NAME

       CURLOPT_PROXY_SSL_CIPHER_LIST - specify ciphers to use for proxy TLS

SYNOPSIS

       #include <curl/curl.h>

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

DESCRIPTION

       Pass a char *, pointing to a zero terminated string holding the list of ciphers to use for the connection
       to  the  HTTPS  proxy.  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://www.openssl.org/docs/apps/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.

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

        http://git.fedorahosted.org/cgit/mod_nss.git/plain/docs/mod_nss.html#Directives

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

DEFAULT

       NULL, use internal default

PROTOCOLS

       All

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost");
         curl_easy_setopt(curl, CURLOPT_PROXY_SSL_CIPHER_LIST, "TLSv1");
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY

       Added in 7.52.0

       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_PROXY_SSLVERSION(3), CURLOPT_USE_SSL(3), CURLOPT_SSLVERSION(3),

libcurl 7.58.0                                    May 31, 2017                  CURLOPT_PROXY_SSL_CIPHER_LIST(3)