CURLOPT_PROXY_SSLVERSION(3)curl_easy_setopt optionsCURLOPT_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 op-
tions 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_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_SSLVER-
SION_MAX_ macros below. It is also possible to OR one of the CURL_SS-
LVERSION_ 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
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) CUR-
LOPT_SSLVERSION(3),
libcurl 7.81.0 November 26, 2021 CURLOPT_PROXY_SSLVERSION(3)
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