Version Description
- 05/21/2012 =
- Removed CloudFront method; I have no way of testing this
- Backup all tables found in the database that have this site's table prefix
- If encryption fails, then abort (don't revert to not encrypting)
- Added ability to decrypt encrypted database backups
- Added ability to opt out of backing up each file group
- Now adds database character set, the lack of which before made database backups unusable without modifications
- Version number bump to make sure that this is an improvement on the original Updraft, and is now tried and tested
Download this release
Release Info
Developer | DavidAnderson |
Plugin | UpdraftPlus WordPress Backup Plugin |
Version | 0.7.4 |
Comparing to | |
See all releases |
Version 0.7.4
- example-decrypt.php +41 -0
- includes/Rijndael.php +1424 -0
- includes/S3.php +1365 -0
- includes/ftp.class.php +193 -0
- includes/updraft-restorer.php +62 -0
- readme.txt +94 -0
- screenshot-1.png +0 -0
- updraftplus.php +1501 -0
example-decrypt.php
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<?php
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/*
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To dump the decrypted file using the given key on stdout, call:
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rijndael_decrypt_file( '../path/to/file.crypt' , 'mykey' );
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Thus, here are the easy instructions:
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1) Add a line like the above into this PHP file (not inside these comments, but outside)
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e.g.
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rijndael_decrypt_file( '/home/myself/myfile.crypt' , 'MYKEY' );
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2) Run this file (and make sure that includes/Rijndael.php is available, if you are moving this file around)
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e.g.
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php /home/myself/example-decrypt.php >output.sql.gz
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3) You may then want to gunzip the resulting file to have a standard SQL file.
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e.g.
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gunzip output.sql.gz
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*/
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function rijndael_decrypt_file($file, $key) {
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require_once(dirname(__FILE__).'/includes/Rijndael.php');
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$rijndael = new Crypt_Rijndael();
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$rijndael->setKey($key);
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$in_handle = fopen($file,'r');
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$ciphertext = "";
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while (!feof ($in_handle)) {
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$ciphertext .= fread($in_handle, 16384);
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}
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fclose ($in_handle);
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print $rijndael->decrypt($ciphertext);
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}
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?>
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includes/Rijndael.php
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1 |
+
<?php
|
2 |
+
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
3 |
+
|
4 |
+
/**
|
5 |
+
* Pure-PHP implementation of Rijndael.
|
6 |
+
*
|
7 |
+
* Does not use mcrypt, even when available, for reasons that are explained below.
|
8 |
+
*
|
9 |
+
* PHP versions 4 and 5
|
10 |
+
*
|
11 |
+
* If {@link Crypt_Rijndael::setBlockLength() setBlockLength()} isn't called, it'll be assumed to be 128 bits. If
|
12 |
+
* {@link Crypt_Rijndael::setKeyLength() setKeyLength()} isn't called, it'll be calculated from
|
13 |
+
* {@link Crypt_Rijndael::setKey() setKey()}. ie. if the key is 128-bits, the key length will be 128-bits. If it's
|
14 |
+
* 136-bits it'll be null-padded to 160-bits and 160 bits will be the key length until
|
15 |
+
* {@link Crypt_Rijndael::setKey() setKey()} is called, again, at which point, it'll be recalculated.
|
16 |
+
*
|
17 |
+
* Not all Rijndael implementations may support 160-bits or 224-bits as the block length / key length. mcrypt, for example,
|
18 |
+
* does not. AES, itself, only supports block lengths of 128 and key lengths of 128, 192, and 256.
|
19 |
+
* {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=10 Rijndael-ammended.pdf#page=10} defines the
|
20 |
+
* algorithm for block lengths of 192 and 256 but not for block lengths / key lengths of 160 and 224. Indeed, 160 and 224
|
21 |
+
* are first defined as valid key / block lengths in
|
22 |
+
* {@link http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=44 Rijndael-ammended.pdf#page=44}:
|
23 |
+
* Extensions: Other block and Cipher Key lengths.
|
24 |
+
*
|
25 |
+
* {@internal The variable names are the same as those in
|
26 |
+
* {@link http://www.csrc.nist.gov/publications/fips/fips197/fips-197.pdf#page=10 fips-197.pdf#page=10}.}}
|
27 |
+
*
|
28 |
+
* Here's a short example of how to use this library:
|
29 |
+
* <code>
|
30 |
+
* <?php
|
31 |
+
* include('Crypt/Rijndael.php');
|
32 |
+
*
|
33 |
+
* $rijndael = new Crypt_Rijndael();
|
34 |
+
*
|
35 |
+
* $rijndael->setKey('abcdefghijklmnop');
|
36 |
+
*
|
37 |
+
* $size = 10 * 1024;
|
38 |
+
* $plaintext = '';
|
39 |
+
* for ($i = 0; $i < $size; $i++) {
|
40 |
+
* $plaintext.= 'a';
|
41 |
+
* }
|
42 |
+
*
|
43 |
+
* echo $rijndael->decrypt($rijndael->encrypt($plaintext));
|
44 |
+
* ?>
|
45 |
+
* </code>
|
46 |
+
*
|
47 |
+
* LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy
|
48 |
+
* of this software and associated documentation files (the "Software"), to deal
|
49 |
+
* in the Software without restriction, including without limitation the rights
|
50 |
+
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
51 |
+
* copies of the Software, and to permit persons to whom the Software is
|
52 |
+
* furnished to do so, subject to the following conditions:
|
53 |
+
*
|
54 |
+
* The above copyright notice and this permission notice shall be included in
|
55 |
+
* all copies or substantial portions of the Software.
|
56 |
+
*
|
57 |
+
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
58 |
+
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
59 |
+
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
60 |
+
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
61 |
+
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
62 |
+
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
63 |
+
* THE SOFTWARE.
|
64 |
+
*
|
65 |
+
* @category Crypt
|
66 |
+
* @package Crypt_Rijndael
|
67 |
+
* @author Jim Wigginton <terrafrost@php.net>
|
68 |
+
* @copyright MMVIII Jim Wigginton
|
69 |
+
* @license http://www.opensource.org/licenses/mit-license.html MIT License
|
70 |
+
* @version $Id: Rijndael.php,v 1.12 2010/02/09 06:10:26 terrafrost Exp $
|
71 |
+
* @link http://phpseclib.sourceforge.net
|
72 |
+
*/
|
73 |
+
|
74 |
+
/**#@+
|
75 |
+
* @access public
|
76 |
+
* @see Crypt_Rijndael::encrypt()
|
77 |
+
* @see Crypt_Rijndael::decrypt()
|
78 |
+
*/
|
79 |
+
/**
|
80 |
+
* Encrypt / decrypt using the Counter mode.
|
81 |
+
*
|
82 |
+
* Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.
|
83 |
+
*
|
84 |
+
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29
|
85 |
+
*/
|
86 |
+
define('CRYPT_RIJNDAEL_MODE_CTR', -1);
|
87 |
+
/**
|
88 |
+
* Encrypt / decrypt using the Electronic Code Book mode.
|
89 |
+
*
|
90 |
+
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29
|
91 |
+
*/
|
92 |
+
define('CRYPT_RIJNDAEL_MODE_ECB', 1);
|
93 |
+
/**
|
94 |
+
* Encrypt / decrypt using the Code Book Chaining mode.
|
95 |
+
*
|
96 |
+
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29
|
97 |
+
*/
|
98 |
+
define('CRYPT_RIJNDAEL_MODE_CBC', 2);
|
99 |
+
/**
|
100 |
+
* Encrypt / decrypt using the Cipher Feedback mode.
|
101 |
+
*
|
102 |
+
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher_feedback_.28CFB.29
|
103 |
+
*/
|
104 |
+
define('CRYPT_RIJNDAEL_MODE_CFB', 3);
|
105 |
+
/**
|
106 |
+
* Encrypt / decrypt using the Cipher Feedback mode.
|
107 |
+
*
|
108 |
+
* @link http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Output_feedback_.28OFB.29
|
109 |
+
*/
|
110 |
+
define('CRYPT_RIJNDAEL_MODE_OFB', 4);
|
111 |
+
/**#@-*/
|
112 |
+
|
113 |
+
/**#@+
|
114 |
+
* @access private
|
115 |
+
* @see Crypt_Rijndael::Crypt_Rijndael()
|
116 |
+
*/
|
117 |
+
/**
|
118 |
+
* Toggles the internal implementation
|
119 |
+
*/
|
120 |
+
define('CRYPT_RIJNDAEL_MODE_INTERNAL', 1);
|
121 |
+
/**
|
122 |
+
* Toggles the mcrypt implementation
|
123 |
+
*/
|
124 |
+
define('CRYPT_RIJNDAEL_MODE_MCRYPT', 2);
|
125 |
+
/**#@-*/
|
126 |
+
|
127 |
+
/**
|
128 |
+
* Pure-PHP implementation of Rijndael.
|
129 |
+
*
|
130 |
+
* @author Jim Wigginton <terrafrost@php.net>
|
131 |
+
* @version 0.1.0
|
132 |
+
* @access public
|
133 |
+
* @package Crypt_Rijndael
|
134 |
+
*/
|
135 |
+
class Crypt_Rijndael {
|
136 |
+
/**
|
137 |
+
* The Encryption Mode
|
138 |
+
*
|
139 |
+
* @see Crypt_Rijndael::Crypt_Rijndael()
|
140 |
+
* @var Integer
|
141 |
+
* @access private
|
142 |
+
*/
|
143 |
+
var $mode;
|
144 |
+
|
145 |
+
/**
|
146 |
+
* The Key
|
147 |
+
*
|
148 |
+
* @see Crypt_Rijndael::setKey()
|
149 |
+
* @var String
|
150 |
+
* @access private
|
151 |
+
*/
|
152 |
+
var $key = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
|
153 |
+
|
154 |
+
/**
|
155 |
+
* The Initialization Vector
|
156 |
+
*
|
157 |
+
* @see Crypt_Rijndael::setIV()
|
158 |
+
* @var String
|
159 |
+
* @access private
|
160 |
+
*/
|
161 |
+
var $iv = '';
|
162 |
+
|
163 |
+
/**
|
164 |
+
* A "sliding" Initialization Vector
|
165 |
+
*
|
166 |
+
* @see Crypt_Rijndael::enableContinuousBuffer()
|
167 |
+
* @var String
|
168 |
+
* @access private
|
169 |
+
*/
|
170 |
+
var $encryptIV = '';
|
171 |
+
|
172 |
+
/**
|
173 |
+
* A "sliding" Initialization Vector
|
174 |
+
*
|
175 |
+
* @see Crypt_Rijndael::enableContinuousBuffer()
|
176 |
+
* @var String
|
177 |
+
* @access private
|
178 |
+
*/
|
179 |
+
var $decryptIV = '';
|
180 |
+
|
181 |
+
/**
|
182 |
+
* Continuous Buffer status
|
183 |
+
*
|
184 |
+
* @see Crypt_Rijndael::enableContinuousBuffer()
|
185 |
+
* @var Boolean
|
186 |
+
* @access private
|
187 |
+
*/
|
188 |
+
var $continuousBuffer = false;
|
189 |
+
|
190 |
+
/**
|
191 |
+
* Padding status
|
192 |
+
*
|
193 |
+
* @see Crypt_Rijndael::enablePadding()
|
194 |
+
* @var Boolean
|
195 |
+
* @access private
|
196 |
+
*/
|
197 |
+
var $padding = true;
|
198 |
+
|
199 |
+
/**
|
200 |
+
* Does the key schedule need to be (re)calculated?
|
201 |
+
*
|
202 |
+
* @see setKey()
|
203 |
+
* @see setBlockLength()
|
204 |
+
* @see setKeyLength()
|
205 |
+
* @var Boolean
|
206 |
+
* @access private
|
207 |
+
*/
|
208 |
+
var $changed = true;
|
209 |
+
|
210 |
+
/**
|
211 |
+
* Has the key length explicitly been set or should it be derived from the key, itself?
|
212 |
+
*
|
213 |
+
* @see setKeyLength()
|
214 |
+
* @var Boolean
|
215 |
+
* @access private
|
216 |
+
*/
|
217 |
+
var $explicit_key_length = false;
|
218 |
+
|
219 |
+
/**
|
220 |
+
* The Key Schedule
|
221 |
+
*
|
222 |
+
* @see _setup()
|
223 |
+
* @var Array
|
224 |
+
* @access private
|
225 |
+
*/
|
226 |
+
var $w;
|
227 |
+
|
228 |
+
/**
|
229 |
+
* The Inverse Key Schedule
|
230 |
+
*
|
231 |
+
* @see _setup()
|
232 |
+
* @var Array
|
233 |
+
* @access private
|
234 |
+
*/
|
235 |
+
var $dw;
|
236 |
+
|
237 |
+
/**
|
238 |
+
* The Block Length
|
239 |
+
*
|
240 |
+
* @see setBlockLength()
|
241 |
+
* @var Integer
|
242 |
+
* @access private
|
243 |
+
* @internal The max value is 32, the min value is 16. All valid values are multiples of 4. Exists in conjunction with
|
244 |
+
* $Nb because we need this value and not $Nb to pad strings appropriately.
|
245 |
+
*/
|
246 |
+
var $block_size = 16;
|
247 |
+
|
248 |
+
/**
|
249 |
+
* The Block Length divided by 32
|
250 |
+
*
|
251 |
+
* @see setBlockLength()
|
252 |
+
* @var Integer
|
253 |
+
* @access private
|
254 |
+
* @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4. Exists in conjunction with $block_size
|
255 |
+
* because the encryption / decryption / key schedule creation requires this number and not $block_size. We could
|
256 |
+
* derive this from $block_size or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu
|
257 |
+
* of that, we'll just precompute it once.
|
258 |
+
*
|
259 |
+
*/
|
260 |
+
var $Nb = 4;
|
261 |
+
|
262 |
+
/**
|
263 |
+
* The Key Length
|
264 |
+
*
|
265 |
+
* @see setKeyLength()
|
266 |
+
* @var Integer
|
267 |
+
* @access private
|
268 |
+
* @internal The max value is 256 / 8 = 32, the min value is 128 / 8 = 16. Exists in conjunction with $key_size
|
269 |
+
* because the encryption / decryption / key schedule creation requires this number and not $key_size. We could
|
270 |
+
* derive this from $key_size or vice versa, but that'd mean we'd have to do multiple shift operations, so in lieu
|
271 |
+
* of that, we'll just precompute it once.
|
272 |
+
*/
|
273 |
+
var $key_size = 16;
|
274 |
+
|
275 |
+
/**
|
276 |
+
* The Key Length divided by 32
|
277 |
+
*
|
278 |
+
* @see setKeyLength()
|
279 |
+
* @var Integer
|
280 |
+
* @access private
|
281 |
+
* @internal The max value is 256 / 32 = 8, the min value is 128 / 32 = 4
|
282 |
+
*/
|
283 |
+
var $Nk = 4;
|
284 |
+
|
285 |
+
/**
|
286 |
+
* The Number of Rounds
|
287 |
+
*
|
288 |
+
* @var Integer
|
289 |
+
* @access private
|
290 |
+
* @internal The max value is 14, the min value is 10.
|
291 |
+
*/
|
292 |
+
var $Nr;
|
293 |
+
|
294 |
+
/**
|
295 |
+
* Shift offsets
|
296 |
+
*
|
297 |
+
* @var Array
|
298 |
+
* @access private
|
299 |
+
*/
|
300 |
+
var $c;
|
301 |
+
|
302 |
+
/**
|
303 |
+
* Precomputed mixColumns table
|
304 |
+
*
|
305 |
+
* @see Crypt_Rijndael()
|
306 |
+
* @var Array
|
307 |
+
* @access private
|
308 |
+
*/
|
309 |
+
var $t0;
|
310 |
+
|
311 |
+
/**
|
312 |
+
* Precomputed mixColumns table
|
313 |
+
*
|
314 |
+
* @see Crypt_Rijndael()
|
315 |
+
* @var Array
|
316 |
+
* @access private
|
317 |
+
*/
|
318 |
+
var $t1;
|
319 |
+
|
320 |
+
/**
|
321 |
+
* Precomputed mixColumns table
|
322 |
+
*
|
323 |
+
* @see Crypt_Rijndael()
|
324 |
+
* @var Array
|
325 |
+
* @access private
|
326 |
+
*/
|
327 |
+
var $t2;
|
328 |
+
|
329 |
+
/**
|
330 |
+
* Precomputed mixColumns table
|
331 |
+
*
|
332 |
+
* @see Crypt_Rijndael()
|
333 |
+
* @var Array
|
334 |
+
* @access private
|
335 |
+
*/
|
336 |
+
var $t3;
|
337 |
+
|
338 |
+
/**
|
339 |
+
* Precomputed invMixColumns table
|
340 |
+
*
|
341 |
+
* @see Crypt_Rijndael()
|
342 |
+
* @var Array
|
343 |
+
* @access private
|
344 |
+
*/
|
345 |
+
var $dt0;
|
346 |
+
|
347 |
+
/**
|
348 |
+
* Precomputed invMixColumns table
|
349 |
+
*
|
350 |
+
* @see Crypt_Rijndael()
|
351 |
+
* @var Array
|
352 |
+
* @access private
|
353 |
+
*/
|
354 |
+
var $dt1;
|
355 |
+
|
356 |
+
/**
|
357 |
+
* Precomputed invMixColumns table
|
358 |
+
*
|
359 |
+
* @see Crypt_Rijndael()
|
360 |
+
* @var Array
|
361 |
+
* @access private
|
362 |
+
*/
|
363 |
+
var $dt2;
|
364 |
+
|
365 |
+
/**
|
366 |
+
* Precomputed invMixColumns table
|
367 |
+
*
|
368 |
+
* @see Crypt_Rijndael()
|
369 |
+
* @var Array
|
370 |
+
* @access private
|
371 |
+
*/
|
372 |
+
var $dt3;
|
373 |
+
|
374 |
+
/**
|
375 |
+
* Is the mode one that is paddable?
|
376 |
+
*
|
377 |
+
* @see Crypt_Rijndael::Crypt_Rijndael()
|
378 |
+
* @var Boolean
|
379 |
+
* @access private
|
380 |
+
*/
|
381 |
+
var $paddable = false;
|
382 |
+
|
383 |
+
/**
|
384 |
+
* Encryption buffer for CTR, OFB and CFB modes
|
385 |
+
*
|
386 |
+
* @see Crypt_Rijndael::encrypt()
|
387 |
+
* @var String
|
388 |
+
* @access private
|
389 |
+
*/
|
390 |
+
var $enbuffer = array('encrypted' => '', 'xor' => '');
|
391 |
+
|
392 |
+
/**
|
393 |
+
* Decryption buffer for CTR, OFB and CFB modes
|
394 |
+
*
|
395 |
+
* @see Crypt_Rijndael::decrypt()
|
396 |
+
* @var String
|
397 |
+
* @access private
|
398 |
+
*/
|
399 |
+
var $debuffer = array('ciphertext' => '');
|
400 |
+
|
401 |
+
/**
|
402 |
+
* Default Constructor.
|
403 |
+
*
|
404 |
+
* Determines whether or not the mcrypt extension should be used. $mode should only, at present, be
|
405 |
+
* CRYPT_RIJNDAEL_MODE_ECB or CRYPT_RIJNDAEL_MODE_CBC. If not explictly set, CRYPT_RIJNDAEL_MODE_CBC will be used.
|
406 |
+
*
|
407 |
+
* @param optional Integer $mode
|
408 |
+
* @return Crypt_Rijndael
|
409 |
+
* @access public
|
410 |
+
*/
|
411 |
+
function Crypt_Rijndael($mode = CRYPT_RIJNDAEL_MODE_CBC)
|
412 |
+
{
|
413 |
+
switch ($mode) {
|
414 |
+
case CRYPT_RIJNDAEL_MODE_ECB:
|
415 |
+
case CRYPT_RIJNDAEL_MODE_CBC:
|
416 |
+
$this->paddable = true;
|
417 |
+
$this->mode = $mode;
|
418 |
+
break;
|
419 |
+
case CRYPT_RIJNDAEL_MODE_CTR:
|
420 |
+
case CRYPT_RIJNDAEL_MODE_CFB:
|
421 |
+
case CRYPT_RIJNDAEL_MODE_OFB:
|
422 |
+
$this->mode = $mode;
|
423 |
+
break;
|
424 |
+
default:
|
425 |
+
$this->paddable = true;
|
426 |
+
$this->mode = CRYPT_RIJNDAEL_MODE_CBC;
|
427 |
+
}
|
428 |
+
|
429 |
+
$t3 = &$this->t3;
|
430 |
+
$t2 = &$this->t2;
|
431 |
+
$t1 = &$this->t1;
|
432 |
+
$t0 = &$this->t0;
|
433 |
+
|
434 |
+
$dt3 = &$this->dt3;
|
435 |
+
$dt2 = &$this->dt2;
|
436 |
+
$dt1 = &$this->dt1;
|
437 |
+
$dt0 = &$this->dt0;
|
438 |
+
|
439 |
+
// according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=19> (section 5.2.1),
|
440 |
+
// precomputed tables can be used in the mixColumns phase. in that example, they're assigned t0...t3, so
|
441 |
+
// those are the names we'll use.
|
442 |
+
$t3 = array(
|
443 |
+
0x6363A5C6, 0x7C7C84F8, 0x777799EE, 0x7B7B8DF6, 0xF2F20DFF, 0x6B6BBDD6, 0x6F6FB1DE, 0xC5C55491,
|
444 |
+
0x30305060, 0x01010302, 0x6767A9CE, 0x2B2B7D56, 0xFEFE19E7, 0xD7D762B5, 0xABABE64D, 0x76769AEC,
|
445 |
+
0xCACA458F, 0x82829D1F, 0xC9C94089, 0x7D7D87FA, 0xFAFA15EF, 0x5959EBB2, 0x4747C98E, 0xF0F00BFB,
|
446 |
+
0xADADEC41, 0xD4D467B3, 0xA2A2FD5F, 0xAFAFEA45, 0x9C9CBF23, 0xA4A4F753, 0x727296E4, 0xC0C05B9B,
|
447 |
+
0xB7B7C275, 0xFDFD1CE1, 0x9393AE3D, 0x26266A4C, 0x36365A6C, 0x3F3F417E, 0xF7F702F5, 0xCCCC4F83,
|
448 |
+
0x34345C68, 0xA5A5F451, 0xE5E534D1, 0xF1F108F9, 0x717193E2, 0xD8D873AB, 0x31315362, 0x15153F2A,
|
449 |
+
0x04040C08, 0xC7C75295, 0x23236546, 0xC3C35E9D, 0x18182830, 0x9696A137, 0x05050F0A, 0x9A9AB52F,
|
450 |
+
0x0707090E, 0x12123624, 0x80809B1B, 0xE2E23DDF, 0xEBEB26CD, 0x2727694E, 0xB2B2CD7F, 0x75759FEA,
|
451 |
+
0x09091B12, 0x83839E1D, 0x2C2C7458, 0x1A1A2E34, 0x1B1B2D36, 0x6E6EB2DC, 0x5A5AEEB4, 0xA0A0FB5B,
|
452 |
+
0x5252F6A4, 0x3B3B4D76, 0xD6D661B7, 0xB3B3CE7D, 0x29297B52, 0xE3E33EDD, 0x2F2F715E, 0x84849713,
|
453 |
+
0x5353F5A6, 0xD1D168B9, 0x00000000, 0xEDED2CC1, 0x20206040, 0xFCFC1FE3, 0xB1B1C879, 0x5B5BEDB6,
|
454 |
+
0x6A6ABED4, 0xCBCB468D, 0xBEBED967, 0x39394B72, 0x4A4ADE94, 0x4C4CD498, 0x5858E8B0, 0xCFCF4A85,
|
455 |
+
0xD0D06BBB, 0xEFEF2AC5, 0xAAAAE54F, 0xFBFB16ED, 0x4343C586, 0x4D4DD79A, 0x33335566, 0x85859411,
|
456 |
+
0x4545CF8A, 0xF9F910E9, 0x02020604, 0x7F7F81FE, 0x5050F0A0, 0x3C3C4478, 0x9F9FBA25, 0xA8A8E34B,
|
457 |
+
0x5151F3A2, 0xA3A3FE5D, 0x4040C080, 0x8F8F8A05, 0x9292AD3F, 0x9D9DBC21, 0x38384870, 0xF5F504F1,
|
458 |
+
0xBCBCDF63, 0xB6B6C177, 0xDADA75AF, 0x21216342, 0x10103020, 0xFFFF1AE5, 0xF3F30EFD, 0xD2D26DBF,
|
459 |
+
0xCDCD4C81, 0x0C0C1418, 0x13133526, 0xECEC2FC3, 0x5F5FE1BE, 0x9797A235, 0x4444CC88, 0x1717392E,
|
460 |
+
0xC4C45793, 0xA7A7F255, 0x7E7E82FC, 0x3D3D477A, 0x6464ACC8, 0x5D5DE7BA, 0x19192B32, 0x737395E6,
|
461 |
+
0x6060A0C0, 0x81819819, 0x4F4FD19E, 0xDCDC7FA3, 0x22226644, 0x2A2A7E54, 0x9090AB3B, 0x8888830B,
|
462 |
+
0x4646CA8C, 0xEEEE29C7, 0xB8B8D36B, 0x14143C28, 0xDEDE79A7, 0x5E5EE2BC, 0x0B0B1D16, 0xDBDB76AD,
|
463 |
+
0xE0E03BDB, 0x32325664, 0x3A3A4E74, 0x0A0A1E14, 0x4949DB92, 0x06060A0C, 0x24246C48, 0x5C5CE4B8,
|
464 |
+
0xC2C25D9F, 0xD3D36EBD, 0xACACEF43, 0x6262A6C4, 0x9191A839, 0x9595A431, 0xE4E437D3, 0x79798BF2,
|
465 |
+
0xE7E732D5, 0xC8C8438B, 0x3737596E, 0x6D6DB7DA, 0x8D8D8C01, 0xD5D564B1, 0x4E4ED29C, 0xA9A9E049,
|
466 |
+
0x6C6CB4D8, 0x5656FAAC, 0xF4F407F3, 0xEAEA25CF, 0x6565AFCA, 0x7A7A8EF4, 0xAEAEE947, 0x08081810,
|
467 |
+
0xBABAD56F, 0x787888F0, 0x25256F4A, 0x2E2E725C, 0x1C1C2438, 0xA6A6F157, 0xB4B4C773, 0xC6C65197,
|
468 |
+
0xE8E823CB, 0xDDDD7CA1, 0x74749CE8, 0x1F1F213E, 0x4B4BDD96, 0xBDBDDC61, 0x8B8B860D, 0x8A8A850F,
|
469 |
+
0x707090E0, 0x3E3E427C, 0xB5B5C471, 0x6666AACC, 0x4848D890, 0x03030506, 0xF6F601F7, 0x0E0E121C,
|
470 |
+
0x6161A3C2, 0x35355F6A, 0x5757F9AE, 0xB9B9D069, 0x86869117, 0xC1C15899, 0x1D1D273A, 0x9E9EB927,
|
471 |
+
0xE1E138D9, 0xF8F813EB, 0x9898B32B, 0x11113322, 0x6969BBD2, 0xD9D970A9, 0x8E8E8907, 0x9494A733,
|
472 |
+
0x9B9BB62D, 0x1E1E223C, 0x87879215, 0xE9E920C9, 0xCECE4987, 0x5555FFAA, 0x28287850, 0xDFDF7AA5,
|
473 |
+
0x8C8C8F03, 0xA1A1F859, 0x89898009, 0x0D0D171A, 0xBFBFDA65, 0xE6E631D7, 0x4242C684, 0x6868B8D0,
|
474 |
+
0x4141C382, 0x9999B029, 0x2D2D775A, 0x0F0F111E, 0xB0B0CB7B, 0x5454FCA8, 0xBBBBD66D, 0x16163A2C
|
475 |
+
);
|
476 |
+
|
477 |
+
$dt3 = array(
|
478 |
+
0xF4A75051, 0x4165537E, 0x17A4C31A, 0x275E963A, 0xAB6BCB3B, 0x9D45F11F, 0xFA58ABAC, 0xE303934B,
|
479 |
+
0x30FA5520, 0x766DF6AD, 0xCC769188, 0x024C25F5, 0xE5D7FC4F, 0x2ACBD7C5, 0x35448026, 0x62A38FB5,
|
480 |
+
0xB15A49DE, 0xBA1B6725, 0xEA0E9845, 0xFEC0E15D, 0x2F7502C3, 0x4CF01281, 0x4697A38D, 0xD3F9C66B,
|
481 |
+
0x8F5FE703, 0x929C9515, 0x6D7AEBBF, 0x5259DA95, 0xBE832DD4, 0x7421D358, 0xE0692949, 0xC9C8448E,
|
482 |
+
0xC2896A75, 0x8E7978F4, 0x583E6B99, 0xB971DD27, 0xE14FB6BE, 0x88AD17F0, 0x20AC66C9, 0xCE3AB47D,
|
483 |
+
0xDF4A1863, 0x1A3182E5, 0x51336097, 0x537F4562, 0x6477E0B1, 0x6BAE84BB, 0x81A01CFE, 0x082B94F9,
|
484 |
+
0x48685870, 0x45FD198F, 0xDE6C8794, 0x7BF8B752, 0x73D323AB, 0x4B02E272, 0x1F8F57E3, 0x55AB2A66,
|
485 |
+
0xEB2807B2, 0xB5C2032F, 0xC57B9A86, 0x3708A5D3, 0x2887F230, 0xBFA5B223, 0x036ABA02, 0x16825CED,
|
486 |
+
0xCF1C2B8A, 0x79B492A7, 0x07F2F0F3, 0x69E2A14E, 0xDAF4CD65, 0x05BED506, 0x34621FD1, 0xA6FE8AC4,
|
487 |
+
0x2E539D34, 0xF355A0A2, 0x8AE13205, 0xF6EB75A4, 0x83EC390B, 0x60EFAA40, 0x719F065E, 0x6E1051BD,
|
488 |
+
0x218AF93E, 0xDD063D96, 0x3E05AEDD, 0xE6BD464D, 0x548DB591, 0xC45D0571, 0x06D46F04, 0x5015FF60,
|
489 |
+
0x98FB2419, 0xBDE997D6, 0x4043CC89, 0xD99E7767, 0xE842BDB0, 0x898B8807, 0x195B38E7, 0xC8EEDB79,
|
490 |
+
0x7C0A47A1, 0x420FE97C, 0x841EC9F8, 0x00000000, 0x80868309, 0x2BED4832, 0x1170AC1E, 0x5A724E6C,
|
491 |
+
0x0EFFFBFD, 0x8538560F, 0xAED51E3D, 0x2D392736, 0x0FD9640A, 0x5CA62168, 0x5B54D19B, 0x362E3A24,
|
492 |
+
0x0A67B10C, 0x57E70F93, 0xEE96D2B4, 0x9B919E1B, 0xC0C54F80, 0xDC20A261, 0x774B695A, 0x121A161C,
|
493 |
+
0x93BA0AE2, 0xA02AE5C0, 0x22E0433C, 0x1B171D12, 0x090D0B0E, 0x8BC7ADF2, 0xB6A8B92D, 0x1EA9C814,
|
494 |
+
0xF1198557, 0x75074CAF, 0x99DDBBEE, 0x7F60FDA3, 0x01269FF7, 0x72F5BC5C, 0x663BC544, 0xFB7E345B,
|
495 |
+
0x4329768B, 0x23C6DCCB, 0xEDFC68B6, 0xE4F163B8, 0x31DCCAD7, 0x63851042, 0x97224013, 0xC6112084,
|
496 |
+
0x4A247D85, 0xBB3DF8D2, 0xF93211AE, 0x29A16DC7, 0x9E2F4B1D, 0xB230F3DC, 0x8652EC0D, 0xC1E3D077,
|
497 |
+
0xB3166C2B, 0x70B999A9, 0x9448FA11, 0xE9642247, 0xFC8CC4A8, 0xF03F1AA0, 0x7D2CD856, 0x3390EF22,
|
498 |
+
0x494EC787, 0x38D1C1D9, 0xCAA2FE8C, 0xD40B3698, 0xF581CFA6, 0x7ADE28A5, 0xB78E26DA, 0xADBFA43F,
|
499 |
+
0x3A9DE42C, 0x78920D50, 0x5FCC9B6A, 0x7E466254, 0x8D13C2F6, 0xD8B8E890, 0x39F75E2E, 0xC3AFF582,
|
500 |
+
0x5D80BE9F, 0xD0937C69, 0xD52DA96F, 0x2512B3CF, 0xAC993BC8, 0x187DA710, 0x9C636EE8, 0x3BBB7BDB,
|
501 |
+
0x267809CD, 0x5918F46E, 0x9AB701EC, 0x4F9AA883, 0x956E65E6, 0xFFE67EAA, 0xBCCF0821, 0x15E8E6EF,
|
502 |
+
0xE79BD9BA, 0x6F36CE4A, 0x9F09D4EA, 0xB07CD629, 0xA4B2AF31, 0x3F23312A, 0xA59430C6, 0xA266C035,
|
503 |
+
0x4EBC3774, 0x82CAA6FC, 0x90D0B0E0, 0xA7D81533, 0x04984AF1, 0xECDAF741, 0xCD500E7F, 0x91F62F17,
|
504 |
+
0x4DD68D76, 0xEFB04D43, 0xAA4D54CC, 0x9604DFE4, 0xD1B5E39E, 0x6A881B4C, 0x2C1FB8C1, 0x65517F46,
|
505 |
+
0x5EEA049D, 0x8C355D01, 0x877473FA, 0x0B412EFB, 0x671D5AB3, 0xDBD25292, 0x105633E9, 0xD647136D,
|
506 |
+
0xD7618C9A, 0xA10C7A37, 0xF8148E59, 0x133C89EB, 0xA927EECE, 0x61C935B7, 0x1CE5EDE1, 0x47B13C7A,
|
507 |
+
0xD2DF599C, 0xF2733F55, 0x14CE7918, 0xC737BF73, 0xF7CDEA53, 0xFDAA5B5F, 0x3D6F14DF, 0x44DB8678,
|
508 |
+
0xAFF381CA, 0x68C43EB9, 0x24342C38, 0xA3405FC2, 0x1DC37216, 0xE2250CBC, 0x3C498B28, 0x0D9541FF,
|
509 |
+
0xA8017139, 0x0CB3DE08, 0xB4E49CD8, 0x56C19064, 0xCB84617B, 0x32B670D5, 0x6C5C7448, 0xB85742D0
|
510 |
+
);
|
511 |
+
|
512 |
+
for ($i = 0; $i < 256; $i++) {
|
513 |
+
$t2[$i << 8] = (($t3[$i] << 8) & 0xFFFFFF00) | (($t3[$i] >> 24) & 0x000000FF);
|
514 |
+
$t1[$i << 16] = (($t3[$i] << 16) & 0xFFFF0000) | (($t3[$i] >> 16) & 0x0000FFFF);
|
515 |
+
$t0[$i << 24] = (($t3[$i] << 24) & 0xFF000000) | (($t3[$i] >> 8) & 0x00FFFFFF);
|
516 |
+
|
517 |
+
$dt2[$i << 8] = (($this->dt3[$i] << 8) & 0xFFFFFF00) | (($dt3[$i] >> 24) & 0x000000FF);
|
518 |
+
$dt1[$i << 16] = (($this->dt3[$i] << 16) & 0xFFFF0000) | (($dt3[$i] >> 16) & 0x0000FFFF);
|
519 |
+
$dt0[$i << 24] = (($this->dt3[$i] << 24) & 0xFF000000) | (($dt3[$i] >> 8) & 0x00FFFFFF);
|
520 |
+
}
|
521 |
+
}
|
522 |
+
|
523 |
+
/**
|
524 |
+
* Sets the key.
|
525 |
+
*
|
526 |
+
* Keys can be of any length. Rijndael, itself, requires the use of a key that's between 128-bits and 256-bits long and
|
527 |
+
* whose length is a multiple of 32. If the key is less than 256-bits and the key length isn't set, we round the length
|
528 |
+
* up to the closest valid key length, padding $key with null bytes. If the key is more than 256-bits, we trim the
|
529 |
+
* excess bits.
|
530 |
+
*
|
531 |
+
* If the key is not explicitly set, it'll be assumed to be all null bytes.
|
532 |
+
*
|
533 |
+
* @access public
|
534 |
+
* @param String $key
|
535 |
+
*/
|
536 |
+
function setKey($key)
|
537 |
+
{
|
538 |
+
$this->key = $key;
|
539 |
+
$this->changed = true;
|
540 |
+
}
|
541 |
+
|
542 |
+
/**
|
543 |
+
* Sets the initialization vector. (optional)
|
544 |
+
*
|
545 |
+
* SetIV is not required when CRYPT_RIJNDAEL_MODE_ECB is being used. If not explictly set, it'll be assumed
|
546 |
+
* to be all zero's.
|
547 |
+
*
|
548 |
+
* @access public
|
549 |
+
* @param String $iv
|
550 |
+
*/
|
551 |
+
function setIV($iv)
|
552 |
+
{
|
553 |
+
$this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($iv, 0, $this->block_size), $this->block_size, chr(0));;
|
554 |
+
}
|
555 |
+
|
556 |
+
/**
|
557 |
+
* Sets the key length
|
558 |
+
*
|
559 |
+
* Valid key lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to
|
560 |
+
* 128. If the length is greater then 128 and invalid, it will be rounded down to the closest valid amount.
|
561 |
+
*
|
562 |
+
* @access public
|
563 |
+
* @param Integer $length
|
564 |
+
*/
|
565 |
+
function setKeyLength($length)
|
566 |
+
{
|
567 |
+
$length >>= 5;
|
568 |
+
if ($length > 8) {
|
569 |
+
$length = 8;
|
570 |
+
} else if ($length < 4) {
|
571 |
+
$length = 4;
|
572 |
+
}
|
573 |
+
$this->Nk = $length;
|
574 |
+
$this->key_size = $length << 2;
|
575 |
+
|
576 |
+
$this->explicit_key_length = true;
|
577 |
+
$this->changed = true;
|
578 |
+
}
|
579 |
+
|
580 |
+
/**
|
581 |
+
* Sets the block length
|
582 |
+
*
|
583 |
+
* Valid block lengths are 128, 160, 192, 224, and 256. If the length is less than 128, it will be rounded up to
|
584 |
+
* 128. If the length is greater then 128 and invalid, it will be rounded down to the closest valid amount.
|
585 |
+
*
|
586 |
+
* @access public
|
587 |
+
* @param Integer $length
|
588 |
+
*/
|
589 |
+
function setBlockLength($length)
|
590 |
+
{
|
591 |
+
$length >>= 5;
|
592 |
+
if ($length > 8) {
|
593 |
+
$length = 8;
|
594 |
+
} else if ($length < 4) {
|
595 |
+
$length = 4;
|
596 |
+
}
|
597 |
+
$this->Nb = $length;
|
598 |
+
$this->block_size = $length << 2;
|
599 |
+
$this->changed = true;
|
600 |
+
}
|
601 |
+
|
602 |
+
/**
|
603 |
+
* Generate CTR XOR encryption key
|
604 |
+
*
|
605 |
+
* Encrypt the output of this and XOR it against the ciphertext / plaintext to get the
|
606 |
+
* plaintext / ciphertext in CTR mode.
|
607 |
+
*
|
608 |
+
* @see Crypt_Rijndael::decrypt()
|
609 |
+
* @see Crypt_Rijndael::encrypt()
|
610 |
+
* @access public
|
611 |
+
* @param Integer $length
|
612 |
+
* @param String $iv
|
613 |
+
*/
|
614 |
+
function _generate_xor($length, &$iv)
|
615 |
+
{
|
616 |
+
$xor = '';
|
617 |
+
$block_size = $this->block_size;
|
618 |
+
$num_blocks = floor(($length + ($block_size - 1)) / $block_size);
|
619 |
+
for ($i = 0; $i < $num_blocks; $i++) {
|
620 |
+
$xor.= $iv;
|
621 |
+
for ($j = 4; $j <= $block_size; $j+=4) {
|
622 |
+
$temp = substr($iv, -$j, 4);
|
623 |
+
switch ($temp) {
|
624 |
+
case "\xFF\xFF\xFF\xFF":
|
625 |
+
$iv = substr_replace($iv, "\x00\x00\x00\x00", -$j, 4);
|
626 |
+
break;
|
627 |
+
case "\x7F\xFF\xFF\xFF":
|
628 |
+
$iv = substr_replace($iv, "\x80\x00\x00\x00", -$j, 4);
|
629 |
+
break 2;
|
630 |
+
default:
|
631 |
+
extract(unpack('Ncount', $temp));
|
632 |
+
$iv = substr_replace($iv, pack('N', $count + 1), -$j, 4);
|
633 |
+
break 2;
|
634 |
+
}
|
635 |
+
}
|
636 |
+
}
|
637 |
+
|
638 |
+
return $xor;
|
639 |
+
}
|
640 |
+
|
641 |
+
/**
|
642 |
+
* Encrypts a message.
|
643 |
+
*
|
644 |
+
* $plaintext will be padded with additional bytes such that it's length is a multiple of the block size. Other Rjindael
|
645 |
+
* implementations may or may not pad in the same manner. Other common approaches to padding and the reasons why it's
|
646 |
+
* necessary are discussed in the following
|
647 |
+
* URL:
|
648 |
+
*
|
649 |
+
* {@link http://www.di-mgt.com.au/cryptopad.html http://www.di-mgt.com.au/cryptopad.html}
|
650 |
+
*
|
651 |
+
* An alternative to padding is to, separately, send the length of the file. This is what SSH, in fact, does.
|
652 |
+
* strlen($plaintext) will still need to be a multiple of 8, however, arbitrary values can be added to make it that
|
653 |
+
* length.
|
654 |
+
*
|
655 |
+
* @see Crypt_Rijndael::decrypt()
|
656 |
+
* @access public
|
657 |
+
* @param String $plaintext
|
658 |
+
*/
|
659 |
+
function encrypt($plaintext)
|
660 |
+
{
|
661 |
+
$this->_setup();
|
662 |
+
if ($this->paddable) {
|
663 |
+
$plaintext = $this->_pad($plaintext);
|
664 |
+
}
|
665 |
+
|
666 |
+
$block_size = $this->block_size;
|
667 |
+
$buffer = &$this->enbuffer;
|
668 |
+
$continuousBuffer = $this->continuousBuffer;
|
669 |
+
$ciphertext = '';
|
670 |
+
switch ($this->mode) {
|
671 |
+
case CRYPT_RIJNDAEL_MODE_ECB:
|
672 |
+
for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
|
673 |
+
$ciphertext.= $this->_encryptBlock(substr($plaintext, $i, $block_size));
|
674 |
+
}
|
675 |
+
break;
|
676 |
+
case CRYPT_RIJNDAEL_MODE_CBC:
|
677 |
+
$xor = $this->encryptIV;
|
678 |
+
for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
|
679 |
+
$block = substr($plaintext, $i, $block_size);
|
680 |
+
$block = $this->_encryptBlock($block ^ $xor);
|
681 |
+
$xor = $block;
|
682 |
+
$ciphertext.= $block;
|
683 |
+
}
|
684 |
+
if ($this->continuousBuffer) {
|
685 |
+
$this->encryptIV = $xor;
|
686 |
+
}
|
687 |
+
break;
|
688 |
+
case CRYPT_RIJNDAEL_MODE_CTR:
|
689 |
+
$xor = $this->encryptIV;
|
690 |
+
if (!empty($buffer)) {
|
691 |
+
for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
|
692 |
+
$block = substr($plaintext, $i, $block_size);
|
693 |
+
$buffer.= $this->_encryptBlock($this->_generate_xor($block_size, $xor));
|
694 |
+
$key = $this->_string_shift($buffer, $block_size);
|
695 |
+
$ciphertext.= $block ^ $key;
|
696 |
+
}
|
697 |
+
} else {
|
698 |
+
for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
|
699 |
+
$block = substr($plaintext, $i, $block_size);
|
700 |
+
$key = $this->_encryptBlock($this->_generate_xor($block_size, $xor));
|
701 |
+
$ciphertext.= $block ^ $key;
|
702 |
+
}
|
703 |
+
}
|
704 |
+
if ($this->continuousBuffer) {
|
705 |
+
$this->encryptIV = $xor;
|
706 |
+
if ($start = strlen($plaintext) % $block_size) {
|
707 |
+
$buffer = substr($key, $start) . $buffer;
|
708 |
+
}
|
709 |
+
}
|
710 |
+
break;
|
711 |
+
case CRYPT_RIJNDAEL_MODE_CFB:
|
712 |
+
if (!empty($buffer['xor'])) {
|
713 |
+
$ciphertext = $plaintext ^ $buffer['xor'];
|
714 |
+
$iv = $buffer['encrypted'] . $ciphertext;
|
715 |
+
$start = strlen($ciphertext);
|
716 |
+
$buffer['encrypted'].= $ciphertext;
|
717 |
+
$buffer['xor'] = substr($buffer['xor'], strlen($ciphertext));
|
718 |
+
} else {
|
719 |
+
$ciphertext = '';
|
720 |
+
$iv = $this->encryptIV;
|
721 |
+
$start = 0;
|
722 |
+
}
|
723 |
+
|
724 |
+
for ($i = $start; $i < strlen($plaintext); $i+=$block_size) {
|
725 |
+
$block = substr($plaintext, $i, $block_size);
|
726 |
+
$xor = $this->_encryptBlock($iv);
|
727 |
+
$iv = $block ^ $xor;
|
728 |
+
if ($continuousBuffer && strlen($iv) != $block_size) {
|
729 |
+
$buffer = array(
|
730 |
+
'encrypted' => $iv,
|
731 |
+
'xor' => substr($xor, strlen($iv))
|
732 |
+
);
|
733 |
+
}
|
734 |
+
$ciphertext.= $iv;
|
735 |
+
}
|
736 |
+
|
737 |
+
if ($this->continuousBuffer) {
|
738 |
+
$this->encryptIV = $iv;
|
739 |
+
}
|
740 |
+
break;
|
741 |
+
case CRYPT_RIJNDAEL_MODE_OFB:
|
742 |
+
$xor = $this->encryptIV;
|
743 |
+
if (strlen($buffer)) {
|
744 |
+
for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
|
745 |
+
$xor = $this->_encryptBlock($xor);
|
746 |
+
$buffer.= $xor;
|
747 |
+
$key = $this->_string_shift($buffer, $block_size);
|
748 |
+
$ciphertext.= substr($plaintext, $i, $block_size) ^ $key;
|
749 |
+
}
|
750 |
+
} else {
|
751 |
+
for ($i = 0; $i < strlen($plaintext); $i+=$block_size) {
|
752 |
+
$xor = $this->_encryptBlock($xor);
|
753 |
+
$ciphertext.= substr($plaintext, $i, $block_size) ^ $xor;
|
754 |
+
}
|
755 |
+
$key = $xor;
|
756 |
+
}
|
757 |
+
if ($this->continuousBuffer) {
|
758 |
+
$this->encryptIV = $xor;
|
759 |
+
if ($start = strlen($plaintext) % $block_size) {
|
760 |
+
$buffer = substr($key, $start) . $buffer;
|
761 |
+
}
|
762 |
+
}
|
763 |
+
}
|
764 |
+
|
765 |
+
return $ciphertext;
|
766 |
+
}
|
767 |
+
|
768 |
+
/**
|
769 |
+
* Decrypts a message.
|
770 |
+
*
|
771 |
+
* If strlen($ciphertext) is not a multiple of the block size, null bytes will be added to the end of the string until
|
772 |
+
* it is.
|
773 |
+
*
|
774 |
+
* @see Crypt_Rijndael::encrypt()
|
775 |
+
* @access public
|
776 |
+
* @param String $ciphertext
|
777 |
+
*/
|
778 |
+
function decrypt($ciphertext)
|
779 |
+
{
|
780 |
+
$this->_setup();
|
781 |
+
|
782 |
+
if ($this->paddable) {
|
783 |
+
// we pad with chr(0) since that's what mcrypt_generic does. to quote from http://php.net/function.mcrypt-generic :
|
784 |
+
// "The data is padded with "\0" to make sure the length of the data is n * blocksize."
|
785 |
+
$ciphertext = str_pad($ciphertext, strlen($ciphertext) + ($this->block_size - strlen($ciphertext) % $this->block_size) % $this->block_size, chr(0));
|
786 |
+
}
|
787 |
+
|
788 |
+
$block_size = $this->block_size;
|
789 |
+
$buffer = &$this->debuffer;
|
790 |
+
$continuousBuffer = $this->continuousBuffer;
|
791 |
+
$plaintext = '';
|
792 |
+
switch ($this->mode) {
|
793 |
+
case CRYPT_RIJNDAEL_MODE_ECB:
|
794 |
+
for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
|
795 |
+
$plaintext.= $this->_decryptBlock(substr($ciphertext, $i, $block_size));
|
796 |
+
}
|
797 |
+
break;
|
798 |
+
case CRYPT_RIJNDAEL_MODE_CBC:
|
799 |
+
$xor = $this->decryptIV;
|
800 |
+
for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
|
801 |
+
$block = substr($ciphertext, $i, $block_size);
|
802 |
+
$plaintext.= $this->_decryptBlock($block) ^ $xor;
|
803 |
+
$xor = $block;
|
804 |
+
}
|
805 |
+
if ($this->continuousBuffer) {
|
806 |
+
$this->decryptIV = $xor;
|
807 |
+
}
|
808 |
+
break;
|
809 |
+
case CRYPT_RIJNDAEL_MODE_CTR:
|
810 |
+
$xor = $this->decryptIV;
|
811 |
+
if (strlen($buffer)) {
|
812 |
+
for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
|
813 |
+
$block = substr($ciphertext, $i, $block_size);
|
814 |
+
$buffer.= $this->_encryptBlock($this->_generate_xor($block_size, $xor));
|
815 |
+
$key = $this->_string_shift($buffer, $block_size);
|
816 |
+
$plaintext.= $block ^ $key;
|
817 |
+
}
|
818 |
+
} else {
|
819 |
+
for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
|
820 |
+
$block = substr($ciphertext, $i, $block_size);
|
821 |
+
$key = $this->_encryptBlock($this->_generate_xor($block_size, $xor));
|
822 |
+
$plaintext.= $block ^ $key;
|
823 |
+
}
|
824 |
+
}
|
825 |
+
if ($this->continuousBuffer) {
|
826 |
+
$this->decryptIV = $xor;
|
827 |
+
if ($start = strlen($ciphertext) % $block_size) {
|
828 |
+
$buffer = substr($key, $start) . $buffer;
|
829 |
+
}
|
830 |
+
}
|
831 |
+
break;
|
832 |
+
case CRYPT_RIJNDAEL_MODE_CFB:
|
833 |
+
if (!empty($buffer['ciphertext'])) {
|
834 |
+
$plaintext = $ciphertext ^ substr($this->decryptIV, strlen($buffer['ciphertext']));
|
835 |
+
$buffer['ciphertext'].= substr($ciphertext, 0, strlen($plaintext));
|
836 |
+
if (strlen($buffer['ciphertext']) == $block_size) {
|
837 |
+
$xor = $this->_encryptBlock($buffer['ciphertext']);
|
838 |
+
$buffer['ciphertext'] = '';
|
839 |
+
}
|
840 |
+
$start = strlen($plaintext);
|
841 |
+
$block = $this->decryptIV;
|
842 |
+
} else {
|
843 |
+
$plaintext = '';
|
844 |
+
$xor = $this->_encryptBlock($this->decryptIV);
|
845 |
+
$start = 0;
|
846 |
+
}
|
847 |
+
|
848 |
+
for ($i = $start; $i < strlen($ciphertext); $i+=$block_size) {
|
849 |
+
$block = substr($ciphertext, $i, $block_size);
|
850 |
+
$plaintext.= $block ^ $xor;
|
851 |
+
if ($continuousBuffer && strlen($block) != $block_size) {
|
852 |
+
$buffer['ciphertext'].= $block;
|
853 |
+
$block = $xor;
|
854 |
+
} else if (strlen($block) == $block_size) {
|
855 |
+
$xor = $this->_encryptBlock($block);
|
856 |
+
}
|
857 |
+
}
|
858 |
+
if ($this->continuousBuffer) {
|
859 |
+
$this->decryptIV = $block;
|
860 |
+
}
|
861 |
+
break;
|
862 |
+
case CRYPT_RIJNDAEL_MODE_OFB:
|
863 |
+
$xor = $this->decryptIV;
|
864 |
+
if (strlen($buffer)) {
|
865 |
+
for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
|
866 |
+
$xor = $this->_encryptBlock($xor);
|
867 |
+
$buffer.= $xor;
|
868 |
+
$key = $this->_string_shift($buffer, $block_size);
|
869 |
+
$plaintext.= substr($ciphertext, $i, $block_size) ^ $key;
|
870 |
+
}
|
871 |
+
} else {
|
872 |
+
for ($i = 0; $i < strlen($ciphertext); $i+=$block_size) {
|
873 |
+
$xor = $this->_encryptBlock($xor);
|
874 |
+
$plaintext.= substr($ciphertext, $i, $block_size) ^ $xor;
|
875 |
+
}
|
876 |
+
$key = $xor;
|
877 |
+
}
|
878 |
+
if ($this->continuousBuffer) {
|
879 |
+
$this->decryptIV = $xor;
|
880 |
+
if ($start = strlen($ciphertext) % $block_size) {
|
881 |
+
$buffer = substr($key, $start) . $buffer;
|
882 |
+
}
|
883 |
+
}
|
884 |
+
}
|
885 |
+
|
886 |
+
return $this->paddable ? $this->_unpad($plaintext) : $plaintext;
|
887 |
+
}
|
888 |
+
|
889 |
+
/**
|
890 |
+
* Encrypts a block
|
891 |
+
*
|
892 |
+
* @access private
|
893 |
+
* @param String $in
|
894 |
+
* @return String
|
895 |
+
*/
|
896 |
+
function _encryptBlock($in)
|
897 |
+
{
|
898 |
+
$state = array();
|
899 |
+
$words = unpack('N*word', $in);
|
900 |
+
|
901 |
+
$w = $this->w;
|
902 |
+
$t0 = $this->t0;
|
903 |
+
$t1 = $this->t1;
|
904 |
+
$t2 = $this->t2;
|
905 |
+
$t3 = $this->t3;
|
906 |
+
$Nb = $this->Nb;
|
907 |
+
$Nr = $this->Nr;
|
908 |
+
$c = $this->c;
|
909 |
+
|
910 |
+
// addRoundKey
|
911 |
+
$i = 0;
|
912 |
+
foreach ($words as $word) {
|
913 |
+
$state[] = $word ^ $w[0][$i++];
|
914 |
+
}
|
915 |
+
|
916 |
+
// fips-197.pdf#page=19, "Figure 5. Pseudo Code for the Cipher", states that this loop has four components -
|
917 |
+
// subBytes, shiftRows, mixColumns, and addRoundKey. fips-197.pdf#page=30, "Implementation Suggestions Regarding
|
918 |
+
// Various Platforms" suggests that performs enhanced implementations are described in Rijndael-ammended.pdf.
|
919 |
+
// Rijndael-ammended.pdf#page=20, "Implementation aspects / 32-bit processor", discusses such an optimization.
|
920 |
+
// Unfortunately, the description given there is not quite correct. Per aes.spec.v316.pdf#page=19 [1],
|
921 |
+
// equation (7.4.7) is supposed to use addition instead of subtraction, so we'll do that here, as well.
|
922 |
+
|
923 |
+
// [1] http://fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.v316.pdf
|
924 |
+
$temp = array();
|
925 |
+
for ($round = 1; $round < $Nr; $round++) {
|
926 |
+
$i = 0; // $c[0] == 0
|
927 |
+
$j = $c[1];
|
928 |
+
$k = $c[2];
|
929 |
+
$l = $c[3];
|
930 |
+
|
931 |
+
while ($i < $this->Nb) {
|
932 |
+
$temp[$i] = $t0[$state[$i] & 0xFF000000] ^
|
933 |
+
$t1[$state[$j] & 0x00FF0000] ^
|
934 |
+
$t2[$state[$k] & 0x0000FF00] ^
|
935 |
+
$t3[$state[$l] & 0x000000FF] ^
|
936 |
+
$w[$round][$i];
|
937 |
+
$i++;
|
938 |
+
$j = ($j + 1) % $Nb;
|
939 |
+
$k = ($k + 1) % $Nb;
|
940 |
+
$l = ($l + 1) % $Nb;
|
941 |
+
}
|
942 |
+
|
943 |
+
for ($i = 0; $i < $Nb; $i++) {
|
944 |
+
$state[$i] = $temp[$i];
|
945 |
+
}
|
946 |
+
}
|
947 |
+
|
948 |
+
// subWord
|
949 |
+
for ($i = 0; $i < $Nb; $i++) {
|
950 |
+
$state[$i] = $this->_subWord($state[$i]);
|
951 |
+
}
|
952 |
+
|
953 |
+
// shiftRows + addRoundKey
|
954 |
+
$i = 0; // $c[0] == 0
|
955 |
+
$j = $c[1];
|
956 |
+
$k = $c[2];
|
957 |
+
$l = $c[3];
|
958 |
+
while ($i < $this->Nb) {
|
959 |
+
$temp[$i] = ($state[$i] & 0xFF000000) ^
|
960 |
+
($state[$j] & 0x00FF0000) ^
|
961 |
+
($state[$k] & 0x0000FF00) ^
|
962 |
+
($state[$l] & 0x000000FF) ^
|
963 |
+
$w[$Nr][$i];
|
964 |
+
$i++;
|
965 |
+
$j = ($j + 1) % $Nb;
|
966 |
+
$k = ($k + 1) % $Nb;
|
967 |
+
$l = ($l + 1) % $Nb;
|
968 |
+
}
|
969 |
+
$state = $temp;
|
970 |
+
|
971 |
+
array_unshift($state, 'N*');
|
972 |
+
|
973 |
+
return call_user_func_array('pack', $state);
|
974 |
+
}
|
975 |
+
|
976 |
+
/**
|
977 |
+
* Decrypts a block
|
978 |
+
*
|
979 |
+
* @access private
|
980 |
+
* @param String $in
|
981 |
+
* @return String
|
982 |
+
*/
|
983 |
+
function _decryptBlock($in)
|
984 |
+
{
|
985 |
+
$state = array();
|
986 |
+
$words = unpack('N*word', $in);
|
987 |
+
|
988 |
+
$num_states = count($state);
|
989 |
+
$dw = $this->dw;
|
990 |
+
$dt0 = $this->dt0;
|
991 |
+
$dt1 = $this->dt1;
|
992 |
+
$dt2 = $this->dt2;
|
993 |
+
$dt3 = $this->dt3;
|
994 |
+
$Nb = $this->Nb;
|
995 |
+
$Nr = $this->Nr;
|
996 |
+
$c = $this->c;
|
997 |
+
|
998 |
+
// addRoundKey
|
999 |
+
$i = 0;
|
1000 |
+
foreach ($words as $word) {
|
1001 |
+
$state[] = $word ^ $dw[$Nr][$i++];
|
1002 |
+
}
|
1003 |
+
|
1004 |
+
$temp = array();
|
1005 |
+
for ($round = $Nr - 1; $round > 0; $round--) {
|
1006 |
+
$i = 0; // $c[0] == 0
|
1007 |
+
$j = $Nb - $c[1];
|
1008 |
+
$k = $Nb - $c[2];
|
1009 |
+
$l = $Nb - $c[3];
|
1010 |
+
|
1011 |
+
while ($i < $Nb) {
|
1012 |
+
$temp[$i] = $dt0[$state[$i] & 0xFF000000] ^
|
1013 |
+
$dt1[$state[$j] & 0x00FF0000] ^
|
1014 |
+
$dt2[$state[$k] & 0x0000FF00] ^
|
1015 |
+
$dt3[$state[$l] & 0x000000FF] ^
|
1016 |
+
$dw[$round][$i];
|
1017 |
+
$i++;
|
1018 |
+
$j = ($j + 1) % $Nb;
|
1019 |
+
$k = ($k + 1) % $Nb;
|
1020 |
+
$l = ($l + 1) % $Nb;
|
1021 |
+
}
|
1022 |
+
|
1023 |
+
for ($i = 0; $i < $Nb; $i++) {
|
1024 |
+
$state[$i] = $temp[$i];
|
1025 |
+
}
|
1026 |
+
}
|
1027 |
+
|
1028 |
+
// invShiftRows + invSubWord + addRoundKey
|
1029 |
+
$i = 0; // $c[0] == 0
|
1030 |
+
$j = $Nb - $c[1];
|
1031 |
+
$k = $Nb - $c[2];
|
1032 |
+
$l = $Nb - $c[3];
|
1033 |
+
|
1034 |
+
while ($i < $Nb) {
|
1035 |
+
$temp[$i] = $dw[0][$i] ^
|
1036 |
+
$this->_invSubWord(($state[$i] & 0xFF000000) |
|
1037 |
+
($state[$j] & 0x00FF0000) |
|
1038 |
+
($state[$k] & 0x0000FF00) |
|
1039 |
+
($state[$l] & 0x000000FF));
|
1040 |
+
$i++;
|
1041 |
+
$j = ($j + 1) % $Nb;
|
1042 |
+
$k = ($k + 1) % $Nb;
|
1043 |
+
$l = ($l + 1) % $Nb;
|
1044 |
+
}
|
1045 |
+
|
1046 |
+
$state = $temp;
|
1047 |
+
|
1048 |
+
array_unshift($state, 'N*');
|
1049 |
+
|
1050 |
+
return call_user_func_array('pack', $state);
|
1051 |
+
}
|
1052 |
+
|
1053 |
+
/**
|
1054 |
+
* Setup Rijndael
|
1055 |
+
*
|
1056 |
+
* Validates all the variables and calculates $Nr - the number of rounds that need to be performed - and $w - the key
|
1057 |
+
* key schedule.
|
1058 |
+
*
|
1059 |
+
* @access private
|
1060 |
+
*/
|
1061 |
+
function _setup()
|
1062 |
+
{
|
1063 |
+
// Each number in $rcon is equal to the previous number multiplied by two in Rijndael's finite field.
|
1064 |
+
// See http://en.wikipedia.org/wiki/Finite_field_arithmetic#Multiplicative_inverse
|
1065 |
+
static $rcon = array(0,
|
1066 |
+
0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,
|
1067 |
+
0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000,
|
1068 |
+
0x6C000000, 0xD8000000, 0xAB000000, 0x4D000000, 0x9A000000,
|
1069 |
+
0x2F000000, 0x5E000000, 0xBC000000, 0x63000000, 0xC6000000,
|
1070 |
+
0x97000000, 0x35000000, 0x6A000000, 0xD4000000, 0xB3000000,
|
1071 |
+
0x7D000000, 0xFA000000, 0xEF000000, 0xC5000000, 0x91000000
|
1072 |
+
);
|
1073 |
+
|
1074 |
+
if (!$this->changed) {
|
1075 |
+
return;
|
1076 |
+
}
|
1077 |
+
|
1078 |
+
if (!$this->explicit_key_length) {
|
1079 |
+
// we do >> 2, here, and not >> 5, as we do above, since strlen($this->key) tells us the number of bytes - not bits
|
1080 |
+
$length = strlen($this->key) >> 2;
|
1081 |
+
if ($length > 8) {
|
1082 |
+
$length = 8;
|
1083 |
+
} else if ($length < 4) {
|
1084 |
+
$length = 4;
|
1085 |
+
}
|
1086 |
+
$this->Nk = $length;
|
1087 |
+
$this->key_size = $length << 2;
|
1088 |
+
}
|
1089 |
+
|
1090 |
+
$this->key = str_pad(substr($this->key, 0, $this->key_size), $this->key_size, chr(0));
|
1091 |
+
$this->encryptIV = $this->decryptIV = $this->iv = str_pad(substr($this->iv, 0, $this->block_size), $this->block_size, chr(0));
|
1092 |
+
|
1093 |
+
// see Rijndael-ammended.pdf#page=44
|
1094 |
+
$this->Nr = max($this->Nk, $this->Nb) + 6;
|
1095 |
+
|
1096 |
+
// shift offsets for Nb = 5, 7 are defined in Rijndael-ammended.pdf#page=44,
|
1097 |
+
// "Table 8: Shift offsets in Shiftrow for the alternative block lengths"
|
1098 |
+
// shift offsets for Nb = 4, 6, 8 are defined in Rijndael-ammended.pdf#page=14,
|
1099 |
+
// "Table 2: Shift offsets for different block lengths"
|
1100 |
+
switch ($this->Nb) {
|
1101 |
+
case 4:
|
1102 |
+
case 5:
|
1103 |
+
case 6:
|
1104 |
+
$this->c = array(0, 1, 2, 3);
|
1105 |
+
break;
|
1106 |
+
case 7:
|
1107 |
+
$this->c = array(0, 1, 2, 4);
|
1108 |
+
break;
|
1109 |
+
case 8:
|
1110 |
+
$this->c = array(0, 1, 3, 4);
|
1111 |
+
}
|
1112 |
+
|
1113 |
+
$key = $this->key;
|
1114 |
+
|
1115 |
+
$w = array_values(unpack('N*words', $key));
|
1116 |
+
|
1117 |
+
$length = $this->Nb * ($this->Nr + 1);
|
1118 |
+
for ($i = $this->Nk; $i < $length; $i++) {
|
1119 |
+
$temp = $w[$i - 1];
|
1120 |
+
if ($i % $this->Nk == 0) {
|
1121 |
+
// according to <http://php.net/language.types.integer>, "the size of an integer is platform-dependent".
|
1122 |
+
// on a 32-bit machine, it's 32-bits, and on a 64-bit machine, it's 64-bits. on a 32-bit machine,
|
1123 |
+
// 0xFFFFFFFF << 8 == 0xFFFFFF00, but on a 64-bit machine, it equals 0xFFFFFFFF00. as such, doing 'and'
|
1124 |
+
// with 0xFFFFFFFF (or 0xFFFFFF00) on a 32-bit machine is unnecessary, but on a 64-bit machine, it is.
|
1125 |
+
$temp = (($temp << 8) & 0xFFFFFF00) | (($temp >> 24) & 0x000000FF); // rotWord
|
1126 |
+
$temp = $this->_subWord($temp) ^ $rcon[$i / $this->Nk];
|
1127 |
+
} else if ($this->Nk > 6 && $i % $this->Nk == 4) {
|
1128 |
+
$temp = $this->_subWord($temp);
|
1129 |
+
}
|
1130 |
+
$w[$i] = $w[$i - $this->Nk] ^ $temp;
|
1131 |
+
}
|
1132 |
+
|
1133 |
+
// convert the key schedule from a vector of $Nb * ($Nr + 1) length to a matrix with $Nr + 1 rows and $Nb columns
|
1134 |
+
// and generate the inverse key schedule. more specifically,
|
1135 |
+
// according to <http://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf#page=23> (section 5.3.3),
|
1136 |
+
// "The key expansion for the Inverse Cipher is defined as follows:
|
1137 |
+
// 1. Apply the Key Expansion.
|
1138 |
+
// 2. Apply InvMixColumn to all Round Keys except the first and the last one."
|
1139 |
+
// also, see fips-197.pdf#page=27, "5.3.5 Equivalent Inverse Cipher"
|
1140 |
+
$temp = array();
|
1141 |
+
for ($i = $row = $col = 0; $i < $length; $i++, $col++) {
|
1142 |
+
if ($col == $this->Nb) {
|
1143 |
+
if ($row == 0) {
|
1144 |
+
$this->dw[0] = $this->w[0];
|
1145 |
+
} else {
|
1146 |
+
// subWord + invMixColumn + invSubWord = invMixColumn
|
1147 |
+
$j = 0;
|
1148 |
+
while ($j < $this->Nb) {
|
1149 |
+
$dw = $this->_subWord($this->w[$row][$j]);
|
1150 |
+
$temp[$j] = $this->dt0[$dw & 0xFF000000] ^
|
1151 |
+
$this->dt1[$dw & 0x00FF0000] ^
|
1152 |
+
$this->dt2[$dw & 0x0000FF00] ^
|
1153 |
+
$this->dt3[$dw & 0x000000FF];
|
1154 |
+
$j++;
|
1155 |
+
}
|
1156 |
+
$this->dw[$row] = $temp;
|
1157 |
+
}
|
1158 |
+
|
1159 |
+
$col = 0;
|
1160 |
+
$row++;
|
1161 |
+
}
|
1162 |
+
$this->w[$row][$col] = $w[$i];
|
1163 |
+
}
|
1164 |
+
|
1165 |
+
$this->dw[$row] = $this->w[$row];
|
1166 |
+
|
1167 |
+
$this->changed = false;
|
1168 |
+
}
|
1169 |
|