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c: Copyright (C) Daniel Stenberg, <daniel.se>, et al. SPDX-License-Identifier: curl Title: CURLOPT_DOH_SSL_VERIFYSTATUS Section: 3 Source: libcurl See-also:

• CURLOPT_DOH_SSL_VERIFYHOST (3)
• CURLOPT_DOH_SSL_VERIFYPEER (3)
• CURLOPT_SSL_VERIFYSTATUS (3)

---

NAME

CURLOPT_DOH_SSL_VERIFYSTATUS - verify the DoH SSL certificate's status

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DOH_SSL_VERIFYSTATUS,
                          long verify);

DESCRIPTION

Pass a long as parameter set to 1 to enable or 0 to disable.

This option determines whether libcurl verifies the status of the DoH (DNS-over-HTTPS) server cert using the “Certificate Status Request” TLS extension (aka. OCSP stapling).

This option is the DoH equivalent of CURLOPT_SSL_VERIFYSTATUS(3) and only affects requests to the DoH server.

If this option is enabled and the server does not support the TLS extension, the verification fails.

DEFAULT

0

PROTOCOLS

DoH

EXAMPLE

int main(void)
{
  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");

    /* Ask for OCSP stapling when verifying the DoH server */
    curl_easy_setopt(curl, CURLOPT_DOH_SSL_VERIFYSTATUS, 1L);

    curl_easy_perform(curl);
  }
}

AVAILABILITY

Added in 7.76.0. This option is currently only supported by the OpenSSL, and GnuTLS TLS backends.

RETURN VALUE

Returns CURLE_OK if OCSP stapling is supported by the SSL backend, otherwise returns CURLE_NOT_BUILT_IN.