**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2021, 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.
*
**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2021, 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.
*
**************************************************************************
CURLOPT_DOH_SSL_VERIFYHOST 3 "11 Feb 2021" "libcurl 7.76.0" "curl_easy_setopt options"
NAME
CURLOPT_DOH_SSL_VERIFYHOST - verify the host name in the DoH SSL certificate
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DOH_SSL_VERIFYHOST, long verify);
DESCRIPTION
Pass a long set to 2L as asking curl to verify the DoH (DNS-over-HTTPS)
server's certificate name fields against the host name.
This option is the DoH equivalent of CURLOPT_SSL_VERIFYHOST(3) and
only affects requests to the DoH server.
When CURLOPT_DOH_SSL_VERIFYHOST(3) is 2, the SSL certificate provided by
the DoH server must indicate that the server name is the same as the server
name to which you meant to connect to, or the connection fails.
Curl considers the DoH server the intended one when the Common Name field or a
Subject Alternate Name field in the certificate matches the host name in the
DoH URL to which you told Curl to connect.
When the verify value is set to 1L it is treated the same as 2L. However
for consistency with the other VERIFYHOST options we suggest use 2 and not 1.
When the verify value is set to 0L, the connection succeeds regardless of
the names used in the certificate. Use that ability with caution!
See also CURLOPT_DOH_SSL_VERIFYPEER(3) to verify the digital signature
of the DoH server certificate. If libcurl is built against NSS and
CURLOPT_DOH_SSL_VERIFYPEER(3) is zero,
CURLOPT_DOH_SSL_VERIFYHOST(3) is also set to zero and cannot be
overridden.
DEFAULT
2
PROTOCOLS
DoH
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_DOH_URL, "https://cloudflare-dns.com/dns-query");
/* Disable host name verification of the DoH server */
curl_easy_setopt(curl, CURLOPT_DOH_SSL_VERIFYHOST, 0L);
curl_easy_perform(curl);
}
AVAILABILITY
Added in 7.76.0
If built TLS enabled.
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
"SEE ALSO"
CURLOPT_DOH_SSL_VERIFYPEER "(3), " CURLOPT_SSL_VERIFYHOST "(3), " CURLOPT_SSL_VERIFYPEER "(3), " CURLOPT_PROXY_SSL_VERIFYPEER "(3), " CURLOPT_PROXY_SSL_VERIFYHOST "(3), "