CURLOPT_SSL_EC_CURVES - Man Page

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),

Referenced By

curl_easy_setopt(3).

September 08, 2021 libcurl 7.79.0 curl_easy_setopt options