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 *, pointing to a zero 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.

       You'll find more details about cipher lists on this URL:

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

       This  option  is  currently used only when curl is built to use OpenSSL 1.1.1 or later. If
       you are using a different SSL backend you can try setting TLS 1.3 cipher suites  by  using
       the CURLOPT_PROXY_SSL_CIPHER_LIST option.

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

DEFAULT

       NULL, use internal default

PROTOCOLS

       All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         curl_easy_setopt(curl, CURLOPT_PROXY_TLS13_CIPHERS,
                          "TLS13-CHACHA20-POLY1305-SHA256");
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY

       Added in 7.61.0.  Available when built with OpenSSL >= 1.1.1.

RETURN VALUE

       Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.

SEE ALSO

       CURLOPT_PROXY_SSL_CIPHER_LIST(3), CURLOPT_PROXY_SSLVERSION(3), CURLOPT_SSL_CIPHER_LIST(3),
       CURLOPT_TLS13_CIPHERS(3), CURLOPT_SSLVERSION(3),