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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
|
<html>
<head>
<title>Docs For Class Crypt_DES</title>
<link rel="stylesheet" type="text/css" href="../media/style.css">
</head>
<body>
<table border="0" cellspacing="0" cellpadding="0" height="48" width="100%">
<tr>
<td class="header_top">Crypt_DES</td>
</tr>
<tr><td class="header_line"><img src="../media/empty.png" width="1" height="1" border="0" alt="" /></td></tr>
<tr>
<td class="header_menu">
[ <a href="../classtrees_Crypt_DES.html" class="menu">class tree: Crypt_DES</a> ]
[ <a href="../elementindex_Crypt_DES.html" class="menu">index: Crypt_DES</a> ]
[ <a href="../elementindex.html" class="menu">all elements</a> ]
</td>
</tr>
<tr><td class="header_line"><img src="../media/empty.png" width="1" height="1" border="0" alt="" /></td></tr>
</table>
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<tr valign="top">
<td width="200" class="menu">
<div id="ric">
<p><a href="../ric_README.html">README</a></p>
</div>
<div id="todolist">
<p><a href="../todolist.html">Todo List</a></p>
</div>
<b>Packages:</b><br />
<a href="../li_main.html">main</a><br />
<a href="../li_configuration.html">configuration</a><br />
<a href="../li_Crypt_AES.html">Crypt_AES</a><br />
<a href="../li_Crypt_DES.html">Crypt_DES</a><br />
<a href="../li_Crypt_Hash.html">Crypt_Hash</a><br />
<a href="../li_Crypt_Random.html">Crypt_Random</a><br />
<a href="../li_Crypt_RC4.html">Crypt_RC4</a><br />
<a href="../li_Crypt_Rijndael.html">Crypt_Rijndael</a><br />
<a href="../li_Crypt_RSA.html">Crypt_RSA</a><br />
<a href="../li_Crypt_TerraDES.html">Crypt_TerraDES</a><br />
<a href="../li_Crypt_TripleDES.html">Crypt_TripleDES</a><br />
<a href="../li_default.html">default</a><br />
<a href="../li_Help.html">Help</a><br />
<a href="../li_horde-cipher.html">horde-cipher</a><br />
<a href="../li_lam.html">lam</a><br />
<a href="../li_LDAP.html">LDAP</a><br />
<a href="../li_lib.html">lib</a><br />
<a href="../li_lists.html">lists</a><br />
<a href="../li_Math_BigInteger.html">Math_BigInteger</a><br />
<a href="../li_metaHTML.html">metaHTML</a><br />
<a href="../li_modules.html">modules</a><br />
<a href="../li_Net_SFTP.html">Net_SFTP</a><br />
<a href="../li_Net_SSH1.html">Net_SSH1</a><br />
<a href="../li_Net_SSH2.html">Net_SSH2</a><br />
<a href="../li_PDF.html">PDF</a><br />
<a href="../li_phpLDAPadmin.html">phpLDAPadmin</a><br />
<a href="../li_PHP_Compat.html">PHP_Compat</a><br />
<a href="../li_profiles.html">profiles</a><br />
<a href="../li_selfService.html">selfService</a><br />
<a href="../li_tools.html">tools</a><br />
<a href="../li_types.html">types</a><br />
<br /><br />
<b>Files:</b><br />
<div class="package">
<a href="../Crypt_DES/_lib---3rdParty---phpseclib---Crypt---DES.php.html"> DES.php
</a><br>
</div><br />
<b>Classes:</b><br />
<div class="package">
<a href="../Crypt_DES/Crypt_DES.html">Crypt_DES</a><br />
</div>
</td>
<td>
<table cellpadding="10" cellspacing="0" width="100%" border="0"><tr><td valign="top">
<h1>Class: Crypt_DES</h1>
Source Location: /lib/3rdParty/phpseclib/Crypt/DES.php<br /><br />
<table width="100%" border="0">
<tr><td valign="top">
<h3><a href="#class_details">Class Overview</a></h3>
<pre></pre><br />
<div class="description">Pure-PHP implementation of DES.</div><br /><br />
<h4>Author(s):</h4>
<ul>
<li>Jim Wigginton <<a href="mailto:terrafrost@php.net">terrafrost@php.net</a>></li>
</ul>
<h4>Version:</h4>
<ul>
<li>0.1.0</li>
</ul>
</td>
<td valign="top">
<h3><a href="#class_methods">Methods</a></h3>
<ul>
<li><a href="../Crypt_DES/Crypt_DES.html#methodCrypt_DES">Crypt_DES</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#methoddecrypt">decrypt</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#methoddisableContinuousBuffer">disableContinuousBuffer</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#methoddisablePadding">disablePadding</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#methodenableContinuousBuffer">enableContinuousBuffer</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#methodenablePadding">enablePadding</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">encrypt</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#methodsetIV">setIV</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#methodsetKey">setKey</a></li>
<li><a href="../Crypt_DES/Crypt_DES.html#method_generate_xor">_generate_xor</a></li>
</ul>
</td>
</tr></table>
<hr />
<table width="100%" border="0"><tr>
</tr></table>
<hr />
<a name="class_details"></a>
<h3>Class Details</h3>
<div class="tags">
[line 139]<br />
Pure-PHP implementation of DES.<br /><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>author:</b> </td><td>Jim Wigginton <<a href="mailto:terrafrost@php.net">terrafrost@php.net</a>></td>
</tr>
<tr>
<td><b>version:</b> </td><td>0.1.0</td>
</tr>
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
</div><br /><br />
<div class="top">[ <a href="#top">Top</a> ]</div><br />
<hr />
<a name="class_methods"></a>
<h3>Class Methods</h3>
<div class="tags">
<hr />
<a name="methodCrypt_DES"></a>
<h3>constructor Crypt_DES <span class="smalllinenumber">[line 294]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code><a href="../Crypt_DES/Crypt_DES.html">Crypt_DES</a> Crypt_DES(
[optional
$mode = CRYPT_MODE_DES_CBC])</code>
</td></tr></table>
</td></tr></table><br />
Default Constructor.<br /><br /><p>Determines whether or not the mcrypt extension should be used. $mode should only, at present, be CRYPT_DES_MODE_ECB or CRYPT_DES_MODE_CBC. If not explictly set, CRYPT_DES_MODE_CBC will be used.</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<h4>Parameters:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td class="type">optional </td>
<td><b>$mode</b> </td>
<td>Integer $mode</td>
</tr>
</table>
</div><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="methoddecrypt"></a>
<h3>method decrypt <span class="smalllinenumber">[line 615]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void decrypt(
String
$ciphertext)</code>
</td></tr></table>
</td></tr></table><br />
Decrypts a message.<br /><br /><p>If strlen($ciphertext) is not a multiple of 8, null bytes will be added to the end of the string until it is.</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>see:</b> </td><td><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">Crypt_DES::encrypt()</a></td>
</tr>
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<h4>Parameters:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td class="type">String </td>
<td><b>$ciphertext</b> </td>
<td></td>
</tr>
</table>
</div><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="methoddisableContinuousBuffer"></a>
<h3>method disableContinuousBuffer <span class="smalllinenumber">[line 833]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void disableContinuousBuffer(
)</code>
</td></tr></table>
</td></tr></table><br />
Treat consecutive packets as if they are a discontinuous buffer.<br /><br /><p>The default behavior.</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>see:</b> </td><td><a href="../Crypt_DES/Crypt_DES.html#methodenableContinuousBuffer">Crypt_DES::enableContinuousBuffer()</a></td>
</tr>
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="methoddisablePadding"></a>
<h3>method disablePadding <span class="smalllinenumber">[line 865]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void disablePadding(
)</code>
</td></tr></table>
</td></tr></table><br />
Do not pad packets.<br /><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>see:</b> </td><td><a href="../Crypt_DES/Crypt_DES.html#methodenablePadding">Crypt_DES::enablePadding()</a></td>
</tr>
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="methodenableContinuousBuffer"></a>
<h3>method enableContinuousBuffer <span class="smalllinenumber">[line 820]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void enableContinuousBuffer(
)</code>
</td></tr></table>
</td></tr></table><br />
Treat consecutive "packets" as if they are a continuous buffer.<br /><br /><p>Say you have a 16-byte plaintext $plaintext. Using the default behavior, the two following code snippets will yield different outputs:</p><p><ol><li><div class="src-line"> echo <span class="src-var">$des</span><span class="src-sym">-></span><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">encrypt</a><span class="src-sym">(</span><a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$plaintext</span><span class="src-sym">, </span><span class="src-num">0</span><span class="src-sym">, </span><span class="src-num">8</span><span class="src-sym">))</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"> echo <span class="src-var">$des</span><span class="src-sym">-></span><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">encrypt</a><span class="src-sym">(</span><a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$plaintext</span><span class="src-sym">, </span><span class="src-num">8</span><span class="src-sym">, </span><span class="src-num">8</span><span class="src-sym">))</span><span class="src-sym">;</span></div></li>
</ol> <ol><li><div class="src-line"> echo <span class="src-var">$des</span><span class="src-sym">-></span><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">encrypt</a><span class="src-sym">(</span><span class="src-var">$plaintext</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
</ol></p><p>The solution is to enable the continuous buffer. Although this will resolve the above discrepancy, it creates another, as demonstrated with the following:</p><p><ol><li><div class="src-line"> <span class="src-var">$des</span><span class="src-sym">-></span><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">encrypt</a><span class="src-sym">(</span><a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$plaintext</span><span class="src-sym">, </span><span class="src-num">0</span><span class="src-sym">, </span><span class="src-num">8</span><span class="src-sym">))</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"> echo <span class="src-var">$des</span><span class="src-sym">-></span><a href="../Crypt_DES/Crypt_DES.html#methoddecrypt">decrypt</a><span class="src-sym">(</span><span class="src-var">$des</span><span class="src-sym">-></span><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">encrypt</a><span class="src-sym">(</span><a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$plaintext</span><span class="src-sym">, </span><span class="src-num">8</span><span class="src-sym">, </span><span class="src-num">8</span><span class="src-sym">)))</span><span class="src-sym">;</span></div></li>
</ol> <ol><li><div class="src-line"> echo <span class="src-var">$des</span><span class="src-sym">-></span><a href="../Crypt_DES/Crypt_DES.html#methoddecrypt">decrypt</a><span class="src-sym">(</span><span class="src-var">$des</span><span class="src-sym">-></span><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">encrypt</a><span class="src-sym">(</span><a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$plaintext</span><span class="src-sym">, </span><span class="src-num">8</span><span class="src-sym">, </span><span class="src-num">8</span><span class="src-sym">)))</span><span class="src-sym">;</span></div></li>
</ol></p><p>With the continuous buffer disabled, these would yield the same output. With it enabled, they yield different outputs. The reason is due to the fact that the initialization vector's change after every encryption / decryption round when the continuous buffer is enabled. When it's disabled, they remain constant.</p><p>Put another way, when the continuous buffer is enabled, the state of the Crypt_DES() object changes after each encryption / decryption round, whereas otherwise, it'd remain constant. For this reason, it's recommended that continuous buffers not be used. They do offer better security and are, in fact, sometimes required (SSH uses them), however, they are also less intuitive and more likely to cause you problems.</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>see:</b> </td><td><a href="../Crypt_DES/Crypt_DES.html#methoddisableContinuousBuffer">Crypt_DES::disableContinuousBuffer()</a></td>
</tr>
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="methodenablePadding"></a>
<h3>method enablePadding <span class="smalllinenumber">[line 854]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void enablePadding(
)</code>
</td></tr></table>
</td></tr></table><br />
Pad "packets".<br /><br /><p>DES works by encrypting eight bytes at a time. If you ever need to encrypt or decrypt something that's not a multiple of eight, it becomes necessary to pad the input so that it's length is a multiple of eight.</p><p>Padding is enabled by default. Sometimes, however, it is undesirable to pad strings. Such is the case in SSH1, where "packets" are padded with random bytes before being encrypted. Unpad these packets and you risk stripping away characters that shouldn't be stripped away. (SSH knows how many bytes are added because the length is transmitted separately)</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>see:</b> </td><td><a href="../Crypt_DES/Crypt_DES.html#methoddisablePadding">Crypt_DES::disablePadding()</a></td>
</tr>
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="methodencrypt"></a>
<h3>method encrypt <span class="smalllinenumber">[line 442]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void encrypt(
String
$plaintext)</code>
</td></tr></table>
</td></tr></table><br />
Encrypts a message.<br /><br /><p>$plaintext will be padded with up to 8 additional bytes. Other DES implementations may or may not pad in the same manner. Other common approaches to padding and the reasons why it's necessary are discussed in the following URL:</p><p><a href="http://www.di-mgt.com.au/cryptopad.html">http://www.di-mgt.com.au/cryptopad.html</a></p><p>An alternative to padding is to, separately, send the length of the file. This is what SSH, in fact, does. strlen($plaintext) will still need to be a multiple of 8, however, arbitrary values can be added to make it that length.</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>see:</b> </td><td><a href="../Crypt_DES/Crypt_DES.html#methoddecrypt">Crypt_DES::decrypt()</a></td>
</tr>
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<h4>Parameters:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td class="type">String </td>
<td><b>$plaintext</b> </td>
<td></td>
</tr>
</table>
</div><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="methodsetIV"></a>
<h3>method setIV <span class="smalllinenumber">[line 381]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void setIV(
String
$iv)</code>
</td></tr></table>
</td></tr></table><br />
Sets the initialization vector. (optional)<br /><br /><p>SetIV is not required when CRYPT_DES_MODE_ECB is being used. If not explictly set, it'll be assumed to be all zero's.</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<h4>Parameters:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td class="type">String </td>
<td><b>$iv</b> </td>
<td></td>
</tr>
</table>
</div><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="methodsetKey"></a>
<h3>method setKey <span class="smalllinenumber">[line 366]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void setKey(
String
$key)</code>
</td></tr></table>
</td></tr></table><br />
Sets the key.<br /><br /><p>Keys can be of any length. DES, itself, uses 64-bit keys (eg. strlen($key) == 8), however, we only use the first eight, if $key has more then eight characters in it, and pad $key with the null byte if it is less then eight characters long.</p><p>DES also requires that every eighth bit be a parity bit, however, we'll ignore that.</p><p>If the key is not explicitly set, it'll be assumed to be all zero's.</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<h4>Parameters:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td class="type">String </td>
<td><b>$key</b> </td>
<td></td>
</tr>
</table>
</div><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
<hr />
<a name="method_generate_xor"></a>
<h3>method _generate_xor <span class="smalllinenumber">[line 399]</span></h3>
<div class="function">
<table width="90%" border="0" cellspacing="0" cellpadding="1"><tr><td class="code_border">
<table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="code">
<code>void _generate_xor(
Integer
$length,
&$iv, String
$iv)</code>
</td></tr></table>
</td></tr></table><br />
Generate CTR XOR encryption key<br /><br /><p>Encrypt the output of this and XOR it against the ciphertext / plaintext to get the plaintext / ciphertext in CTR mode.</p><br /><br /><br />
<h4>Tags:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td><b>see:</b> </td><td><a href="../Crypt_DES/Crypt_DES.html#methoddecrypt">Crypt_DES::decrypt()</a></td>
</tr>
<tr>
<td><b>see:</b> </td><td><a href="../Crypt_DES/Crypt_DES.html#methodencrypt">Crypt_DES::encrypt()</a></td>
</tr>
<tr>
<td><b>access:</b> </td><td>public</td>
</tr>
</table>
</div>
<br /><br />
<h4>Parameters:</h4>
<div class="tags">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td class="type">Integer </td>
<td><b>$length</b> </td>
<td></td>
</tr>
<tr>
<td class="type">String </td>
<td><b>$iv</b> </td>
<td></td>
</tr>
<tr>
<td class="type"> </td>
<td><b>&$iv</b> </td>
<td></td>
</tr>
</table>
</div><br />
<div class="top">[ <a href="#top">Top</a> ]</div>
</div>
</div><br />
<div class="credit">
<hr />
Documentation generated on Sun, 25 Mar 2012 19:35:29 +0200 by <a href="http://www.phpdoc.org">phpDocumentor 1.4.1</a>
</div>
</td></tr></table>
</td>
</tr>
</table>
</body>
</html>
|
