krb5_get_checksum_key
krb5_get_checksum_key(struct krb5_key_state *basekey, int usage);
kc->kc_checksumkey = krb5_get_checksum_key(key, KG_USAGE_SIGN);
kc->kc_send_seal_Kc = krb5_get_checksum_key(key,
kc->kc_send_sign_Kc = krb5_get_checksum_key(key,
kc->kc_recv_seal_Kc = krb5_get_checksum_key(key,
kc->kc_recv_sign_Kc = krb5_get_checksum_key(key,
kc->kc_send_seal_Kc = krb5_get_checksum_key(key,
kc->kc_send_sign_Kc = krb5_get_checksum_key(key,
kc->kc_recv_seal_Kc = krb5_get_checksum_key(key,
kc->kc_recv_sign_Kc = krb5_get_checksum_key(key,