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CURLOPT_TLS13_CIPHERS(3) curl_easy_setopt options CURLOPT_TLS13_CIPHERS(3)
CURLOPT_TLS13_CIPHERS - ciphers suites to use for TLS 1.3
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_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. The list must be
syntactically correct, it consists of one or more cipher suite strings
separated by colons.
you will 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 or Schannel. If you are using a different SSL backend
you can try setting TLS 1.3 cipher suites by using the
The application does not have to keep the string around after setting
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 for OpenSSL. Available when built with OpenSSL >=
Added in 7.85.0 for Schannel.
Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.
libcurl 7.87.0 September 22, 2022 CURLOPT_TLS13_CIPHERS(3)