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| 1 | <?php |
| 2 | /** |
| 3 | * Helper for deleting unused local passwords. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 18 | * http://www.gnu.org/copyleft/gpl.html |
| 19 | * |
| 20 | * @file |
| 21 | * @ingroup Maintenance |
| 22 | */ |
| 23 | |
| 24 | use Wikimedia\Rdbms\IDatabase; |
| 25 | use Wikimedia\Rdbms\IExpression; |
| 26 | use Wikimedia\Rdbms\LikeValue; |
| 27 | |
| 28 | require_once __DIR__ . '/../Maintenance.php'; |
| 29 | |
| 30 | /** |
| 31 | * Delete unused local passwords. |
| 32 | * |
| 33 | * Mainly intended to be used as a base class by authentication extensions to provide maintenance |
| 34 | * scripts which allow deleting local passwords for users who have another way of logging in. |
| 35 | * Such scripts would customize how to locate users who have other login methods and don't need |
| 36 | * local login anymore. |
| 37 | * Make sure to set LocalPasswordPrimaryAuthenticationProvider to loginOnly => true or disable it |
| 38 | * completely before running this, otherwise it might recreate passwords. |
| 39 | * |
| 40 | * This class can also be used directly to just delete all local passwords, or those for a specific |
| 41 | * user. Deleting all passwords is useful when the wiki has used local password login in the past |
| 42 | * but it has been disabled. |
| 43 | */ |
| 44 | class DeleteLocalPasswords extends Maintenance { |
| 45 | /** @var string|null User to run on, or null for all. */ |
| 46 | protected $user; |
| 47 | |
| 48 | /** @var int Number of deleted passwords. */ |
| 49 | protected $total; |
| 50 | |
| 51 | public function __construct() { |
| 52 | parent::__construct(); |
| 53 | $this->addDescription( "Deletes local password for users." ); |
| 54 | $this->setBatchSize( 1000 ); |
| 55 | |
| 56 | $this->addOption( 'user', 'If specified, only checks the given user', false, true ); |
| 57 | $this->addOption( 'delete', 'Really delete. To prevent accidents, you must provide this flag.' ); |
| 58 | $this->addOption( 'prefix', "Instead of deleting, make passwords invalid by prefixing with " |
| 59 | . "':null:'. Make sure PasswordConfig has a 'null' entry. This is meant for testing before " |
| 60 | . "hard delete." ); |
| 61 | $this->addOption( 'unprefix', 'Instead of deleting, undo the effect of --prefix.' ); |
| 62 | } |
| 63 | |
| 64 | protected function initialize() { |
| 65 | if ( |
| 66 | (int)$this->hasOption( 'delete' ) + (int)$this->hasOption( 'prefix' ) |
| 67 | + (int)$this->hasOption( 'unprefix' ) !== 1 |
| 68 | ) { |
| 69 | $this->fatalError( "Exactly one of the 'delete', 'prefix', 'unprefix' options must be used\n" ); |
| 70 | } |
| 71 | if ( $this->hasOption( 'prefix' ) || $this->hasOption( 'unprefix' ) ) { |
| 72 | $passwordHashTypes = $this->getServiceContainer()->getPasswordFactory()->getTypes(); |
| 73 | if ( |
| 74 | !isset( $passwordHashTypes['null'] ) |
| 75 | || $passwordHashTypes['null']['class'] !== InvalidPassword::class |
| 76 | ) { |
| 77 | $this->fatalError( |
| 78 | <<<'ERROR' |
| 79 | 'null' password entry missing. To use password prefixing, add |
| 80 | $wgPasswordConfig['null'] = [ 'class' => InvalidPassword::class ]; |
| 81 | to your configuration (and remove once the passwords were deleted). |
| 82 | ERROR |
| 83 | ); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | $user = $this->getOption( 'user', false ); |
| 88 | if ( $user !== false ) { |
| 89 | $userNameUtils = $this->getServiceContainer()->getUserNameUtils(); |
| 90 | $this->user = $userNameUtils->getCanonical( $user ); |
| 91 | if ( $this->user === false ) { |
| 92 | $this->fatalError( "Invalid user name\n" ); |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | public function execute() { |
| 98 | $this->initialize(); |
| 99 | |
| 100 | foreach ( $this->getUserBatches() as $userBatch ) { |
| 101 | $this->processUsers( $userBatch, $this->getUserDB() ); |
| 102 | } |
| 103 | |
| 104 | $this->output( "done. (wrote $this->total rows)\n" ); |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Get the primary DB handle for the current user batch. This is provided for the benefit |
| 109 | * of authentication extensions which subclass this and work with wiki farms. |
| 110 | * @return IDatabase |
| 111 | */ |
| 112 | protected function getUserDB() { |
| 113 | return $this->getPrimaryDB(); |
| 114 | } |
| 115 | |
| 116 | protected function processUsers( array $userBatch, IDatabase $dbw ) { |
| 117 | if ( !$userBatch ) { |
| 118 | return; |
| 119 | } |
| 120 | if ( $this->getOption( 'delete' ) ) { |
| 121 | $dbw->newUpdateQueryBuilder() |
| 122 | ->update( 'user' ) |
| 123 | ->set( [ 'user_password' => PasswordFactory::newInvalidPassword()->toString() ] ) |
| 124 | ->where( [ 'user_name' => $userBatch ] ) |
| 125 | ->caller( __METHOD__ )->execute(); |
| 126 | } elseif ( $this->getOption( 'prefix' ) ) { |
| 127 | $dbw->newUpdateQueryBuilder() |
| 128 | ->update( 'user' ) |
| 129 | ->set( [ 'user_password = ' . $dbw->buildConcat( [ $dbw->addQuotes( ':null:' ), |
| 130 | 'user_password' ] ) ] ) |
| 131 | ->where( [ |
| 132 | 'NOT (user_password ' . $dbw->buildLike( ':null:', $dbw->anyString() ) . ')', |
| 133 | $dbw->expr( 'user_password', '!=', PasswordFactory::newInvalidPassword()->toString() ), |
| 134 | 'user_password IS NOT NULL', |
| 135 | 'user_name' => $userBatch, |
| 136 | ] ) |
| 137 | ->caller( __METHOD__ )->execute(); |
| 138 | } elseif ( $this->getOption( 'unprefix' ) ) { |
| 139 | $dbw->newUpdateQueryBuilder() |
| 140 | ->update( 'user' ) |
| 141 | ->set( [ 'user_password = ' . $dbw->buildSubString( 'user_password', strlen( ':null:' ) + 1 ) ] ) |
| 142 | ->where( [ |
| 143 | $dbw->expr( 'user_password', IExpression::LIKE, new LikeValue( ':null:', $dbw->anyString() ) ), |
| 144 | 'user_name' => $userBatch, |
| 145 | ] ) |
| 146 | ->caller( __METHOD__ )->execute(); |
| 147 | } |
| 148 | $this->total += $dbw->affectedRows(); |
| 149 | $this->waitForReplication(); |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * This method iterates through the requested users and returns their names in batches of |
| 154 | * self::$mBatchSize. |
| 155 | * |
| 156 | * Subclasses should reimplement this and locate users who use the specific authentication |
| 157 | * method. The default implementation just iterates through all users. Extensions that work |
| 158 | * with wikifarm should also update self::getUserDB() as necessary. |
| 159 | * @return Generator |
| 160 | */ |
| 161 | protected function getUserBatches() { |
| 162 | if ( $this->user !== null ) { |
| 163 | $this->output( "\t ... querying '$this->user'\n" ); |
| 164 | yield [ [ $this->user ] ]; |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | $lastUsername = ''; |
| 169 | $dbw = $this->getPrimaryDB(); |
| 170 | do { |
| 171 | $this->output( "\t ... querying from '$lastUsername'\n" ); |
| 172 | $users = $dbw->newSelectQueryBuilder() |
| 173 | ->select( 'user_name' ) |
| 174 | ->from( 'user' ) |
| 175 | ->where( $dbw->expr( 'user_name', '>', $lastUsername ) ) |
| 176 | ->orderBy( 'user_name ASC' ) |
| 177 | ->limit( $this->getBatchSize() ) |
| 178 | ->caller( __METHOD__ )->fetchFieldValues(); |
| 179 | if ( $users ) { |
| 180 | yield $users; |
| 181 | $lastUsername = end( $users ); |
| 182 | } |
| 183 | } while ( count( $users ) === $this->getBatchSize() ); |
| 184 | } |
| 185 | } |