6238888ca7
Drop TLS 1.3 ciphersuite-list support from SChannel because of the number of bugs in SChannel itself (a closed-source TLS library). TLS 1.3 with SChannel still works, however the ciphersuite negotiation is left entirely to SChannel. Bug: https://hackerone.com/reports/2792484 Reported-by: newfunction on hackerone Fixes https://github.com/curl/curl/issues/15482 Closes https://github.com/curl/curl/pull/15621
99 lines
2.2 KiB
Markdown
99 lines
2.2 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_TLS13_CIPHERS
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_PROXY_SSLVERSION (3)
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- CURLOPT_PROXY_SSL_CIPHER_LIST (3)
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- CURLOPT_PROXY_TLS13_CIPHERS (3)
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- CURLOPT_SSLVERSION (3)
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- CURLOPT_SSL_CIPHER_LIST (3)
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- CURLOPT_USE_SSL (3)
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Protocol:
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- TLS
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TLS-backend:
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- OpenSSL
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- wolfSSL
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- mbedTLS
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- rustls
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Added-in: 7.61.0
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---
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# NAME
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CURLOPT_TLS13_CIPHERS - ciphers suites to use for TLS 1.3
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# SYNOPSIS
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~~~c
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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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~~~
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# DESCRIPTION
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Pass a char pointer, pointing to a null-terminated string holding the list of
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cipher suites to use for the TLS 1.3 connection. The list must be
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syntactically correct, it consists of one or more cipher suite strings
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separated by colons.
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For setting TLS 1.2 (1.1, 1.0) ciphers see CURLOPT_SSL_CIPHER_LIST(3).
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A valid example of a cipher list is:
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~~~c
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"TLS_AES_128_GCM_SHA256:TLS_CHACHA20_POLY1305_SHA256"
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~~~
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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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The application does not have to keep the string around after setting this
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option.
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Using this option multiple times makes the last set string override the
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previous ones. Set it to NULL to restore to internal default.
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# DEFAULT
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NULL, use internal built-in
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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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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~~~
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# HISTORY
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OpenSSL support added in 7.61.0, available when built with OpenSSL \>= 1.1.1.
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LibreSSL support added in 8.3.0, available when built with LibreSSL \>= 3.4.1.
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wolfSSL support added in 8.10.0.
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mbedTLS support added in 8.10.0, available when built with mbedTLS \>= 3.6.0.
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Rustls support added in 8.10.0.
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Before curl 8.10.0 with mbedTLS or wolfSSL, TLS 1.3 cipher suites were set
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by using the CURLOPT_SSL_CIPHER_LIST(3) option.
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# %AVAILABILITY%
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# RETURN VALUE
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Returns CURLE_OK if supported, CURLE_NOT_BUILT_IN otherwise.
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