jwk.py 文件源码

def __init__(self, key, algorithm):
        if algorithm not in self.valid_hash_algs:
            raise JWKError('hash_alg: %s is not a valid hash algorithm' % algorithm)
        self.hash_alg = get_algorithm_object(algorithm)

        self.curve = self.curve_map.get(self.hash_alg)

        if isinstance(key, (ecdsa.SigningKey, ecdsa.VerifyingKey)):
            self.prepared_key = key
            return

        if isinstance(key, dict):
            self.prepared_key = self._process_jwk(key)
            return

        if isinstance(key, six.string_types):
            if isinstance(key, six.text_type):
                key = key.encode('utf-8')

            # Attempt to load key. We don't know if it's
            # a Signing Key or a Verifying Key, so we try
            # the Verifying Key first.
            try:
                key = ecdsa.VerifyingKey.from_pem(key)
            except ecdsa.der.UnexpectedDER:
                key = ecdsa.SigningKey.from_pem(key)
            except Exception as e:
                raise JWKError(e)

            self.prepared_key = key
            return

        raise JWKError('Unable to parse an ECKey from key: %s' % key)