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<?php
/**
* MediaWiki session info
*
* 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 Session
*/
namespace MediaWiki\Session;
/**
* Value object returned by SessionProvider
*
* This holds the data necessary to construct a Session.
*
* @ingroup Session
* @since 1.27
*/
class SessionInfo {
/** Minimum allowed priority */
const MIN_PRIORITY = 1;
/** Maximum allowed priority */
const MAX_PRIORITY = 100;
/** @var SessionProvider|null */
private $provider;
/** @var string */
private $id;
/** @var int */
private $priority;
/** @var UserInfo|null */
private $userInfo = null;
private $persisted = false;
private $remembered = false;
private $forceHTTPS = false;
private $idIsSafe = false;
private $forceUse = false;
/** @var array|null */
private $providerMetadata = null;
/**
* @param int $priority Session priority
* @param array $data
* - provider: (SessionProvider|null) If not given, the provider will be
* determined from the saved session data.
* - id: (string|null) Session ID
* - userInfo: (UserInfo|null) User known from the request. If
* $provider->canChangeUser() is false, a verified user
* must be provided.
* - persisted: (bool) Whether this session was persisted
* - remembered: (bool) Whether the verified user was remembered.
* Defaults to true.
* - forceHTTPS: (bool) Whether to force HTTPS for this session
* - metadata: (array) Provider metadata, to be returned by
* Session::getProviderMetadata().
* - idIsSafe: (bool) Set true if the 'id' did not come from the user.
* Generally you'll use this from SessionProvider::newEmptySession(),
* and not from any other method.
* - forceUse: (bool) Set true if the 'id' is from
* SessionProvider::hashToSessionId() to delete conflicting session
* store data instead of discarding this SessionInfo. Ignored unless
* both 'provider' and 'id' are given.
* - copyFrom: (SessionInfo) SessionInfo to copy other data items from.
*/
public function __construct( $priority, array $data ) {
if ( $priority < self::MIN_PRIORITY || $priority > self::MAX_PRIORITY ) {
throw new \InvalidArgumentException( 'Invalid priority' );
}
if ( isset( $data['copyFrom'] ) ) {
$from = $data['copyFrom'];
if ( !$from instanceof SessionInfo ) {
throw new \InvalidArgumentException( 'Invalid copyFrom' );
}
$data += [
'provider' => $from->provider,
'id' => $from->id,
'userInfo' => $from->userInfo,
'persisted' => $from->persisted,
'remembered' => $from->remembered,
'forceHTTPS' => $from->forceHTTPS,
'metadata' => $from->providerMetadata,
'idIsSafe' => $from->idIsSafe,
'forceUse' => $from->forceUse,
// @codeCoverageIgnoreStart
];
// @codeCoverageIgnoreEnd
} else {
$data += [
'provider' => null,
'id' => null,
'userInfo' => null,
'persisted' => false,
'remembered' => true,
'forceHTTPS' => false,
'metadata' => null,
'idIsSafe' => false,
'forceUse' => false,
// @codeCoverageIgnoreStart
];
// @codeCoverageIgnoreEnd
}
if ( $data['id'] !== null && !SessionManager::validateSessionId( $data['id'] ) ) {
throw new \InvalidArgumentException( 'Invalid session ID' );
}
if ( $data['userInfo'] !== null && !$data['userInfo'] instanceof UserInfo ) {
throw new \InvalidArgumentException( 'Invalid userInfo' );
}
if ( !$data['provider'] && $data['id'] === null ) {
throw new \InvalidArgumentException(
'Must supply an ID when no provider is given'
);
}
if ( $data['metadata'] !== null && !is_array( $data['metadata'] ) ) {
throw new \InvalidArgumentException( 'Invalid metadata' );
}
$this->provider = $data['provider'];
if ( $data['id'] !== null ) {
$this->id = $data['id'];
$this->idIsSafe = $data['idIsSafe'];
$this->forceUse = $data['forceUse'] && $this->provider;
} else {
$this->id = $this->provider->getManager()->generateSessionId();
$this->idIsSafe = true;
$this->forceUse = false;
}
$this->priority = (int)$priority;
$this->userInfo = $data['userInfo'];
$this->persisted = (bool)$data['persisted'];
if ( $data['provider'] !== null ) {
if ( $this->userInfo !== null && !$this->userInfo->isAnon() && $this->userInfo->isVerified() ) {
$this->remembered = (bool)$data['remembered'];
}
$this->providerMetadata = $data['metadata'];
}
$this->forceHTTPS = (bool)$data['forceHTTPS'];
}
/**
* Return the provider
* @return SessionProvider|null
*/
final public function getProvider() {
return $this->provider;
}
/**
* Return the session ID
* @return string
*/
final public function getId() {
return $this->id;
}
/**
* Indicate whether the ID is "safe"
*
* The ID is safe in the following cases:
* - The ID was randomly generated by the constructor.
* - The ID was found in the backend data store.
* - $this->getProvider()->persistsSessionId() is false.
* - The constructor was explicitly told it's safe using the 'idIsSafe'
* parameter.
*
* @return bool
*/
final public function isIdSafe() {
return $this->idIsSafe;
}
/**
* Force use of this SessionInfo if validation fails
*
* The normal behavior is to discard the SessionInfo if validation against
* the data stored in the session store fails. If this returns true,
* SessionManager will instead delete the session store data so this
* SessionInfo may still be used.
*
* @return bool
*/
final public function forceUse() {
return $this->forceUse;
}
/**
* Return the priority
* @return int
*/
final public function getPriority() {
return $this->priority;
}
/**
* Return the user
* @return UserInfo|null
*/
final public function getUserInfo() {
return $this->userInfo;
}
/**
* Return whether the session is persisted
* @return bool
*/
final public function wasPersisted() {
return $this->persisted;
}
/**
* Return provider metadata
* @return array|null
*/
final public function getProviderMetadata() {
return $this->providerMetadata;
}
/**
* Return whether the user was remembered
*
* For providers that can persist the user separately from the session,
* the human using it may not actually *want* that to be done. For example,
* a cookie-based provider can set cookies that are longer-lived than the
* backend session data, but on a public terminal the human likely doesn't
* want those cookies set.
*
* This is false unless a non-anonymous verified user was passed to
* the SessionInfo constructor by the provider, and the provider didn't
* pass false for the 'remembered' data item.
*
* @return bool
*/
final public function wasRemembered() {
return $this->remembered;
}
/**
* Whether this session should only be used over HTTPS
* @return bool
*/
final public function forceHTTPS() {
return $this->forceHTTPS;
}
public function __toString() {
return '[' . $this->getPriority() . ']' .
( $this->getProvider() ?: 'null' ) .
( $this->userInfo ?: '<null>' ) . $this->getId();
}
/**
* Compare two SessionInfo objects by priority
* @param SessionInfo $a
* @param SessionInfo $b
* @return int Negative if $a < $b, positive if $a > $b, zero if equal
*/
public static function compare( $a, $b ) {
return $a->getPriority() - $b->getPriority();
}
}