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Merge branch 'beerpsi-fix/chuni/correct-iter-counts' into develop (#151)

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This commit is contained in:
Hay1tsme 2024-06-28 13:10:14 -04:00
commit fef527d61f
3 changed files with 66 additions and 21 deletions
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3
changelog.md
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@ -6,6 +6,9 @@ Documenting updates to ARTEMiS, to be updated every time the master branch is pu
+ CHUNITHM LUMINOUS support
## 20240616
### CHUNITHM
+ Support network encryption for Export/International versions
### DIVA
+ Working frontend with name and level strings edit and playlog

8
docs/game_specific_info.md
View File

@ -88,13 +88,19 @@ Config file is located in `config/chuni.yaml`.
| `crypto` | This option is used to enable the TLS Encryption |
**If you would like to use network encryption, the following will be required underneath but key, iv and hash are required:**
If you would like to use network encryption, add the keys to the `keys` section under `crypto`, where the key
is the version ID for Japanese (SDHD) versions and `"{versionID}_int"` for Export (SDGS) versions, and the value
is an array containing `[key, iv, salt, iter_count]` in order.
`iter_count` is optional for all Japanese (SDHD) versions but may be required for some Export (SDGS) versions.
You will receive an error in the logs if it needs to be specified.
```yaml
crypto:
encrypted_only: False
keys:
13: ["0000000000000000000000000000000000000000000000000000000000000000", "00000000000000000000000000000000", "0000000000000000"]
"13_int": ["0000000000000000000000000000000000000000000000000000000000000000", "00000000000000000000000000000000", "0000000000000000", 42]
```
### Database upgrade

76
titles/chuni/index.py
View File

@ -41,7 +41,7 @@ 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}"))
@ -92,32 +92,60 @@ 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,
ChuniConstants.VER_CHUNITHM_LUMINOUS: 8,
}
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_LUMINOUS:
iter_count = 8
elif version == ChuniConstants.VER_CHUNITHM_SUN_PLUS:
iter_count = 36
elif version == ChuniConstants.VER_CHUNITHM_SUN:
iter_count = 70
else:
iter_count = 44
# 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,
@ -127,7 +155,7 @@ 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
@ -220,31 +248,39 @@ 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)