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2021-01-11
PHP
class DES
{
var $key='123456';
var $iv='654321';
function DES($key,$iv=0)
{
$this->key = $key;
if($iv == 0)
{
$this->iv = $key;
}
else
{
$this->iv = $iv;
}
}
function encrypt($str)
{
$size = mcrypt_get_block_size ( MCRYPT_DES, MCRYPT_MODE_CBC );
$str = $this->Pkcs5Pad ( $str, $size );
$data = mcrypt_encrypt(MCRYPT_DES,$this->key, $str, "cbc", $this->iv);
return base64_encode($data);
}
function decrypt($str)
{
$str = base64_decode ($str);
$str = mcrypt_decrypt(MCRYPT_DES, $this->key, $str, "cbc", $this->iv );
$str = $this->pkcs5Unpad( $str );
return $str;
}
function hex2bin($hexData)
{
$binData = "";
for($i = 0; $i < strlen ( $hexData ); $i += 2)
{
$binData .= chr(hexdec(substr($hexData, $i, 2)));
}
return $binData;
}
function pkcs5Pad($text, $blocksize)
{
$pad = $blocksize - (strlen ( $text ) % $blocksize);
return $text . str_repeat ( chr ( $pad ), $pad );
}
function pkcs5Unpad($text)
{
$pad = ord ( $text {strlen ( $text ) - 1} );
if ($pad > strlen ( $text ))
return false;
if (strspn ( $text, chr ( $pad ), strlen ( $text ) - $pad ) != $pad)
return false;
return substr ( $text, 0, - 1 * $pad );
}
}
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