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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Extension\ConfirmEdit\Auth; |
| 4 | |
| 5 | use MediaWiki\Extension\ConfirmEdit\CaptchaTriggers; |
| 6 | use MediaWiki\Extension\ConfirmEdit\SimpleCaptcha\SimpleCaptcha; |
| 7 | use MediaWiki\MediaWikiServices; |
| 8 | use MediaWiki\User\User; |
| 9 | use MediaWiki\User\UserNameUtils; |
| 10 | use Wikimedia\ObjectCache\BagOStuff; |
| 11 | |
| 12 | /** |
| 13 | * Helper to count login attempts per IP and per username. |
| 14 | * |
| 15 | * @internal |
| 16 | */ |
| 17 | class LoginAttemptCounter { |
| 18 | private SimpleCaptcha $captcha; |
| 19 | |
| 20 | public function __construct( SimpleCaptcha $captcha ) { |
| 21 | $this->captcha = $captcha; |
| 22 | } |
| 23 | |
| 24 | /** |
| 25 | * Increase bad login counter after a failed login. |
| 26 | * The user might be required to solve a captcha if the count is high. |
| 27 | * @param string $username |
| 28 | * TODO use Throttler |
| 29 | */ |
| 30 | public function increaseBadLoginCounter( $username ) { |
| 31 | global $wgCaptchaBadLoginExpiration, $wgCaptchaBadLoginPerUserExpiration; |
| 32 | |
| 33 | $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getLocalClusterInstance(); |
| 34 | |
| 35 | if ( $this->captcha->triggersCaptcha( CaptchaTriggers::BAD_LOGIN ) ) { |
| 36 | $key = $this->badLoginKey( $cache ); |
| 37 | $cache->incrWithInit( $key, $wgCaptchaBadLoginExpiration ); |
| 38 | |
| 39 | // Longer period of time |
| 40 | $key = $this->badLoginKey( $cache, true ); |
| 41 | $cache->incrWithInit( $key, $wgCaptchaBadLoginExpiration * 300 ); |
| 42 | } |
| 43 | |
| 44 | if ( $this->captcha->triggersCaptcha( CaptchaTriggers::BAD_LOGIN_PER_USER ) && $username ) { |
| 45 | $key = $this->badLoginPerUserKey( $username, $cache ); |
| 46 | $cache->incrWithInit( $key, $wgCaptchaBadLoginPerUserExpiration ); |
| 47 | |
| 48 | $key = $this->badLoginPerUserKey( $username, $cache, true ); |
| 49 | $cache->incrWithInit( $key, $wgCaptchaBadLoginPerUserExpiration * 300 ); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Reset bad login counter after a successful login. |
| 55 | * @param string $username |
| 56 | */ |
| 57 | public function resetBadLoginCounter( $username ) { |
| 58 | if ( $this->captcha->triggersCaptcha( CaptchaTriggers::BAD_LOGIN_PER_USER ) && $username ) { |
| 59 | $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getLocalClusterInstance(); |
| 60 | $cache->delete( $this->badLoginPerUserKey( $username, $cache ) ); |
| 61 | $cache->delete( $this->badLoginPerUserKey( $username, $cache, true ) ); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Check if a bad login has already been registered for this |
| 67 | * IP address. If so, require a captcha. |
| 68 | * @return bool |
| 69 | */ |
| 70 | public function isBadLoginTriggered() { |
| 71 | global $wgCaptchaBadLoginAttempts; |
| 72 | |
| 73 | $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getLocalClusterInstance(); |
| 74 | return $this->captcha->triggersCaptcha( CaptchaTriggers::BAD_LOGIN ) |
| 75 | && ( |
| 76 | (int)$cache->get( $this->badLoginKey( $cache ) ) >= $wgCaptchaBadLoginAttempts || |
| 77 | (int)$cache->get( $this->badLoginKey( $cache, true ) ) >= ( $wgCaptchaBadLoginAttempts * 30 ) |
| 78 | ); |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Is the per-user captcha triggered? |
| 83 | * |
| 84 | * @param User|string $u User object, or name |
| 85 | * @return bool |
| 86 | */ |
| 87 | public function isBadLoginPerUserTriggered( $u ) { |
| 88 | global $wgCaptchaBadLoginPerUserAttempts; |
| 89 | |
| 90 | $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getLocalClusterInstance(); |
| 91 | |
| 92 | if ( is_object( $u ) ) { |
| 93 | $u = $u->getName(); |
| 94 | } |
| 95 | return $this->captcha->triggersCaptcha( CaptchaTriggers::BAD_LOGIN_PER_USER ) |
| 96 | && ( |
| 97 | (int)$cache->get( $this->badLoginPerUserKey( $u, $cache ) ) >= $wgCaptchaBadLoginPerUserAttempts || |
| 98 | (int)$cache->get( $this->badLoginPerUserKey( $u, $cache, true ) ) |
| 99 | >= ( $wgCaptchaBadLoginPerUserAttempts * 30 ) |
| 100 | ); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Internal cache key for badlogin checks. |
| 105 | * @param BagOStuff $cache |
| 106 | * @param bool $long |
| 107 | * @return string |
| 108 | */ |
| 109 | private function badLoginKey( BagOStuff $cache, $long = false ) { |
| 110 | global $wgRequest; |
| 111 | $ip = $wgRequest->getIP(); |
| 112 | if ( !$long ) { |
| 113 | return $cache->makeGlobalKey( 'captcha', 'badlogin', 'ip', $ip ); |
| 114 | } |
| 115 | return $cache->makeGlobalKey( 'captcha', 'badlogin', 'ip', 'long', $ip ); |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Cache key for badloginPerUser checks. |
| 120 | * @param string $username |
| 121 | * @param BagOStuff $cache |
| 122 | * @param bool $long |
| 123 | * @return string |
| 124 | */ |
| 125 | private function badLoginPerUserKey( $username, BagOStuff $cache, $long = false ) { |
| 126 | $userNameUtils = MediaWikiServices::getInstance()->getUserNameUtils(); |
| 127 | $username = $userNameUtils->getCanonical( $username, UserNameUtils::RIGOR_USABLE ) ?: $username; |
| 128 | if ( !$long ) { |
| 129 | return $cache->makeGlobalKey( |
| 130 | 'captcha', 'badlogin', 'user', md5( $username ) |
| 131 | ); |
| 132 | } |
| 133 | return $cache->makeGlobalKey( |
| 134 | 'captcha', 'badlogin', 'user', 'long', md5( $username ) |
| 135 | ); |
| 136 | } |
| 137 | } |