fix
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@@ -84,32 +84,52 @@ def ts_encrypt(input_value: Any, secret: str) -> str:
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return f"RSA{{{b64}}}"
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return f"RSA{{{b64}}}"
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def ts_encrypt(input_value: Any, secret: str) -> str:
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def ts_decrypt(input_value: Any, secret: str) -> Any:
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"""
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Compatible with JS TS_decrypt behavior:
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- If not string: return as-is.
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- If RSA{...}: decrypt AES(CryptoJS passphrase mode), parse JSON when possible.
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- If plain string JSON: parse JSON.
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- Else: return raw string.
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"""
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if not isinstance(input_value, str):
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if not isinstance(input_value, str):
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payload = json.dumps(input_value, separators=(",", ":"), ensure_ascii=False)
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return input_value
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else:
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payload = input_value
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payload_bytes = payload.encode("utf-8")
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is_wrapped = input_value.startswith("RSA{") and input_value.endswith("}")
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salt = os.urandom(8)
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if is_wrapped:
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if not secret:
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raise TeleSecCryptoError("Secret is required to decrypt RSA payload")
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b64 = input_value[4:-1]
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try:
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raw = base64.b64decode(b64)
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except Exception as exc:
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raise TeleSecCryptoError("Invalid base64 payload") from exc
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# OpenSSL EVP_BytesToKey (MD5)
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if len(raw) < 16 or not raw.startswith(b"Salted__"):
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dx = b""
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raise TeleSecCryptoError("Unsupported encrypted payload format")
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salted = b""
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while len(salted) < 48: # 32 key + 16 iv
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dx = hashlib.md5(dx + secret.encode() + salt).digest()
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salted += dx
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key = salted[:32]
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salt = raw[8:16]
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iv = salted[32:48]
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ciphertext = raw[16:]
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key, iv = _evp_bytes_to_key(secret.encode("utf-8"), salt, 32, 16)
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cipher = AES.new(key, AES.MODE_CBC, iv=iv)
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decrypted = cipher.decrypt(ciphertext)
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decrypted = _pkcs7_unpad(decrypted, 16)
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cipher = AES.new(key, AES.MODE_CBC, iv)
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try:
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encrypted = cipher.encrypt(_pkcs7_pad(payload_bytes, 16))
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text = decrypted.decode("utf-8")
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except UnicodeDecodeError:
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text = decrypted.decode("latin-1")
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openssl_blob = b"Salted__" + salt + encrypted
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try:
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b64 = base64.b64encode(openssl_blob).decode("utf-8")
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return json.loads(text)
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except Exception:
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return text
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return f"RSA{{{b64}}}"
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try:
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return json.loads(input_value)
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except Exception:
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return input_value
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@dataclass
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@dataclass
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class TeleSecDoc:
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class TeleSecDoc:
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