<?php
class Cipher{
var $cipher,
$data,
$iv,
$key,
$mode,
$td;
function Cipher( $key, $cipher=MCRYPT_RIJNDAEL_256, $mode=MCRYPT_MODE_CFB, $cipher_dir='',
$mode_dir='' ){
$this->key = $key;
$this->cipher = $cipher;
$this->mode = $mode;
$this->cipher_dir = $cipher_dir;
$this->mode_dir = $mode_dir;
# Open the modules to support the chosen cipher and mode
$this->td = mcrypt_module_open( $this->cipher, $this->cipher_dir, $this->mode,
$this->mode_dir );
# Create an initialization vector for the open modules from a random source
$this->iv = mcrypt_create_iv( mcrypt_enc_get_iv_size($this->td), MCRYPT_DEV_RANDOM );
}
function init(){
# Initialize the buffers required for encryption/decryption
mcrypt_generic_init ($this->td, $this->key, $this->iv);
}
function Encrypt( $data ){
$this->init();
return mcrypt_generic( $this->td, $data );
}
function Decrypt( $encrypted_data ){
$this->init();
return mdecrypt_generic( $this->td, $encrypted_data );
}
function Cleanup(){
mcrypt_generic_deinit( $this->td );
mcrypt_module_close( $this->td );
}
}
/* Cipher Test
$cipher = new Cipher('boo');
$enc_data = $cipher->Encrypt("J. Random Data");
echo "Encrypted data: ", $enc_data, "\n";
$dec_data = $cipher->Decrypt($enc_data);
echo "Decrypted data: ", $dec_data, "\n";
$cipher->Cleanup();
*/
?>
