CURLINFO_SSL_ENGINES(3)    Library Functions Manual    CURLINFO_SSL_ENGINES(3)

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

libcurl                          April 26 2024         CURLINFO_SSL_ENGINES(3)