summaryrefslogtreecommitdiff
path: root/includes/password/PasswordFactory.php
blob: 86a3fefd5887a01b41080179cc25eddbeedbecea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
<?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();
		}
	}
}