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

curl_easy_getinfo(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).