DragonFly On-Line Manual Pages
CURLOPT_SSLENGINE(3) curl_easy_setopt options CURLOPT_SSLENGINE(3)
CURLOPT_SSLENGINE - set SSL engine identifier
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLENGINE, char *id);
Pass a pointer to a null-terminated string as parameter. It will be
used as the identifier for the crypto engine you want to use for your
The application does not have to keep the string around after setting
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");
ret = curl_easy_perform(curl);
Only if the SSL backend is OpenSSL built with engine support.
CURLE_OK - Engine found.
CURLE_SSL_ENGINE_NOTFOUND - Engine not found, or OpenSSL was not built
with engine support.
CURLE_SSL_ENGINE_INITFAILED - Engine found but initialization failed.
CURLE_NOT_BUILT_IN - Option not built in, OpenSSL is not the SSL
CURLE_UNKNOWN_OPTION - Option not recognized.
CURLE_OUT_OF_MEMORY - Insufficient heap space.
libcurl 7.76.0 November 4, 2020 CURLOPT_SSLENGINE(3)