CURLOPT_TLS13_CIPHERS(3) curl_easy_setopt options CURLOPT_TLS13_CIPHERS(3)
NAME
CURLOPT_TLS13_CIPHERS - ciphers suites to use for TLS 1.3
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TLS13_CIPHERS, char *list);
DESCRIPTION
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 syn-
tactically correct, it consists of one or more cipher suite strings
separated by colons.
you will find more details about cipher lists on this URL:
https://curl.se/docs/ssl-ciphers.html
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_SSL_CIPHER_LIST op-
tion.
The application does not have to keep the string around after setting
this option.
DEFAULT
NULL, use internal default
PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_TLS13_CIPHERS,
"TLS13-CHACHA20-POLY1305-SHA256");
ret = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
AVAILABILITY
Added in 7.61.0. Available when built with OpenSSL >= 1.1.1.
RETURN VALUE
Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.
SEE ALSO
CURLOPT_SSL_CIPHER_LIST(3), CURLOPT_SSLVERSION(3), CUR-
LOPT_PROXY_SSL_CIPHER_LIST(3), CURLOPT_PROXY_TLS13_CIPHERS(3), CUR-
LOPT_PROXY_SSLVERSION(3), CURLOPT_USE_SSL(3),
libcurl 7.81.0 November 26, 2021 CURLOPT_TLS13_CIPHERS(3)
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