CURLOPT_CAPATH - specify directory holding CA certificates
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAPATH, char *capath);
Pass a char * to a zero terminated string naming a directory holding multiple CA
certificates to verify the peer with. If libcurl is built against OpenSSL, the
certificate directory must be prepared using the openssl c_rehash utility.
This makes sense only when used in combination with the
function apparently does not work in Windows due to
some limitation in openssl.
The application does not have to keep the string around after setting this
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_CAPATH, "/etc/cert-dir");
ret = curl_easy_perform(curl);
This option is supported by the OpenSSL, GnuTLS and PolarSSL backends. The NSS
backend provides the option only for backward compatibility.
CURLE_OK if supported; or an error such as:
CURLE_NOT_BUILT_IN - Not supported by the SSL backend