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.

       Find more details about cipher lists on this URL:

        https://curl.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(3) option.

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

DEFAULT

       NULL, use internal built-in list

PROTOCOLS

       This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

       This option works only with the following TLS backends: OpenSSL and Schannel

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);
         }
       }

AVAILABILITY

       Added in curl 7.61.0

RETURN VALUE

       Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.

SEE ALSO

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