CURLOPT_PROXY_SSLVERSION(3) Library Functions Manual
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:
CURL_SSLVERSION_DEFAULT
The default action. This attempts to figure out the remote SSL
protocol version.
CURL_SSLVERSION_TLSv1
TLSv1.x
CURL_SSLVERSION_TLSv1_0
TLSv1.0
CURL_SSLVERSION_TLSv1_1
TLSv1.1
CURL_SSLVERSION_TLSv1_2
TLSv1.2
CURL_SSLVERSION_TLSv1_3
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.
CURL_SSLVERSION_MAX_DEFAULT
The flag defines the maximum supported TLS version as TLSv1.2,
or the default value from the SSL library. (Added in 7.54.0)
CURL_SSLVERSION_MAX_TLSv1_0
The flag defines maximum supported TLS version as TLSv1.0.
(Added in 7.54.0)
CURL_SSLVERSION_MAX_TLSv1_1
The flag defines maximum supported TLS version as TLSv1.1.
(Added in 7.54.0)
CURL_SSLVERSION_MAX_TLSv1_2
The flag defines maximum supported TLS version as TLSv1.2.
(Added in 7.54.0)
CURL_SSLVERSION_MAX_TLSv1_3
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
This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS,
POP3S, SMTPS etc.
All TLS backends support this option.
EXAMPLE
int main(void)
{
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 curl 7.52.0
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
if not.
SEE ALSO
CURLOPT_HTTP_VERSION(3), CURLOPT_IPRESOLVE(3), CURLOPT_SSLVERSION(3),
CURLOPT_USE_SSL(3)
libcurl 2024-08-05 CURLOPT_PROXY_SSLVERSION(3)
curl 8.9.1 - Generated Mon Aug 12 16:44:37 CDT 2024