Php Function (mcrypt_encrypt) 사용법 - 업데이트 예정임.

[1] lib설치

apt-get install libmcrypt4 php4-mcrypt

[2] 사용하면됨.

  6    echo function_exists("mcrypt_decrypt");
  7    echo function_exists("mcrypt_encrypt");


이렇게 함수를 만들어서 call해보면된다.

[3] 사용예제
For those of you that need to use PKCS#5 padding, the mcrypt API's for PHP do not support it.  However, you can DIY using the following:

<?

function encrypt_something($input)
{
    $size = mcrypt_get_block_size('des', 'ecb');
    $input = pkcs5_pad($input, $size);
   
    $key = 'YOUR SECRET KEY HERE';
    $td = mcrypt_module_open('des', '', 'ecb', '');
    $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
    mcrypt_generic_init($td, $key, $iv);
    $data = mcrypt_generic($td, $input);
    mcrypt_generic_deinit($td);
    mcrypt_module_close($td);
    $data = base64_encode($data);
    return $data;
}

function pkcs5_pad ($text, $blocksize)
{
    $pad = $blocksize - (strlen($text) % $blocksize);
    return $text . str_repeat(chr($pad), $pad);
}

function pkcs5_unpad($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);
}
?>

[4] 첨부파일 다운로드 [사용예제]

class.Crypto.php