Section: curl_easy_setopt options (3)
Updated: June 25, 2020
CURLOPT_PROXY_TLS13_CIPHERS - ciphers suites for proxy TLS 1.3
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLS13_CIPHERS, char *list);
Pass a char *, 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.
You'll find more details about cipher lists on this URL:
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 option.
The application does not have to keep the string around after setting this
NULL, use internal default
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
ret = curl_easy_perform(curl);
Added in 7.61.0.
Available when built with OpenSSL >= 1.1.1.
Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.