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CURLOPT_PROXY_TLS13_CIPHERS(3) curl_easy_setopt options CURLOPT_PROXY_TLS13_CIPHERS(3)

CURLOPT_PROXY_TLS13_CIPHERS - ciphers suites for proxy TLS 1.3

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLS13_CIPHERS,
                          char *list);

Pass a char *, pointing to a null-terminated string holding the list of cipher suites to use for the TLS 1.3 connection to a proxy. The list must be syntactically correct, it consists of one or more cipher suite strings separated by colons.

you will find more details about cipher lists on this URL:

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

This option is currently used only when curl is built to use OpenSSL 1.1.1 or later. If you are using a different SSL backend you can try setting TLS 1.3 cipher suites by using the CURLOPT_PROXY_SSL_CIPHER_LIST option.

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

NULL, use internal default

All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
  curl_easy_setopt(curl, CURLOPT_PROXY_TLS13_CIPHERS,
                   "TLS13-CHACHA20-POLY1305-SHA256");
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

Added in 7.61.0. Available when built with OpenSSL >= 1.1.1.

Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.

CURLOPT_PROXY_SSL_CIPHER_LIST(3), CURLOPT_PROXY_SSLVERSION(3), CURLOPT_SSL_CIPHER_LIST(3), CURLOPT_TLS13_CIPHERS(3), CURLOPT_SSLVERSION(3),
November 26, 2021 libcurl 7.83.1

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