1: <?php
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27:
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36: class PHPExcel_Reader_Excel5_MD5
37: {
38:
39: private $a;
40: private $b;
41: private $c;
42: private $d;
43:
44:
45: 46: 47:
48: public function __construct()
49: {
50: $this->reset();
51: }
52:
53:
54: 55: 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: 68: 69: 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 $s;
83: }
84:
85:
86: 87: 88: 89: 90:
91: public function add($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: $I = array('PHPExcel_Reader_Excel5_MD5','I');
104:
105:
106: self::step($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, $words[15], 22, 0x49b40821);
122:
123:
124: self::step($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, $words[12], 20, 0x8d2a4c8a);
140:
141:
142: self::step($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, $words[2], 23, 0xc4ac5665);
158:
159:
160: self::step($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) & $Z));
187: }
188:
189:
190: private static function G($X, $Y, $Z)
191: {
192: return (($X & $Z) | ($Y & (~ $Z)));
193: }
194:
195:
196: private static function H($X, $Y, $Z)
197: {
198: return ($X ^ $Y ^ $Z);
199: }
200:
201:
202: private static function I($X, $Y, $Z)
203: {
204: return ($Y ^ ($X | (~ $Z))) ;
205: }
206:
207:
208: private static function step($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: }