support SDGS encryption
This commit is contained in:
parent
c3efc36be2
commit
bf8631448a
|
|
@ -39,7 +39,7 @@ class ChuniServlet(BaseServlet):
|
|||
def __init__(self, core_cfg: CoreConfig, cfg_dir: str) -> None:
|
||||
super().__init__(core_cfg, cfg_dir)
|
||||
self.game_cfg = ChuniConfig()
|
||||
self.hash_table: Dict[Dict[str, str]] = {}
|
||||
self.hash_table: Dict[str, Dict[str, str]] = {}
|
||||
if path.exists(f"{cfg_dir}/{ChuniConstants.CONFIG_NAME}"):
|
||||
self.game_cfg.update(
|
||||
yaml.safe_load(open(f"{cfg_dir}/{ChuniConstants.CONFIG_NAME}"))
|
||||
|
|
@ -89,45 +89,59 @@ class ChuniServlet(BaseServlet):
|
|||
)
|
||||
self.logger.inited = True
|
||||
|
||||
known_iter_counts = {
|
||||
ChuniConstants.VER_CHUNITHM_CRYSTAL_PLUS: 67,
|
||||
ChuniConstants.VER_CHUNITHM_PARADISE: 44,
|
||||
f"{ChuniConstants.VER_CHUNITHM_PARADISE}_int": 25,
|
||||
ChuniConstants.VER_CHUNITHM_NEW: 54,
|
||||
f"{ChuniConstants.VER_CHUNITHM_NEW}_int": 49,
|
||||
ChuniConstants.VER_CHUNITHM_NEW_PLUS: 25,
|
||||
ChuniConstants.VER_CHUNITHM_SUN: 70,
|
||||
ChuniConstants.VER_CHUNITHM_SUN_PLUS: 36,
|
||||
}
|
||||
|
||||
for version, keys in self.game_cfg.crypto.keys.items():
|
||||
if len(keys) < 3:
|
||||
continue
|
||||
|
||||
self.hash_table[version] = {}
|
||||
if isinstance(version, int):
|
||||
version_idx = version
|
||||
else:
|
||||
version_idx = int(version.split("_")[0])
|
||||
|
||||
salt = bytes.fromhex(keys[2])
|
||||
|
||||
if len(keys) >= 4:
|
||||
iter_count = keys[3]
|
||||
elif (iter_count := known_iter_counts.get(version)) is None:
|
||||
self.logger.error(
|
||||
"Number of iteration rounds for version %s is not known, but it is not specified in the config",
|
||||
version,
|
||||
)
|
||||
continue
|
||||
|
||||
self.hash_table[version] = {}
|
||||
method_list = [
|
||||
method
|
||||
for method in dir(self.versions[version])
|
||||
for method in dir(self.versions[version_idx])
|
||||
if not method.startswith("__")
|
||||
]
|
||||
|
||||
for method in method_list:
|
||||
method_fixed = inflection.camelize(method)[6:-7]
|
||||
# number of iterations was changed to 70 in SUN and then to 36
|
||||
if version == ChuniConstants.VER_CHUNITHM_SUN_PLUS:
|
||||
iter_count = 36
|
||||
elif version == ChuniConstants.VER_CHUNITHM_SUN:
|
||||
iter_count = 70
|
||||
elif version == ChuniConstants.VER_CHUNITHM_NEW_PLUS:
|
||||
iter_count = 25
|
||||
elif version == ChuniConstants.VER_CHUNITHM_NEW:
|
||||
iter_count = 54
|
||||
elif version == ChuniConstants.VER_CHUNITHM_PARADISE:
|
||||
iter_count = 44
|
||||
elif version == ChuniConstants.VER_CHUNITHM_CRYSTAL_PLUS:
|
||||
iter_count = 67
|
||||
else:
|
||||
disp_version = (
|
||||
ChuniConstants.VERSION_NAMES[version]
|
||||
if version in ChuniConstants.VERSION_NAMES
|
||||
else str(version)
|
||||
)
|
||||
|
||||
self.logger.warning("Version %s does not support encryption", disp_version)
|
||||
continue
|
||||
|
||||
# This only applies for CHUNITHM NEW International and later for some reason.
|
||||
# CHUNITHM SUPERSTAR (PLUS) did not add "Exp" to the endpoint when hashing.
|
||||
if (
|
||||
isinstance(version, str)
|
||||
and version.endswith("_int")
|
||||
and version_idx >= ChuniConstants.VER_CHUNITHM_NEW
|
||||
):
|
||||
method_fixed += "C3Exp"
|
||||
|
||||
hash = PBKDF2(
|
||||
method_fixed,
|
||||
bytes.fromhex(keys[2]),
|
||||
salt,
|
||||
128,
|
||||
count=iter_count,
|
||||
hmac_hash_module=SHA1,
|
||||
|
|
@ -137,7 +151,7 @@ class ChuniServlet(BaseServlet):
|
|||
self.hash_table[version][hashed_name] = method_fixed
|
||||
|
||||
self.logger.debug(
|
||||
f"Hashed v{version} method {method_fixed} with {bytes.fromhex(keys[2])} to get {hash.hex()}"
|
||||
f"Hashed v{version} method {method_fixed} with {salt} to get {hashed_name}"
|
||||
)
|
||||
|
||||
@classmethod
|
||||
|
|
@ -226,31 +240,39 @@ class ChuniServlet(BaseServlet):
|
|||
|
||||
if all(c in string.hexdigits for c in endpoint) and len(endpoint) == 32:
|
||||
# If we get a 32 character long hex string, it's a hash and we're
|
||||
# doing encrypted. The likelyhood of false positives is low but
|
||||
# doing encrypted. The likelihood of false positives is low but
|
||||
# technically not 0
|
||||
|
||||
if game_code == "SDGS":
|
||||
crypto_cfg_key = f"{internal_ver}_int"
|
||||
hash_table_key = f"{internal_ver}_int"
|
||||
else:
|
||||
crypto_cfg_key = internal_ver
|
||||
hash_table_key = internal_ver
|
||||
|
||||
if internal_ver < ChuniConstants.VER_CHUNITHM_NEW:
|
||||
endpoint = request.headers.get("User-Agent").split("#")[0]
|
||||
|
||||
else:
|
||||
if internal_ver not in self.hash_table:
|
||||
if hash_table_key not in self.hash_table:
|
||||
self.logger.error(
|
||||
f"v{version} does not support encryption or no keys entered"
|
||||
)
|
||||
return Response(zlib.compress(b'{"stat": "0"}'))
|
||||
|
||||
elif endpoint.lower() not in self.hash_table[internal_ver]:
|
||||
elif endpoint.lower() not in self.hash_table[hash_table_key]:
|
||||
self.logger.error(
|
||||
f"No hash found for v{version} endpoint {endpoint}"
|
||||
)
|
||||
return Response(zlib.compress(b'{"stat": "0"}'))
|
||||
|
||||
endpoint = self.hash_table[internal_ver][endpoint.lower()]
|
||||
endpoint = self.hash_table[hash_table_key][endpoint.lower()]
|
||||
|
||||
try:
|
||||
crypt = AES.new(
|
||||
bytes.fromhex(self.game_cfg.crypto.keys[internal_ver][0]),
|
||||
bytes.fromhex(self.game_cfg.crypto.keys[crypto_cfg_key][0]),
|
||||
AES.MODE_CBC,
|
||||
bytes.fromhex(self.game_cfg.crypto.keys[internal_ver][1]),
|
||||
bytes.fromhex(self.game_cfg.crypto.keys[crypto_cfg_key][1]),
|
||||
)
|
||||
|
||||
req_raw = crypt.decrypt(req_raw)
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user