112 lines
2.7 KiB
PHP
112 lines
2.7 KiB
PHP
<?php
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/*********************************************************************************
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** The contents of this file are subject to the vtiger CRM Public License Version 1.0
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* ("License"); You may not use this file except in compliance with the License
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* The Original Code is: vtiger CRM Open Source
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* The Initial Developer of the Original Code is vtiger.
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* Portions created by vtiger are Copyright (C) vtiger.
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* All Rights Reserved.
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*
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********************************************************************************/
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class Encryption
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{
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function encrypt($message)
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{
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//converting a string to binary
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$enc_message = $this->asc2bin($message);
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$enc_message = $this -> xor_string($enc_message);
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$enc_message = $this -> urlsafe_b64encode($enc_message);
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return $enc_message;
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}
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function asc2bin($inputString, $byteLength=8)
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{
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$binaryOutput = '';
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$strSize = strlen($inputString);
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for($x=0; $x<$strSize; $x++)
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{
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$charBin = decbin(ord($inputString{$x}));
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$charBin = str_pad($charBin, $byteLength, '0', STR_PAD_LEFT);
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$binaryOutput .= $charBin;
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}
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return $binaryOutput;
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}
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function bin2asc($binaryInput, $byteLength=8)
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{
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if (strlen($binaryInput) % $byteLength)
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{
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return false;
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}
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// why run strlen() so many times in a loop? Use of constants = speed increase.
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$strSize = strlen($binaryInput);
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$origStr = '';
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// jump between bytes.
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for($x=0; $x<$strSize; $x += $byteLength)
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{
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// extract character's binary code
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$charBinary = substr($binaryInput, $x, $byteLength);
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$origStr .= chr(bindec($charBinary)); // conversion to ASCII.
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}
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return $origStr;
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}
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function decrypt($message)
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{
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$dec_message = $this -> urlsafe_b64decode($message);
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$dec_message = $this -> xor_string($dec_message);
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$dec_message = $this->bin2asc($dec_message);
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return $dec_message;
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}
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function xor_string($string)
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{
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$buf = '';
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$size = strlen($string);
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for ($i=0; $i<$size; $i++)
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$buf .= chr(ord($string[$i]) ^ 255);
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return $buf;
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}
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function urlsafe_b64encode($string)
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{
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$data = base64_encode($string);
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$data = str_replace(array('+','/','='),array('-','_','.'),$data);
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return $data;
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}
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function urlsafe_b64decode($string)
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{
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$data = str_replace(array('-','_'),array('+','/'),$string);
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$mod4 = strlen($data) % 4;
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if ($mod4)
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{
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$data .= substr('====', $mod4);
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}
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return base64_decode($data);
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}
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function x_Encrypt($string, $key)
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{
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for($i=0; $i<strlen($string); $i++)
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{
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for($j=0; $j<strlen($key); $j++)
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{
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$string[$i] = $string[$i]^$key[$j];
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}
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}
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return $string;
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}
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function x_Decrypt($string, $key)
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{
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for($i=0; $i<strlen($string); $i++)
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{
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for($j=0; $j<strlen($key); $j++)
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{
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$string[$i] = $key[$j]^$string[$i];
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}
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}
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return $string;
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}
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}
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