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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | |
| 21 | namespace MediaWiki\Extension\CentralAuth\Hooks\Handlers; |
| 22 | |
| 23 | use MediaWiki\Config\Config; |
| 24 | use MediaWiki\Extension\CentralAuth\CentralAuthSessionManager; |
| 25 | use MediaWiki\Extension\CentralAuth\Hooks\CentralAuthHookRunner; |
| 26 | use MediaWiki\Extension\CentralAuth\Special\SpecialCentralLogin; |
| 27 | use MediaWiki\Extension\CentralAuth\User\CentralAuthUser; |
| 28 | use MediaWiki\Hook\TempUserCreatedRedirectHook; |
| 29 | use MediaWiki\Hook\UserLoginCompleteHook; |
| 30 | use MediaWiki\HookContainer\HookContainer; |
| 31 | use MediaWiki\Logger\LoggerFactory; |
| 32 | use MediaWiki\Session\Session; |
| 33 | use MediaWiki\Title\Title; |
| 34 | use MediaWiki\User\User; |
| 35 | use MediaWiki\User\UserIdentity; |
| 36 | use MediaWiki\WikiMap\WikiMap; |
| 37 | use MWCryptRand; |
| 38 | use RequestContext; |
| 39 | |
| 40 | class LoginCompleteHookHandler implements |
| 41 | UserLoginCompleteHook, |
| 42 | TempUserCreatedRedirectHook |
| 43 | { |
| 44 | /** @var Config */ |
| 45 | private $config; |
| 46 | |
| 47 | /** @var CentralAuthSessionManager */ |
| 48 | private $sessionManager; |
| 49 | |
| 50 | /** @var CentralAuthHookRunner */ |
| 51 | private $caHookRunner; |
| 52 | |
| 53 | /** |
| 54 | * @param HookContainer $hookContainer |
| 55 | * @param Config $config |
| 56 | * @param CentralAuthSessionManager $sessionManager |
| 57 | */ |
| 58 | public function __construct( |
| 59 | HookContainer $hookContainer, |
| 60 | Config $config, |
| 61 | CentralAuthSessionManager $sessionManager |
| 62 | ) { |
| 63 | $this->caHookRunner = new CentralAuthHookRunner( $hookContainer ); |
| 64 | $this->config = $config; |
| 65 | $this->sessionManager = $sessionManager; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Start a central login redirect when it seems safe to do so. |
| 70 | * Otherwise, trigger edge login on the next request. |
| 71 | * |
| 72 | * @param User $user |
| 73 | * @param string &$inject_html |
| 74 | * @param bool|null $direct Was this directly after a login? (see T140853) |
| 75 | * @return bool |
| 76 | * |
| 77 | * @see SpecialCentralLogin |
| 78 | */ |
| 79 | public function onUserLoginComplete( $user, &$inject_html, $direct = null ) { |
| 80 | if ( !$this->config->get( 'CentralAuthCookies' ) || |
| 81 | !$this->config->get( 'CentralAuthLoginWiki' ) |
| 82 | ) { |
| 83 | // Use local sessions only. |
| 84 | return true; |
| 85 | } |
| 86 | |
| 87 | $logger = LoggerFactory::getInstance( 'CentralAuth' ); |
| 88 | $centralUser = CentralAuthUser::getInstance( $user ); |
| 89 | |
| 90 | $context = RequestContext::getMain(); |
| 91 | $request = $context->getRequest(); |
| 92 | |
| 93 | // Check that this is actually for a special login page view |
| 94 | $title = $context->getTitle(); |
| 95 | if ( $title && ( $title->isSpecial( 'Userlogin' ) || |
| 96 | $title->isSpecial( 'CreateAccount' ) ) |
| 97 | ) { |
| 98 | $logger->debug( 'CentralLogin triggered in UserLoginComplete' ); |
| 99 | $redirectUrl = $this->getRedirectUrl( |
| 100 | $request->getSession(), |
| 101 | $centralUser, |
| 102 | $request->getVal( 'returnto', '' ), |
| 103 | $request->getVal( 'returntoquery', '' ), |
| 104 | '', |
| 105 | $title->isSpecial( 'CreateAccount' ) ? 'signup' : '' |
| 106 | ); |
| 107 | $context->getOutput()->redirect( $redirectUrl ); |
| 108 | // Set $inject_html to some text to bypass the LoginForm redirection |
| 109 | $inject_html .= '<!-- do CentralAuth redirect -->'; |
| 110 | } |
| 111 | |
| 112 | return true; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Initiate a central login redirect that sets up the central session for the temp user, |
| 117 | * then returns. |
| 118 | * |
| 119 | * @param Session $session |
| 120 | * @param UserIdentity $user |
| 121 | * @param string $returnTo |
| 122 | * @param string $returnToQuery |
| 123 | * @param string $returnToAnchor |
| 124 | * @param string &$redirectUrl |
| 125 | * @return bool |
| 126 | * |
| 127 | * @see SpecialCentralLogin |
| 128 | */ |
| 129 | public function onTempUserCreatedRedirect( |
| 130 | Session $session, |
| 131 | UserIdentity $user, |
| 132 | string $returnTo, |
| 133 | string $returnToQuery, |
| 134 | string $returnToAnchor, |
| 135 | &$redirectUrl |
| 136 | ) { |
| 137 | if ( !$this->config->get( 'CentralAuthLoginWiki' ) ) { |
| 138 | return true; |
| 139 | } |
| 140 | |
| 141 | $logger = LoggerFactory::getInstance( 'CentralAuth' ); |
| 142 | $centralUser = CentralAuthUser::getInstance( $user ); |
| 143 | |
| 144 | $logger->debug( 'CentralLogin triggered in TempUserCreatedRedirect' ); |
| 145 | $redirectUrl = $this->getRedirectUrl( |
| 146 | $session, |
| 147 | $centralUser, |
| 148 | $returnTo, |
| 149 | $returnToQuery, |
| 150 | $returnToAnchor, |
| 151 | 'signup' |
| 152 | ); |
| 153 | return false; |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Sets up central login so the caller can start it. |
| 158 | * - Stores a random-generated login secret, along with generic information about the |
| 159 | * user and the returnTo target, in the local session. |
| 160 | * - Composes an URL to the next step of the central login, Special:CentralLogin/start, and |
| 161 | * uses the token store and a query parameter in the URL to pass the secret, and information |
| 162 | * about the user and the session, in a secure way. |
| 163 | * - Returns the redirect URL. |
| 164 | * |
| 165 | * @param Session $session |
| 166 | * @param CentralAuthUser $centralUser |
| 167 | * @param string $returnTo |
| 168 | * @param string $returnToQuery |
| 169 | * @param string $returnToAnchor |
| 170 | * @param string $loginType 'signup' or the empty string for normal login |
| 171 | * @return string |
| 172 | * |
| 173 | * @see SpecialCentralLogin |
| 174 | */ |
| 175 | private function getRedirectUrl( |
| 176 | Session $session, |
| 177 | CentralAuthUser $centralUser, |
| 178 | $returnTo, |
| 179 | $returnToQuery, |
| 180 | $returnToAnchor, |
| 181 | $loginType |
| 182 | ) { |
| 183 | // User will be redirected to Special:CentralLogin/start (central wiki), |
| 184 | // then redirected back to Special:CentralLogin/complete (this wiki). |
| 185 | // Sanity check that "returnto" is not one of the central login pages. If it |
| 186 | // is, then clear the "returnto" options (LoginForm will use the main page). |
| 187 | $returnToTitle = Title::newFromText( $returnTo ); |
| 188 | if ( $returnToTitle && $returnToTitle->isSpecial( 'CentralLogin' ) ) { |
| 189 | $returnTo = ''; |
| 190 | $returnToQuery = ''; |
| 191 | } |
| 192 | |
| 193 | $remember = $session->shouldRememberUser(); |
| 194 | |
| 195 | // When POSTs triggered from Special:CentralLogin/start are sent back to |
| 196 | // this wiki, the token will be checked to see if it was signed with this. |
| 197 | // This is needed as Special:CentralLogin/start only takes a token argument |
| 198 | // and we need to make sure an agent requesting such a URL actually initiated |
| 199 | // the login request that spawned that token server-side. |
| 200 | $secret = MWCryptRand::generateHex( 32 ); |
| 201 | $session->set( 'CentralAuth:autologin:current-attempt', [ |
| 202 | 'secret' => $secret, |
| 203 | 'remember' => $remember, |
| 204 | 'returnTo' => $returnTo, |
| 205 | 'returnToQuery' => $returnToQuery, |
| 206 | 'returnToAnchor' => $returnToAnchor, |
| 207 | 'type' => $loginType |
| 208 | ] ); |
| 209 | |
| 210 | // Create a new token to pass to Special:CentralLogin/start (central wiki) |
| 211 | $tokenStore = $this->sessionManager->getTokenStore(); |
| 212 | $token = MWCryptRand::generateHex( 32 ); |
| 213 | $key = $this->sessionManager->makeTokenKey( 'central-login-start-token', $token ); |
| 214 | $data = [ |
| 215 | 'secret' => $secret, |
| 216 | 'name' => $centralUser->getName(), |
| 217 | 'guid' => $centralUser->getId(), |
| 218 | 'wikiId' => WikiMap::getCurrentWikiId(), |
| 219 | ]; |
| 220 | $this->caHookRunner->onCentralAuthLoginRedirectData( $centralUser, $data ); |
| 221 | $tokenStore->set( $key, $data, $tokenStore::TTL_MINUTE ); |
| 222 | |
| 223 | $query = [ 'token' => $token ]; |
| 224 | |
| 225 | $wiki = WikiMap::getWiki( $this->config->get( 'CentralAuthLoginWiki' ) ); |
| 226 | return wfAppendQuery( $wiki->getCanonicalUrl( 'Special:CentralLogin/start' ), $query ); |
| 227 | } |
| 228 | } |