Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
CURLOPT_SS...ALGORITHMS(3) Library Functions Manual CURLOPT_SS...ALGORITHMS(3)

NAME
       CURLOPT_SSL_SIGNATURE_ALGORITHMS	- signature algorithms to use for TLS

SYNOPSIS
       #include	<curl/curl.h>

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

DESCRIPTION
       Pass  a	char pointer, pointing to a null-terminated string holding the
       list of signature algorithms to use for the TLS	connection.  The  list
       must be syntactically correct, it consists of one or more signature al-
       gorithm strings separated by colons.

       A valid example of a signature algorithms list with OpenSSL is:
       "DSA+SHA256:rsa_pss_pss_sha256"

       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.

       Works with OpenSSL and its BoringSSL fork (added	in 8.14.0).

DEFAULT
       NULL, use 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

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_SSL_SIGNATURE_ALGORITHMS,
			    "DSA+SHA256:rsa_pss_pss_sha256");
	   res = curl_easy_perform(curl);
	   curl_easy_cleanup(curl);
	 }
       }

HISTORY
       OpenSSL support added in	8.14.0.

AVAILABILITY
       Added in	curl 8.14.0

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_SSLVERSION(3),	      CURLOPT_SSL_CIPHER_LIST(3),	  CUR-
       LOPT_SSL_EC_CURVES(3), CURLOPT_USE_SSL(3)

libcurl				  2025-06-03	    CURLOPT_SS...ALGORITHMS(3)

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

home | help