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<?php
/**
* Implements the Password class for the MediaWiki software.
*
* 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
*/
/**
* Factory class for creating and checking Password objects
*
* @since 1.24
*/
final class PasswordFactory {
/**
* The default PasswordHash type
*
* @var string
* @see PasswordFactory::setDefaultType
*/
private $default = '';
/**
* Mapping of password types to classes
* @var array
* @see PasswordFactory::register
* @see Setup.php
*/
private $types = array(
'' => array( 'type' => '', 'class' => 'InvalidPassword' ),
);
/**
* Register a new type of password hash
*
* @param string $type Unique type name for the hash
* @param array $config Array of configuration options
*/
public function register( $type, array $config ) {
$config['type'] = $type;
$this->types[$type] = $config;
}
/**
* Set the default password type
*
* @throws InvalidArgumentException If the type is not registered
* @param string $type Password hash type
*/
public function setDefaultType( $type ) {
if ( !isset( $this->types[$type] ) ) {
throw new InvalidArgumentException( "Invalid password type $type." );
}
$this->default = $type;
}
/**
* Get the default password type
*
* @return string
*/
public function getDefaultType() {
return $this->default;
}
/**
* Initialize the internal static variables using the global variables
*
* @param Config $config Configuration object to load data from
*/
public function init( Config $config ) {
foreach ( $config->get( 'PasswordConfig' ) as $type => $options ) {
$this->register( $type, $options );
}
$this->setDefaultType( $config->get( 'PasswordDefault' ) );
}
/**
* Get the list of types of passwords
*
* @return array
*/
public function getTypes() {
return $this->types;
}
/**
* Create a new Hash object from an existing string hash
*
* Parse the type of a hash and create a new hash object based on the parsed type.
* Pass the raw hash to the constructor of the new object. Use InvalidPassword type
* if a null hash is given.
*
* @param string|null $hash Existing hash or null for an invalid password
* @return Password
* @throws PasswordError If hash is invalid or type is not recognized
*/
public function newFromCiphertext( $hash ) {
if ( $hash === null || $hash === false || $hash === '' ) {
return new InvalidPassword( $this, array( 'type' => '' ), null );
} elseif ( $hash[0] !== ':' ) {
throw new PasswordError( 'Invalid hash given' );
}
$type = substr( $hash, 1, strpos( $hash, ':', 1 ) - 1 );
if ( !isset( $this->types[$type] ) ) {
throw new PasswordError( "Unrecognized password hash type $type." );
}
$config = $this->types[$type];
return new $config['class']( $this, $config, $hash );
}
/**
* Make a new default password of the given type.
*
* @param string $type Existing type
* @return Password
* @throws PasswordError If hash is invalid or type is not recognized
*/
public function newFromType( $type ) {
if ( !isset( $this->types[$type] ) ) {
throw new PasswordError( "Unrecognized password hash type $type." );
}
$config = $this->types[$type];
return new $config['class']( $this, $config );
}
/**
* Create a new Hash object from a plaintext password
*
* If no existing object is given, make a new default object. If one is given, clone that
* object. Then pass the plaintext to Password::crypt().
*
* @param string|null $password Plaintext password, or null for an invalid password
* @param Password|null $existing Optional existing hash to get options from
* @return Password
*/
public function newFromPlaintext( $password, Password $existing = null ) {
if ( $password === null ) {
return new InvalidPassword( $this, array( 'type' => '' ), null );
}
if ( $existing === null ) {
$config = $this->types[$this->default];
$obj = new $config['class']( $this, $config );
} else {
$obj = clone $existing;
}
$obj->crypt( $password );
return $obj;
}
/**
* Determine whether a password object needs updating
*
* Check whether the given password is of the default type. If it is,
* pass off further needsUpdate checks to Password::needsUpdate.
*
* @param Password $password
*
* @return bool True if needs update, false otherwise
*/
public function needsUpdate( Password $password ) {
if ( $password->getType() !== $this->default ) {
return true;
} else {
return $password->needsUpdate();
}
}
}
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