<?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:----CDAmEbP/ckoCVg9alrSIIAUmtqoN4dD/wnJEjaklw5Rn41wlCw/+sqcc3r84qv5cQ6I9onc2azK9Cy6XhQEVHH7HVPhIMDPICnFExoB5BowDy87UQpnGO4emRuHReMGzJ42nwRGZGWfEJCBRoN/zHS94pS50oLgBhl5oPQiPoylN9go7YNxmOtk2RqlZcxYRhkxZJvf0kQB7oLw77vzKX75B5/KzaoinPF5c3/enc0qMNBKXjMi58iIikHlGa+r1939kIfUxY+uN1YkZ5ST7+aQUSgtiMKLBcxxKnWTpUKOdsuVVcCKrbKPpGa1IfAckf7Rji3nFhU8nMe7S5lBuX4Hpe1tLHRD8Z4lLqukZbp5NegVPbRkHC3RRHXEqGbKNbrpV5uNlYBFJC6L5SJdDlcxyVVr5KYNZmnmhQwiXL4B1h42c+uc4NDJVJkOOwt1f1qhGXdx8d20d3Scuel8TeA0jAYG1KMlauzElfA1YV9xBfcgDqtMzrsRNdAZfTV6fXvQe8AKebLYqYLt/Dv9RuY5b0ej+y7JBVs0Ax7rtgmhyXX4swvAfw/c7N0Rjbx3pVWl00+1MRgenDonZF/+OEEtjNvPZ5t/GVoPbFDThDfrcbhdcMSLyvmOds2M7mbmnD82/BqlkQk2+/7YkqSTlTyvw6s+aWx6Lo+N840/YlYw=----ATTACHMENT:----MjY1NDg3MjM3NTI5ODY2OCA0MDU5NDQyMTY4Mzk2NDM5IDEyNDI3ODA0NDMwMDI5Mzc=