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CURLOPT_P...13_CIPHERS(3)  Library Functions Manual  CURLOPT_P...13_CIPHERS(3)

NAME
       CURLOPT_PROXY_TLS13_CIPHERS - ciphers suites for	proxy TLS 1.3

SYNOPSIS
       #include	<curl/curl.h>

       CURLcode	curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLS13_CIPHERS,
				 char *list);

DESCRIPTION
       Pass  a	char pointer, 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.

       For  setting  TLS  1.2  (1.1,  1.0)  ciphers  see CURLOPT_PROXY_SSL_CI-
       PHER_LIST(3).

       A valid example of a cipher list	is:
       "TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256"

       Find more details about cipher lists on this URL:

	https://curl.se/docs/ssl-ciphers.html

       The application does not	have to	keep the string	around	after  setting
       this option.

       Using this option multiple times	makes the last set string override the
       previous	ones. Set it to	NULL to	disable	its use	again.

DEFAULT
       NULL, use internal built-in list

PROTOCOLS
       This functionality affects all TLS based	protocols: HTTPS, FTPS,	IMAPS,
       POP3S, SMTPS etc.

       This  option  works  only  with	the  following	TLS backends: OpenSSL,
       mbedTLS,	rustls and wolfSSL

EXAMPLE
       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   CURLcode res;
	   curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
	   curl_easy_setopt(curl, CURLOPT_PROXY_TLS13_CIPHERS,
			    "TLS_CHACHA20_POLY1305_SHA256");
	   res = curl_easy_perform(curl);
	   curl_easy_cleanup(curl);
	 }
       }

HISTORY
       OpenSSL support added in	7.61.0,	available when built with  OpenSSL  >=
       1.1.1.	LibreSSL support added in 8.3.0, available when	built with Li-
       breSSL >= 3.4.1.	 wolfSSL support added	in  8.10.0.   mbedTLS  support
       added  in  8.10.0,  available when built	with mbedTLS >=	3.6.0.	Rustls
       support added in	8.10.0.

       Before curl 8.10.0 with mbedTLS or wolfSSL, TLS 1.3 cipher suites  were
       set by using the	CURLOPT_PROXY_SSL_CIPHER_LIST(3) option.

AVAILABILITY
       Added in	curl 7.61.0

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK	(0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLOPT_PROXY_SSLVERSION(3),   CURLOPT_PROXY_SSL_CIPHER_LIST(3),	  CUR-
       LOPT_SSLVERSION(3),    CURLOPT_SSL_CIPHER_LIST(3),    CURLOPT_TLS13_CI-
       PHERS(3)

libcurl				  2025-06-03	     CURLOPT_P...13_CIPHERS(3)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=CURLOPT_PROXY_TLS13_CIPHERS&sektion=3&manpath=FreeBSD+Ports+14.3.quarterly>

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