Manpages - CURLOPT_DOH_SSL_VERIFYSTATUS.3

CURLOPT_DOH_SSL_VERIFYSTATUS - verify the DoH SSL certificate’s status

#include <curl/curl.h>

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

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.

Note that if this option is enabled but the server does not support the TLS extension, the verification will fail.

0

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");

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

    curl_easy_perform(curl);
  }

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

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

*CURLOPT_DOH_SSL_VERIFYHOST*(3), *CURLOPT_DOH_SSL_VERIFYPEER*(3), *CURLOPT_SSL_VERIFYSTATUS*(3),