.
function crl_verify($raw_cert_data, $verbose=true) {
global $random_blurp;
$cert_data = openssl_x509_parse($raw_cert_data);
$cert_serial_nm = strtoupper(bcdechex($cert_data['serialNumber']));
$crl_uris = [];
$crl_uri = explode("\nFull Name:\n ", $cert_data['extensions']['crlDistributionPoints']);
foreach ($crl_uri as $key => $uri) {
if (!empty($uri) ) {
$uri = explode("URI:", $uri);
foreach ($uri as $key => $crluri) {
if (!empty($crluri) ) {
$crl_uris[] = preg_replace('/\s+/', '', $crluri);
}
}
}
}
foreach ($crl_uris as $key => $uri) {
if (!empty($uri)) {
if (0 === strpos($uri, 'http')) {
$fp = fopen ("/tmp/" . $random_blurp . "." . $key . ".crl", 'w+');
$ch = curl_init(($uri));
curl_setopt($ch, CURLOPT_TIMEOUT, 5);
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_FAILONERROR, true);
curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
if(curl_exec($ch) === false)
{
echo 'Curl error: ' . htmlspecialchars(curl_error($ch)) ."
";
}
curl_close($ch);
if(stat("/tmp/" . $random_blurp . "." . escapeshellcmd($key) . ".crl")['size'] < 10 ) {
return false;
}
$crl_text = shell_exec("openssl crl -noout -text -inform der -in /tmp/" . $random_blurp . "." . escapeshellcmd($key) . ".crl 2>&1");
$crl_last_update = shell_exec("openssl crl -noout -lastupdate -inform der -in /tmp/" . $random_blurp . "." . escapeshellcmd($key) . ".crl");
$crl_next_update = shell_exec("openssl crl -noout -nextupdate -inform der -in /tmp/" . $random_blurp . "." . escapeshellcmd($key) . ".crl");
unlink("/tmp/" . $random_blurp . "." . escapeshellcmd($key) . ".crl");
if ( strpos($crl_text, "unable to load CRL") === 0 ) {
if ( $verbose ) {
$result = " - CRL invalid. (" . $uri . ")
" . htmlspecialchars($crl_text) . "
";
return $result;
} else {
$result = "";
return $result;
}
}
$crl_info = explode("Revoked Certificates:", $crl_text)[0];
$crl_certificates = explode("Revoked Certificates:", $crl_text)[1];
$crl_certificates = explode("Serial Number:", $crl_certificates);
$revcert = array('bla' => "die bla");
foreach ($crl_certificates as $key => $revoked_certificate) {
if (!empty($revoked_certificate)) {
$revcert[str_replace(" ", "", explode("\n", $revoked_certificate)[0])] = str_replace(" Revocation Date: ", "", explode("\n", $revoked_certificate)[1]);
}
}
if( array_key_exists($cert_serial_nm, $revcert) ) {
if ( $verbose ) {
$result = " - REVOKED on " . $revcert[$cert_serial_nm] . ". " . $uri . "
" . $crl_last_update . " " . $crl_next_update . "
";
} else {
$result = "";
}
} else {
if ( $verbose ) {
$result = " - " . $uri . "
" . $crl_last_update . " " . $crl_next_update . "
";
} else {
$result = "";
}
}
return $result;
}
}
}
}
?>