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<?php /** * PHPExcel_Reader_Excel5_MD5 * * Copyright (c) 2006 - 2015 PHPExcel * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * @category PHPExcel * @package PHPExcel_Reader_Excel5 * @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel) * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL * @version ##VERSION##, ##DATE## */ class PHPExcel_Reader_Excel5_MD5 { // Context private $a; private $b; private $c; private $d; /** * MD5 stream constructor */ public function __construct() { $this->reset(); } /** * Reset the MD5 stream context */ public function reset() { $this->a = 0x67452301; $this->b = 0xEFCDAB89; $this->c = 0x98BADCFE; $this->d = 0x10325476; } /** * Get MD5 stream context * * @return string */ public function getContext() { $s = ''; foreach (array('a', 'b', 'c', 'd') as $i) { $v = $this->{$i}; $s .= chr($v & 0xff); $s .= chr(($v >> 8) & 0xff); $s .= chr(($v >> 16) & 0xff); $s .= chr(($v >> 24) & 0xff); } return $s; } /** * Add data to context * * @param string $data Data to add */ public function add($data) { $words = array_values(unpack('V16', $data)); $A = $this->a; $B = $this->b; $C = $this->c; $D = $this->d; $F = array('PHPExcel_Reader_Excel5_MD5','f'); $G = array('PHPExcel_Reader_Excel5_MD5','g'); $H = array('PHPExcel_Reader_Excel5_MD5','h'); $I = array('PHPExcel_Reader_Excel5_MD5','i'); /* ROUND 1 */ self::step($F, $A, $B, $C, $D, $words[0], 7, 0xd76aa478); self::step($F, $D, $A, $B, $C, $words[1], 12, 0xe8c7b756); self::step($F, $C, $D, $A, $B, $words[2], 17, 0x242070db); self::step($F, $B, $C, $D, $A, $words[3], 22, 0xc1bdceee); self::step($F, $A, $B, $C, $D, $words[4], 7, 0xf57c0faf); self::step($F, $D, $A, $B, $C, $words[5], 12, 0x4787c62a); self::step($F, $C, $D, $A, $B, $words[6], 17, 0xa8304613); self::step($F, $B, $C, $D, $A, $words[7], 22, 0xfd469501); self::step($F, $A, $B, $C, $D, $words[8], 7, 0x698098d8); self::step($F, $D, $A, $B, $C, $words[9], 12, 0x8b44f7af); self::step($F, $C, $D, $A, $B, $words[10], 17, 0xffff5bb1); self::step($F, $B, $C, $D, $A, $words[11], 22, 0x895cd7be); self::step($F, $A, $B, $C, $D, $words[12], 7, 0x6b901122); self::step($F, $D, $A, $B, $C, $words[13], 12, 0xfd987193); self::step($F, $C, $D, $A, $B, $words[14], 17, 0xa679438e); self::step($F, $B, $C, $D, $A, $words[15], 22, 0x49b40821); /* ROUND 2 */ self::step($G, $A, $B, $C, $D, $words[1], 5, 0xf61e2562); self::step($G, $D, $A, $B, $C, $words[6], 9, 0xc040b340); self::step($G, $C, $D, $A, $B, $words[11], 14, 0x265e5a51); self::step($G, $B, $C, $D, $A, $words[0], 20, 0xe9b6c7aa); self::step($G, $A, $B, $C, $D, $words[5], 5, 0xd62f105d); self::step($G, $D, $A, $B, $C, $words[10], 9, 0x02441453); self::step($G, $C, $D, $A, $B, $words[15], 14, 0xd8a1e681); self::step($G, $B, $C, $D, $A, $words[4], 20, 0xe7d3fbc8); self::step($G, $A, $B, $C, $D, $words[9], 5, 0x21e1cde6); self::step($G, $D, $A, $B, $C, $words[14], 9, 0xc33707d6); self::step($G, $C, $D, $A, $B, $words[3], 14, 0xf4d50d87); self::step($G, $B, $C, $D, $A, $words[8], 20, 0x455a14ed); self::step($G, $A, $B, $C, $D, $words[13], 5, 0xa9e3e905); self::step($G, $D, $A, $B, $C, $words[2], 9, 0xfcefa3f8); self::step($G, $C, $D, $A, $B, $words[7], 14, 0x676f02d9); self::step($G, $B, $C, $D, $A, $words[12], 20, 0x8d2a4c8a); /* ROUND 3 */ self::step($H, $A, $B, $C, $D, $words[5], 4, 0xfffa3942); self::step($H, $D, $A, $B, $C, $words[8], 11, 0x8771f681); self::step($H, $C, $D, $A, $B, $words[11], 16, 0x6d9d6122); self::step($H, $B, $C, $D, $A, $words[14], 23, 0xfde5380c); self::step($H, $A, $B, $C, $D, $words[1], 4, 0xa4beea44); self::step($H, $D, $A, $B, $C, $words[4], 11, 0x4bdecfa9); self::step($H, $C, $D, $A, $B, $words[7], 16, 0xf6bb4b60); self::step($H, $B, $C, $D, $A, $words[10], 23, 0xbebfbc70); self::step($H, $A, $B, $C, $D, $words[13], 4, 0x289b7ec6); self::step($H, $D, $A, $B, $C, $words[0], 11, 0xeaa127fa); self::step($H, $C, $D, $A, $B, $words[3], 16, 0xd4ef3085); self::step($H, $B, $C, $D, $A, $words[6], 23, 0x04881d05); self::step($H, $A, $B, $C, $D, $words[9], 4, 0xd9d4d039); self::step($H, $D, $A, $B, $C, $words[12], 11, 0xe6db99e5); self::step($H, $C, $D, $A, $B, $words[15], 16, 0x1fa27cf8); self::step($H, $B, $C, $D, $A, $words[2], 23, 0xc4ac5665); /* ROUND 4 */ self::step($I, $A, $B, $C, $D, $words[0], 6, 0xf4292244); self::step($I, $D, $A, $B, $C, $words[7], 10, 0x432aff97); self::step($I, $C, $D, $A, $B, $words[14], 15, 0xab9423a7); self::step($I, $B, $C, $D, $A, $words[5], 21, 0xfc93a039); self::step($I, $A, $B, $C, $D, $words[12], 6, 0x655b59c3); self::step($I, $D, $A, $B, $C, $words[3], 10, 0x8f0ccc92); self::step($I, $C, $D, $A, $B, $words[10], 15, 0xffeff47d); self::step($I, $B, $C, $D, $A, $words[1], 21, 0x85845dd1); self::step($I, $A, $B, $C, $D, $words[8], 6, 0x6fa87e4f); self::step($I, $D, $A, $B, $C, $words[15], 10, 0xfe2ce6e0); self::step($I, $C, $D, $A, $B, $words[6], 15, 0xa3014314); self::step($I, $B, $C, $D, $A, $words[13], 21, 0x4e0811a1); self::step($I, $A, $B, $C, $D, $words[4], 6, 0xf7537e82); self::step($I, $D, $A, $B, $C, $words[11], 10, 0xbd3af235); self::step($I, $C, $D, $A, $B, $words[2], 15, 0x2ad7d2bb); self::step($I, $B, $C, $D, $A, $words[9], 21, 0xeb86d391); $this->a = ($this->a + $A) & 0xffffffff; $this->b = ($this->b + $B) & 0xffffffff; $this->c = ($this->c + $C) & 0xffffffff; $this->d = ($this->d + $D) & 0xffffffff; } private static function f($X, $Y, $Z) { return (($X & $Y) | ((~ $X) & $Z)); // X AND Y OR NOT X AND Z } private static function g($X, $Y, $Z) { return (($X & $Z) | ($Y & (~ $Z))); // X AND Z OR Y AND NOT Z } private static function h($X, $Y, $Z) { return ($X ^ $Y ^ $Z); // X XOR Y XOR Z } private static function i($X, $Y, $Z) { return ($Y ^ ($X | (~ $Z))) ; // Y XOR (X OR NOT Z) } private static function step($func, &$A, $B, $C, $D, $M, $s, $t) { $A = ($A + call_user_func($func, $B, $C, $D) + $M + $t) & 0xffffffff; $A = self::rotate($A, $s); $A = ($B + $A) & 0xffffffff; } private static function rotate($decimal, $bits) { $binary = str_pad(decbin($decimal), 32, "0", STR_PAD_LEFT); return bindec(substr($binary, $bits).substr($binary, 0, $bits)); } }
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