/**
* Generate a UUID v4
*
* @return string
*/
private function uuid_v4()
{
$randval = new RandomValue();
$data = $randval->generate(16);
$data[6] = chr(ord($data[6]) & 0xf | 0x40);
// set version to 0100
$data[8] = chr(ord($data[8]) & 0x3f | 0x80);
// set bits 6-7 to 10
return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
}
public function encrypt($plainText, $key, $iv = null)
{
$iv_size = $this->getBlockSize();
$key = $this->resizeKey($key, $iv_size);
$iv = $this->resizeKey($iv, $iv_size);
if (empty($iv)) {
$randVal = new RandomValue();
$iv = $randVal->generate($iv_size);
}
$cipherText = mcrypt_encrypt($this->cipherType, $key, $plainText, $this->cipherMode, $iv);
$cipherText = $iv . $cipherText;
return $cipherText;
}
public function encrypt($plainText, $key, $iv = null)
{
$iv_size = $this->getBlockSize();
$key = $this->resizeKey($key, $iv_size);
$iv = $this->resizeKey($iv, $iv_size);
if (empty($iv)) {
$randVal = new RandomValue();
$iv = $randVal->generate($iv_size);
}
$plainText .= $this->getZeroPadding($plainText, $iv_size);
$cipherText = openssl_encrypt($plainText, $this->method, $key, $this->openSSLOptions, $iv);
$cipherText = $iv . $cipherText;
return $cipherText;
}
/**
* AES encryption in CBC mode. This is the standard mode (the CTR methods
* actually use Rijndael-128 in CTR mode, which - technically - isn't AES).
* The data length is tucked as a 32-bit unsigned integer (little endian)
* after the ciphertext. It supports AES-128 only.
*
* @since 3.0.1
* @author Nicholas K. Dionysopoulos
*
* @param string $plaintext The data to encrypt
* @param string $password Encryption password
* @param bool $legacy Enable legacy mode (insecure initialization vector)
*
* @return string The ciphertext
*/
public function AESEncryptCBC($plaintext, $password, $legacy = false)
{
$adapter = $this->getAdapter();
if (!$adapter->isSupported()) {
return false;
}
// Get the expanded key from the password
$key = $this->expandKey($password);
// Create an IV
$rand = new RandomValue();
$iv = $rand->generate(16);
if ($legacy) {
$iv = $this->createTheWrongIV($password);
}
// The ciphertext is the encrypted string...
$ciphertext = $adapter->encrypt($plaintext, $key, $iv);
// ...minus the IV which was placed in front
$ciphertext = substr($ciphertext, 16);
// ...plus the IV at the end...
if (!$legacy) {
$ciphertext .= 'JPIV' . $iv;
}
// ...plus the plaintext length.
$ciphertext .= pack('V', strlen($plaintext));
return $ciphertext;
}
