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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 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 General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file */ declare( strict_types = 1 ); namespace MediaWiki\Password; use LogicException; /** * Implements Argon2, a modern key derivation algorithm designed to resist GPU cracking and * side-channel attacks. * * @see https://en.wikipedia.org/wiki/Argon2 */ class Argon2Password extends Password { /** * @var null[] Array with known password_hash() option names as keys */ private const KNOWN_OPTIONS = [ 'memory_cost' => null, 'time_cost' => null, 'threads' => null, ]; /** * @inheritDoc */ protected function isSupported(): bool { return defined( 'PASSWORD_ARGON2ID' ); } /** * @return mixed[] Array of 2nd and third parameters to password_hash() */ private function prepareParams(): array { switch ( $this->config['algo'] ) { case 'argon2i': $algo = PASSWORD_ARGON2I; break; case 'argon2id': case 'auto': $algo = PASSWORD_ARGON2ID; break; default: throw new LogicException( "Unexpected algo: {$this->config['algo']}" ); } $params = array_intersect_key( $this->config, self::KNOWN_OPTIONS ); return [ $algo, $params ]; } /** * @inheritDoc */ public function crypt( string $password ): void { [ $algo, $params ] = $this->prepareParams(); $this->hash = password_hash( $password, $algo, $params ); } /** * @inheritDoc */ public function verify( string $password ): bool { return password_verify( $password, $this->hash ); } /** * @inheritDoc */ public function toString(): string { $res = ":argon2:{$this->hash}"; $this->assertIsSafeSize( $res ); return $res; } /** * @inheritDoc */ public function needsUpdate(): bool { [ $algo, $params ] = $this->prepareParams(); return password_needs_rehash( $this->hash, $algo, $params ); } } /** @deprecated since 1.43 use MediaWiki\\Password\\Argon2Password */ class_alias( Argon2Password::class, 'Argon2Password' );
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