<?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:----MTMwNzg0NzYxMTU4ODQ1OSA5MTczNTU2Nzk0NTk5MjcgMTM1NzE2NzQ4OTA3MzA3NA==