185 lines
7.3 KiB
Python
185 lines
7.3 KiB
Python
from typing import Tuple, Dict, List
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from starlette.requests import Request
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from starlette.responses import Response, PlainTextResponse, FileResponse
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from starlette.routing import Route
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import yaml
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import logging, coloredlogs
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from logging.handlers import TimedRotatingFileHandler
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from os import path
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from Crypto.Cipher import Blowfish
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from Crypto.Hash import MD5
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import secrets
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import traceback
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import sys
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from core import CoreConfig
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from core.title import BaseServlet
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from core.utils import Utils
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from titles.sao.config import SaoConfig
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from titles.sao.const import SaoConstants
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from titles.sao.base import SaoBase
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from titles.sao.handlers.base import *
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class SaoServlet(BaseServlet):
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def __init__(self, core_cfg: CoreConfig, cfg_dir: str) -> None:
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super().__init__(core_cfg, cfg_dir)
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self.config_dir = cfg_dir
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self.game_cfg = SaoConfig()
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if path.exists(f"{cfg_dir}/sao.yaml"):
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self.game_cfg.update(yaml.safe_load(open(f"{cfg_dir}/sao.yaml")))
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self.logger = logging.getLogger("sao")
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if not hasattr(self.logger, "inited"):
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log_fmt_str = "[%(asctime)s] SAO | %(levelname)s | %(message)s"
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log_fmt = logging.Formatter(log_fmt_str)
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fileHandler = TimedRotatingFileHandler(
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"{0}/{1}.log".format(self.core_cfg.server.log_dir, "sao"),
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encoding="utf8",
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when="d",
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backupCount=10,
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)
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fileHandler.setFormatter(log_fmt)
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consoleHandler = logging.StreamHandler()
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consoleHandler.setFormatter(log_fmt)
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self.logger.addHandler(fileHandler)
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self.logger.addHandler(consoleHandler)
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self.logger.setLevel(self.game_cfg.server.loglevel)
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coloredlogs.install(
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level=self.game_cfg.server.loglevel, logger=self.logger, fmt=log_fmt_str
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)
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self.logger.inited = True
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self.base = SaoBase(core_cfg, self.game_cfg)
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self.static_hash = None
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if self.game_cfg.hash.verify_hash:
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self.static_hash = MD5.new(self.game_cfg.hash.hash_base.encode()).digest() # Greate hashing guys, really validates the data
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def get_routes(self) -> List[Route]:
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return [
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Route("/{datecode:int}/proto/if/{category:str}/{endpoint:str}", self.render_POST, methods=['POST']),
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Route("/saoresource/{resource_type:str}/{resource_id:int}/{endpoint:str}", self.handle_resource),
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Route("/system_status.php", self.render_system_status),
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]
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@classmethod
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def is_game_enabled(cls, game_code: str, core_cfg: CoreConfig, cfg_dir: str) -> bool:
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game_cfg = SaoConfig()
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if path.exists(f"{cfg_dir}/{SaoConstants.CONFIG_NAME}"):
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game_cfg.update(
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yaml.safe_load(open(f"{cfg_dir}/{SaoConstants.CONFIG_NAME}"))
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)
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if not game_cfg.server.enable:
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return False
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return True
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def get_allnet_info(self, game_id: str, int_ver: int, serial: str) -> Tuple[str, str]:
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if self.core_cfg.server.is_using_proxy:
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return (f"https://{self.core_cfg.server.hostname}/", "")
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return (f"http://{self.core_cfg.server.hostname}:{Utils.get_title_port(self.core_cfg)}/", "")
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def get_mucha_info(self, core_cfg: CoreConfig, cfg_dir: str) -> Tuple[bool, List[str], List[str]]:
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if not self.game_cfg.server.enable:
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return (False, [], [])
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return (True, SaoConstants.GAME_CDS, SaoConstants.NETID_PREFIX)
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async def render_system_status(self, request: Request) -> bytes:
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return PlainTextResponse("open")
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async def render_POST(self, request: Request) -> bytes:
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endpoint = request.path_params['endpoint']
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ip = Utils.get_ip_addr(request)
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iv = b""
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req_raw = await request.body()
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if len(req_raw) < 40:
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self.logger.warn(f"Malformed request to {endpoint} - {req_raw.hex()}")
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return Response()
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req_header = SaoRequestHeader(req_raw)
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cmd_str = f"{req_header.cmd:04x}"
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if self.game_cfg.hash.verify_hash and self.static_hash != req_header.hash:
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self.logger.error(f"Hash mismatch! Expecting {self.static_hash} but recieved {req_header.hash}")
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return Response()
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if self.game_cfg.crypt.enable:
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iv = req_raw[40:48]
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cipher = Blowfish.new(self.game_cfg.crypt.key.encode(), Blowfish.MODE_CBC, iv)
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crypt_data = req_raw[48:]
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req_data = cipher.decrypt(crypt_data)
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self.logger.debug(f"Decrypted {req_data.hex()} with IV {iv.hex()}")
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else:
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req_data = req_raw[40:]
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self.logger.debug(f"{endpoint} ({cmd_str}) Request from {ip}: {req_raw.hex()}")
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handler = getattr(self.base, f"handle_{cmd_str}", None)
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if handler is None:
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self.logger.info(f"Using Generic handler for {endpoint}")
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handler = self.base.handle_noop
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try:
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resp = await handler(req_header, req_data, ip)
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except Exception as e:
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self.logger.error(f"Error handling {endpoint} - {e}")
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tp, val, tb = sys.exc_info()
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traceback.print_exception(tp, val, tb, limit=5)
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with open("{0}/{1}.log".format(self.core_cfg.server.log_dir, "sao"), "a") as f:
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traceback.print_exception(tp, val, tb, limit=5, file=f)
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resp = SaoNoopResponse(req_header.cmd + 1).make()
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if resp is None:
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resp = SaoNoopResponse(req_header.cmd + 1).make()
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if type(resp) == bytes:
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pass
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elif issubclass(resp, SaoBaseResponse):
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resp = resp.make()
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else:
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self.logger.error(f"Unknown response type {type(resp)}")
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return SaoNoopResponse(req_header.cmd + 1).make()
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self.logger.debug(f"Response: {resp.hex()}")
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if self.game_cfg.crypt.enable:
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iv = secrets.token_bytes(8)
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data_to_crypt = resp[24:]
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while len(data_to_crypt) % 8 != 0:
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data_to_crypt += b"\x00"
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cipher = Blowfish.new(self.game_cfg.crypt.key.encode(), Blowfish.MODE_CBC, iv)
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data_crypt = cipher.encrypt(data_to_crypt)
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crypt_data_len = len(data_crypt) + len(iv)
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tmp = struct.pack("!I", crypt_data_len) # does it want the length of the encrypted response??
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resp = resp[:20] + tmp + iv + data_crypt
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self.logger.debug(f"Encrypted Response: {resp.hex()}")
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return Response(resp)
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async def handle_resource(self, request: Request) -> bytes:
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# TODO: better guard against path traversal attacks
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resource_type = request.path_params['resource_type'].replace(".\\", "").replace("..\\", "")
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resource_id = request.path_params['resource_id']
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endpoint = request.path_params['endpoint'].replace(".\\", "").replace("..\\", "")
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req_ip = Utils.get_ip_addr(request)
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self.logger.debug(f"{req_ip} requested {resource_type} id {resource_id} {endpoint}")
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if path.exists(f"./titles/sao/data/{resource_type}/{resource_id}/{endpoint}"):
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return FileResponse(f"./titles/sao/data/{resource_type}/{resource_id}/{endpoint}")
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return Response(status_code=404)
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