worker / src / PHPSecLib / Crypt / AES.php

AES.php in ManageWP Worker 4.9.25, at src/PHPSecLib/Crypt/AES.php

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1	<?php
2
3	/**
4	* Pure-PHP implementation of AES.
5	*
6	* Uses mcrypt, if available/possible, and an internal implementation, otherwise.
7	*
8	* PHP versions 4 and 5
9	*
10	* If {@link Crypt_AES::setKeyLength() setKeyLength()} isn't called, it'll be calculated from
11	* {@link Crypt_AES::setKey() setKey()}. ie. if the key is 128-bits, the key length will be 128-bits. If it's 136-bits
12	* it'll be null-padded to 192-bits and 192 bits will be the key length until {@link Crypt_AES::setKey() setKey()}
13	* is called, again, at which point, it'll be recalculated.
14	*
15	* Since Crypt_AES extends Crypt_Rijndael, some functions are available to be called that, in the context of AES, don't
16	* make a whole lot of sense. {@link Crypt_AES::setBlockLength() setBlockLength()}, for instance. Calling that function,
17	* however possible, won't do anything (AES has a fixed block length whereas Rijndael has a variable one).
18	*
19	* Here's a short example of how to use this library:
20	* <code>
21	* <?php
22	* include 'Crypt/AES.php';
23	*
24	* $aes = new Crypt_AES();
25	*
26	* $aes->setKey('abcdefghijklmnop');
27	*
28	* $size = 10 * 1024;
29	* $plaintext = '';
30	* for ($i = 0; $i < $size; $i++) {
31	* $plaintext.= 'a';
32	* }
33	*
34	* echo $aes->decrypt($aes->encrypt($plaintext));
35	* ?>
36	* </code>
37	*
38	* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
39	* of this software and associated documentation files (the "Software"), to deal
40	* in the Software without restriction, including without limitation the rights
41	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
42	* copies of the Software, and to permit persons to whom the Software is
43	* furnished to do so, subject to the following conditions:
44	*
45	* The above copyright notice and this permission notice shall be included in
46	* all copies or substantial portions of the Software.
47	*
48	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
49	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
50	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
51	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
52	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
53	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
54	* THE SOFTWARE.
55	*
56	* @category Crypt
57	* @package Crypt_AES
58	* @author Jim Wigginton <terrafrost@php.net>
59	* @copyright MMVIII Jim Wigginton
60	* @license http://www.opensource.org/licenses/mit-license.html MIT License
61	* @link http://phpseclib.sourceforge.net
62	*/
63
64	/**
65	* Include Crypt_Rijndael
66	*/
67	if (!class_exists('Crypt_Rijndael')) {
68	require_once dirname(__FILE__).'/Rijndael.php';
69	}
70
71	/**#@+
72	* @access public
73	* @see Crypt_AES::encrypt()
74	* @see Crypt_AES::decrypt()
75	*/
76	/**
77	* Encrypt / decrypt using the Counter mode.
78	*
79	* Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.
80	*
81	* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29
82	*/
83	define('CRYPT_AES_MODE_CTR', CRYPT_MODE_CTR);
84	/**
85	* Encrypt / decrypt using the Electronic Code Book mode.
86	*
87	* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29
88	*/
89	define('CRYPT_AES_MODE_ECB', CRYPT_MODE_ECB);
90	/**
91	* Encrypt / decrypt using the Code Book Chaining mode.
92	*
93	* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29
94	*/
95	define('CRYPT_AES_MODE_CBC', CRYPT_MODE_CBC);
96	/**
97	* Encrypt / decrypt using the Cipher Feedback mode.
98	*
99	* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher_feedback_.28CFB.29
100	*/
101	define('CRYPT_AES_MODE_CFB', CRYPT_MODE_CFB);
102	/**
103	* Encrypt / decrypt using the Cipher Feedback mode.
104	*
105	* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Output_feedback_.28OFB.29
106	*/
107	define('CRYPT_AES_MODE_OFB', CRYPT_MODE_OFB);
108	/*#@-/
109
110	/**#@+
111	* @access private
112	* @see Crypt_Base::Crypt_Base()
113	*/
114	/**
115	* Toggles the internal implementation
116	*/
117	define('CRYPT_AES_MODE_INTERNAL', CRYPT_MODE_INTERNAL);
118	/**
119	* Toggles the mcrypt implementation
120	*/
121	define('CRYPT_AES_MODE_MCRYPT', CRYPT_MODE_MCRYPT);
122	/*#@-/
123
124	/**
125	* Pure-PHP implementation of AES.
126	*
127	* @package Crypt_AES
128	* @author Jim Wigginton <terrafrost@php.net>
129	* @access public
130	*/
131	class Crypt_AES extends Crypt_Rijndael
132	{
133	/**
134	* The namespace used by the cipher for its constants.
135	*
136	* @see Crypt_Base::const_namespace
137	* @var String
138	* @access private
139	*/
140	public $const_namespace = 'AES';
141
142	/**
143	* Dummy function
144	*
145	* Since Crypt_AES extends Crypt_Rijndael, this function is, technically, available, but it doesn't do anything.
146	*
147	* @see Crypt_Rijndael::setBlockLength()
148	* @access public
149	*
150	* @param Integer $length
151	*/
152	public function setBlockLength($length)
153	{
154	return;
155	}
156	}
157