CURLOPT_PROXY_TLS13_CIPHERS(3)                        Library Functions Manual

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 default

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

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

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

libcurl                          April 26 2024  CURLOPT_PROXY_TLS13_CIPHERS(3)