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[WIP] Adding encryption decorator (#107)
* Adding encrypted decorator for psr6 * fixed testItemModifiersReturnsStatic * rename classes | added cs fixes | remove old readme lines * Rename folder | fix phpdoc in EncryptedItemDecorator * fix last test * added cs fixes * update php header * added a Changelog * fix format
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‎.github/PULL_REQUEST_TEMPLATE.md‎

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This is a READ ONLY repository.
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Please make your pull request to https://github.com/php-cache/cache
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Thank you for contributing.

‎.gitignore‎

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composer.lock
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vendor

‎.travis.yml‎

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language: php
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sudo: false
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matrix:
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include:
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- php: 7.0
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cache:
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directories:
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- "$HOME/.composer/cache"
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install:
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- composer update
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script:
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- ./vendor/bin/phpunit --coverage-clover=coverage.xml
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after_success:
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- pip install --user codecov && codecov
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notifications:
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email: false

‎Changelog.md‎

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# Change Log
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The change log describes what is "Added", "Removed", "Changed" or "Fixed" between each release.
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## UNRELEASED
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‎EncryptedCachePool.php‎

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<?php
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/*
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* This file is part of php-cache organization.
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*
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* (c) 2015-2016 Aaron Scherer <[email protected]>, Tobias Nyholm <[email protected]>
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*
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* This source file is subject to the MIT license that is bundled
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* with this source code in the file LICENSE.
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*/
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namespace Cache\Encryption;
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use Defuse\Crypto\Key;
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use Psr\Cache\CacheItemInterface;
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use Psr\Cache\CacheItemPoolInterface;
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/**
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* Wrapps a CacheItemInterface with EncryptedItemDecorator.
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*
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* @author Daniel Bannert <[email protected]>
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*/
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class EncryptedCachePool implements CacheItemPoolInterface
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{
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/**
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* @type CacheItemPoolInterface
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*/
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private $cachePool;
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/**
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* @type Key
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*/
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private $key;
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/**
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* @param CacheItemPoolInterface $cachePool
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* @param Key $key
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*/
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public function __construct(CacheItemPoolInterface $cachePool, Key $key)
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{
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$this->cachePool = $cachePool;
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$this->key = $key;
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}
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/**
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* {@inheritdoc}
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*/
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public function getItem($key)
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{
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$item = $this->cachePool->getItem($key);
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if (!($item instanceof EncryptedItemDecorator)) {
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return new EncryptedItemDecorator($item, $this->key);
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}
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return $item;
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}
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/**
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* {@inheritdoc}
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*/
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public function getItems(array $keys = [])
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{
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return array_map(function (CacheItemInterface $inner) {
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if (!($inner instanceof EncryptedItemDecorator)) {
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return new EncryptedItemDecorator($inner, $this->key);
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}
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return $inner;
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}, $this->cachePool->getItems($keys));
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}
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/**
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* {@inheritdoc}
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*/
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public function hasItem($key)
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{
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return $this->cachePool->hasItem($key);
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}
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/**
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* {@inheritdoc}
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*/
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public function clear()
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{
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return $this->cachePool->clear();
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}
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/**
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* {@inheritdoc}
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*/
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public function deleteItem($key)
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{
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return $this->cachePool->deleteItem($key);
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}
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/**
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* {@inheritdoc}
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*/
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public function deleteItems(array $keys)
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{
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return $this->cachePool->deleteItems($keys);
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}
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/**
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* {@inheritdoc}
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*/
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public function save(CacheItemInterface $item)
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{
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if (!($item instanceof EncryptedItemDecorator)) {
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$item = new EncryptedItemDecorator($item, $this->key);
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}
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return $this->cachePool->save($item);
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}
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/**
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* {@inheritdoc}
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*/
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public function saveDeferred(CacheItemInterface $item)
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{
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if (!($item instanceof EncryptedItemDecorator)) {
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$item = new EncryptedItemDecorator($item, $this->key);
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}
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return $this->cachePool->saveDeferred($item);
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}
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/**
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* {@inheritdoc}
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*/
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public function commit()
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{
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return $this->cachePool->commit();
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}
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}

‎EncryptedItemDecorator.php‎

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<?php
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/*
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* This file is part of php-cache organization.
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*
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* (c) 2015-2016 Aaron Scherer <[email protected]>, Tobias Nyholm <[email protected]>
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*
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* This source file is subject to the MIT license that is bundled
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* with this source code in the file LICENSE.
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*/
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namespace Cache\Encryption;
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use Cache\Adapter\Common\HasExpirationDateInterface;
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use Cache\Taggable\TaggableItemInterface;
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use Defuse\Crypto\Crypto;
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use Defuse\Crypto\Key;
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use Psr\Cache\CacheItemInterface;
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/**
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* Encrypt and Decrypt all the stored items.
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*
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* @author Daniel Bannert <[email protected]>
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*/
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class EncryptedItemDecorator implements CacheItemInterface, HasExpirationDateInterface, TaggableItemInterface
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{
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/**
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* @type CacheItemInterface
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*/
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private $cacheItem;
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/**
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* @type Key
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*/
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private $key;
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/**
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* @param CacheItemInterface $cacheItem
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* @param Key $key
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*/
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public function __construct(CacheItemInterface $cacheItem, Key $key)
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{
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$this->cacheItem = $cacheItem;
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$this->key = $key;
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}
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/**
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* {@inheritdoc}
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*/
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public function getKey()
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{
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return $this->cacheItem->getKey();
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}
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/**
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* {@inheritdoc}
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*/
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public function set($value)
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{
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$type = gettype($value);
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if ($type === 'object') {
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$value = serialize($value);
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}
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$json = json_encode(['type' => $type, 'value' => $value]);
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$this->cacheItem->set(Crypto::encrypt($json, $this->key));
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function get()
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{
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if (!$this->isHit()) {
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return;
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}
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$item = json_decode(Crypto::decrypt($this->cacheItem->get(), $this->key), true);
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return $this->transform($item);
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}
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/**
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* {@inheritdoc}
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*/
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public function isHit()
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{
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return $this->cacheItem->isHit();
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}
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/**
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* {@inheritdoc}
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*/
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public function getExpirationDate()
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{
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return $this->cacheItem->getExpirationDate();
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}
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/**
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* {@inheritdoc}
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*/
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public function expiresAt($expiration)
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{
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$this->cacheItem->expiresAt($expiration);
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function expiresAfter($time)
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{
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$this->cacheItem->expiresAfter($time);
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function getTags()
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{
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return $this->cacheItem->getTags();
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}
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/**
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* {@inheritdoc}
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*/
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public function addTag($tag)
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{
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$this->cacheItem->addTag($tag);
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function setTags(array $tags)
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{
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$this->cacheItem->setTags($tags);
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return $this;
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}
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/**
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* Creating a copy of the orginal CacheItemInterface object.
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*/
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public function __clone()
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{
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$this->cacheItem = clone $this->cacheItem;
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}
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/**
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* Transfrom value back to it orginal type.
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*
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* @param array $item
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*
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* @return mixed
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*/
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private function transform(array $item)
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{
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if ($item['type'] === 'object') {
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return unserialize($item['value']);
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}
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$value = $item['value'];
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settype($value, $item['type']);
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return $value;
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}
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}

‎LICENSE‎

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The MIT License (MIT)
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Copyright (c) 2015 - 2016 Aaron Scherer
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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