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unpacker.py
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unpacker.py
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import logging
import os
import re
import shutil
import sys
import zlib
DEV_NULL = 'nul' if sys.platform == 'win32' else '/dev/null'
def unpack(f, dest_dir=None, do_decompile=False):
if not os.path.exists(f):
raise(OSError('File does not exist'))
os.environ['PATH'] = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'bin', sys.platform) + os.pathsep + os.environ['PATH']
fn = os.path.basename(f)
bn, ext = os.path.splitext(fn)
ext = ext.lower()
if os.path.isdir(f) and ext == '.app': # macOS projector.app bundle?
fn_bin = os.path.join(f, 'Contents', 'MacOS', bn)
bin_file = None
if os.path.isdir(fn_bin):
bin_file = fn_bin
else:
l = os.listdir(os.path.join(f, 'Contents', 'MacOS'))
if len(l):
bin_file = os.path.join(f, 'Contents', 'MacOS', l[0])
if bin_file is not None:
logging.info(f'Unpacking Mac OS X/macOS projector "{fn}"...')
output_dir = os.path.join(dest_dir if dest_dir else os.path.dirname(f), bn + '_contents')
if os.path.isdir(output_dir):
shutil.rmtree(output_dir)
os.mkdir(output_dir)
return unpack_projector(bin_file, output_dir, do_decompile)
elif ext == '.exe': # Windows projector.exe?
logging.info(f'Unpacking Windows projector "{fn}"...')
output_dir = os.path.join(dest_dir if dest_dir else os.path.dirname(f), bn + '_contents')
if os.path.isdir(output_dir):
shutil.rmtree(output_dir)
os.mkdir(output_dir)
return unpack_projector(f, output_dir, do_decompile)
# check if it's an old Mac OS 9- 68k/PPC/FAT binary
with open(f, 'rb') as fh:
magic = fh.read(4)
is_macos_bin = magic[:2] == b'PJ' or magic[2:] == b'JP'
if not is_macos_bin:
MAGIC_MACOS = [
b'Joy!', # D10- mac projector
b'\xCA\xFE\xBA\xBE', # D11+ Projector Resource
b'\xCE\xFA\xED\xFE', # D11+ Projector Intel Resource
b'RIFX' # data fork of classic mac app
]
for m in MAGIC_MACOS:
if magic == m:
is_macos_bin = True
break
if is_macos_bin:
logging.info(f'Unpacking Mac OS projector "{fn}"...')
output_dir = os.path.join(dest_dir if dest_dir else os.path.dirname(f), bn + '_contents')
if os.path.isdir(output_dir):
shutil.rmtree(output_dir)
os.mkdir(output_dir)
return unpack_projector(f, output_dir, do_decompile)
raise(TypeError('File not supported'))
def unpack_projector (exe_file, output_dir, do_decompile=False):
with open(exe_file, 'rb') as fh:
data_full = fh.read()
m1 = re.search(b'RIFX([\x00-\xFF]{4})APPL', data_full)
m2 = re.search(b'XFIR([\x00-\xFF]{4})LPPA', data_full)
if m1 and m2:
start_pos = m1.start() if m1.start() < m2.start() else m2.start()
byteorder = 'big' if m1.start() < m2.start() else 'little'
elif m1:
start_pos = m1.start()
byteorder = 'big'
elif m2:
start_pos = m2.start()
byteorder = 'little'
else:
raise(TypeError('Could not identify file as Director projector'))
offset = 32
data_full = data_full[offset:]
exe_size = len(data_full)
# find RIFX/XFIR and RIFF chunks
res = []
res2 = []
xres = []
start_pos += 12
data = data_full[start_pos:]
# find embedded movies/castlibs
if byteorder == 'big':
for m in re.finditer(b'RIFX([\x00-\xFF]{4})(MV93|MC95)', data):
res.append([m.start(), m.group()[8:]])
for m in re.finditer(b'RIFX([\x00-\xFF]{4})(FGDM|FGDC)', data):
res2.append([m.start(), m.group()[8:]])
else:
for m in re.finditer(b'XFIR([\x00-\xFF]{4})(39VM|59CM)', data):
res.append([m.start(), m.group()[8:]])
for m in re.finditer(b'XFIR([\x00-\xFF]{4})(MDGF|CDGF)', data):
res2.append([m.start(), m.group()[8:]])
if len(res) == 0:
if len(res2) == 0:
return print('Nothing found to extract!')
else:
compressed = True
res = res2
else:
compressed = False
# find embedded xtras
for m in re.finditer(b'RIFF([\x00-\xFF]{4})XtraFILE', data):
xres.append(m.start())
is_16bit = False
if len(xres) == 0:
for m in re.finditer(b'XFIR([\x00-\xFF]{4})artX', data):
xres.append(m.start())
is_16bit = len(xres) > 0
# header template
header = ((b'RIFX' if byteorder == 'big' else b'XFIR') +
int.to_bytes(exe_size - 8 + offset, 4, byteorder) +
(b'MV93imap' if byteorder == 'big' else b'39VMpami') +
int.to_bytes(24, 4, byteorder) +
int.to_bytes(1, 4, byteorder))
# extract file names from Dict chunk
dir_names = []
xtra_names = []
pos = res[0][0] # position of first XFIR/RIFX chunk
# find last 'Dict' (littleEndian: 'tciD') before this position
m = None
for m in re.finditer(b'Dict' if byteorder == 'big' else b'tciD', data[:pos-3]):
pass
if m:
dict = data[m.start():pos]
cnt = int.from_bytes(dict[24:28], byteorder)
byteorder_dict = byteorder
offset_dict = 0
if cnt > 0xFFFF: # 16-bit win projector
byteorder_dict = 'big'
cnt = int.from_bytes(dict[24:28], byteorder_dict)
offset_dict = 2
if cnt == 1:
# finding actual original filename would require parsing .dir file, so we use the projector name instead
bn, _ = os.path.splitext(os.path.basename(exe_file))
dir_names.append(bn + '.dxr')
else:
pt = cnt * 8 + 64 - offset_dict
for i in range(cnt):
flen = int.from_bytes(dict[pt:pt+4], byteorder_dict)
fn = dict[pt + 4:pt + 4 + flen]
if b'Xtras:' in fn or fn.endswith(b' Xtra') or fn.lower().endswith(b'.x32') or fn.lower().endswith(b'.x16') or fn.endswith(b'.cpio'):
xtra_names.append(get_filename(fn.decode()))
else:
dir_names.append(get_filename(fn.decode()))
if i < cnt - 1:
pt += 4 + flen + (4 - flen % 4 if flen % 4 else 0)
if compressed: # compressed files
logging.info('Files in projector are compressed.')
file_num = 0
for r in res:
pos = r[0]
fn = dir_names[file_num]
file_num += 1
_, ext = os.path.splitext(fn)
ext = ext.lower()
if ext == '':
fn += '.dcr' # just guessing
else:
fn = fn[:-4] + ('.cct' if ext == '.cst' else '.dcr')
chunk_size = int.from_bytes(data[pos + 4:pos + 8], byteorder)
fn = os.path.join(output_dir, sanitize_filename(fn))
with open(fn, 'wb') as fh:
fh.write(data[pos:pos + chunk_size + 8])
if do_decompile:
decompile(fn)
rebuild(fn)
else: # non-compressed files
logging.info('Files in projector are not compressed.')
file_num = 0
for r in res:
pos = r[0] + 32 + offset
fn = dir_names[file_num]
file_num += 1
_, ext = os.path.splitext(fn)
ext = ext.lower()
if ext == '': # just guessing
fn += '.dxr'
else:
fn = fn[:-4] + ('.cxt' if ext == '.cst' else '.dxr')
fn = os.path.join(output_dir, sanitize_filename(fn))
with open(fn, 'wb') as fh:
fh.write(header)
fh.write(int.to_bytes(start_pos + pos + 12, 4, byteorder))
fh.write(int.to_bytes(1923, 4, byteorder))
fh.write(data_full)
if do_decompile:
decompile(fn)
rebuild(fn)
# extract xtras
file_num = 0
if is_16bit:
for pos in xres:
pos += 49
xnam_len = int.from_bytes(data[pos:pos+4], byteorder)
pos += xnam_len + 8 + xnam_len % 2
data_len = int.from_bytes(data[pos:pos+4], byteorder)
pos += 4
xdata = data[pos:pos + data_len]
fn = xtra_names[file_num]
file_num += 1
xdata = zlib.decompress(xdata)
with open(os.path.join(output_dir, sanitize_filename(fn)), 'wb') as fh:
fh.write(xdata)
else:
for pos in xres:
chunk_size = int.from_bytes(data[pos:pos+4], 'big') # always big endian
xdata = data[pos + 48:pos + 48 + chunk_size]
fn = xtra_names[file_num]
file_num += 1
xdata = zlib.decompress(xdata)
with open(os.path.join(output_dir, sanitize_filename(fn)), 'wb') as fh:
fh.write(xdata)
return output_dir, len(res), len(xres)
def rebuild(fn):
dest_file = fn + '.tmp'
exit_code = os.system(f'ProjectorRays --rebuild-only "{fn}" "{dest_file}" >{DEV_NULL}')
if exit_code != 0:
raise(OSError('Rebuilding failed'))
if os.path.isfile(dest_file):
os.unlink(fn)
os.rename(dest_file, fn)
def decompile(fn):
dest_file, ext = os.path.splitext(fn)
ext = ext.lower()
dest_file += ('_decompiled.cst' if ext == '.cxt' or ext == '.cct' else '_decompiled.dir')
exit_code = os.system(f'ProjectorRays "{fn}" "{dest_file}" >{DEV_NULL}')
if exit_code != 0:
raise(OSError('Decompiling failed'))
def get_filename(fn):
''' cross-platform, extracts filename of Windows, POSIX or Mac OS path '''
if "/" in fn:
pd = "/" # POSIX (macOS/Mac OS X)
elif "\\" in fn:
pd = "\\" # Windows
else:
pd = ":" # classic Mac OS
return fn.split(pd)[-1]
def sanitize_filename(fn):
for c in r'\/:*?"<>|':
fn = fn.replace(c, '_')
return fn
if __name__ == '__main__':
args = sys.argv[1:]
verbose = '-verbose' in args
if verbose:
logging.basicConfig(level = logging.INFO, format = '[%(levelname)s] %(message)s')
args.remove('-verbose')
do_decompile = '-decompile' in args
if do_decompile:
args.remove('-decompile')
if len(args):
output_dir, num_dirs, num_xtras = unpack(args[0], do_decompile=do_decompile)
print(f'Done. {num_dirs+num_xtras} files were extracted to "{output_dir}".')
else:
print('Usage: python unpacker.py [-verbose] [-decompile] <projector-file>')