CURLOPT_SSLENGINE_DEFAULT - make SSL engine default
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLENGINE_DEFAULT, long val);
Pass a long set to 1 to make the already specified crypto engine the default for
(asymmetric) crypto operations.
This option has no effect unless set after CURLOPT_SSLENGINE(3)
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_SSLENGINE, "dynamic");
curl_easy_setopt(curl, CURLOPT_SSLENGINE_DEFAULT, 1L);
ret = curl_easy_perform(curl);
Only if the SSL backend is OpenSSL built with engine support.
CURLE_OK - Engine set as default.
CURLE_SSL_ENGINE_SETFAILED - Engine could not be set as default.
CURLE_NOT_BUILT_IN - Option not built in, OpenSSL is not the SSL backend.
CURLE_UNKNOWN_OPTION - Option not recognized.
CURLE_OUT_OF_MEMORY - Insufficient heap space.