function decrypt(string $key, string $nonce, string $aad, string $ciphertext, string $tag) : string
{
$cipher = new Cipher();
$context = $cipher->init($key, $nonce);
$cipher->aad($context, $aad);
$plaintext = $cipher->decrypt($context, $ciphertext);
$cipher->finish($context, $tag);
return $plaintext;
}
function Get($Setting)
{
if (isset($_SESSION[$this->SessionName][$Setting]) && !empty($_SESSION[$this->SessionName][$Setting])) {
if ($this->encrypted) {
return Cipher::decrypt($_SESSION[$this->SessionName][$Setting]);
} else {
return $_SESSION[$this->SessionName][$Setting];
}
} else {
return '';
}
}
public static function get($name, $config = NULL)
{
$config = $config ?: config()->cookie;
if (isset($_COOKIE[$name])) {
if ($v = json_decode(Cipher::decrypt(base64_decode($_COOKIE[$name]), $config['key']))) {
if ($v[0] < $config['timeout']) {
return is_scalar($v[1]) ? $v[1] : (array) $v[1];
}
}
}
return FALSE;
}
/**
* Decrypt and fetch cookie data
*
* @param string $name of cookie
* @param array $config settings
* @return mixed
*/
public static function get($name, $config = NULL)
{
// Use default config settings if needed
$config = $config ?: static::$settings;
if (isset($_COOKIE[$name])) {
// Decrypt cookie using cookie key
if ($v = json_decode(Cipher::decrypt(base64_decode($_COOKIE[$name]), $config['key']))) {
// Has the cookie expired?
if ($v[0] < $config['timeout']) {
return is_scalar($v[1]) ? $v[1] : (array) $v[1];
}
}
}
return FALSE;
}
function decrypt_api_key($key)
{
global $api_scramble_key;
if (extension_loaded('mcrypt') && extension_loaded('hash')) {
$cipher = new Cipher($api_scramble_key);
$key = $cipher->decrypt($key);
} else {
$key = convert(base64_decode(strtr($key, '-_,', '+/=')), $api_scramble_key);
}
return explode("|", $key);
}
/**
* @param string
* @return string
*/
public function decrypt($data)
{
return $this->impl->decrypt($data);
}
/**
* AES暗号形式で暗号化されたデータを複号化する
* @param $argValue デコードする値
* @param $argKey 暗号キー
* @param $argIv IV
* @return $encrypt 複号化データ
*/
public static function decryptAES($argValue, $argKey, $argIV = null, $argPrefix = '', $argSuffix = '')
{
// パラメータセット
// XXX パラメータは定数で可変出来るようにする
$params = array('value' => $argValue, 'key' => $argKey, 'iv' => $argIV, 'algorithm' => 'rijndael-128', 'mode' => 'cbc', 'prefix' => $argPrefix, 'suffix' => $argSuffix);
// データを暗号化する
$decrypt = Cipher::decrypt($params);
// エラー処理
if (false === $decrypt || NULL === $decrypt) {
return false;
}
return $decrypt;
}
require_once "PEAR.php";
require_once "Crypt/RSA.php";
require_once "extensions/PageProtection/Cipher.php";
$plaintext = "This is plaintext.";
/* create object */
$c = new Cipher();
if ($c->has_error()) {
print "Error: " . $c->get_last_error() . "\n";
exit;
}
/* encrypt message using default cipher */
$encrypted = $c->encrypt($plaintext);
if ($c->has_error()) {
print "Error: " . $c->get_last_error() . "\n";
exit;
}
/* get parameters used during encyprion proccess */
$key = $c->mLastKey;
$iv = $c->mLastIV;
$cipher = $c->mLastCipher;
/* decrypt the encrypted message using obtained values */
$result = $c->decrypt($encrypted, $cipher, $key, $iv);
if ($c->has_error()) {
print "Error: " . $c->get_last_error() . "\n";
exit;
}
/* display results */
print "algorithm: {$cipher}\n";
print "previous key: " . base64_encode($key) . "\n";
print "previous IV: " . base64_encode($iv) . "\n\n";
print "plaintext: {$result}\n";
}
function encrypt($input)
{
return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->securekey, $input, MCRYPT_MODE_ECB, $this->iv));
}
function decrypt($input)
{
return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $this->securekey, base64_decode($input), MCRYPT_MODE_ECB, $this->iv));
}
}
//Check if its a default installation.
if (isset($_POST['wwdb'])) {
if ($_POST['wwdb'] == "1") {
//Get details from decrypter
$cipher = new Cipher('transferDB@321');
$decryptedtext = $cipher->decrypt($_POST['hiddenstuff']);
$dbDetails = unserialize($decryptedtext);
$dbhost = $dbDetails['host'];
$dbUname = $dbDetails['database_username'];
$dbPassword = $dbDetails['database_password'];
$dbName = $_POST['ConfigName'];
} else {
$dbhost = $_POST['databasehost'];
$dbUname = $_POST['databaseusername'];
$dbPassword = $_POST['databasepassword'];
$dbName = $_POST['databasename'];
}
} else {
$dbhost = $_POST['databasehost'];
$dbUname = $_POST['databaseusername'];
$dbPassword = $_POST['databasepassword'];
/**
* Decrypt the given value so that it's readable again.
*
* @param string $value
*
* @return string
*/
public function decrypt($value)
{
return parent::decrypt($this->hex2bin($value));
}
$encrypt = bin2hex($encrypt);
$iv = bin2hex($iv);
}
} elseif ("decrypt" === $_GET["mode"]) {
// 復号処理
$encrypt = $val;
if ("base64" === $_GET["format"]) {
$encrypt = base64_decode($encrypt);
$iv = base64_decode($iv);
} elseif ("hex" === $_GET["format"]) {
$encrypt = pack("H*", $encrypt);
$iv = pack("H*", $iv);
}
$params['value'] = $encrypt;
$params['iv'] = $iv;
$decrypt = Cipher::decrypt($params);
if ("base64" === $_GET["format"]) {
$encrypt = base64_encode($encrypt);
$iv = base64_encode($iv);
} elseif ("hex" === $_GET["format"]) {
$encrypt = bin2hex($encrypt);
$iv = bin2hex($iv);
}
}
$responce = "<br/>";
$responce .= "入出力フォーマット:" . $_GET["format"] . "<br/>";
$responce .= "IV:「" . $iv . "」<br/>";
$responce .= "Key:「" . $key . "」<br/>";
$responce .= "decrypt:「" . $decrypt . "」<br/>";
$responce .= "encrypt:「" . $encrypt . "」<br/>";
}
<?php
include '../core/Page.php';
$c = new Cipher('aabb');
echo $c->encrypt('Poopie');
echo '<HR>';
echo $c->decrypt($c->encrypt('Poopie'));
<?php
/**
* Created by PhpStorm.
* User: USER
* Date: 7/6/2015
* Time: 20:28
*/
class Cipher
{
private $securekey, $iv;
function __construct($textkey)
{
$this->securekey = hash('sha256', $textkey, TRUE);
$this->iv = mcrypt_create_iv(32);
}
function encrypt($input)
{
return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->securekey, $input, MCRYPT_MODE_ECB, $this->iv));
}
function decrypt($input)
{
return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $this->securekey, base64_decode($input), MCRYPT_MODE_ECB, $this->iv));
}
}
$cipher = new Cipher('secret passphrase');
$encryptedtext = $cipher->encrypt("hide me");
echo "->encrypt = {$encryptedtext}<br />";
$decryptedtext = $cipher->decrypt($encryptedtext);
echo "->decrypt = {$decryptedtext}<br />";
var_dump($cipher);
/**
* Decrypt and fetch cookie data as long as the cookie has not expired
*
* @param string $name of cookie
* @param array $config settings
* @return mixed
*/
public static function get($name, $config = NULL)
{
if (isset($_COOKIE[$name])) {
if ($value = json_decode(Cipher::decrypt($_COOKIE[$name], $config['key']), TRUE)) {
if ($value[0] < time() + $config['timeout']) {
return $value[1];
}
}
}
return FALSE;
}
