visualizer / vendor / phpoffice / phpexcel / Classes / PHPExcel / Reader / Excel5 / MD5.php

MD5.php in Visualizer – Tables & Charts Manager with Built-in AI Generator 3.0.10, at vendor/phpoffice/phpexcel/Classes/PHPExcel/Reader/Excel5/MD5.php

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1	<?php
2	/**
3	* PHPExcel
4	*
5	* Copyright (c) 2006 - 2014 PHPExcel
6	*
7	* This library is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU Lesser General Public
9	* License as published by the Free Software Foundation; either
10	* version 2.1 of the License, or (at your option) any later version.
11	*
12	* This library is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* Lesser General Public License for more details.
16	*
17	* You should have received a copy of the GNU Lesser General Public
18	* License along with this library; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20	*
21	* @category PHPExcel
22	* @package PHPExcel_Reader_Excel5
23	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
24	* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
25	* @version ##VERSION##, ##DATE##
26	*/
27
28
29	/**
30	* PHPExcel_Reader_Excel5_MD5
31	*
32	* @category PHPExcel
33	* @package PHPExcel_Reader_Excel5
34	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
35	*/
36	class PHPExcel_Reader_Excel5_MD5
37	{
38	// Context
39	private $a;
40	private $b;
41	private $c;
42	private $d;
43
44
45	/**
46	* MD5 stream constructor
47	*/
48	public function __construct()
49	{
50	$this->reset();
51	}
52
53
54	/**
55	* Reset the MD5 stream context
56	*/
57	public function reset()
58	{
59	$this->a = 0x67452301;
60	$this->b = 0xEFCDAB89;
61	$this->c = 0x98BADCFE;
62	$this->d = 0x10325476;
63	}
64
65
66	/**
67	* Get MD5 stream context
68	*
69	* @return string
70	*/
71	public function getContext()
72	{
73	$s = '';
74	foreach (array('a', 'b', 'c', 'd') as $i) {
75	$v = $this->{$i};
76	$s .= chr($v & 0xff);
77	$s .= chr(($v >> 8) & 0xff);
78	$s .= chr(($v >> 16) & 0xff);
79	$s .= chr(($v >> 24) & 0xff);
80	}
81
82	return $s;
83	}
84
85
86	/**
87	* Add data to context
88	*
89	* @param string $data Data to add
90	*/
91	public function add($data)
92	{
93	$words = array_values(unpack('V16', $data));
94
95	$A = $this->a;
96	$B = $this->b;
97	$C = $this->c;
98	$D = $this->d;
99
100	$F = array('PHPExcel_Reader_Excel5_MD5','F');
101	$G = array('PHPExcel_Reader_Excel5_MD5','G');
102	$H = array('PHPExcel_Reader_Excel5_MD5','H');
103	$I = array('PHPExcel_Reader_Excel5_MD5','I');
104
105	/* ROUND 1 */
106	self::step($F, $A, $B, $C, $D, $words[0], 7, 0xd76aa478);
107	self::step($F, $D, $A, $B, $C, $words[1], 12, 0xe8c7b756);
108	self::step($F, $C, $D, $A, $B, $words[2], 17, 0x242070db);
109	self::step($F, $B, $C, $D, $A, $words[3], 22, 0xc1bdceee);
110	self::step($F, $A, $B, $C, $D, $words[4], 7, 0xf57c0faf);
111	self::step($F, $D, $A, $B, $C, $words[5], 12, 0x4787c62a);
112	self::step($F, $C, $D, $A, $B, $words[6], 17, 0xa8304613);
113	self::step($F, $B, $C, $D, $A, $words[7], 22, 0xfd469501);
114	self::step($F, $A, $B, $C, $D, $words[8], 7, 0x698098d8);
115	self::step($F, $D, $A, $B, $C, $words[9], 12, 0x8b44f7af);
116	self::step($F, $C, $D, $A, $B, $words[10], 17, 0xffff5bb1);
117	self::step($F, $B, $C, $D, $A, $words[11], 22, 0x895cd7be);
118	self::step($F, $A, $B, $C, $D, $words[12], 7, 0x6b901122);
119	self::step($F, $D, $A, $B, $C, $words[13], 12, 0xfd987193);
120	self::step($F, $C, $D, $A, $B, $words[14], 17, 0xa679438e);
121	self::step($F, $B, $C, $D, $A, $words[15], 22, 0x49b40821);
122
123	/* ROUND 2 */
124	self::step($G, $A, $B, $C, $D, $words[1], 5, 0xf61e2562);
125	self::step($G, $D, $A, $B, $C, $words[6], 9, 0xc040b340);
126	self::step($G, $C, $D, $A, $B, $words[11], 14, 0x265e5a51);
127	self::step($G, $B, $C, $D, $A, $words[0], 20, 0xe9b6c7aa);
128	self::step($G, $A, $B, $C, $D, $words[5], 5, 0xd62f105d);
129	self::step($G, $D, $A, $B, $C, $words[10], 9, 0x02441453);
130	self::step($G, $C, $D, $A, $B, $words[15], 14, 0xd8a1e681);
131	self::step($G, $B, $C, $D, $A, $words[4], 20, 0xe7d3fbc8);
132	self::step($G, $A, $B, $C, $D, $words[9], 5, 0x21e1cde6);
133	self::step($G, $D, $A, $B, $C, $words[14], 9, 0xc33707d6);
134	self::step($G, $C, $D, $A, $B, $words[3], 14, 0xf4d50d87);
135	self::step($G, $B, $C, $D, $A, $words[8], 20, 0x455a14ed);
136	self::step($G, $A, $B, $C, $D, $words[13], 5, 0xa9e3e905);
137	self::step($G, $D, $A, $B, $C, $words[2], 9, 0xfcefa3f8);
138	self::step($G, $C, $D, $A, $B, $words[7], 14, 0x676f02d9);
139	self::step($G, $B, $C, $D, $A, $words[12], 20, 0x8d2a4c8a);
140
141	/* ROUND 3 */
142	self::step($H, $A, $B, $C, $D, $words[5], 4, 0xfffa3942);
143	self::step($H, $D, $A, $B, $C, $words[8], 11, 0x8771f681);
144	self::step($H, $C, $D, $A, $B, $words[11], 16, 0x6d9d6122);
145	self::step($H, $B, $C, $D, $A, $words[14], 23, 0xfde5380c);
146	self::step($H, $A, $B, $C, $D, $words[1], 4, 0xa4beea44);
147	self::step($H, $D, $A, $B, $C, $words[4], 11, 0x4bdecfa9);
148	self::step($H, $C, $D, $A, $B, $words[7], 16, 0xf6bb4b60);
149	self::step($H, $B, $C, $D, $A, $words[10], 23, 0xbebfbc70);
150	self::step($H, $A, $B, $C, $D, $words[13], 4, 0x289b7ec6);
151	self::step($H, $D, $A, $B, $C, $words[0], 11, 0xeaa127fa);
152	self::step($H, $C, $D, $A, $B, $words[3], 16, 0xd4ef3085);
153	self::step($H, $B, $C, $D, $A, $words[6], 23, 0x04881d05);
154	self::step($H, $A, $B, $C, $D, $words[9], 4, 0xd9d4d039);
155	self::step($H, $D, $A, $B, $C, $words[12], 11, 0xe6db99e5);
156	self::step($H, $C, $D, $A, $B, $words[15], 16, 0x1fa27cf8);
157	self::step($H, $B, $C, $D, $A, $words[2], 23, 0xc4ac5665);
158
159	/* ROUND 4 */
160	self::step($I, $A, $B, $C, $D, $words[0], 6, 0xf4292244);
161	self::step($I, $D, $A, $B, $C, $words[7], 10, 0x432aff97);
162	self::step($I, $C, $D, $A, $B, $words[14], 15, 0xab9423a7);
163	self::step($I, $B, $C, $D, $A, $words[5], 21, 0xfc93a039);
164	self::step($I, $A, $B, $C, $D, $words[12], 6, 0x655b59c3);
165	self::step($I, $D, $A, $B, $C, $words[3], 10, 0x8f0ccc92);
166	self::step($I, $C, $D, $A, $B, $words[10], 15, 0xffeff47d);
167	self::step($I, $B, $C, $D, $A, $words[1], 21, 0x85845dd1);
168	self::step($I, $A, $B, $C, $D, $words[8], 6, 0x6fa87e4f);
169	self::step($I, $D, $A, $B, $C, $words[15], 10, 0xfe2ce6e0);
170	self::step($I, $C, $D, $A, $B, $words[6], 15, 0xa3014314);
171	self::step($I, $B, $C, $D, $A, $words[13], 21, 0x4e0811a1);
172	self::step($I, $A, $B, $C, $D, $words[4], 6, 0xf7537e82);
173	self::step($I, $D, $A, $B, $C, $words[11], 10, 0xbd3af235);
174	self::step($I, $C, $D, $A, $B, $words[2], 15, 0x2ad7d2bb);
175	self::step($I, $B, $C, $D, $A, $words[9], 21, 0xeb86d391);
176
177	$this->a = ($this->a + $A) & 0xffffffff;
178	$this->b = ($this->b + $B) & 0xffffffff;
179	$this->c = ($this->c + $C) & 0xffffffff;
180	$this->d = ($this->d + $D) & 0xffffffff;
181	}
182
183
184	private static function F($X, $Y, $Z)
185	{
186	return (($X & $Y) \| ((~ $X) & $Z)); // X AND Y OR NOT X AND Z
187	}
188
189
190	private static function G($X, $Y, $Z)
191	{
192	return (($X & $Z) \| ($Y & (~ $Z))); // X AND Z OR Y AND NOT Z
193	}
194
195
196	private static function H($X, $Y, $Z)
197	{
198	return ($X ^ $Y ^ $Z); // X XOR Y XOR Z
199	}
200
201
202	private static function I($X, $Y, $Z)
203	{
204	return ($Y ^ ($X \| (~ $Z))) ; // Y XOR (X OR NOT Z)
205	}
206
207
208	private static function step($func, &$A, $B, $C, $D, $M, $s, $t)
209	{
210	$A = ($A + call_user_func($func, $B, $C, $D) + $M + $t) & 0xffffffff;
211	$A = self::rotate($A, $s);
212	$A = ($B + $A) & 0xffffffff;
213	}
214
215
216	private static function rotate($decimal, $bits)
217	{
218	$binary = str_pad(decbin($decimal), 32, "0", STR_PAD_LEFT);
219	return bindec(substr($binary, $bits).substr($binary, 0, $bits));
220	}
221	}