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86 lines
3.3 KiB
Groff
86 lines
3.3 KiB
Groff
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.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_DOH_SSL_VERIFYHOST 3 "11 Feb 2021" "libcurl 7.76.0" "curl_easy_setopt options"
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.SH NAME
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CURLOPT_DOH_SSL_VERIFYHOST \- verify the host name in the DOH SSL certificate
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.SH SYNOPSIS
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DOH_SSL_VERIFYHOST, long verify);
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.SH DESCRIPTION
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Pass a long set to 2L as asking curl to \fIverify\fP the DOH (DNS-over-HTTPS)
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server's certificate name fields against the host name.
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This option is the DOH equivalent of \fICURLOPT_SSL_VERIFYHOST(3)\fP and
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only affects requests to the DOH server.
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When \fICURLOPT_DOH_SSL_VERIFYHOST(3)\fP is 2, the SSL certificate provided by
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the DOH server must indicate that the server name is the same as the server
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name to which you meant to connect to, or the connection fails.
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Curl considers the DOH server the intended one when the Common Name field or a
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Subject Alternate Name field in the certificate matches the host name in the
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DOH URL to which you told Curl to connect.
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When the \fIverify\fP value is set to 1L it is treated the same as 2L. However
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for consistency with the other VERIFYHOST options we suggest use 2 and not 1.
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When the \fIverify\fP value is set to 0L, the connection succeeds regardless of
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the names used in the certificate. Use that ability with caution!
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See also \fICURLOPT_DOH_SSL_VERIFYPEER(3)\fP to verify the digital signature
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of the DOH server certificate. If libcurl is built against NSS and
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\fICURLOPT_DOH_SSL_VERIFYPEER(3)\fP is zero,
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\fICURLOPT_DOH_SSL_VERIFYHOST(3)\fP is also set to zero and cannot be
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overridden.
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.SH DEFAULT
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2
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.SH PROTOCOLS
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DOH
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.SH EXAMPLE
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.nf
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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curl_easy_setopt(curl, CURLOPT_DOH_URL, "https://cloudflare-dns.com/dns-query");
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/* Disable host name verification of the DOH server */
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curl_easy_setopt(curl, CURLOPT_DOH_SSL_VERIFYHOST, 0L);
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curl_easy_perform(curl);
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}
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.fi
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.SH AVAILABILITY
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Added in 7.76.0
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If built TLS enabled.
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH "SEE ALSO"
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.BR CURLOPT_DOH_SSL_VERIFYPEER "(3), "
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.BR CURLOPT_SSL_VERIFYHOST "(3), "
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.BR CURLOPT_SSL_VERIFYPEER "(3), "
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.BR CURLOPT_PROXY_SSL_VERIFYPEER "(3), "
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.BR CURLOPT_PROXY_SSL_VERIFYHOST "(3), "
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