Scroll to navigation

CURLOPT_PROXY_SSLVERSION(3) curl_easy_setopt options CURLOPT_PROXY_SSLVERSION(3)

NAME

CURLOPT_PROXY_SSLVERSION - preferred HTTPS proxy TLS version

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLVERSION, long version);

DESCRIPTION

Pass a long as parameter to control which version of SSL/TLS to attempt to use when connecting to an HTTPS proxy.

Use one of the available defines for this purpose. The available options are:

The default action. This will attempt to figure out the remote SSL protocol version.
TLSv1.x
TLSv1.0
TLSv1.1
TLSv1.2
TLSv1.3
The maximum TLS version can be set by using one of the CURL_SSLVERSION_MAX_ macros below. It is also possible to OR one of the CURL_SSLVERSION_ macros with one of the CURL_SSLVERSION_MAX_ macros. The MAX macros are not supported for WolfSSL.
The flag defines the maximum supported TLS version as TLSv1.2, or the default value from the SSL library. (Added in 7.54.0)
The flag defines maximum supported TLS version as TLSv1.0. (Added in 7.54.0)
The flag defines maximum supported TLS version as TLSv1.1. (Added in 7.54.0)
The flag defines maximum supported TLS version as TLSv1.2. (Added in 7.54.0)
The flag defines maximum supported TLS version as TLSv1.3. (Added in 7.54.0)

In versions of curl prior to 7.54 the CURL_SSLVERSION_TLS options were documented to allow only the specified TLS version, but behavior was inconsistent depending on the TLS library.

DEFAULT

CURL_SSLVERSION_DEFAULT

PROTOCOLS

All

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

Added in 7.52.0

RETURN VALUE

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

CURLOPT_USE_SSL(3), CURLOPT_HTTP_VERSION(3), CURLOPT_IPRESOLVE(3) CURLOPT_SSLVERSION(3),

September 8, 2021 libcurl 7.79.1