plucky (3) CURLOPT_PROXY_SSL_CIPHER_LIST.3.gz

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  pointer, pointing to a null-terminated string holding the list of cipher suites to use for
       the TLS 1.2 (1.1, 1.0) connection to the HTTPS  proxy.   The  list  must  be  syntactically  correct,  it
       consists of one or more cipher suite strings separated by colons.

       For setting TLS 1.3 ciphers see CURLOPT_PROXY_TLS13_CIPHERS(3).

       A valid example of a cipher list is:
       "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:"
       "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305"

       For  Schannel,  you  can  use  this option to set algorithms but not specific cipher suites. Refer to the
       ciphers lists document for algorithms.

       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: BearSSL, OpenSSL, Schannel, Secure Transport,
       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, "https://localhost");
           curl_easy_setopt(curl, CURLOPT_PROXY_SSL_CIPHER_LIST,
                            "ECDHE-ECDSA-CHACHA20-POLY1305:"
                            "ECDHE-RSA-CHACHA20-POLY1305");
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

HISTORY

       OpenSSL support added in 7.52.0.  wolfSSL, Schannel, Secure  Transport,  and  BearSSL  support  added  in
       7.87.0 mbedTLS support added in 8.8.0.  Rustls support added in 8.10.0.

       Since curl 8.10.0 returns CURLE_NOT_BUILT_IN when not supported.

AVAILABILITY

       Added in curl 7.52.0

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