CURLOPT_PROXY_SSLVERSION
Section: curl_easy_setopt options (3)
Updated: November 04, 2020
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NAME
CURLOPT_PROXY_SSLVERSION - set preferred proxy TLS/SSL 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 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_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
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),