CURLOPT_TLS13_CIPHERS - ciphers suites to use for TLS 1.3
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TLS13_CIPHERS, char *list);
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
option.
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.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | web/curl |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
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),
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://curl.se/down-
load/curl-7.83.1.tar.bz2.
Further information about this software can be found on the open source
community website at http://curl.haxx.se/.
libcurl 7.83.1 November 26, 2021 CURLOPT_TLS13_CIPHERS(3)