MD5.php in Loft Data Grids 7.2

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

<?php

/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2014 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 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt        LGPL
 * @version    ##VERSION##, ##DATE##
 */

/**
 * PHPExcel_Reader_Excel5_MD5
 *
 * @category        PHPExcel
 * @package                PHPExcel_Reader_Excel5
 * @copyright        Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
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, $words[10], 9, 0x2441453);
    self::step($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, $words[6], 23, 0x4881d05);
    self::step($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));
  }

}

Classes

Name	Description
PHPExcel_Reader_Excel5_MD5	PHPExcel_Reader_Excel5_MD5