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from authlib.common.encoding import json_dumps
class KeySet:
"""This class represents a JSON Web Key Set."""
def __init__(self, keys):
self.keys = keys
def as_dict(self, is_private=False, **params):
"""Represent this key as a dict of the JSON Web Key Set."""
return {"keys": [k.as_dict(is_private, **params) for k in self.keys]}
def as_json(self, is_private=False, **params):
"""Represent this key set as a JSON string."""
obj = self.as_dict(is_private, **params)
return json_dumps(obj)
def find_by_kid(self, kid, **params):
"""Find the key matches the given kid value.
:param kid: A string of kid
:return: Key instance
:raise: ValueError
"""
# Proposed fix, feel free to do something else but the idea is that we take the only key
# of the set if no kid is specified
if kid is None and len(self.keys) == 1:
return self.keys[0]
keys = [key for key in self.keys if key.kid == kid]
if params:
keys = list(_filter_keys_by_params(keys, **params))
if len(keys) == 1:
return keys[0]
raise ValueError("Invalid JSON Web Key Set")
def _filter_keys_by_params(keys, **params):
_use = params.get("use")
_alg = params.get("alg")
for key in keys:
designed_use = key.tokens.get("use")
if designed_use and _use and designed_use != _use:
continue
designed_alg = key.tokens.get("alg")
if designed_alg and _alg and designed_alg != _alg:
continue
yield key
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