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CURLOPT_SSLENGINE_DEFAULT(3) Library Functions Manual CURLOPT_SSLENGINE_DEFAULT(3)

NAME

CURLOPT_SSLENGINE_DEFAULT - make SSL engine default

SYNOPSIS


#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLENGINE_DEFAULT, long val);

DESCRIPTION

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).

DEFAULT

None

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;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_SSLENGINE, "dynamic");
curl_easy_setopt(curl, CURLOPT_SSLENGINE_DEFAULT, 1L);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}

AVAILABILITY

Added in curl 7.9.3

RETURN VALUE

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.

SEE ALSO

CURLOPT_SSLCERT(3), CURLOPT_SSLENGINE(3)
2025-05-14 libcurl
Copyright 2011-2025 Jonas 'Sortie' Termansen and contributors.
Sortix's source code is free software under the ISC license.
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