CURLOPT_SSLVERSION(3) curl_easy_setopt options CURLOPT_SSLVERSION(3)NAMECURLOPT_SSLVERSION - set preferred TLS/SSL version
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLVERSION, long ver‐
sion);
DESCRIPTION
Pass a long as parameter to control which version of SSL/TLS to attempt
to use.
Use one of the available defines for this purpose. The available
options are:
CURL_SSLVERSION_DEFAULT
The default action. This will attempt to figure out the
remote SSL protocol version.
CURL_SSLVERSION_TLSv1
TLSv1.x
CURL_SSLVERSION_SSLv2
SSLv2
CURL_SSLVERSION_SSLv3
SSLv3
CURL_SSLVERSION_TLSv1_0
TLSv1.0 (Added in 7.34.0)
CURL_SSLVERSION_TLSv1_1
TLSv1.1 (Added in 7.34.0)
CURL_SSLVERSION_TLSv1_2
TLSv1.2 (Added in 7.34.0)
DEFAULT
CURL_SSLVERSION_DEFAULT
PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* ask libcurl to use TLS version 1.0 or later */
curl_easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
/* Perform the request */
curl_easy_perform(curl);
}
AVAILABILITY
SSLv2 is disabled by default since 7.18.1. Other SSL versions avail‐
ability may vary depending on which backend libcurl has been built to
use.
SSLv3 is disabled by default since 7.39.0.
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
if not.
SEE ALSOCURLOPT_USE_SSL(3), CURLOPT_HTTP_VERSION(3), CURLOPT_IPRESOLVE(3)libcurl 7.37.0 17 Jun 2014 CURLOPT_SSLVERSION(3)