chore: 添加虚拟环境到仓库

- 添加 backend_service/venv 虚拟环境
- 包含所有Python依赖包
- 注意：虚拟环境约393MB，包含12655个文件

backend_service/venv/lib/python3.13/site-packages/jwt/api_jwk.py

@@ -0,0 +1,144 @@
+from __future__ import annotations
+
+import json
+import time
+from typing import Any
+
+from .algorithms import get_default_algorithms, has_crypto, requires_cryptography
+from .exceptions import (
+    InvalidKeyError,
+    MissingCryptographyError,
+    PyJWKError,
+    PyJWKSetError,
+    PyJWTError,
+)
+from .types import JWKDict
+
+
+class PyJWK:
+    def __init__(self, jwk_data: JWKDict, algorithm: str | None = None) -> None:
+        self._algorithms = get_default_algorithms()
+        self._jwk_data = jwk_data
+
+        kty = self._jwk_data.get("kty", None)
+        if not kty:
+            raise InvalidKeyError(f"kty is not found: {self._jwk_data}")
+
+        if not algorithm and isinstance(self._jwk_data, dict):
+            algorithm = self._jwk_data.get("alg", None)
+
+        if not algorithm:
+            # Determine alg with kty (and crv).
+            crv = self._jwk_data.get("crv", None)
+            if kty == "EC":
+                if crv == "P-256" or not crv:
+                    algorithm = "ES256"
+                elif crv == "P-384":
+                    algorithm = "ES384"
+                elif crv == "P-521":
+                    algorithm = "ES512"
+                elif crv == "secp256k1":
+                    algorithm = "ES256K"
+                else:
+                    raise InvalidKeyError(f"Unsupported crv: {crv}")
+            elif kty == "RSA":
+                algorithm = "RS256"
+            elif kty == "oct":
+                algorithm = "HS256"
+            elif kty == "OKP":
+                if not crv:
+                    raise InvalidKeyError(f"crv is not found: {self._jwk_data}")
+                if crv == "Ed25519":
+                    algorithm = "EdDSA"
+                else:
+                    raise InvalidKeyError(f"Unsupported crv: {crv}")
+            else:
+                raise InvalidKeyError(f"Unsupported kty: {kty}")
+
+        if not has_crypto and algorithm in requires_cryptography:
+            raise MissingCryptographyError(
+                f"{algorithm} requires 'cryptography' to be installed."
+            )
+
+        self.algorithm_name = algorithm
+
+        if algorithm in self._algorithms:
+            self.Algorithm = self._algorithms[algorithm]
+        else:
+            raise PyJWKError(f"Unable to find an algorithm for key: {self._jwk_data}")
+
+        self.key = self.Algorithm.from_jwk(self._jwk_data)
+
+    @staticmethod
+    def from_dict(obj: JWKDict, algorithm: str | None = None) -> PyJWK:
+        return PyJWK(obj, algorithm)
+
+    @staticmethod
+    def from_json(data: str, algorithm: None = None) -> PyJWK:
+        obj = json.loads(data)
+        return PyJWK.from_dict(obj, algorithm)
+
+    @property
+    def key_type(self) -> str | None:
+        return self._jwk_data.get("kty", None)
+
+    @property
+    def key_id(self) -> str | None:
+        return self._jwk_data.get("kid", None)
+
+    @property
+    def public_key_use(self) -> str | None:
+        return self._jwk_data.get("use", None)
+
+
+class PyJWKSet:
+    def __init__(self, keys: list[JWKDict]) -> None:
+        self.keys = []
+
+        if not keys:
+            raise PyJWKSetError("The JWK Set did not contain any keys")
+
+        if not isinstance(keys, list):
+            raise PyJWKSetError("Invalid JWK Set value")
+
+        for key in keys:
+            try:
+                self.keys.append(PyJWK(key))
+            except PyJWTError as error:
+                if isinstance(error, MissingCryptographyError):
+                    raise error
+                # skip unusable keys
+                continue
+
+        if len(self.keys) == 0:
+            raise PyJWKSetError(
+                "The JWK Set did not contain any usable keys. Perhaps 'cryptography' is not installed?"
+            )
+
+    @staticmethod
+    def from_dict(obj: dict[str, Any]) -> PyJWKSet:
+        keys = obj.get("keys", [])
+        return PyJWKSet(keys)
+
+    @staticmethod
+    def from_json(data: str) -> PyJWKSet:
+        obj = json.loads(data)
+        return PyJWKSet.from_dict(obj)
+
+    def __getitem__(self, kid: str) -> PyJWK:
+        for key in self.keys:
+            if key.key_id == kid:
+                return key
+        raise KeyError(f"keyset has no key for kid: {kid}")
+
+
+class PyJWTSetWithTimestamp:
+    def __init__(self, jwk_set: PyJWKSet):
+        self.jwk_set = jwk_set
+        self.timestamp = time.monotonic()
+
+    def get_jwk_set(self) -> PyJWKSet:
+        return self.jwk_set
+
+    def get_timestamp(self) -> float:
+        return self.timestamp