do_kex
do_kex("curve25519-sha256");
do_kex("ecdh-sha2-nistp256");
do_kex("ecdh-sha2-nistp384");
do_kex("ecdh-sha2-nistp521");
do_kex("diffie-hellman-group-exchange-sha256");
do_kex("diffie-hellman-group-exchange-sha1");
do_kex("diffie-hellman-group14-sha1");
do_kex("diffie-hellman-group14-sha256");
do_kex("diffie-hellman-group16-sha512");
do_kex("diffie-hellman-group18-sha512");
do_kex("diffie-hellman-group1-sha1");
do_kex("sntrup761x25519-sha512");
do_kex("mlkem768x25519-sha256");