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# coding: utf-8 # Modified Work: Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved. # This software is dual-licensed to you under the Universal Permissive License (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl or Apache License 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose either license. # Original Work: Copyright (c) 2015-2022 José Padilla import json from .algorithms import get_default_algorithms from .exceptions import InvalidKeyError, PyJWKError, PyJWKSetError class PyJWK: def __init__(self, jwk_data, algorithm=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}") self.Algorithm = self._algorithms.get(algorithm) if not self.Algorithm: raise PyJWKError(f"Unable to find a algorithm for key: {self._jwk_data}") self.key = self.Algorithm.from_jwk(self._jwk_data) @staticmethod def from_dict(obj, algorithm=None): return PyJWK(obj, algorithm) @staticmethod def from_json(data, algorithm=None): obj = json.loads(data) return PyJWK.from_dict(obj, algorithm) @property def key_type(self): return self._jwk_data.get("kty", None) @property def key_id(self): return self._jwk_data.get("kid", None) @property def public_key_use(self): return self._jwk_data.get("use", None) class PyJWKSet: def __init__(self, keys): self.keys = [] if not keys or not isinstance(keys, list): raise PyJWKSetError("Invalid JWK Set value") if len(keys) == 0: raise PyJWKSetError("The JWK Set did not contain any keys") for key in keys: self.keys.append(PyJWK(key)) @staticmethod def from_dict(obj): keys = obj.get("keys", []) return PyJWKSet(keys) @staticmethod def from_json(data): obj = json.loads(data) return PyJWKSet.from_dict(obj) def __getitem__(self, kid): for key in self.keys: if key.key_id == kid: return key raise KeyError(f"keyset has no key for kid: {kid}")
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