NAME

       CURLOPT_PROXY_SSL_CIPHER_LIST - ciphers to use for HTTPS proxy

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 null-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.

       For  NSS,  valid  examples  of cipher lists include rsa_rc4_128_md5, rsa_aes_128_sha, etc.
       With NSS you do not 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.

       For BearSSL, valid examples of cipher lists include ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-
       AES128-GCM-SHA256,           or           when          using          IANA          names
       TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256:TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,    etc.
       With BearSSL you do not add/remove ciphers. If one uses this option then all known ciphers
       are disabled and only those passed in are enabled.

       you will 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.

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, in 7.83.0 for BearSSL

       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_TLS13_CIPHERS(3),  CURLOPT_PROXY_SSLVERSION(3),  CURLOPT_SSL_CIPHER_LIST(3),
       CURLOPT_TLS13_CIPHERS(3), CURLOPT_SSLVERSION(3),