curl/docs/cmdline-opts/proxy-tls13-ciphers.md

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Long: proxy-tls13-ciphers
Arg: <ciphersuite list>
help: TLS 1.3 proxy cipher suites
Protocols: TLS
Category: proxy tls
Added: 7.61.0
Multi: single
See-also:
  - tls13-ciphers
  - curves
  - proxy-ciphers
Example:
  - --proxy-tls13-ciphers TLS_AES_128_GCM_SHA256 -x proxy $URL
---

# `--proxy-tls13-ciphers`

Specify which cipher suites to use in the connection to your HTTPS proxy when
it negotiates TLS 1.3. The list of ciphers suites must specify valid ciphers.
Read up on TLS 1.3 cipher suite details 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 --proxy-ciphers option.
docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751 2024-01-21 06:18:43 +08:00			`---`
copyright: update all copyright lines and remove year ranges - they are mostly pointless in all major jurisdictions - many big corporations and projects already don't use them - saves us from pointless churn - git keeps history for us - the year range is kept in COPYING checksrc is updated to allow non-year using copyright statements Closes #10205 2023-01-02 20:51:48 +08:00			`c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.`
docs/cmdline-opts: add copyright and license identifier to each file gen.pl now insists on C: and SPDX-License-Identifier: fields to be present in all files. Closes #9002 2022-06-14 06:12:03 +08:00			`SPDX-License-Identifier: curl`
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 2018-05-29 22:12:52 +08:00			`Long: proxy-tls13-ciphers`
			`Arg: <ciphersuite list>`
			`help: TLS 1.3 proxy cipher suites`
			`Protocols: TLS`
docs: add categories to all cmdline opts Adapted gen.pl with 'listcats' This commit is a part of "--help me if you can" Closes #5680 2020-07-13 20:15:04 +08:00			`Category: proxy tls`
cmdline-opts: made the 'Added:' field mandatory Since "too old" versions are no longer included in the generated man page, this field is now mandatory so that it won't be forgotten and then not included in the documentation. Closes #7786 2021-09-28 17:50:07 +08:00			`Added: 7.61.0`
cmdline/docs: add a required 'multi' keyword for each option The keyword specifies how option works when specified multiple times: - single: the last provided value replaces the earlier ones - append: it supports being provided multiple times - boolean: on/off values - mutex: flag-like option that disable anoter flag The 'gen.pl' script then outputs the proper and unified language for each option's multi-use behavior in the generated man page. The multi: header is requires in each .d file and will cause build error if missing or set to an unknown value. Closes #9759 2022-10-18 16:39:43 +08:00			`Multi: single`
docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751 2024-01-21 06:18:43 +08:00			`See-also:`
			`- tls13-ciphers`
			`- curves`
			`- proxy-ciphers`
			`Example:`
			`- --proxy-tls13-ciphers TLS_AES_128_GCM_SHA256 -x proxy $URL`
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 2018-05-29 22:12:52 +08:00			`---`
docs/cmdline: change to .md for cmdline docs - switch all invidual files documenting command line options into .md, as the documentation is now markdown-looking. - made the parser treat 4-space indents as quotes - switch to building the curl.1 manpage using the "mainpage.idx" file, which lists the files to include to generate it, instead of using the previous page-footer/headers. Also, those files are now also .md ones, using the same format. I gave them underscore prefixes to make them sort separately: _NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md, _VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md, _OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md, _EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md - updated test cases accordingly Closes #12751 2024-01-21 06:18:43 +08:00
			# `--proxy-tls13-ciphers`

cmdline-opts: language cleanups Use imperative mood consistently for the first sentence describing an option. "Set this" instead "tell curl to set" or "this sets..." Plus some extra cleanups and rephrasing. Closes #13106 2024-03-12 17:34:58 +08:00			`Specify which cipher suites to use in the connection to your HTTPS proxy when`
			`it negotiates TLS 1.3. The list of ciphers suites must specify valid ciphers.`
			`Read up on TLS 1.3 cipher suite details on this URL:`
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 2018-05-29 22:12:52 +08:00
docs: provide more see also for cipher options More cross references. Hide nroff errors. Closes #11513 2023-07-25 16:28:18 +08:00			`https://curl.se/docs/ssl-ciphers.html`
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 2018-05-29 22:12:52 +08:00
tls13-docs: mention it is only for OpenSSL >= 1.1.1 Reported-by: Jay Satiro Co-authored-by: Jay Satiro Fixes #3938 Closes #3946 2019-05-27 14:01:18 +08:00			`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 --proxy-ciphers option.`