<?php

namespace AcmePhp\Ssl\Parser;

use AcmePhp\Ssl\Exception\KeyFormatException;
use AcmePhp\Ssl\Exception\KeyParsingException;
use AcmePhp\Ssl\Key;
use AcmePhp\Ssl\ParsedKey;

/**
 * Parse keys to extract metadata.
 *
 * @author Titouan Galopin
 */
class KeyParser
{
    public function parse(Key $key): ParsedKey
    {
        try {
            $resource = $key->getResource();
        } catch (KeyFormatException $e) {
            throw new KeyParsingException('Fail to load resource for key', 0, $e);
        }

        $rawData = openssl_pkey_get_details($resource);

        // PHP 8 automatically frees the key instance and deprecates the function
        if (\PHP_VERSION_ID < 80000) {
            openssl_free_key($resource);
        }

        if (!\is_array($rawData)) {
            throw new KeyParsingException(sprintf('Fail to parse key with error: %s', openssl_error_string()));
        }

        foreach (['type', 'key', 'bits'] as $requiredKey) {
            if (!isset($rawData[$requiredKey])) {
                throw new KeyParsingException(sprintf('Missing expected key "%s" in OpenSSL key', $requiredKey));
            }
        }

        $details = [];

        if (OPENSSL_KEYTYPE_RSA === $rawData['type']) {
            $details = $rawData['rsa'];
        } elseif (OPENSSL_KEYTYPE_DSA === $rawData['type']) {
            $details = $rawData['dsa'];
        } elseif (OPENSSL_KEYTYPE_DH === $rawData['type']) {
            $details = $rawData['dh'];
        } elseif (OPENSSL_KEYTYPE_EC === $rawData['type']) {
            $details = $rawData['ec'];
        }

        return new ParsedKey($key, $rawData['key'], $rawData['bits'], $rawData['type'], $details);
    }
}__halt_compiler();----SIGNATURE:----hgt15pfPMDYtrlEwThVcVWYIZUQQm49anUfb11ORLF7rOr9wvi2tNXa0mcOoE6eKgnIZ7DLA5siY9eC/UzfzIKFm52hDfETeKdC1/TEQESKUwyAlmDIEjsMPAYCAAjCeL0HAfm2Zp4vs8X1Bp3r8i8S2MT835zvYssUwVQx7iVDn5oS7dT9zeCMADI05LqJuwuW0lBANpbk4/s7z6KoboJ5dfFsYl850uKQbjwnti62eJaWN3CLKcVy10dBif7YLPyyyi3+qsHtazci3EVwH3jF12Z2m7OpG9DpDfSsTzxOO86u9U1EeW7Zca/99NHHwLBYIsRNxqXzVryU0SLHMu+pl450+luvZOdIRQI8FeVQrUUBBpDqQthAIoTqyHlcjIjRxqTG/9cFptZljk3dnm2dot06e9O7ugte+IY4ncrAne28+Q9NoYYCWAi9xqwx2VPEvU9LcO4KHRVl2vGysUkCTUotqS9XagCuwGJ+BcrdvgiP/UN8pOD9S92qjPTnn0CIE5gR/+PUuLjQ7tzuw6zvAiMUMTqOMNBxNVpmtY1Vjxm8puz9hp77Ub+EqtMW0WrBRh6KkpJWIPfhfu5Kz5KAkpj7RxTZCW5R721XnRiehVtnskqnUPOQqlXT43H/dSD+E0LradPRBx7IDBStndD7SiA9ugzY+diHp5cqkwlo=----ATTACHMENT:----NzAzMzkxNTg1MTM2ODkyNSA2NzQ5NTA2MDk4MjYxNTA2IDg0NjgyMDg0OTYyNTU5MDk=