<?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:----ODQ5ODQzOTYzMDI2NzY3OSA1Njg0MDIxOTE4MDY4NDY2IDM3OTQ0NTcwNjczNzkxMzU=