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CURLOPT_SSL_EC_CURVES(3)            libcurl           CURLOPT_SSL_EC_CURVES(3)


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

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         curl_easy_setopt(curl, CURLOPT_SSL_EC_CURVES, "X25519:P-521");
         ret = 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 8.1.2                    April 26, 2023        CURLOPT_SSL_EC_CURVES(3)

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