LocalPasswordPrimaryAuthenticationProvider.php

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<?php
namespace MediaWiki\Auth;

use User;

class LocalPasswordPrimaryAuthenticationProvider
    extends AbstractPasswordPrimaryAuthenticationProvider
{

    protected $loginOnly = false;

    public function __construct( $params = [] ) {
        parent::__construct( $params );
        $this->loginOnly = !empty( $params['loginOnly'] );
    }

    protected function getPasswordResetData( $username, $row ) {
        $now = wfTimestamp();
        $expiration = wfTimestampOrNull( TS_UNIX, $row->user_password_expires );
        if ( $expiration === null || $expiration >= $now ) {
            return null;
        }

        $grace = $this->config->get( 'PasswordExpireGrace' );
        if ( $expiration + $grace < $now ) {
            $data = [
                'hard' => true,
                'msg' => \Status::newFatal( 'resetpass-expired' )->getMessage(),
            ];
        } else {
            $data = [
                'hard' => false,
                'msg' => \Status::newFatal( 'resetpass-expired-soft' )->getMessage(),
            ];
        }

        return (object)$data;
    }

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

        if ( $req->username === null || $req->password === null ) {
            return AuthenticationResponse::newAbstain();
        }

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

        $fields = [
            'user_id', 'user_password', 'user_password_expires',
        ];

        $dbr = wfGetDB( DB_REPLICA );
        $row = $dbr->selectRow(
            'user',
            $fields,
            [ 'user_name' => $username ],
            __METHOD__
        );
        if ( !$row ) {
            // Do not reveal whether its bad username or
            // bad password to prevent username enumeration
            // on private wikis. (T134100)
            return $this->failResponse( $req );
        }

        $oldRow = clone $row;
        // Check for *really* old password hashes that don't even have a type
        // The old hash format was just an md5 hex hash, with no type information
        if ( preg_match( '/^[0-9a-f]{32}$/', $row->user_password ) ) {
            if ( $this->config->get( 'PasswordSalt' ) ) {
                $row->user_password = ":A:{$row->user_id}:{$row->user_password}";
            } else {
                $row->user_password = ":A:{$row->user_password}";
            }
        }

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

        $pwhash = $this->getPassword( $row->user_password );
        if ( !$pwhash->equals( $req->password ) ) {
            if ( $this->config->get( 'LegacyEncoding' ) ) {
                // Some wikis were converted from ISO 8859-1 to UTF-8, the passwords can't be converted
                // Check for this with iconv
                $cp1252Password = iconv( 'UTF-8', 'WINDOWS-1252//TRANSLIT', $req->password );
                if ( $cp1252Password === $req->password || !$pwhash->equals( $cp1252Password ) ) {
                    return $this->failResponse( $req );
                }
            } else {
                return $this->failResponse( $req );
            }
        }

        // @codeCoverageIgnoreStart
        if ( $this->getPasswordFactory()->needsUpdate( $pwhash ) ) {
            $pwhash = $this->getPasswordFactory()->newFromPlaintext( $req->password );
            \DeferredUpdates::addCallableUpdate( function () use ( $pwhash, $oldRow ) {
                $dbw = wfGetDB( DB_MASTER );
                $dbw->update(
                    'user',
                    [ 'user_password' => $pwhash->toString() ],
                    [
                        'user_id' => $oldRow->user_id,
                        'user_password' => $oldRow->user_password
                    ],
                    __METHOD__
                );
            } );
        }
        // @codeCoverageIgnoreEnd

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

        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_password' ],
            [ 'user_name' => $username ],
            __METHOD__
        );
        if ( !$row ) {
            return false;
        }

        // Check for *really* old password hashes that don't even have a type
        // The old hash format was just an md5 hex hash, with no type information
        if ( preg_match( '/^[0-9a-f]{32}$/', $row->user_password ) ) {
            return true;
        }

        return !$this->getPassword( $row->user_password ) instanceof \InvalidPassword;
    }

    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
    ) {
        // We only want to blank the password if something else will accept the
        // new authentication data, so return 'ignore' here.
        if ( $this->loginOnly ) {
            return \StatusValue::newGood( 'ignored' );
        }

        if ( get_class( $req ) === PasswordAuthenticationRequest::class ) {
            if ( !$checkData ) {
                return \StatusValue::newGood();
            }

            $username = User::getCanonicalName( $req->username, 'usable' );
            if ( $username !== false ) {
                $row = wfGetDB( DB_MASTER )->selectRow(
                    'user',
                    [ 'user_id' ],
                    [ 'user_name' => $username ],
                    __METHOD__
                );
                if ( $row ) {
                    $sv = \StatusValue::newGood();
                    if ( $req->password !== null ) {
                        if ( $req->password !== $req->retype ) {
                            $sv->fatal( 'badretype' );
                        } else {
                            $sv->merge( $this->checkPasswordValidity( $username, $req->password ) );
                        }
                    }
                    return $sv;
                }
            }
        }

        return \StatusValue::newGood( 'ignored' );
    }

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

        $pwhash = null;

        if ( $this->loginOnly ) {
            $pwhash = $this->getPasswordFactory()->newFromCiphertext( null );
            $expiry = null;
            // @codeCoverageIgnoreStart
        } elseif ( get_class( $req ) === PasswordAuthenticationRequest::class ) {
            // @codeCoverageIgnoreEnd
            $pwhash = $this->getPasswordFactory()->newFromPlaintext( $req->password );
            $expiry = $this->getNewPasswordExpiry( $username );
        }

        if ( $pwhash ) {
            $dbw = wfGetDB( DB_MASTER );
            $dbw->update(
                'user',
                [
                    'user_password' => $pwhash->toString(),
                    'user_password_expires' => $dbw->timestampOrNull( $expiry ),
                ],
                [ 'user_name' => $username ],
                __METHOD__
            );
        }
    }

    public function accountCreationType() {
        return $this->loginOnly ? self::TYPE_NONE : self::TYPE_CREATE;
    }

    public function testForAccountCreation( $user, $creator, array $reqs ) {
        $req = AuthenticationRequest::getRequestByClass( $reqs, PasswordAuthenticationRequest::class );

        $ret = \StatusValue::newGood();
        if ( !$this->loginOnly && $req && $req->username !== null && $req->password !== null ) {
            if ( $req->password !== $req->retype ) {
                $ret->fatal( 'badretype' );
            } else {
                $ret->merge(
                    $this->checkPasswordValidity( $user->getName(), $req->password )
                );
            }
        }
        return $ret;
    }

    public function beginPrimaryAccountCreation( $user, $creator, array $reqs ) {
        if ( $this->accountCreationType() === self::TYPE_NONE ) {
            throw new \BadMethodCallException( 'Shouldn\'t call this when accountCreationType() is NONE' );
        }

        $req = AuthenticationRequest::getRequestByClass( $reqs, PasswordAuthenticationRequest::class );
        if ( $req ) {
            if ( $req->username !== null && $req->password !== null ) {
                // Nothing we can do besides claim it, because the user isn't in
                // the DB yet
                if ( $req->username !== $user->getName() ) {
                    $req = clone( $req );
                    $req->username = $user->getName();
                }
                $ret = AuthenticationResponse::newPass( $req->username );
                $ret->createRequest = $req;
                return $ret;
            }
        }
        return AuthenticationResponse::newAbstain();
    }

    public function finishAccountCreation( $user, $creator, AuthenticationResponse $res ) {
        if ( $this->accountCreationType() === self::TYPE_NONE ) {
            throw new \BadMethodCallException( 'Shouldn\'t call this when accountCreationType() is NONE' );
        }

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

        return null;
    }
}