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Filename : KeyPairGenerator.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\Generator;

use PleskLetsEncrypt\AcmePhp\Ssl\Exception\KeyGenerationException;
use PleskLetsEncrypt\AcmePhp\Ssl\Exception\KeyPairGenerationException;
use PleskLetsEncrypt\AcmePhp\Ssl\Generator\DhKey\DhKeyGenerator;
use PleskLetsEncrypt\AcmePhp\Ssl\Generator\DsaKey\DsaKeyGenerator;
use PleskLetsEncrypt\AcmePhp\Ssl\Generator\EcKey\EcKeyGenerator;
use PleskLetsEncrypt\AcmePhp\Ssl\Generator\RsaKey\RsaKeyGenerator;
use PleskLetsEncrypt\AcmePhp\Ssl\Generator\RsaKey\RsaKeyOption;
use PleskLetsEncrypt\AcmePhp\Ssl\KeyPair;
/**
 * Generate random KeyPair using OpenSSL.
 *
 * @author Jérémy Derussé <jeremy@derusse.com>
 */
class KeyPairGenerator
{
    private $generator;
    public function __construct(PrivateKeyGeneratorInterface $generator = null)
    {
        $this->generator = $generator ?: new ChainPrivateKeyGenerator([new RsaKeyGenerator(), new EcKeyGenerator(), new DhKeyGenerator(), new DsaKeyGenerator()]);
    }
    /**
     * @param KeyOption|null $keyOption configuration of the key to generate
     *
     * @throws KeyPairGenerationException when OpenSSL failed to generate keys
     */
    public function generateKeyPair(KeyOption $keyOption = null) : KeyPair
    {
        if (null === $keyOption) {
            $keyOption = new RsaKeyOption();
        }
        try {
            $privateKey = $this->generator->generatePrivateKey($keyOption);
        } catch (KeyGenerationException $e) {
            throw new KeyPairGenerationException('Fail to generate a KeyPair with the given options', 0, $e);
        }
        return new KeyPair($privateKey->getPublicKey(), $privateKey);
    }
}