NAME

       CURLINFO_SSL_ENGINES - get an slist of OpenSSL crypto-engines

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SSL_ENGINES,
                                  struct curl_slist **engine_list);

DESCRIPTION

       Pass  the  address  of a 'struct curl_slist *' to receive a linked-list of OpenSSL crypto-
       engines supported.  Note  that  engines  are  normally  implemented  in  separate  dynamic
       libraries.  Hence not all the returned engines may be available at runtime. NOTE: you must
       call curl_slist_free_all(3) on the list pointer once you are done with it, as libcurl does
       not free this data for you.

PROTOCOLS

       All TLS based ones.

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           struct curl_slist *engines;
           res = curl_easy_getinfo(curl, CURLINFO_SSL_ENGINES, &engines);
           if((res == CURLE_OK) && engines) {
             /* we have a list, free it when done using it */
             curl_slist_free_all(engines);
           }

           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in 7.12.3. Available in OpenSSL builds with "engine" support.

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       curl_easy_getinfo(3), curl_easy_setopt(3), CURLOPT_SSLENGINE(3)