setopt: add TLS 1.3 ciphersuites

Adds CURLOPT_TLS13_CIPHERS and CURLOPT_PROXY_TLS13_CIPHERS.

curl: added --tls13-ciphers and --proxy-tls13-ciphers

Fixes #2435
Reported-by: zzq1015 on github
Closes #2607

1 files changed, 62 insertions, 0 deletions

diff --git a/docs/libcurl/opts/CURLOPT_TLS13_CIPHERS.3 b/docs/libcurl/opts/CURLOPT_TLS13_CIPHERS.3
new file mode 100644
index 000000000..85400780c
--- /dev/null
+++ b/docs/libcurl/opts/CURLOPT_TLS13_CIPHERS.3
@@ -0,0 +1,62 @@
+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at https://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_TLS13_CIPHERS 3 "25 May 2018" "libcurl 7.61.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_TLS13_CIPHERS \- specify ciphers suites to use for TLS 1.3
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TLS13_CIPHERS, char *list);
+.SH DESCRIPTION
+Pass a char *, pointing to a zero terminated string holding the list of cipher
+suites to use for the TLS 1.3 connection. The list must be syntactically
+correct, it consists of one or more cipher suite strings separated by colons.
+
+You'll find more details about cipher lists on this URL:
+
+ https://curl.haxx.se/docs/ssl-ciphers.html
+
+The application does not have to keep the string around after setting this
+option.
+.SH DEFAULT
+NULL, use internal default
+.SH PROTOCOLS
+All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
+.SH EXAMPLE
+.nf
+CURL *curl = curl_easy_init();
+if(curl) {
+  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
+  curl_easy_setopt(curl, CURLOPT_TLS13_CIPHERS,
+                   "TLS13-CHACHA20-POLY1305-SHA256");
+  ret = curl_easy_perform(curl);
+  curl_easy_cleanup(curl);
+}
+.fi
+.SH AVAILABILITY
+Added in 7.61.0.
+Available when built with OpenSSL >= 1.1.1.
+.SH RETURN VALUE
+Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.
+.SH "SEE ALSO"
+.BR CURLOPT_SSLVERSION "(3), " CURLOPT_PROXY_TLS13_CIPHERS "(3), "