SilcAsyncOperation silc_skr_find(SilcSKR skr, SilcSchedule schedule,
                                     SilcSKRFind find,
                                     SilcSKRFindCallback callback,
                                     void *callback_context);

    Finds key(s) from key repository `skr' by the search constraints
    `find'.  As the finding procedure may be asynchronous this returns
    SilcAsyncOperation that may be used to control (like abort) the
    operation.  The `callback' with `callback_context' will be called
    to return found keys.  If this returns NULL the finding was not
    asynchronous, and the `callback' has been called already.

   SilcSKRFind find;

   // Find all SILC public keys originating from Finland
   find = silc_skr_find_alloc();
   silc_skr_find_set_pkcs_type(find, SILC_PKCS_SILC);
   silc_skr_find_set_country(find, "FI");

   // Find
   silc_skr_find(skr, schedule, find, find_callback, cb_context);