Major refactor. Release 0.0.1

- Now possible to give .iso and .ird and get a decrypted output.iso

libray/core.py

@@ -0,0 +1,82 @@
+# -*- coding: utf8 -*-
+
+# libray - Libre Blu-Ray PS3 ISO Tool
+# Copyright (C) 2018 Nichlas Severinsen
+# 
+# This file is part of libray.
+# 
+# libray is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# libray is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with libray.  If not, see <https://www.gnu.org/licenses/>.
+
+import os
+import sys
+
+try:
+  from libray import iso
+except ImportError:
+  import iso
+
+# Magic numbers / Constant variables
+
+SECTOR = 2048
+
+# Utility functions
+
+def to_int(data, order='big'):
+  if isinstance(data, bytes):
+    return int.from_bytes(data, order)
+
+
+def to_bytes(data):
+  if isinstance(data, str):
+    return bytes(bytearray.fromhex(data))
+
+
+ISO_SECRET = to_bytes("380bcf0b53455b3c7817ab4fa3ba90ed")
+ISO_IV = to_bytes("69474772af6fdab342743aefaa186287")
+
+
+def filesize(filename):
+  return os.stat(filename).st_size
+
+
+def read_seven_bit_encoded_int(fileobj, order):
+  # Read out an Int32 7 bits at a time. The high bit
+  # of the byte when on means to continue reading more bytes
+  count = 0
+  shift = 0
+  byte = -1
+  while (byte & 0x80) != 0 or byte == -1:
+    # Check for a corrupted stream. Read a max of 5 bytes.
+    if shift == (5 * 7):
+      raise ValueError
+    byte = to_int(fileobj.read(1), order)
+    count |= (byte & 0x7F) << shift
+    shift += 7
+  return count
+
+
+def error(msg):
+  print('ERROR: %s' % msg)
+  sys.exit(1)
+
+# Main functions
+
+def decrypt(args):
+
+  input_iso = iso.ISO(args)
+
+  input_iso.decrypt(args)
+
+  
+