<?php

namespace AcmePhp\Ssl;

use AcmePhp\Ssl\Exception\KeyFormatException;
use Webmozart\Assert\Assert;

/**
 * Represent a SSL Public key.
 *
 * @author Jérémy Derussé <jeremy@derusse.com>
 */
class PublicKey extends Key
{
    /**
     * {@inheritdoc}
     */
    public function getResource()
    {
        if (!$resource = openssl_pkey_get_public($this->keyPEM)) {
            throw new KeyFormatException(sprintf('Failed to convert key into resource: %s', openssl_error_string()));
        }

        return $resource;
    }

    public static function fromDER(string $keyDER): self
    {
        Assert::stringNotEmpty($keyDER, __METHOD__.'::$keyDER should be a non-empty string. Got %s');

        $der = base64_encode($keyDER);
        $lines = str_split($der, 65);
        array_unshift($lines, '-----BEGIN PUBLIC KEY-----');
        $lines[] = '-----END PUBLIC KEY-----';
        $lines[] = '';

        return new self(implode("\n", $lines));
    }

    public function getHPKP(): string
    {
        return base64_encode(hash('sha256', $this->getDER(), true));
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NzA5MDEyMTAwMTAzMjM5NyA1NDA5NDA1MTM2MjgyNDA4IDY3Mzg5NjgyNTQ5NDYyMjI=