/**
* XOR two-way encryption/decryption, with a base64 wrapper.
*
* @package s2Member\Utilities
* @since 3.5
*
* @param str $base64 A string of data to decrypt. Should still be base64 encoded.
* @param str $key Optional. Key used originally for encryption. Defaults to the one configured for s2Member. Short of that, defaults to: ``wp_salt()``.
* @return str Decrypted string.
*/
public static function xdecrypt($base64 = FALSE, $key = FALSE)
{
$base64 = is_string($base64) ? $base64 : "";
$e = strlen($base64) ? c_ws_plugin__s2member_utils_strings::base64_url_safe_decode($base64) : "";
if (strlen($e) && preg_match("/^~xe(?:\\:([a-zA-Z0-9]+))?\\|(.*?)\$/s", $e, $md5_e)) {
$key = c_ws_plugin__s2member_utils_encryption::key($key);
if (strlen($md5_e[2]) && (!$md5_e[1] || $md5_e[1] === md5($md5_e[2]))) {
for ($i = 1, $d = ""; $i <= strlen($md5_e[2]); $i++) {
$char = substr($md5_e[2], $i - 1, 1);
$keychar = substr($key, $i % strlen($key) - 1, 1);
$d .= chr(ord($char) - ord($keychar));
}
}
if (isset($d) && is_string($d) && strlen($d)) {
if (strlen($d = preg_replace("/^~xe\\|/", "", $d, 1, $xe)) && $xe) {
$d = $d;
} else {
// Else we need to empty this out.
$d = "";
}
}
return isset($d) && is_string($d) && strlen($d) ? $string = $d : "";
} else {
// Otherwise we must fail here with an empty string value.
return "";
}
}
/**
* XOR two-way encryption/decryption, with a base64 wrapper.
*
* @package s2Member\Utilities
* @since 3.5
*
* @param string $base64 A string of data to decrypt. Should still be base64 encoded.
* @param string $key Optional. Key used originally for encryption. Defaults to the one configured for s2Member. Short of that, defaults to: ``wp_salt()``.
*
* @return string Decrypted string.
*/
public static function xdecrypt($base64 = '', $key = '')
{
$base64 = is_string($base64) ? $base64 : '';
$e = isset($base64[0]) ? c_ws_plugin__s2member_utils_strings::base64_url_safe_decode($base64) : '';
if (isset($e[0]) && preg_match('/^~xe(?:\\:([a-zA-Z0-9]+))?\\|(.*)$/s', $e, $md5_e)) {
$key = c_ws_plugin__s2member_utils_encryption::key($key);
if (isset($md5_e[2][0]) && (empty($md5_e[1]) || $md5_e[1] === md5($md5_e[2]))) {
for ($i = 1, $d = ''; $i <= strlen($md5_e[2]); $i++) {
$char = substr($md5_e[2], $i - 1, 1);
$keychar = substr($key, $i % strlen($key) - 1, 1);
$d .= chr(ord($char) - ord($keychar));
}
}
if (isset($d) && is_string($d) && isset($d[0])) {
if (!strlen($d = preg_replace('/^~xe\\|/', '', $d, 1, $xe)) || !$xe) {
$d = '';
}
}
// Force empty string; bad decryption.
return isset($d) && is_string($d) && isset($d[0]) ? $string = $d : '';
// Default to empty string.
}
return '';
// Default to empty string.
}
