CURLOPT_CAINFO(3)          curl_easy_setopt options          CURLOPT_CAINFO(3)

NAME
       CURLOPT_CAINFO - path to Certificate Authority (CA) bundle

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAINFO, char *path);

DESCRIPTION
       Pass  a char * to a zero terminated string naming a file holding one or
       more certificates to verify the peer with.

       If CURLOPT_SSL_VERIFYPEER(3)  is  zero  and  you  avoid  verifying  the
       server's  certificate,  CURLOPT_CAINFO(3)  need  not  even  indicate an
       accessible file.

       This option is by default set to the system path where libcurl's cacert
       bundle is assumed to be stored, as established at build time.

       If  curl is built against the NSS SSL library, the NSS PEM PKCS#11 mod-
       ule (libnsspem.so) needs to be available for this option to work  prop-
       erly.

       (iOS  and  macOS  only) If curl is built against Secure Transport, then
       this option is supported for  backward  compatibility  with  other  SSL
       engines,  but it should not be set. If the option is not set, then curl
       will use the certificates in the system and user Keychain to verify the
       peer, which is the preferred method of verifying the peer's certificate
       chain.

       The application does not have to keep the string around  after  setting
       this option.

DEFAULT
       Built-in system specific

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

EXAMPLE
       TODO

AVAILABILITY
       For SSL engines that don't support certificate files the CURLOPT_CAINFO
       option is ignored. Refer to https://curl.haxx.se/docs/ssl-compared.html

RETURN VALUE
       Returns  CURLE_OK  if  the option is supported, CURLE_UNKNOWN_OPTION if
       not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO
       CURLOPT_CAPATH(3),    CURLOPT_SSL_VERIFYPEER(3),    CURLOPT_SSL_VERIFY-
       HOST(3),

libcurl 7.54.0                 December 21, 2016             CURLOPT_CAINFO(3)