/**
* Verifies an s2Member-generated signature; in a full URL, a partial URI, or in just a query string.
*
* @package s2Member\Utilities
* @since 111106
*
* @param str $url_uri_query A full URL, a partial URI, or just a query string. Must have an s2Member-generated signature to validate.
* @param bool $check_time Optional. Defaults to false. If true, s2Member will also check if the signature has expired, based on ``$exp_secs``.
* @param str|int $exp_secs Optional. Defaults to (int)10. If ``$check_time`` is true, s2Member will check if the signature has expired, based on ``$exp_secs``.
* @param str $sig_var Optional. The name of the s2Member-generated signature variable. Defaults to `_s2member_sig`.
* @return bool True if the s2Member-generated signature is OK, else false.
*/
public static function s2member_sig_ok($url_uri_query = FALSE, $check_time = FALSE, $exp_secs = FALSE, $sig_var = FALSE)
{
$url_uri_query = $query = c_ws_plugin__s2member_utils_strings::trim((string) $url_uri_query, false, "?&=");
if (preg_match("/^(?:[a-z]+\\:\\/\\/|\\/)/i", $url_uri_query)) {
$query = trim(c_ws_plugin__s2member_utils_urls::parse_url($url_uri_query, PHP_URL_QUERY), "?&=");
}
/**/
$check_time = $check_time ? true : false;
$exp_secs = is_numeric($exp_secs) ? (int) $exp_secs : 10;
$sig_var = $sig_var && is_string($sig_var) ? $sig_var : "_s2member_sig";
/**/
$key = c_ws_plugin__s2member_utils_encryption::key();
/**/
if (preg_match_all("/" . preg_quote($sig_var, "/") . "\\=([0-9]+)-([^&\$]+)/", $query, $sigs)) {
$query = c_ws_plugin__s2member_utils_urls::remove_s2member_sigs($query, $sig_var);
/**/
wp_parse_str($query, $vars);
$vars = c_ws_plugin__s2member_utils_arrays::remove_0b_strings(c_ws_plugin__s2member_utils_strings::trim_deep($vars));
$vars = serialize(c_ws_plugin__s2member_utils_arrays::ksort_deep($vars));
/**/
($time = $sigs[1][$i = count($sigs[1]) - 1]) . ($sig = $sigs[2][$i]) . ($valid_sig = md5($key . $time . $vars));
/**/
if ($check_time) {
return $sig === $valid_sig && $time >= strtotime("-" . $exp_secs . " seconds");
} else {
/* Ignoring time? Just need to compare signatures in this case. */
return $sig === $valid_sig;
}
} else {
/* Return false. No ``$query``, or no ``$sigs``. */
return false;
}
}
/**
* Verifies an s2Member-generated signature; in a full URL, a partial URI, or in just a query string.
*
* @package s2Member\Utilities
* @since 111106
*
* @param string $url_uri_query A full URL, a partial URI, or just a query string. Must have an s2Member-generated signature to validate.
* @param bool $check_time Optional. Defaults to false. If true, s2Member will also check if the signature has expired, based on ``$exp_secs``.
* @param string|int $exp_secs Optional. Defaults to (int)10. If ``$check_time`` is true, s2Member will check if the signature has expired, based on ``$exp_secs``.
* @param string $sig_var Optional. The name of the s2Member-generated signature variable. Defaults to `_s2member_sig`.
* @return bool True if the s2Member-generated signature is OK, else false.
*/
public static function s2member_sig_ok($url_uri_query = FALSE, $check_time = FALSE, $exp_secs = FALSE, $sig_var = FALSE)
{
$url_uri_query = $query = c_ws_plugin__s2member_utils_strings::trim((string) $url_uri_query, false, '?&=');
if (preg_match('/^(?:[a-z]+\\:\\/\\/|\\/)/i', $url_uri_query)) {
// Is this a full URL or a partial URI?
$query = trim(c_ws_plugin__s2member_utils_urls::parse_url($url_uri_query, PHP_URL_QUERY), '?&=');
}
$check_time = (bool) $check_time;
// Check time?
$exp_secs = is_numeric($exp_secs) ? (int) $exp_secs : 10;
$sig_var = $sig_var && is_string($sig_var) ? $sig_var : '_s2member_sig';
$key = c_ws_plugin__s2member_utils_encryption::key();
// Obtain key.
if (preg_match_all('/' . preg_quote($sig_var, '/') . '\\=([0-9]+)-([^&$]+)/', $query, $sigs)) {
$query = c_ws_plugin__s2member_utils_urls::remove_s2member_sigs($query, $sig_var);
wp_parse_str($query, $vars);
// Parse the query string into an array of ``$vars``.
$vars = c_ws_plugin__s2member_utils_arrays::remove_0b_strings(c_ws_plugin__s2member_utils_strings::trim_deep($vars));
$vars = serialize(c_ws_plugin__s2member_utils_arrays::ksort_deep($vars));
$i = count($sigs[1]) - 1;
// Last one.
$time = $sigs[1][$i];
// Timestamp.
$sig = $sigs[2][$i];
// Signature.
$valid_sig = md5($key . $time . $vars);
if ($check_time) {
// This must NOT be older than ``$exp_secs`` seconds ago.
return $sig === $valid_sig && $time >= strtotime('-' . $exp_secs . ' seconds');
}
return $sig === $valid_sig;
}
return false;
// False, it's NOT ok.
}
