CURLOPT_CAPATH - Man Page

directory holding CA certificates

Synopsis

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAPATH, char *capath);

Description

Pass a char * to a null-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 CURLOPT_SSL_VERIFYPEER(3) option.

The CURLOPT_CAPATH(3) 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 option.

The default value for this can be figured out with CURLINFO_CAPATH(3).

Default

A default path detected at build time.

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/");
  curl_easy_setopt(curl, CURLOPT_CAPATH, "/etc/cert-dir");
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

Availability

This option is supported by the OpenSSL, GnuTLS and mbedTLS (since 7.56.0) backends. The NSS backend provides the option only for backward compatibility.

Return Value

CURLE_OK if supported; or an error such as:

CURLE_NOT_BUILT_IN - Not supported by the SSL backend

CURLE_UNKNOWN_OPTION

CURLE_OUT_OF_MEMORY

See Also

CURLOPT_CAINFO(3), CURLOPT_STDERR(3), CURLOPT_DEBUGFUNCTION(3), CURLINFO_CAPATH(3),

Referenced By

curl_easy_getinfo(3), curl_easy_setopt(3), CURLINFO_CAPATH(3), CURLOPT_CAINFO(3), CURLOPT_CAINFO_BLOB(3), CURLOPT_DOH_SSL_VERIFYPEER(3), CURLOPT_PINNEDPUBLICKEY(3), CURLOPT_PROXY_CAINFO(3), CURLOPT_PROXY_CAINFO_BLOB(3), CURLOPT_SSL_VERIFYPEER(3), nbdkit-curl-plugin(1).

September 20, 2022 libcurl 7.86.0 curl_easy_setopt options