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72 lines
2.3 KiB
Groff
72 lines
2.3 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLOPT_DOH_SSL_VERIFYHOST.md
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.TH CURLOPT_DOH_SSL_VERIFYHOST 3 "2024-06-01" libcurl
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.SH NAME
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CURLOPT_DOH_SSL_VERIFYHOST \- verify the hostname in the DoH SSL certificate
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DOH_SSL_VERIFYHOST,
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long verify);
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.fi
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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\(aqs certificate name fields against the hostname.
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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 hostname 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 \fIVERIFYHOST\fP options we suggest use 2 and
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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.
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.SH DEFAULT
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2
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.SH PROTOCOLS
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All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
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All TLS backends support this option.
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.SH EXAMPLE
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.nf
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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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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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curl_easy_setopt(curl, CURLOPT_DOH_URL,
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"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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}
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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_PROXY_SSL_VERIFYHOST (3),
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.BR CURLOPT_PROXY_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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