82 lines
2.8 KiB
Groff
82 lines
2.8 KiB
Groff
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.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_TLS13_CIPHERS 3 "25 May 2018" libcurl libcurl
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.SH NAME
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CURLOPT_TLS13_CIPHERS \- ciphers suites to use for TLS 1.3
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TLS13_CIPHERS, char *list);
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.fi
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.SH DESCRIPTION
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Pass a char *, pointing to a null-terminated string holding the list of cipher
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suites to use for the TLS 1.3 connection. The list must be syntactically
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correct, it consists of one or more cipher suite strings separated by colons.
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Find more details about cipher lists on this URL:
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https://curl.se/docs/ssl-ciphers.html
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This option is currently used only when curl is built to use OpenSSL 1.1.1 or
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later, or Schannel. If you are using a different SSL backend you can try
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setting TLS 1.3 cipher suites by using the \fICURLOPT_SSL_CIPHER_LIST(3)\fP
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option.
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The application does not have to keep the string around after setting this
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option.
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.SH DEFAULT
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NULL, use internal default
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.SH PROTOCOLS
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All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
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.SH EXAMPLE
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.nf
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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curl_easy_setopt(curl, CURLOPT_TLS13_CIPHERS,
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"TLS_CHACHA20_POLY1305_SHA256");
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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.fi
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.SH AVAILABILITY
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Added in 7.61.0 for OpenSSL. Available when built with OpenSSL >= 1.1.1.
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Added in 7.85.0 for Schannel.
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.SH RETURN VALUE
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Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.
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.SH "SEE ALSO"
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.BR CURLOPT_PROXY_SSL_CIPHER_LIST (3),
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.BR CURLOPT_PROXY_SSLVERSION (3),
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.BR CURLOPT_PROXY_TLS13_CIPHERS (3),
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.BR CURLOPT_SSL_CIPHER_LIST (3),
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.BR CURLOPT_SSLVERSION (3),
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.BR CURLOPT_USE_SSL (3)
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