Erkan IŞIK
149 lines
2.9 KiB
PHP
149 lines
2.9 KiB
PHP
<?php namespace ZN\Cryptography\Drivers;
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/**
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* ZN PHP Web Framework
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*
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* "Simplicity is the ultimate sophistication." ~ Da Vinci
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*
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* @package ZN
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* @license MIT [http://opensource.org/licenses/MIT]
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* @author Ozan UYKUN [ozan@znframework.com]
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*/
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use ZN\Base;
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use ZN\Support;
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use ZN\Datatype;
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use ZN\Cryptography\CryptoMapping;
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use ZN\Cryptography\Exception\InvalidCipherMethodException;
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class OpensslDriver extends CryptoMapping
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{
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/**
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* Magic constructor
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*
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* @param void
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*
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* @return void
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*
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* @codeCoverageIgnore
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*/
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public function __construct()
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{
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Support::func('openssl_open', 'OPENSSL');
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parent::__construct();
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}
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/**
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* It encrypts the data.
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*
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* @param string $data
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* @param string|array $settings
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*
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* @return string
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*/
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public function encrypt($data, $settings)
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{
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$this->stringParameter($settings);
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$set = $this->_settings($settings);
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$encode = trim(openssl_encrypt($data, $set->cipher, $set->key, 0, $set->iv));
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return base64_encode($encode);
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}
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/**
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* It decrypts the data.
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*
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* @param string $data
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* @param array $settings
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*
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* @return string
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*/
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public function decrypt($data, $settings)
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{
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$this->stringParameter($settings);
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$set = $this->_settings($settings);
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$data = base64_decode($data);
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return trim(openssl_decrypt(trim($data), $set->cipher, $set->key, 0, $set->iv));
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}
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/**
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* Generates a random password.
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*
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* @param int $length
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*
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* @return string
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*/
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public function keygen($length)
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{
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return openssl_random_pseudo_bytes($length);
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}
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/**
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* protected vector size
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*
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* @param string $cipher
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* @param string $key
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*
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* @return string
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*/
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protected function vectorSize($cipher, $key)
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{
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$iv = openssl_cipher_iv_length($cipher);
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return mb_substr(hash('sha1', $key), 0, $iv);
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}
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/**
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* protected settings
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*
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* @param array $settings
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*
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* @return object
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*/
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protected function _settings($settings)
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{
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$cipher = $settings['cipher'] ?? 'aes-128';
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$key = $settings['key'] ?? $this->key;
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$mode = $settings['mode'] ?? 'cbc';
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$cipher = strtolower(Base::suffix($cipher, '-' . $mode));
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if( ! in_array($cipher, openssl_get_cipher_methods()) )
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{
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throw new InvalidCipherMethodException(NULL, $cipher); // @codeCoverageIgnore
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}
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$iv = $settings['vector'] ?? $this->vectorSize($cipher, $key);
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return (object)
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[
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'key' => $key,
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'iv' => $iv,
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'cipher' => $cipher
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];
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}
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/**
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* protected string parameters
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*/
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protected function stringParameter(&$parameters)
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{
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if( is_string($parameters) )
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{
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$ex = explode('-', $parameters);
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$mode = $ex[count($ex) - 1] ?? '';
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array_pop($ex);
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$settings['mode'] = $mode;
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$settings['cipher'] = implode('-', $ex);
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$parameters = $settings;
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}
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}
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}
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