curl / libcurl / API / curl_easy_getinfo / CURLINFO_SSL_ENGINES

CURLINFO_SSL_ENGINES explained

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 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.