SilcDList
    silc_client_list_channel_private_keys(SilcClient client,
                                          SilcClientConnection conn,
                                          SilcChannelEntry channel);

    Returns list of private keys associated to the `channel'.  The caller
    must free the returned list with silc_dlist_uninit.  The pointers in
    the list may be used to delete the specific key by giving the pointer
    as argument to the function silc_client_del_channel_private_key.  Each
    entry in the list is SilcChannelPrivateKey.