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<?php
// We do not need this file any more
@unlink('privatekey.php');
$ltikey = __mod_lti_verify_private_key();
echo '<kid>'.$ltikey['kid'].'</kid>';
echo '<privatekey>'.$ltikey['privatekey'].'</privatekey>';
function __mod_lti_verify_private_key() {
global $error;
if (!function_exists('openssl_random_pseudo_bytes')) {
$error[] = "openssl must be loaded for openssl_random_pseudo_bytes to function";
return null;
}
// Create the private key.
$kid = bin2hex(openssl_random_pseudo_bytes(10));
$config = array(
"digest_alg" => "sha256",
"private_key_bits" => 2048,
"private_key_type" => OPENSSL_KEYTYPE_RSA,
);
$res = openssl_pkey_new($config);
openssl_pkey_export($res, $privatekey);
return array(
'kid' => $kid,
'privatekey' => $privatekey,
);
}
?>