CURLOPT_CAINFO(3) Library Functions Manual 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 pointer to a null-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 CA
certificate bundle is assumed to be stored, as established at build
time.
(iOS and macOS) When curl uses Secure Transport this option is
supported. If the option is not set, then curl uses the certificates in
the system and user Keychain to verify the peer.
(Schannel) This option is supported for Schannel in Windows 7 or later
but we recommend not using it until Windows 8 since it works better
starting then. If the option is not set, then curl uses the
certificates in the Windows' store of root certificates (the default
for Schannel).
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_CAINFO(3).
DEFAULT
Built-in system specific. When curl is built with Secure Transport or
Schannel, this option is not set by default.
PROTOCOLS
This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS,
POP3S, SMTPS etc.
All TLS backends support this option.
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_CAINFO, "/etc/certs/cabundle.pem");
curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
HISTORY
Schannel support added in libcurl 7.60.
AVAILABILITY
Added in curl 7.4.2
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
CURLINFO_CAINFO(3), CURLOPT_CAINFO_BLOB(3), CURLOPT_CAPATH(3),
CURLOPT_CA_CACHE_TIMEOUT(3), CURLOPT_SSL_VERIFYHOST(3),
CURLOPT_SSL_VERIFYPEER(3)
libcurl 2024-08-05 CURLOPT_CAINFO(3)
curl 8.9.1 - Generated Sat Aug 10 12:35:02 CDT 2024