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CURLOPT_SSL_VERIFYSTATUS

Section: curl_easy_setopt options (3)
Updated: May 31, 2017
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NAME

CURLOPT_SSL_VERIFYSTATUS - verify the certificate's status

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_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 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 will fail.

DEFAULT

PROTOCOLS

All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

EXAMPLE

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
  /* ask for OSCP stapling! */
  curl_easy_setopt(curl, CURLOPT_SSL_VERIFYSTATUS, 1L);
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

AVAILABILITY

Added in 7.41.0. This option is currently only supported by the OpenSSL, GnuTLS and NSS TLS backends.

RETURN VALUE

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