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

       This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

       This option works only with the following TLS backends: OpenSSL

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 curl 7.12.3

RETURN VALUE

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

SEE ALSO

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