public function DKIM_Sign($signHeader)
{
if (!defined('PKCS7_TEXT')) {
if ($this->exceptions) {
throw new Exception($this->lang('extension_missing') . 'openssl');
}
return '';
}
$privKeyStr = file_get_contents($this->DKIM_private);
if ('' != $this->DKIM_passphrase) {
$privKey = openssl_pkey_get_private($privKeyStr, $this->DKIM_passphrase);
} else {
$privKey = openssl_pkey_get_private($privKeyStr);
}
if (openssl_sign($signHeader, $signature, $privKey, 'sha256WithRSAEncryption')) {
openssl_pkey_free($privKey);
return base64_encode($signature);
}
openssl_pkey_free($privKey);
return '';
}