CURLOPT_SSL_VERIFYSTATUS - Man Page

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_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 server cert using the "Certificate Status Request" TLS extension (aka. OCSP stapling).

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

0

This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

This option works only with the following TLS backends: GnuTLS and OpenSSL

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    /* ask for OCSP stapling! */
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYSTATUS, 1L);
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

Added in curl 7.41.0

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

CURLOPT_CAINFO(3), CURLOPT_SSL_VERIFYHOST(3), CURLOPT_SSL_VERIFYPEER(3)

curl_easy_setopt(3), CURLOPT_DOH_SSL_VERIFYSTATUS(3), libcurl-errors(3), libcurl-symbols(3).