krb5_free_key
extern void krb5_free_key(struct krb5_key_state *ks);
krb5_free_key(kc->kc_tokenkey);
krb5_free_key(kc->kc_encryptkey);
krb5_free_key(kc->kc_checksumkey);
krb5_free_key(kc->kc_send_seal_Ke);
krb5_free_key(kc->kc_send_seal_Ki);
krb5_free_key(kc->kc_send_seal_Kc);
krb5_free_key(kc->kc_send_sign_Kc);
krb5_free_key(kc->kc_recv_seal_Ke);
krb5_free_key(kc->kc_recv_seal_Ki);
krb5_free_key(kc->kc_recv_seal_Kc);
krb5_free_key(kc->kc_recv_sign_Kc);