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<?php |
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/** |
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* This file is part of the O2System Framework package. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @author Steeve Andrian Salim |
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* @copyright Copyright (c) Steeve Andrian Salim |
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*/ |
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// ------------------------------------------------------------------------ |
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namespace O2System\Security\Encryptions; |
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// ------------------------------------------------------------------------ |
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use O2System\Spl\Exceptions\Logic\BadFunctionCall\BadPhpExtensionCallException; |
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use O2System\Spl\Exceptions\Logic\BadFunctionCallException; |
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/** |
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* Class Crypt |
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* |
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* Provides two-way keyed encryption via PHP's MCrypt and/or OpenSSL extensions. |
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* Based-on CodeIgniter v3.x.x Encryption library class. |
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* |
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* @author Andrey Andreev |
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* Steeve Andrian Salim |
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* @package O2System\Security\Encryptions |
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*/ |
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class Crypt |
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{ |
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/** |
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* mbstring.func_override flag |
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* |
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* @var bool |
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*/ |
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protected static $isFunctionOverride; |
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/** |
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* Encryption cipher |
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* |
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* @var string |
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*/ |
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protected $cipher = 'aes-128'; |
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/** |
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* Cipher mode |
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* |
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* @var string |
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*/ |
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protected $mode = 'cbc'; |
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/** |
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* Cipher handle |
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* |
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* @var mixed |
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*/ |
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protected $handle; |
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/** |
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* Encryption key |
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* |
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* @var string |
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*/ |
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protected $key; |
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/** |
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* PHP extension to be used |
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* |
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* @var string |
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*/ |
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protected $driver; |
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/** |
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* List of usable drivers (PHP extensions) |
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* |
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* @var array |
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*/ |
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protected $drivers = []; |
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/** |
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* List of available modes |
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* |
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* @var array |
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*/ |
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protected $modes |
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= [ |
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'mcrypt' => [ |
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'cbc' => 'cbc', |
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'ecb' => 'ecb', |
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'ofb' => 'nofb', |
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'ofb8' => 'ofb', |
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'cfb' => 'ncfb', |
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'cfb8' => 'cfb', |
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'ctr' => 'ctr', |
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'stream' => 'stream', |
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], |
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'openssl' => [ |
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'cbc' => 'cbc', |
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'ecb' => 'ecb', |
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'ofb' => 'ofb', |
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'cfb' => 'cfb', |
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'cfb8' => 'cfb8', |
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'ctr' => 'ctr', |
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'stream' => '', |
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'xts' => 'xts', |
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], |
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]; |
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/** |
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* List of supported HMAC algorithms |
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* |
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* name => digest size pairs |
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* |
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* @var array |
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*/ |
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protected $digests |
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= [ |
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'sha224' => 28, |
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'sha256' => 32, |
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'sha384' => 48, |
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'sha512' => 64, |
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]; |
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// -------------------------------------------------------------------- |
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/** |
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* Crypt::__construct |
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* |
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* @param array $params |
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* |
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* @throws \O2System\Spl\Exceptions\Logic\BadFunctionCall\BadPhpExtensionCallException |
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*/ |
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public function __construct(array $params = []) |
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{ |
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$this->drivers = [ |
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'mcrypt' => defined('MCRYPT_DEV_URANDOM'), |
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'openssl' => extension_loaded('openssl'), |
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]; |
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if ( ! $this->drivers[ 'mcrypt' ] && ! $this->drivers[ 'openssl' ]) { |
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//Encryption: Unable to find an available encryption driver. |
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throw new BadPhpExtensionCallException('E_SECURITY_CRYPT_UNABLE_TO_FIND_DRIVER'); |
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} |
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isset(self::$isFunctionOverride) OR |
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self::$isFunctionOverride = (extension_loaded('mbstring') && ini_get('mbstring.func_override')); |
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$this->initialize($params); |
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$key = get_called_class(); |
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if (class_exists('\O2System\Framework', false) or class_exists('\O2System\Reactor', false)) { |
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$key = config()->getItem('security')->offsetGet('encryptionKey'); |
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} |
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if ( ! isset($this->key) && self::strlen($key) > 0) { |
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$this->key = $key; |
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} |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Initialize |
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* |
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* @param array $params Configuration parameters |
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* |
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* @return static |
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* @throws \O2System\Spl\Exceptions\Logic\BadFunctionCall\BadPhpExtensionCallException |
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*/ |
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public function initialize(array $params) |
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{ |
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if ( ! empty($params[ 'driver' ])) { |
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if (isset($this->drivers[ $params[ 'driver' ] ])) { |
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if ($this->drivers[ $params[ 'driver' ] ]) { |
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$this->driver = $params[ 'driver' ]; |
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} else { |
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//"Encryption: Driver '" . $params[ 'driver' ] . "' is not available." |
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throw new BadPhpExtensionCallException( |
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'E_SECURITY_CRYPT_DRIVER_NOT_AVAILABLE', $params[ 'driver' ] |
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); |
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} |
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} else { |
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// "Encryption: Unknown driver '" . $params[ 'driver' ] . "' cannot be configured." |
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throw new BadPhpExtensionCallException( |
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'E_SECURITY_CRYPT_DRIVER_NOT_CONFIGURED', |
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0, |
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[$params[ 'driver' ]] |
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); |
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} |
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} |
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if (empty($this->driver)) { |
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$this->driver = ($this->drivers[ 'openssl' ] === true) |
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? 'openssl' |
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: 'mcrypt'; |
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} |
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empty($params[ 'cipher' ]) && $params[ 'cipher' ] = $this->cipher; |
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empty($params[ 'key' ]) OR $this->key = $params[ 'key' ]; |
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$this->{$this->driver . 'Initialize'}($params); |
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return $this; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Byte-safe strlen() |
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* |
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* @param string $str |
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* |
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* @return int |
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*/ |
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protected static function strlen($str) |
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{ |
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return (self::$isFunctionOverride) |
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? mb_strlen($str, '8bit') |
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: strlen($str); |
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} |
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// -------------------------------------------------------------------- |
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public function setKey($key) |
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{ |
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$this->key = $key; |
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return $this; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Encrypt |
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* |
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* @param string $data Input data |
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* @param array $params Input parameters |
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* |
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* @return string |
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*/ |
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public function encrypt($data, array $params = null) |
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{ |
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if (($params = $this->getParams($params)) === false) { |
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return false; |
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} |
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isset($params[ 'key' ]) OR |
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$params[ 'key' ] = $this->hkdf($this->key, 'sha512', null, self::strlen($this->key), 'encryption'); |
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if (($data = $this->{$this->driver . 'Encrypt'}($data, $params)) === false) { |
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return false; |
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} |
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$params[ 'base64' ] && $data = base64_encode($data); |
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if (isset($params[ 'hmac_digest' ])) { |
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isset($params[ 'hmac_key' ]) OR |
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$params[ 'hmac_key' ] = $this->hkdf($this->key, 'sha512', null, null, 'authentication'); |
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return hash_hmac($params[ 'hmac_digest' ], $data, $params[ 'hmac_key' ], ! $params[ 'base64' ]) . $data; |
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} |
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return $data; |
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} |
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/** |
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* Get params |
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* |
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* @param array $params Input parameters |
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* |
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* @return array|bool |
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*/ |
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protected function getParams($params) |
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{ |
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if (empty($params)) { |
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return isset($this->cipher, $this->mode, $this->key, $this->handle) |
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? [ |
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'handle' => $this->handle, |
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'cipher' => $this->cipher, |
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'mode' => $this->mode, |
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'key' => null, |
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'base64' => true, |
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'hmac_digest' => 'sha512', |
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'hmac_key' => null, |
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] |
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: false; |
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} elseif ( ! isset($params[ 'cipher' ], $params[ 'mode' ], $params[ 'key' ])) { |
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return false; |
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} |
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if (isset($params[ 'mode' ])) { |
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$params[ 'mode' ] = strtolower($params[ 'mode' ]); |
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if ( ! isset($this->modes[ $this->driver ][ $params[ 'mode' ] ])) { |
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return false; |
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} else { |
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$params[ 'mode' ] = $this->modes[ $this->driver ][ $params[ 'mode' ] ]; |
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} |
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} |
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if (isset($params[ 'hmac' ]) && $params[ 'hmac' ] === false) { |
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$params[ 'hmac_digest' ] = $params[ 'hmac_key' ] = null; |
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} else { |
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if ( ! isset($params[ 'hmac_key' ])) { |
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return false; |
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} elseif (isset($params[ 'hmac_digest' ])) { |
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$params[ 'hmac_digest' ] = strtolower($params[ 'hmac_digest' ]); |
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if ( ! isset($this->digests[ $params[ 'hmac_digest' ] ])) { |
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return false; |
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} |
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} else { |
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$params[ 'hmac_digest' ] = 'sha512'; |
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} |
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} |
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$params = [ |
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'handle' => null, |
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'cipher' => $params[ 'cipher' ], |
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'mode' => $params[ 'mode' ], |
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'key' => $params[ 'key' ], |
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'base64' => isset($params[ 'raw_data' ]) |
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? ! $params[ 'raw_data' ] |
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: false, |
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'hmac_digest' => $params[ 'hmac_digest' ], |
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'hmac_key' => $params[ 'hmac_key' ], |
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]; |
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$this->cipherAlias($params[ 'cipher' ]); |
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$params[ 'handle' ] = ($params[ 'cipher' ] !== $this->cipher OR $params[ 'mode' ] !== $this->mode) |
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? $this->{$this->driver . 'GetHandle'}($params[ 'cipher' ], $params[ 'mode' ]) |
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: $this->handle; |
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return $params; |
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} |
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328
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// -------------------------------------------------------------------- |
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/** |
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* Cipher alias |
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332
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* |
|
333
|
|
|
* Tries to translate cipher names between MCrypt and OpenSSL's "dialects". |
|
334
|
|
|
* |
|
335
|
|
|
* @param string $cipher Cipher name |
|
336
|
|
|
* |
|
337
|
|
|
* @return void |
|
338
|
|
|
*/ |
|
339
|
|
|
protected function cipherAlias(&$cipher) |
|
340
|
|
|
{ |
|
341
|
|
|
static $dictionary; |
|
342
|
|
|
|
|
343
|
|
|
if (empty($dictionary)) { |
|
344
|
|
|
$dictionary = [ |
|
345
|
|
|
'mcrypt' => [ |
|
346
|
|
|
'aes-128' => 'rijndael-128', |
|
347
|
|
|
'aes-192' => 'rijndael-128', |
|
348
|
|
|
'aes-256' => 'rijndael-128', |
|
349
|
|
|
'des3-ede3' => 'tripledes', |
|
350
|
|
|
'bf' => 'blowfish', |
|
351
|
|
|
'cast5' => 'cast-128', |
|
352
|
|
|
'rc4' => 'arcfour', |
|
353
|
|
|
'rc4-40' => 'arcfour', |
|
354
|
|
|
], |
|
355
|
|
|
'openssl' => [ |
|
356
|
|
|
'rijndael-128' => 'aes-128', |
|
357
|
|
|
'tripledes' => 'des-ede3', |
|
358
|
|
|
'blowfish' => 'bf', |
|
359
|
|
|
'cast-128' => 'cast5', |
|
360
|
|
|
'arcfour' => 'rc4-40', |
|
361
|
|
|
'rc4' => 'rc4-40', |
|
362
|
|
|
], |
|
363
|
|
|
]; |
|
364
|
|
|
|
|
365
|
|
|
// Notes: |
|
366
|
|
|
// |
|
367
|
|
|
// - Rijndael-128 is, at the same time all three of AES-128, |
|
368
|
|
|
// AES-192 and AES-256. The only difference between them is |
|
369
|
|
|
// the key size. Rijndael-192, Rijndael-256 on the other hand |
|
370
|
|
|
// also have different block sizes and are NOT AES-compatible. |
|
371
|
|
|
// |
|
372
|
|
|
// - Blowfish is said to be supporting key sizes between |
|
373
|
|
|
// 4 and 56 bytes, but it appears that between MCrypt and |
|
374
|
|
|
// OpenSSL, only those of 16 and more bytes are compatible. |
|
375
|
|
|
// Also, don't know what MCrypt's 'blowfish-compat' is. |
|
376
|
|
|
// |
|
377
|
|
|
// - CAST-128/CAST5 produces a longer cipher when encrypted via |
|
378
|
|
|
// OpenSSL, but (strangely enough) can be decrypted by either |
|
379
|
|
|
// extension anyway. |
|
380
|
|
|
// Also, it appears that OpenSSL uses 16 rounds regardless of |
|
381
|
|
|
// the key size, while RFC2144 says that for key sizes lower |
|
382
|
|
|
// than 11 bytes, only 12 rounds should be used. This makes |
|
383
|
|
|
// it portable only with keys of between 11 and 16 bytes. |
|
384
|
|
|
// |
|
385
|
|
|
// - RC4 (ARCFour) has a strange implementation under OpenSSL. |
|
386
|
|
|
// Its 'rc4-40' cipher method seems to work flawlessly, yet |
|
387
|
|
|
// there's another one, 'rc4' that only works with a 16-byte key. |
|
388
|
|
|
// |
|
389
|
|
|
// - DES is compatible, but doesn't need an alias. |
|
390
|
|
|
// |
|
391
|
|
|
// Other seemingly matching ciphers between MCrypt, OpenSSL: |
|
392
|
|
|
// |
|
393
|
|
|
// - RC2 is NOT compatible and only an obscure forum post |
|
394
|
|
|
// confirms that it is MCrypt's fault. |
|
395
|
|
|
} |
|
396
|
|
|
|
|
397
|
|
|
if (isset($dictionary[ $this->driver ][ $cipher ])) { |
|
398
|
|
|
$cipher = $dictionary[ $this->driver ][ $cipher ]; |
|
399
|
|
|
} |
|
400
|
|
|
} |
|
401
|
|
|
|
|
402
|
|
|
// -------------------------------------------------------------------- |
|
403
|
|
|
|
|
404
|
|
|
/** |
|
405
|
|
|
* HKDF |
|
406
|
|
|
* |
|
407
|
|
|
* @link https://tools.ietf.org/rfc/rfc5869.txt |
|
408
|
|
|
* |
|
409
|
|
|
* @param $key Input key |
|
|
|
|
|
|
410
|
|
|
* @param $digest A SHA-2 hashing algorithm |
|
411
|
|
|
* @param $salt Optional salt |
|
|
|
|
|
|
412
|
|
|
* @param $length Output length (defaults to the selected digest size) |
|
|
|
|
|
|
413
|
|
|
* @param $info Optional context/application-specific info |
|
414
|
|
|
* |
|
415
|
|
|
* @return string A pseudo-random key |
|
416
|
|
|
*/ |
|
417
|
|
|
public function hkdf($key, $digest = 'sha512', $salt = null, $length = null, $info = '') |
|
418
|
|
|
{ |
|
419
|
|
|
if ( ! isset($this->digests[ $digest ])) { |
|
420
|
|
|
return false; |
|
|
|
|
|
|
421
|
|
|
} |
|
422
|
|
|
|
|
423
|
|
|
if (empty($length) OR ! is_int($length)) { |
|
424
|
|
|
$length = $this->digests[ $digest ]; |
|
425
|
|
|
} elseif ($length > (255 * $this->digests[ $digest ])) { |
|
426
|
|
|
return false; |
|
|
|
|
|
|
427
|
|
|
} |
|
428
|
|
|
|
|
429
|
|
|
self::strlen($salt) OR $salt = str_repeat("\0", $this->digests[ $digest ]); |
|
430
|
|
|
|
|
431
|
|
|
$prk = hash_hmac($digest, $key, $salt, true); |
|
432
|
|
|
$key = ''; |
|
433
|
|
|
for ($key_block = '', $block_index = 1; self::strlen($key) < $length; $block_index++) { |
|
434
|
|
|
$key_block = hash_hmac($digest, $key_block . $info . chr($block_index), $prk, true); |
|
435
|
|
|
$key .= $key_block; |
|
436
|
|
|
} |
|
437
|
|
|
|
|
438
|
|
|
return self::substr($key, 0, $length); |
|
439
|
|
|
} |
|
440
|
|
|
|
|
441
|
|
|
// -------------------------------------------------------------------- |
|
442
|
|
|
|
|
443
|
|
|
/** |
|
444
|
|
|
* Byte-safe substr() |
|
445
|
|
|
* |
|
446
|
|
|
* @param string $str |
|
447
|
|
|
* @param int $start |
|
448
|
|
|
* @param int $length |
|
449
|
|
|
* |
|
450
|
|
|
* @return string |
|
451
|
|
|
*/ |
|
452
|
|
|
protected static function substr($str, $start, $length = null) |
|
453
|
|
|
{ |
|
454
|
|
|
if (self::$isFunctionOverride) { |
|
455
|
|
|
// mb_substr($str, $start, null, '8bit') returns an empty |
|
456
|
|
|
// string on PHP 5.3 |
|
457
|
|
|
isset($length) OR $length = ($start >= 0 |
|
458
|
|
|
? self::strlen($str) - $start |
|
459
|
|
|
: -$start); |
|
460
|
|
|
|
|
461
|
|
|
return mb_substr($str, $start, $length, '8bit'); |
|
462
|
|
|
} |
|
463
|
|
|
|
|
464
|
|
|
return isset($length) |
|
465
|
|
|
? substr($str, $start, $length) |
|
466
|
|
|
: substr($str, $start); |
|
467
|
|
|
} |
|
468
|
|
|
|
|
469
|
|
|
// -------------------------------------------------------------------- |
|
470
|
|
|
|
|
471
|
|
|
/** |
|
472
|
|
|
* Decrypt |
|
473
|
|
|
* |
|
474
|
|
|
* @param string $data Encrypted data |
|
475
|
|
|
* @param array $params Input parameters |
|
476
|
|
|
* |
|
477
|
|
|
* @return string |
|
478
|
|
|
*/ |
|
479
|
|
|
public function decrypt($data, array $params = null) |
|
480
|
|
|
{ |
|
481
|
|
|
if (($params = $this->getParams($params)) === false) { |
|
|
|
|
|
|
482
|
|
|
return false; |
|
483
|
|
|
} |
|
484
|
|
|
|
|
485
|
|
|
if (isset($params[ 'hmac_digest' ])) { |
|
486
|
|
|
// This might look illogical, but it is done during encryption as well ... |
|
487
|
|
|
// The 'base64' value is effectively an inverted "raw data" parameter |
|
488
|
|
|
$digest_size = ($params[ 'base64' ]) |
|
489
|
|
|
? $this->digests[ $params[ 'hmac_digest' ] ] * 2 |
|
490
|
|
|
: $this->digests[ $params[ 'hmac_digest' ] ]; |
|
491
|
|
|
|
|
492
|
|
|
if (self::strlen($data) <= $digest_size) { |
|
493
|
|
|
return false; |
|
|
|
|
|
|
494
|
|
|
} |
|
495
|
|
|
|
|
496
|
|
|
$hmac_input = self::substr($data, 0, $digest_size); |
|
497
|
|
|
$data = self::substr($data, $digest_size); |
|
498
|
|
|
|
|
499
|
|
|
isset($params[ 'hmac_key' ]) OR |
|
500
|
|
|
$params[ 'hmac_key' ] = $this->hkdf($this->key, 'sha512', null, null, 'authentication'); |
|
501
|
|
|
$hmac_check = hash_hmac($params[ 'hmac_digest' ], $data, $params[ 'hmac_key' ], ! $params[ 'base64' ]); |
|
502
|
|
|
|
|
503
|
|
|
// Time-attack-safe comparison |
|
504
|
|
|
$diff = 0; |
|
505
|
|
|
for ($i = 0; $i < $digest_size; $i++) { |
|
506
|
|
|
$diff |= ord($hmac_input[ $i ]) ^ ord($hmac_check[ $i ]); |
|
507
|
|
|
} |
|
508
|
|
|
|
|
509
|
|
|
if ($diff !== 0) { |
|
510
|
|
|
return false; |
|
|
|
|
|
|
511
|
|
|
} |
|
512
|
|
|
} |
|
513
|
|
|
|
|
514
|
|
|
if ($params[ 'base64' ]) { |
|
515
|
|
|
$data = base64_decode($data); |
|
516
|
|
|
} |
|
517
|
|
|
|
|
518
|
|
|
isset($params[ 'key' ]) OR |
|
519
|
|
|
$params[ 'key' ] = $this->hkdf($this->key, 'sha512', null, self::strlen($this->key), 'encryption'); |
|
520
|
|
|
|
|
521
|
|
|
return $this->{$this->driver . 'Decrypt'}($data, $params); |
|
522
|
|
|
} |
|
523
|
|
|
|
|
524
|
|
|
// -------------------------------------------------------------------- |
|
525
|
|
|
|
|
526
|
|
|
/** |
|
527
|
|
|
* __get() magic |
|
528
|
|
|
* |
|
529
|
|
|
* @param string $key Property name |
|
530
|
|
|
* |
|
531
|
|
|
* @return mixed |
|
532
|
|
|
*/ |
|
533
|
|
|
public function __get($key) |
|
534
|
|
|
{ |
|
535
|
|
|
// Because aliases |
|
536
|
|
|
if ($key === 'mode') { |
|
537
|
|
|
return array_search($this->mode, $this->modes[ $this->driver ], true); |
|
538
|
|
|
} elseif (in_array($key, ['cipher', 'driver', 'drivers', 'digests'], true)) { |
|
539
|
|
|
return $this->{'_' . $key}; |
|
540
|
|
|
} |
|
541
|
|
|
|
|
542
|
|
|
return null; |
|
543
|
|
|
} |
|
544
|
|
|
|
|
545
|
|
|
// -------------------------------------------------------------------- |
|
546
|
|
|
|
|
547
|
|
|
/** |
|
548
|
|
|
* Initialize MCrypt |
|
549
|
|
|
* |
|
550
|
|
|
* @param array $params Configuration parameters |
|
551
|
|
|
* |
|
552
|
|
|
* @throws \O2System\Spl\Exceptions\Logic\BadFunctionCallException |
|
553
|
|
|
*/ |
|
554
|
|
|
protected function mcryptInitialize($params) |
|
555
|
|
|
{ |
|
556
|
|
|
if ( ! empty($params[ 'cipher' ])) { |
|
557
|
|
|
$params[ 'cipher' ] = strtolower($params[ 'cipher' ]); |
|
558
|
|
|
$this->cipherAlias($params[ 'cipher' ]); |
|
559
|
|
|
|
|
560
|
|
|
if ( ! in_array($params[ 'cipher' ], mcrypt_list_algorithms(), true)) { |
|
|
|
|
|
|
561
|
|
|
// 'Encryption: MCrypt cipher ' . strtoupper( $params[ 'cipher' ] ) . ' is not available.' |
|
562
|
|
|
throw new BadFunctionCallException( |
|
563
|
|
|
'E_SECURITY_MCRYPT_CIPHER_UNAVAILABLE', |
|
564
|
|
|
0, |
|
565
|
|
|
[strtoupper($params[ 'cipher' ])] |
|
566
|
|
|
); |
|
567
|
|
|
} else { |
|
568
|
|
|
$this->cipher = $params[ 'cipher' ]; |
|
569
|
|
|
} |
|
570
|
|
|
} |
|
571
|
|
|
|
|
572
|
|
|
if ( ! empty($params[ 'mode' ])) { |
|
573
|
|
|
$params[ 'mode' ] = strtolower($params[ 'mode' ]); |
|
574
|
|
|
if ( ! isset($this->modes[ 'mcrypt' ][ $params[ 'mode' ] ])) { |
|
575
|
|
|
// 'Encryption: MCrypt mode ' . strtoupper( $params[ 'mode' ] ) . ' is not available.' |
|
576
|
|
|
throw new BadFunctionCallException( |
|
577
|
|
|
'E_SECURITY_MCRYPT_MODE_UNAVAILABLE', |
|
578
|
|
|
0, |
|
579
|
|
|
[strtoupper($params[ 'mode' ])] |
|
580
|
|
|
); |
|
581
|
|
|
} else { |
|
582
|
|
|
$this->mode = $this->modes[ 'mcrypt' ][ $params[ 'mode' ] ]; |
|
583
|
|
|
} |
|
584
|
|
|
} |
|
585
|
|
|
|
|
586
|
|
|
if (isset($this->cipher, $this->mode)) { |
|
587
|
|
|
if (is_resource($this->handle) |
|
588
|
|
|
&& (strtolower(mcrypt_enc_get_algorithms_name($this->handle)) !== $this->cipher |
|
|
|
|
|
|
589
|
|
|
OR strtolower(mcrypt_enc_get_modes_name($this->handle)) !== $this->mode) |
|
|
|
|
|
|
590
|
|
|
) { |
|
591
|
|
|
mcrypt_module_close($this->handle); |
|
|
|
|
|
|
592
|
|
|
} |
|
593
|
|
|
|
|
594
|
|
|
if ($this->handle = mcrypt_module_open($this->cipher, '', $this->mode, '')) { |
|
|
|
|
|
|
595
|
|
|
logger( |
|
596
|
|
|
'info', |
|
597
|
|
|
'LOG_SECURITY_MCRYPT_CIPHER_INITIALIZED', |
|
598
|
|
|
[strtoupper($this->cipher), strtoupper($this->mode)] |
|
599
|
|
|
); |
|
600
|
|
|
} else { |
|
601
|
|
|
throw new BadFunctionCallException( |
|
602
|
|
|
'E_SECURITY_MCRYPT_UNABLE_TO_INITIALIZED', |
|
603
|
|
|
0, |
|
604
|
|
|
[strtoupper($this->cipher), strtoupper($this->mode)] |
|
605
|
|
|
); |
|
606
|
|
|
} |
|
607
|
|
|
} |
|
608
|
|
|
} |
|
609
|
|
|
|
|
610
|
|
|
// -------------------------------------------------------------------- |
|
611
|
|
|
|
|
612
|
|
|
/** |
|
613
|
|
|
* Initialize OpenSSL |
|
614
|
|
|
* |
|
615
|
|
|
* @param array $params Configuration parameters |
|
616
|
|
|
* |
|
617
|
|
|
* @throws \O2System\Spl\Exceptions\Logic\BadFunctionCallException |
|
618
|
|
|
*/ |
|
619
|
|
|
protected function opensslInitialize($params) |
|
620
|
|
|
{ |
|
621
|
|
|
if ( ! empty($params[ 'cipher' ])) { |
|
622
|
|
|
$params[ 'cipher' ] = strtolower($params[ 'cipher' ]); |
|
623
|
|
|
$this->cipherAlias($params[ 'cipher' ]); |
|
624
|
|
|
$this->cipher = $params[ 'cipher' ]; |
|
625
|
|
|
} |
|
626
|
|
|
|
|
627
|
|
|
if ( ! empty($params[ 'mode' ])) { |
|
628
|
|
|
$params[ 'mode' ] = strtolower($params[ 'mode' ]); |
|
629
|
|
|
if ( ! isset($this->modes[ 'openssl' ][ $params[ 'mode' ] ])) { |
|
630
|
|
|
// 'Encryption: OpenSSL mode ' . strtoupper( $params[ 'mode' ] ) . ' is not available.' |
|
631
|
|
|
throw new BadFunctionCallException( |
|
632
|
|
|
'E_SECURITY_CRYPT_OPENSSL_MODE_UNAVAILABLE', |
|
633
|
|
|
0, |
|
634
|
|
|
[strtoupper($params[ 'mode' ])] |
|
635
|
|
|
); |
|
636
|
|
|
} else { |
|
637
|
|
|
$this->mode = $this->modes[ 'openssl' ][ $params[ 'mode' ] ]; |
|
638
|
|
|
} |
|
639
|
|
|
} |
|
640
|
|
|
|
|
641
|
|
|
if (isset($this->cipher, $this->mode)) { |
|
642
|
|
|
// This is mostly for the stream mode, which doesn't get suffixed in OpenSSL |
|
643
|
|
|
$handle = empty($this->mode) |
|
644
|
|
|
? $this->cipher |
|
645
|
|
|
: $this->cipher . '-' . $this->mode; |
|
646
|
|
|
|
|
647
|
|
|
if ( ! in_array($handle, openssl_get_cipher_methods(), true)) { |
|
648
|
|
|
$this->handle = null; |
|
649
|
|
|
// 'Encryption: Unable to initialize OpenSSL with method ' . strtoupper( $handle ) . '.' |
|
650
|
|
|
throw new BadFunctionCallException( |
|
651
|
|
|
'E_SECURITY_CRYPT_OPENSSL_UNABLE_TO_INITIALIZED', |
|
652
|
|
|
0, |
|
653
|
|
|
[strtoupper($handle)] |
|
654
|
|
|
); |
|
655
|
|
|
} else { |
|
656
|
|
|
$this->handle = $handle; |
|
657
|
|
|
// 'Encryption: OpenSSL initialized with method ' . strtoupper( $handle ) . '.' |
|
658
|
|
|
logger( |
|
659
|
|
|
'info', |
|
660
|
|
|
'LOG_SECURITY_CRYPT_OPENSSL_INITIALIZED', |
|
661
|
|
|
[strtoupper($handle)] |
|
662
|
|
|
); |
|
663
|
|
|
} |
|
664
|
|
|
} |
|
665
|
|
|
} |
|
666
|
|
|
|
|
667
|
|
|
// -------------------------------------------------------------------- |
|
668
|
|
|
|
|
669
|
|
|
/** |
|
670
|
|
|
* Encrypt via MCrypt |
|
671
|
|
|
* |
|
672
|
|
|
* @param string $data Input data |
|
673
|
|
|
* @param array $params Input parameters |
|
674
|
|
|
* |
|
675
|
|
|
* @return string |
|
676
|
|
|
*/ |
|
677
|
|
|
protected function mcryptEncrypt($data, $params) |
|
678
|
|
|
{ |
|
679
|
|
|
if ( ! is_resource($params[ 'handle' ])) { |
|
680
|
|
|
return false; |
|
|
|
|
|
|
681
|
|
|
} |
|
682
|
|
|
|
|
683
|
|
|
// The greater-than-1 comparison is mostly a work-around for a bug, |
|
684
|
|
|
// where 1 is returned for ARCFour instead of 0. |
|
685
|
|
|
$iv = (($iv_size = mcrypt_enc_get_iv_size($params[ 'handle' ])) > 1) |
|
|
|
|
|
|
686
|
|
|
? $this->createKey($iv_size) |
|
687
|
|
|
: null; |
|
688
|
|
|
|
|
689
|
|
|
if (mcrypt_generic_init($params[ 'handle' ], $params[ 'key' ], $iv) < 0) { |
|
|
|
|
|
|
690
|
|
|
if ($params[ 'handle' ] !== $this->handle) { |
|
691
|
|
|
mcrypt_module_close($params[ 'handle' ]); |
|
|
|
|
|
|
692
|
|
|
} |
|
693
|
|
|
|
|
694
|
|
|
return false; |
|
|
|
|
|
|
695
|
|
|
} |
|
696
|
|
|
|
|
697
|
|
|
// Use PKCS#7 padding in order to ensure compatibility with OpenSSL |
|
698
|
|
|
// and other implementations outside of PHP. |
|
699
|
|
|
if (in_array(strtolower(mcrypt_enc_get_modes_name($params[ 'handle' ])), ['cbc', 'ecb'], true)) { |
|
|
|
|
|
|
700
|
|
|
$block_size = mcrypt_enc_get_block_size($params[ 'handle' ]); |
|
|
|
|
|
|
701
|
|
|
$pad = $block_size - (self::strlen($data) % $block_size); |
|
702
|
|
|
$data .= str_repeat(chr($pad), $pad); |
|
703
|
|
|
} |
|
704
|
|
|
|
|
705
|
|
|
// Work-around for yet another strange behavior in MCrypt. |
|
706
|
|
|
// |
|
707
|
|
|
// When encrypting in ECB mode, the IV is ignored. Yet |
|
708
|
|
|
// mcrypt_enc_get_iv_size() returns a value larger than 0 |
|
709
|
|
|
// even if ECB is used AND mcrypt_generic_init() complains |
|
710
|
|
|
// if you don't pass an IV with length equal to the said |
|
711
|
|
|
// return value. |
|
712
|
|
|
// |
|
713
|
|
|
// This probably would've been fine (even though still wasteful), |
|
714
|
|
|
// but OpenSSL isn't that dumb and we need to make the process |
|
715
|
|
|
// portable, so ... |
|
716
|
|
|
$data = (mcrypt_enc_get_modes_name($params[ 'handle' ]) !== 'ECB') |
|
|
|
|
|
|
717
|
|
|
? $iv . mcrypt_generic($params[ 'handle' ], $data) |
|
|
|
|
|
|
718
|
|
|
: mcrypt_generic($params[ 'handle' ], $data); |
|
|
|
|
|
|
719
|
|
|
|
|
720
|
|
|
mcrypt_generic_deinit($params[ 'handle' ]); |
|
|
|
|
|
|
721
|
|
|
if ($params[ 'handle' ] !== $this->handle) { |
|
722
|
|
|
mcrypt_module_close($params[ 'handle' ]); |
|
|
|
|
|
|
723
|
|
|
} |
|
724
|
|
|
|
|
725
|
|
|
return $data; |
|
726
|
|
|
} |
|
727
|
|
|
|
|
728
|
|
|
// -------------------------------------------------------------------- |
|
729
|
|
|
|
|
730
|
|
|
/** |
|
731
|
|
|
* Create a random key |
|
732
|
|
|
* |
|
733
|
|
|
* @param int $length Browser length |
|
734
|
|
|
* |
|
735
|
|
|
* @return string |
|
736
|
|
|
*/ |
|
737
|
|
|
public function createKey($length) |
|
738
|
|
|
{ |
|
739
|
|
|
if (function_exists('random_bytes')) { |
|
740
|
|
|
try { |
|
741
|
|
|
return random_bytes((int)$length); |
|
742
|
|
|
} catch (\Exception $e) { |
|
743
|
|
|
logger('error', $e->getMessage()); |
|
744
|
|
|
|
|
745
|
|
|
return false; |
|
|
|
|
|
|
746
|
|
|
} |
|
747
|
|
|
} elseif (defined('MCRYPT_DEV_URANDOM')) { |
|
748
|
|
|
return mcrypt_create_iv($length, MCRYPT_DEV_URANDOM); |
|
|
|
|
|
|
749
|
|
|
} |
|
750
|
|
|
|
|
751
|
|
|
$is_secure = null; |
|
752
|
|
|
$key = openssl_random_pseudo_bytes($length, $is_secure); |
|
753
|
|
|
|
|
754
|
|
|
return ($is_secure === true) |
|
|
|
|
|
|
755
|
|
|
? $key |
|
756
|
|
|
: false; |
|
757
|
|
|
} |
|
758
|
|
|
|
|
759
|
|
|
// -------------------------------------------------------------------- |
|
760
|
|
|
|
|
761
|
|
|
/** |
|
762
|
|
|
* Encrypt via OpenSSL |
|
763
|
|
|
* |
|
764
|
|
|
* @param string $data Input data |
|
765
|
|
|
* @param array $params Input parameters |
|
766
|
|
|
* |
|
767
|
|
|
* @return string |
|
768
|
|
|
*/ |
|
769
|
|
|
protected function opensslEncrypt($data, $params) |
|
770
|
|
|
{ |
|
771
|
|
|
if (empty($params[ 'handle' ])) { |
|
772
|
|
|
return false; |
|
|
|
|
|
|
773
|
|
|
} |
|
774
|
|
|
|
|
775
|
|
|
$iv = ($iv_size = openssl_cipher_iv_length($params[ 'handle' ])) |
|
776
|
|
|
? $this->createKey($iv_size) |
|
777
|
|
|
: null; |
|
778
|
|
|
|
|
779
|
|
|
$data = openssl_encrypt( |
|
780
|
|
|
$data, |
|
781
|
|
|
$params[ 'handle' ], |
|
782
|
|
|
$params[ 'key' ], |
|
783
|
|
|
1, // DO NOT TOUCH! |
|
784
|
|
|
$iv |
|
785
|
|
|
); |
|
786
|
|
|
|
|
787
|
|
|
if ($data === false) { |
|
788
|
|
|
return false; |
|
|
|
|
|
|
789
|
|
|
} |
|
790
|
|
|
|
|
791
|
|
|
return $iv . $data; |
|
792
|
|
|
} |
|
793
|
|
|
|
|
794
|
|
|
// -------------------------------------------------------------------- |
|
795
|
|
|
|
|
796
|
|
|
/** |
|
797
|
|
|
* Decrypt via MCrypt |
|
798
|
|
|
* |
|
799
|
|
|
* @param string $data Encrypted data |
|
800
|
|
|
* @param array $params Input parameters |
|
801
|
|
|
* |
|
802
|
|
|
* @return string |
|
803
|
|
|
*/ |
|
804
|
|
|
protected function mcryptDecrypt($data, $params) |
|
805
|
|
|
{ |
|
806
|
|
|
if ( ! is_resource($params[ 'handle' ])) { |
|
807
|
|
|
return false; |
|
|
|
|
|
|
808
|
|
|
} |
|
809
|
|
|
|
|
810
|
|
|
// The greater-than-1 comparison is mostly a work-around for a bug, |
|
811
|
|
|
// where 1 is returned for ARCFour instead of 0. |
|
812
|
|
|
if (($iv_size = mcrypt_enc_get_iv_size($params[ 'handle' ])) > 1) { |
|
|
|
|
|
|
813
|
|
|
if (mcrypt_enc_get_modes_name($params[ 'handle' ]) !== 'ECB') { |
|
|
|
|
|
|
814
|
|
|
$iv = self::substr($data, 0, $iv_size); |
|
815
|
|
|
$data = self::substr($data, $iv_size); |
|
816
|
|
|
} else { |
|
817
|
|
|
// MCrypt is dumb and this is ignored, only size matters |
|
818
|
|
|
$iv = str_repeat("\x0", $iv_size); |
|
819
|
|
|
} |
|
820
|
|
|
} else { |
|
821
|
|
|
$iv = null; |
|
822
|
|
|
} |
|
823
|
|
|
|
|
824
|
|
|
if (mcrypt_generic_init($params[ 'handle' ], $params[ 'key' ], $iv) < 0) { |
|
|
|
|
|
|
825
|
|
|
if ($params[ 'handle' ] !== $this->handle) { |
|
826
|
|
|
mcrypt_module_close($params[ 'handle' ]); |
|
|
|
|
|
|
827
|
|
|
} |
|
828
|
|
|
|
|
829
|
|
|
return false; |
|
|
|
|
|
|
830
|
|
|
} |
|
831
|
|
|
|
|
832
|
|
|
$data = mdecrypt_generic($params[ 'handle' ], $data); |
|
|
|
|
|
|
833
|
|
|
// Remove PKCS#7 padding, if necessary |
|
834
|
|
|
if (in_array(strtolower(mcrypt_enc_get_modes_name($params[ 'handle' ])), ['cbc', 'ecb'], true)) { |
|
|
|
|
|
|
835
|
|
|
$data = self::substr($data, 0, -ord($data[ self::strlen($data) - 1 ])); |
|
836
|
|
|
} |
|
837
|
|
|
|
|
838
|
|
|
mcrypt_generic_deinit($params[ 'handle' ]); |
|
|
|
|
|
|
839
|
|
|
if ($params[ 'handle' ] !== $this->handle) { |
|
840
|
|
|
mcrypt_module_close($params[ 'handle' ]); |
|
|
|
|
|
|
841
|
|
|
} |
|
842
|
|
|
|
|
843
|
|
|
return $data; |
|
844
|
|
|
} |
|
845
|
|
|
|
|
846
|
|
|
// -------------------------------------------------------------------- |
|
847
|
|
|
|
|
848
|
|
|
/** |
|
849
|
|
|
* Decrypt via OpenSSL |
|
850
|
|
|
* |
|
851
|
|
|
* @param string $data Encrypted data |
|
852
|
|
|
* @param array $params Input parameters |
|
853
|
|
|
* |
|
854
|
|
|
* @return string |
|
855
|
|
|
*/ |
|
856
|
|
|
protected function opensslDecrypt($data, $params) |
|
857
|
|
|
{ |
|
858
|
|
|
if ($iv_size = openssl_cipher_iv_length($params[ 'handle' ])) { |
|
859
|
|
|
$iv = self::substr($data, 0, $iv_size); |
|
860
|
|
|
$data = self::substr($data, $iv_size); |
|
861
|
|
|
} else { |
|
862
|
|
|
$iv = null; |
|
863
|
|
|
} |
|
864
|
|
|
|
|
865
|
|
|
return empty($params[ 'handle' ]) |
|
|
|
|
|
|
866
|
|
|
? false |
|
867
|
|
|
: openssl_decrypt( |
|
868
|
|
|
$data, |
|
869
|
|
|
$params[ 'handle' ], |
|
870
|
|
|
$params[ 'key' ], |
|
871
|
|
|
1, // DO NOT TOUCH! |
|
872
|
|
|
$iv |
|
873
|
|
|
); |
|
874
|
|
|
} |
|
875
|
|
|
|
|
876
|
|
|
// -------------------------------------------------------------------- |
|
877
|
|
|
|
|
878
|
|
|
/** |
|
879
|
|
|
* Get MCrypt handle |
|
880
|
|
|
* |
|
881
|
|
|
* @param string $cipher Cipher name |
|
882
|
|
|
* @param string $mode Encryption mode |
|
883
|
|
|
* |
|
884
|
|
|
* @return resource |
|
885
|
|
|
*/ |
|
886
|
|
|
protected function mcryptGetHandle($cipher, $mode) |
|
887
|
|
|
{ |
|
888
|
|
|
return mcrypt_module_open($cipher, '', $mode, ''); |
|
|
|
|
|
|
889
|
|
|
} |
|
890
|
|
|
|
|
891
|
|
|
// -------------------------------------------------------------------- |
|
892
|
|
|
|
|
893
|
|
|
/** |
|
894
|
|
|
* Get OpenSSL handle |
|
895
|
|
|
* |
|
896
|
|
|
* @param string $cipher Cipher name |
|
897
|
|
|
* @param string $mode Encryption mode |
|
898
|
|
|
* |
|
899
|
|
|
* @return string |
|
900
|
|
|
*/ |
|
901
|
|
|
protected function opensslGetHandle($cipher, $mode) |
|
902
|
|
|
{ |
|
903
|
|
|
// OpenSSL methods aren't suffixed with '-stream' for this mode |
|
904
|
|
|
return ($mode === 'stream') |
|
905
|
|
|
? $cipher |
|
906
|
|
|
: $cipher . '-' . $mode; |
|
907
|
|
|
} |
|
908
|
|
|
} |
o2system /
security
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