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Edit File : jwks_client.py \| Size : 1.88 KB
import json import urllib.request from functools import lru_cache from typing import Any, List from .api_jwk import PyJWK, PyJWKSet from .api_jwt import decode_complete as decode_token from .exceptions import PyJWKClientError class PyJWKClient: def __init__(self, uri: str, cache_keys: bool = True, max_cached_keys: int = 16): self.uri = uri if cache_keys: # Cache signing keys # Ignore mypy (https://github.com/python/mypy/issues/2427) self.get_signing_key = lru_cache(maxsize=max_cached_keys)(self.get_signing_key) # type: ignore def fetch_data(self) -> Any: with urllib.request.urlopen(self.uri) as response: return json.load(response) def get_jwk_set(self) -> PyJWKSet: data = self.fetch_data() return PyJWKSet.from_dict(data) def get_signing_keys(self) -> List[PyJWK]: jwk_set = self.get_jwk_set() signing_keys = [] for jwk_set_key in jwk_set.keys: if jwk_set_key.public_key_use == "sig" and jwk_set_key.key_id: signing_keys.append(jwk_set_key) if len(signing_keys) == 0: raise PyJWKClientError("The JWKS endpoint did not contain any signing keys") return signing_keys def get_signing_key(self, kid: str) -> PyJWK: signing_keys = self.get_signing_keys() signing_key = None for key in signing_keys: if key.key_id == kid: signing_key = key break if not signing_key: raise PyJWKClientError( f'Unable to find a signing key that matches: "{kid}"' ) return signing_key def get_signing_key_from_jwt(self, token: str) -> PyJWK: unverified = decode_token(token, options={"verify_signature": False}) header = unverified["header"] return self.get_signing_key(header.get("kid")) Back

Edit File : jwks_client.py | Size : 1.88 KB

import json
import urllib.request
from functools import lru_cache
from typing import Any, List

from .api_jwk import PyJWK, PyJWKSet
from .api_jwt import decode_complete as decode_token
from .exceptions import PyJWKClientError

class PyJWKClient:
    def __init__(self, uri: str, cache_keys: bool = True, max_cached_keys: int = 16):
        self.uri = uri
        if cache_keys:
            # Cache signing keys
            # Ignore mypy (https://github.com/python/mypy/issues/2427)
            self.get_signing_key = lru_cache(maxsize=max_cached_keys)(self.get_signing_key)  # type: ignore

def fetch_data(self) -> Any:
        with urllib.request.urlopen(self.uri) as response:
            return json.load(response)

def get_jwk_set(self) -> PyJWKSet:
        data = self.fetch_data()
        return PyJWKSet.from_dict(data)

def get_signing_keys(self) -> List[PyJWK]:
        jwk_set = self.get_jwk_set()
        signing_keys = []

for jwk_set_key in jwk_set.keys:
            if jwk_set_key.public_key_use == "sig" and jwk_set_key.key_id:
                signing_keys.append(jwk_set_key)

if len(signing_keys) == 0:
            raise PyJWKClientError("The JWKS endpoint did not contain any signing keys")

return signing_keys

def get_signing_key(self, kid: str) -> PyJWK:
        signing_keys = self.get_signing_keys()
        signing_key = None

for key in signing_keys:
            if key.key_id == kid:
                signing_key = key
                break

if not signing_key:
            raise PyJWKClientError(
                f'Unable to find a signing key that matches: "{kid}"'
            )

return signing_key

def get_signing_key_from_jwt(self, token: str) -> PyJWK:
        unverified = decode_token(token, options={"verify_signature": False})
        header = unverified["header"]
        return self.get_signing_key(header.get("kid"))

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