mirror of
https://github.com/curl/curl.git
synced 2024-12-09 06:30:06 +08:00
ad9bc5976d
Add licensing and copyright information for all files in this repository. This either happens in the file itself as a comment header or in the file `.reuse/dep5`. This commit also adds a Github workflow to check pull requests and adapts copyright.pl to the changes. Closes #8869
97 lines
4.2 KiB
Groff
97 lines
4.2 KiB
Groff
.\" **************************************************************************
|
|
.\" * _ _ ____ _
|
|
.\" * Project ___| | | | _ \| |
|
|
.\" * / __| | | | |_) | |
|
|
.\" * | (__| |_| | _ <| |___
|
|
.\" * \___|\___/|_| \_\_____|
|
|
.\" *
|
|
.\" * Copyright (C) 1998 - 2022, 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.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.
|
|
.\" *
|
|
.\" * SPDX-License-Identifier: curl
|
|
.\" *
|
|
.\" **************************************************************************
|
|
.\"
|
|
.TH CURLOPT_SSL_OPTIONS 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
|
|
.SH NAME
|
|
CURLOPT_SSL_OPTIONS \- SSL behavior options
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <curl/curl.h>
|
|
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_OPTIONS, long bitmask);
|
|
.fi
|
|
.SH DESCRIPTION
|
|
Pass a long with a bitmask to tell libcurl about specific SSL
|
|
behaviors. Available bits:
|
|
.IP CURLSSLOPT_ALLOW_BEAST
|
|
Tells libcurl to not attempt to use any workarounds for a security flaw in the
|
|
SSL3 and TLS1.0 protocols. If this option is not used or this bit is set to 0,
|
|
the SSL layer libcurl uses may use a work-around for this flaw although it
|
|
might cause interoperability problems with some (older) SSL
|
|
implementations. WARNING: avoiding this work-around lessens the security, and
|
|
by setting this option to 1 you ask for exactly that. This option is only
|
|
supported for Secure Transport, NSS and OpenSSL.
|
|
.IP CURLSSLOPT_NO_REVOKE
|
|
Tells libcurl to disable certificate revocation checks for those SSL backends
|
|
where such behavior is present. This option is only supported for Schannel
|
|
(the native Windows SSL library), with an exception in the case of Windows'
|
|
Untrusted Publishers block list which it seems cannot be bypassed. (Added in
|
|
7.44.0)
|
|
.IP CURLSSLOPT_NO_PARTIALCHAIN
|
|
Tells libcurl to not accept "partial" certificate chains, which it otherwise
|
|
does by default. This option is only supported for OpenSSL and will fail the
|
|
certificate verification if the chain ends with an intermediate certificate
|
|
and not with a root cert. (Added in 7.68.0)
|
|
.IP CURLSSLOPT_REVOKE_BEST_EFFORT
|
|
Tells libcurl to ignore certificate revocation checks in case of missing or
|
|
offline distribution points for those SSL backends where such behavior is
|
|
present. This option is only supported for Schannel (the native Windows SSL
|
|
library). If combined with \fICURLSSLOPT_NO_REVOKE\fP, the latter takes
|
|
precedence. (Added in 7.70.0)
|
|
.IP CURLSSLOPT_NATIVE_CA
|
|
Tell libcurl to use the operating system's native CA store for certificate
|
|
verification. Works only on Windows when built to use OpenSSL. This option is
|
|
experimental and behavior is subject to change.
|
|
(Added in 7.71.0)
|
|
.IP CURLSSLOPT_AUTO_CLIENT_CERT
|
|
Tell libcurl to automatically locate and use a client certificate for
|
|
authentication, when requested by the server. This option is only supported
|
|
for Schannel (the native Windows SSL library). Prior to 7.77.0 this was the
|
|
default behavior in libcurl with Schannel. Since the server can request any
|
|
certificate that supports client authentication in the OS certificate store it
|
|
could be a privacy violation and unexpected.
|
|
(Added in 7.77.0)
|
|
.SH DEFAULT
|
|
0
|
|
.SH PROTOCOLS
|
|
All TLS-based protocols
|
|
.SH EXAMPLE
|
|
.nf
|
|
CURL *curl = curl_easy_init();
|
|
if(curl) {
|
|
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
|
|
/* weaken TLS only for use with silly servers */
|
|
curl_easy_setopt(curl, CURLOPT_SSL_OPTIONS, CURLSSLOPT_ALLOW_BEAST |
|
|
CURLSSLOPT_NO_REVOKE);
|
|
ret = curl_easy_perform(curl);
|
|
curl_easy_cleanup(curl);
|
|
}
|
|
.fi
|
|
.SH AVAILABILITY
|
|
Added in 7.25.0
|
|
.SH RETURN VALUE
|
|
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
|
|
.SH "SEE ALSO"
|
|
.BR CURLOPT_SSLVERSION "(3), " CURLOPT_SSL_CIPHER_LIST "(3), "
|