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CURLOPT_TLS13_CIPHERS(3)            libcurl           CURLOPT_TLS13_CIPHERS(3)




NAME

       CURLOPT_TLS13_CIPHERS - ciphers suites to use for TLS 1.3


SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TLS13_CIPHERS, char *list);


DESCRIPTION

       Pass a char *, pointing to a null-terminated string holding the list of
       cipher suites to use for the TLS 1.3 connection. 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, or Schannel. If you are using a different SSL backend
       you can try setting TLS 1.3 cipher suites by using the
       CURLOPT_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.


EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         curl_easy_setopt(curl, CURLOPT_TLS13_CIPHERS,
                          "TLS_CHACHA20_POLY1305_SHA256");
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }


AVAILABILITY

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

       Added in 7.85.0 for Schannel.


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_PROXY_TLS13_CIPHERS(3), CURLOPT_SSL_CIPHER_LIST(3),
       CURLOPT_SSLVERSION(3), CURLOPT_USE_SSL(3)

ibcurl 8.4.0                  September 26, 2023      CURLOPT_TLS13_CIPHERS(3)

curl 8.4.0 - Generated Sun Oct 22 15:10:10 CDT 2023
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