NAME

       CURLOPT_PROXY_CAPATH - directory holding HTTPS proxy CA certificates

SYNOPSIS

       #include <curl/curl.h>

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

DESCRIPTION

       Pass  a  char  pointer to a null-terminated string naming a directory holding multiple CA certificates to
       verify the HTTPS proxy with. If libcurl is built against  OpenSSL,  the  certificate  directory  must  be
       prepared  using  the OpenSSL c_rehash utility. This makes sense only when CURLOPT_PROXY_SSL_VERIFYPEER(3)
       is enabled (which it is by default).

       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

       NULL

PROTOCOLS

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

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

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
           /* using an HTTPS proxy */
           curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:443");
           curl_easy_setopt(curl, CURLOPT_PROXY_CAPATH, "/etc/cert-dir");
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 7.52.0

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_DEBUGFUNCTION(3),  CURLOPT_PROXY_CAINFO(3),  CURLOPT_PROXY_SSL_VERIFYHOST(3),
       CURLOPT_STDERR(3)