Need bcrypt module

Raise code

    def _bcrypt_kdf(
        password: bytes,
        salt: bytes,
        desired_key_bytes: int,
        rounds: int,
        ignore_few_rounds: bool = False,
    ) -> bytes:
        raise UnsupportedAlgorithm("Need bcrypt module")


_SSH_ED25519 = b"ssh-ed25519"
_SSH_RSA = b"ssh-rsa"
_SSH_DSA = b"ssh-dss"
_ECDSA_NISTP256 = b"ecdsa-sha2-nistp256"
_ECDSA_NISTP384 = b"ecdsa-sha2-nistp384"