NAME

       CURLOPT_CA_CACHE_TIMEOUT - life-time for cached certificate stores

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CA_CACHE_TIMEOUT, long age);

DESCRIPTION

       Pass  a  long,  this  sets the timeout in seconds. This tells libcurl the maximum time any
       cached certificate store it has in memory may be kept and reused for new connections. Once
       the timeout has expired, a subsequent fetch requiring a certificate has to reload it.

       Building a certificate store from a CURLOPT_CAINFO(3) file is a slow operation so curl may
       cache the generated certificate store internally to speed up future connections.

       Set to zero to completely disable caching, or set to -1 to retain the cached store  remain
       forever. By default, libcurl caches this info for 24 hours.

DEFAULT

       86400 (24 hours)

PROTOCOLS

       All

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");

           /* only reuse certificate stores for a short time */
           curl_easy_setopt(curl, CURLOPT_CA_CACHE_TIMEOUT, 60L);

           res = curl_easy_perform(curl);

           /* in this second request, the cache is not used if more than
              sixty seconds passed since the previous connection */
           res = curl_easy_perform(curl);

           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       This option was added in curl 7.87.0.

       This  option  is  supported  by  OpenSSL  and its forks (since 7.87.0) and Schannel (since
       8.5.0).

RETURN VALUE

       Returns CURLE_OK

SEE ALSO

       CURLOPT_CAINFO(3), CURLOPT_CAINFO_BLOB(3),  CURLOPT_CAPATH(3),  CURLOPT_SSL_VERIFYPEER(3),
       CURLOPT_SSL_VERIFYHOST(3)