NAME

       CURLOPT_SSL_EC_CURVES - key exchange curves

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_EC_CURVES, char *alg_list);

DESCRIPTION

       Pass  a  string  as  parameter  with  a  colon delimited list of (EC) algorithms. This option defines the
       client's key exchange algorithms in the SSL handshake (if  the  SSL  backend  libcurl  is  built  to  use
       supports it).

DEFAULT

       "", embedded in SSL backend

PROTOCOLS

       HTTP

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_SSL_EC_CURVES, "X25519:P-521");
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in 7.73.0. Supported by the OpenSSL backend.

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_SSL_OPTIONS(3), CURLOPT_SSL_CIPHER_LIST(3), CURLOPT_TLS13_CIPHERS(3)

ibcurl 8.5.0                                    December 04, 2023                       CURLOPT_SSL_EC_CURVES(3)