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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 PleskSslIt\AcmePhp\Ssl\Generator;

use PleskSslIt\AcmePhp\Ssl\Exception\KeyGenerationException;
use PleskSslIt\AcmePhp\Ssl\Exception\KeyPairGenerationException;
use PleskSslIt\AcmePhp\Ssl\Generator\DhKey\DhKeyGenerator;
use PleskSslIt\AcmePhp\Ssl\Generator\DsaKey\DsaKeyGenerator;
use PleskSslIt\AcmePhp\Ssl\Generator\EcKey\EcKeyGenerator;
use PleskSslIt\AcmePhp\Ssl\Generator\RsaKey\RsaKeyGenerator;
use PleskSslIt\AcmePhp\Ssl\Generator\RsaKey\RsaKeyOption;
use PleskSslIt\AcmePhp\Ssl\KeyPair;
use PleskSslIt\Webmozart\Assert\Assert;
/**
 * 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()]);
    }
    /**
     * Generate KeyPair.
     *
     * @param KeyOption $keyOption configuration of the key to generate
     *
     * @throws KeyPairGenerationException when OpenSSL failed to generate keys
     *
     * @return KeyPair
     */
    public function generateKeyPair($keyOption = null)
    {
        if (null === $keyOption) {
            $keyOption = new RsaKeyOption();
        }
        if (\is_int($keyOption)) {
            @\trigger_error('Passing a keySize to "generateKeyPair" is deprecated since version 1.1 and will be removed in 2.0. Pass an instance of KeyOption instead', \E_USER_DEPRECATED);
            $keyOption = new RsaKeyOption($keyOption);
        }
        Assert::isInstanceOf($keyOption, KeyOption::class);
        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);
    }
}