protected static function validate($certPem, $caCertPem, $crlPem = NULL, $crlDistCertPem = NULL)
{
$caCertObj = X509Util::loadCACert($caCertPem);
$certObj = new \File_X509();
$certObj->loadCA($caCertPem);
if ($crlPem !== NULL) {
$crlObj = new \File_X509();
if ($crlDistCertPem) {
$crlDistCertObj = X509Util::loadCrlDistCert($crlDistCertPem, NULL, $caCertPem);
if ($crlDistCertObj->getSubjectDN(FILE_X509_DN_STRING) !== $caCertObj->getSubjectDN(FILE_X509_DN_STRING)) {
throw new InvalidCertException(sprintf("CRL distributor (%s) does not act on behalf of this CA (%s)", $crlDistCertObj->getSubjectDN(FILE_X509_DN_STRING), $caCertObj->getSubjectDN(FILE_X509_DN_STRING)));
}
try {
self::validate($crlDistCertPem, $caCertPem);
} catch (InvalidCertException $ie) {
throw new InvalidCertException("CRL distributor has an invalid certificate", 0, $ie);
}
$crlObj->loadCA($crlDistCertPem);
}
$crlObj->loadCA($caCertPem);
$crlObj->loadCRL($crlPem);
if (!$crlObj->validateSignature()) {
throw new InvalidCertException("CRL signature is invalid");
}
}
$parsedCert = $certObj->loadX509($certPem);
if ($crlPem !== NULL) {
if (empty($parsedCert)) {
throw new InvalidCertException("Identity is invalid. Empty certificate.");
}
if (empty($parsedCert['tbsCertificate']['serialNumber'])) {
throw new InvalidCertException("Identity is invalid. No serial number.");
}
$revoked = $crlObj->getRevoked($parsedCert['tbsCertificate']['serialNumber']->toString());
if (!empty($revoked)) {
throw new InvalidCertException("Identity is invalid. Certificate revoked.");
}
}
if (!$certObj->validateSignature()) {
throw new InvalidCertException("Identity is invalid. Certificate is not signed by proper CA.");
}
if (!$certObj->validateDate(Time::getTime())) {
throw new ExpiredCertException("Identity is invalid. Certificate expired.");
}
}