(Perl) HTTP - Verify Server is a Trusted Root CA

Demonstrates how to only allow connections to an HTTP server having a certificate with a root that is in our list of trusted CA root certificates.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
# by calling UnlockBundle.  It requires a Bundle unlock code.
$chilkatGlob = chilkat::CkGlobal->new();
$success = $chilkatGlob->UnlockBundle("Anything for 30-day trial.");
if ($success != 1) {
    print $chilkatGlob->lastErrorText() . "\r\n";
    exit;
}

#  On my particular system, the root CA cert for this URL is not pre-installed.
#  Note: This may be different for you.
#  Also, this example was written on 29-May-2015.  This URL was valid at the time,
#  but may not be valid at a future date.
$url = "https://animals.nationalgeographic.com/animals/invertebrates/starfish/";

$http = chilkat::CkHttp->new();

#  Require that the SSL/TLS server certificate is not expired,
#  and that the certificate signature is valid.
#  This does not ensure that it has a chain of authentication to
#  a trusted root.  To ensure that, the TrustedRoots object (below) is required.
$http->put_RequireSslCertVerify(1);

#  Do the HTTPS page fetch (through the SSH tunnel)
$html = $http->quickGetStr($url);
if ($http->get_LastMethodSuccess() != 1) {
    print $http->lastErrorText() . "\r\n";
    exit;
}

print "The HTTP GET was successful." . "\r\n";

#  Now let's require that HTTP requests to SSL/TLS servers that don't have trusted CA roots
#  should fail.
$trustedRoots = chilkat::CkTrustedRoots->new();

#  Indicate that we will trust any pre-installed certificates on this system.
#  (The meaning of pre-installed certificates depends on the operating system, and in
#  some environments there is no such thing as pre-installed certificates.  See the reference
#  documentation for the TrustedRoots class.)
$trustedRoots->put_TrustSystemCaRoots(1);

#  Activate the trusted roots globally for all Chilkat objects.
#  This call really shouldn't fail, so we're not checking the return value.
$success = $trustedRoots->Activate();

#  Given that our previous HTTP GET likely kept the connection open,
#  make sure that all HTTP connections are closed before re-trying.
#  Otherwise, we'll simply be re-using the pre-existing connection.
$success = $http->CloseAllConnections();

#  Now let's try fetching the URL again.  It should fail this time because
#  there is a requirement that the SSL/TLS server certificate must have a trusted root,
#  and the trusted root for this URL is not installed on my system (but may be different for you..)
$html = $http->quickGetStr($url);
if ($http->get_LastMethodSuccess() != 1) {
    print $http->lastErrorText() . "\r\n";
    print "Good, the HTTP request failed as expected." . "\r\n";
}
else {
    print $http->lastErrorText() . "\r\n";
    print "Hmmm... we did not fail as expected?" . "\r\n";
}