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[mediawiki.git] / includes / auth / TemporaryPasswordPrimaryAuthenticationProvider.php

<?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
 * @ingroup Auth
 */

namespace MediaWiki\Auth;

use User;

/**
 * A primary authentication provider that uses the temporary password field in
 * the 'user' table.
 *
 * A successful login will force a password reset.
 *
 * @note For proper operation, this should generally come before any other
 *  password-based authentication providers.
 * @ingroup Auth
 * @since 1.27
 */
class TemporaryPasswordPrimaryAuthenticationProvider
        extends AbstractPasswordPrimaryAuthenticationProvider
{
        /** @var bool */
        protected $emailEnabled = null;

        /** @var int */
        protected $newPasswordExpiry = null;

        /** @var int */
        protected $passwordReminderResendTime = null;

        /**
         * @param array $params
         *  - emailEnabled: (bool) must be true for the option to email passwords to be present
         *  - newPasswordExpiry: (int) expiraton time of temporary passwords, in seconds
         *  - passwordReminderResendTime: (int) cooldown period in hours until a password reminder can
         *    be sent to the same user again,
         */
        public function __construct( $params = [] ) {
                parent::__construct( $params );

                if ( isset( $params['emailEnabled'] ) ) {
                        $this->emailEnabled = (bool)$params['emailEnabled'];
                }
                if ( isset( $params['newPasswordExpiry'] ) ) {
                        $this->newPasswordExpiry = (int)$params['newPasswordExpiry'];
                }
                if ( isset( $params['passwordReminderResendTime'] ) ) {
                        $this->passwordReminderResendTime = $params['passwordReminderResendTime'];
                }
        }

        public function setConfig( \Config $config ) {
                parent::setConfig( $config );

                if ( $this->emailEnabled === null ) {
                        $this->emailEnabled = $this->config->get( 'EnableEmail' );
                }
                if ( $this->newPasswordExpiry === null ) {
                        $this->newPasswordExpiry = $this->config->get( 'NewPasswordExpiry' );
                }
                if ( $this->passwordReminderResendTime === null ) {
                        $this->passwordReminderResendTime = $this->config->get( 'PasswordReminderResendTime' );
                }
        }

        protected function getPasswordResetData( $username, $data ) {
                // Always reset
                return (object)[
                        'msg' => wfMessage( 'resetpass-temp-emailed' ),
                        'hard' => true,
                ];
        }

        public function getAuthenticationRequests( $action, array $options ) {
                switch ( $action ) {
                        case AuthManager::ACTION_LOGIN:
                                return [ new PasswordAuthenticationRequest() ];

                        case AuthManager::ACTION_CHANGE:
                                return [ TemporaryPasswordAuthenticationRequest::newRandom() ];

                        case AuthManager::ACTION_CREATE:
                                if ( isset( $options['username'] ) && $this->emailEnabled ) {
                                        // Creating an account for someone else
                                        return [ TemporaryPasswordAuthenticationRequest::newRandom() ];
                                } else {
                                        // It's not terribly likely that an anonymous user will
                                        // be creating an account for someone else.
                                        return [];
                                }

                        case AuthManager::ACTION_REMOVE:
                                return [ new TemporaryPasswordAuthenticationRequest ];

                        default:
                                return [];
                }
        }

        public function beginPrimaryAuthentication( array $reqs ) {
                $req = AuthenticationRequest::getRequestByClass( $reqs, PasswordAuthenticationRequest::class );
                if ( !$req || $req->username === null || $req->password === null ) {
                        return AuthenticationResponse::newAbstain();
                }

                $username = User::getCanonicalName( $req->username, 'usable' );
                if ( $username === false ) {
                        return AuthenticationResponse::newAbstain();
                }

                $dbr = wfGetDB( DB_REPLICA );
                $row = $dbr->selectRow(
                        'user',
                        [
                                'user_id', 'user_newpassword', 'user_newpass_time',
                        ],
                        [ 'user_name' => $username ],
                        __METHOD__
                );
                if ( !$row ) {
                        return AuthenticationResponse::newAbstain();
                }

                $status = $this->checkPasswordValidity( $username, $req->password );
                if ( !$status->isOK() ) {
                        // Fatal, can't log in
                        return AuthenticationResponse::newFail( $status->getMessage() );
                }

                $pwhash = $this->getPassword( $row->user_newpassword );
                if ( !$pwhash->equals( $req->password ) ) {
                        return $this->failResponse( $req );
                }

                if ( !$this->isTimestampValid( $row->user_newpass_time ) ) {
                        return $this->failResponse( $req );
                }

                // Add an extra log entry since a temporary password is
                // an unusual way to log in, so its important to keep track
                // of in case of abuse.
                $this->logger->info( "{user} successfully logged in using temp password",
                        [
                                'user' => $username,
                                'requestIP' => $this->manager->getRequest()->getIP()
                        ]
                );

                $this->setPasswordResetFlag( $username, $status );

                return AuthenticationResponse::newPass( $username );
        }

        public function testUserCanAuthenticate( $username ) {
                $username = User::getCanonicalName( $username, 'usable' );
                if ( $username === false ) {
                        return false;
                }

                $dbr = wfGetDB( DB_REPLICA );
                $row = $dbr->selectRow(
                        'user',
                        [ 'user_newpassword', 'user_newpass_time' ],
                        [ 'user_name' => $username ],
                        __METHOD__
                );
                if ( !$row ) {
                        return false;
                }

                if ( $this->getPassword( $row->user_newpassword ) instanceof \InvalidPassword ) {
                        return false;
                }

                if ( !$this->isTimestampValid( $row->user_newpass_time ) ) {
                        return false;
                }

                return true;
        }

        public function testUserExists( $username, $flags = User::READ_NORMAL ) {
                $username = User::getCanonicalName( $username, 'usable' );
                if ( $username === false ) {
                        return false;
                }

                list( $db, $options ) = \DBAccessObjectUtils::getDBOptions( $flags );
                return (bool)wfGetDB( $db )->selectField(
                        [ 'user' ],
                        [ 'user_id' ],
                        [ 'user_name' => $username ],
                        __METHOD__,
                        $options
                );
        }

        public function providerAllowsAuthenticationDataChange(
                AuthenticationRequest $req, $checkData = true
        ) {
                if ( get_class( $req ) !== TemporaryPasswordAuthenticationRequest::class ) {
                        // We don't really ignore it, but this is what the caller expects.
                        return \StatusValue::newGood( 'ignored' );
                }

                if ( !$checkData ) {
                        return \StatusValue::newGood();
                }

                $username = User::getCanonicalName( $req->username, 'usable' );
                if ( $username === false ) {
                        return \StatusValue::newGood( 'ignored' );
                }

                $row = wfGetDB( DB_MASTER )->selectRow(
                        'user',
                        [ 'user_id', 'user_newpass_time' ],
                        [ 'user_name' => $username ],
                        __METHOD__
                );

                if ( !$row ) {
                        return \StatusValue::newGood( 'ignored' );
                }

                $sv = \StatusValue::newGood();
                if ( $req->password !== null ) {
                        $sv->merge( $this->checkPasswordValidity( $username, $req->password ) );

                        if ( $req->mailpassword ) {
                                if ( !$this->emailEnabled ) {
                                        return \StatusValue::newFatal( 'passwordreset-emaildisabled' );
                                }

                                // We don't check whether the user has an email address;
                                // that information should not be exposed to the caller.

                                // do not allow temporary password creation within
                                // $wgPasswordReminderResendTime from the last attempt
                                if (
                                        $this->passwordReminderResendTime
                                        && $row->user_newpass_time
                                        && time() < wfTimestamp( TS_UNIX, $row->user_newpass_time )
                                                + $this->passwordReminderResendTime * 3600
                                ) {
                                        // Round the time in hours to 3 d.p., in case someone is specifying
                                        // minutes or seconds.
                                        return \StatusValue::newFatal( 'throttled-mailpassword',
                                                round( $this->passwordReminderResendTime, 3 ) );
                                }

                                if ( !$req->caller ) {
                                        return \StatusValue::newFatal( 'passwordreset-nocaller' );
                                }
                                if ( !\IP::isValid( $req->caller ) ) {
                                        $caller = User::newFromName( $req->caller );
                                        if ( !$caller ) {
                                                return \StatusValue::newFatal( 'passwordreset-nosuchcaller', $req->caller );
                                        }
                                }
                        }
                }
                return $sv;
        }

        public function providerChangeAuthenticationData( AuthenticationRequest $req ) {
                $username = $req->username !== null ? User::getCanonicalName( $req->username, 'usable' ) : false;
                if ( $username === false ) {
                        return;
                }

                $dbw = wfGetDB( DB_MASTER );

                $sendMail = false;
                if ( $req->action !== AuthManager::ACTION_REMOVE &&
                        get_class( $req ) === TemporaryPasswordAuthenticationRequest::class
                ) {
                        $pwhash = $this->getPasswordFactory()->newFromPlaintext( $req->password );
                        $newpassTime = $dbw->timestamp();
                        $sendMail = $req->mailpassword;
                } else {
                        // Invalidate the temporary password when any other auth is reset, or when removing
                        $pwhash = $this->getPasswordFactory()->newFromCiphertext( null );
                        $newpassTime = null;
                }

                $dbw->update(
                        'user',
                        [
                                'user_newpassword' => $pwhash->toString(),
                                'user_newpass_time' => $newpassTime,
                        ],
                        [ 'user_name' => $username ],
                        __METHOD__
                );

                if ( $sendMail ) {
                        // Send email after DB commit
                        $dbw->onTransactionIdle(
                                function () use ( $req ) {
                                        /** @var TemporaryPasswordAuthenticationRequest $req */
                                        $this->sendPasswordResetEmail( $req );
                                },
                                __METHOD__
                        );
                }
        }

        public function accountCreationType() {
                return self::TYPE_CREATE;
        }

        public function testForAccountCreation( $user, $creator, array $reqs ) {
                /** @var TemporaryPasswordAuthenticationRequest $req */
                $req = AuthenticationRequest::getRequestByClass(
                        $reqs, TemporaryPasswordAuthenticationRequest::class
                );

                $ret = \StatusValue::newGood();
                if ( $req ) {
                        if ( $req->mailpassword ) {
                                if ( !$this->emailEnabled ) {
                                        $ret->merge( \StatusValue::newFatal( 'emaildisabled' ) );
                                } elseif ( !$user->getEmail() ) {
                                        $ret->merge( \StatusValue::newFatal( 'noemailcreate' ) );
                                }
                        }

                        $ret->merge(
                                $this->checkPasswordValidity( $user->getName(), $req->password )
                        );
                }
                return $ret;
        }

        public function beginPrimaryAccountCreation( $user, $creator, array $reqs ) {
                /** @var TemporaryPasswordAuthenticationRequest $req */
                $req = AuthenticationRequest::getRequestByClass(
                        $reqs, TemporaryPasswordAuthenticationRequest::class
                );
                if ( $req ) {
                        if ( $req->username !== null && $req->password !== null ) {
                                // Nothing we can do yet, because the user isn't in the DB yet
                                if ( $req->username !== $user->getName() ) {
                                        $req = clone( $req );
                                        $req->username = $user->getName();
                                }

                                if ( $req->mailpassword ) {
                                        // prevent EmailNotificationSecondaryAuthenticationProvider from sending another mail
                                        $this->manager->setAuthenticationSessionData( 'no-email', true );
                                }

                                $ret = AuthenticationResponse::newPass( $req->username );
                                $ret->createRequest = $req;
                                return $ret;
                        }
                }
                return AuthenticationResponse::newAbstain();
        }

        public function finishAccountCreation( $user, $creator, AuthenticationResponse $res ) {
                /** @var TemporaryPasswordAuthenticationRequest $req */
                $req = $res->createRequest;
                $mailpassword = $req->mailpassword;
                $req->mailpassword = false; // providerChangeAuthenticationData would send the wrong email

                // Now that the user is in the DB, set the password on it.
                $this->providerChangeAuthenticationData( $req );

                if ( $mailpassword ) {
                        // Send email after DB commit
                        wfGetDB( DB_MASTER )->onTransactionIdle(
                                function () use ( $user, $creator, $req ) {
                                        $this->sendNewAccountEmail( $user, $creator, $req->password );
                                },
                                __METHOD__
                        );
                }

                return $mailpassword ? 'byemail' : null;
        }

        /**
         * Check that a temporary password is still valid (hasn't expired).
         * @param string $timestamp A timestamp in MediaWiki (TS_MW) format
         * @return bool
         */
        protected function isTimestampValid( $timestamp ) {
                $time = wfTimestampOrNull( TS_MW, $timestamp );
                if ( $time !== null ) {
                        $expiry = wfTimestamp( TS_UNIX, $time ) + $this->newPasswordExpiry;
                        if ( time() >= $expiry ) {
                                return false;
                        }
                }
                return true;
        }

        /**
         * Send an email about the new account creation and the temporary password.
         * @param User $user The new user account
         * @param User $creatingUser The user who created the account (can be anonymous)
         * @param string $password The temporary password
         * @return \Status
         */
        protected function sendNewAccountEmail( User $user, User $creatingUser, $password ) {
                $ip = $creatingUser->getRequest()->getIP();
                // @codeCoverageIgnoreStart
                if ( !$ip ) {
                        return \Status::newFatal( 'badipaddress' );
                }
                // @codeCoverageIgnoreEnd

                \Hooks::run( 'User::mailPasswordInternal', [ &$creatingUser, &$ip, &$user ] );

                $mainPageUrl = \Title::newMainPage()->getCanonicalURL();
                $userLanguage = $user->getOption( 'language' );
                $subjectMessage = wfMessage( 'createaccount-title' )->inLanguage( $userLanguage );
                $bodyMessage = wfMessage( 'createaccount-text', $ip, $user->getName(), $password,
                        '<' . $mainPageUrl . '>', round( $this->newPasswordExpiry / 86400 ) )
                        ->inLanguage( $userLanguage );

                $status = $user->sendMail( $subjectMessage->text(), $bodyMessage->text() );

                // TODO show 'mailerror' message on error, 'accmailtext' success message otherwise?
                // @codeCoverageIgnoreStart
                if ( !$status->isGood() ) {
                        $this->logger->warning( 'Could not send account creation email: ' .
                                $status->getWikiText( false, false, 'en' ) );
                }
                // @codeCoverageIgnoreEnd

                return $status;
        }

        /**
         * @param TemporaryPasswordAuthenticationRequest $req
         * @return \Status
         */
        protected function sendPasswordResetEmail( TemporaryPasswordAuthenticationRequest $req ) {
                        $user = User::newFromName( $req->username );
                        if ( !$user ) {
                                return \Status::newFatal( 'noname' );
                        }
                        $userLanguage = $user->getOption( 'language' );
                        $callerIsAnon = \IP::isValid( $req->caller );
                        $callerName = $callerIsAnon ? $req->caller : User::newFromName( $req->caller )->getName();
                        $passwordMessage = wfMessage( 'passwordreset-emailelement', $user->getName(),
                                $req->password )->inLanguage( $userLanguage );
                        $emailMessage = wfMessage( $callerIsAnon ? 'passwordreset-emailtext-ip'
                                : 'passwordreset-emailtext-user' )->inLanguage( $userLanguage );
                        $emailMessage->params( $callerName, $passwordMessage->text(), 1,
                                '<' . \Title::newMainPage()->getCanonicalURL() . '>',
                                round( $this->newPasswordExpiry / 86400 ) );
                        $emailTitle = wfMessage( 'passwordreset-emailtitle' )->inLanguage( $userLanguage );
                        return $user->sendMail( $emailTitle->text(), $emailMessage->text() );
        }
}