CURLOPT_DOH_SSL_VERIFYSTATUS(3)

1CURLOPT_DOH_SSL_VERIFYSTATUS(3)     libcurl    CURLOPT_DOH_SSL_VERIFYSTATUS(3)
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NAME

6       CURLOPT_DOH_SSL_VERIFYSTATUS - verify the DoH SSL certificate's status
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SYNOPSIS

9       #include <curl/curl.h>
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11       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DOH_SSL_VERIFYSTATUS,
12                                 long verify);
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DESCRIPTION

15       Pass a long as parameter set to 1 to enable or 0 to disable.
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17       This  option  determines whether libcurl verifies the status of the DoH
18       (DNS-over-HTTPS) server cert using the "Certificate Status Request" TLS
19       extension (aka. OCSP stapling).
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21       This  option  is  the DoH equivalent of CURLOPT_SSL_VERIFYSTATUS(3) and
22       only affects requests to the DoH server.
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24       Note that if this option is enabled but the server does not support the
25       TLS extension, the verification will fail.
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DEFAULT

28       0
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PROTOCOLS

31       DoH
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EXAMPLE

34       CURL *curl = curl_easy_init();
35       if(curl) {
36         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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38         curl_easy_setopt(curl, CURLOPT_DOH_URL, "https://cloudflare-dns.com/dns-query");
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40         /* Ask for OCSP stapling when verifying the DoH server */
41         curl_easy_setopt(curl, CURLOPT_DOH_SSL_VERIFYSTATUS, 1L);
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43         curl_easy_perform(curl);
44       }
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AVAILABILITY

47       Added  in  7.76.0.  This  option  is  currently  only  supported by the
48       OpenSSL, GnuTLS and NSS TLS backends.
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RETURN VALUE

51       Returns CURLE_OK if OCSP stapling is supported by the SSL backend, oth‐
52       erwise returns CURLE_NOT_BUILT_IN.
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