Method compute_derived_key

authlib/jose/rfc7518/jwe_algs.py:241–248

(self, shared_key, fixed_info, bit_size)

        return alg_id + apu_info + apv_info + pub_info

    def compute_derived_key(self, shared_key, fixed_info, bit_size):
        ckdf = ConcatKDFHash(
            algorithm=hashes.SHA256(),
            length=bit_size // 8,
            otherinfo=fixed_info,
            backend=default_backend(),
        )
        return ckdf.derive(shared_key)

    def deliver(self, key, pubkey, headers, bit_size):
        shared_key = key.exchange_shared_key(pubkey)