Create a Cryptography Class
(Appendix C, Cryptography - Pg 99-100)
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<?php
class crypt
{
private $algorithm;
private $mode;
private $random_source;
public $cleartext;
public $ciphertext;
public $iv;
public function __construct($algorithm = MCRYPT_BLOWFISH,
$mode = MCRYPT_MODE_CBC,
$random_source = MCRYPT_DEV_URANDOM)
{
$this->algorithm = $algorithm;
$this->mode = $mode;
$this->random_source = $random_source;
}
public function generate_iv()
{
$this->iv = mcrypt_create_iv(mcrypt_get_iv_size($this->algorithm,
$this->mode), $this->random_source);
}
public function encrypt()
{
$this->ciphertext = mcrypt_encrypt($this->algorithm,
$_SERVER['CRYPT_KEY'], $this->cleartext,
$this->mode, $this->iv);
}
public function decrypt()
{
$this->cleartext = mcrypt_decrypt($this->algorithm,
$_SERVER['CRYPT_KEY'], $this->ciphertext,
$this->mode, $this->iv);
}
}
?>
