Jsq\CacheEncryption\Password\ItemDecorator

Complexity

Total Complexity

8

Size/Duplication

Total Lines	60
Duplicated Lines	18.33 %

Coupling/Cohesion

Components	1
Dependencies	3

Test Coverage

Coverage

100%

Importance

Changes	3
Bugs	0	Features	1

6 Methods

Rating	Name	Duplication	Size	Complexity
A	isDecryptable()	0	10	2
A	authenticate()	0	4	1
A	__construct()	0	8	1
A	hmac()	0	4	1
A	encrypt()	0	12	1
A	decrypt()	11	11	2

<?php
namespace Jsq\CacheEncryption\Password;

use Jsq\CacheEncryption\ItemDecorator as BaseItemDecorator;
use Psr\Cache\CacheItemInterface;

class ItemDecorator extends BaseItemDecorator
{
    /** @var string */
    private $password;

    public function __construct(
        CacheItemInterface $decorated,
        $password,
        $cipher
    ) {
        parent::__construct($cipher, $decorated);
        $this->password = $password;
    }

    protected function isDecryptable()
    {
        $data = $this->getDecorated()->get();

        return $data instanceof EncryptedValue
            && $data->getMac() === $this->authenticate(
                $this->getKey(),
                $data->getCipherText()
            );
    }

    protected function encrypt($data)
    {
        $iv = $this->generateIv();
        $encrypted = $this->encryptString(serialize($data), $this->password, $iv);

        return new EncryptedValue(
            $encrypted,
            $this->getCipherMethod(),
            $iv,
            $this->authenticate($this->getKey(), $encrypted)
        );
    }

    protected function decrypt($data)

This method seems to be duplicated in your project.

    {
        if (!$data instanceof EncryptedValue) return null;

        return unserialize($this->decryptString(
            $data->getCipherText(),
            $data->getMethod(),
            $this->password,
            $data->getInitializationVector()
        ));
    }

    private function authenticate($key, $cipherText)
    {
        return $this->hmac($cipherText, $this->hmac($key, $this->password));
    }

    private function hmac($data, $key) 
    {
        return hash_hmac('sha256', $data, $key);
    }
}