Oracle/LibRay
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Decryping, but encoding is borked

Browse source
This commit is contained in:
Nichlas Severinsen 2018-06-23 18:58:38 +02:00
parent 730b54d6bf
commit cfa8b1ca66
3 changed files with 101 additions and 25 deletions
Download patch file Download diff file Expand all files Collapse all files

61
LibRay-PS3/core.py
View file

@ -21,11 +21,32 @@ import sys
import gzip
ORDER = 'big'
IRD_ORDER = 'little'
SECTOR = 2048
def bytes_to_int(byte):
return int.from_bytes(byte, ORDER)
def ird_bytes_to_int(byte):
return int.from_bytes(byte, IRD_ORDER)
def read_seven_bit_encoded_int(fileobj):
# 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 = ird_bytes_to_int(fileobj.read(1))
count |= (byte & 0x7F) << shift
shift += 7
print(byte, count, shift)
return count
class IRD:
def is_compressed(self, fileobj):
@ -38,28 +59,54 @@ class IRD:
outfile.write(gzfile.read())
def __init__(self, filename):
with open(filename, 'rb') as fileobj:
if self.is_compressed(fileobj):
self.uncompress(filename)
self.size = os.stat('ird').st_size
with open('ird', 'rb') as ird:
self.magic_string = ird.read(4)
self.version = bytes_to_int(ird.read(1))
self.version = ird_bytes_to_int(ird.read(1))
self.game_id = ird.read(9)
self.game_name = ird.read(12)
length = read_seven_bit_encoded_int(ird)
self.game_name = ird.read(length)
self.update_version = ird.read(4)
self.game_version = ird.read(5)
self.app_version = ird.read(5)
if self.version == 7:
self.identifier = ird.read(4)
self.header = ird.read(SECTOR*3)
self.footer = ird.read(SECTOR)
self.region_count = ird.read(1)
if self.version < 9:
back = ird.tell()
length = read_seven_bit_encoded_int(ird)
if length:
self.header = ird.read(length)
else:
ird.seek(back)
back = ird.tell()
length = read_seven_bit_encoded_int(ird)
if length:
self.footer = ird.read(length)
else:
ird.seek(back)
self.region_count = ird_bytes_to_int(ird.read(1))
self.region_hash = []
for i in range(0, self.region_count):
self.region_hash.append(ird.read(16))
self.file_count = ird_bytes_to_int(ird.read(4))
print(vars(self) )
return
sys.exit()
back = ird.tell()
prefix = bytes_to_int(ird.read(1))
length = prefix >> 1
if prefix & 0b00000001:
ird.seek(back)
self.header = ird.read(length)
back = ird.tell()
@ -68,8 +115,6 @@ class IRD:
ird.seek(back)
self.footer = ird.read(length)
self.region_count
print()
sys.exit()
print(self.game_name, self.update_version, self.game_version, self.region_count)