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<?php
/**
* Nextcloud - user_sql
*
* @copyright 2018 Marcin Łojewski <dev@mlojewski.me>
* @author Marcin Łojewski <dev@mlojewski.me>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace OCA\UserSQL\Crypto;
use OCP\IL10N;
/**
* SSHA* hash implementation.
*
* @author Marcin Łojewski <dev@mlojewski.me>
*/
abstract class SSHA extends AbstractAlgorithm
{
/**
* The class constructor.
*
* @param IL10N $localization The localization service.
*/
public function __construct(IL10N $localization)
{
parent::__construct($localization);
}
/**
* @inheritdoc
*/
public function checkPassword($password, $dbHash, $salt = null)
{
$saltedPassword = base64_decode(
preg_replace("/" . $this->getPrefix() . "/i", "", $dbHash)
);
$salt = substr($saltedPassword, -(strlen($saltedPassword) - $this->getHashLength()));
$hash = self::ssha($password, $salt);
return hash_equals($dbHash, $hash);
}
/**
* Get hash prefix eg. {SSHA256}.
*
* @return string The hash prefix.
*/
public abstract function getPrefix();
/**
* Encrypt using SSHA* algorithm.
*
* @param string $password The password.
* @param string $salt The salt to use.
*
* @return string The hashed password, prefixed by {SSHA*}.
*/
private function ssha($password, $salt)
{
return $this->getPrefix() . base64_encode(
hash($this->getAlgorithm(), $password . $salt, true) . $salt
);
}
/**
* Get algorithm used by the hash() function.
*
* @see hash()
* @return string
*/
public abstract function getAlgorithm();
/**
* Get hash length.
*
* @return int The hash length.
*/
public abstract function getHashLength();
/**
* @inheritdoc
*/
public function getPasswordHash($password, $salt = null)
{
return self::ssha(
$password, Utils::randomString(
32, "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
)
);
}
}
|
