369 lines
14 KiB
Python
369 lines
14 KiB
Python
from starlette.requests import Request
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from starlette.routing import Route
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from starlette.responses import Response
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import logging
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import coloredlogs
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from logging.handlers import TimedRotatingFileHandler
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import zlib
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import yaml
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import json
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import inflection
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import string
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from Crypto.Cipher import AES
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from Crypto.Util.Padding import pad
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from Crypto.Protocol.KDF import PBKDF2
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from Crypto.Hash import SHA1
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from os import path
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from typing import Tuple, Dict, List
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from core import CoreConfig, Utils
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from core.title import BaseServlet
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from .config import ChuniConfig
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from .const import ChuniConstants
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from .base import ChuniBase
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from .plus import ChuniPlus
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from .air import ChuniAir
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from .airplus import ChuniAirPlus
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from .star import ChuniStar
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from .starplus import ChuniStarPlus
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from .amazon import ChuniAmazon
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from .amazonplus import ChuniAmazonPlus
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from .crystal import ChuniCrystal
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from .crystalplus import ChuniCrystalPlus
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from .paradise import ChuniParadise
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from .new import ChuniNew
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from .newplus import ChuniNewPlus
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from .sun import ChuniSun
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from .sunplus import ChuniSunPlus
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from .luminous import ChuniLuminous
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class ChuniServlet(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.game_cfg = ChuniConfig()
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self.hash_table: Dict[str, Dict[str, str]] = {}
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if path.exists(f"{cfg_dir}/{ChuniConstants.CONFIG_NAME}"):
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self.game_cfg.update(
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yaml.safe_load(open(f"{cfg_dir}/{ChuniConstants.CONFIG_NAME}"))
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)
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self.versions = [
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ChuniBase,
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ChuniPlus,
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ChuniAir,
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ChuniAirPlus,
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ChuniStar,
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ChuniStarPlus,
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ChuniAmazon,
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ChuniAmazonPlus,
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ChuniCrystal,
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ChuniCrystalPlus,
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ChuniParadise,
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ChuniNew,
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ChuniNewPlus,
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ChuniSun,
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ChuniSunPlus,
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ChuniLuminous,
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]
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self.logger = logging.getLogger("chuni")
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if not hasattr(self.logger, "inited"):
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log_fmt_str = "[%(asctime)s] Chunithm | %(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, "chuni"),
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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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known_iter_counts = {
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ChuniConstants.VER_CHUNITHM_CRYSTAL_PLUS: 67,
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f"{ChuniConstants.VER_CHUNITHM_CRYSTAL_PLUS}_int": 25, # SUPERSTAR
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ChuniConstants.VER_CHUNITHM_PARADISE: 44,
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f"{ChuniConstants.VER_CHUNITHM_PARADISE}_int": 51, # SUPERSTAR PLUS
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ChuniConstants.VER_CHUNITHM_NEW: 54,
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f"{ChuniConstants.VER_CHUNITHM_NEW}_int": 49,
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ChuniConstants.VER_CHUNITHM_NEW_PLUS: 25,
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f"{ChuniConstants.VER_CHUNITHM_NEW_PLUS}_int": 31,
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ChuniConstants.VER_CHUNITHM_SUN: 70,
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f"{ChuniConstants.VER_CHUNITHM_SUN}_int": 35,
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ChuniConstants.VER_CHUNITHM_SUN_PLUS: 36,
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f"{ChuniConstants.VER_CHUNITHM_SUN_PLUS}_int": 36,
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ChuniConstants.VER_CHUNITHM_LUMINOUS: 8,
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f"{ChuniConstants.VER_CHUNITHM_LUMINOUS}_int": 8,
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}
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for version, keys in self.game_cfg.crypto.keys.items():
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if len(keys) < 3:
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continue
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if isinstance(version, int):
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version_idx = version
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else:
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version_idx = int(version.split("_")[0])
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salt = bytes.fromhex(keys[2])
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if len(keys) >= 4:
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iter_count = keys[3]
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elif (iter_count := known_iter_counts.get(version)) is None:
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self.logger.error(
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"Number of iteration rounds for version %s is not known, but it is not specified in the config",
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version,
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)
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continue
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self.hash_table[version] = {}
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method_list = [
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method
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for method in dir(self.versions[version_idx])
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if not method.startswith("__")
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]
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for method in method_list:
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method_fixed = inflection.camelize(method)[6:-7]
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# This only applies for CHUNITHM NEW International and later for some reason.
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# CHUNITHM SUPERSTAR (PLUS) did not add "Exp" to the endpoint when hashing.
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if (
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isinstance(version, str)
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and version.endswith("_int")
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and version_idx >= ChuniConstants.VER_CHUNITHM_NEW
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):
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method_fixed += "C3Exp"
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hash = PBKDF2(
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method_fixed,
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salt,
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128,
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count=iter_count,
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hmac_hash_module=SHA1,
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)
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hashed_name = hash.hex()[:32] # truncate unused bytes like the game does
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self.hash_table[version][hashed_name] = method_fixed
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self.logger.debug(
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f"Hashed v{version} method {method_fixed} with {salt} to get {hashed_name}"
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)
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@classmethod
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def is_game_enabled(
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cls, game_code: str, core_cfg: CoreConfig, cfg_dir: str
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) -> bool:
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game_cfg = ChuniConfig()
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if path.exists(f"{cfg_dir}/{ChuniConstants.CONFIG_NAME}"):
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game_cfg.update(
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yaml.safe_load(open(f"{cfg_dir}/{ChuniConstants.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_code: str, game_ver: int, keychip: str) -> Tuple[str, str]:
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if not self.core_cfg.server.is_using_proxy and Utils.get_title_port(self.core_cfg) != 80:
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return (f"http://{self.core_cfg.server.hostname}:{Utils.get_title_port(self.core_cfg)}/{game_code}/{game_ver}/", self.core_cfg.server.hostname)
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return (f"http://{self.core_cfg.server.hostname}/{game_code}/{game_ver}/", self.core_cfg.server.hostname)
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def get_routes(self) -> List[Route]:
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return [
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Route("/{game:str}/{version:int}/ChuniServlet/{endpoint:str}", self.render_POST, methods=['POST']),
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Route("/{game:str}/{version:int}/ChuniServlet/MatchingServer/{endpoint:str}", self.render_POST, methods=['POST']),
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]
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async def render_POST(self, request: Request) -> bytes:
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endpoint: str = request.path_params.get('endpoint')
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version: int = request.path_params.get('version')
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game_code: str = request.path_params.get('game')
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if endpoint.lower() == "ping":
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return Response(zlib.compress(b'{"returnCode": "1"}'))
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req_raw = await request.body()
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encrtped = False
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internal_ver = 0
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client_ip = Utils.get_ip_addr(request)
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if game_code == "SDHD" or game_code == "SDBT": # JP
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if version < 105: # 1.0
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internal_ver = ChuniConstants.VER_CHUNITHM
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elif version >= 105 and version < 110: # PLUS
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internal_ver = ChuniConstants.VER_CHUNITHM_PLUS
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elif version >= 110 and version < 115: # AIR
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internal_ver = ChuniConstants.VER_CHUNITHM_AIR
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elif version >= 115 and version < 120: # AIR PLUS
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internal_ver = ChuniConstants.VER_CHUNITHM_AIR_PLUS
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elif version >= 120 and version < 125: # STAR
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internal_ver = ChuniConstants.VER_CHUNITHM_STAR
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elif version >= 125 and version < 130: # STAR PLUS
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internal_ver = ChuniConstants.VER_CHUNITHM_STAR_PLUS
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elif version >= 130 and version < 135: # AMAZON
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internal_ver = ChuniConstants.VER_CHUNITHM_AMAZON
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elif version >= 135 and version < 140: # AMAZON PLUS
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internal_ver = ChuniConstants.VER_CHUNITHM_AMAZON_PLUS
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elif version >= 140 and version < 145: # CRYSTAL
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internal_ver = ChuniConstants.VER_CHUNITHM_CRYSTAL
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elif version >= 145 and version < 150: # CRYSTAL PLUS
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internal_ver = ChuniConstants.VER_CHUNITHM_CRYSTAL_PLUS
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elif version >= 150 and version < 200: # PARADISE
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internal_ver = ChuniConstants.VER_CHUNITHM_PARADISE
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elif version >= 200 and version < 205: # NEW!!
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internal_ver = ChuniConstants.VER_CHUNITHM_NEW
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elif version >= 205 and version < 210: # NEW PLUS!!
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internal_ver = ChuniConstants.VER_CHUNITHM_NEW_PLUS
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elif version >= 210 and version < 215: # SUN
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internal_ver = ChuniConstants.VER_CHUNITHM_SUN
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elif version >= 215 and version < 220: # SUN PLUS
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internal_ver = ChuniConstants.VER_CHUNITHM_SUN_PLUS
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elif version >= 220: # LUMINOUS
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internal_ver = ChuniConstants.VER_CHUNITHM_LUMINOUS
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elif game_code == "SDGS": # Int
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if version < 105: # SUPERSTAR
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internal_ver = ChuniConstants.VER_CHUNITHM_CRYSTAL_PLUS
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elif version >= 105 and version < 110: # SUPERSTAR PLUS *Cursed but needed due to different encryption key
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internal_ver = ChuniConstants.VER_CHUNITHM_PARADISE
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elif version >= 110 and version < 115: # NEW
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internal_ver = ChuniConstants.VER_CHUNITHM_NEW
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elif version >= 115 and version < 120: # NEW PLUS!!
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internal_ver = ChuniConstants.VER_CHUNITHM_NEW_PLUS
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elif version >= 120 and version < 125: # SUN
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internal_ver = ChuniConstants.VER_CHUNITHM_SUN
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elif version >= 125 and version < 130: # SUN PLUS
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internal_ver = ChuniConstants.VER_CHUNITHM_SUN_PLUS
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elif version >= 130: # LUMINOUS
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internal_ver = ChuniConstants.VER_CHUNITHM_LUMINOUS
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if all(c in string.hexdigits for c in endpoint) and len(endpoint) == 32:
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# If we get a 32 character long hex string, it's a hash and we're
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# doing encrypted. The likelihood of false positives is low but
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# technically not 0
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if game_code == "SDGS":
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crypto_cfg_key = f"{internal_ver}_int"
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hash_table_key = f"{internal_ver}_int"
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else:
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crypto_cfg_key = internal_ver
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hash_table_key = internal_ver
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if internal_ver < ChuniConstants.VER_CHUNITHM_NEW:
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endpoint = request.headers.get("User-Agent").split("#")[0]
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else:
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if hash_table_key not in self.hash_table:
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self.logger.error(
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f"v{version} does not support encryption or no keys entered"
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)
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return Response(zlib.compress(b'{"stat": "0"}'))
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elif endpoint.lower() not in self.hash_table[hash_table_key]:
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self.logger.error(
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f"No hash found for v{version} endpoint {endpoint}"
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)
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return Response(zlib.compress(b'{"stat": "0"}'))
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endpoint = self.hash_table[hash_table_key][endpoint.lower()]
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try:
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crypt = AES.new(
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bytes.fromhex(self.game_cfg.crypto.keys[crypto_cfg_key][0]),
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AES.MODE_CBC,
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bytes.fromhex(self.game_cfg.crypto.keys[crypto_cfg_key][1]),
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)
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req_raw = crypt.decrypt(req_raw)
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except Exception as e:
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self.logger.error(
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f"Failed to decrypt v{version} request to {endpoint} -> {e}"
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)
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return Response(zlib.compress(b'{"stat": "0"}'))
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encrtped = True
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if (
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not encrtped
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and self.game_cfg.crypto.encrypted_only
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and internal_ver >= ChuniConstants.VER_CHUNITHM_CRYSTAL_PLUS
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):
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self.logger.error(
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f"Unencrypted v{version} {endpoint} request, but config is set to encrypted only: {req_raw}"
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)
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return Response(zlib.compress(b'{"stat": "0"}'))
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try:
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unzip = zlib.decompress(req_raw)
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except zlib.error as e:
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self.logger.error(
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f"Failed to decompress v{version} {endpoint} request -> {e}"
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)
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return Response(zlib.compress(b'{"stat": "0"}'))
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req_data = json.loads(unzip)
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self.logger.info(f"v{version} {endpoint} request from {client_ip}")
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self.logger.debug(req_data)
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if game_code == "SDGS" and version >= 110:
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endpoint = endpoint.replace("C3Exp", "")
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elif game_code == "SDGS" and version < 110:
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endpoint = endpoint.replace("Exp", "")
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else:
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endpoint = endpoint
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func_to_find = "handle_" + inflection.underscore(endpoint) + "_request"
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handler_cls = self.versions[internal_ver](self.core_cfg, self.game_cfg)
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if not hasattr(handler_cls, func_to_find):
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self.logger.warning(f"Unhandled v{version} request {endpoint}")
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resp = {"returnCode": 1}
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else:
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try:
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handler = getattr(handler_cls, func_to_find)
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resp = await handler(req_data)
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except Exception as e:
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self.logger.error(f"Error handling v{version} method {endpoint} - {e}")
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return Response(zlib.compress(b'{"stat": "0"}'))
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if resp is None:
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resp = {"returnCode": 1}
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self.logger.debug(f"Response {resp}")
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zipped = zlib.compress(json.dumps(resp, ensure_ascii=False).encode("utf-8"))
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if not encrtped:
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return Response(zipped)
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padded = pad(zipped, 16)
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crypt = AES.new(
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bytes.fromhex(self.game_cfg.crypto.keys[crypto_cfg_key][0]),
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AES.MODE_CBC,
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bytes.fromhex(self.game_cfg.crypto.keys[crypto_cfg_key][1]),
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)
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return Response(crypt.encrypt(padded))
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