<?php
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namespace PhpOffice\PhpSpreadsheet\Shared;
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class PasswordHasher
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{
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/**
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* Create a password hash from a given string.
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*
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* This method is based on the algorithm provided by
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* Daniel Rentz of OpenOffice and the PEAR package
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* Spreadsheet_Excel_Writer by Xavier Noguer <xnoguer@rezebra.com>.
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*
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* @param string $pPassword Password to hash
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*
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* @return string Hashed password
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*/
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public static function hashPassword($pPassword)
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{
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$password = 0x0000;
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$charPos = 1; // char position
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// split the plain text password in its component characters
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$chars = preg_split('//', $pPassword, -1, PREG_SPLIT_NO_EMPTY);
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foreach ($chars as $char) {
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$value = ord($char) << $charPos++; // shifted ASCII value
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$rotated_bits = $value >> 15; // rotated bits beyond bit 15
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$value &= 0x7fff; // first 15 bits
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$password ^= ($value | $rotated_bits);
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}
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$password ^= strlen($pPassword);
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$password ^= 0xCE4B;
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return strtoupper(dechex($password));
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}
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}
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