friendica-addons/securemail/vendor/singpolyma/openpgp-php/lib/openpgp_mcrypt_wrapper.php

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<?php
if(function_exists('mcrypt_encrypt') && defined('MCRYPT_MODE_CFB')) {
class MCryptWrapper {
public $cipher, $key, $iv, $key_size, $block_size;
function __construct($cipher) {
$this->cipher = $cipher;
$this->key_size = mcrypt_module_get_algo_key_size($cipher);
$this->block_size = mcrypt_module_get_algo_block_size($cipher);
$this->iv = str_repeat("\0", mcrypt_get_iv_size($cipher, 'ncfb'));
}
function getBlockLengthInBytes()
{
return $this->block_size;
}
function getKeyLength() {
return $this->key_size << 3;
}
function setKey($key) {
$this->key = $key;
}
function setIV($iv) {
$this->iv = $iv;
}
function encrypt($data) {
return mcrypt_encrypt($this->cipher, $this->key, $data, 'ncfb', $this->iv);
}
function decrypt($data) {
return mcrypt_decrypt($this->cipher, $this->key, $data, 'ncfb', $this->iv);
}
}
}