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Filename : Certificate.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;

use PleskSslIt\AcmePhp\Ssl\Exception\CertificateFormatException;
use PleskSslIt\Webmozart\Assert\Assert;
/**
 * Represent a Certificate.
 *
 * @author Jérémy Derussé <jeremy@derusse.com>
 */
class Certificate
{
    /** @var string */
    private $certificatePEM;
    /** @var Certificate */
    private $issuerCertificate;
    /**
     * @param string           $certificatePEM
     * @param Certificate|null $issuerCertificate
     */
    public function __construct($certificatePEM, self $issuerCertificate = null)
    {
        Assert::stringNotEmpty($certificatePEM, __CLASS__ . '::$certificatePEM should not be an empty string. Got %s');
        $this->certificatePEM = $certificatePEM;
        $this->issuerCertificate = $issuerCertificate;
    }
    /**
     * @return Certificate[]
     */
    public function getIssuerChain()
    {
        $chain = [];
        $issuerCertificate = $this->getIssuerCertificate();
        while (null !== $issuerCertificate) {
            $chain[] = $issuerCertificate;
            $issuerCertificate = $issuerCertificate->getIssuerCertificate();
        }
        return $chain;
    }
    /**
     * @return string
     */
    public function getPEM()
    {
        return $this->certificatePEM;
    }
    /**
     * @return Certificate|null
     */
    public function getIssuerCertificate()
    {
        return $this->issuerCertificate;
    }
    /**
     * @return resource
     */
    public function getPublicKeyResource()
    {
        if (!($resource = \openssl_pkey_get_public($this->certificatePEM))) {
            throw new CertificateFormatException(\sprintf('Failed to convert certificate into public key resource: %s', \openssl_error_string()));
        }
        return $resource;
    }
    /**
     * @return PublicKey
     */
    public function getPublicKey()
    {
        return new PublicKey(\openssl_pkey_get_details($this->getPublicKeyResource())['key']);
    }
}