/**
* Encrypts the given data with the given password.
*
* @param string $data The data to encrypt.
* @param string $password The password to encrypt data with.
* @return array Returns an array containing the encrypted data and some information like the IV if used.
* 0 => [string] encrypted data
* 1 => [string] password as hex string
* 2 => [int] options used (the bitwise disjunction value)
* 3 => [string] iv used for encryption
* 4 => [int] cipher mode used
* @see http://php.net/manual/en/function.openssl-encrypt.php openssl_encrypt function reference
* @throws OpenSSLException when the cipher cannot encrypt the data.
* @since 0.3.5
*/
public function encrypt(string $data, string $password) : array
{
OpenSSL::resetErrors();
if (($encrypted = @openssl_encrypt($data, $this->getCipherDescription(), $password, $this->getOptions(), $this->getIV())) === false) {
// @codeCoverageIgnoreStart
throw new OpenSSLException(OpenSSL::getErrors(), 'The given data could not be encrypted.');
// @codeCoverageIgnoreEnd
}
return [$encrypted, StringEncoder::rawToHex($password), $this->getOptions(), $this->getIV(), $this->getMode()];
}
/**
* Makes a hexadecimal token using the configured length.
* Important: The alphabet is not used with this method. Output chars are [0-1][a-f].
* The length is the length of the resulting hex string (it is not the length in bytes, though it may match).
*
* @see http://php.net/manual/en/function.random-bytes.php Generates cryptographically secure pseudo-random bytes
* @return string Returns the generated hex token in lowercase.
* @since 0.1
*/
public function makeHex() : string
{
$bytes = random_bytes((int) round($this->length / 2, 0, PHP_ROUND_HALF_UP));
$token = StringEncoder::rawToHex($bytes);
return substr($token, 0, $this->length);
}