CURLOPT_DOH_SSL_VERIFYHOST - verify the host name in the DoH SSL certificate
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DOH_SSL_VERIFYHOST,
long verify);
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 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,
is also set to zero and cannot be
overridden.
2
DoH
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);
}
Added in 7.76.0
If built TLS enabled.
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
CURLOPT_DOH_SSL_VERIFYPEER(3),
CURLOPT_SSL_VERIFYHOST(3),
CURLOPT_SSL_VERIFYPEER(3),
CURLOPT_PROXY_SSL_VERIFYPEER(3),
CURLOPT_PROXY_SSL_VERIFYHOST(3),