# coding:utf-8
 
import os
import shutil
import zlib
 
PM9SCREW = b'\tPM9SCREW\t'
PM9SCREW_LEN = len(PM9SCREW)
pm9screw_mycryptkey = [11152, 368, 192, 1281, 62]
cryptkey_len = len(pm9screw_mycryptkey)
 
 
def decrypt(path, write=True):
    data = bytearray(open(path, 'rb').read())
 
    if len(data) < PM9SCREW_LEN:
        return False
 
    if data[:PM9SCREW_LEN] != PM9SCREW:
        return False
    data = data[PM9SCREW_LEN:]
    data_len = len(data)
    out = bytearray(data_len)
    for i in range(data_len):
        out[i] = (pm9screw_mycryptkey[(data_len - i) % cryptkey_len]
                  ^ (~data[i])) % 256
    try:
        new = zlib.decompress(out)
    except TypeError:
        new = zlib.decompress(bytes(out)).encode()
    if write:
        shutil.move(path, path + ".bak")
        open(path, 'wb').write(new)
    else:
        print(new)
 
 
def multi_decrypt(path):
    if not os.path.exists(path):
        print('Error: %s not Found.' % path)
        return
 
    if os.path.isdir(path):
        folder = os.walk(path)
 
        for fpathe, dirs, fs in folder:
            for f in fs:
                if f.endswith('.php'):
                    decrypt(os.path.join(fpathe, f), True)
    else:
        decrypt(path)
 
 
if __name__ == '__main__':
    multi_decrypt('./')