bionic (3) CURLOPT_SSL_CIPHER_LIST.3.gz

NAME

       CURLOPT_SSL_CIPHER_LIST - specify ciphers to use for TLS

SYNOPSIS

       #include <curl/curl.h>

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

DESCRIPTION

       Pass  a  char  *,  pointing  to  a  zero terminated string holding the list of ciphers to use for the SSL
       connection. The list must be syntactically correct, it consists of one or more cipher  strings  separated
       by  colons.  Commas or spaces are also acceptable separators but colons are normally used, !, - and + can
       be used as operators.

       For OpenSSL and GnuTLS valid  examples  of  cipher  lists  include  'RC4-SHA',  ´SHA1+DES´,  'TLSv1'  and
       'DEFAULT'. The default list is normally set when you compile OpenSSL.

       You'll find more details about cipher lists on this URL:

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

       For  NSS,  valid examples of cipher lists include 'rsa_rc4_128_md5', ´rsa_aes_128_sha´, etc. With NSS you
       don't add/remove ciphers. If one uses this option then all known ciphers  are  disabled  and  only  those
       passed in are enabled.

       For WolfSSL, valid examples of cipher lists include ´ECDHE-RSA-RC4-SHA´, 'AES256-SHA:AES256-SHA256', etc.

       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_SSL_CIPHER_LIST, "TLSv1");
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY

       If built TLS enabled.

RETURN VALUE

       Returns  CURLE_OK  if  TLS is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was
       insufficient heap space.

SEE ALSO

       CURLOPT_SSLVERSION(3), CURLOPT_USE_SSL(3),