curl/docs/libcurl/opts/CURLOPT_PROXY_TLS13_CIPHERS.md

c	SPDX-License-Identifier	Title	Section	Source	See-also	Protocol	TLS-backend	Added-in
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	CURLOPT_PROXY_TLS13_CIPHERS	3	libcurl	CURLOPT_PROXY_SSLVERSION (3) CURLOPT_PROXY_SSL_CIPHER_LIST (3) CURLOPT_SSLVERSION (3) CURLOPT_SSL_CIPHER_LIST (3) CURLOPT_TLS13_CIPHERS (3)	TLS	OpenSSL Schannel wolfSSL mbedTLS rustls	7.61.0

NAME

CURLOPT_PROXY_TLS13_CIPHERS - ciphers suites for proxy TLS 1.3

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLS13_CIPHERS,
                          char *list);

DESCRIPTION

Pass a char pointer, pointing to a null-terminated string holding the list of cipher suites to use for the TLS 1.3 connection to a proxy. The list must be syntactically correct, it consists of one or more cipher suite strings separated by colons.

For setting TLS 1.2 (1.1, 1.0) ciphers see CURLOPT_PROXY_SSL_CIPHER_LIST(3).

A valid example of a cipher list is:

"TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256"

Find more details about cipher lists on this URL:

https://curl.se/docs/ssl-ciphers.html

The application does not have to keep the string around after setting this option.

DEFAULT

NULL, use internal built-in list

%PROTOCOLS%

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_PROXY_TLS13_CIPHERS,
                     "TLS_CHACHA20_POLY1305_SHA256");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

HISTORY

OpenSSL support added in 7.61.0, available when built with OpenSSL >= 1.1.1. Schannel support added in 7.87.0. LibreSSL support added in 8.3.0, available when built with LibreSSL >= 3.4.1. wolfSSL support added in 8.10.0. mbedTLS support added in 8.10.0, available when built with mbedTLS >= 3.6.0. rustls support added in 8.10.0.

Before curl 8.10.0 with mbedTLS or wolfSSL, TLS 1.3 cipher suites where set by using the CURLOPT_PROXY_SSL_CIPHER_LIST(3) option.

%AVAILABILITY%

RETURN VALUE

Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.