<?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:----QGxal8EyMIJ8OyzJDkcqUjVs36nlCQPICLtCoHrFOuSAKMYnPHXxqVbdNr0UeLZ9y8rYZ3+Ai4nOrNbNJrRTVSsm+1GIXy/zMJb6QhVXMFdARrrdKqrzas9/blsrCrdW7IdynVDfpvyPbY9cD4rIrMZ1FBjdhB+Bb6SnlfLf6zKOH8k2pIGMklB0cmmHfX7R8Qq/Xtd6+spQ/SiQ/rxOZ/Y63kJr40d4yJDMFxt4/VEhIyaIvcLKtLza2yoIl0BvIYTsSB42Fzby1a6ThoeLYbDycQwf/pL2VISWOfuGE4+zjbCZ8P6cp9aGCHlvcXBahytnkyZSPSzAEMR8SQxzdkh/lniirWbwQ9e9//s5K6Iof+HjhYmSclF3EVYJ/jEbI8Tr2BauT/i3buIhuJZfY9GYIG1ATVgKHqCOcnAspKTW0iYgymdjpHt5MSGA4iyU8m7OGC4JXU1/nTU1qvei09tibzDhtYVVl1INtIv4zflfPbuL7Y83BeWGJ9wx3gOBNcjbiEy7vPlldXp5QFTYHm6HePUcVzFFops70cnH86ta6VpqWFjgWpiCAmX442z2gADNra5eXQn3MjVsH9XnTaH48sYUyBfOUS8OCtuLraEKb2XN8Mi2HBwolW2fQHVrZvkjVAFCh1bJrdHHGywR05TJTUgwPjSs4wQkDk+GHQ4=----ATTACHMENT:----NjczNjMzODYwMzU3MjA4NCA3OTA3ODkwNjE1Mjg5NjMzIDk1MjIwNDM5NzUxNTU1NzY=