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/*-----8<--------------------------------------------------------------------
*
* BEdita - a semantic content management framework
*
* Copyright 2019 ChannelWeb Srl, Chialab Srl
*
* This file is part of BEdita: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* BEdita is distributed WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with BEdita (see LICENSE.LGPL).
* If not, see <http://gnu.org/licenses/lgpl-3.0.html>.
*
*------------------------------------------------------------------->8-----
*/
/**
* Utility to mask sensitive data.
*/
class Mask {
/**
* Completely mask a value.
*
* @param string $value Value to mask.
* @param int $maxUnmaskedChars Keep at most N characters unmasked.
* @return string
*/
public static function hide($value, $maxUnmaskedChars = 0) {
if (!is_string($value)) {
return $value;
}
$len = mb_strlen($value);
$maxUnmaskedChars = min($maxUnmaskedChars, $len - 1);
return mb_substr($value, 0, $maxUnmaskedChars) . str_repeat('*', $len - $maxUnmaskedChars);
}
/**
* Mask email.
*
* @param string $email Value to mask.
* @param int $userMaxUnmaskedChars Keep at most N characters unmasked for the username.
* @param bool $maskDomain Set to `true` to mask domain part.
* @return string
*/
public static function email($email, $userMaxUnmaskedChars = 3, $maskDomain = false)
{
if (!is_string($email) || filter_var($email, FILTER_VALIDATE_EMAIL) === false) {
return $email;
}
list($user, $domain) = explode('@', $email, 2);
$user = static::hide($user, $userMaxUnmaskedChars);
if ($maskDomain) {
$domain = static::hide($domain);
}
return implode('@', array($user, $domain));
}
}