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Filename : Key.php

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<?php

/*
 * This file is part of the Acme PHP project.
 *
 * (c) Titouan Galopin <galopintitouan@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PleskLetsEncrypt\AcmePhp\Ssl;

use PleskLetsEncrypt\Webmozart\Assert\Assert;
/**
 * Represent a SSL key.
 *
 * @author Jérémy Derussé <jeremy@derusse.com>
 */
abstract class Key
{
    /** @var string */
    protected $keyPEM;
    public function __construct(string $keyPEM)
    {
        Assert::stringNotEmpty($keyPEM, __CLASS__ . '::$keyPEM should not be an empty string. Got %s');
        $this->keyPEM = $keyPEM;
    }
    public function getPEM() : string
    {
        return $this->keyPEM;
    }
    public function getDER() : string
    {
        $lines = \explode("\n", \trim($this->keyPEM));
        unset($lines[\count($lines) - 1]);
        unset($lines[0]);
        $result = \implode('', $lines);
        $result = \base64_decode($result);
        return $result;
    }
    /**
     * @return resource|\OpenSSLAsymmetricKey
     */
    public abstract function getResource();
}