_count, drm_size, drm_flags = struct.unpack('>LLLL', sect[0xA8:0xA8+16])
if drm_count == 0:
raise DrmException("no PIDs found in this file")
found_key = self.parseDRM(sect[drm_ptr:drm_ptr+drm_size], drm_count, pid)
if not found_key:
raise DrmException("no key found. maybe the PID is incorrect")
@ -173,17 +190,51 @@ class DrmStripper:
def getResult(self):
return self.data_file
print "MobiDeDrm v0.06. Copyright (c) 2008 The Dark Reverser"
if len(sys.argv)<4:
print "Removes protection from Mobipocket books"
print "Usage:"
print " mobidedrm infile.mobi outfile.mobi PID"
else:
infile = sys.argv[1]
outfile = sys.argv[2]
pid = sys.argv[3]
data_file = file(infile, 'rb').read()
try:
file(outfile, 'wb').write(DrmStripper(data_file, pid).getResult())
except DrmException, e:
print "Error: %s" % e
if not __name__ == "__main__":
from calibre.customize import FileTypePlugin
class MobiDeDRM(FileTypePlugin):
name = 'MobiDeDRM' # Name of the plugin
description = 'Removes DRM from secure Mobi files'
supported_platforms = ['linux', 'osx', 'windows'] # Platforms this plugin will run on
author = 'The Dark Reverser' # The author of this plugin
version = (0, 0, 7) # The version number of this plugin
file_types = set(['prc']) # The file types that this plugin will be applied to
on_import = True # Run this plugin during the import
def run(self, path_to_ebook):
of = self.temporary_file('.mobi')
PID = self.site_customization
data_file = file(path_to_ebook, 'rb').read()
try:
file(of.name, 'wb').write(DrmStripper(data_file, PID).getResult())
except Exception, e:
# Hm, we should display an error dialog here.
# Dunno how though.
# Ignore the dirty hack behind the curtain.
# strexcept = 'echo exception: %s > /dev/tty' % e
# subprocess.call(strexcept,shell=True)
raise e
return of.name
def customization_help(self, gui=False):
return 'Enter PID'
if __name__ == "__main__":
print "MobiDeDrm v0.07. Copyright (c) 2008 The Dark Reverser"
if len(sys.argv)<4:
print "Removes protection from Mobipocket books"
print "Usage:"
print " mobidedrm infile.mobi outfile.mobi PID"
else:
infile = sys.argv[1]
outfile = sys.argv[2]
pid = sys.argv[3]
data_file = file(infile, 'rb').read()
try:
file(outfile, 'wb').write(DrmStripper(data_file, pid).getResult())
except DrmException, e:
print "Error: %s" % e