로그인 함 해보끄나?

Last Modify : 13 January, 2011(01:25)
php
<?php 
 
//
// 기본 키 값
//
$key		= "YourTripleDesKeyValues00";		// 24 bit Key
$iv			= "initalvt";						// 8 bit IV
$input		= "Text to encrypt";				// text to encrypt
$bit_check	= 8;								// bit amount for diff algor.
 
 
//
// 테스트
//
$str = encrypt($input,$key,$iv,$bit_check);
 
echo "Start: $input<br />";
echo "Encrypted: $str <br />";
echo "Decrypted: ". decrypt($str,$key,$iv,$bit_check);
 
 
//
// 관련 함수
//
 
function hex2text($str)
{
    $str = explode('%', $str);
    array_shift($str);
    $nmlstr = '';
    foreach($str as $hexstr) {
      $nmlstr .= chr(base_convert($hexstr, 16, 10));
    }    
    return $nmlstr;
}
 
function StringToHex($szValue)
{
	$szTemp = "";
 
	for($i=0; $i<strlen($szValue); ++$i)
	{
		$szTemp .= bin2hex($szValue[$i]);
	}
 
	return $szTemp;
}
 
function hex2bin($str)
{
    $bin = "";
    $i = 0;
 
	do
	{
        $bin .= chr(hexdec($str{$i}.$str{($i + 1)}));
        $i += 2;
    }
	while ($i < strlen($str));
 
    return $bin;
}
 
function HexToString($szValue)
{
	$szTemp = "";
 
	for($i=0; $i<strlen($szValue); ++$i)
	{
		$szTemp .= hex2bin($szValue[$i++].$szValue[$i]);
	}
 
	return $szTemp;
}
 
function encrypt($text,$key,$iv,$bit_check)
{
	$text_num = str_split($text, $bit_check);
	$text_num = $bit_check-strlen($text_num[count($text_num)-1]);
 
	for ($i=0;$i<$text_num; $i++)
		$text = $text . chr($text_num);
 
	$cipher = mcrypt_module_open(MCRYPT_TRIPLEDES,'','ecb','');
	mcrypt_generic_init($cipher, $key, $iv);
	$decrypted = mcrypt_generic($cipher,$text);
	mcrypt_generic_deinit($cipher);
	mcrypt_module_close($cipher);
 
	return strtoupper(StringToHex($decrypted));
}
 
function decrypt($encrypted_text,$key,$iv,$bit_check)
{
	$encrypted_text = HexToString(strtolower($encrypted_text));
 
	$cipher = mcrypt_module_open(MCRYPT_TRIPLEDES,'','ecb','');
	mcrypt_generic_init($cipher, $key, $iv);
	$decrypted = mdecrypt_generic($cipher,$encrypted_text);
	mcrypt_generic_deinit($cipher);
	mcrypt_module_close($cipher);
	$last_char=substr($decrypted,-1);
 
	for($i=0; $i<$bit_check-1 ; $i++)
	{
		if(chr($i) == $last_char)
		{
			$decrypted = substr($decrypted, 0, strlen($decrypted) - $i);
			break;
		}
	}
 
	return $decrypted;
}
?>